xref: /freebsd/sys/contrib/dev/acpica/changes.txt (revision 0957b409)
1----------------------------------------
215 February 2019. Summary of changes for version 20190215:
3
4This release is available at https://acpica.org/downloads
5
6
70) Support for ACPI specification version 6.3:
8
9Add PCC operation region support for the AML interpreter. This adds PCC
10operation region support in the AML interpreter and a default handler for
11acpiexec. The change also renames the PCC region address space keyword to
12PlatformCommChannel.
13
14Support for new predefined methods _NBS, _NCH, _NIC, _NIH, and _NIG.
15These methods provide OSPM with health information and device boot
16status.
17
18PDTT: Add TriggerOrder to the PCC Identifier structure. The field value
19defines if the trigger needs to be invoked by OSPM before or at the end
20of kernel crash dump processing/handling operation.
21
22SRAT: Add Generic Affinity Structure subtable. This subtable in the SRAT
23is used for describing devices such as heterogeneous processors,
24accelerators, GPUs, and IO devices with integrated compute or DMA
25engines.
26
27MADT: Add support for statistical profiling in GICC. Statistical
28profiling extension (SPE) is an architecture-specific feature for ARM.
29
30MADT: Add online capable flag. If this bit is set, system hardware
31supports enabling this processor during OS runtime.
32
33New Error Disconnect Recover Notification value. There are a number of
34scenarios where system Firmware in collaboration with hardware may
35disconnect one or more devices from the rest of the system for purposes
36of error containment. Firmware can use this new notification value to
37alert OSPM of such a removal.
38
39PPTT: New additional fields in Processor Structure Flags. These flags
40provide more information about processor topology.
41
42NFIT/Disassembler: Change a field name from "Address Range" to "Region
43Type".
44
45HMAT updates: make several existing fields to be reserved as well as
46rename subtable 0 to "memory proximity domain attributes".
47
48GTDT: Add support for new GTDT Revision 3. This revision adds information
49for the EL2 timer.
50
51iASL: Update the HMAT example template for new fields.
52
53iASL: Add support for the new revision of the GTDT (Rev 3).
54
55
561) ACPICA kernel-resident subsystem:
57
58AML Parser: fix the main AML parse loop to correctly skip erroneous
59extended opcodes. AML opcodes come in two lengths: 1-byte opcodes and 2-
60byte extended opcodes. If an error occurs during an AML table load, the
61AML parser will continue loading the table by skipping the offending
62opcode. This implements a "load table at any cost" philosophy.
63
64
652) iASL Compiler/Disassembler and Tools:
66
67iASL: Add checks for illegal object references, such as a reference
68outside of method to an object within a method. Such an object is only
69temporary.
70
71iASL: Emit error for creation of a zero-length operation region. Such a
72region is rather pointless. If encountered, a runtime error is also
73implemented in the interpeter.
74
75Debugger: Fix a possible fault with the "test objects" command.
76
77iASL: Makefile: support parent directory filenames containing embedded
78spaces.
79
80iASL: Update the TPM2 template to revision 4.
81
82iASL: Add the ability to report specific warnings or remarks as errors.
83
84Disassembler: Disassemble OEMx tables as actual AML byte code.
85Previously, these tables were treated as "unknown table".
86
87iASL: Add definition and disassembly for TPM2 revision 3.
88
89iASL: Add support for TPM2 rev 3 compilation.
90
91
92----------------------------------------
9308 January 2019. Summary of changes for version 20190108:
94
95
961) ACPICA kernel-resident subsystem:
97
98Updated all copyrights to 2019. This affects all source code modules.
99
100
1012) iASL Compiler/Disassembler and Tools:
102
103ASL test suite (ASLTS): Updated all copyrights to 2019.
104
105Tools: Updated all signon copyrights to 2019.
106
107AcpiExec: Added a new option to dump extra information concerning any
108memory leaks detected by the internal object/cache tracking mechanism. -
109va
110
111iASL: Updated the table template for the TPM2 table to the newest version
112of the table (Revision 4)
113
114
115----------------------------------------
11613 December 2018. Summary of changes for version 20181213:
117
118
1191) ACPICA Kernel-resident Subsystem:
120
121Fixed some buffer length issues with the GenericSerialBus, related to two
122of the bidirectional protocols: AttribRawProcessBytes and AttribRawBytes,
123which are rarely seen in the field. For these, the LEN field of the ASL
124buffer is now ignored. Hans de Goede
125
126Implemented a new object evaluation trace mechanism for control methods
127and data objects. This includes nested control methods. It is
128particularly useful for examining the ACPI execution during system
129initialization since the output is relatively terse. The flag below
130enables the output of the trace via the ACPI_DEBUG_PRINT_RAW interface:
131   #define ACPI_LV_EVALUATION          0x00080000
132
133Examples:
134   Enter evaluation       :  _SB.PCI0._INI (Method)
135   Exit evaluation        :  _SB.PCI0._INI
136   Enter evaluation       :  _OSI (Method)
137   Exit evaluation        :  _OSI
138   Enter evaluation       :  _SB.PCI0.TEST (Method)
139   Nested method call     :     _SB.PCI0.NST1
140   Exit nested method     :     _SB.PCI0.NST1
141   Exit evaluation        :  _SB.PCI0.TEST
142
143Added two recently-defined _OSI strings. See
144https://docs.microsoft.com/en-us/windows-hardware/drivers/acpi/winacpi-
145osi.
146   "Windows 2018"
147   "Windows 2018.2"
148
149Update for buffer-to-string conversions via the ToHexString ASL operator.
150A "0x" is now prepended to each of the hex values in the output string.
151This provides compatibility with other ACPI implementations. The ACPI
152specification is somewhat vague on this issue.
153   Example output string after conversion:
154"0x01,0x02,0x03,0x04,0x05,0x06"
155
156Return a run-time error for TermArg expressions within individual package
157elements. Although this is technically supported by the ASL grammar,
158other ACPI implementations do not support this either. Also, this fixes a
159fault if this type of construct is ever encountered (it never has been).
160
161
1622) iASL Compiler/Disassembler and Tools:
163
164iASL: Implemented a new compile option (-ww) that will promote individual
165warnings and remarks to errors. This is intended to enhance the firmware
166build process.
167
168AcpiExec: Implemented a new command-line option (-eo) to support the new
169object evaluation trace mechanism described above.
170
171Disassembler: Added support to disassemble OEMx tables as AML/ASL tables
172instead of a "unknown table" message.
173
174AcpiHelp: Improved support for the "special" predefined names such as
175_Lxx, _Exx, _EJx, _T_x, etc. For these, any legal hex value can now be
176used for "xx" and "x".
177
178----------------------------------------
17931 October 2018. Summary of changes for version 20181031:
180
181
182An Operation Region regression was fixed by properly adding address
183ranges to a global list during initialization. This allows OS to
184accurately check for overlapping regions between native devices (such as
185PCI) and Operation regions as well as checking for region conflicts
186between two Operation Regions.
187
188Added support for the 2-byte extended opcodes in the code/feature that
189attempts to continue parsing during the table load phase. Skip parsing
190Device declarations (and other extended opcodes) when an error occurs
191during parsing. Previously, only single-byte opcodes were supported.
192
193Cleanup: Simplified the module-level code support by eliminating a
194useless global variable (AcpiGbl_GroupModuleLeveCode).
195
196
1972) iASL Compiler/Disassembler and Tools:
198
199iASL/Preprocessor: Fixed a regression where an incorrect use of ACPI_FREE
200could cause a fault in the preprocessor. This was an inadvertent side-
201effect from moving more allocations/frees to the local cache/memory
202mechanism.
203
204iASL: Enhanced error detection by validating that all NameSeg elements
205within a NamePatch actually exist. The previous behavior was spotty at
206best, and such errors could be improperly ignored at compiler time (never
207at runtime, however. There are two new error messages, as shown in the
208examples below:
209
210dsdt.asl     33:     CreateByteField (TTTT.BXXX, 1, CBF1)
211Error    6161 -                              ^ One or more objects within
212the Pathname do not exist (TTTT.BXXX)
213
214dsdt.asl     34:     CreateByteField (BUF1, UUUU.INT1, BBBB.CBF1)
215Error    6160 -        One or more prefix Scopes do not exist ^
216(BBBB.CBF1)
217
218iASL: Disassembler/table-compiler: Added support for the static data
219table TPM2 revision 3 (an older version of TPM2). The support has been
220added for the compiler and the disassembler.
221
222Fixed compilation of DOS format data table file on Unix/Linux systems.
223iASL now properly detects line continuations (\) for DOS format data
224table definition language files on when executing on Unix/Linux.
225
226----------------------------------------
22703 October 2018. Summary of changes for version 20181003:
228
229
2302) iASL Compiler/Disassembler and Tools:
231
232Fixed a regression introduced in version 20180927 that could cause the
233compiler to fault, especially with NamePaths containing one or more
234carats (^). Such as: ^^_SB_PCI0
235
236Added a new remark for the Sleep() operator when the sleep time operand
237is larger than one second. This is a very long time for the ASL/BIOS code
238and may not be what was intended by the ASL writer.
239
240----------------------------------------
24127 September 2018. Summary of changes for version 20180927:
242
243
2441) ACPICA kernel-resident subsystem:
245
246Updated the GPE support to clear the status of all ACPI events when
247entering any/all sleep states in order to avoid premature wakeups. In
248theory, this may cause some wakeup events to be missed, but the
249likelihood of this is small. This change restores the original behavior
250of the ACPICA code in order to fix a regression seen from the previous
251"Stop unconditionally clearing ACPI IRQs during suspend/resume" change.
252This regression could cause some systems to incorrectly wake immediately.
253
254Updated the execution of the _REG methods during initialization and
255namespace loading to bring the behavior into closer conformance to the
256ACPI specification and other ACPI implementations:
257
258From the ACPI specification 6.2A, section 6.5.4 "_REG (Region):
259    "Control methods must assume all operation regions are inaccessible
260until the _REG(RegionSpace, 1) method is executed"
261
262    "The exceptions to this rule are:
2631.  OSPM must guarantee that the following operation regions are always
264accessible:
265    SystemIO operation regions.
266    SystemMemory operation regions when accessing memory returned by the
267System Address Map reporting interfaces."
268
269Since the state of both the SystemIO and SystemMemory address spaces are
270defined by the specification to never change, this ACPICA change ensures
271that now _REG is never called on them. This solves some problems seen in
272the field and provides compatibility with other ACPI implementations. An
273update to the upcoming new version of the ACPI specification will help
274clarify this behavior.
275
276Updated the implementation of support for the Generic Serial Bus. For the
277"bidirectional" protocols, the internal implementation now automatically
278creates a return data buffer of the maximum size (255). This handles the
279worst-case for data that is returned from the serial bus handler, and
280fixes some problems seen in the field. This new buffer is directly
281returned to the ASL. As such, there is no true "bidirectional" buffer,
282which matches the ACPI specification. This is the reason for the "double
283store" seen in the example ASL code in the specification, shown below:
284
285Word Process Call (AttribProcessCall):
286    OperationRegion(TOP1, GenericSerialBus, 0x00, 0x100)
287    Field(TOP1, BufferAcc, NoLock, Preserve)
288    {
289        FLD1, 8, // Virtual register at command value 1.
290    }
291
292    Name(BUFF, Buffer(20){}) // Create GenericSerialBus data buffer
293                             // as BUFF
294    CreateWordField(BUFF, 0x02, DATA) // DATA = Data (Word)
295
296    Store(0x5416, DATA)               // Save 0x5416 into the data buffer
297    Store(Store(BUFF, FLD1), BUFF)    // Invoke a write/read Process Call
298transaction
299                           // This is the "double store". The write to
300                           // FLD1 returns a new buffer, which is stored
301                           // back into BUFF with the second Store.
302
303
3042) iASL Compiler/Disassembler and Tools:
305
306iASL: Implemented detection of extraneous/redundant uses of the Offset()
307operator within a Field Unit list. A remark is now issued for these. For
308example, the first two of the Offset() operators below are extraneous.
309Because both the compiler and the interpreter track the offsets
310automatically, these Offsets simply refer to the current offset and are
311unnecessary. Note, when optimization is enabled, the iASL compiler will
312in fact remove the redundant Offset operators and will not emit any AML
313code for them.
314
315    OperationRegion (OPR1, SystemMemory, 0x100, 0x100)
316    Field (OPR1)
317    {
318        Offset (0),     // Never needed
319        FLD1, 32,
320        Offset (4),     // Redundant, offset is already 4 (bytes)
321        FLD2, 8,
322        Offset (64),    // OK use of Offset.
323        FLD3, 16,
324    }
325dsdt.asl     14:         Offset (0),
326Remark   2158 -                 ^ Unnecessary/redundant use of Offset
327operator
328
329dsdt.asl     16:         Offset (4),
330Remark   2158 -                 ^ Unnecessary/redundant use of Offset
331operator
332
333----------------------------------------
33410 August 2018. Summary of changes for version 20180810:
335
336
3371) ACPICA kernel-resident subsystem:
338
339Initial ACPI table loading: Attempt to continue loading ACPI tables
340regardless of malformed AML. Since migrating table initialization to the
341new module-level code support, the AML interpreter rejected tables upon
342any ACPI error encountered during table load. This is a problem because
343non-serious ACPI errors during table load do not necessarily mean that
344the entire definition block (DSDT or SSDT) is invalid. This change
345improves the table loading by ignoring some types of errors that can be
346generated by incorrect AML. This can range from object type errors, scope
347errors, and index errors.
348
349Suspend/Resume support: Update to stop unconditionally clearing ACPI IRQs
350during suspend/resume. The status of ACPI events is no longer cleared
351when entering the ACPI S5 system state (power off) which caused some
352systems to power up immediately after turning off power in certain
353situations. This was a functional regression. It was fixed by clearing
354the status of all ACPI events again when entering S5 (for system-wide
355suspend or hibernation the clearing of the status of all events is not
356desirable, as it might cause the kernel to miss wakeup events sometimes).
357Rafael Wysocki.
358
359
3602) iASL Compiler/Disassembler and Tools:
361
362AcpiExec: Enhanced the -fi option (Namespace initialization file). Field
363elements listed in the initialization file were previously initialized
364after the table load and before executing module-level code blocks.
365Recent changes in the module-level code support means that the table load
366becomes a large control method execution. If fields are used within
367module-level code and we are executing with the -fi option, the
368initialization values were used to initialize the namespace object(s)
369only after the table was finished loading. This change Provides an early
370initialization of objects specified in the initialization file so that
371field unit values are populated during the table load (not after the
372load).
373
374AcpiExec: Fixed a small memory leak regression that could result in
375warnings during exit of the utility. These warnings were similar to
376these:
377    0002D690 Length 0x0006 nsnames-0502 [Not a Descriptor - too small]
378    0002CD70 Length 0x002C utcache-0453 [Operand] Integer RefCount 0x0001
379
380----------------------------------------
38129 June 2018. Summary of changes for version 20180629:
382
383
3841) iASL Compiler/Disassembler and Tools:
385
386iASL: Fixed a regression related to the use of the ASL External
387statement. Error checking for the use of the External() statement has
388been relaxed. Previously, a restriction on the use of External meant that
389the referenced named object was required to be defined in a different
390table (an SSDT). Thus it would be an error to declare an object as an
391external and then define the same named object in the same table. For
392example:
393    DefinitionBlock (...)
394    {
395        External (DEV1)
396        Device (DEV1){...} // This was an error
397    }
398However, this behavior has caused regressions in some existing ASL code,
399because there is code that depends on named objects and externals (with
400the same name) being declared in the same table. This change will allow
401the ASL code above to compile without errors or warnings.
402
403iASL: Implemented ASL language extensions for four operators to make some
404of their arguments optional instead of required:
405    1) Field (RegionName, AccessType, LockRule, UpdateRule)
406    2) BankField (RegionName, BankName, BankValue,
407                AccessType, LockRule, UpdateRule)
408    3) IndexField (IndexName, DataName,
409                AccessType, LockRule, UpdateRule)
410For the Field operators above, the AccessType, LockRule, and UpdateRule
411are now optional arguments. The default values are:
412        AccessType: AnyAcc
413        LockRule:   NoLock
414        UpdateRule: Preserve
415    4) Mutex (MutexName, SyncLevel)
416For this operator, the SyncLevel argument is now optional. This argument
417is rarely used in any meaningful way by ASL code, and thus it makes sense
418to make it optional. The default value is:
419        SyncLevel:  0
420
421iASL: Attempted use of the ASL Unload() operator now results in the
422following warning:
423    "Unload is not supported by all operating systems"
424This is in fact very true, and the Unload operator may be completely
425deprecated in the near future.
426
427AcpiExec: Fixed a regression for the -fi option (Namespace initialization
428file. Recent changes in the ACPICA module-level code support altered the
429table load/initialization sequence . This means that the table load has
430become a large method execution of the table itself. If Operation Region
431Fields are used within any module-level code and the -fi option was
432specified, the initialization values were populated only after the table
433had completely finished loading (and thus the module-level code had
434already been executed). This change moves the initialization of objects
435listed in the initialization file to before the table is executed as a
436method. Field unit values are now initialized before the table execution
437is performed.
438
439----------------------------------------
44031 May 2018. Summary of changes for version 20180531:
441
442
4431) ACPICA kernel-resident Subsystem:
444
445Implemented additional support to help ensure that a DSDT or SSDT is
446fully loaded even if errors are incurred during the load. The majority of
447the problems that are seen is the failure of individual AML operators
448that occur during execution of any module-level code (MLC) existing in
449the table. This support adds a mechanism to abort the current ASL
450statement (AML opcode), emit an error message, and to simply move on to
451the next opcode -- instead of aborting the entire table load. This is
452different than the execution of a control method where the entire method
453is aborted upon any error. The goal is to perform a very "best effort" to
454load the ACPI tables. The most common MLC errors that have been seen in
455the field are direct references to unresolved ASL/AML symbols (referenced
456directly without the use of the CondRefOf operator to validate the
457symbol). This new ACPICA behavior is now compatible with other ACPI
458implementations.
459
460Interpreter: The Unload AML operator is no longer supported for the
461reasons below. An AE_NOT_IMPLEMENTED exception is returned.
4621) A correct implementation on at least some hosts may not be possible.
4632) Other ACPI implementations do not correctly/fully support it.
4643) It requires host device driver support which is not known to exist.
465    (To properly support namespace unload out from underneath.)
4664) This AML operator has never been seen in the field.
467
468Parser: Added a debug option to dump AML parse sub-trees as they are
469being executed. Used with ACPI_DEBUG_PRINT, the enabling debug level is
470ACPI_DB_PARSE_TREES.
471
472Debugger: Reduced the verbosity for errors incurred during table load and
473module-level code execution.
474
475Completed an investigation into adding a namespace node "owner list"
476instead of the current "owner ID" associated with namespace nodes. This
477list would link together all nodes that are owned by an individual
478control method. The purpose would be to enhance control method execution
479by speeding up cleanup during method exit (all namespace nodes created by
480a method are deleted upon method termination.) Currently, the entire
481namespace must be searched for matching owner IDs if (and only if) the
482method creates named objects outside of the local scope. However, by far
483the most common case is that methods create objects locally, not outside
484the method scope. There is already an ACPICA optimization in place that
485only searches the entire namespace in the rare case of a method creating
486objects elsewhere in the namespace. Therefore, it is felt that the
487overhead of adding an additional pointer to each namespace node to
488implement the owner list makes this feature unnecessary.
489
490
4912) iASL Compiler/Disassembler and Tools:
492
493iASL, Disassembler, and Template generator: Implemented support for
494Revision D of the IORT table. Adds a new subtable that is used to specify
495SMMUv3 PMCGs. rmurphy-arm.
496
497Disassembler: Restored correct table header validation for the "special"
498ACPI tables -- RSDP and FACS. These tables do not contain a standard ACPI
499table header and must be special-cased. This was a regression that has
500been present for apparently a long time.
501
502AcpiExec: Reduced verbosity of the local exception handler implemented
503within acpiexec. This handler is invoked by ACPICA upon any exceptions
504generated during control method execution. A new option was added: -vh
505restores the original verbosity level if desired.
506
507AcpiExec: Changed the default base from decimal to hex for the -x option
508(set debug level). This simplifies the use of this option and matches the
509behavior of the corresponding iASL -x option.
510
511AcpiExec: Restored a force-exit on multiple control-c (sigint)
512interrupts. This allows program termination even if other issues cause
513the control-c to fail.
514
515ASL test suite (ASLTS): Added tests for the recently implemented package
516element resolution mechanism that allows forward references to named
517objects from individual package elements (this mechanism provides
518compatibility with other ACPI implementations.)
519
520
521----------------------------------------
5228 May 2018. Summary of changes for version 20180508:
523
524
5251) ACPICA kernel-resident subsystem:
526
527Completed the new (recently deployed) package resolution mechanism for
528the Load and LoadTable ASL/AML operators. This fixes a regression that
529was introduced in version 20180209 that could result in an
530AE_AML_INTERNAL exception during the loading of a dynamic ACPI/AML table
531(SSDT) that contains package objects.
532
533
5342) iASL Compiler/Disassembler and Tools:
535
536AcpiDump and AcpiXtract: Implemented support for ACPI tables larger than
5371 MB. This change allows for table offsets within the acpidump file to be
538up to 8 characters. These changes are backwards compatible with existing
539acpidump files.
540
541
542----------------------------------------
54327 April 2018. Summary of changes for version 20180427:
544
545
5461) ACPICA kernel-resident subsystem:
547
548Debugger: Added support for Package objects in the "Test Objects"
549command. This command walks the entire namespace and evaluates all named
550data objects (Integers, Strings, Buffers, and now Packages).
551
552Improved error messages for the namespace root node. Originally, the root
553was referred to by the confusing string "\___". This has been replaced by
554"Namespace Root" for clarification.
555
556Fixed a potential infinite loop in the AcpiRsDumpByteList function. Colin
557Ian King <colin.king@canonical.com>.
558
559
5602) iASL Compiler/Disassembler and Tools:
561
562iASL: Implemented support to detect and flag illegal forward references.
563For compatibility with other ACPI implementations, these references are
564now illegal at the root level of the DSDT or SSDTs. Forward references
565have always been illegal within control methods. This change should not
566affect existing ASL/AML code because of the fact that these references
567have always been illegal in the other ACPI implementation.
568
569iASL: Added error messages for the case where a table OEM ID and OEM
570TABLE ID strings are longer than the ACPI-defined length. Previously,
571these strings were simply silently truncated.
572
573iASL: Enhanced the -tc option (which creates an AML hex file in C,
574suitable for import into a firmware project):
575  1) Create a unique name for the table, to simplify use of multiple
576SSDTs.
577  2) Add a protection #ifdef in the file, similar to a .h header file.
578With assistance from Sami Mujawar, sami.mujawar@arm.com and Evan Lloyd,
579evan.lloyd@arm.com
580
581AcpiExec: Added a new option, -df, to disable the local fault handler.
582This is useful during debugging, where it may be desired to drop into a
583debugger on a fault.
584
585----------------------------------------
58613 March 2018. Summary of changes for version 20180313:
587
588
5891) ACPICA kernel-resident subsystem:
590
591Implemented various improvements to the GPE support:
592
5931) Dispatch all active GPEs at initialization time so that no GPEs are
594lost.
5952) Enable runtime GPEs earlier. Some systems expect GPEs to be enabled
596before devices are enumerated.
5973) Don't unconditionally clear ACPI IRQs during suspend/resume, so that
598IRQs are not lost.
5994) Add parallel GPE handling to eliminate the possibility of dispatching
600the same GPE twice.
6015) Dispatch any pending GPEs after enabling for the first time.
602
603AcpiGetObjectInfo - removed support for the _STA method. This was causing
604problems on some platforms.
605
606Added a new _OSI string, "Windows 2017.2".
607
608Cleaned up and simplified the module-level code support. These changes
609are in preparation for the eventual removal of the legacy MLC support
610(deferred execution), replaced by the new MLC architecture which executes
611the MLC as a table is loaded (DSDT/SSDTs).
612
613Changed a compile-time option to a runtime option. Changes the option to
614ignore ACPI table load-time package resolution errors into a runtime
615option. Used only for platforms that generate many AE_NOT_FOUND errors
616during boot. AcpiGbl_IgnorePackageResolutionErrors.
617
618Fixed the ACPI_ERROR_NAMESPACE macro. This change involves putting some
619ACPI_ERROR_NAMESPACE parameters inside macros. By doing so, we avoid
620compilation errors from unused variables (seen with some compilers).
621
622
6232) iASL Compiler/Disassembler and Tools:
624
625ASLTS: parallelized execution in order to achieve an (approximately) 2X
626performance increase.
627
628ASLTS: Updated to use the iASL __LINE__ and __METHOD__ macros. Improves
629error reporting.
630
631----------------------------------------
63209 February 2018. Summary of changes for version 20180209:
633
634
6351) ACPICA kernel-resident subsystem:
636
637Completed the final integration of the recent changes to Package Object
638handling and the module-level AML code support. This allows forward
639references from individual package elements when the package object is
640declared from within module-level code blocks. Provides compatibility
641with other ACPI implementations.
642
643The new architecture for the AML module-level code has been completed and
644is now the default for the ACPICA code. This new architecture executes
645the module-level code in-line as the ACPI table is loaded/parsed instead
646of the previous architecture which deferred this code until after the
647table was fully loaded. This solves some ASL code ordering issues and
648provides compatibility with other ACPI implementations. At this time,
649there is an option to fallback to the earlier architecture, but this
650support is deprecated and is planned to be completely removed later this
651year.
652
653Added a compile-time option to ignore AE_NOT_FOUND exceptions during
654resolution of named reference elements within Package objects. Although
655this is potentially a serious problem, it can generate a lot of
656noise/errors on platforms whose firmware carries around a bunch of unused
657Package objects. To disable these errors, define
658ACPI_IGNORE_PACKAGE_RESOLUTION_ERRORS in the OS-specific header. All
659errors are always reported for ACPICA applications such as AcpiExec.
660
661Fixed a regression related to the explicit type-conversion AML operators
662(ToXXXX). The regression was introduced early in 2017 but was not seen
663until recently because these operators are not fully supported by other
664ACPI implementations and are thus rarely used by firmware developers. The
665operators are defined by the ACPI specification to not implement the
666"implicit result object conversion". The regression incorrectly
667introduced this object conversion for the following explicit conversion
668operators:
669    ToInteger
670    ToString
671    ToBuffer
672    ToDecimalString
673    ToHexString
674    ToBCD
675    FromBCD
676
677
6782) iASL Compiler/Disassembler and Tools:
679
680iASL: Fixed a problem with the compiler constant folding feature as
681related to the ToXXXX explicit conversion operators. These operators do
682not support the "implicit result object conversion" by definition. Thus,
683ASL expressions that use these operators cannot be folded to a simple
684Store operator because Store implements the implicit conversion. This
685change uses the CopyObject operator for the ToXXXX operator folding
686instead. CopyObject is defined to not implement implicit result
687conversions and is thus appropriate for folding the ToXXXX operators.
688
689iASL: Changed the severity of an error condition to a simple warning for
690the case where a symbol is declared both locally and as an external
691symbol. This accommodates existing ASL code.
692
693AcpiExec: The -ep option to enable the new architecture for module-level
694code has been removed. It is replaced by the -dp option which instead has
695the opposite effect: it disables the new architecture (the default) and
696enables the legacy architecture. When the legacy code is removed in the
697future, the -dp option will be removed also.
698
699----------------------------------------
70005 January 2018. Summary of changes for version 20180105:
701
702
7031) ACPICA kernel-resident subsystem:
704
705Updated all copyrights to 2018. This affects all source code modules.
706
707Fixed a possible build error caused by an unresolved reference to the
708AcpiUtSafeStrncpy function.
709
710Removed NULL pointer arithmetic in the various pointer manipulation
711macros. All "(void *) NULL" constructs are converted to "(void *) 0".
712This eliminates warnings/errors in newer C compilers. Jung-uk Kim.
713
714Added support for A32 ABI compilation, which uses the ILP32 model. Anuj
715Mittal.
716
717
7182) iASL Compiler/Disassembler and Tools:
719
720ASLTS: Updated all copyrights to 2018.
721
722Tools: Updated all signon copyrights to 2018.
723
724AcpiXtract: Fixed a regression related to ACPI table signatures where the
725signature was truncated to 3 characters (instead of 4).
726
727AcpiExec: Restore the original terminal mode after the use of the -v and
728-vd options.
729
730ASLTS: Deployed the iASL __METHOD__ macro across the test suite.
731
732----------------------------------------
73314 December 2017. Summary of changes for version 20171214:
734
735
7361) ACPICA kernel-resident subsystem:
737
738Fixed a regression in the external (public) AcpiEvaluateObjectTyped
739interface where the optional "pathname" argument had inadvertently become
740a required argument returning an error if omitted (NULL pointer
741argument).
742
743Fixed two possible memory leaks related to the recently developed "late
744resolution" of reference objects within ASL Package Object definitions.
745
746Added two recently defined _OSI strings: "Windows 2016" and "Windows
7472017". Mario Limonciello.
748
749Implemented and deployed a safer version of the C library function
750strncpy:  AcpiUtSafeStrncpy. The intent is to at least prevent the
751creation of unterminated strings as a possible result of a standard
752strncpy.
753
754Cleaned up and restructured the global variable file (acglobal.h). There
755are many changes, but no functional changes.
756
757
7582) iASL Compiler/Disassembler and Tools:
759
760iASL Table Compiler: Fixed a problem with the DBG2 ACPI table where the
761optional OemData field at the end of the table was incorrectly required
762for proper compilation. It is now correctly an optional field.
763
764ASLTS: The entire suite was converted from standard ASL to the ASL+
765language, using the ASL-to-ASL+ converter which is integrated into the
766iASL compiler. A binary compare of all output files has verified the
767correctness of the conversion.
768
769iASL: Fixed the source code build for platforms where "char" is unsigned.
770This affected the iASL lexer only. Jung-uk Kim.
771
772----------------------------------------
77310 November 2017. Summary of changes for version 20171110:
774
775
7761) ACPICA kernel-resident subsystem:
777
778This release implements full support for ACPI 6.2A:
779    NFIT - Added a new subtable, "Platform Capabilities Structure"
780No other changes to ACPICA were required, since ACPI 6.2A is primarily an
781errata release of the specification.
782
783Other ACPI table changes:
784    IORT: Added the SMMUv3 Device ID mapping index. Hanjun Guo
785    PPTT: Added cache attribute flag definitions to actbl1.h. Jeremy
786Linton
787
788Utilities: Modified the string/integer conversion functions to use
789internal 64-bit divide support instead of a native divide. On 32-bit
790platforms, a 64-bit divide typically requires a library function which
791may not be present in the build (kernel or otherwise).
792
793Implemented a targeted error message for timeouts returned from the
794Embedded Controller device driver. This is seen frequently enough to
795special-case an AE_TIME returned from an EC operation region access:
796    "Timeout from EC hardware or EC device driver"
797
798Changed the "ACPI Exception" message prefix to "ACPI Error" so that all
799runtime error messages have the identical prefix.
800
801
8022) iASL Compiler/Disassembler and Tools:
803
804AcpiXtract: Fixed a problem with table header detection within the
805acpidump file. Processing a table could be ended early if a 0x40 (@)
806appears in the original binary table, resulting in the @ symbol appearing
807in the decoded ASCII field at the end of the acpidump text line. The
808symbol caused acpixtract to incorrectly think it had reached the end of
809the current table and the beginning of a new table.
810
811AcpiXtract: Added an option (-f) to ignore some errors during table
812extraction. This initial implementation ignores non-ASCII and non-
813printable characters found in the acpidump text file.
814
815TestSuite(ASLTS)/AcpiExec: Fixed and restored the memory usage statistics
816for ASLTS. This feature is used to track memory allocations from
817different memory caches within the ACPICA code. At the end of an ASLTS
818run, these memory statistics are recorded and stored in a log file.
819
820Debugger (user-space version): Implemented a simple "Background" command.
821Creates a new thread to execute a control method in the background, while
822control returns to the debugger prompt to allow additional commands.
823    Syntax: Background <Namepath> [Arguments]
824
825----------------------------------------
82629 September 2017. Summary of changes for version 20170929:
827
828
8291) ACPICA kernel-resident subsystem:
830
831Redesigned and implemented an improved ASL While() loop timeout
832mechanism. This mechanism is used to prevent infinite loops in the kernel
833AML interpreter caused by either non-responsive hardware or incorrect AML
834code. The new implementation uses AcpiOsGetTimer instead of a simple
835maximum loop count, and is thus more accurate and constant across
836different machines. The default timeout is currently 30 seconds, but this
837may be adjusted later.
838
839Renamed the ACPI_AML_INFINITE_LOOP exception to AE_AML_LOOP_TIMEOUT to
840better reflect the new implementation of the loop timeout mechanism.
841
842Updated the AcpiGetTimerDuration interface to cleanup the 64-bit support
843and to fix an off-by-one error. Jung-uk Kim.
844
845Fixed an EFI build problem by updating the makefiles to for a new file
846that was added, utstrsuppt.c
847
848
8492) iASL Compiler/Disassembler and Tools:
850
851Implemented full support for the PDTT, SDEV, and TPM2 ACPI tables. This
852includes support in the table disassembler, compiler, and template
853generator.
854
855iASL: Added an exception for an illegal type of recursive method
856invocation. If a method creates named objects, the first recursive call
857will fail at runtime. This change adds an error detection at compile time
858to catch the problem up front. Note: Marking such a method as
859"serialized" will not help with this problem, because the same thread can
860acquire the method mutex more than once. Example compiler and runtime
861output:
862
863    Method (MTH1)
864    {
865        Name (INT1, 1)
866        MTH1 ()
867    }
868
869    dsdt.asl     22: MTH1 ()
870    Error    6152 -  ^ Illegal recursive call to method
871                       that creates named objects (MTH1)
872
873Previous runtime exception:
874    ACPI Error: [INT1] Namespace lookup failure,
875    AE_ALREADY_EXISTS (20170831/dswload2-465)
876
877iASL: Updated support for External() opcodes to improve namespace
878management and error detection. These changes are related to issues seen
879with multiple-segment namespace pathnames within External declarations,
880such as below:
881
882    External(\_SB.PCI0.GFX0, DeviceObj)
883    External(\_SB.PCI0.GFX0.ALSI)
884
885iASL: Implemented support for multi-line error/warning messages. This
886enables more detailed and helpful error messages as below, from the
887initial deployment for the duplicate names error:
888
889    DSDT.iiii   1692:       Device(PEG2) {
890    Error    6074 -                  ^ Name already exists in scope
891(PEG2)
892
893        Original name creation/declaration below:
894        DSDT.iiii     93:   External(\_SB.PCI0.PEG2, DeviceObj)
895
896AcpiXtract: Added additional flexibility to support differing input hex
897dump formats. Specifically, hex dumps that contain partial disassembly
898and/or comments within the ACPI table data definition. There exist some
899dump utilities seen in the field that create this type of hex dump (such
900as Simics). For example:
901
902    DSDT @ 0xdfffd0c0 (10999 bytes)
903        Signature DSDT
904        Length 10999
905        Revision 1
906        Checksum 0xf3 (Ok)
907        OEM_ID BXPC
908        OEM_table_id BXDSDT
909        OEM_revision 1
910        Creator_id 1280593481
911        Creator_revision 537399345
912      0000: 44 53 44 54 f7 2a 00 00 01 f3 42 58 50 43 00 00
913      ...
914      2af0: 5f 4c 30 46 00 a4 01
915
916Test suite: Miscellaneous changes/fixes:
917    More cleanup and simplification of makefiles
918    Continue compilation of test cases after a compile failure
919    Do not perform binary compare unless both files actually exist
920
921iASL: Performed some code/module restructuring. Moved all memory
922allocation functions to new modules. Two new files, aslallocate.c and
923aslcache.c
924
925----------------------------------------
92631 August 2017. Summary of changes for version 20170831:
927
928
9291) ACPICA kernel-resident subsystem:
930
931Implemented internal support for full 64-bit addresses that appear in all
932Generic Address Structure (GAS) structures. Previously, only the lower 32
933bits were used. Affects the use of GAS structures in the FADT and other
934tables, as well as the GAS structures passed to the AcpiRead and
935AcpiWrite public external interfaces that are used by drivers. Lv Zheng.
936
937Added header support for the PDTT ACPI table (Processor Debug Trigger
938Table). Full support in the iASL Data Table Compiler and disassembler is
939forthcoming.
940
941
9422) iASL Compiler/Disassembler and Tools:
943
944iASL/Disassembler: Fixed a problem with the PPTT ACPI table (Processor
945Properties Topology Table) where a flag bit was specified in the wrong
946bit position ("Line Size Valid", bit 6).
947
948iASL: Implemented support for Octal integer constants as defined by the
949ASL language grammar, per the ACPI specification. Any integer constant
950that starts with a zero is an octal constant. For example,
951    Store (037777, Local0) /* Octal constant */
952    Store (0x3FFF, Local0) /* Hex equivalent */
953    Store (16383,  Local0) /* Decimal equivalent */
954
955iASL: Improved overflow detection for 64-bit string conversions during
956compilation of integer constants. "Overflow" in this case means a string
957that represents an integer that is too large to fit into a 64-bit value.
958Any 64-bit constants within a 32-bit DSDT or SSDT are still truncated to
959the low-order 32 bits with a warning, as previously implemented. Several
960new exceptions are defined that indicate a 64-bit overflow, as well as
961the base (radix) that was used during the attempted conversion. Examples:
962    Local0 = 0xAAAABBBBCCCCDDDDEEEEFFFF        // AE_HEX_OVERFLOW
963    Local0 = 01111222233334444555566667777     // AE_OCTAL_OVERFLOW
964    Local0 = 11112222333344445555666677778888  // AE_DECIMAL_OVERFLOW
965
966iASL: Added a warning for the case where a ResourceTemplate is declared
967with no ResourceDescriptor entries (coded as "ResourceTemplate(){}"). In
968this case, the resulting template is created with a single END_TAG
969descriptor, which is essentially useless.
970
971iASL: Expanded the -vw option (ignore specific warnings/remarks) to
972include compilation error codes as well.
973
974----------------------------------------
97528 July 2017. Summary of changes for version 20170728:
976
977
9781) ACPICA kernel-resident subsystem:
979
980Fixed a regression seen with small resource descriptors that could cause
981an inadvertent AE_AML_NO_RESOURCE_END_TAG exception.
982
983AML interpreter: Implemented a new feature that allows forward references
984from individual named references within package objects that are
985contained within blocks of "module-level code". This provides
986compatibility with other ACPI implementations and supports existing
987firmware that depends on this feature. Example:
988
989    Name (ABCD, 1)
990    If (ABCD)                       /* An If() at module-level */
991    {
992        Name (PKG1, Package()
993        {
994            INT1                    /* Forward reference to object INT1
995*/
996        })
997        Name (INT1, 0x1234)
998    }
999
1000AML Interpreter: Fixed a problem with the Alias() operator where aliases
1001to some ASL objects were not handled properly. Objects affected are:
1002Mutex, Event, and OperationRegion.
1003
1004AML Debugger: Enhanced to properly handle AML Alias objects. These
1005objects have one level of indirection which was not fully supported by
1006the debugger.
1007
1008Table Manager: Added support to detect and ignore duplicate SSDTs within
1009the XSDT/RSDT. This error in the XSDT has been seen in the field.
1010
1011EFI and EDK2 support:
1012    Enabled /WX flag for MSVC builds
1013    Added support for AcpiOsStall, AcpiOsSleep, and AcpiOsGetTimer
1014    Added local support for 64-bit multiply and shift operations
1015    Added support to compile acpidump.efi on Windows
1016    Added OSL function stubs for interfaces not used under EFI
1017
1018Added additional support for the _DMA predefined name. _DMA returns a
1019buffer containing a resource template. This change add support within the
1020resource manager (AcpiWalkResourceBuffer) to walk and parse this list of
1021resource descriptors. Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
1022
1023
10242) iASL Compiler/Disassembler and Tools:
1025
1026iASL: Fixed a problem where the internal input line buffer(s) could
1027overflow if there are very long lines in the input ASL source code file.
1028Implemented buffer management that automatically increases the size of
1029the buffers as necessary.
1030
1031iASL: Added an option (-vx) to "expect" particular remarks, warnings and
1032errors. If the specified exception is not raised during compilation, the
1033compiler emits an error. This is intended to support the ASL test suite,
1034but may be useful in other contexts.
1035
1036iASL: Implemented a new predefined macro, __METHOD__, which returns a
1037string containing the name of the current control method that is being
1038compiled.
1039
1040iASL: Implemented debugger and table compiler support for the SDEI ACPI
1041table (Software Delegated Exception Interface). James Morse
1042<james.morse@arm.com>
1043
1044Unix/Linux makefiles: Added an option to disable compile optimizations.
1045The disable occurs when the NOOPT flag is set to TRUE.
1046theracermaster@gmail.com
1047
1048Acpidump: Added support for multiple DSDT and FACS tables. This can occur
1049when there are different tables for 32-bit versus 64-bit.
1050
1051Enhanced error reporting for the ASL test suite (ASLTS) by removing
1052unnecessary/verbose text, and emit the actual line number where an error
1053has occurred. These changes are intended to improve the usefulness of the
1054test suite.
1055
1056----------------------------------------
105729 June 2017. Summary of changes for version 20170629:
1058
1059
10601) ACPICA kernel-resident subsystem:
1061
1062Tables: Implemented a deferred ACPI table verification. This is useful
1063for operating systems where the tables cannot be verified in the early
1064initialization stage due to early memory mapping limitations on some
1065architectures. Lv Zheng.
1066
1067Tables: Removed the signature validation for dynamically loaded tables.
1068Provides compatibility with other ACPI implementations. Previously, only
1069SSDT tables were allowed, as per the ACPI specification. Now, any table
1070signature can be used via the Load() operator. Lv Zheng.
1071
1072Tables: Fixed several mutex issues that could cause errors during table
1073acquisition. Lv Zheng.
1074
1075Tables: Fixed a problem where an ACPI warning could be generated if a
1076null pointer was passed to the AcpiPutTable interface. Lv Zheng.
1077
1078Tables: Added a mechanism to handle imbalances for the AcpiGetTable and
1079AcpiPutTable interfaces. This applies to the "late stage" table loading
1080when the use of AcpiPutTable is no longer required (since the system
1081memory manager is fully running and available). Lv Zheng.
1082
1083Fixed/Reverted a regression during processing of resource descriptors
1084that contain only a single EndTag. Fixes an AE_AML_NO_RESOURCE_END_TAG
1085exception in this case.
1086
1087Headers: IORT/SMMU support: Updated the SMMU models for Revision C of the
1088I/O Remapping specification. Robin Murphy <robin.murphy@arm.com>
1089
1090Interpreter: Fixed a possible fault if an Alias operator with an invalid
1091or duplicate target is encountered during Alias creation in
1092AcpiExCreateAlias. Alex James <theracermaster@gmail.com>
1093
1094Added an option to use designated initializers for function pointers.
1095Kees Cook <keescook@google.com>
1096
1097
10982) iASL Compiler/Disassembler and Tools:
1099
1100iASL: Allow compilation of External declarations with target pathnames
1101that refer to existing named objects within the table. Erik Schmauss.
1102
1103iASL: Fixed a regression when compiling FieldUnits. Fixes an error if a
1104FieldUnit name also is declared via External in the same table. Erik
1105Schmauss.
1106
1107iASL: Allow existing scope names within pathnames used in External
1108statements. For example:
1109    External (ABCD.EFGH) // ABCD exists, but EFGH is truly external
1110    Device (ABCD)
1111
1112iASL: IORT ACPI table: Implemented changes required to decode the new
1113Proximity Domain for the SMMUv3 IORT. Disassembler and Data Table
1114compiler. Ganapatrao Kulkarni <ganapatrao.kulkarni@cavium.com>
1115
1116Disassembler: Don't abort disassembly on errors from External()
1117statements. Erik Schmauss.
1118
1119Disassembler: fixed a possible fault when one of the Create*Field
1120operators references a Resource Template. ACPICA Bugzilla 1396.
1121
1122iASL: In the source code, resolved some naming inconsistences across the
1123parsing support. Fixes confusion between "Parse Op" and "Parse Node".
1124Adds a new file, aslparseop.c
1125
1126----------------------------------------
112731 May 2017. Summary of changes for version 20170531:
1128
1129
11300) ACPI 6.2 support:
1131
1132The ACPI specification version 6.2 has been released and is available at
1133http://uefi.org/specifications
1134
1135This version of ACPICA fully supports the ACPI 6.2 specification. Changes
1136are summarized below.
1137
1138New ACPI tables (Table Compiler/Disassembler/Templates):
1139    HMAT (Heterogeneous Memory Attributes Table)
1140    WSMT (Windows SMM Security Mitigation Table)
1141    PPTT (Processor Properties Topology Table)
1142
1143New subtables for existing ACPI tables:
1144    HEST (New subtable, Arch-deferred machine check)
1145    SRAT (New subtable, Arch-specific affinity structure)
1146    PCCT (New subtables, Extended PCC subspaces (types 3 and 4))
1147
1148Simple updates for existing ACPI tables:
1149    BGRT (two new flag bits)
1150    HEST (New bit defined for several subtables, GHES_ASSIST)
1151
1152New Resource Descriptors and Resource macros (Compiler/Disassembler):
1153    PinConfig()
1154    PinFunction()
1155    PinGroup()
1156    PinGroupConfig()
1157    PinGroupFunction()
1158    New type for hardware error notification (section 18.3.2.9)
1159
1160New predefined names/methods (Compiler/Interpreter):
1161    _HMA (Heterogeneous Memory Attributes)
1162    _LSI (Label Storage Information)
1163    _LSR (Label Storage Read)
1164    _LSW (Label Storage Write)
1165
1166ASL grammar/macro changes (Compiler):
1167    For() ASL macro, implemented with the AML while operator
1168    Extensions to Concatenate operator
1169    Support for multiple definition blocks in same ASL file
1170    Clarification for Buffer operator
1171    Allow executable AML code underneath all scopes (Devices, etc.)
1172    Clarification/change for the _OSI return value
1173    ASL grammar update for reference operators
1174    Allow a zero-length string for AML filename in DefinitionBlock
1175
1176Miscellaneous:
1177    New device object notification value
1178    Remove a notify value (0x0C) for graceful shutdown
1179    New UUIDs for processor/cache properties and
1180        physical package property
1181    New _HID, ACPI0014 (Wireless Power Calibration Device)
1182
1183
11841) ACPICA kernel-resident subsystem:
1185
1186Added support to disable ACPI events on hardware-reduced platforms.
1187Eliminates error messages of the form "Could not enable fixed event". Lv
1188Zheng
1189
1190Fixed a problem using Device/Thermal objects with the ObjectType and
1191DerefOf ASL operators. This support had not been fully/properly
1192implemented.
1193
1194Fixed a problem where if a Buffer object containing a resource template
1195was longer than the actual resource template, an error was generated --
1196even though the AML is legal. This case has been seen in the field.
1197
1198Fixed a problem with the header definition of the MADT PCAT_COMPAT flag.
1199The values for DUAL_PIC and MULTIPLE_APIC were reversed.
1200
1201Added header file changes for the TPM2 ACPI table. Update to new version
1202of the TCG specification. Adds a new TPM2 subtable for ARM SMC.
1203
1204Exported the external interfaces AcpiAcquireMutex and AcpiReleaseMutex.
1205These interfaces are intended to be used only in conjunction with the
1206predefined _DLM method (Device Lock Method). "This object appears in a
1207device scope when AML access to the device must be synchronized with the
1208OS environment".
1209
1210Example Code and Data Size: These are the sizes for the OS-independent
1211acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1212debug version of the code includes the debug output trace mechanism and
1213has a much larger code and data size.
1214
1215  Current Release:
1216    Non-Debug Version: 143.1K Code, 60.0K Data, 203.1K Total
1217    Debug Version:     204.0K Code, 84.3K Data, 288.3K Total
1218  Previous Release:
1219    Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1220    Debug Version:     207.5K Code, 82.7K Data, 290.2K Total
1221
1222
12232) iASL Compiler/Disassembler and Tools:
1224
1225iASL: Fixed a problem where an External() declaration could not refer to
1226a Field Unit. Erik Schmauss.
1227
1228Disassembler: Improved support for the Switch/Case operators. This
1229feature will disassemble AML code back to the original Switch operators
1230when possible, instead of an If..Else sequence. David Box
1231
1232iASL and disassembler: Improved the handling of multiple extraneous
1233parentheses for both ASL input and disassembled ASL output.
1234
1235Improved the behavior of the iASL compiler and disassembler to detect
1236improper use of external declarations
1237
1238Disassembler: Now aborts immediately upon detection of an unknown AML
1239opcode. The AML parser has no real way to recover from this, and can
1240result in the creation of an ill-formed parse tree that causes errors
1241later during the disassembly.
1242
1243All tools: Fixed a problem where the Unix application OSL did not handle
1244control-c correctly. For example, a control-c could incorrectly wake the
1245debugger.
1246
1247AcpiExec: Improved the Control-C handling and added a handler for
1248segmentation faults (SIGSEGV). Supports both Windows and Unix-like
1249environments.
1250
1251Reduced the verbosity of the generic unix makefiles. Previously, each
1252compilation displayed the full set of compiler options. This has been
1253eliminated as the options are easily inspected within the makefiles. Each
1254compilation now results in a single line of output.
1255
1256----------------------------------------
125703 March 2017. Summary of changes for version 20170303:
1258
1259
12600) ACPICA licensing:
1261
1262The licensing information at the start of each source code module has
1263been updated. In addition to the Intel license, the dual GPLv2/BSD
1264license has been added for completeness. Now, a single version of the
1265source code should be suitable for all ACPICA customers. This is the
1266major change for this release since it affects all source code modules.
1267
1268
12691) ACPICA kernel-resident subsystem:
1270
1271Fixed two issues with the common asltypes.h header that could cause
1272problems in some environments: (Kim Jung-uk)
1273    Removed typedef for YY_BUFFER_STATE ?
1274       Fixes an error with earlier versions of Flex.
1275    Removed use of FILE typedef (which is only defined in stdio.h)
1276
1277
12782) iASL Compiler/Disassembler and Tools:
1279
1280Disassembler: fixed a regression introduced in 20170224. A fix for a
1281memory leak related to resource descriptor tags (names) could fault when
1282the disassembler was generated with 64-bit compilers.
1283
1284The ASLTS test suite has been updated to implement a new testing
1285architecture. During generation of the suite from ASL source, both the
1286ASL and ASL+ compilers are now validated, as well as the disassembler
1287itself (Erik Schmauss). The architecture executes as follows:
1288
1289    For every ASL source module:
1290        Compile (legacy ASL compilation)
1291        Disassemble the resulting AML to ASL+ source code
1292        Compile the new ASL+ module
1293        Perform a binary compare on the legacy AML and the new ASL+ AML
1294    The ASLTS suite then executes normally using the AML binaries.
1295
1296----------------------------------------
129724 February 2017. Summary of changes for version 20170224:
1298
1299
13001) ACPICA kernel-resident subsystem:
1301
1302Interpreter: Fixed two issues with the control method return value auto-
1303repair feature, where an attempt to double-delete an internal object
1304could result in an ACPICA warning (for _CID repair and others). No fault
1305occurs, however, because the attempted deletion (actually a release to an
1306internal cache) is detected and ignored via object poisoning.
1307
1308Debugger: Fixed an AML interpreter mutex issue during the single stepping
1309of control methods. If certain debugger commands are executed during
1310stepping, a mutex acquire/release error could occur. Lv Zheng.
1311
1312Fixed some issues generating ACPICA with the Intel C compiler by
1313restoring the original behavior and compiler-specific include file in
1314acenv.h. Lv Zheng.
1315
1316Example Code and Data Size: These are the sizes for the OS-independent
1317acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1318debug version of the code includes the debug output trace mechanism and
1319has a much larger code and data size.
1320
1321  Current Release:
1322    Non-Debug Version: 141.7K Code, 58.5K Data, 200.2K Total
1323    Debug Version:     207.5K Code, 82.7K Data, 290.2K Total
1324  Previous Release:
1325    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1326    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
1327
1328
13292) iASL Compiler/Disassembler and Tools:
1330
1331iASL/Disassembler: A preliminary version of a new ASL-to-ASL+ conversion
1332tool has been designed, implemented, and included in this release. The
1333key feature of this utility is that the original comments within the
1334input ASL file are preserved during the conversion process, and included
1335within the converted ASL+ file -- thus creating a transparent conversion
1336of existing ASL files to ASL+ (ASL 2.0). Erik Schmauss.
1337
1338    Usage: iasl -ca <ASL-filename>  // Output is a .dsl file with
1339converted code
1340
1341iASL/Disassembler: Improved the detection and correct disassembly of
1342Switch/Case operators. This feature detects sequences of if/elseif/else
1343operators that originated from ASL Switch/Case/Default operators and
1344emits the original operators. David Box.
1345
1346iASL: Improved the IORT ACPI table support in the following areas. Lv
1347Zheng:
1348    Clear MappingOffset if the MappingCount is zero.
1349    Fix the disassembly of the SMMU GSU interrupt offset.
1350    Update the template file for the IORT table.
1351
1352Disassembler: Enhanced the detection and disassembly of resource
1353template/descriptor within a Buffer object. An EndTag descriptor is now
1354required to have a zero second byte, since all known ASL compilers emit
1355this. This helps eliminate incorrect decisions when a buffer is
1356disassembled (false positives on resource templates).
1357
1358----------------------------------------
135919 January 2017. Summary of changes for version 20170119:
1360
1361
13621) General ACPICA software:
1363
1364Entire source code base: Added the 2017 copyright to all source code
1365legal/licensing module headers and utility/tool signons. This includes
1366the standard Linux dual-license header. This affects virtually every file
1367in the ACPICA core subsystem, iASL compiler, all ACPICA utilities, and
1368the ACPICA test suite.
1369
1370
13712) iASL Compiler/Disassembler and Tools:
1372
1373iASL: Removed/fixed an inadvertent remark when a method argument
1374containing a reference is used as a target operand within the method (and
1375never used as a simple argument), as in the example below. Jeffrey Hugo.
1376
1377    dsdt.asl   1507:    Store(0x1, Arg0)
1378    Remark   2146 -                ^ Method Argument is never used (Arg0)
1379
1380All tools: Removed the bit width of the compiler that generated the tool
1381from the common signon for all user space tools. This proved to be
1382confusing and unnecessary. This includes similar removal of HARDWARE_NAME
1383from the generic makefiles (Thomas Petazzoni). Example below.
1384
1385    Old:
1386    ASL+ Optimizing Compiler version 20170119-32
1387    ASL+ Optimizing Compiler version 20170119-64
1388
1389    New:
1390    ASL+ Optimizing Compiler version 20170119
1391
1392----------------------------------------
139322 December 2016. Summary of changes for version 20161222:
1394
1395
13961) ACPICA kernel-resident subsystem:
1397
1398AML Debugger: Implemented a new mechanism to simplify and enhance
1399debugger integration into all environments, including kernel debuggers
1400and user-space utilities, as well as remote debug services. This
1401mechanism essentially consists of new OSL interfaces to support debugger
1402initialization/termination, as well as wait/notify interfaces to perform
1403the debugger handshake with the host. Lv Zheng.
1404
1405    New OSL interfaces:
1406        AcpiOsInitializeDebugger (void)
1407        AcpiOsTerminateDebugger (void)
1408        AcpiOsWaitCommandReady (void)
1409        AcpiOsNotifyCommandComplete (void)
1410
1411    New OS services layer:
1412        osgendbg.c -- Example implementation, and used for AcpiExec
1413
1414Update for Generic Address Space (GAS) support: Although the AccessWidth
1415and/or BitOffset fields of the GAS are not often used, this change now
1416fully supports these fields. This affects the internal support for FADT
1417registers, registers in other ACPI data tables, and the AcpiRead and
1418AcpiWrite public interfaces. Lv Zheng.
1419
1420Sleep support: In order to simplify integration of ACPI sleep for the
1421various host operating systems, a new OSL interface has been introduced.
1422AcpiOsEnterSleep allows the host to perform any required operations
1423before the final write to the sleep control register(s) is performed by
1424ACPICA. Lv Zheng.
1425
1426    New OSL interface:
1427        AcpiOsEnterSleep(SleepState, RegisterAValue, RegisterBValue)
1428
1429    Called from these internal interfaces:
1430        AcpiHwLegacySleep
1431        AcpiHwExtendedSleep
1432
1433EFI support: Added a very small EFI/ACPICA example application. Provides
1434a simple demo for EFI integration, as well as assisting with resolution
1435of issues related to customer ACPICA/EFI integration. Lv Zheng. See:
1436
1437    source/tools/efihello/efihello.c
1438
1439Local C library: Implemented several new functions to enhance ACPICA
1440portability, for environments where these clib functions are not
1441available (such as EFI). Lv Zheng:
1442    putchar
1443    getchar
1444    strpbrk
1445    strtok
1446    memmove
1447
1448Fixed a regression where occasionally a valid resource descriptor was
1449incorrectly detected as invalid at runtime, and a
1450AE_AML_NO_RESOURCE_END_TAG was returned.
1451
1452Fixed a problem with the recently implemented support that enables
1453control method invocations as Target operands to many ASL operators.
1454Warnings of this form: "Needed type [Reference], found [Processor]" were
1455seen at runtime for some method invocations.
1456
1457Example Code and Data Size: These are the sizes for the OS-independent
1458acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1459debug version of the code includes the debug output trace mechanism and
1460has a much larger code and data size.
1461
1462  Current Release:
1463    Non-Debug Version: 141.5K Code, 58.5K Data, 200.0K Total
1464    Debug Version:     201.7K Code, 82.7K Data, 284.4K Total
1465  Previous Release:
1466    Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1467    Debug Version:     201.3K Code, 82.7K Data, 284.0K Total
1468
1469
14702) iASL Compiler/Disassembler and Tools:
1471
1472Disassembler: Enhanced output by adding the capability to detect and
1473disassemble ASL Switch/Case statements back to the original ASL source
1474code instead of if/else blocks. David Box.
1475
1476AcpiHelp: Split a large file into separate files based upon
1477functionality/purpose. New files are:
1478    ahaml.c
1479    ahasl.c
1480
1481----------------------------------------
148217 November 2016. Summary of changes for version 20161117:
1483
1484
14851) ACPICA kernel-resident subsystem:
1486
1487Table Manager: Fixed a regression introduced in 20160729, "FADT support
1488cleanup". This was an attempt to remove all references in the source to
1489the FADT version 2, which never was a legal version number. It was
1490skipped because it was an early version of 64-bit support that was
1491eventually abandoned for the current 64-bit support.
1492
1493Interpreter: Fixed a problem where runtime implicit conversion was
1494incorrectly disabled for the ASL operators below. This brings the
1495behavior into compliance with the ACPI specification:
1496    FromBCD
1497    ToBCD
1498    ToDecimalString
1499    ToHexString
1500    ToInteger
1501    ToBuffer
1502
1503Table Manager: Added a new public interface, AcpiPutTable, used to
1504release and free an ACPI table returned by AcpiGetTable and related
1505interfaces. Lv Zheng.
1506
1507Example Code and Data Size: These are the sizes for the OS-independent
1508acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1509debug version of the code includes the debug output trace mechanism and
1510has a much larger code and data size.
1511
1512  Current Release:
1513    Non-Debug Version: 140.5K Code, 58.5K Data, 198.9K Total
1514    Debug Version:     201.3K Code, 82.7K Data, 284.0K Total
1515  Previous Release:
1516    Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1517    Debug Version:     200.7K Code, 82.1K Data, 282.8K Total
1518
1519
15202) iASL Compiler/Disassembler and Tools:
1521
1522Disassembler: Fixed a regression for disassembly of Resource Template.
1523Detection of templates in the AML stream missed some types of templates.
1524
1525iASL: Fixed a problem where an Access Size error was returned for the PCC
1526address space when the AccessSize of the GAS register is greater than a
1527DWORD. Hoan Tran.
1528
1529iASL: Implemented several grammar changes for the operators below. These
1530changes are slated for the next version of the ACPI specification:
1531    RefOf        - Disallow method invocation as an operand
1532    CondRefOf    - Disallow method invocation as an operand
1533    DerefOf      - Disallow operands that use the result from operators
1534that
1535                   do not return a reference (Changed TermArg to
1536SuperName).
1537
1538iASL: Control method invocations are now allowed for Target operands, as
1539per the ACPI specification. Removed error for using a control method
1540invocation as a Target operand.
1541
1542Disassembler: Improved detection of Resource Templates, Unicode, and
1543Strings within Buffer objects. These subtypes do not contain a specific
1544opcode to indicate the originating ASL code, and they must be detected by
1545other means within the disassembler.
1546
1547iASL: Implemented an optimization improvement for 32-bit ACPI tables
1548(DSDT/SSDT). For the 32-bit case only, compute the optimum integer opcode
1549only after 64-bit to 32-bit truncation. A truncation warning message is
1550still emitted, however.
1551
1552AcpiXtract: Implemented handling for both types of line terminators (LF
1553or CR/LF) so that it can accept AcpiDump output files from any system.
1554Peter Wu.
1555
1556AcpiBin: Added two new options for comparing AML files:
1557    -a: compare and display ALL mismatches
1558    -o: start compare at this offset into the second file
1559
1560----------------------------------------
156130 September 2016. Summary of changes for version 20160930:
1562
1563
15641) ACPICA kernel-resident subsystem:
1565
1566Fixed a regression in the internal AcpiTbFindTable function where a non
1567AE_OK exception could inadvertently be returned even if the function did
1568not fail. This problem affects the following operators:
1569    DataTableRegion
1570    LoadTable
1571
1572Fixed a regression in the LoadTable operator where a load to any
1573namespace location other than the root no longer worked properly.
1574
1575Increased the maximum loop count value that will result in the
1576AE_AML_INFINITE_LOOP exception. This is a mechanism that is intended to
1577prevent infinite loops within the AML interpreter and thus the host OS
1578kernel. The value is increased from 0xFFFF to 0xFFFFF loops (65,535 to
15791,048,575).
1580
1581Moved the AcpiGbl_MaxLoopIterations configuration variable to the public
1582acpixf.h file. This allows hosts to easily configure the maximum loop
1583count at runtime.
1584
1585Removed an illegal character in the strtoul64.c file. This character
1586caused errors with some C compilers.
1587
1588Example Code and Data Size: These are the sizes for the OS-independent
1589acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1590debug version of the code includes the debug output trace mechanism and
1591has a much larger code and data size.
1592
1593  Current Release:
1594    Non-Debug Version: 140.4K Code, 58.1K Data, 198.5K Total
1595    Debug Version:     200.7K Code, 82.1K Data, 282.8K Total
1596  Previous Release:
1597    Non-Debug Version: 140.0K Code, 58.1K Data, 198.1K Total
1598    Debug Version:     200.3K Code, 82.1K Data, 282.4K Total
1599
1600
16012) iASL Compiler/Disassembler and Tools:
1602
1603Disassembler: Fixed a problem with the conversion of Else{If{ blocks into
1604the simpler ASL ElseIf keyword. During the conversion, a trailing If
1605block could be lost and missing from the disassembled output.
1606
1607iASL: Fixed a missing parser rule for the ObjectType operator. For ASL+,
1608the missing rule caused a parse error when using the Index operator as an
1609operand to ObjectType. This construct now compiles properly. Example:
1610    ObjectType(PKG1[4]).
1611
1612iASL: Correctly handle unresolved symbols in the hardware map file (-lm
1613option). Previously, unresolved symbols could cause a protection fault.
1614Such symbols are now marked as unresolved in the map file.
1615
1616iASL: Implemented support to allow control method invocations as an
1617operand to the ASL DeRefOf operator. Example:
1618    DeRefOf(MTH1(Local0))
1619
1620Disassembler: Improved support for the ToPLD ASL macro. Detection of a
1621possible _PLD buffer now includes examination of both the normal buffer
1622length (16 or 20) as well as the surrounding AML package length.
1623
1624Disassembler: Fixed a problem with the decoding of complex expressions
1625within the Divide operator for ASL+. For the case where both the quotient
1626and remainder targets are specified, the entire statement cannot be
1627disassembled. Previously, the output incorrectly contained a mix of ASL-
1628and ASL+ operators. This mixed statement causes a syntax error when
1629compiled. Example:
1630    Divide (Add (INT1, 6), 128, RSLT, QUOT)  // was incorrectly
1631disassembled to:
1632    Divide (INT1 + 6, 128, RSLT, QUOT)
1633
1634iASL/Tools: Added support to process AML and non-AML ACPI tables
1635consistently. For the disassembler and AcpiExec, allow all types of ACPI
1636tables (AML and data tables). For the iASL -e option, allow only AML
1637tables (DSDT/SSDT).
1638
1639----------------------------------------
164031 August 2016. Summary of changes for version 20160831:
1641
1642
16431) ACPICA kernel-resident subsystem:
1644
1645Improve support for the so-called "module-level code", which is defined
1646to be math, logical and control AML opcodes that appear outside of any
1647control method. This change improves the support by adding more opcodes
1648that can be executed in the manner. Some other issues have been solved,
1649and the ASL grammar changes to support such code under all scope
1650operators (Device, etc.) are complete. Lv Zheng.
1651
1652UEFI support: these OSL functions have been implemented. This is an
1653additional step toward supporting the AcpiExec utility natively (with
1654full hardware access) under UEFI. Marcelo Ferreira.
1655    AcpiOsReadPciConfiguration
1656    AcpiOsWritePciConfiguration
1657
1658Fixed a possible mutex error during control method auto-serialization. Lv
1659Zheng.
1660
1661Updated support for the Generic Address Structure by fully implementing
1662all GAS fields when a 32-bit address is expanded to a 64-bit GAS. Lv
1663Zheng.
1664
1665Updated the return value for the internal _OSI method. Instead of
16660xFFFFFFFF, the "Ones" value is now returned, which is 0xFFFFFFFFFFFFFFFF
1667for 64-bit ACPI tables. This fixes an incompatibility with other ACPI
1668implementations, and will be reflected and clarified in the next version
1669of the ACPI specification.
1670
1671Implemented two new table events that can be passed to an ACPICA table
1672handler. These events are used to indicate a table installation or
1673uninstallation. These events are used in addition to existed table load
1674and unload events. Lv Zheng.
1675
1676Implemented a cleanup for all internal string-to-integer conversions.
1677Consolidate multiple versions of this functionality and limit possible
1678bases to either 10 or 16 to simplify the code. Adds a new file,
1679utstrtoul64.
1680
1681Cleanup the inclusion order of the various compiler-specific headers.
1682This simplifies build configuration management. The compiler-specific
1683headers are now split out from the host-specific headers. Lv Zheng.
1684
1685Example Code and Data Size: These are the sizes for the OS-independent
1686acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1687debug version of the code includes the debug output trace mechanism and
1688has a much larger code and data size.
1689
1690  Current Release:
1691    Non-Debug Version: 140.1K Code, 58.1K Data, 198.1K Total
1692    Debug Version:     200.3K Code, 82.1K Data, 282.4K Total
1693
1694
16952) iASL Compiler/Disassembler and Tools:
1696
1697iASL/AcpiExec: Added a command line option to display the build date/time
1698of the tool (-vd). This can be useful to verify that the correct version
1699of the tools are being used.
1700
1701AML Debugger: Implemented a new subcommand ("execute predef") to execute
1702all predefined control methods and names within the current namespace.
1703This can be useful for debugging problems with ACPI tables and the ACPI
1704namespace.
1705
1706----------------------------------------
170729 July 2016. Summary of changes for version 20160729:
1708
1709
17101) ACPICA kernel-resident subsystem:
1711
1712Implemented basic UEFI support for the various ACPICA tools. This
1713includes:
17141) An OSL to implement the various AcpiOs* interfaces on UEFI.
17152) Support to obtain the ACPI tables on UEFI.
17163) Local implementation of required C library functions not available on
1717UEFI.
17184) A front-end (main) function for the tools for UEFI-related
1719initialization.
1720
1721The initial deployment of this support is the AcpiDump utility executing
1722as an UEFI application via EDK2 (EDKII, "UEFI Firmware Development Kit").
1723Current environments supported are Linux/Unix. MSVC generation is not
1724supported at this time. See the generate/efi/README file for build
1725instructions. Lv Zheng.
1726
1727Future plans include porting the AcpiExec utility to execute natively on
1728the platform with I/O and memory access. This will allow viewing/dump of
1729the platform namespace and native execution of ACPI control methods that
1730access the actual hardware. To fully implement this support, the OSL
1731functions below must be implemented with UEFI interfaces. Any community
1732help in the implementation of these functions would be appreciated:
1733    AcpiOsReadPort
1734    AcpiOsWritePort
1735    AcpiOsReadMemory
1736    AcpiOsWriteMemory
1737    AcpiOsReadPciConfiguration
1738    AcpiOsWritePciConfiguration
1739
1740Restructured and standardized the C library configuration for ACPICA,
1741resulting in the various configuration options below. This includes a
1742global restructuring of the compiler-dependent and platform-dependent
1743include files. These changes may affect the existing platform-dependent
1744configuration files on some hosts. Lv Zheng.
1745
1746The current C library configuration options appear below. For any issues,
1747it may be helpful to examine the existing compiler-dependent and
1748platform-dependent files as examples. Lv Zheng.
1749
17501) Linux kernel:
1751    ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1752library.
1753    ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
17542) Unix/Windows/BSD applications:
1755    ACPI_USE_STANDARD_HEADERS=y in order to use system-provided C
1756library.
1757    ACPI_USE_SYSTEM_CLIBRARY=y in order not to use ACPICA mini C library.
17583) UEFI applications:
1759    ACPI_USE_STANDARD_HEADERS=n in order not to use system-provided C
1760library.
1761    ACPI_USE_SYSTEM_CLIBRARY=n in order to use ACPICA mini C library.
17624) UEFI applications (EDK2/StdLib):
1763    ACPI_USE_STANDARD_HEADERS=y in order to use EDK2 StdLib C library.
1764    ACPI_USE_SYSTEM_CLIBRARY=y in order to use EDK2 StdLib C library.
1765
1766
1767AML interpreter: "module-level code" support. Allows for execution of so-
1768called "executable" AML code (math/logical operations, etc.) outside of
1769control methods not just at the module level (top level) but also within
1770any scope declared outside of a control method - Scope{}, Device{},
1771Processor{}, PowerResource{}, and ThermalZone{}. Lv Zheng.
1772
1773Simplified the configuration of the "maximum AML loops" global option by
1774adding a global public variable, "AcpiGbl_MaxLoopIterations" which can be
1775modified at runtime.
1776
1777
1778Example Code and Data Size: These are the sizes for the OS-independent
1779acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1780debug version of the code includes the debug output trace mechanism and
1781has a much larger code and data size.
1782
1783  Current Release:
1784    Non-Debug Version: 139.1K Code, 22.9K Data, 162.0K Total
1785    Debug Version:     199.0K Code, 81.8K Data, 280.8K Total
1786
1787
17882) iASL Compiler/Disassembler and Tools:
1789
1790iASL: Add full support for the RASF ACPI table (RAS Features Table).
1791Includes disassembler, data table compiler, and header support.
1792
1793iASL Expand "module-level code" support. Allows for
1794compilation/disassembly of so-called "executable" AML code (math/logical
1795operations, etc.) outside of control methods not just at the module level
1796(top level) but also within any scope declared outside of a control
1797method - Scope{}, Device{}, Processor{}, PowerResource{}, and
1798ThermalZone{}.
1799
1800AcpiDump: Added support for dumping all SSDTs on newer versions of
1801Windows. These tables are now easily available -- SSDTs are not available
1802through the registry on older versions.
1803
1804----------------------------------------
180527 May 2016. Summary of changes for version 20160527:
1806
1807
18081) ACPICA kernel-resident subsystem:
1809
1810Temporarily reverted the new arbitrary bit length/alignment support in
1811AcpiHwRead/AcpiHwWrite for the Generic Address Structure. There have been
1812a number of regressions with the new code that need to be fully resolved
1813and tested before this support can be finally integrated into ACPICA.
1814Apologies for any inconveniences these issues may have caused.
1815
1816The ACPI message macros are not configurable (ACPI_MSG_ERROR,
1817ACPI_MSG_EXCEPTION, ACPI_MSG_WARNING, ACPI_MSG_INFO, ACPI_MSG_BIOS_ERROR,
1818and ACPI_MSG_BIOS_WARNING). Lv Zheng.
1819
1820Fixed a couple of GCC warnings associated with the use of the -Wcast-qual
1821option. Adds a new return macro, return_STR. Junk-uk Kim.
1822
1823Example Code and Data Size: These are the sizes for the OS-independent
1824acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1825debug version of the code includes the debug output trace mechanism and
1826has a much larger code and data size.
1827
1828  Current Release:
1829    Non-Debug Version: 136.8K Code, 51.6K Data, 188.4K Total
1830    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
1831  Previous Release:
1832    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1833    Debug Version:     200.9K Code, 82.2K Data, 283.1K Total
1834
1835----------------------------------------
183622 April 2016. Summary of changes for version 20160422:
1837
18381) ACPICA kernel-resident subsystem:
1839
1840Fixed a regression in the GAS (generic address structure) arbitrary bit
1841support in AcpiHwRead/AcpiHwWrite. Problem could cause incorrect behavior
1842and incorrect return values. Lv Zheng. ACPICA BZ 1270.
1843
1844ACPI 6.0: Added support for new/renamed resource macros. One new argument
1845was added to each of these macros, and the original name has been
1846deprecated. The AML disassembler will always disassemble to the new
1847names. Support for the new macros was added to iASL, disassembler,
1848resource manager, and the acpihelp utility. ACPICA BZ 1274.
1849
1850    I2cSerialBus  -> I2cSerialBusV2
1851    SpiSerialBus  -> SpiSerialBusV2
1852    UartSerialBus -> UartSerialBusV2
1853
1854ACPI 6.0: Added support for a new integer field that was appended to the
1855package object returned by the _BIX method. This adds iASL compile-time
1856and AML runtime error checking. ACPICA BZ 1273.
1857
1858ACPI 6.1: Added support for a new PCCT subtable, "HW-Reduced Comm
1859Subspace Type2" (Headers, Disassembler, and data table compiler).
1860
1861Example Code and Data Size: These are the sizes for the OS-independent
1862acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1863debug version of the code includes the debug output trace mechanism and
1864has a much larger code and data size.
1865
1866  Current Release:
1867    Non-Debug Version: 137.4K Code, 52.6K Data, 190.0K Total
1868    Debug Version:     201.5K Code, 82.2K Data, 283.7K Total
1869  Previous Release:
1870    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1871    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
1872
1873
18742) iASL Compiler/Disassembler and Tools:
1875
1876iASL: Implemented an ASL grammar extension to allow/enable executable
1877"module-level code" to be created and executed under the various
1878operators that create new scopes. This type of AML code is already
1879supported in all known AML interpreters, and the grammar change will
1880appear in the next version of the ACPI specification. Simplifies the
1881conditional runtime creation of named objects under these object types:
1882
1883    Device
1884    PowerResource
1885    Processor
1886    Scope
1887    ThermalZone
1888
1889iASL: Implemented a new ASL extension, a "For" loop macro to add greater
1890ease-of-use to the ASL language. The syntax is similar to the
1891corresponding C operator, and is implemented with the existing AML While
1892opcode -- thus requiring no changes to existing AML interpreters.
1893
1894    For (Initialize, Predicate, Update) {TermList}
1895
1896Grammar:
1897    ForTerm :=
1898        For (
1899            Initializer    // Nothing | TermArg => ComputationalData
1900            Predicate      // Nothing | TermArg => ComputationalData
1901            Update         // Nothing | TermArg => ComputationalData
1902        ) {TermList}
1903
1904
1905iASL: The _HID/_ADR detection and validation has been enhanced to search
1906under conditionals in order to allow these objects to be conditionally
1907created at runtime.
1908
1909iASL: Fixed several issues with the constant folding feature. The
1910improvement allows better detection and resolution of statements that can
1911be folded at compile time. ACPICA BZ 1266.
1912
1913iASL/Disassembler: Fixed a couple issues with the Else{If{}...}
1914conversion to the ASL ElseIf operator where incorrect ASL code could be
1915generated.
1916
1917iASL/Disassembler: Fixed a problem with the ASL+ code disassembly where
1918sometimes an extra (and extraneous) set of parentheses were emitted for
1919some combinations of operators. Although this did not cause any problems
1920with recompilation of the disassembled code, it made the code more
1921difficult to read. David Box. ACPICA BZ 1231.
1922
1923iASL: Changed to ignore the unreferenced detection for predefined names
1924of resource descriptor elements, when the resource descriptor is
1925created/defined within a control method.
1926
1927iASL: Disassembler: Fix a possible fault with externally declared Buffer
1928objects.
1929
1930----------------------------------------
193118 March 2016. Summary of changes for version 20160318:
1932
19331) ACPICA kernel-resident subsystem:
1934
1935Added support for arbitrary bit lengths and bit offsets for registers
1936defined by the Generic Address Structure. Previously, only aligned bit
1937lengths of 8/16/32/64 were supported. This was sufficient for many years,
1938but recently some machines have been seen that require arbitrary bit-
1939level support. ACPICA BZ 1240. Lv Zheng.
1940
1941Fixed an issue where the \_SB._INI method sometimes must be evaluated
1942before any _REG methods are evaluated. Lv Zheng.
1943
1944Implemented several changes related to ACPI table support
1945(Headers/Disassembler/TableCompiler):
1946NFIT: For ACPI 6.1, updated to add some additional new fields and
1947constants.
1948FADT: Updated a warning message and set compliance to ACPI 6.1 (Version
19496).
1950DMAR: Added new constants per the 10/2014 DMAR spec.
1951IORT: Added new subtable per the 10/2015 IORT spec.
1952HEST: For ACPI 6.1, added new constants and new subtable.
1953DBG2: Added new constants per the 12/2015 DBG2 spec.
1954FPDT: Fixed several incorrect fields, add the FPDT boot record structure.
1955ACPICA BZ 1249.
1956ERST/EINJ: Updated disassembler with new "Execute Timings" actions.
1957
1958Updated header support for the DMAR table to match the current version of
1959the related spec.
1960
1961Added extensions to the ASL Concatenate operator to allow any ACPI object
1962to be passed as an operand. Any object other than Integer/String/Buffer
1963simply returns a string containing the object type. This extends the
1964usefulness of the Printf macros. Previously, Concatenate would abort the
1965control method if a non-data object was encountered.
1966
1967ACPICA source code: Deployed the C "const" keyword across the source code
1968where appropriate. ACPICA BZ 732. Joerg Sonnenberger (NetBSD).
1969
1970Example Code and Data Size: These are the sizes for the OS-independent
1971acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
1972debug version of the code includes the debug output trace mechanism and
1973has a much larger code and data size.
1974
1975  Current Release:
1976    Non-Debug Version: 137.1K Code, 51.5K Data, 188.6K Total
1977    Debug Version:     201.0K Code, 82.0K Data, 283.0K Total
1978  Previous Release:
1979    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
1980    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
1981
1982
19832) iASL Compiler/Disassembler and Tools:
1984
1985iASL/Disassembler: Improved the heuristic used to determine the number of
1986arguments for an externally defined control method (a method in another
1987table). Although this is an improvement, there is no deterministic way to
1988"guess" the number of method arguments. Only the ACPI 6.0 External opcode
1989will completely solve this problem as it is deployed (automatically) in
1990newer BIOS code.
1991
1992iASL/Disassembler: Fixed an ordering issue for emitted External() ASL
1993statements that could cause errors when the disassembled file is
1994compiled. ACPICA BZ 1243. David Box.
1995
1996iASL: Fixed a regression caused by the merger of the two versions of the
1997local strtoul64. Because of a dependency on a global variable, strtoul64
1998could return an error for integers greater than a 32-bit value. ACPICA BZ
19991260.
2000
2001iASL: Fixed a regression where a fault could occur for an ASL Return
2002statement if it invokes a control method that is not resolved. ACPICA BZ
20031264.
2004
2005AcpiXtract: Improved input file validation: detection of binary files and
2006non-acpidump text files.
2007
2008----------------------------------------
200912 February 2016. Summary of changes for version 20160212:
2010
20111) ACPICA kernel-resident subsystem:
2012
2013Implemented full support for the ACPI 6.1 specification (released in
2014January). This version of the specification is available at:
2015http://www.uefi.org/specifications
2016
2017Only a relatively small number of changes were required in ACPICA to
2018support ACPI 6.1, in these areas:
2019- New predefined names
2020- New _HID values
2021- A new subtable for HEST
2022- A few other header changes for new values
2023
2024Ensure \_SB_._INI is executed before any _REG methods are executed. There
2025appears to be existing BIOS code that relies on this behavior. Lv Zheng.
2026
2027Reverted a change made in version 20151218 which enabled method
2028invocations to be targets of various ASL operators (SuperName and Target
2029grammar elements). While the new behavior is supported by the ACPI
2030specification, other AML interpreters do not support this behavior and
2031never will. The ACPI specification will be updated for ACPI 6.2 to remove
2032this support. Therefore, the change was reverted to the original ACPICA
2033behavior.
2034
2035ACPICA now supports the GCC 6 compiler.
2036
2037Current Release: (Note: build changes increased sizes)
2038    Non-Debug Version: 136.2K Code, 51.5K Data, 187.7K Total
2039    Debug Version:     200.4K Code, 82.0K Data, 282.4K Total
2040Previous Release:
2041    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2042    Debug Version:     200.4K Code, 81.9K Data, 282.3K Total
2043
2044
20452) iASL Compiler/Disassembler and Tools:
2046
2047Completed full support for the ACPI 6.0 External() AML opcode. The
2048compiler emits an external AML opcode for each ASL External statement.
2049This opcode is used by the disassembler to assist with the disassembly of
2050external control methods by specifying the required number of arguments
2051for the method. AML interpreters do not use this opcode. To ensure that
2052interpreters do not even see the opcode, a block of one or more external
2053opcodes is surrounded by an "If(0)" construct. As this feature becomes
2054commonly deployed in BIOS code, the ability of disassemblers to correctly
2055disassemble AML code will be greatly improved. David Box.
2056
2057iASL: Implemented support for an optional cross-reference output file.
2058The -lx option will create a the cross-reference file with the suffix
2059"xrf". Three different types of cross-reference are created in this file:
2060- List of object references made from within each control method
2061- Invocation (caller) list for each user-defined control method
2062- List of references to each non-method object in the namespace
2063
2064iASL: Method invocations as ASL Target operands are now disallowed and
2065flagged as errors in preparation for ACPI 6.2 (see the description of the
2066problem above).
2067
2068----------------------------------------
20698 January 2016. Summary of changes for version 20160108:
2070
20711) ACPICA kernel-resident subsystem:
2072
2073Updated all ACPICA copyrights and signons to 2016: Added the 2016
2074copyright to all source code module headers and utility/tool signons.
2075This includes the standard Linux dual-license header. This affects
2076virtually every file in the ACPICA core subsystem, iASL compiler, all
2077ACPICA utilities, and the ACPICA test suite.
2078
2079Fixed a regression introduced in version 20151218 concerning the
2080execution of so-called module-level ASL/AML code. Namespace objects
2081created under a module-level If() construct were not properly/fully
2082entered into the namespace and could cause an interpreter fault when
2083accessed.
2084
2085Example Code and Data Size: These are the sizes for the OS-independent
2086acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2087debug version of the code includes the debug output trace mechanism and
2088has a much larger code and data size.
2089
2090Current Release:
2091    Non-Debug Version: 102.7K Code, 28.4K Data, 131.1K Total
2092    Debug Version:     200.4K Code, 81.9K Data, 282.4K Total
2093  Previous Release:
2094    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2095    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
2096
2097
20982) iASL Compiler/Disassembler and Tools:
2099
2100Fixed a problem with the compilation of the GpioIo and GpioInt resource
2101descriptors. The _PIN field name was incorrectly defined to be an array
2102of 32-bit values, but the _PIN values are in fact 16 bits each. This
2103would cause incorrect bit width warnings when using Word (16-bit) fields
2104to access the descriptors.
2105
2106
2107----------------------------------------
210818 December 2015. Summary of changes for version 20151218:
2109
21101) ACPICA kernel-resident subsystem:
2111
2112Implemented per-AML-table execution of "module-level code" as individual
2113ACPI tables are loaded into the namespace during ACPICA initialization.
2114In other words, any module-level code within an AML table is executed
2115immediately after the table is loaded, instead of batched and executed
2116after all of the tables have been loaded. This provides compatibility
2117with other ACPI implementations. ACPICA BZ 1219. Bob Moore, Lv Zheng,
2118David Box.
2119
2120To fully support the feature above, the default operation region handlers
2121for the SystemMemory, SystemIO, and PCI_Config address spaces are now
2122installed before any ACPI tables are loaded. This enables module-level
2123code to access these address spaces during the table load and module-
2124level code execution phase. ACPICA BZ 1220. Bob Moore, Lv Zheng, David
2125Box.
2126
2127Implemented several changes to the internal _REG support in conjunction
2128with the changes above. Also, changes to the AcpiExec/AcpiNames/Examples
2129utilities for the changes above. Although these tools were changed, host
2130operating systems that simply use the default handlers for SystemMemory,
2131SystemIO, and PCI_Config spaces should not require any update. Lv Zheng.
2132
2133For example, in the code below, DEV1 is conditionally added to the
2134namespace by the DSDT via module-level code that accesses an operation
2135region. The SSDT references DEV1 via the Scope operator. DEV1 must be
2136created immediately after the DSDT is loaded in order for the SSDT to
2137successfully reference DEV1. Previously, this code would cause an
2138AE_NOT_EXIST exception during the load of the SSDT. Now, this code is
2139fully supported by ACPICA.
2140
2141    DefinitionBlock ("", "DSDT", 2, "Intel", "DSDT1", 1)
2142    {
2143        OperationRegion (OPR1, SystemMemory, 0x400, 32)
2144        Field (OPR1, AnyAcc, NoLock, Preserve)
2145        {
2146            FLD1, 1
2147        }
2148        If (FLD1)
2149        {
2150            Device (\DEV1)
2151            {
2152            }
2153        }
2154    }
2155    DefinitionBlock ("", "SSDT", 2, "Intel", "SSDT1", 1)
2156    {
2157        External (\DEV1, DeviceObj)
2158        Scope (\DEV1)
2159        {
2160        }
2161    }
2162
2163Fixed an AML interpreter problem where control method invocations were
2164not handled correctly when the invocation was itself a SuperName argument
2165to another ASL operator. In these cases, the method was not invoked.
2166ACPICA BZ 1002. Affects the following ASL operators that have a SuperName
2167argument:
2168    Store
2169    Acquire, Wait
2170    CondRefOf, RefOf
2171    Decrement, Increment
2172    Load, Unload
2173    Notify
2174    Signal, Release, Reset
2175    SizeOf
2176
2177Implemented automatic String-to-ObjectReference conversion support for
2178packages returned by predefined names (such as _DEP). A common BIOS error
2179is to add double quotes around an ObjectReference namepath, which turns
2180the reference into an unexpected string object. This support detects the
2181problem and corrects it before the package is returned to the caller that
2182invoked the method. Lv Zheng.
2183
2184Implemented extensions to the Concatenate operator. Concatenate now
2185accepts any type of object, it is not restricted to simply
2186Integer/String/Buffer. For objects other than these 3 basic data types,
2187the argument is treated as a string containing the name of the object
2188type. This expands the utility of Concatenate and the Printf/Fprintf
2189macros. ACPICA BZ 1222.
2190
2191Cleaned up the output of the ASL Debug object. The timer() value is now
2192optional and no longer emitted by default. Also, the basic data types of
2193Integer/String/Buffer are simply emitted as their values, without a data
2194type string -- since the data type is obvious from the output. ACPICA BZ
21951221.
2196
2197Example Code and Data Size: These are the sizes for the OS-independent
2198acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2199debug version of the code includes the debug output trace mechanism and
2200has a much larger code and data size.
2201
2202  Current Release:
2203    Non-Debug Version: 102.6K Code, 28.4K Data, 131.0K Total
2204    Debug Version:     200.3K Code, 81.9K Data, 282.3K Total
2205  Previous Release:
2206    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2207    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
2208
2209
22102) iASL Compiler/Disassembler and Tools:
2211
2212iASL: Fixed some issues with the ASL Include() operator. This operator
2213was incorrectly defined in the iASL parser rules, causing a new scope to
2214be opened for the code within the include file. This could lead to
2215several issues, including allowing ASL code that is technically illegal
2216and not supported by AML interpreters. Note, this does not affect the
2217related #include preprocessor operator. ACPICA BZ 1212.
2218
2219iASL/Disassembler: Implemented support for the ASL ElseIf operator. This
2220operator is essentially an ASL macro since there is no AML opcode
2221associated with it. The code emitted by the iASL compiler for ElseIf is
2222an Else opcode followed immediately by an If opcode. The disassembler
2223will now emit an ElseIf if it finds an Else immediately followed by an
2224If. This simplifies the decoded ASL, especially for deeply nested
2225If..Else and large Switch constructs. Thus, the disassembled code more
2226closely follows the original source ASL. ACPICA BZ 1211. Example:
2227
2228    Old disassembly:
2229        Else
2230        {
2231            If (Arg0 == 0x02)
2232            {
2233                Local0 = 0x05
2234            }
2235        }
2236
2237    New disassembly:
2238        ElseIf (Arg0 == 0x02)
2239        {
2240            Local0 = 0x05
2241        }
2242
2243AcpiExec: Added support for the new module level code behavior and the
2244early region installation. This required a small change to the
2245initialization, since AcpiExec must install its own operation region
2246handlers.
2247
2248AcpiExec: Added support to make the debug object timer optional. Default
2249is timer disabled. This cleans up the debug object output -- the timer
2250data is rarely used.
2251
2252AcpiExec: Multiple ACPI tables are now loaded in the order that they
2253appear on the command line. This can be important when there are
2254interdependencies/references between the tables.
2255
2256iASL/Templates. Add support to generate template files with multiple
2257SSDTs within a single output file. Also added ommand line support to
2258specify the number of SSDTs (in addition to a single DSDT). ACPICA BZ
22591223, 1225.
2260
2261
2262----------------------------------------
226324 November 2015. Summary of changes for version 20151124:
2264
22651) ACPICA kernel-resident subsystem:
2266
2267Fixed a possible regression for a previous update to FADT handling. The
2268FADT no longer has a fixed table ID, causing some issues with code that
2269was hardwired to a specific ID. Lv Zheng.
2270
2271Fixed a problem where the method auto-serialization could interfere with
2272the current SyncLevel. This change makes the auto-serialization support
2273transparent to the SyncLevel support and management.
2274
2275Removed support for the _SUB predefined name in AcpiGetObjectInfo. This
2276interface is intended for early access to the namespace during the
2277initial namespace device discovery walk. The _SUB method has been seen to
2278access operation regions in some cases, causing errors because the
2279operation regions are not fully initialized.
2280
2281AML Debugger: Fixed some issues with the terminate/quit/exit commands
2282that can cause faults. Lv Zheng.
2283
2284AML Debugger: Add thread ID support so that single-step mode only applies
2285to the AML Debugger thread. This prevents runtime errors within some
2286kernels. Lv Zheng.
2287
2288Eliminated extraneous warnings from AcpiGetSleepTypeData. Since the _Sx
2289methods that are invoked by this interface are optional, removed warnings
2290emitted for the case where one or more of these methods do not exist.
2291ACPICA BZ 1208, original change by Prarit Bhargava.
2292
2293Made a major pass through the entire ACPICA source code base to
2294standardize formatting that has diverged a bit over time. There are no
2295functional changes, but this will of course cause quite a few code
2296differences from the previous ACPICA release.
2297
2298Example Code and Data Size: These are the sizes for the OS-independent
2299acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2300debug version of the code includes the debug output trace mechanism and
2301has a much larger code and data size.
2302
2303  Current Release:
2304    Non-Debug Version: 102.0K Code, 28.3K Data, 130.3K Total
2305    Debug Version:     199.6K Code, 81.8K Data, 281.4K Total
2306  Previous Release:
2307    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2308    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
2309
2310
23112) iASL Compiler/Disassembler and Tools:
2312
2313iASL/acpiexec/acpixtract/disassembler: Added support to allow multiple
2314definition blocks within a single ASL file and the resulting AML file.
2315Support for this type of file was also added to the various tools that
2316use binary AML files: acpiexec, acpixtract, and the AML disassembler. The
2317example code below shows two definition blocks within the same file:
2318
2319    DefinitionBlock ("dsdt.aml", "DSDT", 2, "Intel", "Template",
23200x12345678)
2321    {
2322    }
2323    DefinitionBlock ("", "SSDT", 2, "Intel", "Template", 0xABCDEF01)
2324    {
2325    }
2326
2327iASL: Enhanced typechecking for the Name() operator. All expressions for
2328the value of the named object must be reduced/folded to a single constant
2329at compile time, as per the ACPI specification (the AML definition of
2330Name()).
2331
2332iASL: Fixed some code indentation issues for the -ic and -ia options (C
2333and assembly headers). Now all emitted code correctly begins in column 1.
2334
2335iASL: Added an error message for an attempt to open a Scope() on an
2336object defined in an SSDT. The DSDT is always loaded into the namespace
2337first, so any attempt to open a Scope on an SSDT object will fail at
2338runtime.
2339
2340
2341----------------------------------------
234230 September 2015. Summary of changes for version 20150930:
2343
23441) ACPICA kernel-resident subsystem:
2345
2346Debugger: Implemented several changes and bug fixes to assist support for
2347the in-kernel version of the AML debugger. Lv Zheng.
2348- Fix the "predefined" command for in-kernel debugger.
2349- Do not enter debug command loop for the help and version commands.
2350- Disallow "execute" command during execution/single-step of a method.
2351
2352Interpreter: Updated runtime typechecking for all operators that have
2353target operands. The operand is resolved and validated that it is legal.
2354For example, the target cannot be a non-data object such as a Device,
2355Mutex, ThermalZone, etc., as per the ACPI specification.
2356
2357Debugger: Fixed the double-mutex user I/O handshake to work when local
2358deadlock detection is enabled.
2359
2360Debugger: limited display of method locals and arguments (LocalX and
2361ArgX) to only those that have actually been initialized. This prevents
2362lines of extraneous output.
2363
2364Updated the definition of the NFIT table to correct the bit polarity of
2365one flag: ACPI_NFIT_MEM_ARMED --> ACPI_NFIT_MEM_NOT_ARMED
2366
2367Example Code and Data Size: These are the sizes for the OS-independent
2368acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2369debug version of the code includes the debug output trace mechanism and
2370has a much larger code and data size.
2371
2372  Current Release:
2373    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2374    Debug Version:     199.3K Code, 81.4K Data, 280.7K Total
2375  Previous Release:
2376    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2377    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
2378
2379
23802) iASL Compiler/Disassembler and Tools:
2381
2382iASL: Improved the compile-time typechecking for operands of many of the
2383ASL operators:
2384
2385-- Added an option to disable compiler operand/operator typechecking (-
2386ot).
2387
2388-- For the following operators, the TermArg operands are now validated
2389when possible to be Integer data objects: BankField, OperationRegion,
2390DataTableRegion, Buffer, and Package.
2391
2392-- Store (Source, Target): Both the source and target operands are
2393resolved and checked that the operands are both legal. For example,
2394neither operand can be a non-data object such as a Device, Mutex,
2395ThermalZone, etc. Note, as per the ACPI specification, the CopyObject
2396operator can be used to store an object to any type of target object.
2397
2398-- Store (Source, Target): If the source is a Package object, the target
2399must be a Package object, LocalX, ArgX, or Debug. Likewise, if the target
2400is a Package, the source must also be a Package.
2401
2402-- Store (Source, Target): A warning is issued if the source and target
2403resolve to the identical named object.
2404
2405-- Store (Source, <method invocation>): An error is generated for the
2406target method invocation, as this construct is not supported by the AML
2407interpreter.
2408
2409-- For all ASL math and logic operators, the target operand must be a
2410data object (Integer, String, Buffer, LocalX, ArgX, or Debug). This
2411includes the function return value also.
2412
2413-- External declarations are also included in the typechecking where
2414possible. External objects defined using the UnknownObj keyword cannot be
2415typechecked, however.
2416
2417iASL and Disassembler: Added symbolic (ASL+) support for the ASL Index
2418operator:
2419- Legacy code: Index(PKG1, 3)
2420- New ASL+ code: PKG1[3]
2421This completes the ACPI 6.0 ASL+ support as it was the only operator not
2422supported.
2423
2424iASL: Fixed the file suffix for the preprocessor output file (.i). Two
2425spaces were inadvertently appended to the filename, causing file access
2426and deletion problems on some systems.
2427
2428ASL Test Suite (ASLTS): Updated the master makefile to generate all
2429possible compiler output files when building the test suite -- thus
2430exercising these features of the compiler. These files are automatically
2431deleted when the test suite exits.
2432
2433
2434----------------------------------------
243518 August 2015. Summary of changes for version 20150818:
2436
24371) ACPICA kernel-resident subsystem:
2438
2439Fix a regression for AcpiGetTableByIndex interface causing it to fail. Lv
2440Zheng. ACPICA BZ 1186.
2441
2442Completed development to ensure that the ACPICA Disassembler and Debugger
2443are fully standalone components of ACPICA. Removed cross-component
2444dependences. Lv Zheng.
2445
2446The max-number-of-AML-loops is now runtime configurable (previously was
2447compile-time only). This is essentially a loop timeout to force-abort
2448infinite AML loops. ACPCIA BZ 1192.
2449
2450Debugger: Cleanup output to dump ACPI names and namepaths without any
2451trailing underscores. Lv Zheng. ACPICA BZ 1135.
2452
2453Removed unnecessary conditional compilations across the Debugger and
2454Disassembler components where entire modules could be left uncompiled.
2455
2456The aapits test is deprecated and has been removed from the ACPICA git
2457tree. The test has never been completed and has not been maintained, thus
2458becoming rather useless. ACPICA BZ 1015, 794.
2459
2460A batch of small changes to close bugzilla and other reports:
2461- Remove duplicate code for _PLD processing. ACPICA BZ 1176.
2462- Correctly cleanup after a ACPI table load failure. ACPICA BZ 1185.
2463- iASL: Support POSIX yacc again in makefile. Jung-uk Kim.
2464- ACPI table support: general cleanup and simplification. Lv Zheng, Bob
2465Moore.
2466- ACPI table support: fix for a buffer read overrun in AcpiTbFindTable.
2467ACPICA BZ 1184.
2468- Enhance parameter validation for DataTableRegion and LoadTable ASL/AML
2469operators.
2470- Debugger: Split debugger initialization/termination interfaces. Lv
2471Zheng.
2472- AcpiExec: Emit OemTableId for SSDTs during the load phase for table
2473identification.
2474- AcpiExec: Add debug message during _REG method phase during table
2475load/init.
2476- AcpiNames: Fix a regression where some output was missing and no longer
2477emitted.
2478- Debugger: General cleanup and simplification. Lv Zheng.
2479- Disassembler: Cleanup use of several global option variables. Lv Zheng.
2480
2481Example Code and Data Size: These are the sizes for the OS-independent
2482acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2483debug version of the code includes the debug output trace mechanism and
2484has a much larger code and data size.
2485
2486  Current Release:
2487    Non-Debug Version: 101.3K Code, 27.7K Data, 129.0K Total
2488    Debug Version:     198.6K Code, 80.9K Data, 279.5K Total
2489  Previous Release:
2490    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2491    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
2492
2493
24942) iASL Compiler/Disassembler and Tools:
2495
2496AcpiExec: Fixed a problem where any more than 32 ACPI tables in the XSDT
2497were not handled properly and caused load errors. Now, properly invoke
2498and use the ACPICA auto-reallocate mechanism for ACPI table data
2499structures. ACPICA BZ 1188
2500
2501AcpiNames: Add command-line wildcard support for ACPI table files. ACPICA
2502BZ 1190.
2503
2504AcpiExec and AcpiNames: Add -l option to load ACPI tables only. For
2505AcpiExec, this means that no control methods (like _REG/_INI/_STA) are
2506executed during initialization. ACPICA BZ 1187, 1189.
2507
2508iASL/Disassembler: Implemented a prototype "listing" mode that emits AML
2509that corresponds to each disassembled ASL statement, to simplify
2510debugging. ACPICA BZ 1191.
2511
2512Debugger: Add option to the "objects" command to display a summary of the
2513current namespace objects (Object type and count). This is displayed if
2514the command is entered with no arguments.
2515
2516AcpiNames: Add -x option to specify debug level, similar to AcpiExec.
2517
2518
2519----------------------------------------
252017 July 2015. Summary of changes for version 20150717:
2521
25221) ACPICA kernel-resident subsystem:
2523
2524Improved the partitioning between the Debugger and Disassembler
2525components. This allows the Debugger to be used standalone within kernel
2526code without the Disassembler (which is used for single stepping also).
2527This renames and moves one file, dmobject.c to dbobject.c. Lv Zheng.
2528
2529Debugger: Implemented a new command to trace the execution of control
2530methods (Trace). This is especially useful for the in-kernel version of
2531the debugger when file I/O may not be available for method trace output.
2532See the ACPICA reference for more information. Lv Zheng.
2533
2534Moved all C library prototypes (used for the local versions of these
2535functions when requested) to a new header, acclib.h
2536Cleaned up the use of non-ANSI C library functions. These functions are
2537implemented locally in ACPICA. Moved all such functions to a common
2538source file, utnonansi.c
2539
2540Debugger: Fixed a problem with the "!!" command (get last command
2541executed) where the debugger could enter an infinite loop and eventually
2542crash.
2543
2544Removed the use of local macros that were used for some of the standard C
2545library functions to automatically cast input parameters. This mostly
2546affected the is* functions where the input parameter is defined to be an
2547int. This required a few modifications to the main ACPICA source code to
2548provide casting for these functions and eliminate possible compiler
2549warnings for these parameters.
2550
2551Across the source code, added additional status/error checking to resolve
2552issues discovered by static source code analysis tools such as Coverity.
2553
2554Example Code and Data Size: These are the sizes for the OS-independent
2555acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2556debug version of the code includes the debug output trace mechanism and
2557has a much larger code and data size.
2558
2559  Current Release:
2560    Non-Debug Version: 100.9K Code, 24.5K Data, 125.4K Total
2561    Debug Version:     197.8K Code, 81.5K Data, 279.3K Total
2562  Previous Release:
2563    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2564    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
2565
2566
25672) iASL Compiler/Disassembler and Tools:
2568
2569iASL: Fixed a regression where the device map file feature no longer
2570worked properly when used in conjunction with the disassembler. It only
2571worked properly with the compiler itself.
2572
2573iASL: Implemented a new warning for method LocalX variables that are set
2574but never used (similar to a C compiler such as gcc). This also applies
2575to ArgX variables that are not defined by the parent method, and are
2576instead (legally) used as local variables.
2577
2578iASL/Preprocessor: Finished the pass-through of line numbers from the
2579preprocessor to the compiler. This ensures that compiler errors/warnings
2580have the correct original line numbers and filenames, regardless of any
2581#include files.
2582
2583iASL/Preprocessor: Fixed a couple of issues with comment handling and the
2584pass-through of comments to the preprocessor output file (which becomes
2585the compiler input file). Also fixed a problem with // comments that
2586appear after a math expression.
2587
2588iASL: Added support for the TCPA server table to the table compiler and
2589template generator. (The client table was already previously supported)
2590
2591iASL/Preprocessor: Added a permanent #define of the symbol "__IASL__" to
2592identify the iASL compiler.
2593
2594Cleaned up the use of the macros NEGATIVE and POSITIVE which were defined
2595multiple times. The new names are ACPI_SIGN_NEGATIVE and
2596ACPI_SIGN_POSITIVE.
2597
2598AcpiHelp: Update to expand help messages for the iASL preprocessor
2599directives.
2600
2601
2602----------------------------------------
260319 June 2015. Summary of changes for version 20150619:
2604
2605Two regressions in version 20150616 have been addressed:
2606
2607Fixes some problems/issues with the C library macro removal (ACPI_STRLEN,
2608etc.) This update changes ACPICA to only use the standard headers for
2609functions, or the prototypes for the local versions of the C library
2610functions. Across the source code, this required some additional casts
2611for some Clib invocations for portability. Moved all local prototypes to
2612a new file, acclib.h
2613
2614Fixes several problems with recent changes to the handling of the FACS
2615table that could cause some systems not to boot.
2616
2617
2618----------------------------------------
261916 June 2015. Summary of changes for version 20150616:
2620
2621
26221) ACPICA kernel-resident subsystem:
2623
2624Across the entire ACPICA source code base, the various macros for the C
2625library functions (such as ACPI_STRLEN, etc.) have been removed and
2626replaced by the standard C library names (strlen, etc.) The original
2627purpose for these macros is no longer applicable. This simplification
2628reduces the number of macros used in the ACPICA source code
2629significantly, improving readability and maintainability.
2630
2631Implemented support for a new ACPI table, the OSDT. This table, the
2632"override" SDT, can be loaded directly by the host OS at boot time. It
2633enables the replacement of existing namespace objects that were installed
2634via the DSDT and/or SSDTs. The primary purpose for this is to replace
2635buggy or incorrect ASL/AML code obtained via the BIOS. The OSDT is slated
2636for inclusion in a future version of the ACPI Specification. Lv Zheng/Bob
2637Moore.
2638
2639Added support for systems with (improperly) two FACS tables -- a "32-bit"
2640table (via FADT 32-bit legacy field) and a "64-bit" table (via the 64-bit
2641X field). This change will support both automatically. There continues to
2642be systems found with this issue. This support requires a change to the
2643AcpiSetFirmwareWakingVector interface. Also, a public global variable has
2644been added to allow the host to select which FACS is desired
2645(AcpiGbl_Use32BitFacsAddresses). See the ACPICA reference for more
2646details Lv Zheng.
2647
2648Added a new feature to allow for systems that do not contain an FACS.
2649Although this is already supported on hardware-reduced platforms, the
2650feature has been extended for all platforms. The reasoning is that we do
2651not want to abort the entire ACPICA initialization just because the
2652system is seriously buggy and has no FACS.
2653
2654Fixed a problem where the GUID strings for NFIT tables (in acuuid.h) were
2655not correctly transcribed from the ACPI specification in ACPICA version
265620150515.
2657
2658Implemented support for the _CLS object in the AcpiGetObjectInfo external
2659interface.
2660
2661Updated the definitions of the TCPA and TPM2 ACPI tables to the more
2662recent TCG ACPI Specification, December 14, 2014. Table disassembler and
2663compiler also updated. Note: The TCPA "server" table is not supported by
2664the disassembler/table-compiler at this time.
2665
2666ACPI 6.0: Added definitions for the new GIC version field in the MADT.
2667
2668Example Code and Data Size: These are the sizes for the OS-independent
2669acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2670debug version of the code includes the debug output trace mechanism and
2671has a much larger code and data size.
2672
2673  Current Release:
2674    Non-Debug Version: 100.6K Code, 27.6K Data, 128.2K Total
2675    Debug Version:     196.2K Code, 81.0K Data, 277.2K Total
2676  Previous Release:
2677    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
2678    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
2679
2680
26812) iASL Compiler/Disassembler and Tools:
2682
2683Disassembler: Fixed a problem with the new symbolic operator disassembler
2684where incorrect ASL code could be emitted in some cases for the "non-
2685commutative" operators -- Subtract, Divide, Modulo, ShiftLeft, and
2686ShiftRight. The actual problem cases seem to be rather unusual in common
2687ASL code, however. David Box.
2688
2689Modified the linux version of acpidump to obtain ACPI tables from not
2690just /dev/mem (which may not exist) and /sys/firmware/acpi/tables. Lv
2691Zheng.
2692
2693iASL: Fixed a problem where the user preprocessor output file (.i)
2694contained extra data that was not expected. The compiler was using this
2695file as a temporary file and passed through #line directives in order to
2696keep compiler error messages in sync with the input file and line number
2697across multiple include files. The (.i) is no longer a temporary file as
2698the compiler uses a new, different file for the original purpose.
2699
2700iASL: Fixed a problem where comments within the original ASL source code
2701file were not passed through to the preprocessor output file, nor any
2702listing files.
2703
2704iASL: Fixed some issues for the handling of the "#include" preprocessor
2705directive and the similar (but not the same) "Include" ASL operator.
2706
2707iASL: Add support for the new OSDT in both the disassembler and compiler.
2708
2709iASL: Fixed a problem with the constant folding support where a Buffer
2710object could be incorrectly generated (incorrectly formed) during a
2711conversion to a Store() operator.
2712
2713AcpiHelp: Updated for new NFIT GUIDs, "External" AML opcode, and new
2714description text for the _REV predefined name. _REV now permanently
2715returns 2, as per the ACPI 6.0 specification.
2716
2717Debugger: Enhanced the output of the Debug ASL object for references
2718produced by the Index operator. For Buffers and strings, only output the
2719actual byte pointed to by the index. For packages, only print the single
2720package element decoded by the index. Previously, the entire
2721buffer/string/package was emitted.
2722
2723iASL/Table-compiler: Fixed a regression where the "generic" data types
2724were no longer recognized, causing errors.
2725
2726
2727----------------------------------------
272815 May 2015. Summary of changes for version 20150515:
2729
2730This release implements most of ACPI 6.0 as described below.
2731
27321) ACPICA kernel-resident subsystem:
2733
2734Implemented runtime argument checking and return value checking for all
2735new ACPI 6.0 predefined names. This includes: _BTH, _CR3, _DSD, _LPI,
2736_MTL, _PRR, _RDI, _RST, _TFP, _TSN.
2737
2738Example Code and Data Size: These are the sizes for the OS-independent
2739acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
2740debug version of the code includes the debug output trace mechanism and
2741has a much larger code and data size.
2742
2743  Current Release:
2744    Non-Debug Version:  99.9K Code, 27.5K Data, 127.4K Total
2745    Debug Version:     195.2K Code, 80.8K Data, 276.0K Total
2746  Previous Release:
2747    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
2748    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
2749
2750
27512) iASL Compiler/Disassembler and Tools:
2752
2753iASL compiler: Added compile-time support for all new ACPI 6.0 predefined
2754names (argument count validation and return value typechecking.)
2755
2756iASL disassembler and table compiler: implemented support for all new
2757ACPI 6.0 tables. This includes: DRTM, IORT, LPIT, NFIT, STAO, WPBT, XENV.
2758
2759iASL disassembler and table compiler: Added ACPI 6.0 changes to existing
2760tables: FADT, MADT.
2761
2762iASL preprocessor: Added a new directive to enable inclusion of binary
2763blobs into ASL code. The new directive is #includebuffer. It takes a
2764binary file as input and emits a named ascii buffer object into the ASL
2765code.
2766
2767AcpiHelp: Added support for all new ACPI 6.0 predefined names.
2768
2769AcpiHelp: Added a new option, -d, to display all iASL preprocessor
2770directives.
2771
2772AcpiHelp: Added a new option, -t, to display all known/supported ACPI
2773tables.
2774
2775
2776----------------------------------------
277710 April 2015. Summary of changes for version 20150410:
2778
2779Reverted a change introduced in version 20150408 that caused
2780a regression in the disassembler where incorrect operator
2781symbols could be emitted.
2782
2783
2784----------------------------------------
278508 April 2015. Summary of changes for version 20150408:
2786
2787
27881) ACPICA kernel-resident subsystem:
2789
2790Permanently set the return value for the _REV predefined name. It now
2791returns 2 (was 5). This matches other ACPI implementations. _REV will be
2792deprecated in the future, and is now defined to be 1 for ACPI 1.0, and 2
2793for ACPI 2.0 and later. It should never be used to differentiate or
2794identify operating systems.
2795
2796Added the "Windows 2015" string to the _OSI support. ACPICA will now
2797return TRUE to a query with this string.
2798
2799Fixed several issues with the local version of the printf function.
2800
2801Added the C99 compiler option (-std=c99) to the Unix makefiles.
2802
2803  Current Release:
2804    Non-Debug Version:  99.9K Code, 27.4K Data, 127.3K Total
2805    Debug Version:     195.2K Code, 80.7K Data, 275.9K Total
2806  Previous Release:
2807    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
2808    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
2809
2810
28112) iASL Compiler/Disassembler and Tools:
2812
2813iASL: Implemented an enhancement to the constant folding feature to
2814transform the parse tree to a simple Store operation whenever possible:
2815    Add (2, 3, X) ==> is converted to: Store (5, X)
2816    X = 2 + 3     ==> is converted to: Store (5, X)
2817
2818Updated support for the SLIC table (Software Licensing Description Table)
2819in both the Data Table compiler and the disassembler. The SLIC table
2820support now conforms to "Microsoft Software Licensing Tables (SLIC and
2821MSDM). November 29, 2011. Copyright 2011 Microsoft". Note: Any SLIC data
2822following the ACPI header is now defined to be "Proprietary Data", and as
2823such, can only be entered or displayed as a hex data block.
2824
2825Implemented full support for the MSDM table as described in the document
2826above. Note: The format of MSDM is similar to SLIC. Any MSDM data
2827following the ACPI header is defined to be "Proprietary Data", and can
2828only be entered or displayed as a hex data block.
2829
2830Implemented the -Pn option for the iASL Table Compiler (was only
2831implemented for the ASL compiler). This option disables the iASL
2832preprocessor.
2833
2834Disassembler: For disassembly of Data Tables, added a comment field
2835around the Ascii equivalent data that is emitted as part of the "Raw
2836Table Data" block. This prevents the iASL Preprocessor from possible
2837confusion if/when the table is compiled.
2838
2839Disassembler: Added an option (-df) to force the disassembler to assume
2840that the table being disassembled contains valid AML. This feature is
2841useful for disassembling AML files that contain ACPI signatures other
2842than DSDT or SSDT (such as OEMx or other signatures).
2843
2844Changes for the EFI version of the tools:
28451) Fixed a build error/issue
28462) Fixed a cast warning
2847
2848iASL: Fixed a path issue with the __FILE__ operator by making the
2849directory prefix optional within the internal SplitInputFilename
2850function.
2851
2852Debugger: Removed some unused global variables.
2853
2854Tests: Updated the makefile for proper generation of the AAPITS suite.
2855
2856
2857----------------------------------------
285804 February 2015. Summary of changes for version 20150204:
2859
2860ACPICA kernel-resident subsystem:
2861
2862Updated all ACPICA copyrights and signons to 2014. Added the 2014
2863copyright to all module headers and signons, including the standard Linux
2864header. This affects virtually every file in the ACPICA core subsystem,
2865iASL compiler, all ACPICA utilities, and the test suites.
2866
2867Events: Introduce ACPI_GPE_DISPATCH_RAW_HANDLER to fix GPE storm issues.
2868A raw gpe handling mechanism was created to allow better handling of GPE
2869storms that aren't easily managed by the normal handler. The raw handler
2870allows disabling/renabling of the the GPE so that interrupt storms can be
2871avoided in cases where events cannot be timely serviced. In this
2872scenario, handlers should use the AcpiSetGpe() API to disable/enable the
2873GPE. This API will leave the reference counts undisturbed, thereby
2874preventing unintentional clearing of the GPE when the intent in only to
2875temporarily disable it. Raw handlers allow enabling and disabling of a
2876GPE by removing GPE register locking. As such, raw handlers much provide
2877their own locks while using GPE API's to protect access to GPE data
2878structures.
2879Lv Zheng
2880
2881Events: Always modify GPE registers under the GPE lock.
2882Applies GPE lock around AcpiFinishGpe() to protect access to GPE register
2883values. Reported as bug by joe.liu@apple.com.
2884
2885Unix makefiles: Separate option to disable optimizations and
2886_FORTIFY_SOURCE. This change removes the _FORTIFY_SOURCE flag from the
2887NOOPT disable option and creates a separate flag (NOFORTIFY) for this
2888purpose. Some toolchains may define _FORTIFY_SOURCE which leads redefined
2889errors when building ACPICA. This allows disabling the option without
2890also having to disable optimazations.
2891David Box
2892
2893  Current Release:
2894    Non-Debug Version: 101.7K Code, 27.9K Data, 129.6K Total
2895    Debug Version:     199.2K Code, 82.4K Data, 281.6K Total
2896
2897--
2898--------------------------------------
289907 November 2014. Summary of changes for version 20141107:
2900
2901This release is available at https://acpica.org/downloads
2902
2903This release introduces and implements language extensions to ASL that
2904provide support for symbolic ("C-style") operators and expressions. These
2905language extensions are known collectively as ASL+.
2906
2907
29081) iASL Compiler/Disassembler and Tools:
2909
2910Disassembler: Fixed a problem with disassembly of the UartSerialBus
2911macro. Changed "StopBitsNone" to the correct "StopBitsZero". David E.
2912Box.
2913
2914Disassembler: Fixed the Unicode macro support to add escape sequences.
2915All non-printable ASCII values are emitted as escape sequences, as well
2916as the standard escapes for quote and backslash. Ensures that the
2917disassembled macro can be correctly recompiled.
2918
2919iASL: Added Printf/Fprintf macros for formatted output. These macros are
2920translated to existing AML Concatenate and Store operations. Printf
2921writes to the ASL Debug object. Fprintf allows the specification of an
2922ASL name as the target. Only a single format specifier is required, %o,
2923since the AML interpreter dynamically converts objects to the required
2924type. David E. Box.
2925
2926    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
2927                 (Concatenate (Concatenate (Concatenate ("", Arg0),
2928                 ": Unexpected value for "), Arg1), ", "), Arg2),
2929                 " at line "), Arg3), Debug)
2930
2931    (new)    Printf ("%o: Unexpected value for %o, %o at line %o",
2932                 Arg0, Arg1, Arg2, Arg3)
2933
2934    (old)    Store (Concatenate (Concatenate (Concatenate (Concatenate
2935                 ("", Arg1), ": "), Arg0), " Successful"), STR1)
2936
2937    (new)    Fprintf (STR1, "%o: %o Successful", Arg1, Arg0)
2938
2939iASL: Added debug options (-bp, -bt) to dynamically prune levels of the
2940ASL parse tree before the AML code is generated. This allows blocks of
2941ASL code to be removed in order to help locate and identify problem
2942devices and/or code. David E. Box.
2943
2944AcpiExec: Added support (-fi) for an optional namespace object
2945initialization file. This file specifies initial values for namespace
2946objects as necessary for debugging and testing different ASL code paths
2947that may be taken as a result of BIOS options.
2948
2949
29502) Overview of symbolic operator support for ASL (ASL+)
2951-------------------------------------------------------
2952
2953As an extension to the ASL language, iASL implements support for symbolic
2954(C-style) operators for math and logical expressions. This can greatly
2955simplify ASL code as well as improve both readability and
2956maintainability. These language extensions can exist concurrently with
2957all legacy ASL code and expressions.
2958
2959The symbolic extensions are 100% compatible with existing AML
2960interpreters, since no new AML opcodes are created. To implement the
2961extensions, the iASL compiler transforms the symbolic expressions into
2962the legacy ASL/AML equivalents at compile time.
2963
2964Full symbolic expressions are supported, along with the standard C
2965precedence and associativity rules.
2966
2967Full disassembler support for the symbolic expressions is provided, and
2968creates an automatic migration path for existing ASL code to ASL+ code
2969via the disassembly process. By default, the disassembler now emits ASL+
2970code with symbolic expressions. An option (-dl) is provided to force the
2971disassembler to emit legacy ASL code if desired.
2972
2973Below is the complete list of the currently supported symbolic operators
2974with examples. See the iASL User Guide for additional information.
2975
2976
2977ASL+ Syntax      Legacy ASL Equivalent
2978-----------      ---------------------
2979
2980    // Math operators
2981
2982Z = X + Y        Add (X, Y, Z)
2983Z = X - Y        Subtract (X, Y, Z)
2984Z = X * Y        Multiply (X, Y, Z)
2985Z = X / Y        Divide (X, Y, , Z)
2986Z = X % Y        Mod (X, Y, Z)
2987Z = X << Y       ShiftLeft (X, Y, Z)
2988Z = X >> Y       ShiftRight (X, Y, Z)
2989Z = X & Y        And (X, Y, Z)
2990Z = X | Y        Or (X, Y, Z)
2991Z = X ^ Y        Xor (X, Y, Z)
2992Z = ~X           Not (X, Z)
2993X++              Increment (X)
2994X--              Decrement (X)
2995
2996    // Logical operators
2997
2998(X == Y)         LEqual (X, Y)
2999(X != Y)         LNotEqual (X, Y)
3000(X < Y)          LLess (X, Y)
3001(X > Y)          LGreater (X, Y)
3002(X <= Y)         LLessEqual (X, Y)
3003(X >= Y)         LGreaterEqual (X, Y)
3004(X && Y)         LAnd (X, Y)
3005(X || Y)         LOr (X, Y)
3006(!X)             LNot (X)
3007
3008    // Assignment and compound assignment operations
3009
3010X = Y           Store (Y, X)
3011X += Y          Add (X, Y, X)
3012X -= Y          Subtract (X, Y, X)
3013X *= Y          Multiply (X, Y, X)
3014X /= Y          Divide (X, Y, , X)
3015X %= Y          Mod (X, Y, X)
3016X <<= Y         ShiftLeft (X, Y, X)
3017X >>= Y         ShiftRight (X, Y, X)
3018X &= Y          And (X, Y, X)
3019X |= Y          Or (X, Y, X)
3020X ^= Y          Xor (X, Y, X)
3021
3022
30233) ASL+ Examples:
3024-----------------
3025
3026Legacy ASL:
3027        If (LOr (LOr (LEqual (And (R510, 0x03FB), 0x02E0), LEqual (
3028            And (R520, 0x03FB), 0x02E0)), LOr (LEqual (And (R530,
30290x03FB),
3030            0x02E0), LEqual (And (R540, 0x03FB), 0x02E0))))
3031        {
3032            And (MEMB, 0xFFFFFFF0, SRMB)
3033            Store (MEMB, Local2)
3034            Store (PDBM, Local1)
3035            And (PDBM, 0xFFFFFFFFFFFFFFF9, PDBM)
3036            Store (SRMB, MEMB)
3037            Or (PDBM, 0x02, PDBM)
3038        }
3039
3040ASL+ version:
3041        If (((R510 & 0x03FB) == 0x02E0) ||
3042            ((R520 & 0x03FB) == 0x02E0) ||
3043            ((R530 & 0x03FB) == 0x02E0) ||
3044            ((R540 & 0x03FB) == 0x02E0))
3045        {
3046            SRMB = (MEMB & 0xFFFFFFF0)
3047            Local2 = MEMB
3048            Local1 = PDBM
3049            PDBM &= 0xFFFFFFFFFFFFFFF9
3050            MEMB = SRMB
3051            PDBM |= 0x02
3052        }
3053
3054Legacy ASL:
3055        Store (0x1234, Local1)
3056        Multiply (Add (Add (Local1, TEST), 0x20), Local2, Local3)
3057        Multiply (Local2, Add (Add (Local1, TEST), 0x20), Local3)
3058        Add (Local1, Add (TEST, Multiply (0x20, Local2)), Local3)
3059        Store (Index (PKG1, 0x03), Local6)
3060        Store (Add (Local3, Local2), Debug)
3061        Add (Local1, 0x0F, Local2)
3062        Add (Local1, Multiply (Local2, Local3), Local2)
3063        Multiply (Add (Add (Local1, TEST), 0x20), ToBCD (Local1), Local3)
3064
3065ASL+ version:
3066        Local1 = 0x1234
3067        Local3 = (((Local1 + TEST) + 0x20) * Local2)
3068        Local3 = (Local2 * ((Local1 + TEST) + 0x20))
3069        Local3 = (Local1 + (TEST + (0x20 * Local2)))
3070        Local6 = Index (PKG1, 0x03)
3071        Debug = (Local3 + Local2)
3072        Local2 = (Local1 + 0x0F)
3073        Local2 = (Local1 + (Local2 * Local3))
3074        Local3 = (((Local1 + TEST) + 0x20) * ToBCD (Local1))
3075
3076
3077----------------------------------------
307826 September 2014. Summary of changes for version 20140926:
3079
30801) ACPICA kernel-resident subsystem:
3081
3082Updated the GPIO operation region handler interface (GeneralPurposeIo).
3083In order to support GPIO Connection objects with multiple pins, along
3084with the related Field objects, the following changes to the interface
3085have been made: The Address is now defined to be the offset in bits of
3086the field unit from the previous invocation of a Connection. It can be
3087viewed as a "Pin Number Index" into the connection resource descriptor.
3088The BitWidth is the exact bit width of the field. It is usually one bit,
3089but not always. See the ACPICA reference guide (section 8.8.6.2.1) for
3090additional information and examples.
3091
3092GPE support: During ACPICA/GPE initialization, ensure that all GPEs with
3093corresponding _Lxx/_Exx methods are disabled (they may have been enabled
3094by the firmware), so that they cannot fire until they are enabled via
3095AcpiUpdateAllGpes. Rafael J. Wysocki.
3096
3097Added a new return flag for the Event/GPE status interfaces --
3098AcpiGetEventStatus and AcpiGetGpeStatus. The new
3099ACPI_EVENT_FLAGS_HAS_HANDLER flag is used to indicate that the event or
3100GPE currently has a handler associated with it, and can thus actually
3101affect the system. Lv Zheng.
3102
3103Example Code and Data Size: These are the sizes for the OS-independent
3104acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3105debug version of the code includes the debug output trace mechanism and
3106has a much larger code and data size.
3107
3108  Current Release:
3109    Non-Debug Version:  99.1K Code, 27.3K Data, 126.4K Total
3110    Debug Version:     192.8K Code, 79.9K Data, 272.7K Total
3111  Previous Release:
3112    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
3113    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
3114
31152) iASL Compiler/Disassembler and Tools:
3116
3117iASL: Fixed a memory allocation/free regression introduced in 20140828
3118that could cause the compiler to crash. This was introduced inadvertently
3119during the effort to eliminate compiler memory leaks. ACPICA BZ 1111,
31201113.
3121
3122iASL: Removed two error messages that have been found to create false
3123positives, until they can be fixed and fully validated (ACPICA BZ 1112):
31241) Illegal forward reference within a method
31252) Illegal reference across two methods
3126
3127iASL: Implemented a new option (-lm) to create a hardware mapping file
3128that summarizes all GPIO, I2C, SPI, and UART connections. This option
3129works for both the compiler and disassembler. See the iASL compiler user
3130guide for additional information and examples (section 6.4.6).
3131
3132AcpiDump: Added support for the version 1 (ACPI 1.0) RSDP in addition to
3133version 2. This corrects the AE_BAD_HEADER exception seen on systems with
3134a version 1 RSDP. Lv Zheng ACPICA BZ 1097.
3135
3136AcpiExec: For Unix versions, don't attempt to put STDIN into raw mode
3137unless STDIN is actually a terminal. Assists with batch-mode processing.
3138ACPICA BZ 1114.
3139
3140Disassembler/AcpiHelp: Added another large group of recognized _HID
3141values.
3142
3143
3144----------------------------------------
314528 August 2014. Summary of changes for version 20140828:
3146
31471) ACPICA kernel-resident subsystem:
3148
3149Fixed a problem related to the internal use of the Timer() operator where
3150a 64-bit divide could cause an attempted link to a double-precision math
3151library. This divide is not actually necessary, so the code was
3152restructured to eliminate it. Lv Zheng.
3153
3154ACPI 5.1: Added support for the runtime validation of the _DSD package
3155(similar to the iASL support).
3156
3157ACPI 5.1/Headers: Added support for the GICC affinity subtable to the
3158SRAT table. Hanjun Guo <hanjun.guo@linaro.org>.
3159
3160Example Code and Data Size: These are the sizes for the OS-independent
3161acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3162debug version of the code includes the debug output trace mechanism and
3163has a much larger code and data size.
3164
3165  Current Release:
3166    Non-Debug Version:  98.8K Code, 27.3K Data, 126.1K Total
3167    Debug Version:     192.1K Code, 79.8K Data, 271.9K Total
3168  Previous Release:
3169    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total1
3170    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
3171
31722) iASL Compiler/Disassembler and Tools:
3173
3174AcpiExec: Fixed a problem on unix systems where the original terminal
3175state was not always properly restored upon exit. Seen when using the -v
3176option. ACPICA BZ 1104.
3177
3178iASL: Fixed a problem with the validation of the ranges/length within the
3179Memory24 resource descriptor. There was a boundary condition when the
3180range was equal to the (length -1) caused by the fact that these values
3181are defined in 256-byte blocks, not bytes. ACPICA BZ 1098
3182
3183Disassembler: Fixed a problem with the GpioInt descriptor interrupt
3184polarity
3185flags. The flags are actually 2 bits, not 1, and the "ActiveBoth" keyword
3186is
3187now supported properly.
3188
3189ACPI 5.1: Added the GICC affinity subtable to the SRAT table. Supported
3190in the disassembler, data table compiler, and table template generator.
3191
3192iASL: Added a requirement for Device() objects that one of either a _HID
3193or _ADR must exist within the scope of a Device, as per the ACPI
3194specification. Remove a similar requirement that was incorrectly in place
3195for the _DSD object.
3196
3197iASL: Added error detection for illegal named references within control
3198methods that would cause runtime failures. Now trapped as errors are: 1)
3199References to objects within a non-parent control method. 2) Forward
3200references (within a method) -- for control methods, AML interpreters use
3201a one-pass parse of control methods. ACPICA BZ 1008.
3202
3203iASL: Added error checking for dependencies related to the _PSx power
3204methods. ACPICA BZ 1029.
32051) For _PS0, one of these must exist within the same scope: _PS1, _PS2,
3206_PS3.
32072) For _PS1, _PS2, and PS3: A _PS0 object must exist within the same
3208scope.
3209
3210iASL and table compiler: Cleanup miscellaneous memory leaks by fully
3211deploying the existing object and string caches and adding new caches for
3212the table compiler.
3213
3214iASL: Split the huge parser source file into multiple subfiles to improve
3215manageability. Generation now requires the M4 macro preprocessor, which
3216is part of the Bison distribution on both unix and windows platforms.
3217
3218AcpiSrc: Fixed and removed all extraneous warnings generated during
3219entire ACPICA source code scan and/or conversion.
3220
3221
3222----------------------------------------
3223
322424 July 2014. Summary of changes for version 20140724:
3225
3226The ACPI 5.1 specification has been released and is available at:
3227http://uefi.org/specs/access
3228
3229
32300) ACPI 5.1 support in ACPICA:
3231
3232ACPI 5.1 is fully supported in ACPICA as of this release.
3233
3234New predefined names. Support includes iASL and runtime ACPICA
3235validation.
3236    _CCA (Cache Coherency Attribute).
3237    _DSD (Device-Specific Data). David Box.
3238
3239Modifications to existing ACPI tables. Support includes headers, iASL
3240Data Table compiler, disassembler, and the template generator.
3241    FADT - New fields and flags. Graeme Gregory.
3242    GTDT - One new subtable and new fields. Tomasz Nowicki.
3243    MADT - Two new subtables. Tomasz Nowicki.
3244    PCCT - One new subtable.
3245
3246Miscellaneous.
3247    New notification type for System Resource Affinity change events.
3248
3249
32501) ACPICA kernel-resident subsystem:
3251
3252Fixed a regression introduced in 20140627 where a fault can happen during
3253the deletion of Alias AML namespace objects. The problem affected both
3254the core ACPICA and the ACPICA tools including iASL and AcpiExec.
3255
3256Implemented a new GPE public interface, AcpiMarkGpeForWake. Provides a
3257simple mechanism to enable wake GPEs that have no associated handler or
3258control method. Rafael Wysocki.
3259
3260Updated the AcpiEnableGpe interface to disallow the enable if there is no
3261handler or control method associated with the particular GPE. This will
3262help avoid meaningless GPEs and even GPE floods. Rafael Wysocki.
3263
3264Updated GPE handling and dispatch by disabling the GPE before clearing
3265the status bit for edge-triggered GPEs. Lv Zheng.
3266
3267Added Timer() support to the AML Debug object. The current timer value is
3268now displayed with each invocation of (Store to) the debug object to
3269enable simple generation of execution times for AML code (method
3270execution for example.) ACPICA BZ 1093.
3271
3272Example Code and Data Size: These are the sizes for the OS-independent
3273acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3274debug version of the code includes the debug output trace mechanism and
3275has a much larger code and data size.
3276
3277  Current Release:
3278    Non-Debug Version:  98.7K Code, 27.3K Data, 126.0K Total
3279    Debug Version:     192.0K Code, 79.7K Data, 271.7K Total
3280  Previous Release:
3281    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
3282    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
3283
3284
32852) iASL Compiler/Disassembler and Tools:
3286
3287Fixed an issue with the recently added local printf implementation,
3288concerning width/precision specifiers that could cause incorrect output.
3289Lv Zheng. ACPICA BZ 1094.
3290
3291Disassembler: Added support to detect buffers that contain UUIDs and
3292disassemble them to an invocation of the ToUUID operator. Also emit
3293commented descriptions of known ACPI-related UUIDs.
3294
3295AcpiHelp: Added support to display known ACPI-related UUIDs. New option,
3296-u. Adds three new files.
3297
3298iASL: Update table compiler and disassembler for DMAR table changes that
3299were introduced in September 2013. With assistance by David Woodhouse.
3300
3301----------------------------------------
330227 June 2014. Summary of changes for version 20140627:
3303
33041) ACPICA kernel-resident subsystem:
3305
3306Formatted Output: Implemented local versions of standard formatted output
3307utilities such as printf, etc. Over time, it has been discovered that
3308there are in fact many portability issues with printf, and the addition
3309of this feature will fix/prevent these issues once and for all. Some
3310known issues are summarized below:
3311
33121) Output of 64-bit values is not portable. For example, UINT64 is %ull
3313for the Linux kernel and is %uI64 for some MSVC versions.
33142) Invoking printf consistently in a manner that is portable across both
331532-bit and 64-bit platforms is difficult at best in many situations.
33163) The output format for pointers varies from system to system (leading
3317zeros especially), and leads to inconsistent output from ACPICA across
3318platforms.
33194) Certain platform-specific printf formats may conflict with ACPICA use.
33205) If there is no local C library available, ACPICA now has local support
3321for printf.
3322
3323-- To address these printf issues in a complete manner, ACPICA now
3324directly implements a small subset of printf format specifiers, only
3325those that it requires. Adds a new file, utilities/utprint.c. Lv Zheng.
3326
3327Implemented support for ACPICA generation within the EFI environment.
3328Initially, the AcpiDump utility is supported in the UEFI shell
3329environment. Lv Zheng.
3330
3331Added a new external interface, AcpiLogError, to improve ACPICA
3332portability. This allows the host to redirect error messages from the
3333ACPICA utilities. Lv Zheng.
3334
3335Added and deployed new OSL file I/O interfaces to improve ACPICA
3336portability:
3337  AcpiOsOpenFile
3338  AcpiOsCloseFile
3339  AcpiOsReadFile
3340  AcpiOsWriteFile
3341  AcpiOsGetFileOffset
3342  AcpiOsSetFileOffset
3343There are C library implementations of these functions in the new file
3344service_layers/oslibcfs.c -- however, the functions can be implemented by
3345the local host in any way necessary. Lv Zheng.
3346
3347Implemented a mechanism to disable/enable ACPI table checksum validation
3348at runtime. This can be useful when loading tables very early during OS
3349initialization when it may not be possible to map the entire table in
3350order to compute the checksum. Lv Zheng.
3351
3352Fixed a buffer allocation issue for the Generic Serial Bus support.
3353Originally, a fixed buffer length was used. This change allows for
3354variable-length buffers based upon the protocol indicated by the field
3355access attributes. Reported by Lan Tianyu. Lv Zheng.
3356
3357Fixed a problem where an object detached from a namespace node was not
3358properly terminated/cleared and could cause a circular list problem if
3359reattached. ACPICA BZ 1063. David Box.
3360
3361Fixed a possible recursive lock acquisition in hwregs.c. Rakib Mullick.
3362
3363Fixed a possible memory leak in an error return path within the function
3364AcpiUtCopyIobjectToIobject. ACPICA BZ 1087. Colin Ian King.
3365
3366Example Code and Data Size: These are the sizes for the OS-independent
3367acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3368debug version of the code includes the debug output trace mechanism and
3369has a much larger code and data size.
3370
3371  Current Release:
3372    Non-Debug Version:  98.7K Code, 27.2K Data, 125.9K Total
3373    Debug Version:     191.7K Code, 79.6K Data, 271.3K Total
3374  Previous Release:
3375    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
3376    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
3377
3378
33792) iASL Compiler/Disassembler and Tools:
3380
3381Disassembler: Add dump of ASCII equivalent text within a comment at the
3382end of each line of the output for the Buffer() ASL operator.
3383
3384AcpiDump: Miscellaneous changes:
3385  Fixed repetitive table dump in -n mode.
3386  For older EFI platforms, use the ACPI 1.0 GUID during RSDP search if
3387the ACPI 2.0 GUID fails.
3388
3389iASL: Fixed a problem where the compiler could fault if incorrectly given
3390an acpidump output file as input. ACPICA BZ 1088. David Box.
3391
3392AcpiExec/AcpiNames: Fixed a problem where these utilities could fault if
3393they are invoked without any arguments.
3394
3395Debugger: Fixed a possible memory leak in an error return path. ACPICA BZ
33961086. Colin Ian King.
3397
3398Disassembler: Cleaned up a block of code that extracts a parent Op
3399object. Added a comment that explains that the parent is guaranteed to be
3400valid in this case. ACPICA BZ 1069.
3401
3402
3403----------------------------------------
340424 April 2014. Summary of changes for version 20140424:
3405
34061) ACPICA kernel-resident subsystem:
3407
3408Implemented support to skip/ignore NULL address entries in the RSDT/XSDT.
3409Some of these tables are known to contain a trailing NULL entry. Lv
3410Zheng.
3411
3412Removed an extraneous error message for the case where there are a large
3413number of system GPEs (> 124). This was the "32-bit FADT register is too
3414long to convert to GAS struct" message, which is irrelevant for GPEs
3415since the GPEx_BLK_LEN fields of the FADT are always used instead of the
3416(limited capacity) GAS bit length. Also, several changes to ensure proper
3417support for GPE numbers > 255, where some "GPE number" fields were 8-bits
3418internally.
3419
3420Implemented and deployed additional configuration support for the public
3421ACPICA external interfaces. Entire classes of interfaces can now be
3422easily modified or configured out, replaced by stubbed inline functions
3423by default. Lv Zheng.
3424
3425Moved all public ACPICA runtime configuration globals to the public
3426ACPICA external interface file for convenience. Also, removed some
3427obsolete/unused globals. See the file acpixf.h. Lv Zheng.
3428
3429Documentation: Added a new section to the ACPICA reference describing the
3430maximum number of GPEs that can be supported by the FADT-defined GPEs in
3431block zero and one. About 1200 total. See section 4.4.1 of the ACPICA
3432reference.
3433
3434Example Code and Data Size: These are the sizes for the OS-independent
3435acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3436debug version of the code includes the debug output trace mechanism and
3437has a much larger code and data size.
3438
3439  Current Release:
3440    Non-Debug Version:  96.8K Code, 27.2K Data, 124.0K Total
3441    Debug Version:     189.5K Code, 79.7K Data, 269.2K Total
3442  Previous Release:
3443    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
3444    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
3445
3446
34472) iASL Compiler/Disassembler and Tools:
3448
3449iASL and disassembler: Add full support for the LPIT table (Low Power
3450Idle Table). Includes support in the disassembler, data table compiler,
3451and template generator.
3452
3453AcpiDump utility:
34541) Add option to force the use of the RSDT (over the XSDT).
34552) Improve validation of the RSDP signature (use 8 chars instead of 4).
3456
3457iASL: Add check for predefined packages that are too large.  For
3458predefined names that contain subpackages, check if each subpackage is
3459too large. (Check for too small already exists.)
3460
3461Debugger: Updated the GPE command (which simulates a GPE by executing the
3462GPE code paths in ACPICA). The GPE device is now optional, and defaults
3463to the GPE 0/1 FADT-defined blocks.
3464
3465Unix application OSL: Update line-editing support. Add additional error
3466checking and take care not to reset terminal attributes on exit if they
3467were never set. This should help guarantee that the terminal is always
3468left in the previous state on program exit.
3469
3470
3471----------------------------------------
347225 March 2014. Summary of changes for version 20140325:
3473
34741) ACPICA kernel-resident subsystem:
3475
3476Updated the auto-serialize feature for control methods. This feature
3477automatically serializes all methods that create named objects in order
3478to prevent runtime errors. The update adds support to ignore the
3479currently executing AML SyncLevel when invoking such a method, in order
3480to prevent disruption of any existing SyncLevel priorities that may exist
3481in the AML code. Although the use of SyncLevels is relatively rare, this
3482change fixes a regression where an AE_AML_MUTEX_ORDER exception can
3483appear on some machines starting with the 20140214 release.
3484
3485Added a new external interface to allow the host to install ACPI tables
3486very early, before the namespace is even created. AcpiInstallTable gives
3487the host additional flexibility for ACPI table management. Tables can be
3488installed directly by the host as if they had originally appeared in the
3489XSDT/RSDT. Installed tables can be SSDTs or other ACPI data tables
3490(anything except the DSDT and FACS). Adds a new file, tbdata.c, along
3491with additional internal restructuring and cleanup. See the ACPICA
3492Reference for interface details. Lv Zheng.
3493
3494Added validation of the checksum for all incoming dynamically loaded
3495tables (via external interfaces or via AML Load/LoadTable operators). Lv
3496Zheng.
3497
3498Updated the use of the AcpiOsWaitEventsComplete interface during Notify
3499and GPE handler removal. Restructured calls to eliminate possible race
3500conditions. Lv Zheng.
3501
3502Added a warning for the use/execution of the ASL/AML Unload (table)
3503operator. This will help detect and identify machines that use this
3504operator if and when it is ever used. This operator has never been seen
3505in the field and the usage model and possible side-effects of the drastic
3506runtime action of a full table removal are unknown.
3507
3508Reverted the use of #pragma push/pop which was introduced in the 20140214
3509release. It appears that push and pop are not implemented by enough
3510compilers to make the use of this feature feasible for ACPICA at this
3511time. However, these operators may be deployed in a future ACPICA
3512release.
3513
3514Added the missing EXPORT_SYMBOL macros for the install and remove SCI
3515handler interfaces.
3516
3517Source code generation:
35181) Disabled the use of the "strchr" macro for the gcc-specific
3519generation. For some versions of gcc, this macro can periodically expose
3520a compiler bug which in turn causes compile-time error(s).
35212) Added support for PPC64 compilation. Colin Ian King.
3522
3523Example Code and Data Size: These are the sizes for the OS-independent
3524acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3525debug version of the code includes the debug output trace mechanism and
3526has a much larger code and data size.
3527
3528  Current Release:
3529    Non-Debug Version:  97.0K Code, 27.2K Data, 124.2K Total
3530    Debug Version:     189.7K Code, 79.5K Data, 269.2K Total
3531  Previous Release:
3532    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
3533    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
3534
3535
35362) iASL Compiler/Disassembler and Tools:
3537
3538Disassembler: Added several new features to improve the readability of
3539the resulting ASL code. Extra information is emitted within comment
3540fields in the ASL code:
35411) Known _HID/_CID values are decoded to descriptive text.
35422) Standard values for the Notify() operator are decoded to descriptive
3543text.
35443) Target operands are expanded to full pathnames (in a comment) when
3545possible.
3546
3547Disassembler: Miscellaneous updates for extern() handling:
35481) Abort compiler if file specified by -fe option does not exist.
35492) Silence unnecessary warnings about argument count mismatches.
35503) Update warning messages concerning unresolved method externals.
35514) Emit "UnknownObj" keyword for externals whose type cannot be
3552determined.
3553
3554AcpiHelp utility:
35551) Added the -a option to display both the ASL syntax and the AML
3556encoding for an input ASL operator. This effectively displays all known
3557information about an ASL operator with one AcpiHelp invocation.
35582) Added substring match support (similar to a wildcard) for the -i
3559(_HID/PNP IDs) option.
3560
3561iASL/Disassembler: Since this tool does not yet support execution on big-
3562endian machines, added detection of endianness and an error message if
3563execution is attempted on big-endian. Support for big-endian within iASL
3564is a feature that is on the ACPICA to-be-done list.
3565
3566AcpiBin utility:
35671) Remove option to extract binary files from an acpidump; this function
3568is made obsolete by the AcpiXtract utility.
35692) General cleanup of open files and allocated buffers.
3570
3571
3572----------------------------------------
357314 February 2014. Summary of changes for version 20140214:
3574
35751) ACPICA kernel-resident subsystem:
3576
3577Implemented a new mechanism to proactively prevent problems with ill-
3578behaved reentrant control methods that create named ACPI objects. This
3579behavior is illegal as per the ACPI specification, but is nonetheless
3580frequently seen in the field. Previously, this could lead to an
3581AE_ALREADY_EXISTS exception if the method was actually entered by more
3582than one thread. This new mechanism detects such methods at table load
3583time and marks them "serialized" to prevent reentrancy. A new global
3584option, AcpiGbl_AutoSerializeMethods, has been added to disable this
3585feature if desired. This mechanism and global option obsoletes and
3586supersedes the previous AcpiGbl_SerializeAllMethods option.
3587
3588Added the "Windows 2013" string to the _OSI support. ACPICA will now
3589respond TRUE to _OSI queries with this string. It is the stated policy of
3590ACPICA to add new strings to the _OSI support as soon as possible after
3591they are defined. See the full ACPICA _OSI policy which has been added to
3592the utilities/utosi.c file.
3593
3594Hardened/updated the _PRT return value auto-repair code:
35951) Do not abort the repair on a single subpackage failure, continue to
3596check all subpackages.
35972) Add check for the minimum subpackage length (4).
35983) Properly handle extraneous NULL package elements.
3599
3600Added support to avoid the possibility of infinite loops when traversing
3601object linked lists. Never allow an infinite loop, even in the face of
3602corrupted object lists.
3603
3604ACPICA headers: Deployed the use of #pragma pack(push) and #pragma
3605pack(pop) directives to ensure that the ACPICA headers are independent of
3606compiler settings or other host headers.
3607
3608Example Code and Data Size: These are the sizes for the OS-independent
3609acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3610debug version of the code includes the debug output trace mechanism and
3611has a much larger code and data size.
3612
3613  Current Release:
3614    Non-Debug Version:  96.5K Code, 27.2K Data, 123.7K Total
3615    Debug Version:     188.6K Code, 79.0K Data, 267.6K Total
3616  Previous Release:
3617    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
3618    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
3619
3620
36212) iASL Compiler/Disassembler and Tools:
3622
3623iASL/Table-compiler: Fixed a problem with support for the SPMI table. The
3624first reserved field was incorrectly forced to have a value of zero. This
3625change correctly forces the field to have a value of one. ACPICA BZ 1081.
3626
3627Debugger: Added missing support for the "Extra" and "Data" subobjects
3628when displaying object data.
3629
3630Debugger: Added support to display entire object linked lists when
3631displaying object data.
3632
3633iASL: Removed the obsolete -g option to obtain ACPI tables from the
3634Windows registry. This feature has been superseded by the acpidump
3635utility.
3636
3637
3638----------------------------------------
363914 January 2014. Summary of changes for version 20140114:
3640
36411) ACPICA kernel-resident subsystem:
3642
3643Updated all ACPICA copyrights and signons to 2014. Added the 2014
3644copyright to all module headers and signons, including the standard Linux
3645header. This affects virtually every file in the ACPICA core subsystem,
3646iASL compiler, all ACPICA utilities, and the test suites.
3647
3648Improved parameter validation for AcpiInstallGpeBlock. Added the
3649following checks:
36501) The incoming device handle refers to type ACPI_TYPE_DEVICE.
36512) There is not already a GPE block attached to the device.
3652Likewise, with AcpiRemoveGpeBlock, ensure that the incoming object is a
3653device.
3654
3655Correctly support "references" in the ACPI_OBJECT. This change fixes the
3656support to allow references (namespace nodes) to be passed as arguments
3657to control methods via the evaluate object interface. This is probably
3658most useful for testing purposes, however.
3659
3660Improved support for 32/64 bit physical addresses in printf()-like
3661output. This change improves the support for physical addresses in printf
3662debug statements and other output on both 32-bit and 64-bit hosts. It
3663consistently outputs the appropriate number of bytes for each host. The
3664%p specifier is unsatisfactory since it does not emit uniform output on
3665all hosts/clib implementations (on some, leading zeros are not supported,
3666leading to difficult-to-read output).
3667
3668Example Code and Data Size: These are the sizes for the OS-independent
3669acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3670debug version of the code includes the debug output trace mechanism and
3671has a much larger code and data size.
3672
3673  Current Release:
3674    Non-Debug Version:  96.2K Code, 27.0K Data, 123.2K Total
3675    Debug Version:     187.5K Code, 78.3K Data, 265.8K Total
3676  Previous Release:
3677    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
3678    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
3679
3680
36812) iASL Compiler/Disassembler and Tools:
3682
3683iASL: Fix a possible fault when using the Connection() operator. Fixes a
3684problem if the parent Field definition for the Connection operator refers
3685to an operation region that does not exist. ACPICA BZ 1064.
3686
3687AcpiExec: Load of local test tables is now optional. The utility has the
3688capability to load some various tables to test features of ACPICA.
3689However, there are enough of them that the output of the utility became
3690confusing. With this change, only the required local tables are displayed
3691(RSDP, XSDT, etc.) along with the actual tables loaded via the command
3692line specification. This makes the default output simler and easier to
3693understand. The -el command line option restores the original behavior
3694for testing purposes.
3695
3696AcpiExec: Added support for overlapping operation regions. This change
3697expands the simulation of operation regions by supporting regions that
3698overlap within the given address space. Supports SystemMemory and
3699SystemIO. ASLTS test suite updated also. David Box. ACPICA BZ 1031.
3700
3701AcpiExec: Added region handler support for PCI_Config and EC spaces. This
3702allows AcpiExec to simulate these address spaces, similar to the current
3703support for SystemMemory and SystemIO.
3704
3705Debugger: Added new command to read/write/compare all namespace objects.
3706The command "test objects" will exercise the entire namespace by writing
3707new values to each data object, and ensuring that the write was
3708successful. The original value is then restored and verified.
3709
3710Debugger: Added the "test predefined" command. This change makes this
3711test public and puts it under the new "test" command. The test executes
3712each and every predefined name within the current namespace.
3713
3714
3715----------------------------------------
371618 December 2013. Summary of changes for version 20131218:
3717
3718Global note: The ACPI 5.0A specification was released this month. There
3719are no changes needed for ACPICA since this release of ACPI is an
3720errata/clarification release. The specification is available at
3721acpi.info.
3722
3723
37241) ACPICA kernel-resident subsystem:
3725
3726Added validation of the XSDT root table if it is present. Some older
3727platforms contain an XSDT that is ill-formed or otherwise invalid (such
3728as containing some or all entries that are NULL pointers). This change
3729adds a new function to validate the XSDT before actually using it. If the
3730XSDT is found to be invalid, ACPICA will now automatically fall back to
3731using the RSDT instead. Original implementation by Zhao Yakui. Ported to
3732ACPICA and enhanced by Lv Zheng and Bob Moore.
3733
3734Added a runtime option to ignore the XSDT and force the use of the RSDT.
3735This change adds a runtime option that will force ACPICA to use the RSDT
3736instead of the XSDT (AcpiGbl_DoNotUseXsdt). Although the ACPI spec
3737requires that an XSDT be used instead of the RSDT, the XSDT has been
3738found to be corrupt or ill-formed on some machines. Lv Zheng.
3739
3740Added a runtime option to favor 32-bit FADT register addresses over the
374164-bit addresses. This change adds an option to favor 32-bit FADT
3742addresses when there is a conflict between the 32-bit and 64-bit versions
3743of the same register. The default behavior is to use the 64-bit version
3744in accordance with the ACPI specification. This can now be overridden via
3745the AcpiGbl_Use32BitFadtAddresses flag. ACPICA BZ 885. Lv Zheng.
3746
3747During the change above, the internal "Convert FADT" and "Verify FADT"
3748functions have been merged to simplify the code, making it easier to
3749understand and maintain. ACPICA BZ 933.
3750
3751Improve exception reporting and handling for GPE block installation.
3752Return an actual status from AcpiEvGetGpeXruptBlock and don't clobber the
3753status when exiting AcpiEvInstallGpeBlock. ACPICA BZ 1019.
3754
3755Added helper macros to extract bus/segment numbers from the HEST table.
3756This change adds two macros to extract the encoded bus and segment
3757numbers from the HEST Bus field - ACPI_HEST_BUS and ACPI_HEST_SEGMENT.
3758Betty Dall <betty.dall@hp.com>
3759
3760Removed the unused ACPI_FREE_BUFFER macro. This macro is no longer used
3761by ACPICA. It is not a public macro, so it should have no effect on
3762existing OSV code. Lv Zheng.
3763
3764Example Code and Data Size: These are the sizes for the OS-independent
3765acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3766debug version of the code includes the debug output trace mechanism and
3767has a much larger code and data size.
3768
3769  Current Release:
3770    Non-Debug Version:  96.1K Code, 27.0K Data, 123.1K Total
3771    Debug Version:     185.6K Code, 77.3K Data, 262.9K Total
3772  Previous Release:
3773    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
3774    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
3775
3776
37772) iASL Compiler/Disassembler and Tools:
3778
3779Disassembler: Improved pathname support for emitted External()
3780statements. This change adds full pathname support for external names
3781that have been resolved internally by the inclusion of additional ACPI
3782tables (via the iASL -e option). Without this change, the disassembler
3783can emit multiple externals for the same object, or it become confused
3784when the Scope() operator is used on an external object. Overall, greatly
3785improves the ability to actually recompile the emitted ASL code when
3786objects a referenced across multiple ACPI tables. Reported by Michael
3787Tsirkin (mst@redhat.com).
3788
3789Tests/ASLTS: Updated functional control suite to execute with no errors.
3790David Box. Fixed several errors related to the testing of the interpreter
3791slack mode. Lv Zheng.
3792
3793iASL: Added support to detect names that are declared within a control
3794method, but are unused (these are temporary names that are only valid
3795during the time the method is executing). A remark is issued for these
3796cases. ACPICA BZ 1022.
3797
3798iASL: Added full support for the DBG2 table. Adds full disassembler,
3799table compiler, and template generator support for the DBG2 table (Debug
3800Port 2 table).
3801
3802iASL: Added full support for the PCCT table, update the table definition.
3803Updates the PCCT table definition in the actbl3.h header and adds table
3804compiler and template generator support.
3805
3806iASL: Added an option to emit only error messages (no warnings/remarks).
3807The -ve option will enable only error messages, warnings and remarks are
3808suppressed. This can simplify debugging when only the errors are
3809important, such as when an ACPI table is disassembled and there are many
3810warnings and remarks -- but only the actual errors are of real interest.
3811
3812Example ACPICA code (source/tools/examples): Updated the example code so
3813that it builds to an actual working program, not just example code. Added
3814ACPI tables and execution of an example control method in the DSDT. Added
3815makefile support for Unix generation.
3816
3817
3818----------------------------------------
381915 November 2013. Summary of changes for version 20131115:
3820
3821This release is available at https://acpica.org/downloads
3822
3823
38241) ACPICA kernel-resident subsystem:
3825
3826Resource Manager: Fixed loop termination for the "get AML length"
3827function. The loop previously had an error termination on a NULL resource
3828pointer, which can never happen since the loop simply increments a valid
3829resource pointer. This fix changes the loop to terminate with an error on
3830an invalid end-of-buffer condition. The problem can be seen as an
3831infinite loop by callers to AcpiSetCurrentResources with an invalid or
3832corrupted resource descriptor, or a resource descriptor that is missing
3833an END_TAG descriptor. Reported by Dan Carpenter
3834<dan.carpenter@oracle.com>. Lv Zheng, Bob Moore.
3835
3836Table unload and ACPICA termination: Delete all attached data objects
3837during namespace node deletion. This fix updates namespace node deletion
3838to delete the entire list of attached objects (attached via
3839AcpiAttachObject) instead of just one of the attached items. ACPICA BZ
38401024. Tomasz Nowicki (tomasz.nowicki@linaro.org).
3841
3842ACPICA termination: Added support to delete all objects attached to the
3843root namespace node. This fix deletes any and all objects that have been
3844attached to the root node via AcpiAttachData. Previously, none of these
3845objects were deleted. Reported by Tomasz Nowicki. ACPICA BZ 1026.
3846
3847Debug output: Do not emit the function nesting level for the in-kernel
3848build. The nesting level is really only useful during a single-thread
3849execution. Therefore, only enable this output for the AcpiExec utility.
3850Also, only emit the thread ID when executing under AcpiExec (Context
3851switches are still always detected and a message is emitted). ACPICA BZ
3852972.
3853
3854Example Code and Data Size: These are the sizes for the OS-independent
3855acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3856debug version of the code includes the debug output trace mechanism and
3857has a much larger code and data size.
3858
3859  Current Release:
3860    Non-Debug Version:  95.9K Code, 27.0K Data, 122.9K Total
3861    Debug Version:     185.1K Code, 77.2K Data, 262.3K Total
3862  Previous Release:
3863    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
3864    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
3865
3866
38672) iASL Compiler/Disassembler and Tools:
3868
3869AcpiExec/Unix-OSL: Use <termios.h> instead of <termio.h>. This is the
3870correct portable POSIX header for terminal control functions.
3871
3872Disassembler: Fixed control method invocation issues related to the use
3873of the CondRefOf() operator. The problem is seen in the disassembly where
3874control method invocations may not be disassembled properly if the
3875control method name has been used previously as an argument to CondRefOf.
3876The solution is to not attempt to emit an external declaration for the
3877CondRefOf target (it is not necessary in the first place). This prevents
3878disassembler object type confusion. ACPICA BZ 988.
3879
3880Unix Makefiles: Added an option to disable compiler optimizations and the
3881_FORTIFY_SOURCE flag. Some older compilers have problems compiling ACPICA
3882with optimizations (reportedly, gcc 4.4 for example). This change adds a
3883command line option for make (NOOPT) that disables all compiler
3884optimizations and the _FORTIFY_SOURCE compiler flag. The default
3885optimization is -O2 with the _FORTIFY_SOURCE flag specified. ACPICA BZ
38861034. Lv Zheng, Bob Moore.
3887
3888Tests/ASLTS: Added options to specify individual test cases and modes.
3889This allows testers running aslts.sh to optionally specify individual
3890test modes and test cases. Also added an option to disable the forced
3891generation of the ACPICA tools from source if desired. Lv Zheng.
3892
3893----------------------------------------
389427 September 2013. Summary of changes for version 20130927:
3895
3896This release is available at https://acpica.org/downloads
3897
3898
38991) ACPICA kernel-resident subsystem:
3900
3901Fixed a problem with store operations to reference objects. This change
3902fixes a problem where a Store operation to an ArgX object that contained
3903a
3904reference to a field object did not complete the automatic dereference
3905and
3906then write to the actual field object. Instead, the object type of the
3907field object was inadvertently changed to match the type of the source
3908operand. The new behavior will actually write to the field object (buffer
3909field or field unit), thus matching the correct ACPI-defined behavior.
3910
3911Implemented support to allow the host to redefine individual OSL
3912prototypes. This change enables the host to redefine OSL prototypes found
3913in the acpiosxf.h file. This allows the host to implement OSL interfaces
3914with a macro or inlined function. Further, it allows the host to add any
3915additional required modifiers such as __iomem, __init, __exit, etc., as
3916necessary on a per-interface basis. Enables maximum flexibility for the
3917OSL interfaces. Lv Zheng.
3918
3919Hardcoded the access width for the FADT-defined reset register. The ACPI
3920specification requires the reset register width to be 8 bits. ACPICA now
3921hardcodes the width to 8 and ignores the FADT width value. This provides
3922compatibility with other ACPI implementations that have allowed BIOS code
3923with bad register width values to go unnoticed. Matthew Garett, Bob
3924Moore,
3925Lv Zheng.
3926
3927Changed the position/use of the ACPI_PRINTF_LIKE macro. This macro is
3928used
3929in the OSL header (acpiosxf). The change modifies the position of this
3930macro in each instance where it is used (AcpiDebugPrint, etc.) to avoid
3931build issues if the OSL defines the implementation of the interface to be
3932an inline stub function. Lv Zheng.
3933
3934Deployed a new macro ACPI_EXPORT_SYMBOL_INIT for the main ACPICA
3935initialization interfaces. This change adds a new macro for the main init
3936and terminate external interfaces in order to support hosts that require
3937additional or different processing for these functions. Changed from
3938ACPI_EXPORT_SYMBOL to ACPI_EXPORT_SYMBOL_INIT for these functions. Lv
3939Zheng, Bob Moore.
3940
3941Cleaned up the memory allocation macros for configurability. In the
3942common
3943case, the ACPI_ALLOCATE and related macros now resolve directly to their
3944respective AcpiOs* OSL interfaces. Two options:
39451) The ACPI_ALLOCATE_ZEROED macro uses a simple local implementation by
3946default, unless overridden by the USE_NATIVE_ALLOCATE_ZEROED define.
39472) For AcpiExec (and for debugging), the macros can optionally be
3948resolved
3949to the local ACPICA interfaces that track each allocation (local tracking
3950is used to immediately detect memory leaks).
3951Lv Zheng.
3952
3953Simplified the configuration for ACPI_REDUCED_HARDWARE. Allows the kernel
3954to predefine this macro to either TRUE or FALSE during the system build.
3955
3956Replaced __FUNCTION_ with __func__ in the gcc-specific header.
3957
3958Example Code and Data Size: These are the sizes for the OS-independent
3959acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
3960debug version of the code includes the debug output trace mechanism and
3961has a much larger code and data size.
3962
3963  Current Release:
3964    Non-Debug Version:  95.8K Code, 27.0K Data, 122.8K Total
3965    Debug Version:     185.2K Code, 77.2K Data, 262.4K Total
3966  Previous Release:
3967    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
3968    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
3969
3970
39712) iASL Compiler/Disassembler and Tools:
3972
3973iASL: Implemented wildcard support for the -e option. This simplifies use
3974when there are many SSDTs that must be included to resolve external
3975method
3976declarations. ACPICA BZ 1041. Example:
3977    iasl -e ssdt*.dat -d dsdt.dat
3978
3979AcpiExec: Add history/line-editing for Unix/Linux systems. This change
3980adds a portable module that implements full history and limited line
3981editing for Unix and Linux systems. It does not use readline() due to
3982portability issues. Instead it uses the POSIX termio interface to put the
3983terminal in raw input mode so that the various special keys can be
3984trapped
3985(such as up/down-arrow for history support and left/right-arrow for line
3986editing). Uses the existing debugger history mechanism. ACPICA BZ 1036.
3987
3988AcpiXtract: Add support to handle (ignore) "empty" lines containing only
3989one or more spaces. This provides compatible with early or different
3990versions of the AcpiDump utility. ACPICA BZ 1044.
3991
3992AcpiDump: Do not ignore tables that contain only an ACPI table header.
3993Apparently, some BIOSs create SSDTs that contain an ACPI table header but
3994no other data. This change adds support to dump these tables. Any tables
3995shorter than the length of an ACPI table header remain in error (an error
3996message is emitted). Reported by Yi Li.
3997
3998Debugger: Echo actual command along with the "unknown command" message.
3999
4000----------------------------------------
400123 August 2013. Summary of changes for version 20130823:
4002
40031) ACPICA kernel-resident subsystem:
4004
4005Implemented support for host-installed System Control Interrupt (SCI)
4006handlers. Certain ACPI functionality requires the host to handle raw
4007SCIs. For example, the "SCI Doorbell" that is defined for memory power
4008state support requires the host device driver to handle SCIs to examine
4009if the doorbell has been activated. Multiple SCI handlers can be
4010installed to allow for future expansion. New external interfaces are
4011AcpiInstallSciHandler, AcpiRemoveSciHandler; see the ACPICA reference for
4012details. Lv Zheng, Bob Moore. ACPICA BZ 1032.
4013
4014Operation region support: Never locally free the handler "context"
4015pointer. This change removes some dangerous code that attempts to free
4016the handler context pointer in some (rare) circumstances. The owner of
4017the handler owns this pointer and the ACPICA code should never touch it.
4018Although not seen to be an issue in any kernel, it did show up as a
4019problem (fault) under AcpiExec. Also, set the internal storage field for
4020the context pointer to zero when the region is deactivated, simply for
4021sanity. David Box. ACPICA BZ 1039.
4022
4023AcpiRead: On error, do not modify the return value target location. If an
4024error happens in the middle of a split 32/32 64-bit I/O operation, do not
4025modify the target of the return value pointer. Makes the code consistent
4026with the rest of ACPICA. Bjorn Helgaas.
4027
4028Example Code and Data Size: These are the sizes for the OS-independent
4029acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4030debug version of the code includes the debug output trace mechanism and
4031has a much larger code and data size.
4032
4033  Current Release:
4034    Non-Debug Version:  96.7K Code, 27.1K Data, 123.9K Total
4035    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
4036  Previous Release:
4037    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
4038    Debug Version:     185.4K Code, 77.1K Data, 262.5K Total
4039
4040
40412) iASL Compiler/Disassembler and Tools:
4042
4043AcpiDump: Implemented several new features and fixed some problems:
40441) Added support to dump the RSDP, RSDT, and XSDT tables.
40452) Added support for multiple table instances (SSDT, UEFI).
40463) Added option to dump "customized" (overridden) tables (-c).
40474) Fixed a problem where some table filenames were improperly
4048constructed.
40495) Improved some error messages, removed some unnecessary messages.
4050
4051iASL: Implemented additional support for disassembly of ACPI tables that
4052contain invocations of external control methods. The -fe<file> option
4053allows the import of a file that specifies the external methods along
4054with the required number of arguments for each -- allowing for the
4055correct disassembly of the table. This is a workaround for a limitation
4056of AML code where the disassembler often cannot determine the number of
4057arguments required for an external control method and generates incorrect
4058ASL code. See the iASL reference for details. ACPICA BZ 1030.
4059
4060Debugger: Implemented a new command (paths) that displays the full
4061pathnames (namepaths) and object types of all objects in the namespace.
4062This is an alternative to the namespace command.
4063
4064Debugger: Implemented a new command (sci) that invokes the SCI dispatch
4065mechanism and any installed handlers.
4066
4067iASL: Fixed a possible segfault for "too many parent prefixes" condition.
4068This can occur if there are too many parent prefixes in a namepath (for
4069example, ^^^^^^PCI0.ECRD). ACPICA BZ 1035.
4070
4071Application OSLs: Set the return value for the PCI read functions. These
4072functions simply return AE_OK, but should set the return value to zero
4073also. This change implements this. ACPICA BZ 1038.
4074
4075Debugger: Prevent possible command line buffer overflow. Increase the
4076size of a couple of the debugger line buffers, and ensure that overflow
4077cannot happen. ACPICA BZ 1037.
4078
4079iASL: Changed to abort immediately on serious errors during the parsing
4080phase. Due to the nature of ASL, there is no point in attempting to
4081compile these types of errors, and they typically end up causing a
4082cascade of hundreds of errors which obscure the original problem.
4083
4084----------------------------------------
408525 July 2013. Summary of changes for version 20130725:
4086
40871) ACPICA kernel-resident subsystem:
4088
4089Fixed a problem with the DerefOf operator where references to FieldUnits
4090and BufferFields incorrectly returned the parent object, not the actual
4091value of the object. After this change, a dereference of a FieldUnit
4092reference results in a read operation on the field to get the value, and
4093likewise, the appropriate BufferField value is extracted from the target
4094buffer.
4095
4096Fixed a problem where the _WAK method could cause a fault under these
4097circumstances: 1) Interpreter slack mode was not enabled, and 2) the _WAK
4098method returned no value. The problem is rarely seen because most kernels
4099run ACPICA in slack mode.
4100
4101For the DerefOf operator, a fatal error now results if an attempt is made
4102to dereference a reference (created by the Index operator) to a NULL
4103package element. Provides compatibility with other ACPI implementations,
4104and this behavior will be added to a future version of the ACPI
4105specification.
4106
4107The ACPI Power Management Timer (defined in the FADT) is now optional.
4108This provides compatibility with other ACPI implementations and will
4109appear in the next version of the ACPI specification. If there is no PM
4110Timer on the platform, AcpiGetTimer returns AE_SUPPORT. An address of
4111zero in the FADT indicates no PM timer.
4112
4113Implemented a new interface for _OSI support, AcpiUpdateInterfaces. This
4114allows the host to globally enable/disable all vendor strings, all
4115feature strings, or both. Intended to be primarily used for debugging
4116purposes only. Lv Zheng.
4117
4118Expose the collected _OSI data to the host via a global variable. This
4119data tracks the highest level vendor ID that has been invoked by the BIOS
4120so that the host (and potentially ACPICA itself) can change behaviors
4121based upon the age of the BIOS.
4122
4123Example Code and Data Size: These are the sizes for the OS-independent
4124acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4125debug version of the code includes the debug output trace mechanism and
4126has a much larger code and data size.
4127
4128  Current Release:
4129    Non-Debug Version:  96.2K Code, 27.1K Data, 123.3K Total
4130    Debug Version:     184.4K Code, 76.8K Data, 261.2K Total
4131  Previous Release:
4132    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
4133    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
4134
4135
41362) iASL Compiler/Disassembler and Tools:
4137
4138iASL: Created the following enhancements for the -so option (create
4139offset table):
41401)Add offsets for the last nameseg in each namepath for every supported
4141object type
41422)Add support for Processor, Device, Thermal Zone, and Scope objects
41433)Add the actual AML opcode for the parent object of every supported
4144object type
41454)Add support for the ZERO/ONE/ONES AML opcodes for integer objects
4146
4147Disassembler: Emit all unresolved external symbols in a single block.
4148These are external references to control methods that could not be
4149resolved, and thus, the disassembler had to make a guess at the number of
4150arguments to parse.
4151
4152iASL: The argument to the -T option (create table template) is now
4153optional. If not specified, the default table is a DSDT, typically the
4154most common case.
4155
4156----------------------------------------
415726 June 2013. Summary of changes for version 20130626:
4158
41591) ACPICA kernel-resident subsystem:
4160
4161Fixed an issue with runtime repair of the _CST object. Null or invalid
4162elements were not always removed properly. Lv Zheng.
4163
4164Removed an arbitrary restriction of 256 GPEs per GPE block (such as the
4165FADT-defined GPE0 and GPE1). For GPE0, GPE1, and each GPE Block Device,
4166the maximum number of GPEs is 1016. Use of multiple GPE block devices
4167makes the system-wide number of GPEs essentially unlimited.
4168
4169Example Code and Data Size: These are the sizes for the OS-independent
4170acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4171debug version of the code includes the debug output trace mechanism and
4172has a much larger code and data size.
4173
4174  Current Release:
4175    Non-Debug Version:  95.9K Code, 26.9K Data, 122.8K Total
4176    Debug Version:     184.1K Code, 76.7K Data, 260.8K Total
4177  Previous Release:
4178    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
4179    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
4180
4181
41822) iASL Compiler/Disassembler and Tools:
4183
4184Portable AcpiDump: Implemented full support for the Linux and FreeBSD
4185hosts. Now supports Linux, FreeBSD, and Windows.
4186
4187Disassembler: Added some missing types for the HEST and EINJ tables: "Set
4188Error Type With Address", "CMCI", "MCE", and "Flush Cacheline".
4189
4190iASL/Preprocessor: Implemented full support for nested
4191#if/#else/#elif/#endif blocks. Allows arbitrary depth of nested blocks.
4192
4193Disassembler: Expanded maximum output string length to 64K. Was 256 bytes
4194max. The original purpose of this constraint was to limit the amount of
4195debug output. However, the string function in question (UtPrintString) is
4196now used for the disassembler also, where 256 bytes is insufficient.
4197Reported by RehabMan@GitHub.
4198
4199iASL/DataTables: Fixed some problems and issues with compilation of DMAR
4200tables. ACPICA BZ 999. Lv Zheng.
4201
4202iASL: Fixed a couple of error exit issues that could result in a "Could
4203not delete <file>" message during ASL compilation.
4204
4205AcpiDump: Allow "FADT" and "MADT" as valid table signatures, even though
4206the actual signatures for these tables are "FACP" and "APIC",
4207respectively.
4208
4209AcpiDump: Added support for multiple UEFI tables. Only SSDT and UEFI
4210tables are allowed to have multiple instances.
4211
4212----------------------------------------
421317 May 2013. Summary of changes for version 20130517:
4214
42151) ACPICA kernel-resident subsystem:
4216
4217Fixed a regression introduced in version 20130328 for _INI methods. This
4218change fixes a problem introduced in 20130328 where _INI methods are no
4219longer executed properly because of a memory block that was not
4220initialized correctly. ACPICA BZ 1016. Tomasz Nowicki
4221<tomasz.nowicki@linaro.org>.
4222
4223Fixed a possible problem with the new extended sleep registers in the
4224ACPI
42255.0 FADT. Do not use these registers (even if populated) unless the HW-
4226reduced bit is set in the FADT (as per the ACPI specification). ACPICA BZ
42271020. Lv Zheng.
4228
4229Implemented return value repair code for _CST predefined objects: Sort
4230the
4231list and detect/remove invalid entries. ACPICA BZ 890. Lv Zheng.
4232
4233Implemented a debug-only option to disable loading of SSDTs from the
4234RSDT/XSDT during ACPICA initialization. This can be useful for debugging
4235ACPI problems on some machines. Set AcpiGbl_DisableSsdtTableLoad in
4236acglobal.h - ACPICA BZ 1005. Lv Zheng.
4237
4238Fixed some issues in the ACPICA initialization and termination code:
4239Tomasz Nowicki <tomasz.nowicki@linaro.org>
42401) Clear events initialized flag upon event component termination. ACPICA
4241BZ 1013.
42422) Fixed a possible memory leak in GPE init error path. ACPICA BZ 1018.
42433) Delete global lock pending lock during termination. ACPICA BZ 1012.
42444) Clear debug buffer global on termination to prevent possible multiple
4245delete. ACPICA BZ 1010.
4246
4247Standardized all switch() blocks across the entire source base. After
4248many
4249years, different formatting for switch() had crept in. This change makes
4250the formatting of every switch block identical. ACPICA BZ 997. Chao Guan.
4251
4252Split some files to enhance ACPICA modularity and configurability:
42531) Split buffer dump routines into utilities/utbuffer.c
42542) Split internal error message routines into utilities/uterror.c
42553) Split table print utilities into tables/tbprint.c
42564) Split iASL command-line option processing into asloptions.c
4257
4258Makefile enhancements:
42591) Support for all new files above.
42602) Abort make on errors from any subcomponent. Chao Guan.
42613) Add build support for Apple Mac OS X. Liang Qi.
4262
4263Example Code and Data Size: These are the sizes for the OS-independent
4264acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4265debug version of the code includes the debug output trace mechanism and
4266has a much larger code and data size.
4267
4268  Current Release:
4269    Non-Debug Version:  96.0K Code, 27.0K Data, 123.0K Total
4270    Debug Version:     184.1K Code, 76.8K Data, 260.9K Total
4271  Previous Release:
4272    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
4273    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
4274
4275
42762) iASL Compiler/Disassembler and Tools:
4277
4278New utility: Implemented an easily portable version of the acpidump
4279utility to extract ACPI tables from the system (or a file) in an ASCII
4280hex
4281dump format. The top-level code implements the various command line
4282options, file I/O, and table dump routines. To port to a new host, only
4283three functions need to be implemented to get tables -- since this
4284functionality is OS-dependent. See the tools/acpidump/apmain.c module and
4285the ACPICA reference for porting instructions. ACPICA BZ 859. Notes:
42861) The Windows version obtains the ACPI tables from the Registry.
42872) The Linux version is under development.
42883) Other hosts - If an OS-dependent module is submitted, it will be
4289distributed with ACPICA.
4290
4291iASL: Fixed a regression for -D preprocessor option (define symbol). A
4292restructuring/change to the initialization sequence caused this option to
4293no longer work properly.
4294
4295iASL: Implemented a mechanism to disable specific warnings and remarks.
4296Adds a new command line option, "-vw <messageid> as well as "#pragma
4297disable <messageid>". ACPICA BZ 989. Chao Guan, Bob Moore.
4298
4299iASL: Fix for too-strict package object validation. The package object
4300validation for return values from the predefined names is a bit too
4301strict, it does not allow names references within the package (which will
4302be resolved at runtime.) These types of references cannot be validated at
4303compile time. This change ignores named references within package objects
4304for names that return or define static packages.
4305
4306Debugger: Fixed the 80-character command line limitation for the History
4307command. Now allows lines of arbitrary length. ACPICA BZ 1000. Chao Guan.
4308
4309iASL: Added control method and package support for the -so option
4310(generates AML offset table for BIOS support.)
4311
4312iASL: issue a remark if a non-serialized method creates named objects. If
4313a thread blocks within the method for any reason, and another thread
4314enters the method, the method will fail because an attempt will be made
4315to
4316create the same (named) object twice. In this case, issue a remark that
4317the method should be marked serialized. NOTE: may become a warning later.
4318ACPICA BZ 909.
4319
4320----------------------------------------
432118 April 2013. Summary of changes for version 20130418:
4322
43231) ACPICA kernel-resident subsystem:
4324
4325Fixed a possible buffer overrun during some rare but specific field unit
4326read operations. This overrun can only happen if the DSDT version is 1 --
4327meaning that all AML integers are 32 bits -- and the field length is
4328between 33 and 55 bits long. During the read, an internal buffer object
4329is
4330created for the field unit because the field is larger than an integer
4331(32
4332bits). However, in this case, the buffer will be incorrectly written
4333beyond the end because the buffer length is less than the internal
4334minimum
4335of 64 bits (8 bytes) long. The buffer will be either 5, 6, or 7 bytes
4336long, but a full 8 bytes will be written.
4337
4338Updated the Embedded Controller "orphan" _REG method support. This refers
4339to _REG methods under the EC device that have no corresponding operation
4340region. This is allowed by the ACPI specification. This update removes a
4341dependency on the existence an ECDT table. It will execute an orphan _REG
4342method as long as the operation region handler for the EC is installed at
4343the EC device node and not the namespace root. Rui Zhang (original
4344update), Bob Moore (update/integrate).
4345
4346Implemented run-time argument typechecking for all predefined ACPI names
4347(_STA, _BIF, etc.) This change performs object typechecking on all
4348incoming arguments for all predefined names executed via
4349AcpiEvaluateObject. This ensures that ACPI-related device drivers are
4350passing correct object types as well as the correct number of arguments
4351(therefore identifying any issues immediately). Also, the ASL/namespace
4352definition of the predefined name is checked against the ACPI
4353specification for the proper argument count. Adds one new file,
4354nsarguments.c
4355
4356Changed an exception code for the ASL UnLoad() operator. Changed the
4357exception code for the case where the input DdbHandle is invalid, from
4358AE_BAD_PARAMETER to the more appropriate AE_AML_OPERAND_TYPE.
4359
4360Unix/Linux makefiles: Removed the use of the -O2 optimization flag in the
4361global makefile. The use of this flag causes compiler errors on earlier
4362versions of GCC, so it has been removed for compatibility.
4363
4364Miscellaneous cleanup:
43651) Removed some unused/obsolete macros
43662) Fixed a possible memory leak in the _OSI support
43673) Removed an unused variable in the predefined name support
43684) Windows OSL: remove obsolete reference to a memory list field
4369
4370Example Code and Data Size: These are the sizes for the OS-independent
4371acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4372debug version of the code includes the debug output trace mechanism and
4373has a much larger code and data size.
4374
4375  Current Release:
4376    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
4377    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
4378  Previous Release:
4379    Non-Debug Version:  95.6K Code, 26.8K Data, 122.4K Total
4380    Debug Version:     183.5K Code, 76.6K Data, 260.1K Total
4381
4382
43832) iASL Compiler/Disassembler and Tools:
4384
4385AcpiExec: Added installation of a handler for the SystemCMOS address
4386space. This prevents control method abort if a method accesses this
4387space.
4388
4389AcpiExec: Added support for multiple EC devices, and now install EC
4390operation region handler(s) at the actual EC device instead of the
4391namespace root. This reflects the typical behavior of host operating
4392systems.
4393
4394AcpiExec: Updated to ensure that all operation region handlers are
4395installed before the _REG methods are executed. This prevents a _REG
4396method from aborting if it accesses an address space has no handler.
4397AcpiExec installs a handler for every possible address space.
4398
4399Debugger: Enhanced the "handlers" command to display non-root handlers.
4400This change enhances the handlers command to display handlers associated
4401with individual devices throughout the namespace, in addition to the
4402currently supported display of handlers associated with the root
4403namespace
4404node.
4405
4406ASL Test Suite: Several test suite errors have been identified and
4407resolved, reducing the total error count during execution. Chao Guan.
4408
4409----------------------------------------
441028 March 2013. Summary of changes for version 20130328:
4411
44121) ACPICA kernel-resident subsystem:
4413
4414Fixed several possible race conditions with the internal object reference
4415counting mechanism. Some of the external ACPICA interfaces update object
4416reference counts without holding the interpreter or namespace lock. This
4417change adds a spinlock to protect reference count updates on the internal
4418ACPICA objects. Reported by and with assistance from Andriy Gapon
4419(avg@FreeBSD.org).
4420
4421FADT support: Removed an extraneous warning for very large GPE register
4422sets. This change removes a size mismatch warning if the legacy length
4423field for a GPE register set is larger than the 64-bit GAS structure can
4424accommodate. GPE register sets can be larger than the 255-bit width
4425limitation of the GAS structure. Linn Crosetto (linn@hp.com).
4426
4427_OSI Support: handle any errors from AcpiOsAcquireMutex. Check for error
4428return from this interface. Handles a possible timeout case if
4429ACPI_WAIT_FOREVER is modified by the host to be a value less than
4430"forever". Jung-uk Kim.
4431
4432Predefined name support: Add allowed/required argument type information
4433to
4434the master predefined info table. This change adds the infrastructure to
4435enable typechecking on incoming arguments for all predefined
4436methods/objects. It does not actually contain the code that will fully
4437utilize this information, this is still under development. Also condenses
4438some duplicate code for the predefined names into a new module,
4439utilities/utpredef.c
4440
4441Example Code and Data Size: These are the sizes for the OS-independent
4442acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4443debug version of the code includes the debug output trace mechanism and
4444has a much larger code and data size.
4445
4446  Previous Release:
4447    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
4448    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
4449  Current Release:
4450    Non-Debug Version:  95.2K Code, 26.4K Data, 121.6K Total
4451    Debug Version:     183.0K Code, 76.0K Data, 259.0K Total
4452
4453
44542) iASL Compiler/Disassembler and Tools:
4455
4456iASL: Implemented a new option to simplify the development of ACPI-
4457related
4458BIOS code. Adds support for a new "offset table" output file. The -so
4459option will create a C table containing the AML table offsets of various
4460named objects in the namespace so that BIOS code can modify them easily
4461at
4462boot time. This can simplify BIOS runtime code by eliminating expensive
4463searches for "magic values", enhancing boot times and adding greater
4464reliability. With assistance from Lee Hamel.
4465
4466iASL: Allow additional predefined names to return zero-length packages.
4467Now, all predefined names that are defined by the ACPI specification to
4468return a "variable-length package of packages" are allowed to return a
4469zero length top-level package. This allows the BIOS to tell the host that
4470the requested feature is not supported, and supports existing BIOS/ASL
4471code and practices.
4472
4473iASL: Changed the "result not used" warning to an error. This is the case
4474where an ASL operator is effectively a NOOP because the result of the
4475operation is not stored anywhere. For example:
4476    Add (4, Local0)
4477There is no target (missing 3rd argument), nor is the function return
4478value used. This is potentially a very serious problem -- since the code
4479was probably intended to do something, but for whatever reason, the value
4480was not stored. Therefore, this issue has been upgraded from a warning to
4481an error.
4482
4483AcpiHelp: Added allowable/required argument types to the predefined names
4484info display. This feature utilizes the recent update to the predefined
4485names table (above).
4486
4487----------------------------------------
448814 February 2013. Summary of changes for version 20130214:
4489
44901) ACPICA Kernel-resident Subsystem:
4491
4492Fixed a possible regression on some hosts: Reinstated the safe return
4493macros (return_ACPI_STATUS, etc.) that ensure that the argument is
4494evaluated only once. Although these macros are not needed for the ACPICA
4495code itself, they are often used by ACPI-related host device drivers
4496where
4497the safe feature may be necessary.
4498
4499Fixed several issues related to the ACPI 5.0 reduced hardware support
4500(SOC): Now ensure that if the platform declares itself as hardware-
4501reduced
4502via the FADT, the following functions become NOOPs (and always return
4503AE_OK) because ACPI is always enabled by definition on these machines:
4504  AcpiEnable
4505  AcpiDisable
4506  AcpiHwGetMode
4507  AcpiHwSetMode
4508
4509Dynamic Object Repair: Implemented additional runtime repairs for
4510predefined name return values. Both of these repairs can simplify code in
4511the related device drivers that invoke these methods:
45121) For the _STR and _MLS names, automatically repair/convert an ASCII
4513string to a Unicode buffer.
45142) For the _CRS, _PRS, and _DMA names, return a resource descriptor with
4515a
4516lone end tag descriptor in the following cases: A Return(0) was executed,
4517a null buffer was returned, or no object at all was returned (non-slack
4518mode only). Adds a new file, nsconvert.c
4519ACPICA BZ 998. Bob Moore, Lv Zheng.
4520
4521Resource Manager: Added additional code to prevent possible infinite
4522loops
4523while traversing corrupted or ill-formed resource template buffers. Check
4524for zero-length resource descriptors in all code that loops through
4525resource templates (the length field is used to index through the
4526template). This change also hardens the external AcpiWalkResources and
4527AcpiWalkResourceBuffer interfaces.
4528
4529Local Cache Manager: Enhanced the main data structure to eliminate an
4530unnecessary mechanism to access the next object in the list. Actually
4531provides a small performance enhancement for hosts that use the local
4532ACPICA cache manager. Jung-uk Kim.
4533
4534Example Code and Data Size: These are the sizes for the OS-independent
4535acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4536debug version of the code includes the debug output trace mechanism and
4537has a much larger code and data size.
4538
4539  Previous Release:
4540    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
4541    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
4542  Current Release:
4543    Non-Debug Version:  95.0K Code, 25.9K Data, 120.9K Total
4544    Debug Version:     182.9K Code, 75.6K Data, 258.5K Total
4545
4546
45472) iASL Compiler/Disassembler and Tools:
4548
4549iASL/Disassembler: Fixed several issues with the definition of the ACPI
45505.0 RASF table (RAS Feature Table). This change incorporates late changes
4551that were made to the ACPI 5.0 specification.
4552
4553iASL/Disassembler: Added full support for the following new ACPI tables:
4554  1) The MTMR table (MID Timer Table)
4555  2) The VRTC table (Virtual Real Time Clock Table).
4556Includes header file, disassembler, table compiler, and template support
4557for both tables.
4558
4559iASL: Implemented compile-time validation of package objects returned by
4560predefined names. This new feature validates static package objects
4561returned by the various predefined names defined to return packages. Both
4562object types and package lengths are validated, for both parent packages
4563and sub-packages, if any. The code is similar in structure and behavior
4564to
4565the runtime repair mechanism within the AML interpreter and uses the
4566existing predefined name information table. Adds a new file, aslprepkg.c.
4567ACPICA BZ 938.
4568
4569iASL: Implemented auto-detection of binary ACPI tables for disassembly.
4570This feature detects a binary file with a valid ACPI table header and
4571invokes the disassembler automatically. Eliminates the need to
4572specifically invoke the disassembler with the -d option. ACPICA BZ 862.
4573
4574iASL/Disassembler: Added several warnings for the case where there are
4575unresolved control methods during the disassembly. This can potentially
4576cause errors when the output file is compiled, because the disassembler
4577assumes zero method arguments in these cases (it cannot determine the
4578actual number of arguments without resolution/definition of the method).
4579
4580Debugger: Added support to display all resources with a single command.
4581Invocation of the resources command with no arguments will now display
4582all
4583resources within the current namespace.
4584
4585AcpiHelp: Added descriptive text for each ACPICA exception code displayed
4586via the -e option.
4587
4588----------------------------------------
458917 January 2013. Summary of changes for version 20130117:
4590
45911) ACPICA Kernel-resident Subsystem:
4592
4593Updated the AcpiGetSleepTypeData interface: Allow the \_Sx methods to
4594return either 1 or 2 integers. Although the ACPI spec defines the \_Sx
4595objects to return a package containing one integer, most BIOS code
4596returns
4597two integers and the previous code reflects that. However, we also need
4598to
4599support BIOS code that actually implements to the ACPI spec, and this
4600change reflects this.
4601
4602Fixed two issues with the ACPI_DEBUG_PRINT macros:
46031) Added the ACPI_DO_WHILE macro to the main DEBUG_PRINT helper macro for
4604C compilers that require this support.
46052) Renamed the internal ACPI_DEBUG macro to ACPI_DO_DEBUG_PRINT since
4606ACPI_DEBUG is already used by many of the various hosts.
4607
4608Updated all ACPICA copyrights and signons to 2013. Added the 2013
4609copyright to all module headers and signons, including the standard Linux
4610header. This affects virtually every file in the ACPICA core subsystem,
4611iASL compiler, all ACPICA utilities, and the test suites.
4612
4613Example Code and Data Size: These are the sizes for the OS-independent
4614acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4615debug version of the code includes the debug output trace mechanism and
4616has a much larger code and data size.
4617
4618  Previous Release:
4619    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
4620    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
4621  Current Release:
4622    Non-Debug Version:  94.5K Code, 25.4K Data, 119.9K Total
4623    Debug Version:     182.3K Code, 75.0K Data, 257.3K Total
4624
4625
46262) iASL Compiler/Disassembler and Tools:
4627
4628Generic Unix OSL: Use a buffer to eliminate multiple vfprintf()s and
4629prevent a possible fault on some hosts. Some C libraries modify the arg
4630pointer parameter to vfprintf making it difficult to call it twice in the
4631AcpiOsVprintf function. Use a local buffer to workaround this issue. This
4632does not affect the Windows OSL since the Win C library does not modify
4633the arg pointer. Chao Guan, Bob Moore.
4634
4635iASL: Fixed a possible infinite loop when the maximum error count is
4636reached. If an output file other than the .AML file is specified (such as
4637a listing file), and the maximum number of errors is reached, do not
4638attempt to flush data to the output file(s) as the compiler is aborting.
4639This can cause an infinite loop as the max error count code essentially
4640keeps calling itself.
4641
4642iASL/Disassembler: Added an option (-in) to ignore NOOP
4643opcodes/operators.
4644Implemented for both the compiler and the disassembler. Often, the NOOP
4645opcode is used as padding for packages that are changed dynamically by
4646the
4647BIOS. When disassembled and recompiled, these NOOPs will cause syntax
4648errors. This option causes the disassembler to ignore all NOOP opcodes
4649(0xA3), and it also causes the compiler to ignore all ASL source code
4650NOOP
4651statements as well.
4652
4653Debugger: Enhanced the Sleep command to execute all sleep states. This
4654change allows Sleep to be invoked with no arguments and causes the
4655debugger to execute all of the sleep states, 0-5, automatically.
4656
4657----------------------------------------
465820 December 2012. Summary of changes for version 20121220:
4659
46601) ACPICA Kernel-resident Subsystem:
4661
4662Implemented a new interface, AcpiWalkResourceBuffer. This interface is an
4663alternate entry point for AcpiWalkResources and improves the usability of
4664the resource manager by accepting as input a buffer containing the output
4665of either a _CRS, _PRS, or _AEI method. The key functionality is that the
4666input buffer is not deleted by this interface so that it can be used by
4667the host later. See the ACPICA reference for details.
4668
4669Interpreter: Add a warning if a 64-bit constant appears in a 32-bit table
4670(DSDT version < 2). The constant will be truncated and this warning
4671reflects that behavior.
4672
4673Resource Manager: Add support for the new ACPI 5.0 wake bit in the IRQ,
4674ExtendedInterrupt, and GpioInt descriptors. This change adds support to
4675both get and set the new wake bit in these descriptors, separately from
4676the existing share bit. Reported by Aaron Lu.
4677
4678Interpreter: Fix Store() when an implicit conversion is not possible. For
4679example, in the cases such as a store of a string to an existing package
4680object, implement the store as a CopyObject(). This is a small departure
4681from the ACPI specification which states that the control method should
4682be
4683aborted in this case. However, the ASLTS suite depends on this behavior.
4684
4685Performance improvement for the various FUNCTION_TRACE and DEBUG_PRINT
4686macros: check if debug output is currently enabled as soon as possible to
4687minimize performance impact if debug is in fact not enabled.
4688
4689Source code restructuring: Cleanup to improve modularity. The following
4690new files have been added: dbconvert.c, evhandler.c, nsprepkg.c,
4691psopinfo.c, psobject.c, rsdumpinfo.c, utstring.c, and utownerid.c.
4692Associated makefiles and project files have been updated.
4693
4694Changed an exception code for LoadTable operator. For the case where one
4695of the input strings is too long, change the returned exception code from
4696AE_BAD_PARAMETER to AE_AML_STRING_LIMIT.
4697
4698Fixed a possible memory leak in dispatcher error path. On error, delete
4699the mutex object created during method mutex creation. Reported by
4700tim.gardner@canonical.com.
4701
4702Example Code and Data Size: These are the sizes for the OS-independent
4703acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4704debug version of the code includes the debug output trace mechanism and
4705has a much larger code and data size.
4706
4707  Previous Release:
4708    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
4709    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
4710  Current Release:
4711    Non-Debug Version:  94.5K Code, 25.5K Data, 120.0K Total
4712    Debug Version:     182.2K Code, 74.9K Data, 257.1K Total
4713
4714
47152) iASL Compiler/Disassembler and Tools:
4716
4717iASL: Disallow a method call as argument to the ObjectType ASL operator.
4718This change tracks an errata to the ACPI 5.0 document. The AML grammar
4719will not allow the interpreter to differentiate between a method and a
4720method invocation when these are used as an argument to the ObjectType
4721operator. The ACPI specification change is to disallow a method
4722invocation
4723(UserTerm) for the ObjectType operator.
4724
4725Finish support for the TPM2 and CSRT tables in the headers, table
4726compiler, and disassembler.
4727
4728Unix user-space OSL: Fix a problem with WaitSemaphore where the timeout
4729always expires immediately if the semaphore is not available. The
4730original
4731code was using a relative-time timeout, but sem_timedwait requires the
4732use
4733of an absolute time.
4734
4735iASL: Added a remark if the Timer() operator is used within a 32-bit
4736table. This operator returns a 64-bit time value that will be truncated
4737within a 32-bit table.
4738
4739iASL Source code restructuring: Cleanup to improve modularity. The
4740following new files have been added: aslhex.c, aslxref.c, aslnamesp.c,
4741aslmethod.c, and aslfileio.c. Associated makefiles and project files have
4742been updated.
4743
4744
4745----------------------------------------
474614 November 2012. Summary of changes for version 20121114:
4747
47481) ACPICA Kernel-resident Subsystem:
4749
4750Implemented a performance enhancement for ACPI/AML Package objects. This
4751change greatly increases the performance of Package objects within the
4752interpreter. It changes the processing of reference counts for packages
4753by
4754optimizing for the most common case where the package sub-objects are
4755either Integers, Strings, or Buffers. Increases the overall performance
4756of
4757the ASLTS test suite by 1.5X (Increases the Slack Mode performance by
47582X.)
4759Chao Guan. ACPICA BZ 943.
4760
4761Implemented and deployed common macros to extract flag bits from resource
4762descriptors. Improves readability and maintainability of the code. Fixes
4763a
4764problem with the UART serial bus descriptor for the number of data bits
4765flags (was incorrectly 2 bits, should be 3).
4766
4767Enhanced the ACPI_GETx and ACPI_SETx macros. Improved the implementation
4768of the macros and changed the SETx macros to the style of (destination,
4769source). Also added ACPI_CASTx companion macros. Lv Zheng.
4770
4771Example Code and Data Size: These are the sizes for the OS-independent
4772acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4773debug version of the code includes the debug output trace mechanism and
4774has a much larger code and data size.
4775
4776  Previous Release:
4777    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
4778    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
4779  Current Release:
4780    Non-Debug Version:  94.3K Code, 25.3K Data, 119.6K Total
4781    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
4782
4783
47842) iASL Compiler/Disassembler and Tools:
4785
4786Disassembler: Added the new ACPI 5.0 interrupt sharing flags. This change
4787adds the ShareAndWake and ExclusiveAndWake flags which were added to the
4788Irq, Interrupt, and Gpio resource descriptors in ACPI 5.0. ACPICA BZ 986.
4789
4790Disassembler: Fixed a problem with external declaration generation. Fixes
4791a problem where an incorrect pathname could be generated for an external
4792declaration if the original reference to the object includes leading
4793carats (^). ACPICA BZ 984.
4794
4795Debugger: Completed a major update for the Disassemble<method> command.
4796This command was out-of-date and did not properly disassemble control
4797methods that had any reasonable complexity. This fix brings the command
4798up
4799to the same level as the rest of the disassembler. Adds one new file,
4800dmdeferred.c, which is existing code that is now common with the main
4801disassembler and the debugger disassemble command. ACPICA MZ 978.
4802
4803iASL: Moved the parser entry prototype to avoid a duplicate declaration.
4804Newer versions of Bison emit this prototype, so moved the prototype out
4805of
4806the iASL header to where it is actually used in order to avoid a
4807duplicate
4808declaration.
4809
4810iASL/Tools: Standardized use of the stream I/O functions:
4811  1) Ensure check for I/O error after every fopen/fread/fwrite
4812  2) Ensure proper order of size/count arguments for fread/fwrite
4813  3) Use test of (Actual != Requested) after all fwrite, and most fread
4814  4) Standardize I/O error messages
4815Improves reliability and maintainability of the code. Bob Moore, Lv
4816Zheng.
4817ACPICA BZ 981.
4818
4819Disassembler: Prevent duplicate External() statements. During generation
4820of external statements, detect similar pathnames that are actually
4821duplicates such as these:
4822  External (\ABCD)
4823  External (ABCD)
4824Remove all leading '\' characters from pathnames during the external
4825statement generation so that duplicates will be detected and tossed.
4826ACPICA BZ 985.
4827
4828Tools: Replace low-level I/O with stream I/O functions. Replace
4829open/read/write/close with the stream I/O equivalents
4830fopen/fread/fwrite/fclose for portability and performance. Lv Zheng, Bob
4831Moore.
4832
4833AcpiBin: Fix for the dump-to-hex function. Now correctly output the table
4834name header so that AcpiXtract recognizes the output file/table.
4835
4836iASL: Remove obsolete -2 option flag. Originally intended to force the
4837compiler/disassembler into an ACPI 2.0 mode, this was never implemented
4838and the entire concept is now obsolete.
4839
4840----------------------------------------
484118 October 2012. Summary of changes for version 20121018:
4842
4843
48441) ACPICA Kernel-resident Subsystem:
4845
4846Updated support for the ACPI 5.0 MPST table. Fixes some problems
4847introduced by late changes to the table as it was added to the ACPI 5.0
4848specification. Includes header, disassembler, and data table compiler
4849support as well as a new version of the MPST template.
4850
4851AcpiGetObjectInfo: Enhanced the device object support to include the ACPI
48525.0 _SUB method. Now calls _SUB in addition to the other PNP-related ID
4853methods: _HID, _CID, and _UID.
4854
4855Changed ACPI_DEVICE_ID to ACPI_PNP_DEVICE_ID. Also changed
4856ACPI_DEVICE_ID_LIST to ACPI_PNP_DEVICE_ID_LIST. These changes prevent
4857name collisions on hosts that reserve the *_DEVICE_ID (or *DeviceId)
4858names for their various drivers. Affects the AcpiGetObjectInfo external
4859interface, and other internal interfaces as well.
4860
4861Added and deployed a new macro for ACPI_NAME management: ACPI_MOVE_NAME.
4862This macro resolves to a simple 32-bit move of the 4-character ACPI_NAME
4863on machines that support non-aligned transfers. Optimizes for this case
4864rather than using a strncpy. With assistance from Zheng Lv.
4865
4866Resource Manager: Small fix for buffer size calculation. Fixed a one byte
4867error in the output buffer calculation. Feng Tang. ACPICA BZ 849.
4868
4869Added a new debug print message for AML mutex objects that are force-
4870released. At control method termination, any currently acquired mutex
4871objects are force-released. Adds a new debug-only message for each one
4872that is released.
4873
4874Audited/updated all ACPICA return macros and the function debug depth
4875counter: 1) Ensure that all functions that use the various TRACE macros
4876also use the appropriate ACPICA return macros. 2) Ensure that all normal
4877return statements surround the return expression (value) with parens to
4878ensure consistency across the ACPICA code base. Guan Chao, Tang Feng,
4879Zheng Lv, Bob Moore. ACPICA Bugzilla 972.
4880
4881Global source code changes/maintenance: All extra lines at the start and
4882end of each source file have been removed for consistency. Also, within
4883comments, all new sentences start with a single space instead of a double
4884space, again for consistency across the code base.
4885
4886Example Code and Data Size: These are the sizes for the OS-independent
4887acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4888debug version of the code includes the debug output trace mechanism and
4889has a much larger code and data size.
4890
4891  Previous Release:
4892    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
4893    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
4894  Current Release:
4895    Non-Debug Version:  93.9K Code, 25.2K Data, 119.1K Total
4896    Debug Version:     175.5K Code, 74.5K Data, 250.0K Total
4897
4898
48992) iASL Compiler/Disassembler and Tools:
4900
4901AcpiExec: Improved the algorithm used for memory leak/corruption
4902detection. Added some intelligence to the code that maintains the global
4903list of allocated memory. The list is now ordered by allocated memory
4904address, significantly improving performance. When running AcpiExec on
4905the ASLTS test suite, speed improvements of 3X to 5X are seen, depending
4906on the platform and/or the environment. Note, this performance
4907enhancement affects the AcpiExec utility only, not the kernel-resident
4908ACPICA code.
4909
4910Enhanced error reporting for invalid AML opcodes and bad ACPI_NAMEs. For
4911the disassembler, dump the 48 bytes surrounding the invalid opcode. Fix
4912incorrect table offset reported for invalid opcodes. Report the original
491332-bit value for bad ACPI_NAMEs (as well as the repaired name.)
4914
4915Disassembler: Enhanced the -vt option to emit the binary table data in
4916hex format to assist with debugging.
4917
4918Fixed a potential filename buffer overflow in osunixdir.c. Increased the
4919size of file structure. Colin Ian King.
4920
4921----------------------------------------
492213 September 2012. Summary of changes for version 20120913:
4923
4924
49251) ACPICA Kernel-resident Subsystem:
4926
4927ACPI 5.0: Added two new notify types for the Hardware Error Notification
4928Structure within the Hardware Error Source Table (HEST) table -- CMCI(5)
4929and
4930MCE(6).
4931
4932Table Manager: Merged/removed duplicate code in the root table resize
4933functions. One function is external, the other is internal. Lv Zheng,
4934ACPICA
4935BZ 846.
4936
4937Makefiles: Completely removed the obsolete "Linux" makefiles under
4938acpica/generate/linux. These makefiles are obsolete and have been
4939replaced
4940by
4941the generic unix makefiles under acpica/generate/unix.
4942
4943Makefiles: Ensure that binary files always copied properly. Minor rule
4944change
4945to ensure that the final binary output files are always copied up to the
4946appropriate binary directory (bin32 or bin64.)
4947
4948Example Code and Data Size: These are the sizes for the OS-independent
4949acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
4950debug
4951version of the code includes the debug output trace mechanism and has a
4952much
4953larger code and data size.
4954
4955  Previous Release:
4956    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
4957    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
4958  Current Release:
4959    Non-Debug Version:  93.7K Code, 25.3K Data, 119.0K Total
4960    Debug Version:     175.0K Code, 74.4K Data, 249.4K Total
4961
4962
49632) iASL Compiler/Disassembler and Tools:
4964
4965Disassembler: Fixed a possible fault during the disassembly of resource
4966descriptors when a second parse is required because of the invocation of
4967external control methods within the table. With assistance from
4968adq@lidskialf.net. ACPICA BZ 976.
4969
4970iASL: Fixed a namepath optimization problem. An error can occur if the
4971parse
4972node that contains the namepath to be optimized does not have a parent
4973node
4974that is a named object. This change fixes the problem.
4975
4976iASL: Fixed a regression where the AML file is not deleted on errors. The
4977AML
4978output file should be deleted if there are any errors during the
4979compiler.
4980The
4981only exception is if the -f (force output) option is used. ACPICA BZ 974.
4982
4983iASL: Added a feature to automatically increase internal line buffer
4984sizes.
4985Via realloc(), automatically increase the internal line buffer sizes as
4986necessary to support very long source code lines. The current version of
4987the
4988preprocessor requires a buffer long enough to contain full source code
4989lines.
4990This change increases the line buffer(s) if the input lines go beyond the
4991current buffer size. This eliminates errors that occurred when a source
4992code
4993line was longer than the buffer.
4994
4995iASL: Fixed a problem with constant folding in method declarations. The
4996SyncLevel term is a ByteConstExpr, and incorrect code would be generated
4997if a
4998Type3 opcode was used.
4999
5000Debugger: Improved command help support. For incorrect argument count,
5001display
5002full help for the command. For help command itself, allow an argument to
5003specify a command.
5004
5005Test Suites: Several bug fixes for the ASLTS suite reduces the number of
5006errors during execution of the suite. Guan Chao.
5007
5008----------------------------------------
500916 August 2012. Summary of changes for version 20120816:
5010
5011
50121) ACPICA Kernel-resident Subsystem:
5013
5014Removed all use of the deprecated _GTS and _BFS predefined methods. The
5015_GTS
5016(Going To Sleep) and _BFS (Back From Sleep) methods are essentially
5017deprecated and will probably be removed from the ACPI specification.
5018Windows
5019does not invoke them, and reportedly never will. The final nail in the
5020coffin
5021is that the ACPI specification states that these methods must be run with
5022interrupts off, which is not going to happen in a kernel interpreter.
5023Note:
5024Linux has removed all use of the methods also. It was discovered that
5025invoking these functions caused failures on some machines, probably
5026because
5027they were never tested since Windows does not call them. Affects two
5028external
5029interfaces, AcpiEnterSleepState and AcpiLeaveSleepStatePrep. Tang Feng.
5030ACPICA BZ 969.
5031
5032Implemented support for complex bit-packed buffers returned from the _PLD
5033(Physical Location of Device) predefined method. Adds a new external
5034interface, AcpiDecodePldBuffer that parses the buffer into a more usable
5035C
5036structure. Note: C Bitfields cannot be used for this type of predefined
5037structure since the memory layout of individual bitfields is not defined
5038by
5039the C language. In addition, there are endian concerns where a compiler
5040will
5041change the bitfield ordering based on the machine type. The new ACPICA
5042interface eliminates these issues, and should be called after _PLD is
5043executed. ACPICA BZ 954.
5044
5045Implemented a change to allow a scope change to root (via "Scope (\)")
5046during
5047execution of module-level ASL code (code that is executed at table load
5048time.) Lin Ming.
5049
5050Added the Windows8/Server2012 string for the _OSI method. This change
5051adds
5052a
5053new _OSI string, "Windows 2012" for both Windows 8 and Windows Server
50542012.
5055
5056Added header support for the new ACPI tables DBG2 (Debug Port Table Type
50572)
5058and CSRT (Core System Resource Table).
5059
5060Added struct header support for the _FDE, _GRT, _GTM, and _SRT predefined
5061names. This simplifies access to the buffers returned by these predefined
5062names. Adds a new file, include/acbuffer.h. ACPICA BZ 956.
5063
5064GPE support: Removed an extraneous parameter from the various low-level
5065internal GPE functions. Tang Feng.
5066
5067Removed the linux makefiles from the unix packages. The generate/linux
5068makefiles are obsolete and have been removed from the unix tarball
5069release
5070packages. The replacement makefiles are under generate/unix, and there is
5071a
5072top-level makefile under the main acpica directory. ACPICA BZ 967, 912.
5073
5074Updates for Unix makefiles:
50751) Add -D_FORTIFY_SOURCE=2 for gcc generation. Arjan van de Ven.
50762) Update linker flags (move to end of command line) for AcpiExec
5077utility.
5078Guan Chao.
5079
5080Split ACPICA initialization functions to new file, utxfinit.c. Split from
5081utxface.c to improve modularity and reduce file size.
5082
5083Example Code and Data Size: These are the sizes for the OS-independent
5084acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5085debug version of the code includes the debug output trace mechanism and
5086has a
5087much larger code and data size.
5088
5089  Previous Release:
5090    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
5091    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
5092  Current Release:
5093    Non-Debug Version:  93.8K Code, 25.3K Data, 119.1K Total
5094    Debug Version:     175.7K Code, 74.8K Data, 250.5K Total
5095
5096
50972) iASL Compiler/Disassembler and Tools:
5098
5099iASL: Fixed a problem with constant folding for fixed-length constant
5100expressions. The constant-folding code was not being invoked for constant
5101expressions that allow the use of type 3/4/5 opcodes to generate
5102constants
5103for expressions such as ByteConstExpr, WordConstExpr, etc. This could
5104result
5105in the generation of invalid AML bytecode. ACPICA BZ 970.
5106
5107iASL: Fixed a generation issue on newer versions of Bison. Newer versions
5108apparently automatically emit some of the necessary externals. This
5109change
5110handles these versions in order to eliminate generation warnings.
5111
5112Disassembler: Added support to decode the DBG2 and CSRT ACPI tables.
5113
5114Disassembler: Add support to decode _PLD buffers. The decoded buffer
5115appears
5116within comments in the output file.
5117
5118Debugger: Fixed a regression with the "Threads" command where
5119AE_BAD_PARAMETER was always returned.
5120
5121----------------------------------------
512211 July 2012. Summary of changes for version 20120711:
5123
51241) ACPICA Kernel-resident Subsystem:
5125
5126Fixed a possible fault in the return package object repair code. Fixes a
5127problem that can occur when a lone package object is wrapped with an
5128outer
5129package object in order to force conformance to the ACPI specification.
5130Can
5131affect these predefined names: _ALR, _MLS, _PSS, _TRT, _TSS, _PRT, _HPX,
5132_DLM,
5133_CSD, _PSD, _TSD.
5134
5135Removed code to disable/enable bus master arbitration (ARB_DIS bit in the
5136PM2_CNT register) in the ACPICA sleep/wake interfaces. Management of the
5137ARB_DIS bit must be implemented in the host-dependent C3 processor power
5138state
5139support. Note, ARB_DIS is obsolete and only applies to older chipsets,
5140both
5141Intel and other vendors. (for Intel: ICH4-M and earlier)
5142
5143This change removes the code to disable/enable bus master arbitration
5144during
5145suspend/resume. Use of the ARB_DIS bit in the optional PM2_CNT register
5146causes
5147resume problems on some machines. The change has been in use for over
5148seven
5149years within Linux.
5150
5151Implemented two new external interfaces to support host-directed dynamic
5152ACPI
5153table load and unload. They are intended to simplify the host
5154implementation
5155of hot-plug support:
5156  AcpiLoadTable: Load an SSDT from a buffer into the namespace.
5157  AcpiUnloadParentTable: Unload an SSDT via a named object owned by the
5158table.
5159See the ACPICA reference for additional details. Adds one new file,
5160components/tables/tbxfload.c
5161
5162Implemented and deployed two new interfaces for errors and warnings that
5163are
5164known to be caused by BIOS/firmware issues:
5165  AcpiBiosError: Prints "ACPI Firmware Error" message.
5166  AcpiBiosWarning: Prints "ACPI Firmware Warning" message.
5167Deployed these new interfaces in the ACPICA Table Manager code for ACPI
5168table
5169and FADT errors. Additional deployment to be completed as appropriate in
5170the
5171future. The associated conditional macros are ACPI_BIOS_ERROR and
5172ACPI_BIOS_WARNING. See the ACPICA reference for additional details.
5173ACPICA
5174BZ
5175843.
5176
5177Implicit notify support: ensure that no memory allocation occurs within a
5178critical region. This fix moves a memory allocation outside of the time
5179that a
5180spinlock is held. Fixes issues on systems that do not allow this
5181behavior.
5182Jung-uk Kim.
5183
5184Split exception code utilities and tables into a new file,
5185utilities/utexcep.c
5186
5187Example Code and Data Size: These are the sizes for the OS-independent
5188acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5189debug
5190version of the code includes the debug output trace mechanism and has a
5191much
5192larger code and data size.
5193
5194  Previous Release:
5195    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
5196    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
5197  Current Release:
5198    Non-Debug Version:  93.5K Code, 25.3K Data, 118.8K Total
5199    Debug Version:     173.7K Code, 74.0K Data, 247.7K Total
5200
5201
52022) iASL Compiler/Disassembler and Tools:
5203
5204iASL: Fixed a parser problem for hosts where EOF is defined as -1 instead
5205of
52060. Jung-uk Kim.
5207
5208Debugger: Enhanced the "tables" command to emit additional information
5209about
5210the current set of ACPI tables, including the owner ID and flags decode.
5211
5212Debugger: Reimplemented the "unload" command to use the new
5213AcpiUnloadParentTable external interface. This command was disable
5214previously
5215due to need for an unload interface.
5216
5217AcpiHelp: Added a new option to decode ACPICA exception codes. The -e
5218option
5219will decode 16-bit hex status codes (ACPI_STATUS) to name strings.
5220
5221----------------------------------------
522220 June 2012. Summary of changes for version 20120620:
5223
5224
52251) ACPICA Kernel-resident Subsystem:
5226
5227Implemented support to expand the "implicit notify" feature to allow
5228multiple
5229devices to be notified by a single GPE. This feature automatically
5230generates a
5231runtime device notification in the absence of a BIOS-provided GPE control
5232method (_Lxx/_Exx) or a host-installed handler for the GPE. Implicit
5233notify is
5234provided by ACPICA for Windows compatibility, and is a workaround for
5235BIOS
5236AML
5237code errors. See the description of the AcpiSetupGpeForWake interface in
5238the
5239APCICA reference. Bob Moore, Rafael Wysocki. ACPICA BZ 918.
5240
5241Changed some comments and internal function names to simplify and ensure
5242correctness of the Linux code translation. No functional changes.
5243
5244Example Code and Data Size: These are the sizes for the OS-independent
5245acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5246debug
5247version of the code includes the debug output trace mechanism and has a
5248much
5249larger code and data size.
5250
5251  Previous Release:
5252    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
5253    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
5254  Current Release:
5255    Non-Debug Version:  93.1K Code, 25.1K Data, 118.2K Total
5256    Debug Version:     172.9K Code, 73.6K Data, 246.5K Total
5257
5258
52592) iASL Compiler/Disassembler and Tools:
5260
5261Disassembler: Added support to emit short, commented descriptions for the
5262ACPI
5263predefined names in order to improve the readability of the disassembled
5264output. ACPICA BZ 959. Changes include:
5265  1) Emit descriptions for all standard predefined names (_INI, _STA,
5266_PRW,
5267etc.)
5268  2) Emit generic descriptions for the special names (_Exx, _Qxx, etc.)
5269  3) Emit descriptions for the resource descriptor names (_MIN, _LEN,
5270etc.)
5271
5272AcpiSrc: Fixed several long-standing Linux code translation issues.
5273Argument
5274descriptions in function headers are now translated properly to lower
5275case
5276and
5277underscores. ACPICA BZ 961. Also fixes translation problems such as
5278these:
5279(old -> new)
5280  i_aSL -> iASL
5281  00-7_f -> 00-7F
5282  16_k -> 16K
5283  local_fADT -> local_FADT
5284  execute_oSI -> execute_OSI
5285
5286iASL: Fixed a problem where null bytes were inadvertently emitted into
5287some
5288listing files.
5289
5290iASL: Added the existing debug options to the standard help screen. There
5291are
5292no longer two different help screens. ACPICA BZ 957.
5293
5294AcpiHelp: Fixed some typos in the various predefined name descriptions.
5295Also
5296expand some of the descriptions where appropriate.
5297
5298iASL: Fixed the -ot option (display compile times/statistics). Was not
5299working
5300properly for standard output; only worked for the debug file case.
5301
5302----------------------------------------
530318 May 2012. Summary of changes for version 20120518:
5304
5305
53061) ACPICA Core Subsystem:
5307
5308Added a new OSL interface, AcpiOsWaitEventsComplete. This interface is
5309defined
5310to block until asynchronous events such as notifies and GPEs have
5311completed.
5312Within ACPICA, it is only called before a notify or GPE handler is
5313removed/uninstalled. It also may be useful for the host OS within related
5314drivers such as the Embedded Controller driver. See the ACPICA reference
5315for
5316additional information. ACPICA BZ 868.
5317
5318ACPI Tables: Added a new error message for a possible overflow failure
5319during
5320the conversion of FADT 32-bit legacy register addresses to internal
5321common
532264-
5323bit GAS structure representation. The GAS has a one-byte "bit length"
5324field,
5325thus limiting the register length to 255 bits. ACPICA BZ 953.
5326
5327Example Code and Data Size: These are the sizes for the OS-independent
5328acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5329debug
5330version of the code includes the debug output trace mechanism and has a
5331much
5332larger code and data size.
5333
5334  Previous Release:
5335    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
5336    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
5337  Current Release:
5338    Non-Debug Version:  93.0K Code, 25.1K Data, 118.1K Total
5339    Debug Version:     172.7K Code, 73.6K Data, 246.3K Total
5340
5341
53422) iASL Compiler/Disassembler and Tools:
5343
5344iASL: Added the ACPI 5.0 "PCC" keyword for use in the Register() ASL
5345macro.
5346This keyword was added late in the ACPI 5.0 release cycle and was not
5347implemented until now.
5348
5349Disassembler: Added support for Operation Region externals. Adds missing
5350support for operation regions that are defined in another table, and
5351referenced locally via a Field or BankField ASL operator. Now generates
5352the
5353correct External statement.
5354
5355Disassembler: Several additional fixes for the External() statement
5356generation
5357related to some ASL operators. Also, order the External() statements
5358alphabetically in the disassembler output. Fixes the External()
5359generation
5360for
5361the Create* field, Alias, and Scope operators:
5362 1) Create* buffer field operators - fix type mismatch warning on
5363disassembly
5364 2) Alias - implement missing External support
5365 3) Scope - fix to make sure all necessary externals are emitted.
5366
5367iASL: Improved pathname support. For include files, merge the prefix
5368pathname
5369with the file pathname and eliminate unnecessary components. Convert
5370backslashes in all pathnames to forward slashes, for readability. Include
5371file
5372pathname changes affect both #include and Include() type operators.
5373
5374iASL/DTC/Preprocessor: Gracefully handle early EOF. Handle an EOF at the
5375end
5376of a valid line by inserting a newline and then returning the EOF during
5377the
5378next call to GetNextLine. Prevents the line from being ignored due to EOF
5379condition.
5380
5381iASL: Implemented some changes to enhance the IDE support (-vi option.)
5382Error
5383and Warning messages are now correctly recognized for both the source
5384code
5385browser and the global error and warning counts.
5386
5387----------------------------------------
538820 April 2012. Summary of changes for version 20120420:
5389
5390
53911) ACPICA Core Subsystem:
5392
5393Implemented support for multiple notify handlers. This change adds
5394support
5395to
5396allow multiple system and device notify handlers on Device, Thermal Zone,
5397and
5398Processor objects. This can simplify the host OS notification
5399implementation.
5400Also re-worked and restructured the entire notify support code to
5401simplify
5402handler installation, handler removal, notify event queuing, and notify
5403dispatch to handler(s). Note: there can still only be two global notify
5404handlers - one for system notifies and one for device notifies. There are
5405no
5406changes to the existing handler install/remove interfaces. Lin Ming, Bob
5407Moore, Rafael Wysocki.
5408
5409Fixed a regression in the package repair code where the object reference
5410count was calculated incorrectly. Regression was introduced in the commit
5411"Support to add Package wrappers".
5412
5413Fixed a couple possible memory leaks in the AML parser, in the error
5414recovery
5415path. Jesper Juhl, Lin Ming.
5416
5417Example Code and Data Size: These are the sizes for the OS-independent
5418acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5419debug version of the code includes the debug output trace mechanism and
5420has a
5421much larger code and data size.
5422
5423  Previous Release:
5424    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
5425    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
5426  Current Release:
5427    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
5428    Debug Version:     172.6K Code, 73.4K Data, 246.0K Total
5429
5430
54312) iASL Compiler/Disassembler and Tools:
5432
5433iASL: Fixed a problem with the resource descriptor support where the
5434length
5435of the StartDependentFn and StartDependentFnNoPrio descriptors were not
5436included in cumulative descriptor offset, resulting in incorrect values
5437for
5438resource tags within resource descriptors appearing after a
5439StartDependent*
5440descriptor. Reported by Petr Vandrovec. ACPICA BZ 949.
5441
5442iASL and Preprocessor: Implemented full support for the #line directive
5443to
5444correctly track original source file line numbers through the .i
5445preprocessor
5446output file - for error and warning messages.
5447
5448iASL: Expand the allowable byte constants for address space IDs.
5449Previously,
5450the allowable range was 0x80-0xFF (user-defined spaces), now the range is
54510x0A-0xFF to allow for custom and new IDs without changing the compiler.
5452
5453iASL: Add option to treat all warnings as errors (-we). ACPICA BZ 948.
5454
5455iASL: Add option to completely disable the preprocessor (-Pn).
5456
5457iASL: Now emit all error/warning messages to standard error (stderr) by
5458default (instead of the previous stdout).
5459
5460ASL Test Suite (ASLTS): Reduce iASL warnings due to use of Switch().
5461Update
5462for resource descriptor offset fix above. Update/cleanup error output
5463routines. Enable and send iASL errors/warnings to an error logfile
5464(error.txt). Send all other iASL output to a logfile (compiler.txt).
5465Fixed
5466several extraneous "unrecognized operator" messages.
5467
5468----------------------------------------
546920 March 2012. Summary of changes for version 20120320:
5470
5471
54721) ACPICA Core Subsystem:
5473
5474Enhanced the sleep/wake interfaces to optionally execute the _GTS method
5475(Going To Sleep) and the _BFS method (Back From Sleep). Windows
5476apparently
5477does not execute these methods, and therefore these methods are often
5478untested. It has been seen on some systems where the execution of these
5479methods causes errors and also prevents the machine from entering S5. It
5480is
5481therefore suggested that host operating systems do not execute these
5482methods
5483by default. In the future, perhaps these methods can be optionally
5484executed
5485based on the age of the system and/or what is the newest version of
5486Windows
5487that the BIOS asks for via _OSI. Changed interfaces: AcpiEnterSleepState
5488and
5489AcpileaveSleepStatePrep. See the ACPICA reference and Linux BZ 13041. Lin
5490Ming.
5491
5492Fixed a problem where the length of the local/common FADT was set too
5493early.
5494The local FADT table length cannot be set to the common length until the
5495original length has been examined. There is code that checks the table
5496length
5497and sets various fields appropriately. This can affect older machines
5498with
5499early FADT versions. For example, this can cause inadvertent writes to
5500the
5501CST_CNT register. Julian Anastasov.
5502
5503Fixed a mapping issue related to a physical table override. Use the
5504deferred
5505mapping mechanism for tables loaded via the physical override OSL
5506interface.
5507This allows for early mapping before the virtual memory manager is
5508available.
5509Thomas Renninger, Bob Moore.
5510
5511Enhanced the automatic return-object repair code: Repair a common problem
5512with
5513predefined methods that are defined to return a variable-length Package
5514of
5515sub-objects. If there is only one sub-object, some BIOS ASL code
5516mistakenly
5517simply returns the single object instead of a Package with one sub-
5518object.
5519This new support will repair this error by wrapping a Package object
5520around
5521the original object, creating the correct and expected Package with one
5522sub-
5523object. Names that can be repaired in this manner include: _ALR, _CSD,
5524_HPX,
5525_MLS, _PLD, _PRT, _PSS, _TRT, _TSS, _BCL, _DOD, _FIX, and _Sx. ACPICA BZ
5526939.
5527
5528Changed the exception code returned for invalid ACPI paths passed as
5529parameters to external interfaces such as AcpiEvaluateObject. Was
5530AE_BAD_PARAMETER, now is the more sensible AE_BAD_PATHNAME.
5531
5532Example Code and Data Size: These are the sizes for the OS-independent
5533acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5534debug
5535version of the code includes the debug output trace mechanism and has a
5536much
5537larger code and data size.
5538
5539  Previous Release:
5540    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
5541    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
5542  Current Release:
5543    Non-Debug Version:  92.9K Code, 25.0K Data, 117.9K Total
5544    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
5545
5546
55472) iASL Compiler/Disassembler and Tools:
5548
5549iASL: Added the infrastructure and initial implementation of a integrated
5550C-
5551like preprocessor. This will simplify BIOS development process by
5552eliminating
5553the need for a separate preprocessing step during builds. On Windows, it
5554also
5555eliminates the need to install a separate C compiler. ACPICA BZ 761. Some
5556features including full #define() macro support are still under
5557development.
5558These preprocessor directives are supported:
5559    #define
5560    #elif
5561    #else
5562    #endif
5563    #error
5564    #if
5565    #ifdef
5566    #ifndef
5567    #include
5568    #pragma message
5569    #undef
5570    #warning
5571In addition, these new command line options are supported:
5572    -D <symbol> Define symbol for preprocessor use
5573    -li         Create preprocessed output file (*.i)
5574    -P          Preprocess only and create preprocessor output file (*.i)
5575
5576Table Compiler: Fixed a problem where the equals operator within an
5577expression
5578did not work properly.
5579
5580Updated iASL to use the current versions of Bison/Flex. Updated the
5581Windows
5582project file to invoke these tools from the standard location. ACPICA BZ
5583904.
5584Versions supported:
5585    Flex for Windows:  V2.5.4
5586    Bison for Windows: V2.4.1
5587
5588----------------------------------------
558915 February 2012. Summary of changes for version 20120215:
5590
5591
55921) ACPICA Core Subsystem:
5593
5594There have been some major changes to the sleep/wake support code, as
5595described below (a - e).
5596
5597a) The AcpiLeaveSleepState has been split into two interfaces, similar to
5598AcpiEnterSleepStatePrep and AcpiEnterSleepState. The new interface is
5599AcpiLeaveSleepStatePrep. This allows the host to perform actions between
5600the
5601time the _BFS method is called and the _WAK method is called. NOTE: all
5602hosts
5603must update their wake/resume code or else sleep/wake will not work
5604properly.
5605Rafael Wysocki.
5606
5607b) In AcpiLeaveSleepState, now enable all runtime GPEs before calling the
5608_WAK
5609method. Some machines require that the GPEs are enabled before the _WAK
5610method
5611is executed. Thomas Renninger.
5612
5613c) In AcpiLeaveSleepState, now always clear the WAK_STS (wake status)
5614bit.
5615Some BIOS code assumes that WAK_STS will be cleared on resume and use it
5616to
5617determine whether the system is rebooting or resuming. Matthew Garrett.
5618
5619d) Move the invocations of _GTS (Going To Sleep) and _BFS (Back From
5620Sleep) to
5621match the ACPI specification requirement. Rafael Wysocki.
5622
5623e) Implemented full support for the ACPI 5.0 SleepStatus and SleepControl
5624registers within the V5 FADT. This support adds two new files:
5625hardware/hwesleep.c implements the support for the new registers. Moved
5626all
5627sleep/wake external interfaces to hardware/hwxfsleep.c.
5628
5629
5630Added a new OSL interface for ACPI table overrides,
5631AcpiOsPhysicalTableOverride. This interface allows the host to override a
5632table via a physical address, instead of the logical address required by
5633AcpiOsTableOverride. This simplifies the host implementation. Initial
5634implementation by Thomas Renninger. The ACPICA implementation creates a
5635single
5636shared function for table overrides that attempts both a logical and a
5637physical override.
5638
5639Expanded the OSL memory read/write interfaces to 64-bit data
5640(AcpiOsReadMemory, AcpiOsWriteMemory.) This enables full 64-bit memory
5641transfer support for GAS register structures passed to AcpiRead and
5642AcpiWrite.
5643
5644Implemented the ACPI_REDUCED_HARDWARE option to allow the creation of a
5645custom
5646build of ACPICA that supports only the ACPI 5.0 reduced hardware (SoC)
5647model.
5648See the ACPICA reference for details. ACPICA BZ 942. This option removes
5649about
565010% of the code and 5% of the static data, and the following hardware
5651ACPI
5652features become unavailable:
5653    PM Event and Control registers
5654    SCI interrupt (and handler)
5655    Fixed Events
5656    General Purpose Events (GPEs)
5657    Global Lock
5658    ACPI PM timer
5659    FACS table (Waking vectors and Global Lock)
5660
5661Updated the unix tarball directory structure to match the ACPICA git
5662source
5663tree. This ensures that the generic unix makefiles work properly (in
5664generate/unix).  Also updated the Linux makefiles to match. ACPICA BZ
5665867.
5666
5667Updated the return value of the _REV predefined method to integer value 5
5668to
5669reflect ACPI 5.0 support.
5670
5671Moved the external ACPI PM timer interface prototypes to the public
5672acpixf.h
5673file where they belong.
5674
5675Example Code and Data Size: These are the sizes for the OS-independent
5676acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5677debug
5678version of the code includes the debug output trace mechanism and has a
5679much
5680larger code and data size.
5681
5682  Previous Release:
5683    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
5684    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
5685  Current Release:
5686    Non-Debug Version:  93.0K Code, 25.0K Data, 118.0K Total
5687    Debug Version:     172.5K Code, 73.2K Data, 245.7K Total
5688
5689
56902) iASL Compiler/Disassembler and Tools:
5691
5692Disassembler: Fixed a problem with the new ACPI 5.0 serial resource
5693descriptors (I2C, SPI, UART) where the resource produce/consumer bit was
5694incorrectly displayed.
5695
5696AcpiHelp: Add display of ACPI/PNP device IDs that are defined in the ACPI
5697specification.
5698
5699----------------------------------------
570011 January 2012. Summary of changes for version 20120111:
5701
5702
57031) ACPICA Core Subsystem:
5704
5705Implemented a new mechanism to allow host device drivers to check for
5706address
5707range conflicts with ACPI Operation Regions. Both SystemMemory and
5708SystemIO
5709address spaces are supported. A new external interface,
5710AcpiCheckAddressRange,
5711allows drivers to check an address range against the ACPI namespace. See
5712the
5713ACPICA reference for additional details. Adds one new file,
5714utilities/utaddress.c. Lin Ming, Bob Moore.
5715
5716Fixed several issues with the ACPI 5.0 FADT support: Add the sleep
5717Control
5718and
5719Status registers, update the ACPI 5.0 flags, and update internal data
5720structures to handle an FADT larger than 256 bytes. The size of the ACPI
57215.0
5722FADT is 268 bytes.
5723
5724Updated all ACPICA copyrights and signons to 2012. Added the 2012
5725copyright to
5726all module headers and signons, including the standard Linux header. This
5727affects virtually every file in the ACPICA core subsystem, iASL compiler,
5728and
5729all ACPICA utilities.
5730
5731Example Code and Data Size: These are the sizes for the OS-independent
5732acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
5733debug
5734version of the code includes the debug output trace mechanism and has a
5735much
5736larger code and data size.
5737
5738  Previous Release:
5739    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
5740    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
5741  Current Release:
5742    Non-Debug Version:  92.8K Code, 24.9K Data, 117.7K Total
5743    Debug Version:     171.7K Code, 72.9K Data, 244.5K Total
5744
5745
57462) iASL Compiler/Disassembler and Tools:
5747
5748Disassembler: fixed a problem with the automatic resource tag generation
5749support. Fixes a problem where the resource tags are inadvertently not
5750constructed if the table being disassembled contains external references
5751to
5752control methods. Moved the actual construction of the tags to after the
5753final
5754namespace is constructed (after 2nd parse is invoked due to external
5755control
5756method references.) ACPICA BZ 941.
5757
5758Table Compiler: Make all "generic" operators caseless. These are the
5759operators
5760like UINT8, String, etc. Making these caseless improves ease-of-use.
5761ACPICA BZ
5762934.
5763
5764----------------------------------------
576523 November 2011. Summary of changes for version 20111123:
5766
57670) ACPI 5.0 Support:
5768
5769This release contains full support for the ACPI 5.0 specification, as
5770summarized below.
5771
5772Reduced Hardware Support:
5773-------------------------
5774
5775This support allows for ACPI systems without the usual ACPI hardware.
5776This
5777support is enabled by a flag in the revision 5 FADT. If it is set, ACPICA
5778will
5779not attempt to initialize or use any of the usual ACPI hardware. Note,
5780when
5781this flag is set, all of the following ACPI hardware is assumed to be not
5782present and is not initialized or accessed:
5783
5784    General Purpose Events (GPEs)
5785    Fixed Events (PM1a/PM1b and PM Control)
5786    Power Management Timer and Console Buttons (power/sleep)
5787    Real-time Clock Alarm
5788    Global Lock
5789    System Control Interrupt (SCI)
5790    The FACS is assumed to be non-existent
5791
5792ACPI Tables:
5793------------
5794
5795All new tables and updates to existing tables are fully supported in the
5796ACPICA headers (for use by device drivers), the disassembler, and the
5797iASL
5798Data Table Compiler. ACPI 5.0 defines these new tables:
5799
5800    BGRT        /* Boot Graphics Resource Table */
5801    DRTM        /* Dynamic Root of Trust for Measurement table */
5802    FPDT        /* Firmware Performance Data Table */
5803    GTDT        /* Generic Timer Description Table */
5804    MPST        /* Memory Power State Table */
5805    PCCT        /* Platform Communications Channel Table */
5806    PMTT        /* Platform Memory Topology Table */
5807    RASF        /* RAS Feature table */
5808
5809Operation Regions/SpaceIDs:
5810---------------------------
5811
5812All new operation regions are fully supported by the iASL compiler, the
5813disassembler, and the ACPICA runtime code (for dispatch to region
5814handlers.)
5815The new operation region Space IDs are:
5816
5817    GeneralPurposeIo
5818    GenericSerialBus
5819
5820Resource Descriptors:
5821---------------------
5822
5823All new ASL resource descriptors are fully supported by the iASL
5824compiler,
5825the
5826ASL/AML disassembler, and the ACPICA runtime Resource Manager code
5827(including
5828all new predefined resource tags). New descriptors are:
5829
5830    FixedDma
5831    GpioIo
5832    GpioInt
5833    I2cSerialBus
5834    SpiSerialBus
5835    UartSerialBus
5836
5837ASL/AML Operators, New and Modified:
5838------------------------------------
5839
5840One new operator is added, the Connection operator, which is used to
5841associate
5842a GeneralPurposeIo or GenericSerialBus resource descriptor with
5843individual
5844field objects within an operation region. Several new protocols are
5845associated
5846with the AccessAs operator. All are fully supported by the iASL compiler,
5847disassembler, and runtime ACPICA AML interpreter:
5848
5849    Connection                      // Declare Field Connection
5850attributes
5851    AccessAs: AttribBytes (n)           // Read/Write N-Bytes Protocol
5852    AccessAs: AttribRawBytes (n)        // Raw Read/Write N-Bytes
5853Protocol
5854    AccessAs: AttribRawProcessBytes (n) // Raw Process Call Protocol
5855    RawDataBuffer                       // Data type for Vendor Data
5856fields
5857
5858Predefined ASL/AML Objects:
5859---------------------------
5860
5861All new predefined objects/control-methods are supported by the iASL
5862compiler
5863and the ACPICA runtime validation/repair (arguments and return values.)
5864New
5865predefined names include the following:
5866
5867Standard Predefined Names (Objects or Control Methods):
5868    _AEI, _CLS, _CPC, _CWS, _DEP,
5869    _DLM, _EVT, _GCP, _CRT, _GWS,
5870    _HRV, _PRE, _PSE, _SRT, _SUB.
5871
5872Resource Tags (Names used to access individual fields within resource
5873descriptors):
5874    _DBT, _DPL, _DRS, _END, _FLC,
5875    _IOR, _LIN, _MOD, _PAR, _PHA,
5876    _PIN, _PPI, _POL, _RXL, _SLV,
5877    _SPE, _STB, _TXL, _VEN.
5878
5879ACPICA External Interfaces:
5880---------------------------
5881
5882Several new interfaces have been defined for use by ACPI-related device
5883drivers and other host OS services:
5884
5885AcpiAcquireMutex and AcpiReleaseMutex: These interfaces allow the host OS
5886to
5887acquire and release AML mutexes that are defined in the DSDT/SSDT tables
5888provided by the BIOS. They are intended to be used in conjunction with
5889the
5890ACPI 5.0 _DLM (Device Lock Method) in order to provide transaction-level
5891mutual exclusion with the AML code/interpreter.
5892
5893AcpiGetEventResources: Returns the (formatted) resource descriptors as
5894defined
5895by the ACPI 5.0 _AEI object (ACPI Event Information).  This object
5896provides
5897resource descriptors associated with hardware-reduced platform events,
5898similar
5899to the AcpiGetCurrentResources interface.
5900
5901Operation Region Handlers: For General Purpose IO and Generic Serial Bus
5902operation regions, information about the Connection() object and any
5903optional
5904length information is passed to the region handler within the Context
5905parameter.
5906
5907AcpiBufferToResource: This interface converts a raw AML buffer containing
5908a
5909resource template or resource descriptor to the ACPI_RESOURCE internal
5910format
5911suitable for use by device drivers. Can be used by an operation region
5912handler
5913to convert the Connection() buffer object into a ACPI_RESOURCE.
5914
5915Miscellaneous/Tools/TestSuites:
5916-------------------------------
5917
5918Support for extended _HID names (Four alpha characters instead of three).
5919Support for ACPI 5.0 features in the AcpiExec and AcpiHelp utilities.
5920Support for ACPI 5.0 features in the ASLTS test suite.
5921Fully updated documentation (ACPICA and iASL reference documents.)
5922
5923ACPI Table Definition Language:
5924-------------------------------
5925
5926Support for this language was implemented and released as a subsystem of
5927the
5928iASL compiler in 2010. (See the iASL compiler User Guide.)
5929
5930
5931Non-ACPI 5.0 changes for this release:
5932--------------------------------------
5933
59341) ACPICA Core Subsystem:
5935
5936Fix a problem with operation region declarations where a failure can
5937occur
5938if
5939the region name and an argument that evaluates to an object (such as the
5940region address) are in different namespace scopes. Lin Ming, ACPICA BZ
5941937.
5942
5943Do not abort an ACPI table load if an invalid space ID is found within.
5944This
5945will be caught later if the offending method is executed. ACPICA BZ 925.
5946
5947Fixed an issue with the FFixedHW space ID where the ID was not always
5948recognized properly (Both ACPICA and iASL). ACPICA BZ 926.
5949
5950Fixed a problem with the 32-bit generation of the unix-specific OSL
5951(osunixxf.c). Lin Ming, ACPICA BZ 936.
5952
5953Several changes made to enable generation with the GCC 4.6 compiler.
5954ACPICA BZ
5955935.
5956
5957New error messages: Unsupported I/O requests (not 8/16/32 bit), and
5958Index/Bank
5959field registers out-of-range.
5960
59612) iASL Compiler/Disassembler and Tools:
5962
5963iASL: Implemented the __PATH__ operator, which returns the full pathname
5964of
5965the current source file.
5966
5967AcpiHelp: Automatically display expanded keyword information for all ASL
5968operators.
5969
5970Debugger: Add "Template" command to disassemble/dump resource template
5971buffers.
5972
5973Added a new master script to generate and execute the ASLTS test suite.
5974Automatically handles 32- and 64-bit generation. See tests/aslts.sh
5975
5976iASL: Fix problem with listing generation during processing of the
5977Switch()
5978operator where AML listing was disabled until the entire Switch block was
5979completed.
5980
5981iASL: Improve support for semicolon statement terminators. Fix "invalid
5982character" message for some cases when the semicolon is used. Semicolons
5983are
5984now allowed after every <Term> grammar element. ACPICA BZ 927.
5985
5986iASL: Fixed some possible aliasing warnings during generation. ACPICA BZ
5987923.
5988
5989Disassembler: Fix problem with disassembly of the DataTableRegion
5990operator
5991where an inadvertent "Unhandled deferred opcode" message could be
5992generated.
5993
59943) Example Code and Data Size
5995
5996These are the sizes for the OS-independent acpica.lib produced by the
5997Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
5998includes the debug output trace mechanism and has a much larger code and
5999data
6000size.
6001
6002  Previous Release:
6003    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
6004    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6005  Current Release:
6006    Non-Debug Version:  92.3K Code, 24.9K Data, 117.2K Total
6007    Debug Version:     170.8K Code, 72.6K Data, 243.4K Total
6008
6009----------------------------------------
601022 September 2011. Summary of changes for version 20110922:
6011
60120) ACPI 5.0 News:
6013
6014Support for ACPI 5.0 in ACPICA has been underway for several months and
6015will
6016be released at the same time that ACPI 5.0 is officially released.
6017
6018The ACPI 5.0 specification is on track for release in the next few
6019months.
6020
60211) ACPICA Core Subsystem:
6022
6023Fixed a problem where the maximum sleep time for the Sleep() operator was
6024intended to be limited to two seconds, but was inadvertently limited to
602520
6026seconds instead.
6027
6028Linux and Unix makefiles: Added header file dependencies to ensure
6029correct
6030generation of ACPICA core code and utilities. Also simplified the
6031makefiles
6032considerably through the use of the vpath variable to specify search
6033paths.
6034ACPICA BZ 924.
6035
60362) iASL Compiler/Disassembler and Tools:
6037
6038iASL: Implemented support to check the access length for all fields
6039created to
6040access named Resource Descriptor fields. For example, if a resource field
6041is
6042defined to be two bits, a warning is issued if a CreateXxxxField() is
6043used
6044with an incorrect bit length. This is implemented for all current
6045resource
6046descriptor names. ACPICA BZ 930.
6047
6048Disassembler: Fixed a byte ordering problem with the output of 24-bit and
604956-
6050bit integers.
6051
6052iASL: Fixed a couple of issues associated with variable-length package
6053objects. 1) properly handle constants like One, Ones, Zero -- do not make
6054a
6055VAR_PACKAGE when these are used as a package length. 2) Allow the
6056VAR_PACKAGE
6057opcode (in addition to PACKAGE) when validating object types for
6058predefined
6059names.
6060
6061iASL: Emit statistics for all output files (instead of just the ASL input
6062and
6063AML output). Includes listings, hex files, etc.
6064
6065iASL: Added -G option to the table compiler to allow the compilation of
6066custom
6067ACPI tables. The only part of a table that is required is the standard
606836-
6069byte
6070ACPI header.
6071
6072AcpiXtract: Ported to the standard ACPICA environment (with ACPICA
6073headers),
6074which also adds correct 64-bit support. Also, now all output filenames
6075are
6076completely lower case.
6077
6078AcpiExec: Ignore any non-AML tables (tables other than DSDT or SSDT) when
6079loading table files. A warning is issued for any such tables. The only
6080exception is an FADT. This also fixes a possible fault when attempting to
6081load
6082non-AML tables. ACPICA BZ 932.
6083
6084AcpiHelp: Added the AccessAs and Offset operators. Fixed a problem where
6085a
6086missing table terminator could cause a fault when using the -p option.
6087
6088AcpiSrc: Fixed a possible divide-by-zero fault when generating file
6089statistics.
6090
60913) Example Code and Data Size
6092
6093These are the sizes for the OS-independent acpica.lib produced by the
6094Microsoft Visual C++ 9.0 32-bit compiler. The debug version of the code
6095includes the debug output trace mechanism and has a much larger code and
6096data
6097size.
6098
6099  Previous Release (VC 9.0):
6100    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
6101    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6102  Current Release (VC 9.0):
6103    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
6104    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6105
6106
6107----------------------------------------
610823 June 2011. Summary of changes for version 20110623:
6109
61101) ACPI CA Core Subsystem:
6111
6112Updated the predefined name repair mechanism to not attempt repair of a
6113_TSS
6114return object if a _PSS object is present. We can only sort the _TSS
6115return
6116package if there is no _PSS within the same scope. This is because if
6117_PSS
6118is
6119present, the ACPI specification dictates that the _TSS Power Dissipation
6120field
6121is to be ignored, and therefore some BIOSs leave garbage values in the
6122_TSS
6123Power field(s). In this case, it is best to just return the _TSS package
6124as-
6125is. Reported by, and fixed with assistance from Fenghua Yu.
6126
6127Added an option to globally disable the control method return value
6128validation
6129and repair. This runtime option can be used to disable return value
6130repair
6131if
6132this is causing a problem on a particular machine. Also added an option
6133to
6134AcpiExec (-dr) to set this disable flag.
6135
6136All makefiles and project files: Major changes to improve generation of
6137ACPICA
6138tools. ACPICA BZ 912:
6139    Reduce default optimization levels to improve compatibility
6140    For Linux, add strict-aliasing=0 for gcc 4
6141    Cleanup and simplify use of command line defines
6142    Cleanup multithread library support
6143    Improve usage messages
6144
6145Linux-specific header: update handling of THREAD_ID and pthread. For the
614632-
6147bit case, improve casting to eliminate possible warnings, especially with
6148the
6149acpica tools.
6150
6151Example Code and Data Size: These are the sizes for the OS-independent
6152acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6153debug
6154version of the code includes the debug output trace mechanism and has a
6155much
6156larger code and data size.
6157
6158  Previous Release (VC 9.0):
6159    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
6160    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6161  Current Release (VC 9.0):
6162    Non-Debug Version:  90.2K Code, 23.9K Data, 114.1K Total
6163    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6164
61652) iASL Compiler/Disassembler and Tools:
6166
6167With this release, a new utility named "acpihelp" has been added to the
6168ACPICA
6169package. This utility summarizes the ACPI specification chapters for the
6170ASL
6171and AML languages. It generates under Linux/Unix as well as Windows, and
6172provides the following functionality:
6173    Find/display ASL operator(s) -- with description and syntax.
6174    Find/display ASL keyword(s) -- with exact spelling and descriptions.
6175    Find/display ACPI predefined name(s) -- with description, number
6176        of arguments, and the return value data type.
6177    Find/display AML opcode name(s) -- with opcode, arguments, and
6178grammar.
6179    Decode/display AML opcode -- with opcode name, arguments, and
6180grammar.
6181
6182Service Layers: Make multi-thread support configurable. Conditionally
6183compile
6184the multi-thread support so that threading libraries will not be linked
6185if
6186not
6187necessary. The only tool that requires multi-thread support is AcpiExec.
6188
6189iASL: Update yyerrror/AslCompilerError for "const" errors. Newer versions
6190of
6191Bison appear to want the interface to yyerror to be a const char * (or at
6192least this is a problem when generating iASL on some systems.) ACPICA BZ
6193923
6194Pierre Lejeune.
6195
6196Tools: Fix for systems where O_BINARY is not defined. Only used for
6197Windows
6198versions of the tools.
6199
6200----------------------------------------
620127 May 2011. Summary of changes for version 20110527:
6202
62031) ACPI CA Core Subsystem:
6204
6205ASL Load() operator: Reinstate most restrictions on the incoming ACPI
6206table
6207signature. Now, only allow SSDT, OEMx, and a null signature. History:
6208    1) Originally, we checked the table signature for "SSDT" or "PSDT".
6209       (PSDT is now obsolete.)
6210    2) We added support for OEMx tables, signature "OEM" plus a fourth
6211       "don't care" character.
6212    3) Valid tables were encountered with a null signature, so we just
6213       gave up on validating the signature, (05/2008).
6214    4) We encountered non-AML tables such as the MADT, which caused
6215       interpreter errors and kernel faults. So now, we once again allow
6216       only SSDT, OEMx, and now, also a null signature. (05/2011).
6217
6218Added the missing _TDL predefined name to the global name list in order
6219to
6220enable validation. Affects both the core ACPICA code and the iASL
6221compiler.
6222
6223Example Code and Data Size: These are the sizes for the OS-independent
6224acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6225debug
6226version of the code includes the debug output trace mechanism and has a
6227much
6228larger code and data size.
6229
6230  Previous Release (VC 9.0):
6231    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
6232    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
6233  Current Release (VC 9.0):
6234    Non-Debug Version:  90.1K Code, 23.9K Data, 114.0K Total
6235    Debug Version:     165.6K Code, 68.4K Data, 234.0K Total
6236
62372) iASL Compiler/Disassembler and Tools:
6238
6239Debugger/AcpiExec: Implemented support for "complex" method arguments on
6240the
6241debugger command line. This adds support beyond simple integers --
6242including
6243Strings, Buffers, and Packages. Includes support for nested packages.
6244Increased the default command line buffer size to accommodate these
6245arguments.
6246See the ACPICA reference for details and syntax. ACPICA BZ 917.
6247
6248Debugger/AcpiExec: Implemented support for "default" method arguments for
6249the
6250Execute/Debug command. Now, the debugger will always invoke a control
6251method
6252with the required number of arguments -- even if the command line
6253specifies
6254none or insufficient arguments. It uses default integer values for any
6255missing
6256arguments. Also fixes a bug where only six method arguments maximum were
6257supported instead of the required seven.
6258
6259Debugger/AcpiExec: Add a maximum buffer length parameter to AcpiOsGetLine
6260and
6261also return status in order to prevent buffer overruns. See the ACPICA
6262reference for details and syntax. ACPICA BZ 921
6263
6264iASL: Cleaned up support for Berkeley yacc. A general cleanup of code and
6265makefiles to simplify support for the two different but similar parser
6266generators, bison and yacc.
6267
6268Updated the generic unix makefile for gcc 4. The default gcc version is
6269now
6270expected to be 4 or greater, since options specific to gcc 4 are used.
6271
6272----------------------------------------
627313 April 2011. Summary of changes for version 20110413:
6274
62751) ACPI CA Core Subsystem:
6276
6277Implemented support to execute a so-called "orphan" _REG method under the
6278EC
6279device. This change will force the execution of a _REG method underneath
6280the
6281EC
6282device even if there is no corresponding operation region of type
6283EmbeddedControl. Fixes a problem seen on some machines and apparently is
6284compatible with Windows behavior. ACPICA BZ 875.
6285
6286Added more predefined methods that are eligible for automatic NULL
6287package
6288element removal. This change adds another group of predefined names to
6289the
6290list
6291of names that can be repaired by having NULL package elements dynamically
6292removed. This group are those methods that return a single variable-
6293length
6294package containing simple data types such as integers, buffers, strings.
6295This
6296includes: _ALx, _BCL, _CID,_ DOD, _EDL, _FIX, _PCL, _PLD, _PMD, _PRx,
6297_PSL,
6298_Sx,
6299and _TZD. ACPICA BZ 914.
6300
6301Split and segregated all internal global lock functions to a new file,
6302evglock.c.
6303
6304Updated internal address SpaceID for DataTable regions. Moved this
6305internal
6306space
6307id in preparation for ACPI 5.0 changes that will include some new space
6308IDs.
6309This
6310change should not affect user/host code.
6311
6312Example Code and Data Size: These are the sizes for the OS-independent
6313acpica.lib
6314produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6315version of
6316the code includes the debug output trace mechanism and has a much larger
6317code
6318and
6319data size.
6320
6321  Previous Release (VC 9.0):
6322    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
6323    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
6324  Current Release (VC 9.0):
6325    Non-Debug Version:  90.0K Code, 23.8K Data, 113.8K Total
6326    Debug Version:     164.5K Code, 68.0K Data, 232.5K Total
6327
63282) iASL Compiler/Disassembler and Tools:
6329
6330iASL/DTC: Major update for new grammar features. Allow generic data types
6331in
6332custom ACPI tables. Field names are now optional. Any line can be split
6333to
6334multiple lines using the continuation char (\). Large buffers now use
6335line-
6336continuation character(s) and no colon on the continuation lines. See the
6337grammar
6338update in the iASL compiler reference. ACPI BZ 910,911. Lin Ming, Bob
6339Moore.
6340
6341iASL: Mark ASL "Return()" and the simple "Return" as "Null" return
6342statements.
6343Since the parser stuffs a "zero" as the return value for these statements
6344(due
6345to
6346the underlying AML grammar), they were seen as "return with value" by the
6347iASL
6348semantic checking. They are now seen correctly as "null" return
6349statements.
6350
6351iASL: Check if a_REG declaration has a corresponding Operation Region.
6352Adds a
6353check for each _REG to ensure that there is in fact a corresponding
6354operation
6355region declaration in the same scope. If not, the _REG method is not very
6356useful
6357since it probably won't be executed. ACPICA BZ 915.
6358
6359iASL/DTC: Finish support for expression evaluation. Added a new
6360expression
6361parser
6362that implements c-style operator precedence and parenthesization. ACPICA
6363bugzilla
6364908.
6365
6366Disassembler/DTC: Remove support for () and <> style comments in data
6367tables.
6368Now
6369that DTC has full expression support, we don't want to have comment
6370strings
6371that
6372start with a parentheses or a less-than symbol. Now, only the standard /*
6373and
6374//
6375comments are supported, as well as the bracket [] comments.
6376
6377AcpiXtract: Fix for RSDP and dynamic SSDT extraction. These tables have
6378"unusual"
6379headers in the acpidump file. Update the header validation to support
6380these
6381tables. Problem introduced in previous AcpiXtract version in the change
6382to
6383support "wrong checksum" error messages emitted by acpidump utility.
6384
6385iASL: Add a * option to generate all template files (as a synonym for
6386ALL)
6387as
6388in
6389"iasl -T *" or "iasl -T ALL".
6390
6391iASL/DTC: Do not abort compiler on fatal errors. We do not want to
6392completely
6393abort the compiler on "fatal" errors, simply should abort the current
6394compile.
6395This allows multiple compiles with a single (possibly wildcard) compiler
6396invocation.
6397
6398----------------------------------------
639916 March 2011. Summary of changes for version 20110316:
6400
64011) ACPI CA Core Subsystem:
6402
6403Fixed a problem caused by a _PRW method appearing at the namespace root
6404scope
6405during the setup of wake GPEs. A fault could occur if a _PRW directly
6406under
6407the
6408root object was passed to the AcpiSetupGpeForWake interface. Lin Ming.
6409
6410Implemented support for "spurious" Global Lock interrupts. On some
6411systems, a
6412global lock interrupt can occur without the pending flag being set. Upon
6413a
6414GL
6415interrupt, we now ensure that a thread is actually waiting for the lock
6416before
6417signaling GL availability. Rafael Wysocki, Bob Moore.
6418
6419Example Code and Data Size: These are the sizes for the OS-independent
6420acpica.lib
6421produced by the Microsoft Visual C++ 9.0 32-bit compiler. The debug
6422version of
6423the code includes the debug output trace mechanism and has a much larger
6424code
6425and
6426data size.
6427
6428  Previous Release (VC 9.0):
6429    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
6430    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
6431  Current Release (VC 9.0):
6432    Non-Debug Version:  89.8K Code, 23.8K Data, 113.6K Total
6433    Debug Version:     164.2K Code, 67.9K Data, 232.1K Total
6434
64352) iASL Compiler/Disassembler and Tools:
6436
6437Implemented full support for the "SLIC" ACPI table. Includes support in
6438the
6439header files, disassembler, table compiler, and template generator. Bob
6440Moore,
6441Lin Ming.
6442
6443AcpiXtract: Correctly handle embedded comments and messages from
6444AcpiDump.
6445Apparently some or all versions of acpidump will occasionally emit a
6446comment
6447like
6448"Wrong checksum", etc., into the dump file. This was causing problems for
6449AcpiXtract. ACPICA BZ 905.
6450
6451iASL: Fix the Linux makefile by removing an inadvertent double file
6452inclusion.
6453ACPICA BZ 913.
6454
6455AcpiExec: Update installation of operation region handlers. Install one
6456handler
6457for a user-defined address space. This is used by the ASL test suite
6458(ASLTS).
6459
6460----------------------------------------
646111 February 2011. Summary of changes for version 20110211:
6462
64631) ACPI CA Core Subsystem:
6464
6465Added a mechanism to defer _REG methods for some early-installed
6466handlers.
6467Most user handlers should be installed before call to
6468AcpiEnableSubsystem.
6469However, Event handlers and region handlers should be installed after
6470AcpiInitializeObjects. Override handlers for the "default" regions should
6471be
6472installed early, however. This change executes all _REG methods for the
6473default regions (Memory/IO/PCI/DataTable) simultaneously to prevent any
6474chicken/egg issues between them. ACPICA BZ 848.
6475
6476Implemented an optimization for GPE detection. This optimization will
6477simply
6478ignore GPE registers that contain no enabled GPEs -- there is no need to
6479read the register since this information is available internally. This
6480becomes more important on machines with a large GPE space. ACPICA
6481bugzilla
6482884. Lin Ming. Suggestion from Joe Liu.
6483
6484Removed all use of the highly unreliable FADT revision field. The
6485revision
6486number in the FADT has been found to be completely unreliable and cannot
6487be
6488trusted. Only the actual table length can be used to infer the version.
6489This
6490change updates the ACPICA core and the disassembler so that both no
6491longer
6492even look at the FADT version and instead depend solely upon the FADT
6493length.
6494
6495Fix an unresolved name issue for the no-debug and no-error-message source
6496generation cases. The _AcpiModuleName was left undefined in these cases,
6497but
6498it is actually needed as a parameter to some interfaces. Define
6499_AcpiModuleName as a null string in these cases. ACPICA Bugzilla 888.
6500
6501Split several large files (makefiles and project files updated)
6502  utglobal.c   -> utdecode.c
6503  dbcomds.c    -> dbmethod.c dbnames.c
6504  dsopcode.c   -> dsargs.c dscontrol.c
6505  dsload.c     -> dsload2.c
6506  aslanalyze.c -> aslbtypes.c aslwalks.c
6507
6508Example Code and Data Size: These are the sizes for the OS-independent
6509acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6510debug version of the code includes the debug output trace mechanism and
6511has
6512a much larger code and data size.
6513
6514  Previous Release (VC 9.0):
6515    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
6516    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
6517  Current Release (VC 9.0):
6518    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
6519    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
6520
65212) iASL Compiler/Disassembler and Tools:
6522
6523iASL: Implemented the predefined macros __LINE__, __FILE__, and __DATE__.
6524These are useful C-style macros with the standard definitions. ACPICA
6525bugzilla 898.
6526
6527iASL/DTC: Added support for integer expressions and labels. Support for
6528full
6529expressions for all integer fields in all ACPI tables. Support for labels
6530in
6531"generic" portions of tables such as UEFI. See the iASL reference manual.
6532
6533Debugger: Added a command to display the status of global handlers. The
6534"handlers" command will display op region, fixed event, and miscellaneous
6535global handlers. installation status -- and for op regions, whether
6536default
6537or user-installed handler will be used.
6538
6539iASL: Warn if reserved method incorrectly returns a value. Many
6540predefined
6541names are defined such that they do not return a value. If implemented as
6542a
6543method, issue a warning if such a name explicitly returns a value. ACPICA
6544Bugzilla 855.
6545
6546iASL: Added detection of GPE method name conflicts. Detects a conflict
6547where
6548there are two GPE methods of the form _Lxy and _Exy in the same scope.
6549(For
6550example, _L1D and _E1D in the same scope.) ACPICA bugzilla 848.
6551
6552iASL/DTC: Fixed a couple input scanner issues with comments and line
6553numbers. Comment remover could get confused and miss a comment ending.
6554Fixed
6555a problem with line counter maintenance.
6556
6557iASL/DTC: Reduced the severity of some errors from fatal to error. There
6558is
6559no need to abort on simple errors within a field definition.
6560
6561Debugger: Simplified the output of the help command. All help output now
6562in
6563a single screen, instead of help subcommands. ACPICA Bugzilla 897.
6564
6565----------------------------------------
656612 January 2011. Summary of changes for version 20110112:
6567
65681) ACPI CA Core Subsystem:
6569
6570Fixed a race condition between method execution and namespace walks that
6571can
6572possibly cause a fault. The problem was apparently introduced in version
657320100528 as a result of a performance optimization that reduces the
6574number
6575of
6576namespace walks upon method exit by using the delete_namespace_subtree
6577function instead of the delete_namespace_by_owner function used
6578previously.
6579Bug is a missing namespace lock in the delete_namespace_subtree function.
6580dana.myers@oracle.com
6581
6582Fixed several issues and a possible fault with the automatic "serialized"
6583method support. History: This support changes a method to "serialized" on
6584the
6585fly if the method generates an AE_ALREADY_EXISTS error, indicating the
6586possibility that it cannot handle reentrancy. This fix repairs a couple
6587of
6588issues seen in the field, especially on machines with many cores:
6589
6590    1) Delete method children only upon the exit of the last thread,
6591       so as to not delete objects out from under other running threads
6592      (and possibly causing a fault.)
6593    2) Set the "serialized" bit for the method only upon the exit of the
6594       Last thread, so as to not cause deadlock when running threads
6595       attempt to exit.
6596    3) Cleanup the use of the AML "MethodFlags" and internal method flags
6597       so that there is no longer any confusion between the two.
6598
6599    Lin Ming, Bob Moore. Reported by dana.myers@oracle.com.
6600
6601Debugger: Now lock the namespace for duration of a namespace dump.
6602Prevents
6603issues if the namespace is changing dynamically underneath the debugger.
6604Especially affects temporary namespace nodes, since the debugger displays
6605these also.
6606
6607Updated the ordering of include files. The ACPICA headers should appear
6608before any compiler-specific headers (stdio.h, etc.) so that acenv.h can
6609set
6610any necessary compiler-specific defines, etc. Affects the ACPI-related
6611tools
6612and utilities.
6613
6614Updated all ACPICA copyrights and signons to 2011. Added the 2011
6615copyright
6616to all module headers and signons, including the Linux header. This
6617affects
6618virtually every file in the ACPICA core subsystem, iASL compiler, and all
6619utilities.
6620
6621Added project files for MS Visual Studio 2008 (VC++ 9.0). The original
6622project files for VC++ 6.0 are now obsolete. New project files can be
6623found
6624under acpica/generate/msvc9. See acpica/generate/msvc9/readme.txt for
6625details.
6626
6627Example Code and Data Size: These are the sizes for the OS-independent
6628acpica.lib produced by the Microsoft Visual C++ 9.0 32-bit compiler. The
6629debug version of the code includes the debug output trace mechanism and
6630has a
6631much larger code and data size.
6632
6633  Previous Release (VC 6.0):
6634    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
6635    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
6636  Current Release (VC 9.0):
6637    Non-Debug Version:  89.7K Code, 23.7K Data, 113.4K Total
6638    Debug Version:     163.9K Code, 67.5K Data, 231.4K Total
6639
66402) iASL Compiler/Disassembler and Tools:
6641
6642iASL: Added generic data types to the Data Table compiler. Add "generic"
6643data
6644types such as UINT32, String, Unicode, etc., to simplify the generation
6645of
6646platform-defined tables such as UEFI. Lin Ming.
6647
6648iASL: Added listing support for the Data Table Compiler. Adds listing
6649support
6650(-l) to display actual binary output for each line of input code.
6651
6652----------------------------------------
665309 December 2010. Summary of changes for version 20101209:
6654
66551) ACPI CA Core Subsystem:
6656
6657Completed the major overhaul of the GPE support code that was begun in
6658July
66592010. Major features include: removal of _PRW execution in ACPICA (host
6660executes _PRWs anyway), cleanup of "wake" GPE interfaces and processing,
6661changes to existing interfaces, simplification of GPE handler operation,
6662and
6663a handful of new interfaces:
6664
6665    AcpiUpdateAllGpes
6666    AcpiFinishGpe
6667    AcpiSetupGpeForWake
6668    AcpiSetGpeWakeMask
6669    One new file, evxfgpe.c to consolidate all external GPE interfaces.
6670
6671See the ACPICA Programmer Reference for full details and programming
6672information. See the new section 4.4 "General Purpose Event (GPE)
6673Support"
6674for a full overview, and section 8.7 "ACPI General Purpose Event
6675Management"
6676for programming details. ACPICA BZ 858,870,877. Matthew Garrett, Lin
6677Ming,
6678Bob Moore, Rafael Wysocki.
6679
6680Implemented a new GPE feature for Windows compatibility, the "Implicit
6681Wake
6682GPE Notify". This feature will automatically issue a Notify(2) on a
6683device
6684when a Wake GPE is received if there is no corresponding GPE method or
6685handler. ACPICA BZ 870.
6686
6687Fixed a problem with the Scope() operator during table parse and load
6688phase.
6689During load phase (table load or method execution), the scope operator
6690should
6691not enter the target into the namespace. Instead, it should open a new
6692scope
6693at the target location. Linux BZ 19462, ACPICA BZ 882.
6694
6695Example Code and Data Size: These are the sizes for the OS-independent
6696acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6697debug version of the code includes the debug output trace mechanism and
6698has a
6699much larger code and data size.
6700
6701  Previous Release:
6702    Non-Debug Version:  89.8K Code, 18.9K Data, 108.7K Total
6703    Debug Version:     166.6K Code, 52.1K Data, 218.7K Total
6704  Current Release:
6705    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
6706    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
6707
67082) iASL Compiler/Disassembler and Tools:
6709
6710iASL: Relax the alphanumeric restriction on _CID strings. These strings
6711are
6712"bus-specific" per the ACPI specification, and therefore any characters
6713are
6714acceptable. The only checks that can be performed are for a null string
6715and
6716perhaps for a leading asterisk. ACPICA BZ 886.
6717
6718iASL: Fixed a problem where a syntax error that caused a premature EOF
6719condition on the source file emitted a very confusing error message. The
6720premature EOF is now detected correctly. ACPICA BZ 891.
6721
6722Disassembler: Decode the AccessSize within a Generic Address Structure
6723(byte
6724access, word access, etc.) Note, this field does not allow arbitrary bit
6725access, the size is encoded as 1=byte, 2=word, 3=dword, and 4=qword.
6726
6727New: AcpiNames utility - Example namespace dump utility. Shows an example
6728of
6729ACPICA configuration for a minimal namespace dump utility. Uses table and
6730namespace managers, but no AML interpreter. Does not add any
6731functionality
6732over AcpiExec, it is a subset of AcpiExec. The purpose is to show how to
6733partition and configure ACPICA. ACPICA BZ 883.
6734
6735AML Debugger: Increased the debugger buffer size for method return
6736objects.
6737Was 4K, increased to 16K. Also enhanced error messages for debugger
6738method
6739execution, including the buffer overflow case.
6740
6741----------------------------------------
674213 October 2010. Summary of changes for version 20101013:
6743
67441) ACPI CA Core Subsystem:
6745
6746Added support to clear the PCIEXP_WAKE event. When clearing ACPI events,
6747now
6748clear the PCIEXP_WAKE_STS bit in the ACPI PM1 Status Register, via
6749HwClearAcpiStatus. Original change from Colin King. ACPICA BZ 880.
6750
6751Changed the type of the predefined namespace object _TZ from ThermalZone
6752to
6753Device. This was found to be confusing to the host software that
6754processes
6755the various thermal zones, since _TZ is not really a ThermalZone.
6756However,
6757a
6758Notify() can still be performed on it. ACPICA BZ 876. Suggestion from Rui
6759Zhang.
6760
6761Added Windows Vista SP2 to the list of supported _OSI strings. The actual
6762string is "Windows 2006 SP2".
6763
6764Eliminated duplicate code in AcpiUtExecute* functions. Now that the
6765nsrepair
6766code automatically repairs _HID-related strings, this type of code is no
6767longer needed in Execute_HID, Execute_CID, and Execute_UID. ACPICA BZ
6768878.
6769
6770Example Code and Data Size: These are the sizes for the OS-independent
6771acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6772debug version of the code includes the debug output trace mechanism and
6773has a
6774much larger code and data size.
6775
6776  Previous Release:
6777    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
6778    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
6779  Current Release:
6780    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
6781    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
6782
67832) iASL Compiler/Disassembler and Tools:
6784
6785iASL: Implemented additional compile-time validation for _HID strings.
6786The
6787non-hex prefix (such as "PNP" or "ACPI") must be uppercase, and the
6788length
6789of
6790the string must be exactly seven or eight characters. For both _HID and
6791_CID
6792strings, all characters must be alphanumeric. ACPICA BZ 874.
6793
6794iASL: Allow certain "null" resource descriptors. Some BIOS code creates
6795descriptors that are mostly or all zeros, with the expectation that they
6796will
6797be filled in at runtime. iASL now allows this as long as there is a
6798"resource
6799tag" (name) associated with the descriptor, which gives the ASL a handle
6800needed to modify the descriptor. ACPICA BZ 873.
6801
6802Added single-thread support to the generic Unix application OSL.
6803Primarily
6804for iASL support, this change removes the use of semaphores in the
6805single-
6806threaded ACPICA tools/applications - increasing performance. The
6807_MULTI_THREADED option was replaced by the (reverse) ACPI_SINGLE_THREADED
6808option. ACPICA BZ 879.
6809
6810AcpiExec: several fixes for the 64-bit version. Adds XSDT support and
6811support
6812for 64-bit DSDT/FACS addresses in the FADT. Lin Ming.
6813
6814iASL: Moved all compiler messages to a new file, aslmessages.h.
6815
6816----------------------------------------
681715 September 2010. Summary of changes for version 20100915:
6818
68191) ACPI CA Core Subsystem:
6820
6821Removed the AcpiOsDerivePciId OSL interface. The various host
6822implementations
6823of this function were not OS-dependent and are now obsolete and can be
6824removed from all host OSLs. This function has been replaced by
6825AcpiHwDerivePciId, which is now part of the ACPICA core code.
6826AcpiHwDerivePciId has been implemented without recursion. Adds one new
6827module, hwpci.c. ACPICA BZ 857.
6828
6829Implemented a dynamic repair for _HID and _CID strings. The following
6830problems are now repaired at runtime: 1) Remove a leading asterisk in the
6831string, and 2) the entire string is uppercased. Both repairs are in
6832accordance with the ACPI specification and will simplify host driver
6833code.
6834ACPICA BZ 871.
6835
6836The ACPI_THREAD_ID type is no longer configurable, internally it is now
6837always UINT64. This simplifies the ACPICA code, especially any printf
6838output.
6839UINT64 is the only common data type for all thread_id types across all
6840operating systems. It is now up to the host OSL to cast the native
6841thread_id
6842type to UINT64 before returning the value to ACPICA (via
6843AcpiOsGetThreadId).
6844Lin Ming, Bob Moore.
6845
6846Added the ACPI_INLINE type to enhance the ACPICA configuration. The
6847"inline"
6848keyword is not standard across compilers, and this type allows inline to
6849be
6850configured on a per-compiler basis. Lin Ming.
6851
6852Made the system global AcpiGbl_SystemAwakeAndRunning publicly
6853available.
6854Added an extern for this boolean in acpixf.h. Some hosts utilize this
6855value
6856during suspend/restore operations. ACPICA BZ 869.
6857
6858All code that implements error/warning messages with the "ACPI:" prefix
6859has
6860been moved to a new module, utxferror.c.
6861
6862The UINT64_OVERLAY was moved to utmath.c, which is the only module where
6863it
6864is used. ACPICA BZ 829. Lin Ming, Bob Moore.
6865
6866Example Code and Data Size: These are the sizes for the OS-independent
6867acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6868debug version of the code includes the debug output trace mechanism and
6869has a
6870much larger code and data size.
6871
6872  Previous Release:
6873    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
6874    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
6875  Current Release:
6876    Non-Debug Version:  89.9K Code, 19.0K Data, 108.9K Total
6877    Debug Version:     166.3K Code, 52.1K Data, 218.4K Total
6878
68792) iASL Compiler/Disassembler and Tools:
6880
6881iASL/Disassembler: Write ACPI errors to stderr instead of the output
6882file.
6883This keeps the output files free of random error messages that may
6884originate
6885from within the namespace/interpreter code. Used this opportunity to
6886merge
6887all ACPI:-style messages into a single new module, utxferror.c. ACPICA BZ
6888866. Lin Ming, Bob Moore.
6889
6890Tools: update some printfs for ansi warnings on size_t. Handle width
6891change
6892of size_t on 32-bit versus 64-bit generations. Lin Ming.
6893
6894----------------------------------------
689506 August 2010. Summary of changes for version 20100806:
6896
68971) ACPI CA Core Subsystem:
6898
6899Designed and implemented a new host interface to the _OSI support code.
6900This
6901will allow the host to dynamically add or remove multiple _OSI strings,
6902as
6903well as install an optional handler that is called for each _OSI
6904invocation.
6905Also added a new AML debugger command, 'osi' to display and modify the
6906global
6907_OSI string table, and test support in the AcpiExec utility. See the
6908ACPICA
6909reference manual for full details. Lin Ming, Bob Moore. ACPICA BZ 836.
6910New Functions:
6911    AcpiInstallInterface - Add an _OSI string.
6912    AcpiRemoveInterface - Delete an _OSI string.
6913    AcpiInstallInterfaceHandler - Install optional _OSI handler.
6914Obsolete Functions:
6915    AcpiOsValidateInterface - no longer used.
6916New Files:
6917    source/components/utilities/utosi.c
6918
6919Re-introduced the support to enable multi-byte transfers for Embedded
6920Controller (EC) operation regions. A reported problem was found to be a
6921bug
6922in the host OS, not in the multi-byte support. Previously, the maximum
6923data
6924size passed to the EC operation region handler was a single byte. There
6925are
6926often EC Fields larger than one byte that need to be transferred, and it
6927is
6928useful for the EC driver to lock these as a single transaction. This
6929change
6930enables single transfers larger than 8 bits. This effectively changes the
6931access to the EC space from ByteAcc to AnyAcc, and will probably require
6932changes to the host OS Embedded Controller driver to enable 16/32/64/256-
6933bit
6934transfers in addition to 8-bit transfers. Alexey Starikovskiy, Lin Ming.
6935
6936Fixed a problem with the prototype for AcpiOsReadPciConfiguration. The
6937prototype in acpiosxf.h had the output value pointer as a (void *).
6938It should be a (UINT64 *). This may affect some host OSL code.
6939
6940Fixed a couple problems with the recently modified Linux makefiles for
6941iASL
6942and AcpiExec. These new makefiles place the generated object files in the
6943local directory so that there can be no collisions between the files that
6944are
6945shared between them that are compiled with different options.
6946
6947Example Code and Data Size: These are the sizes for the OS-independent
6948acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
6949debug version of the code includes the debug output trace mechanism and
6950has a
6951much larger code and data size.
6952
6953  Previous Release:
6954    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
6955    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
6956  Current Release:
6957    Non-Debug Version:  89.1K Code, 19.0K Data, 108.1K Total
6958    Debug Version:     165.1K Code, 51.9K Data, 217.0K Total
6959
69602) iASL Compiler/Disassembler and Tools:
6961
6962iASL/Disassembler: Added a new option (-da, "disassemble all") to load
6963the
6964namespace from and disassemble an entire group of AML files. Useful for
6965loading all of the AML tables for a given machine (DSDT, SSDT1...SSDTn)
6966and
6967disassembling with one simple command. ACPICA BZ 865. Lin Ming.
6968
6969iASL: Allow multiple invocations of -e option. This change allows
6970multiple
6971uses of -e on the command line: "-e ssdt1.dat -e ssdt2.dat". ACPICA BZ
6972834.
6973Lin Ming.
6974
6975----------------------------------------
697602 July 2010. Summary of changes for version 20100702:
6977
69781) ACPI CA Core Subsystem:
6979
6980Implemented several updates to the recently added GPE reference count
6981support. The model for "wake" GPEs is changing to give the host OS
6982complete
6983control of these GPEs. Eventually, the ACPICA core will not execute any
6984_PRW
6985methods, since the host already must execute them. Also, additional
6986changes
6987were made to help ensure that the reference counts are kept in proper
6988synchronization with reality. Rafael J. Wysocki.
6989
69901) Ensure that GPEs are not enabled twice during initialization.
69912) Ensure that GPE enable masks stay in sync with the reference count.
69923) Do not inadvertently enable GPEs when writing GPE registers.
69934) Remove the internal wake reference counter and add new AcpiGpeWakeup
6994interface. This interface will set or clear individual GPEs for wakeup.
69955) Remove GpeType argument from AcpiEnable and AcpiDisable. These
6996interfaces
6997are now used for "runtime" GPEs only.
6998
6999Changed the behavior of the GPE install/remove handler interfaces. The
7000GPE
7001is
7002no longer disabled during this process, as it was found to cause problems
7003on
7004some machines. Rafael J. Wysocki.
7005
7006Reverted a change introduced in version 20100528 to enable Embedded
7007Controller multi-byte transfers. This change was found to cause problems
7008with
7009Index Fields and possibly Bank Fields. It will be reintroduced when these
7010problems have been resolved.
7011
7012Fixed a problem with references to Alias objects within Package Objects.
7013A
7014reference to an Alias within the definition of a Package was not always
7015resolved properly. Aliases to objects like Processors, Thermal zones,
7016etc.
7017were resolved to the actual object instead of a reference to the object
7018as
7019it
7020should be. Package objects are only allowed to contain integer, string,
7021buffer, package, and reference objects. Redhat bugzilla 608648.
7022
7023Example Code and Data Size: These are the sizes for the OS-independent
7024acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7025debug version of the code includes the debug output trace mechanism and
7026has a
7027much larger code and data size.
7028
7029  Previous Release:
7030    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
7031    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
7032  Current Release:
7033    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
7034    Debug Version:     164.0K Code, 51.5K Data, 215.5K Total
7035
70362) iASL Compiler/Disassembler and Tools:
7037
7038iASL: Implemented a new compiler subsystem to allow definition and
7039compilation of the non-AML ACPI tables such as FADT, MADT, SRAT, etc.
7040These
7041are called "ACPI Data Tables", and the new compiler is the "Data Table
7042Compiler". This compiler is intended to simplify the existing error-prone
7043process of creating these tables for the BIOS, as well as allowing the
7044disassembly, modification, recompilation, and override of existing ACPI
7045data
7046tables. See the iASL User Guide for detailed information.
7047
7048iASL: Implemented a new Template Generator option in support of the new
7049Data
7050Table Compiler. This option will create examples of all known ACPI tables
7051that can be used as the basis for table development. See the iASL
7052documentation and the -T option.
7053
7054Disassembler and headers: Added support for the WDDT ACPI table (Watchdog
7055Descriptor Table).
7056
7057Updated the Linux makefiles for iASL and AcpiExec to place the generated
7058object files in the local directory so that there can be no collisions
7059between the shared files between them that are generated with different
7060options.
7061
7062Added support for Mac OS X in the Unix OSL used for iASL and AcpiExec.
7063Use
7064the #define __APPLE__ to enable this support.
7065
7066----------------------------------------
706728 May 2010. Summary of changes for version 20100528:
7068
7069Note: The ACPI 4.0a specification was released on April 5, 2010 and is
7070available at www.acpi.info. This is primarily an errata release.
7071
70721) ACPI CA Core Subsystem:
7073
7074Undefined ACPI tables: We are looking for the definitions for the
7075following
7076ACPI tables that have been seen in the field: ATKG, IEIT, GSCI.
7077
7078Implemented support to enable multi-byte transfers for Embedded
7079Controller
7080(EC) operation regions. Previously, the maximum data size passed to the
7081EC
7082operation region handler was a single byte. There are often EC Fields
7083larger
7084than one byte that need to be transferred, and it is useful for the EC
7085driver
7086to lock these as a single transaction. This change enables single
7087transfers
7088larger than 8 bits. This effectively changes the access to the EC space
7089from
7090ByteAcc to AnyAcc, and will probably require changes to the host OS
7091Embedded
7092Controller driver to enable 16/32/64/256-bit transfers in addition to 8-
7093bit
7094transfers. Alexey Starikovskiy, Lin Ming
7095
7096Implemented a performance enhancement for namespace search and access.
7097This
7098change enhances the performance of namespace searches and walks by adding
7099a
7100backpointer to the parent in each namespace node. On large namespaces,
7101this
7102change can improve overall ACPI performance by up to 9X. Adding a pointer
7103to
7104each namespace node increases the overall size of the internal namespace
7105by
7106about 5%, since each namespace entry usually consists of both a namespace
7107node and an ACPI operand object. However, this is the first growth of the
7108namespace in ten years. ACPICA bugzilla 817. Alexey Starikovskiy.
7109
7110Implemented a performance optimization that reduces the number of
7111namespace
7112walks. On control method exit, only walk the namespace if the method is
7113known
7114to have created namespace objects outside of its local scope. Previously,
7115the
7116entire namespace was traversed on each control method exit. This change
7117can
7118improve overall ACPI performance by up to 3X. Alexey Starikovskiy, Bob
7119Moore.
7120
7121Added support to truncate I/O addresses to 16 bits for Windows
7122compatibility.
7123Some ASL code has been seen in the field that inadvertently has bits set
7124above bit 15. This feature is optional and is enabled if the BIOS
7125requests
7126any Windows OSI strings. It can also be enabled by the host OS. Matthew
7127Garrett, Bob Moore.
7128
7129Added support to limit the maximum time for the ASL Sleep() operator. To
7130prevent accidental deep sleeps, limit the maximum time that Sleep() will
7131actually sleep. Configurable, the default maximum is two seconds. ACPICA
7132bugzilla 854.
7133
7134Added run-time validation support for the _WDG and_WED Microsoft
7135predefined
7136methods. These objects are defined by "Windows Instrumentation", and are
7137not
7138part of the ACPI spec. ACPICA BZ 860.
7139
7140Expanded all statistic counters used during namespace and device
7141initialization from 16 to 32 bits in order to support very large
7142namespaces.
7143
7144Replaced all instances of %d in printf format specifiers with %u since
7145nearly
7146all integers in ACPICA are unsigned.
7147
7148Fixed the exception namestring for AE_WAKE_ONLY_GPE. Was incorrectly
7149returned
7150as AE_NO_HANDLER.
7151
7152Example Code and Data Size: These are the sizes for the OS-independent
7153acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7154debug version of the code includes the debug output trace mechanism and
7155has a
7156much larger code and data size.
7157
7158  Previous Release:
7159    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
7160    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
7161  Current Release:
7162    Non-Debug Version:  88.3K Code, 18.8K Data, 107.1K Total
7163    Debug Version:     164.1K Code, 51.5K Data, 215.6K Total
7164
71652) iASL Compiler/Disassembler and Tools:
7166
7167iASL: Added compiler support for the _WDG and_WED Microsoft predefined
7168methods. These objects are defined by "Windows Instrumentation", and are
7169not
7170part of the ACPI spec. ACPICA BZ 860.
7171
7172AcpiExec: added option to disable the memory tracking mechanism. The -dt
7173option will disable the tracking mechanism, which improves performance
7174considerably.
7175
7176AcpiExec: Restructured the command line options into -d (disable) and -e
7177(enable) options.
7178
7179----------------------------------------
718028 April 2010. Summary of changes for version 20100428:
7181
71821) ACPI CA Core Subsystem:
7183
7184Implemented GPE support for dynamically loaded ACPI tables. For all GPEs,
7185including FADT-based and GPE Block Devices, execute any _PRW methods in
7186the
7187new table, and process any _Lxx/_Exx GPE methods in the new table. Any
7188runtime GPE that is referenced by an _Lxx/_Exx method in the new table is
7189immediately enabled. Handles the FADT-defined GPEs as well as GPE Block
7190Devices. Provides compatibility with other ACPI implementations. Two new
7191files added, evgpeinit.c and evgpeutil.c. ACPICA BZ 833. Lin Ming, Bob
7192Moore.
7193
7194Fixed a regression introduced in version 20100331 within the table
7195manager
7196where initial table loading could fail. This was introduced in the fix
7197for
7198AcpiReallocateRootTable. Also, renamed some of fields in the table
7199manager
7200data structures to clarify their meaning and use.
7201
7202Fixed a possible allocation overrun during internal object copy in
7203AcpiUtCopySimpleObject. The original code did not correctly handle the
7204case
7205where the object to be copied was a namespace node. Lin Ming. ACPICA BZ
7206847.
7207
7208Updated the allocation dump routine, AcpiUtDumpAllocation and fixed a
7209possible access beyond end-of-allocation. Also, now fully validate
7210descriptor
7211(size and type) before output. Lin Ming, Bob Moore. ACPICA BZ 847
7212
7213Example Code and Data Size: These are the sizes for the OS-independent
7214acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7215debug version of the code includes the debug output trace mechanism and
7216has a
7217much larger code and data size.
7218
7219  Previous Release:
7220    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
7221    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
7222  Current Release:
7223    Non-Debug Version:  88.4K Code, 18.8K Data, 107.2K Total
7224    Debug Version:     164.2K Code, 51.5K Data, 215.7K Total
7225
72262) iASL Compiler/Disassembler and Tools:
7227
7228iASL: Implemented Min/Max/Len/Gran validation for address resource
7229descriptors. This change implements validation for the address fields
7230that
7231are common to all address-type resource descriptors. These checks are
7232implemented: Checks for valid Min/Max, length within the Min/Max window,
7233valid granularity, Min/Max a multiple of granularity, and _MIF/_MAF as
7234per
7235table 6-40 in the ACPI 4.0a specification. Also split the large
7236aslrestype1.c
7237and aslrestype2.c files into five new files. ACPICA BZ 840.
7238
7239iASL: Added support for the _Wxx predefined names. This support was
7240missing
7241and these names were not recognized by the compiler as valid predefined
7242names. ACPICA BZ 851.
7243
7244iASL: Added an error for all predefined names that are defined to return
7245no
7246value and thus must be implemented as Control Methods. These include all
7247of
7248the _Lxx, _Exx, _Wxx, and _Qxx names, as well as some other miscellaneous
7249names such as _DIS, _INI, _IRC, _OFF, _ON, and _PSx. ACPICA BZ 850, 856.
7250
7251iASL: Implemented the -ts option to emit hex AML data in ASL format, as
7252an
7253ASL Buffer. Allows ACPI tables to be easily included within ASL files, to
7254be
7255dynamically loaded via the Load() operator. Also cleaned up output for
7256the
7257-
7258ta and -tc options. ACPICA BZ 853.
7259
7260Tests: Added a new file with examples of extended iASL error checking.
7261Demonstrates the advanced error checking ability of the iASL compiler.
7262Available at tests/misc/badcode.asl.
7263
7264----------------------------------------
726531 March 2010. Summary of changes for version 20100331:
7266
72671) ACPI CA Core Subsystem:
7268
7269Completed a major update for the GPE support in order to improve support
7270for
7271shared GPEs and to simplify both host OS and ACPICA code. Added a
7272reference
7273count mechanism to support shared GPEs that require multiple device
7274drivers.
7275Several external interfaces have changed. One external interface has been
7276removed. One new external interface was added. Most of the GPE external
7277interfaces now use the GPE spinlock instead of the events mutex (and the
7278Flags parameter for many GPE interfaces has been removed.) See the
7279updated
7280ACPICA Programmer Reference for details. Matthew Garrett, Bob Moore,
7281Rafael
7282Wysocki. ACPICA BZ 831.
7283
7284Changed:
7285    AcpiEnableGpe, AcpiDisableGpe, AcpiClearGpe, AcpiGetGpeStatus
7286Removed:
7287    AcpiSetGpeType
7288New:
7289    AcpiSetGpe
7290
7291Implemented write support for DataTable operation regions. These regions
7292are
7293defined via the DataTableRegion() operator. Previously, only read support
7294was
7295implemented. The ACPI specification allows DataTableRegions to be
7296read/write,
7297however.
7298
7299Implemented a new subsystem option to force a copy of the DSDT to local
7300memory. Optionally copy the entire DSDT to local memory (instead of
7301simply
7302mapping it.) There are some (albeit very rare) BIOSs that corrupt or
7303replace
7304the original DSDT, creating the need for this option. Default is FALSE,
7305do
7306not copy the DSDT.
7307
7308Implemented detection of a corrupted or replaced DSDT. This change adds
7309support to detect a DSDT that has been corrupted and/or replaced from
7310outside
7311the OS (by firmware). This is typically catastrophic for the system, but
7312has
7313been seen on some machines. Once this problem has been detected, the DSDT
7314copy option can be enabled via system configuration. Lin Ming, Bob Moore.
7315
7316Fixed two problems with AcpiReallocateRootTable during the root table
7317copy.
7318When copying the root table to the new allocation, the length used was
7319incorrect. The new size was used instead of the current table size,
7320meaning
7321too much data was copied. Also, the count of available slots for ACPI
7322tables
7323was not set correctly. Alexey Starikovskiy, Bob Moore.
7324
7325Example Code and Data Size: These are the sizes for the OS-independent
7326acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7327debug version of the code includes the debug output trace mechanism and
7328has a
7329much larger code and data size.
7330
7331  Previous Release:
7332    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
7333    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
7334  Current Release:
7335    Non-Debug Version:  87.9K Code, 18.6K Data, 106.5K Total
7336    Debug Version:     163.5K Code, 51.3K Data, 214.8K Total
7337
73382) iASL Compiler/Disassembler and Tools:
7339
7340iASL: Implement limited typechecking for values returned from predefined
7341control methods. The type of any returned static (unnamed) object is now
7342validated. For example, Return(1). ACPICA BZ 786.
7343
7344iASL: Fixed a predefined name object verification regression. Fixes a
7345problem
7346introduced in version 20100304. An error is incorrectly generated if a
7347predefined name is declared as a static named object with a value defined
7348using the keywords "Zero", "One", or "Ones". Lin Ming.
7349
7350iASL: Added Windows 7 support for the -g option (get local ACPI tables)
7351by
7352reducing the requested registry access rights. ACPICA BZ 842.
7353
7354Disassembler: fixed a possible fault when generating External()
7355statements.
7356Introduced in commit ae7d6fd: Properly handle externals with parent-
7357prefix
7358(carat). Fixes a string length allocation calculation. Lin Ming.
7359
7360----------------------------------------
736104 March 2010. Summary of changes for version 20100304:
7362
73631) ACPI CA Core Subsystem:
7364
7365Fixed a possible problem with the AML Mutex handling function
7366AcpiExReleaseMutex where the function could fault under the very rare
7367condition when the interpreter has blocked, the interpreter lock is
7368released,
7369the interpreter is then reentered via the same thread, and attempts to
7370acquire an AML mutex that was previously acquired. FreeBSD report 140979.
7371Lin
7372Ming.
7373
7374Implemented additional configuration support for the AML "Debug Object".
7375Output from the debug object can now be enabled via a global variable,
7376AcpiGbl_EnableAmlDebugObject. This will assist with remote machine
7377debugging.
7378This debug output is now available in the release version of ACPICA
7379instead
7380of just the debug version. Also, the entire debug output module can now
7381be
7382configured out of the ACPICA build if desired. One new file added,
7383executer/exdebug.c. Lin Ming, Bob Moore.
7384
7385Added header support for the ACPI MCHI table (Management Controller Host
7386Interface Table). This table was added in ACPI 4.0, but the defining
7387document
7388has only recently become available.
7389
7390Standardized output of integer values for ACPICA warnings/errors. Always
7391use
73920x prefix for hex output, always use %u for unsigned integer decimal
7393output.
7394Affects ACPI_INFO, ACPI_ERROR, ACPI_EXCEPTION, and ACPI_WARNING (about
7395400
7396invocations.) These invocations were converted from the original
7397ACPI_DEBUG_PRINT invocations and were not consistent. ACPICA BZ 835.
7398
7399Example Code and Data Size: These are the sizes for the OS-independent
7400acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7401debug version of the code includes the debug output trace mechanism and
7402has a
7403much larger code and data size.
7404
7405  Previous Release:
7406    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
7407    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
7408  Current Release:
7409    Non-Debug Version:  87.5K Code, 18.4K Data, 105.9K Total
7410    Debug Version:     163.4K Code, 51.1K Data, 214.5K Total
7411
74122) iASL Compiler/Disassembler and Tools:
7413
7414iASL: Implemented typechecking support for static (non-control method)
7415predefined named objects that are declared with the Name() operator. For
7416example, the type of this object is now validated to be of type Integer:
7417Name(_BBN, 1). This change migrates the compiler to using the core
7418predefined
7419name table instead of maintaining a local version. Added a new file,
7420aslpredef.c. ACPICA BZ 832.
7421
7422Disassembler: Added support for the ACPI 4.0 MCHI table.
7423
7424----------------------------------------
742521 January 2010. Summary of changes for version 20100121:
7426
74271) ACPI CA Core Subsystem:
7428
7429Added the 2010 copyright to all module headers and signons. This affects
7430virtually every file in the ACPICA core subsystem, the iASL compiler, the
7431tools/utilities, and the test suites.
7432
7433Implemented a change to the AcpiGetDevices interface to eliminate
7434unnecessary
7435invocations of the _STA method. In the case where a specific _HID is
7436requested, do not run _STA until a _HID match is found. This eliminates
7437potentially dozens of _STA calls during a search for a particular
7438device/HID,
7439which in turn can improve boot times. ACPICA BZ 828. Lin Ming.
7440
7441Implemented an additional repair for predefined method return values.
7442Attempt
7443to repair unexpected NULL elements within returned Package objects.
7444Create
7445an
7446Integer of value zero, a NULL String, or a zero-length Buffer as
7447appropriate.
7448ACPICA BZ 818. Lin Ming, Bob Moore.
7449
7450Removed the obsolete ACPI_INTEGER data type. This type was introduced as
7451the
7452code was migrated from ACPI 1.0 (with 32-bit AML integers) to ACPI 2.0
7453(with
745464-bit AML integers). It is now obsolete and this change removes it from
7455the
7456ACPICA code base, replaced by UINT64. The original typedef has been
7457retained
7458for now for compatibility with existing device driver code. ACPICA BZ
7459824.
7460
7461Removed the unused UINT32_STRUCT type, and the obsolete Integer64 field
7462in
7463the parse tree object.
7464
7465Added additional warning options for the gcc-4 generation. Updated the
7466source
7467accordingly. This includes some code restructuring to eliminate
7468unreachable
7469code, elimination of some gotos, elimination of unused return values,
7470some
7471additional casting, and removal of redundant declarations.
7472
7473Example Code and Data Size: These are the sizes for the OS-independent
7474acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7475debug version of the code includes the debug output trace mechanism and
7476has a
7477much larger code and data size.
7478
7479  Previous Release:
7480    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
7481    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
7482  Current Release:
7483    Non-Debug Version:  87.1K Code, 18.0K Data, 105.1K Total
7484    Debug Version:     163.5K Code, 50.9K Data, 214.4K Total
7485
74862) iASL Compiler/Disassembler and Tools:
7487
7488No functional changes for this release.
7489
7490----------------------------------------
749114 December 2009. Summary of changes for version 20091214:
7492
74931) ACPI CA Core Subsystem:
7494
7495Enhanced automatic data type conversions for predefined name repairs.
7496This
7497change expands the automatic repairs/conversions for predefined name
7498return
7499values to make Integers, Strings, and Buffers fully interchangeable.
7500Also,
7501a
7502Buffer can be converted to a Package of Integers if necessary. The
7503nsrepair.c
7504module was completely restructured. Lin Ming, Bob Moore.
7505
7506Implemented automatic removal of null package elements during predefined
7507name
7508repairs. This change will automatically remove embedded and trailing NULL
7509package elements from returned package objects that are defined to
7510contain
7511a
7512variable number of sub-packages. The driver is then presented with a
7513package
7514with no null elements to deal with. ACPICA BZ 819.
7515
7516Implemented a repair for the predefined _FDE and _GTM names. The expected
7517return value for both names is a Buffer of 5 DWORDs. This repair fixes
7518two
7519possible problems (both seen in the field), where a package of integers
7520is
7521returned, or a buffer of BYTEs is returned. With assistance from Jung-uk
7522Kim.
7523
7524Implemented additional module-level code support. This change will
7525properly
7526execute module-level code that is not at the root of the namespace (under
7527a
7528Device object, etc.). Now executes the code within the current scope
7529instead
7530of the root. ACPICA BZ 762. Lin Ming.
7531
7532Fixed possible mutex acquisition errors when running _REG methods. Fixes
7533a
7534problem where mutex errors can occur when running a _REG method that is
7535in
7536the same scope as a method-defined operation region or an operation
7537region
7538under a module-level IF block. This type of code is rare, so the problem
7539has
7540not been seen before. ACPICA BZ 826. Lin Ming, Bob Moore.
7541
7542Fixed a possible memory leak during module-level code execution. An
7543object
7544could be leaked for each block of executed module-level code if the
7545interpreter slack mode is enabled This change deletes any implicitly
7546returned
7547object from the module-level code block. Lin Ming.
7548
7549Removed messages for successful predefined repair(s). The repair
7550mechanism
7551was considered too wordy. Now, messages are only unconditionally emitted
7552if
7553the return object cannot be repaired. Existing messages for successful
7554repairs were converted to ACPI_DEBUG_PRINT messages for now. ACPICA BZ
7555827.
7556
7557Example Code and Data Size: These are the sizes for the OS-independent
7558acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7559debug version of the code includes the debug output trace mechanism and
7560has a
7561much larger code and data size.
7562
7563  Previous Release:
7564    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
7565    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
7566  Current Release:
7567    Non-Debug Version:  87.0K Code, 18.0K Data, 105.0K Total
7568    Debug Version:     163.4K Code, 50.8K Data, 214.2K Total
7569
75702) iASL Compiler/Disassembler and Tools:
7571
7572iASL: Fixed a regression introduced in 20091112 where intermediate .SRC
7573files
7574were no longer automatically removed at the termination of the compile.
7575
7576acpiexec: Implemented the -f option to specify default region fill value.
7577This option specifies the value used to initialize buffers that simulate
7578operation regions. Default value is zero. Useful for debugging problems
7579that
7580depend on a specific initial value for a region or field.
7581
7582----------------------------------------
758312 November 2009. Summary of changes for version 20091112:
7584
75851) ACPI CA Core Subsystem:
7586
7587Implemented a post-order callback to AcpiWalkNamespace. The existing
7588interface only has a pre-order callback. This change adds an additional
7589parameter for a post-order callback which will be more useful for bus
7590scans.
7591ACPICA BZ 779. Lin Ming. Updated the ACPICA Programmer Reference.
7592
7593Modified the behavior of the operation region memory mapping cache for
7594SystemMemory. Ensure that the memory mappings created for operation
7595regions
7596do not cross 4K page boundaries. Crossing a page boundary while mapping
7597regions can cause kernel warnings on some hosts if the pages have
7598different
7599attributes. Such regions are probably BIOS bugs, and this is the
7600workaround.
7601Linux BZ 14445. Lin Ming.
7602
7603Implemented an automatic repair for predefined methods that must return
7604sorted lists. This change will repair (by sorting) packages returned by
7605_ALR,
7606_PSS, and _TSS. Drivers can now assume that the packages are correctly
7607sorted
7608and do not contain NULL package elements. Adds one new file,
7609namespace/nsrepair2.c. ACPICA BZ 784. Lin Ming, Bob Moore.
7610
7611Fixed a possible fault during predefined name validation if a return
7612Package
7613object contains NULL elements. Also adds a warning if a NULL element is
7614followed by any non-null elements. ACPICA BZ 813, 814. Future enhancement
7615may
7616include repair or removal of all such NULL elements where possible.
7617
7618Implemented additional module-level executable AML code support. This
7619change
7620will execute module-level code that is not at the root of the namespace
7621(under a Device object, etc.) at table load time. Module-level executable
7622AML
7623code has been illegal since ACPI 2.0. ACPICA BZ 762. Lin Ming.
7624
7625Implemented a new internal function to create Integer objects. This
7626function
7627simplifies miscellaneous object creation code. ACPICA BZ 823.
7628
7629Reduced the severity of predefined repair messages, Warning to Info.
7630Since
7631the object was successfully repaired, a warning is too severe. Reduced to
7632an
7633info message for now. These messages may eventually be changed to debug-
7634only.
7635ACPICA BZ 812.
7636
7637Example Code and Data Size: These are the sizes for the OS-independent
7638acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7639debug version of the code includes the debug output trace mechanism and
7640has a
7641much larger code and data size.
7642
7643  Previous Release:
7644    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
7645    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
7646  Current Release:
7647    Non-Debug Version:  86.6K Code, 18.2K Data, 104.8K Total
7648    Debug Version:     162.7K Code, 50.8K Data, 213.5K Total
7649
76502) iASL Compiler/Disassembler and Tools:
7651
7652iASL: Implemented Switch() with While(1) so that Break works correctly.
7653This
7654change correctly implements the Switch operator with a surrounding
7655While(1)
7656so that the Break operator works as expected. ACPICA BZ 461. Lin Ming.
7657
7658iASL: Added a message if a package initializer list is shorter than
7659package
7660length. Adds a new remark for a Package() declaration if an initializer
7661list
7662exists, but is shorter than the declared length of the package. Although
7663technically legal, this is probably a coding error and it is seen in the
7664field. ACPICA BZ 815. Lin Ming, Bob Moore.
7665
7666iASL: Fixed a problem where the compiler could fault after the maximum
7667number
7668of errors was reached (200).
7669
7670acpixtract: Fixed a possible warning for pointer cast if the compiler
7671warning
7672level set very high.
7673
7674----------------------------------------
767513 October 2009. Summary of changes for version 20091013:
7676
76771) ACPI CA Core Subsystem:
7678
7679Fixed a problem where an Operation Region _REG method could be executed
7680more
7681than once. If a custom address space handler is installed by the host
7682before
7683the "initialize operation regions" phase of the ACPICA initialization,
7684any
7685_REG methods for that address space could be executed twice. This change
7686fixes the problem. ACPICA BZ 427. Lin Ming.
7687
7688Fixed a possible memory leak for the Scope() ASL operator. When the exact
7689invocation of "Scope(\)" is executed (change scope to root), one internal
7690operand object was leaked. Lin Ming.
7691
7692Implemented a run-time repair for the _MAT predefined method. If the _MAT
7693return value is defined as a Field object in the AML, and the field
7694size is less than or equal to the default width of an integer (32 or
769564),_MAT
7696can incorrectly return an Integer instead of a Buffer. ACPICA now
7697automatically repairs this problem. ACPICA BZ 810.
7698
7699Implemented a run-time repair for the _BIF and _BIX predefined methods.
7700The
7701"OEM Information" field is often incorrectly returned as an Integer with
7702value zero if the field is not supported by the platform. This is due to
7703an
7704ambiguity in the ACPI specification. The field should always be a string.
7705ACPICA now automatically repairs this problem by returning a NULL string
7706within the returned Package. ACPICA BZ 807.
7707
7708Example Code and Data Size: These are the sizes for the OS-independent
7709acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7710debug version of the code includes the debug output trace mechanism and
7711has a
7712much larger code and data size.
7713
7714  Previous Release:
7715    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
7716    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
7717  Current Release:
7718    Non-Debug Version:  85.8K Code, 18.0K Data, 103.8K Total
7719    Debug Version:     161.8K Code, 50.6K Data, 212.4K Total
7720
77212) iASL Compiler/Disassembler and Tools:
7722
7723Disassembler: Fixed a problem where references to external symbols that
7724contained one or more parent-prefixes (carats) were not handled
7725correctly,
7726possibly causing a fault. ACPICA BZ 806. Lin Ming.
7727
7728Disassembler: Restructured the code so that all functions that handle
7729external symbols are in a single module. One new file is added,
7730common/dmextern.c.
7731
7732AML Debugger: Added a max count argument for the Batch command (which
7733executes multiple predefined methods within the namespace.)
7734
7735iASL: Updated the compiler documentation (User Reference.) Available at
7736http://www.acpica.org/documentation/. ACPICA BZ 750.
7737
7738AcpiXtract: Updated for Lint and other formatting changes. Close all open
7739files.
7740
7741----------------------------------------
774203 September 2009. Summary of changes for version 20090903:
7743
77441) ACPI CA Core Subsystem:
7745
7746For Windows Vista compatibility, added the automatic execution of an _INI
7747method located at the namespace root (\_INI). This method is executed at
7748table load time. This support is in addition to the automatic execution
7749of
7750\_SB._INI. Lin Ming.
7751
7752Fixed a possible memory leak in the interpreter for AML package objects
7753if
7754the package initializer list is longer than the defined size of the
7755package.
7756This apparently can only happen if the BIOS changes the package size on
7757the
7758fly (seen in a _PSS object), as ASL compilers do not allow this. The
7759interpreter will truncate the package to the defined size (and issue an
7760error
7761message), but previously could leave the extra objects undeleted if they
7762were
7763pre-created during the argument processing (such is the case if the
7764package
7765consists of a number of sub-packages as in the _PSS.) ACPICA BZ 805.
7766
7767Fixed a problem seen when a Buffer or String is stored to itself via ASL.
7768This has been reported in the field. Previously, ACPICA would zero out
7769the
7770buffer/string. Now, the operation is treated as a noop. Provides Windows
7771compatibility. ACPICA BZ 803. Lin Ming.
7772
7773Removed an extraneous error message for ASL constructs of the form
7774Store(LocalX,LocalX) when LocalX is uninitialized. These curious
7775statements
7776are seen in many BIOSs and are once again treated as NOOPs and no error
7777is
7778emitted when they are encountered. ACPICA BZ 785.
7779
7780Fixed an extraneous warning message if a _DSM reserved method returns a
7781Package object. _DSM can return any type of object, so validation on the
7782return type cannot be performed. ACPICA BZ 802.
7783
7784Example Code and Data Size: These are the sizes for the OS-independent
7785acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7786debug version of the code includes the debug output trace mechanism and
7787has a
7788much larger code and data size.
7789
7790  Previous Release:
7791    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
7792    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
7793  Current Release:
7794    Non-Debug Version:  85.6K Code, 18.0K Data, 103.6K Total
7795    Debug Version:     161.7K Code, 50.9K Data, 212.6K Total
7796
77972) iASL Compiler/Disassembler and Tools:
7798
7799iASL: Fixed a problem with the use of the Alias operator and Resource
7800Templates. The correct alias is now constructed and no error is emitted.
7801ACPICA BZ 738.
7802
7803iASL: Implemented the -I option to specify additional search directories
7804for
7805include files. Allows multiple additional search paths for include files.
7806Directories are searched in the order specified on the command line
7807(after
7808the local directory is searched.) ACPICA BZ 800.
7809
7810iASL: Fixed a problem where the full pathname for include files was not
7811emitted for warnings/errors. This caused the IDE support to not work
7812properly. ACPICA BZ 765.
7813
7814iASL: Implemented the -@ option to specify a Windows-style response file
7815containing additional command line options. ACPICA BZ 801.
7816
7817AcpiExec: Added support to load multiple AML files simultaneously (such
7818as
7819a
7820DSDT and multiple SSDTs). Also added support for wildcards within the AML
7821pathname. These features allow all machine tables to be easily loaded and
7822debugged together. ACPICA BZ 804.
7823
7824Disassembler: Added missing support for disassembly of HEST table Error
7825Bank
7826subtables.
7827
7828----------------------------------------
782930 July 2009. Summary of changes for version 20090730:
7830
7831The ACPI 4.0 implementation for ACPICA is complete with this release.
7832
78331) ACPI CA Core Subsystem:
7834
7835ACPI 4.0: Added header file support for all new and changed ACPI tables.
7836Completely new tables are: IBFT, IVRS, MSCT, and WAET. Tables that are
7837new
7838for ACPI 4.0, but have previously been supported in ACPICA are: CPEP,
7839BERT,
7840EINJ, ERST, and HEST. Other newly supported tables are: UEFI and WDAT.
7841There
7842have been some ACPI 4.0 changes to other existing tables. Split the large
7843actbl1.h header into the existing actbl2.h header. ACPICA BZ 774.
7844
7845ACPI 4.0: Implemented predefined name validation for all new names. There
7846are
784731 new names in ACPI 4.0. The predefined validation module was split into
7848two
7849files. The new file is namespace/nsrepair.c. ACPICA BZ 770.
7850
7851Implemented support for so-called "module-level executable code". This is
7852executable AML code that exists outside of any control method and is
7853intended
7854to be executed at table load time. Although illegal since ACPI 2.0, this
7855type
7856of code still exists and is apparently still being created. Blocks of
7857this
7858code are now detected and executed as intended. Currently, the code
7859blocks
7860must exist under either an If, Else, or While construct; these are the
7861typical cases seen in the field. ACPICA BZ 762. Lin Ming.
7862
7863Implemented an automatic dynamic repair for predefined names that return
7864nested Package objects. This applies to predefined names that are defined
7865to
7866return a variable-length Package of sub-packages. If the number of sub-
7867packages is one, BIOS code is occasionally seen that creates a simple
7868single
7869package with no sub-packages. This code attempts to fix the problem by
7870wrapping a new package object around the existing package. These methods
7871can
7872be repaired: _ALR, _CSD, _HPX, _MLS, _PRT, _PSS, _TRT, and _TSS. ACPICA
7873BZ
7874790.
7875
7876Fixed a regression introduced in 20090625 for the AcpiGetDevices
7877interface.
7878The _HID/_CID matching was broken and no longer matched IDs correctly.
7879ACPICA
7880BZ 793.
7881
7882Fixed a problem with AcpiReset where the reset would silently fail if the
7883register was one of the protected I/O ports. AcpiReset now bypasses the
7884port
7885validation mechanism. This may eventually be driven into the
7886AcpiRead/Write
7887interfaces.
7888
7889Fixed a regression related to the recent update of the AcpiRead/Write
7890interfaces. A sleep/suspend could fail if the optional PM2 Control
7891register
7892does not exist during an attempt to write the Bus Master Arbitration bit.
7893(However, some hosts already delete the code that writes this bit, and
7894the
7895code may in fact be obsolete at this date.) ACPICA BZ 799.
7896
7897Fixed a problem where AcpiTerminate could fault if inadvertently called
7898twice
7899in succession. ACPICA BZ 795.
7900
7901Example Code and Data Size: These are the sizes for the OS-independent
7902acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7903debug version of the code includes the debug output trace mechanism and
7904has a
7905much larger code and data size.
7906
7907  Previous Release:
7908    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
7909    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
7910  Current Release:
7911    Non-Debug Version:  85.5K Code, 18.0K Data, 103.5K Total
7912    Debug Version:     161.6K Code, 50.9K Data, 212.5K Total
7913
79142) iASL Compiler/Disassembler and Tools:
7915
7916ACPI 4.0: Implemented disassembler support for all new ACPI tables and
7917changes to existing tables. ACPICA BZ 775.
7918
7919----------------------------------------
792025 June 2009. Summary of changes for version 20090625:
7921
7922The ACPI 4.0 Specification was released on June 16 and is available at
7923www.acpi.info. ACPICA implementation of ACPI 4.0 is underway and will
7924continue for the next few releases.
7925
79261) ACPI CA Core Subsystem:
7927
7928ACPI 4.0: Implemented interpreter support for the IPMI operation region
7929address space. Includes support for bi-directional data buffers and an
7930IPMI
7931address space handler (to be installed by an IPMI device driver.) ACPICA
7932BZ
7933773. Lin Ming.
7934
7935ACPI 4.0: Added changes for existing ACPI tables - FACS and SRAT.
7936Includes
7937support in both the header files and the disassembler.
7938
7939Completed a major update for the AcpiGetObjectInfo external interface.
7940Changes include:
7941 - Support for variable, unlimited length HID, UID, and CID strings.
7942 - Support Processor objects the same as Devices (HID,UID,CID,ADR,STA,
7943etc.)
7944 - Call the _SxW power methods on behalf of a device object.
7945 - Determine if a device is a PCI root bridge.
7946 - Change the ACPI_BUFFER parameter to ACPI_DEVICE_INFO.
7947These changes will require an update to all callers of this interface.
7948See
7949the updated ACPICA Programmer Reference for details. One new source file
7950has
7951been added - utilities/utids.c. ACPICA BZ 368, 780.
7952
7953Updated the AcpiRead and AcpiWrite external interfaces to support 64-bit
7954transfers. The Value parameter has been extended from 32 bits to 64 bits
7955in
7956order to support new ACPI 4.0 tables. These changes will require an
7957update
7958to
7959all callers of these interfaces. See the ACPICA Programmer Reference for
7960details. ACPICA BZ 768.
7961
7962Fixed several problems with AcpiAttachData. The handler was not invoked
7963when
7964the host node was deleted. The data sub-object was not automatically
7965deleted
7966when the host node was deleted. The interface to the handler had an
7967unused
7968parameter, this was removed. ACPICA BZ 778.
7969
7970Enhanced the function that dumps ACPI table headers. All non-printable
7971characters in the string fields are now replaced with '?' (Signature,
7972OemId,
7973OemTableId, and CompilerId.) ACPI tables with non-printable characters in
7974these fields are occasionally seen in the field. ACPICA BZ 788.
7975
7976Fixed a problem with predefined method repair code where the code that
7977attempts to repair/convert an object of incorrect type is only executed
7978on
7979the first time the predefined method is called. The mechanism that
7980disables
7981warnings on subsequent calls was interfering with the repair mechanism.
7982ACPICA BZ 781.
7983
7984Fixed a possible memory leak in the predefined validation/repair code
7985when
7986a
7987buffer is automatically converted to an expected string object.
7988
7989Removed obsolete 16-bit files from the distribution and from the current
7990git
7991tree head. ACPICA BZ 776.
7992
7993Example Code and Data Size: These are the sizes for the OS-independent
7994acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
7995debug version of the code includes the debug output trace mechanism and
7996has a
7997much larger code and data size.
7998
7999  Previous Release:
8000    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
8001    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
8002  Current Release:
8003    Non-Debug Version:  84.7K Code, 17.8K Data, 102.5K Total
8004    Debug Version:     160.5K Code, 50.6K Data, 211.1K Total
8005
80062) iASL Compiler/Disassembler and Tools:
8007
8008ACPI 4.0: iASL and Disassembler - implemented support for the new IPMI
8009operation region keyword. ACPICA BZ 771, 772. Lin Ming.
8010
8011ACPI 4.0: iASL - implemented compile-time validation support for all new
8012predefined names and control methods (31 total). ACPICA BZ 769.
8013
8014----------------------------------------
801521 May 2009. Summary of changes for version 20090521:
8016
80171) ACPI CA Core Subsystem:
8018
8019Disabled the preservation of the SCI enable bit in the PM1 control
8020register.
8021The SCI enable bit (bit 0, SCI_EN) is defined by the ACPI specification
8022to
8023be
8024a "preserved" bit - "OSPM always preserves this bit position", section
80254.7.3.2.1. However, some machines fail if this bit is in fact preserved
8026because the bit needs to be explicitly set by the OS as a workaround. No
8027machines fail if the bit is not preserved. Therefore, ACPICA no longer
8028attempts to preserve this bit.
8029
8030Fixed a problem in AcpiRsGetPciRoutingTableLength where an invalid or
8031incorrectly formed _PRT package could cause a fault. Added validation to
8032ensure that each package element is actually a sub-package.
8033
8034Implemented a new interface to install or override a single control
8035method,
8036AcpiInstallMethod. This interface is useful when debugging in order to
8037repair
8038an existing method or to install a missing method without having to
8039override
8040the entire ACPI table. See the ACPICA Programmer Reference for use and
8041examples. Lin Ming, Bob Moore.
8042
8043Fixed several reference count issues with the DdbHandle object that is
8044created from a Load or LoadTable operator. Prevent premature deletion of
8045the
8046object. Also, mark the object as invalid once the table has been
8047unloaded.
8048This is needed because the handle itself may not be deleted after the
8049table
8050unload, depending on whether it has been stored in a named object by the
8051caller. Lin Ming.
8052
8053Fixed a problem with Mutex Sync Levels. Fixed a problem where if multiple
8054mutexes of the same sync level are acquired but then not released in
8055strict
8056opposite order, the internally maintained Current Sync Level becomes
8057confused
8058and can cause subsequent execution errors. ACPICA BZ 471.
8059
8060Changed the allowable release order for ASL mutex objects. The ACPI 4.0
8061specification has been changed to make the SyncLevel for mutex objects
8062more
8063useful. When releasing a mutex, the SyncLevel of the mutex must now be
8064the
8065same as the current sync level. This makes more sense than the previous
8066rule
8067(SyncLevel less than or equal). This change updates the code to match the
8068specification.
8069
8070Fixed a problem with the local version of the AcpiOsPurgeCache function.
8071The
8072(local) cache must be locked during all cache object deletions. Andrew
8073Baumann.
8074
8075Updated the Load operator to use operation region interfaces. This
8076replaces
8077direct memory mapping with region access calls. Now, all region accesses
8078go
8079through the installed region handler as they should.
8080
8081Simplified and optimized the NsGetNextNode function. Reduced parameter
8082count
8083and reduced code for this frequently used function.
8084
8085Example Code and Data Size: These are the sizes for the OS-independent
8086acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8087debug version of the code includes the debug output trace mechanism and
8088has a
8089much larger code and data size.
8090
8091  Previous Release:
8092    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
8093    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
8094  Current Release:
8095    Non-Debug Version:  83.4K Code, 17.5K Data, 100.9K Total
8096    Debug Version:     158.9K Code, 50.0K Data, 208.9K Total
8097
80982) iASL Compiler/Disassembler and Tools:
8099
8100Disassembler: Fixed some issues with DMAR, HEST, MADT tables. Some
8101problems
8102with sub-table disassembly and handling invalid sub-tables. Attempt
8103recovery
8104after an invalid sub-table ID.
8105
8106----------------------------------------
810722 April 2009. Summary of changes for version 20090422:
8108
81091) ACPI CA Core Subsystem:
8110
8111Fixed a compatibility issue with the recently released I/O port
8112protection
8113mechanism. For windows compatibility, 1) On a port protection violation,
8114simply ignore the request and do not return an exception (allow the
8115control
8116method to continue execution.) 2) If only part of the request overlaps a
8117protected port, read/write the individual ports that are not protected.
8118Linux
8119BZ 13036. Lin Ming
8120
8121Enhanced the execution of the ASL/AML BreakPoint operator so that it
8122actually
8123breaks into the AML debugger if the debugger is present. This matches the
8124ACPI-defined behavior.
8125
8126Fixed several possible warnings related to the use of the configurable
8127ACPI_THREAD_ID. This type can now be configured as either an integer or a
8128pointer with no warnings. Also fixes several warnings in printf-like
8129statements for the 64-bit build when the type is configured as a pointer.
8130ACPICA BZ 766, 767.
8131
8132Fixed a number of possible warnings when compiling with gcc 4+ (depending
8133on
8134warning options.) Examples include printf formats, aliasing, unused
8135globals,
8136missing prototypes, missing switch default statements, use of non-ANSI
8137library functions, use of non-ANSI constructs. See generate/unix/Makefile
8138for
8139a list of warning options used with gcc 3 and 4. ACPICA BZ 735.
8140
8141Example Code and Data Size: These are the sizes for the OS-independent
8142acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8143debug version of the code includes the debug output trace mechanism and
8144has a
8145much larger code and data size.
8146
8147  Previous Release:
8148    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
8149    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
8150  Current Release:
8151    Non-Debug Version:  82.8K Code, 17.5K Data, 100.3K Total
8152    Debug Version:     158.0K Code, 49.9K Data, 207.9K Total
8153
81542) iASL Compiler/Disassembler and Tools:
8155
8156iASL: Fixed a generation warning from Bison 2.3 and fixed several
8157warnings
8158on
8159the 64-bit build.
8160
8161iASL: Fixed a problem where the Unix/Linux versions of the compiler could
8162not
8163correctly digest Windows/DOS formatted files (with CR/LF).
8164
8165iASL: Added a new option for "quiet mode" (-va) that produces only the
8166compilation summary, not individual errors and warnings. Useful for large
8167batch compilations.
8168
8169AcpiExec: Implemented a new option (-z) to enable a forced
8170semaphore/mutex
8171timeout that can be used to detect hang conditions during execution of
8172AML
8173code (includes both internal semaphores and AML-defined mutexes and
8174events.)
8175
8176Added new makefiles for the generation of acpica in a generic unix-like
8177environment. These makefiles are intended to generate the acpica tools
8178and
8179utilities from the original acpica git source tree structure.
8180
8181Test Suites: Updated and cleaned up the documentation files. Updated the
8182copyrights to 2009, affecting all source files. Use the new version of
8183iASL
8184with quiet mode. Increased the number of available semaphores in the
8185Windows
8186OSL, allowing the aslts to execute fully on Windows. For the Unix OSL,
8187added
8188an alternate implementation of the semaphore timeout to allow aslts to
8189execute fully on Cygwin.
8190
8191----------------------------------------
819220 March 2009. Summary of changes for version 20090320:
8193
81941) ACPI CA Core Subsystem:
8195
8196Fixed a possible race condition between AcpiWalkNamespace and dynamic
8197table
8198unloads. Added a reader/writer locking mechanism to allow multiple
8199concurrent
8200namespace walks (readers), but block a dynamic table unload until it can
8201gain
8202exclusive write access to the namespace. This fixes a problem where a
8203table
8204unload could (possibly catastrophically) delete the portion of the
8205namespace
8206that is currently being examined by a walk. Adds a new file, utlock.c,
8207that
8208implements the reader/writer lock mechanism. ACPICA BZ 749.
8209
8210Fixed a regression introduced in version 20090220 where a change to the
8211FADT
8212handling could cause the ACPICA subsystem to access non-existent I/O
8213ports.
8214
8215Modified the handling of FADT register and table (FACS/DSDT) addresses.
8216The
8217FADT can contain both 32-bit and 64-bit versions of these addresses.
8218Previously, the 64-bit versions were favored, meaning that if both 32 and
821964
8220versions were valid, but not equal, the 64-bit version was used. This was
8221found to cause some machines to fail. Now, in this case, the 32-bit
8222version
8223is used instead. This now matches the Windows behavior.
8224
8225Implemented a new mechanism to protect certain I/O ports. Provides
8226Microsoft
8227compatibility and protects the standard PC I/O ports from access via AML
8228code. Adds a new file, hwvalid.c
8229
8230Fixed a possible extraneous warning message from the FADT support. The
8231message warns of a 32/64 length mismatch between the legacy and GAS
8232definitions for a register.
8233
8234Removed the obsolete AcpiOsValidateAddress OSL interface. This interface
8235is
8236made obsolete by the port protection mechanism above. It was previously
8237used
8238to validate the entire address range of an operation region, which could
8239be
8240incorrect if the range included illegal ports, but fields within the
8241operation region did not actually access those ports. Validation is now
8242performed on a per-field basis instead of the entire region.
8243
8244Modified the handling of the PM1 Status Register ignored bit (bit 11.)
8245Ignored bits must be "preserved" according to the ACPI spec. Usually,
8246this
8247means a read/modify/write when writing to the register. However, for
8248status
8249registers, writing a one means clear the event. Writing a zero means
8250preserve
8251the event (do not clear.) This behavior is clarified in the ACPI 4.0
8252spec,
8253and the ACPICA code now simply always writes a zero to the ignored bit.
8254
8255Modified the handling of ignored bits for the PM1 A/B Control Registers.
8256As
8257per the ACPI specification, for the control registers, preserve
8258(read/modify/write) all bits that are defined as either reserved or
8259ignored.
8260
8261Updated the handling of write-only bits in the PM1 A/B Control Registers.
8262When reading the register, zero the write-only bits as per the ACPI spec.
8263ACPICA BZ 443. Lin Ming.
8264
8265Removed "Linux" from the list of supported _OSI strings. Linux no longer
8266wants to reply true to this request. The Windows strings are the only
8267paths
8268through the AML that are tested and known to work properly.
8269
8270  Previous Release:
8271    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
8272    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
8273  Current Release:
8274    Non-Debug Version:  82.6K Code, 17.6K Data, 100.2K Total
8275    Debug Version:     157.7K Code, 49.9K Data, 207.6K Total
8276
82772) iASL Compiler/Disassembler and Tools:
8278
8279Acpiexec: Split the large aeexec.c file into two new files, aehandlers.c
8280and
8281aetables.c
8282
8283----------------------------------------
828420 February 2009. Summary of changes for version 20090220:
8285
82861) ACPI CA Core Subsystem:
8287
8288Optimized the ACPI register locking. Removed locking for reads from the
8289ACPI
8290bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock
8291is
8292not required when reading the single-bit registers. The
8293AcpiGetRegisterUnlocked function is no longer needed and has been
8294removed.
8295This will improve performance for reads on these registers. ACPICA BZ
8296760.
8297
8298Fixed the parameter validation for AcpiRead/Write. Now return
8299AE_BAD_PARAMETER if the input register pointer is null, and
8300AE_BAD_ADDRESS
8301if
8302the register has an address of zero. Previously, these cases simply
8303returned
8304AE_OK. For optional registers such as PM1B status/enable/control, the
8305caller
8306should check for a valid register address before calling. ACPICA BZ 748.
8307
8308Renamed the external ACPI bit register access functions. Renamed
8309AcpiGetRegister and AcpiSetRegister to clarify the purpose of these
8310functions. The new names are AcpiReadBitRegister and
8311AcpiWriteBitRegister.
8312Also, restructured the code for these functions by simplifying the code
8313path
8314and condensing duplicate code to reduce code size.
8315
8316Added new functions to transparently handle the possibly split PM1 A/B
8317registers. AcpiHwReadMultiple and AcpiHwWriteMultiple. These two
8318functions
8319now handle the split registers for PM1 Status, Enable, and Control.
8320ACPICA
8321BZ
8322746.
8323
8324Added a function to handle the PM1 control registers,
8325AcpiHwWritePm1Control.
8326This function writes both of the PM1 control registers (A/B). These
8327registers
8328are different than the PM1 A/B status and enable registers in that
8329different
8330values can be written to the A/B registers. Most notably, the SLP_TYP
8331bits
8332can be different, as per the values returned from the _Sx predefined
8333methods.
8334
8335Removed an extra register write within AcpiHwClearAcpiStatus. This
8336function
8337was writing an optional PM1B status register twice. The existing call to
8338the
8339low-level AcpiHwRegisterWrite automatically handles a possibly split PM1
8340A/B
8341register. ACPICA BZ 751.
8342
8343Split out the PM1 Status registers from the FADT. Added new globals for
8344these
8345registers (A/B), similar to the way the PM1 Enable registers are handled.
8346Instead of overloading the FADT Event Register blocks. This makes the
8347code
8348clearer and less prone to error.
8349
8350Fixed the warning message for when the platform contains too many ACPI
8351tables
8352for the default size of the global root table data structure. The
8353calculation
8354for the truncation value was incorrect.
8355
8356Removed the ACPI_GET_OBJECT_TYPE macro. Removed all instances of this
8357obsolete macro, since it is now a simple reference to ->common.type.
8358There
8359were about 150 invocations of the macro across 41 files. ACPICA BZ 755.
8360
8361Removed the redundant ACPI_BITREG_SLEEP_TYPE_B. This type is the same as
8362TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to
8363simply SLEEP_TYPE. ACPICA BZ 754.
8364
8365Conditionally compile the AcpiSetFirmwareWakingVector64 function. This
8366function is only needed on 64-bit host operating systems and is thus not
8367included for 32-bit hosts.
8368
8369Debug output: print the input and result for invocations of the _OSI
8370reserved
8371control method via the ACPI_LV_INFO debug level. Also, reduced some of
8372the
8373verbosity of this debug level. Len Brown.
8374
8375Example Code and Data Size: These are the sizes for the OS-independent
8376acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8377debug version of the code includes the debug output trace mechanism and
8378has a
8379much larger code and data size.
8380
8381  Previous Release:
8382    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
8383    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
8384  Current Release:
8385    Non-Debug Version:  82.0K Code, 17.5K Data,  99.5K Total
8386    Debug Version:     156.9K Code, 49.8K Data, 206.7K Total
8387
83882) iASL Compiler/Disassembler and Tools:
8389
8390Disassembler: Decode the FADT PM_Profile field. Emit ascii names for the
8391various legal performance profiles.
8392
8393----------------------------------------
839423 January 2009. Summary of changes for version 20090123:
8395
83961) ACPI CA Core Subsystem:
8397
8398Added the 2009 copyright to all module headers and signons. This affects
8399virtually every file in the ACPICA core subsystem, the iASL compiler, and
8400the tools/utilities.
8401
8402Implemented a change to allow the host to override any ACPI table,
8403including
8404dynamically loaded tables. Previously, only the DSDT could be replaced by
8405the
8406host. With this change, the AcpiOsTableOverride interface is called for
8407each
8408table found in the RSDT/XSDT during ACPICA initialization, and also
8409whenever
8410a table is dynamically loaded via the AML Load operator.
8411
8412Updated FADT flag definitions, especially the Boot Architecture flags.
8413
8414Debugger: For the Find command, automatically pad the input ACPI name
8415with
8416underscores if the name is shorter than 4 characters. This enables a
8417match
8418with the actual namespace entry which is itself padded with underscores.
8419
8420Example Code and Data Size: These are the sizes for the OS-independent
8421acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8422debug version of the code includes the debug output trace mechanism and
8423has a
8424much larger code and data size.
8425
8426  Previous Release:
8427    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
8428    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
8429  Current Release:
8430    Non-Debug Version:  82.3K Code, 17.5K Data,  99.8K Total
8431    Debug Version:     157.3K Code, 49.8K Data, 207.1K Total
8432
84332) iASL Compiler/Disassembler and Tools:
8434
8435Fix build error under Bison-2.4.
8436
8437Dissasembler: Enhanced FADT support. Added decoding of the Boot
8438Architecture
8439flags. Now decode all flags, regardless of the FADT version. Flag output
8440includes the FADT version which first defined each flag.
8441
8442The iASL -g option now dumps the RSDT to a file (in addition to the FADT
8443and
8444DSDT). Windows only.
8445
8446----------------------------------------
844704 December 2008. Summary of changes for version 20081204:
8448
84491) ACPI CA Core Subsystem:
8450
8451The ACPICA Programmer Reference has been completely updated and revamped
8452for
8453this release. This includes updates to the external interfaces, OSL
8454interfaces, the overview sections, and the debugger reference.
8455
8456Several new ACPICA interfaces have been implemented and documented in the
8457programmer reference:
8458AcpiReset - Writes the reset value to the FADT-defined reset register.
8459AcpiDisableAllGpes - Disable all available GPEs.
8460AcpiEnableAllRuntimeGpes - Enable all available runtime GPEs.
8461AcpiGetGpeDevice - Get the GPE block device associated with a GPE.
8462AcpiGbl_CurrentGpeCount - Tracks the current number of available GPEs.
8463AcpiRead - Low-level read ACPI register (was HwLowLevelRead.)
8464AcpiWrite - Low-level write ACPI register (was HwLowLevelWrite.)
8465
8466Most of the public ACPI hardware-related interfaces have been moved to a
8467new
8468file, components/hardware/hwxface.c
8469
8470Enhanced the FADT parsing and low-level ACPI register access: The ACPI
8471register lengths within the FADT are now used, and the low level ACPI
8472register access no longer hardcodes the ACPI register lengths. Given that
8473there may be some risk in actually trusting the FADT register lengths, a
8474run-
8475time option was added to fall back to the default hardcoded lengths if
8476the
8477FADT proves to contain incorrect values - UseDefaultRegisterWidths. This
8478option is set to true for now, and a warning is issued if a suspicious
8479FADT
8480register length is overridden with the default value.
8481
8482Fixed a reference count issue in NsRepairObject. This problem was
8483introduced
8484in version 20081031 as part of a fix to repair Buffer objects within
8485Packages. Lin Ming.
8486
8487Added semaphore support to the Linux/Unix application OS-services layer
8488(OSL). ACPICA BZ 448. Lin Ming.
8489
8490Added the ACPI_MUTEX_TYPE configuration option to select whether mutexes
8491will
8492be implemented in the OSL, or will binary semaphores be used instead.
8493
8494Example Code and Data Size: These are the sizes for the OS-independent
8495acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8496debug version of the code includes the debug output trace mechanism and
8497has a
8498much larger code and data size.
8499
8500  Previous Release:
8501    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
8502    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
8503  Current Release:
8504    Non-Debug Version:  82.3K Code, 17.4K Data,  99.7K Total
8505    Debug Version:     157.1K Code, 49.7K Data, 206.8K Total
8506
85072) iASL Compiler/Disassembler and Tools:
8508
8509iASL: Completed the '-e' option to include additional ACPI tables in
8510order
8511to
8512aid with disassembly and External statement generation. ACPICA BZ 742.
8513Lin
8514Ming.
8515
8516iASL: Removed the "named object in while loop" error. The compiler cannot
8517determine how many times a loop will execute. ACPICA BZ 730.
8518
8519Disassembler: Implemented support for FADT revision 2 (MS extension).
8520ACPICA
8521BZ 743.
8522
8523Disassembler: Updates for several ACPI data tables (HEST, EINJ, and
8524MCFG).
8525
8526----------------------------------------
852731 October 2008. Summary of changes for version 20081031:
8528
85291) ACPI CA Core Subsystem:
8530
8531Restructured the ACPICA header files into public/private. acpi.h now
8532includes
8533only the "public" acpica headers. All other acpica headers are "private"
8534and
8535should not be included by acpica users. One new file, accommon.h is used
8536to
8537include the commonly used private headers for acpica code generation.
8538Future
8539plans include moving all private headers to a new subdirectory.
8540
8541Implemented an automatic Buffer->String return value conversion for
8542predefined ACPI methods. For these methods (such as _BIF), added
8543automatic
8544conversion for return objects that are required to be a String, but a
8545Buffer
8546was found instead. This can happen when reading string battery data from
8547an
8548operation region, because it used to be difficult to convert the data
8549from
8550buffer to string from within the ASL. Ensures that the host OS is
8551provided
8552with a valid null-terminated string. Linux BZ 11822.
8553
8554Updated the FACS waking vector interfaces. Split
8555AcpiSetFirmwareWakingVector
8556into two: one for the 32-bit vector, another for the 64-bit vector. This
8557is
8558required because the host OS must setup the wake much differently for
8559each
8560vector (real vs. protected mode, etc.) and the interface itself should
8561not
8562be
8563deciding which vector to use. Also, eliminated the
8564GetFirmwareWakingVector
8565interface, as it served no purpose (only the firmware reads the vector,
8566OS
8567only writes the vector.) ACPICA BZ 731.
8568
8569Implemented a mechanism to escape infinite AML While() loops. Added a
8570loop
8571counter to force exit from AML While loops if the count becomes too
8572large.
8573This can occur in poorly written AML when the hardware does not respond
8574within a while loop and the loop does not implement a timeout. The
8575maximum
8576loop count is configurable. A new exception code is returned when a loop
8577is
8578broken, AE_AML_INFINITE_LOOP. Alexey Starikovskiy, Bob Moore.
8579
8580Optimized the execution of AML While loops. Previously, a control state
8581object was allocated and freed for each execution of the loop. The
8582optimization is to simply reuse the control state for each iteration.
8583This
8584speeds up the raw loop execution time by about 5%.
8585
8586Enhanced the implicit return mechanism. For Windows compatibility, return
8587an
8588implicit integer of value zero for methods that contain no executable
8589code.
8590Such methods are seen in the field as stubs (presumably), and can cause
8591drivers to fail if they expect a return value. Lin Ming.
8592
8593Allow multiple backslashes as root prefixes in namepaths. In a fully
8594qualified namepath, allow multiple backslash prefixes. This can happen
8595(and
8596is seen in the field) because of the use of a double-backslash in strings
8597(since backslash is the escape character) causing confusion. ACPICA BZ
8598739
8599Lin Ming.
8600
8601Emit a warning if two different FACS or DSDT tables are discovered in the
8602FADT. Checks if there are two valid but different addresses for the FACS
8603and
8604DSDT within the FADT (mismatch between the 32-bit and 64-bit fields.)
8605
8606Consolidated the method argument count validation code. Merged the code
8607that
8608validates control method argument counts into the predefined validation
8609module. Eliminates possible multiple warnings for incorrect argument
8610counts.
8611
8612Implemented ACPICA example code. Includes code for ACPICA initialization,
8613handler installation, and calling a control method. Available at
8614source/tools/examples.
8615
8616Added a global pointer for FACS table to simplify internal FACS access.
8617Use
8618the global pointer instead of using AcpiGetTableByIndex for each FACS
8619access.
8620This simplifies the code for the Global Lock and the Firmware Waking
8621Vector(s).
8622
8623Example Code and Data Size: These are the sizes for the OS-independent
8624acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8625debug version of the code includes the debug output trace mechanism and
8626has a
8627much larger code and data size.
8628
8629  Previous Release:
8630    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
8631    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
8632  Current Release:
8633    Non-Debug Version:  81.7K Code, 17.3K Data,  99.0K Total
8634    Debug Version:     156.4K Code, 49.4K Data, 205.8K Total
8635
86362) iASL Compiler/Disassembler and Tools:
8637
8638iASL: Improved disassembly of external method calls. Added the -e option
8639to
8640allow the inclusion of additional ACPI tables to help with the
8641disassembly
8642of
8643method invocations and the generation of external declarations during the
8644disassembly. Certain external method invocations cannot be disassembled
8645properly without the actual declaration of the method. Use the -e option
8646to
8647include the table where the external method(s) are actually declared.
8648Most
8649useful for disassembling SSDTs that make method calls back to the master
8650DSDT. Lin Ming. Example: To disassemble an SSDT with calls to DSDT:  iasl
8651-d
8652-e dsdt.aml ssdt1.aml
8653
8654iASL: Fix to allow references to aliases within ASL namepaths. Fixes a
8655problem where the use of an alias within a namepath would result in a not
8656found error or cause the compiler to fault. Also now allows forward
8657references from the Alias operator itself. ACPICA BZ 738.
8658
8659----------------------------------------
866026 September 2008. Summary of changes for version 20080926:
8661
86621) ACPI CA Core Subsystem:
8663
8664Designed and implemented a mechanism to validate predefined ACPI methods
8665and
8666objects. This code validates the predefined ACPI objects (objects whose
8667names
8668start with underscore) that appear in the namespace, at the time they are
8669evaluated. The argument count and the type of the returned object are
8670validated against the ACPI specification. The purpose of this validation
8671is
8672to detect problems with the BIOS-implemented predefined ACPI objects
8673before
8674the results are returned to the ACPI-related drivers. Future enhancements
8675may
8676include actual repair of incorrect return objects where possible. Two new
8677files are nspredef.c and acpredef.h.
8678
8679Fixed a fault in the AML parser if a memory allocation fails during the
8680Op
8681completion routine AcpiPsCompleteThisOp. Lin Ming. ACPICA BZ 492.
8682
8683Fixed an issue with implicit return compatibility. This change improves
8684the
8685implicit return mechanism to be more compatible with the MS interpreter.
8686Lin
8687Ming, ACPICA BZ 349.
8688
8689Implemented support for zero-length buffer-to-string conversions. Allow
8690zero
8691length strings during interpreter buffer-to-string conversions. For
8692example,
8693during the ToDecimalString and ToHexString operators, as well as implicit
8694conversions. Fiodor Suietov, ACPICA BZ 585.
8695
8696Fixed two possible memory leaks in the error exit paths of
8697AcpiUtUpdateObjectReference and AcpiUtWalkPackageTree. These functions
8698are
8699similar in that they use a stack of state objects in order to eliminate
8700recursion. The stack must be fully unwound and deallocated if an error
8701occurs. Lin Ming. ACPICA BZ 383.
8702
8703Removed the unused ACPI_BITREG_WAKE_ENABLE definition and entry in the
8704global
8705ACPI register table. This bit does not exist and is unused. Lin Ming, Bob
8706Moore ACPICA BZ 442.
8707
8708Removed the obsolete version number in module headers. Removed the
8709"$Revision" number that appeared in each module header. This version
8710number
8711was useful under SourceSafe and CVS, but has no meaning under git. It is
8712not
8713only incorrect, it could also be misleading.
8714
8715Example Code and Data Size: These are the sizes for the OS-independent
8716acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8717debug version of the code includes the debug output trace mechanism and
8718has a
8719much larger code and data size.
8720
8721  Previous Release:
8722    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
8723    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
8724  Current Release:
8725    Non-Debug Version:  81.2K Code, 17.0K Data,  98.2K Total
8726    Debug Version:     155.8K Code, 49.1K Data, 204.9K Total
8727
8728----------------------------------------
872929 August 2008. Summary of changes for version 20080829:
8730
87311) ACPI CA Core Subsystem:
8732
8733Completed a major cleanup of the internal ACPI_OPERAND_OBJECT of type
8734Reference. Changes include the elimination of cheating on the Object
8735field
8736for the DdbHandle subtype, addition of a reference class field to
8737differentiate the various reference types (instead of an AML opcode), and
8738the
8739cleanup of debug output for this object. Lin Ming, Bob Moore. BZ 723
8740
8741Reduce an error to a warning for an incorrect method argument count.
8742Previously aborted with an error if too few arguments were passed to a
8743control method via the external ACPICA interface. Now issue a warning
8744instead
8745and continue. Handles the case where the method inadvertently declares
8746too
8747many arguments, but does not actually use the extra ones. Applies mainly
8748to
8749the predefined methods. Lin Ming. Linux BZ 11032.
8750
8751Disallow the evaluation of named object types with no intrinsic value.
8752Return
8753AE_TYPE for objects that have no value and therefore evaluation is
8754undefined:
8755Device, Event, Mutex, Region, Thermal, and Scope. Previously, evaluation
8756of
8757these types were allowed, but an exception would be generated at some
8758point
8759during the evaluation. Now, the error is generated up front.
8760
8761Fixed a possible memory leak in the AcpiNsGetExternalPathname function
8762(nsnames.c). Fixes a leak in the error exit path.
8763
8764Removed the obsolete debug levels ACPI_DB_WARN and ACPI_DB_ERROR. These
8765debug
8766levels were made obsolete by the ACPI_WARNING, ACPI_ERROR, and
8767ACPI_EXCEPTION
8768interfaces. Also added ACPI_DB_EVENTS to correspond with the existing
8769ACPI_LV_EVENTS.
8770
8771Removed obsolete and/or unused exception codes from the acexcep.h header.
8772There is the possibility that certain device drivers may be affected if
8773they
8774use any of these exceptions.
8775
8776The ACPICA documentation has been added to the public git source tree,
8777under
8778acpica/documents. Included are the ACPICA programmer reference, the iASL
8779compiler reference, and the changes.txt release logfile.
8780
8781Example Code and Data Size: These are the sizes for the OS-independent
8782acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8783debug version of the code includes the debug output trace mechanism and
8784has a
8785much larger code and data size.
8786
8787  Previous Release:
8788    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
8789    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
8790  Current Release:
8791    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
8792    Debug Version:     153.7K Code, 48.2K Data, 201.9K Total
8793
87942) iASL Compiler/Disassembler and Tools:
8795
8796Allow multiple argument counts for the predefined _SCP method. ACPI 3.0
8797defines _SCP with 3 arguments. Previous versions defined it with only 1
8798argument. iASL now allows both definitions.
8799
8800iASL/disassembler: avoid infinite loop on bad ACPI tables. Check for
8801zero-
8802length subtables when disassembling ACPI tables. Also fixed a couple of
8803errors where a full 16-bit table type field was not extracted from the
8804input
8805properly.
8806
8807acpisrc: Improve comment counting mechanism for generating source code
8808statistics. Count first and last lines of multi-line comments as
8809whitespace,
8810not comment lines. Handle Linux legal header in addition to standard
8811acpica
8812header.
8813
8814----------------------------------------
8815
881629 July 2008. Summary of changes for version 20080729:
8817
88181) ACPI CA Core Subsystem:
8819
8820Fix a possible deadlock in the GPE dispatch. Remove call to
8821AcpiHwDisableAllGpes during wake in AcpiEvGpeDispatch. This call will
8822attempt
8823to acquire the GPE lock but can deadlock since the GPE lock is already
8824held
8825at dispatch time. This code was introduced in version 20060831 as a
8826response
8827to Linux BZ 6881 and has since been removed from Linux.
8828
8829Add a function to dereference returned reference objects. Examines the
8830return
8831object from a call to AcpiEvaluateObject. Any Index or RefOf references
8832are
8833automatically dereferenced in an attempt to return something useful
8834(these
8835reference types cannot be converted into an external ACPI_OBJECT.)
8836Provides
8837MS compatibility. Lin Ming, Bob Moore. Linux BZ 11105
8838
8839x2APIC support: changes for MADT and SRAT ACPI tables. There are 2 new
8840subtables for the MADT and one new subtable for the SRAT. Includes
8841disassembler and AcpiSrc support. Data from the Intel 64 Architecture
8842x2APIC
8843Specification, June 2008.
8844
8845Additional error checking for pathname utilities. Add error check after
8846all
8847calls to AcpiNsGetPathnameLength. Add status return from
8848AcpiNsBuildExternalPath and check after all calls. Add parameter
8849validation
8850to AcpiUtInitializeBuffer. Reported by and initial patch by Ingo Molnar.
8851
8852Return status from the global init function AcpiUtGlobalInitialize. This
8853is
8854used by both the kernel subsystem and the utilities such as iASL
8855compiler.
8856The function could possibly fail when the caches are initialized. Yang
8857Yi.
8858
8859Add a function to decode reference object types to strings. Created for
8860improved error messages.
8861
8862Improve object conversion error messages. Better error messages during
8863object
8864conversion from internal to the external ACPI_OBJECT. Used for external
8865calls
8866to AcpiEvaluateObject.
8867
8868Example Code and Data Size: These are the sizes for the OS-independent
8869acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
8870debug version of the code includes the debug output trace mechanism and
8871has a
8872much larger code and data size.
8873
8874  Previous Release:
8875    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
8876    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
8877  Current Release:
8878    Non-Debug Version:  79.7K Code, 16.4K Data,  96.1K Total
8879    Debug Version:     153.9K Code, 48.4K Data, 202.3K Total
8880
88812) iASL Compiler/Disassembler and Tools:
8882
8883Debugger: fix a possible hang when evaluating non-methods. Fixes a
8884problem
8885introduced in version 20080701. If the object being evaluated (via
8886execute
8887command) is not a method, the debugger can hang while trying to obtain
8888non-
8889existent parameters.
8890
8891iASL: relax error for using reserved "_T_x" identifiers. These names can
8892appear in a disassembled ASL file if they were emitted by the original
8893compiler. Instead of issuing an error or warning and forcing the user to
8894manually change these names, issue a remark instead.
8895
8896iASL: error if named object created in while loop. Emit an error if any
8897named
8898object is created within a While loop. If allowed, this code will
8899generate
8900a
8901run-time error on the second iteration of the loop when an attempt is
8902made
8903to
8904create the same named object twice. ACPICA bugzilla 730.
8905
8906iASL: Support absolute pathnames for include files. Add support for
8907absolute
8908pathnames within the Include operator. previously, only relative
8909pathnames
8910were supported.
8911
8912iASL: Enforce minimum 1 interrupt in interrupt macro and Resource
8913Descriptor.
8914The ACPI spec requires one interrupt minimum. BZ 423
8915
8916iASL: Handle a missing ResourceSource arg, with a present SourceIndex.
8917Handles the case for the Interrupt Resource Descriptor where
8918the ResourceSource argument is omitted but ResourceSourceIndex
8919is present. Now leave room for the Index. BZ 426
8920
8921iASL: Prevent error message if CondRefOf target does not exist. Fixes
8922cases
8923where an error message is emitted if the target does not exist. BZ 516
8924
8925iASL: Fix broken -g option (get Windows ACPI tables). Fixes the -g option
8926(get ACPI tables on Windows). This was apparently broken in version
892720070919.
8928
8929AcpiXtract: Handle EOF while extracting data. Correctly handle the case
8930where
8931the EOF happens immediately after the last table in the input file. Print
8932completion message. Previously, no message was displayed in this case.
8933
8934----------------------------------------
893501 July 2008. Summary of changes for version 20080701:
8936
89370) Git source tree / acpica.org
8938
8939Fixed a problem where a git-clone from http would not transfer the entire
8940source tree.
8941
89421) ACPI CA Core Subsystem:
8943
8944Implemented a "careful" GPE disable in AcpiEvDisableGpe, only modify one
8945enable bit. Now performs a read-change-write of the enable register
8946instead
8947of simply writing out the cached enable mask. This will prevent
8948inadvertent
8949enabling of GPEs if a rogue GPE is received during initialization (before
8950GPE
8951handlers are installed.)
8952
8953Implemented a copy for dynamically loaded tables. Previously, dynamically
8954loaded tables were simply mapped - but on some machines this memory is
8955corrupted after suspend. Now copy the table to a local buffer. For the
8956OpRegion case, added checksum verify. Use the table length from the table
8957header, not the region length. For the Buffer case, use the table length
8958also. Dennis Noordsij, Bob Moore. BZ 10734
8959
8960Fixed a problem where the same ACPI table could not be dynamically loaded
8961and
8962unloaded more than once. Without this change, a table cannot be loaded
8963again
8964once it has been loaded/unloaded one time. The current mechanism does not
8965unregister a table upon an unload. During a load, if the same table is
8966found,
8967this no longer returns an exception. BZ 722
8968
8969Fixed a problem where the wrong descriptor length was calculated for the
8970EndTag descriptor in 64-bit mode. The "minimal" descriptors such as
8971EndTag
8972are calculated as 12 bytes long, but the actual length in the internal
8973descriptor is 16 because of the round-up to 8 on the 64-bit build.
8974Reported
8975by Linn Crosetto. BZ 728
8976
8977Fixed a possible memory leak in the Unload operator. The DdbHandle
8978returned
8979by Load() did not have its reference count decremented during unload,
8980leading
8981to a memory leak. Lin Ming. BZ 727
8982
8983Fixed a possible memory leak when deleting thermal/processor objects. Any
8984associated notify handlers (and objects) were not being deleted. Fiodor
8985Suietov. BZ 506
8986
8987Fixed the ordering of the ASCII names in the global mutex table to match
8988the
8989actual mutex IDs. Used by AcpiUtGetMutexName, a function used for debug
8990only.
8991Vegard Nossum. BZ 726
8992
8993Enhanced the AcpiGetObjectInfo interface to return the number of required
8994arguments if the object is a control method. Added this call to the
8995debugger
8996so the proper number of default arguments are passed to a method. This
8997prevents a warning when executing methods from AcpiExec.
8998
8999Added a check for an invalid handle in AcpiGetObjectInfo. Return
9000AE_BAD_PARAMETER if input handle is invalid. BZ 474
9001
9002Fixed an extraneous warning from exconfig.c on the 64-bit build.
9003
9004Example Code and Data Size: These are the sizes for the OS-independent
9005acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9006debug version of the code includes the debug output trace mechanism and
9007has a
9008much larger code and data size.
9009
9010  Previous Release:
9011    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
9012    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
9013  Current Release:
9014    Non-Debug Version:  79.6K Code, 16.2K Data,  95.8K Total
9015    Debug Version:     153.5K Code, 48.2K Data, 201.7K Total
9016
90172) iASL Compiler/Disassembler and Tools:
9018
9019iASL: Added two missing ACPI reserved names. Added _MTP and _ASZ, both
9020resource descriptor names.
9021
9022iASL: Detect invalid ASCII characters in input (windows version). Removed
9023the
9024"-CF" flag from the flex compile, enables correct detection of non-ASCII
9025characters in the input. BZ 441
9026
9027iASL: Eliminate warning when result of LoadTable is not used. Eliminate
9028the
9029"result of operation not used" warning when the DDB handle returned from
9030LoadTable is not used. The warning is not needed. BZ 590
9031
9032AcpiExec: Add support for dynamic table load/unload. Now calls _CFG
9033method
9034to
9035pass address of table to the AML. Added option to disable OpRegion
9036simulation
9037to allow creation of an OpRegion with a real address that was passed to
9038_CFG.
9039All of this allows testing of the Load and Unload operators from
9040AcpiExec.
9041
9042Debugger: update tables command for unloaded tables. Handle unloaded
9043tables
9044and use the standard table header output routine.
9045
9046----------------------------------------
904709 June 2008. Summary of changes for version 20080609:
9048
90491) ACPI CA Core Subsystem:
9050
9051Implemented a workaround for reversed _PRT entries. A significant number
9052of
9053BIOSs erroneously reverse the _PRT SourceName and the SourceIndex. This
9054change dynamically detects and repairs this problem. Provides
9055compatibility
9056with MS ACPI. BZ 6859
9057
9058Simplified the internal ACPI hardware interfaces to eliminate the locking
9059flag parameter from Register Read/Write. Added a new external interface,
9060AcpiGetRegisterUnlocked.
9061
9062Fixed a problem where the invocation of a GPE control method could hang.
9063This
9064was a regression introduced in 20080514. The new method argument count
9065validation mechanism can enter an infinite loop when a GPE method is
9066dispatched. Problem fixed by removing the obsolete code that passed GPE
9067block
9068information to the notify handler via the control method parameter
9069pointer.
9070
9071Fixed a problem where the _SST execution status was incorrectly returned
9072to
9073the caller of AcpiEnterSleepStatePrep. This was a regression introduced
9074in
907520080514. _SST is optional and a NOT_FOUND exception should never be
9076returned. BZ 716
9077
9078Fixed a problem where a deleted object could be accessed from within the
9079AML
9080parser. This was a regression introduced in version 20080123 as a fix for
9081the
9082Unload operator. Lin Ming. BZ 10669
9083
9084Cleaned up the debug operand dump mechanism. Eliminated unnecessary
9085operands
9086and eliminated the use of a negative index in a loop. Operands are now
9087displayed in the correct order, not backwards. This also fixes a
9088regression
9089introduced in 20080514 on 64-bit systems where the elimination of
9090ACPI_NATIVE_UINT caused the negative index to go large and positive. BZ
9091715
9092
9093Fixed a possible memory leak in EvPciConfigRegionSetup where the error
9094exit
9095path did not delete a locally allocated structure.
9096
9097Updated definitions for the DMAR and SRAT tables to synchronize with the
9098current specifications. Includes disassembler support.
9099
9100Fixed a problem in the mutex debug code (in utmutex.c) where an incorrect
9101loop termination value was used. Loop terminated on iteration early,
9102missing
9103one mutex. Linn Crosetto
9104
9105Example Code and Data Size: These are the sizes for the OS-independent
9106acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9107debug version of the code includes the debug output trace mechanism and
9108has a
9109much larger code and data size.
9110
9111  Previous Release:
9112    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
9113    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
9114  Current Release:
9115    Non-Debug Version:  79.3K Code, 16.2K Data,  95.5K Total
9116    Debug Version:     153.0K Code, 48.2K Data, 201.2K Total
9117
91182) iASL Compiler/Disassembler and Tools:
9119
9120Disassembler: Implemented support for EisaId() within _CID objects. Now
9121disassemble integer _CID objects back to EisaId invocations, including
9122multiple integers within _CID packages. Includes single-step support for
9123debugger also.
9124
9125Disassembler: Added support for DMAR and SRAT table definition changes.
9126
9127----------------------------------------
912814 May 2008. Summary of changes for version 20080514:
9129
91301) ACPI CA Core Subsystem:
9131
9132Fixed a problem where GPEs were enabled too early during the ACPICA
9133initialization. This could lead to "handler not installed" errors on some
9134machines. Moved GPE enable until after _REG/_STA/_INI methods are run.
9135This
9136ensures that all operation regions and devices throughout the namespace
9137have
9138been initialized before GPEs are enabled. Alexey Starikovskiy, BZ 9916.
9139
9140Implemented a change to the enter sleep code. Moved execution of the _GTS
9141method to just before setting sleep enable bit. The execution was moved
9142from
9143AcpiEnterSleepStatePrep to AcpiEnterSleepState. _GTS is now executed
9144immediately before the SLP_EN bit is set, as per the ACPI specification.
9145Luming Yu, BZ 1653.
9146
9147Implemented a fix to disable unknown GPEs (2nd version). Now always
9148disable
9149the GPE, even if ACPICA thinks that that it is already disabled. It is
9150possible that the AML or some other code has enabled the GPE unbeknownst
9151to
9152the ACPICA code.
9153
9154Fixed a problem with the Field operator where zero-length fields would
9155return
9156an AE_AML_NO_OPERAND exception during table load. Fix enables zero-length
9157ASL
9158field declarations in Field(), BankField(), and IndexField(). BZ 10606.
9159
9160Implemented a fix for the Load operator, now load the table at the
9161namespace
9162root. This reverts a change introduced in version 20071019. The table is
9163now
9164loaded at the namespace root even though this goes against the ACPI
9165specification. This provides compatibility with other ACPI
9166implementations.
9167The ACPI specification will be updated to reflect this in ACPI 4.0. Lin
9168Ming.
9169
9170Fixed a problem where ACPICA would not Load() tables with unusual
9171signatures.
9172Now ignore ACPI table signature for Load() operator. Only "SSDT" is
9173acceptable to the ACPI spec, but tables are seen with OEMx and null sigs.
9174Therefore, signature validation is worthless. Apparently MS ACPI accepts
9175such
9176signatures, ACPICA must be compatible. BZ 10454.
9177
9178Fixed a possible negative array index in AcpiUtValidateException. Added
9179NULL
9180fields to the exception string arrays to eliminate a -1 subtraction on
9181the
9182SubStatus field.
9183
9184Updated the debug tracking macros to reduce overall code and data size.
9185Changed ACPI_MODULE_NAME and ACPI_FUNCTION_NAME to use arrays of strings
9186instead of pointers to static strings. Jan Beulich and Bob Moore.
9187
9188Implemented argument count checking in control method invocation via
9189AcpiEvaluateObject. Now emit an error if too few arguments, warning if
9190too
9191many. This applies only to extern programmatic control method execution,
9192not
9193method-to-method calls within the AML. Lin Ming.
9194
9195Eliminated the ACPI_NATIVE_UINT type across all ACPICA code. This type is
9196no
9197longer needed, especially with the removal of 16-bit support. It was
9198replaced
9199mostly with UINT32, but also ACPI_SIZE where a type that changes 32/64
9200bit
9201on
920232/64-bit platforms is required.
9203
9204Added the C const qualifier for appropriate string constants -- mostly
9205MODULE_NAME and printf format strings. Jan Beulich.
9206
9207Example Code and Data Size: These are the sizes for the OS-independent
9208acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9209debug version of the code includes the debug output trace mechanism and
9210has a
9211much larger code and data size.
9212
9213  Previous Release:
9214    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
9215    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
9216  Current Release:
9217    Non-Debug Version:  79.5K Code, 16.2K Data,  95.7K Total
9218    Debug Version:     153.3K Code, 48.3K Data, 201.6K Total
9219
92202) iASL Compiler/Disassembler and Tools:
9221
9222Implemented ACPI table revision ID validation in the disassembler. Zero
9223is
9224always invalid. For DSDTs, the ID controls the interpreter integer width.
92251
9226means 32-bit and this is unusual. 2 or greater is 64-bit.
9227
9228----------------------------------------
922921 March 2008. Summary of changes for version 20080321:
9230
92311) ACPI CA Core Subsystem:
9232
9233Implemented an additional change to the GPE support in order to suppress
9234spurious or stray GPEs. The AcpiEvDisableGpe function will now
9235permanently
9236disable incoming GPEs that are neither enabled nor disabled -- meaning
9237that
9238the GPE is unknown to the system. This should prevent future interrupt
9239floods
9240from that GPE. BZ 6217 (Zhang Rui)
9241
9242Fixed a problem where NULL package elements were not returned to the
9243AcpiEvaluateObject interface correctly. The element was simply ignored
9244instead of returning a NULL ACPI_OBJECT package element, potentially
9245causing
9246a buffer overflow and/or confusing the caller who expected a fixed number
9247of
9248elements. BZ 10132 (Lin Ming, Bob Moore)
9249
9250Fixed a problem with the CreateField, CreateXXXField (Bit, Byte, Word,
9251Dword,
9252Qword), Field, BankField, and IndexField operators when invoked from
9253inside
9254an executing control method. In this case, these operators created
9255namespace
9256nodes that were incorrectly left marked as permanent nodes instead of
9257temporary nodes. This could cause a problem if there is race condition
9258between an exiting control method and a running namespace walk. (Reported
9259by
9260Linn Crosetto)
9261
9262Fixed a problem where the CreateField and CreateXXXField operators would
9263incorrectly allow duplicate names (the name of the field) with no
9264exception
9265generated.
9266
9267Implemented several changes for Notify handling. Added support for new
9268Notify
9269values (ACPI 2.0+) and improved the Notify debug output. Notify on
9270PowerResource objects is no longer allowed, as per the ACPI
9271specification.
9272(Bob Moore, Zhang Rui)
9273
9274All Reference Objects returned via the AcpiEvaluateObject interface are
9275now
9276marked as type "REFERENCE" instead of "ANY". The type ANY is now reserved
9277for
9278NULL objects - either NULL package elements or unresolved named
9279references.
9280
9281Fixed a problem where an extraneous debug message was produced for
9282package
9283objects (when debugging enabled). The message "Package List length larger
9284than NumElements count" is now produced in the correct case, and is now
9285an
9286error message rather than a debug message. Added a debug message for the
9287opposite case, where NumElements is larger than the Package List (the
9288package
9289will be padded out with NULL elements as per the ACPI spec.)
9290
9291Implemented several improvements for the output of the ASL "Debug" object
9292to
9293clarify and keep all data for a given object on one output line.
9294
9295Fixed two size calculation issues with the variable-length Start
9296Dependent
9297resource descriptor.
9298
9299Example Code and Data Size: These are the sizes for the OS-independent
9300acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9301debug version of the code includes the debug output trace mechanism and
9302has
9303a much larger code and data size.
9304
9305  Previous Release:
9306    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
9307    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
9308  Current Release:
9309    Non-Debug Version:  80.0K Code, 17.4K Data,  97.4K Total
9310    Debug Version:     159.4K Code, 64.4K Data, 223.8K Total
9311
93122) iASL Compiler/Disassembler and Tools:
9313
9314Fixed a problem with the use of the Switch operator where execution of
9315the
9316containing method by multiple concurrent threads could cause an
9317AE_ALREADY_EXISTS exception. This is caused by the fact that there is no
9318actual Switch opcode, it must be simulated with local named temporary
9319variables and if/else pairs. The solution chosen was to mark any method
9320that
9321uses Switch as Serialized, thus preventing multiple thread entries. BZ
9322469.
9323
9324----------------------------------------
932513 February 2008. Summary of changes for version 20080213:
9326
93271) ACPI CA Core Subsystem:
9328
9329Implemented another MS compatibility design change for GPE/Notify
9330handling.
9331GPEs are now cleared/enabled asynchronously to allow all pending notifies
9332to
9333complete first. It is expected that the OSL will queue the enable request
9334behind all pending notify requests (may require changes to the local host
9335OSL
9336in AcpiOsExecute). Alexey Starikovskiy.
9337
9338Fixed a problem where buffer and package objects passed as arguments to a
9339control method via the external AcpiEvaluateObject interface could cause
9340an
9341AE_AML_INTERNAL exception depending on the order and type of operators
9342executed by the target control method.
9343
9344Fixed a problem where resource descriptor size optimization could cause a
9345problem when a _CRS resource template is passed to a _SRS method. The
9346_SRS
9347resource template must use the same descriptors (with the same size) as
9348returned from _CRS. This change affects the following resource
9349descriptors:
9350IRQ / IRQNoFlags and StartDependendentFn / StartDependentFnNoPri. (BZ
93519487)
9352
9353Fixed a problem where a CopyObject to RegionField, BankField, and
9354IndexField
9355objects did not perform an implicit conversion as it should. These types
9356must
9357retain their initial type permanently as per the ACPI specification.
9358However,
9359a CopyObject to all other object types should not perform an implicit
9360conversion, as per the ACPI specification. (Lin Ming, Bob Moore) BZ 388
9361
9362Fixed a problem with the AcpiGetDevices interface where the mechanism to
9363match device CIDs did not examine the entire list of available CIDs, but
9364instead aborted on the first non-matching CID. Andrew Patterson.
9365
9366Fixed a regression introduced in version 20071114. The ACPI_HIDWORD macro
9367was
9368inadvertently changed to return a 16-bit value instead of a 32-bit value,
9369truncating the upper dword of a 64-bit value. This macro is only used to
9370display debug output, so no incorrect calculations were made. Also,
9371reimplemented the macro so that a 64-bit shift is not performed by
9372inefficient compilers.
9373
9374Added missing va_end statements that should correspond with each va_start
9375statement.
9376
9377Example Code and Data Size: These are the sizes for the OS-independent
9378acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9379debug version of the code includes the debug output trace mechanism and
9380has
9381a much larger code and data size.
9382
9383  Previous Release:
9384    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
9385    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
9386  Current Release:
9387    Non-Debug Version:  79.7K Code, 17.3K Data,  97.0K Total
9388    Debug Version:     158.9K Code, 64.0K Data, 222.9K Total
9389
93902) iASL Compiler/Disassembler and Tools:
9391
9392Implemented full disassembler support for the following new ACPI tables:
9393BERT, EINJ, and ERST. Implemented partial disassembler support for the
9394complicated HEST table. These tables support the Windows Hardware Error
9395Architecture (WHEA).
9396
9397----------------------------------------
939823 January 2008. Summary of changes for version 20080123:
9399
94001) ACPI CA Core Subsystem:
9401
9402Added the 2008 copyright to all module headers and signons. This affects
9403virtually every file in the ACPICA core subsystem, the iASL compiler, and
9404the tools/utilities.
9405
9406Fixed a problem with the SizeOf operator when used with Package and
9407Buffer
9408objects. These objects have deferred execution for some arguments, and
9409the
9410execution is now completed before the SizeOf is executed. This problem
9411caused
9412unexpected AE_PACKAGE_LIMIT errors on some systems (Lin Ming, Bob Moore)
9413BZ
94149558
9415
9416Implemented an enhancement to the interpreter "slack mode". In the
9417absence
9418of
9419an explicit return or an implicitly returned object from the last
9420executed
9421opcode, a control method will now implicitly return an integer of value 0
9422for
9423Microsoft compatibility. (Lin Ming) BZ 392
9424
9425Fixed a problem with the Load operator where an exception was not
9426returned
9427in
9428the case where the table is already loaded. (Lin Ming) BZ 463
9429
9430Implemented support for the use of DDBHandles as an Indexed Reference, as
9431per
9432the ACPI spec. (Lin Ming) BZ 486
9433
9434Implemented support for UserTerm (Method invocation) for the Unload
9435operator
9436as per the ACPI spec. (Lin Ming) BZ 580
9437
9438Fixed a problem with the LoadTable operator where the OemId and
9439OemTableId
9440input strings could cause unexpected failures if they were shorter than
9441the
9442maximum lengths allowed. (Lin Ming, Bob Moore) BZ 576
9443
9444Implemented support for UserTerm (Method invocation) for the Unload
9445operator
9446as per the ACPI spec. (Lin Ming) BZ 580
9447
9448Implemented header file support for new ACPI tables - BERT, ERST, EINJ,
9449HEST,
9450IBFT, UEFI, WDAT. Disassembler support is forthcoming.
9451
9452Example Code and Data Size: These are the sizes for the OS-independent
9453acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9454debug version of the code includes the debug output trace mechanism and
9455has
9456a much larger code and data size.
9457
9458  Previous Release:
9459    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
9460    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
9461  Current Release:
9462    Non-Debug Version:  79.5K Code, 17.2K Data,  96.7K Total
9463    Debug Version:     159.0K Code, 63.8K Data, 222.8K Total
9464
94652) iASL Compiler/Disassembler and Tools:
9466
9467Implemented support in the disassembler for checksum validation on
9468incoming
9469binary DSDTs and SSDTs. If incorrect, a message is displayed within the
9470table
9471header dump at the start of the disassembly.
9472
9473Implemented additional debugging information in the namespace listing
9474file
9475created during compilation. In addition to the namespace hierarchy, the
9476full
9477pathname to each namespace object is displayed.
9478
9479Fixed a problem with the disassembler where invalid ACPI tables could
9480cause
9481faults or infinite loops.
9482
9483Fixed an unexpected parse error when using the optional "parameter types"
9484list in a control method declaration. (Lin Ming) BZ 397
9485
9486Fixed a problem where two External declarations with the same name did
9487not
9488cause an error (Lin Ming) BZ 509
9489
9490Implemented support for full TermArgs (adding Argx, Localx and method
9491invocation) for the ParameterData parameter to the LoadTable operator.
9492(Lin
9493Ming) BZ 583,587
9494
9495----------------------------------------
949619 December 2007. Summary of changes for version 20071219:
9497
94981) ACPI CA Core Subsystem:
9499
9500Implemented full support for deferred execution for the TermArg string
9501arguments for DataTableRegion. This enables forward references and full
9502operand resolution for the three string arguments. Similar to
9503OperationRegion
9504deferred argument execution.) Lin Ming. BZ 430
9505
9506Implemented full argument resolution support for the BankValue argument
9507to
9508BankField. Previously, only constants were supported, now any TermArg may
9509be
9510used. Lin Ming BZ 387, 393
9511
9512Fixed a problem with AcpiGetDevices where the search of a branch of the
9513device tree could be terminated prematurely. In accordance with the ACPI
9514specification, the search down the current branch is terminated if a
9515device
9516is both not present and not functional (instead of just not present.)
9517Yakui
9518Zhao.
9519
9520Fixed a problem where "unknown" GPEs could be allowed to fire repeatedly
9521if
9522the underlying AML code changed the GPE enable registers. Now, any
9523unknown
9524incoming GPE (no _Lxx/_Exx method and not the EC GPE) is immediately
9525disabled
9526instead of simply ignored. Rui Zhang.
9527
9528Fixed a problem with Index Fields where the Index register was
9529incorrectly
9530limited to a maximum of 32 bits. Now any size may be used.
9531
9532Fixed a couple memory leaks associated with "implicit return" objects
9533when
9534the AML Interpreter slack mode is enabled. Lin Ming BZ 349
9535
9536Example Code and Data Size: These are the sizes for the OS-independent
9537acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9538debug version of the code includes the debug output trace mechanism and
9539has
9540a much larger code and data size.
9541
9542  Previous Release:
9543    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
9544    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
9545  Current Release:
9546    Non-Debug Version:  79.3K Code, 17.2K Data,  96.5K Total
9547    Debug Version:     158.6K Code, 63.8K Data, 222.4K Total
9548
9549----------------------------------------
955014 November 2007. Summary of changes for version 20071114:
9551
95521) ACPI CA Core Subsystem:
9553
9554Implemented event counters for each of the Fixed Events, the ACPI SCI
9555(interrupt) itself, and control methods executed. Named
9556AcpiFixedEventCount[], AcpiSciCount, and AcpiMethodCount respectively.
9557These
9558should be useful for debugging and statistics.
9559
9560Implemented a new external interface, AcpiGetStatistics, to retrieve the
9561contents of the various event counters. Returns the current values for
9562AcpiSciCount, AcpiGpeCount, the AcpiFixedEventCount array, and
9563AcpiMethodCount. The interface can be expanded in the future if new
9564counters
9565are added. Device drivers should use this interface rather than access
9566the
9567counters directly.
9568
9569Fixed a problem with the FromBCD and ToBCD operators. With some
9570compilers,
9571the ShortDivide function worked incorrectly, causing problems with the
9572BCD
9573functions with large input values. A truncation from 64-bit to 32-bit
9574inadvertently occurred. Internal BZ 435. Lin Ming
9575
9576Fixed a problem with Index references passed as method arguments.
9577References
9578passed as arguments to control methods were dereferenced immediately
9579(before
9580control was passed to the called method). The references are now
9581correctly
9582passed directly to the called method. BZ 5389. Lin Ming
9583
9584Fixed a problem with CopyObject used in conjunction with the Index
9585operator.
9586The reference was incorrectly dereferenced before the copy. The reference
9587is
9588now correctly copied. BZ 5391. Lin Ming
9589
9590Fixed a problem with Control Method references within Package objects.
9591These
9592references are now correctly generated. This completes the package
9593construction overhaul that began in version 20071019.
9594
9595Example Code and Data Size: These are the sizes for the OS-independent
9596acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9597debug version of the code includes the debug output trace mechanism and
9598has
9599a much larger code and data size.
9600
9601  Previous Release:
9602    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
9603    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
9604  Current Release:
9605    Non-Debug Version:  79.0K Code, 17.2K Data,  96.2K Total
9606    Debug Version:     157.9K Code, 63.6K Data, 221.5K Total
9607
9608
96092) iASL Compiler/Disassembler and Tools:
9610
9611The AcpiExec utility now installs handlers for all of the predefined
9612Operation Region types. New types supported are: PCI_Config, CMOS, and
9613PCIBARTarget.
9614
9615Fixed a problem with the 64-bit version of AcpiExec where the extended
9616(64-
9617bit) address fields for the DSDT and FACS within the FADT were not being
9618used, causing truncation of the upper 32-bits of these addresses. Lin
9619Ming
9620and Bob Moore
9621
9622----------------------------------------
962319 October 2007. Summary of changes for version 20071019:
9624
96251) ACPI CA Core Subsystem:
9626
9627Fixed a problem with the Alias operator when the target of the alias is a
9628named ASL operator that opens a new scope -- Scope, Device,
9629PowerResource,
9630Processor, and ThermalZone. In these cases, any children of the original
9631operator could not be accessed via the alias, potentially causing
9632unexpected
9633AE_NOT_FOUND exceptions. (BZ 9067)
9634
9635Fixed a problem with the Package operator where all named references were
9636created as object references and left otherwise unresolved. According to
9637the
9638ACPI specification, a Package can only contain Data Objects or references
9639to
9640control methods. The implication is that named references to Data Objects
9641(Integer, Buffer, String, Package, BufferField, Field) should be resolved
9642immediately upon package creation. This is the approach taken with this
9643change. References to all other named objects (Methods, Devices, Scopes,
9644etc.) are all now properly created as reference objects. (BZ 5328)
9645
9646Reverted a change to Notify handling that was introduced in version
964720070508. This version changed the Notify handling from asynchronous to
9648fully synchronous (Device driver Notify handling with respect to the
9649Notify
9650ASL operator). It was found that this change caused more problems than it
9651solved and was removed by most users.
9652
9653Fixed a problem with the Increment and Decrement operators where the type
9654of
9655the target object could be unexpectedly and incorrectly changed. (BZ 353)
9656Lin Ming.
9657
9658Fixed a problem with the Load and LoadTable operators where the table
9659location within the namespace was ignored. Instead, the table was always
9660loaded into the root or current scope. Lin Ming.
9661
9662Fixed a problem with the Load operator when loading a table from a buffer
9663object. The input buffer was prematurely zeroed and/or deleted. (BZ 577)
9664
9665Fixed a problem with the Debug object where a store of a DdbHandle
9666reference
9667object to the Debug object could cause a fault.
9668
9669Added a table checksum verification for the Load operator, in the case
9670where
9671the load is from a buffer. (BZ 578).
9672
9673Implemented additional parameter validation for the LoadTable operator.
9674The
9675length of the input strings SignatureString, OemIdString, and OemTableId
9676are
9677now checked for maximum lengths. (BZ 582) Lin Ming.
9678
9679Example Code and Data Size: These are the sizes for the OS-independent
9680acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9681debug version of the code includes the debug output trace mechanism and
9682has
9683a much larger code and data size.
9684
9685  Previous Release:
9686    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
9687    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
9688  Current Release:
9689    Non-Debug Version:  78.8K Code, 17.2K Data,  96.0K Total
9690    Debug Version:     157.2K Code, 63.4K Data, 220.6K Total
9691
9692
96932) iASL Compiler/Disassembler:
9694
9695Fixed a problem where if a single file was specified and the file did not
9696exist, no error message was emitted. (Introduced with wildcard support in
9697version 20070917.)
9698
9699----------------------------------------
970019 September 2007. Summary of changes for version 20070919:
9701
97021) ACPI CA Core Subsystem:
9703
9704Designed and implemented new external interfaces to install and remove
9705handlers for ACPI table-related events. Current events that are defined
9706are
9707LOAD and UNLOAD. These interfaces allow the host to track ACPI tables as
9708they are dynamically loaded and unloaded. See AcpiInstallTableHandler and
9709AcpiRemoveTableHandler. (Lin Ming and Bob Moore)
9710
9711Fixed a problem where the use of the AcpiGbl_AllMethodsSerialized flag
9712(acpi_serialized option on Linux) could cause some systems to hang during
9713initialization. (Bob Moore) BZ 8171
9714
9715Fixed a problem where objects of certain types (Device, ThermalZone,
9716Processor, PowerResource) can be not found if they are declared and
9717referenced from within the same control method (Lin Ming) BZ 341
9718
9719Example Code and Data Size: These are the sizes for the OS-independent
9720acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9721debug version of the code includes the debug output trace mechanism and
9722has
9723a much larger code and data size.
9724
9725  Previous Release:
9726    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
9727    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
9728  Current Release:
9729    Non-Debug Version:  78.5K Code, 17.1K Data,  95.6K Total
9730    Debug Version:     156.7K Code, 63.2K Data, 219.9K Total
9731
9732
97332) iASL Compiler/Disassembler:
9734
9735Implemented support to allow multiple files to be compiled/disassembled
9736in
9737a
9738single invocation. This includes command line wildcard support for both
9739the
9740Windows and Unix versions of the compiler. This feature simplifies the
9741disassembly and compilation of multiple ACPI tables in a single
9742directory.
9743
9744----------------------------------------
974508 May 2007. Summary of changes for version 20070508:
9746
97471) ACPI CA Core Subsystem:
9748
9749Implemented a Microsoft compatibility design change for the handling of
9750the
9751Notify AML operator. Previously, notify handlers were dispatched and
9752executed completely asynchronously in a deferred thread. The new design
9753still executes the notify handlers in a different thread, but the
9754original
9755thread that executed the Notify() now waits at a synchronization point
9756for
9757the notify handler to complete. Some machines depend on a synchronous
9758Notify
9759operator in order to operate correctly.
9760
9761Implemented support to allow Package objects to be passed as method
9762arguments to the external AcpiEvaluateObject interface. Previously, this
9763would return the AE_NOT_IMPLEMENTED exception. This feature had not been
9764implemented since there were no reserved control methods that required it
9765until recently.
9766
9767Fixed a problem with the internal FADT conversion where ACPI 1.0 FADTs
9768that
9769contained invalid non-zero values in reserved fields could cause later
9770failures because these fields have meaning in later revisions of the
9771FADT.
9772For incoming ACPI 1.0 FADTs, these fields are now always zeroed. (The
9773fields
9774are: Preferred_PM_Profile, PSTATE_CNT, CST_CNT, and IAPC_BOOT_FLAGS.)
9775
9776Fixed a problem where the Global Lock handle was not properly updated if
9777a
9778thread that acquired the Global Lock via executing AML code then
9779attempted
9780to acquire the lock via the AcpiAcquireGlobalLock interface. Reported by
9781Joe
9782Liu.
9783
9784Fixed a problem in AcpiEvDeleteGpeXrupt where the global interrupt list
9785could be corrupted if the interrupt being removed was at the head of the
9786list. Reported by Linn Crosetto.
9787
9788Example Code and Data Size: These are the sizes for the OS-independent
9789acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9790debug version of the code includes the debug output trace mechanism and
9791has
9792a much larger code and data size.
9793
9794  Previous Release:
9795    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9796    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
9797  Current Release:
9798    Non-Debug Version:  78.3K Code, 17.0K Data,  95.3K Total
9799    Debug Version:     156.3K Code, 63.1K Data, 219.4K Total
9800
9801----------------------------------------
980220 March 2007. Summary of changes for version 20070320:
9803
98041) ACPI CA Core Subsystem:
9805
9806Implemented a change to the order of interpretation and evaluation of AML
9807operand objects within the AML interpreter. The interpreter now evaluates
9808operands in the order that they appear in the AML stream (and the
9809corresponding ASL code), instead of in the reverse order (after the
9810entire
9811operand list has been parsed). The previous behavior caused several
9812subtle
9813incompatibilities with the Microsoft AML interpreter as well as being
9814somewhat non-intuitive. BZ 7871, local BZ 263. Valery Podrezov.
9815
9816Implemented a change to the ACPI Global Lock support. All interfaces to
9817the
9818global lock now allow the same thread to acquire the lock multiple times.
9819This affects the AcpiAcquireGlobalLock external interface to the global
9820lock
9821as well as the internal use of the global lock to support AML fields -- a
9822control method that is holding the global lock can now simultaneously
9823access
9824AML fields that require global lock protection. Previously, in both
9825cases,
9826this would have resulted in an AE_ALREADY_ACQUIRED exception. The change
9827to
9828AcpiAcquireGlobalLock is of special interest to drivers for the Embedded
9829Controller. There is no change to the behavior of the AML Acquire
9830operator,
9831as this can already be used to acquire a mutex multiple times by the same
9832thread. BZ 8066. With assistance from Alexey Starikovskiy.
9833
9834Fixed a problem where invalid objects could be referenced in the AML
9835Interpreter after error conditions. During operand evaluation, ensure
9836that
9837the internal "Return Object" field is cleared on error and only valid
9838pointers are stored there. Caused occasional access to deleted objects
9839that
9840resulted in "large reference count" warning messages. Valery Podrezov.
9841
9842Fixed a problem where an AE_STACK_OVERFLOW internal exception could occur
9843on
9844deeply nested control method invocations. BZ 7873, local BZ 487. Valery
9845Podrezov.
9846
9847Fixed an internal problem with the handling of result objects on the
9848interpreter result stack. BZ 7872. Valery Podrezov.
9849
9850Removed obsolete code that handled the case where AML_NAME_OP is the
9851target
9852of a reference (Reference.Opcode). This code was no longer necessary. BZ
98537874. Valery Podrezov.
9854
9855Removed obsolete ACPI_NO_INTEGER64_SUPPORT from two header files. This
9856was
9857a
9858remnant from the previously discontinued 16-bit support.
9859
9860Example Code and Data Size: These are the sizes for the OS-independent
9861acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9862debug version of the code includes the debug output trace mechanism and
9863has
9864a much larger code and data size.
9865
9866  Previous Release:
9867    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9868    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
9869  Current Release:
9870    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9871    Debug Version:     155.9K Code, 63.1K Data, 219.0K Total
9872
9873----------------------------------------
987426 January 2007. Summary of changes for version 20070126:
9875
98761) ACPI CA Core Subsystem:
9877
9878Added the 2007 copyright to all module headers and signons. This affects
9879virtually every file in the ACPICA core subsystem, the iASL compiler, and
9880the utilities.
9881
9882Implemented a fix for an incorrect parameter passed to AcpiTbDeleteTable
9883during a table load. A bad pointer was passed in the case where the DSDT
9884is
9885overridden, causing a fault in this case.
9886
9887Example Code and Data Size: These are the sizes for the OS-independent
9888acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9889debug version of the code includes the debug output trace mechanism and
9890has
9891a much larger code and data size.
9892
9893  Previous Release:
9894    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9895    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
9896  Current Release:
9897    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9898    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
9899
9900----------------------------------------
990115 December 2006. Summary of changes for version 20061215:
9902
99031) ACPI CA Core Subsystem:
9904
9905Support for 16-bit ACPICA has been completely removed since it is no
9906longer
9907necessary and it clutters the code. All 16-bit macros, types, and
9908conditional compiles have been removed, cleaning up and simplifying the
9909code
9910across the entire subsystem. DOS support is no longer needed since the
9911bootable Linux firmware kit is now available.
9912
9913The handler for the Global Lock is now removed during AcpiTerminate to
9914enable a clean subsystem restart, via the implementation of the
9915AcpiEvRemoveGlobalLockHandler function. (With assistance from Joel Bretz,
9916HP)
9917
9918Implemented enhancements to the multithreading support within the
9919debugger
9920to enable improved multithreading debugging and evaluation of the
9921subsystem.
9922(Valery Podrezov)
9923
9924Debugger: Enhanced the Statistics/Memory command to emit the total
9925(maximum)
9926memory used during the execution, as well as the maximum memory consumed
9927by
9928each of the various object types. (Valery Podrezov)
9929
9930Example Code and Data Size: These are the sizes for the OS-independent
9931acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9932debug version of the code includes the debug output trace mechanism and
9933has
9934a much larger code and data size.
9935
9936  Previous Release:
9937    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
9938    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
9939  Current Release:
9940    Non-Debug Version:  78.0K Code, 17.1K Data,  95.1K Total
9941    Debug Version:     155.8K Code, 63.3K Data, 219.1K Total
9942
9943
99442) iASL Compiler/Disassembler and Tools:
9945
9946AcpiExec: Implemented a new option (-m) to display full memory use
9947statistics upon subsystem/program termination. (Valery Podrezov)
9948
9949----------------------------------------
995009 November 2006. Summary of changes for version 20061109:
9951
99521) ACPI CA Core Subsystem:
9953
9954Optimized the Load ASL operator in the case where the source operand is
9955an
9956operation region. Simply map the operation region memory, instead of
9957performing a bytewise read. (Region must be of type SystemMemory, see
9958below.)
9959
9960Fixed the Load ASL operator for the case where the source operand is a
9961region field. A buffer object is also allowed as the source operand. BZ
9962480
9963
9964Fixed a problem where the Load ASL operator allowed the source operand to
9965be
9966an operation region of any type. It is now restricted to regions of type
9967SystemMemory, as per the ACPI specification. BZ 481
9968
9969Additional cleanup and optimizations for the new Table Manager code.
9970
9971AcpiEnable will now fail if all of the required ACPI tables are not
9972loaded
9973(FADT, FACS, DSDT). BZ 477
9974
9975Added #pragma pack(8/4) to acobject.h to ensure that the structures in
9976this
9977header are always compiled as aligned. The ACPI_OPERAND_OBJECT has been
9978manually optimized to be aligned and will not work if it is byte-packed.
9979
9980Example Code and Data Size: These are the sizes for the OS-independent
9981acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
9982debug version of the code includes the debug output trace mechanism and
9983has
9984a much larger code and data size.
9985
9986  Previous Release:
9987    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
9988    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
9989  Current Release:
9990    Non-Debug Version:  77.9K Code, 17.0K Data,  94.9K Total
9991    Debug Version:     155.2K Code, 63.1K Data, 218.3K Total
9992
9993
99942) iASL Compiler/Disassembler and Tools:
9995
9996Fixed a problem where the presence of the _OSI predefined control method
9997within complex expressions could cause an internal compiler error.
9998
9999AcpiExec: Implemented full region support for multiple address spaces.
10000SpaceId is now part of the REGION object. BZ 429
10001
10002----------------------------------------
1000311 October 2006. Summary of changes for version 20061011:
10004
100051) ACPI CA Core Subsystem:
10006
10007Completed an AML interpreter performance enhancement for control method
10008execution. Previously a 2-pass parse/execution, control methods are now
10009completely parsed and executed in a single pass. This improves overall
10010interpreter performance by ~25%, reduces code size, and reduces CPU stack
10011use. (Valery Podrezov + interpreter changes in version 20051202 that
10012eliminated namespace loading during the pass one parse.)
10013
10014Implemented _CID support for PCI Root Bridge detection. If the _HID does
10015not
10016match the predefined PCI Root Bridge IDs, the _CID list (if present) is
10017now
10018obtained and also checked for an ID match.
10019
10020Implemented additional support for the PCI _ADR execution: upsearch until
10021a
10022device scope is found before executing _ADR. This allows PCI_Config
10023operation regions to be declared locally within control methods
10024underneath
10025PCI device objects.
10026
10027Fixed a problem with a possible race condition between threads executing
10028AcpiWalkNamespace and the AML interpreter. This condition was removed by
10029modifying AcpiWalkNamespace to (by default) ignore all temporary
10030namespace
10031entries created during any concurrent control method execution. An
10032additional namespace race condition is known to exist between
10033AcpiWalkNamespace and the Load/Unload ASL operators and is still under
10034investigation.
10035
10036Restructured the AML ParseLoop function, breaking it into several
10037subfunctions in order to reduce CPU stack use and improve
10038maintainability.
10039(Mikhail Kouzmich)
10040
10041AcpiGetHandle: Fix for parameter validation to detect invalid
10042combinations
10043of prefix handle and pathname. BZ 478
10044
10045Example Code and Data Size: These are the sizes for the OS-independent
10046acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10047debug version of the code includes the debug output trace mechanism and
10048has
10049a much larger code and data size.
10050
10051  Previous Release:
10052    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
10053    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
10054  Current Release:
10055    Non-Debug Version:  78.1K Code, 17.1K Data,  95.2K Total
10056    Debug Version:     155.4K Code, 63.1K Data, 218.5K Total
10057
100582) iASL Compiler/Disassembler and Tools:
10059
10060Ported the -g option (get local ACPI tables) to the new ACPICA Table
10061Manager
10062to restore original behavior.
10063
10064----------------------------------------
1006527 September 2006. Summary of changes for version 20060927:
10066
100671) ACPI CA Core Subsystem:
10068
10069Removed the "Flags" parameter from AcpiGetRegister and AcpiSetRegister.
10070These functions now use a spinlock for mutual exclusion and the interrupt
10071level indication flag is not needed.
10072
10073Fixed a problem with the Global Lock where the lock could appear to be
10074obtained before it is actually obtained. The global lock semaphore was
10075inadvertently created with one unit instead of zero units. (BZ 464)
10076Fiodor
10077Suietov.
10078
10079Fixed a possible memory leak and fault in AcpiExResolveObjectToValue
10080during
10081a read from a buffer or region field. (BZ 458) Fiodor Suietov.
10082
10083Example Code and Data Size: These are the sizes for the OS-independent
10084acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10085debug version of the code includes the debug output trace mechanism and
10086has
10087a much larger code and data size.
10088
10089  Previous Release:
10090    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
10091    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
10092  Current Release:
10093    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
10094    Debug Version:     154.6K Code, 63.0K Data, 217.6K Total
10095
10096
100972) iASL Compiler/Disassembler and Tools:
10098
10099Fixed a compilation problem with the pre-defined Resource Descriptor
10100field
10101names where an "object does not exist" error could be incorrectly
10102generated
10103if the parent ResourceTemplate pathname places the template within a
10104different namespace scope than the current scope. (BZ 7212)
10105
10106Fixed a problem where the compiler could hang after syntax errors
10107detected
10108in an ElseIf construct. (BZ 453)
10109
10110Fixed a problem with the AmlFilename parameter to the DefinitionBlock()
10111operator. An incorrect output filename was produced when this parameter
10112was
10113a null string (""). Now, the original input filename is used as the AML
10114output filename, with an ".aml" extension.
10115
10116Implemented a generic batch command mode for the AcpiExec utility
10117(execute
10118any AML debugger command) (Valery Podrezov).
10119
10120----------------------------------------
1012112 September 2006. Summary of changes for version 20060912:
10122
101231) ACPI CA Core Subsystem:
10124
10125Enhanced the implementation of the "serialized mode" of the interpreter
10126(enabled via the AcpiGbl_AllMethodsSerialized flag.) When this mode is
10127specified, instead of creating a serialization semaphore per control
10128method,
10129the interpreter lock is simply no longer released before a blocking
10130operation during control method execution. This effectively makes the AML
10131Interpreter single-threaded. The overhead of a semaphore per-method is
10132eliminated.
10133
10134Fixed a regression where an error was no longer emitted if a control
10135method
10136attempts to create 2 objects of the same name. This once again returns
10137AE_ALREADY_EXISTS. When this exception occurs, it invokes the mechanism
10138that
10139will dynamically serialize the control method to possible prevent future
10140errors. (BZ 440)
10141
10142Integrated a fix for a problem with PCI Express HID detection in the PCI
10143Config Space setup procedure. (BZ 7145)
10144
10145Moved all FADT-related functions to a new file, tbfadt.c. Eliminated the
10146AcpiHwInitialize function - the FADT registers are now validated when the
10147table is loaded.
10148
10149Added two new warnings during FADT verification - 1) if the FADT is
10150larger
10151than the largest known FADT version, and 2) if there is a mismatch
10152between
10153a
1015432-bit block address and the 64-bit X counterpart (when both are non-
10155zero.)
10156
10157Example Code and Data Size: These are the sizes for the OS-independent
10158acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10159debug version of the code includes the debug output trace mechanism and
10160has
10161a much larger code and data size.
10162
10163  Previous Release:
10164    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
10165    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
10166  Current Release:
10167    Non-Debug Version:  77.9K Code, 17.1K Data,  95.0K Total
10168    Debug Version:     154.7K Code, 63.0K Data, 217.7K Total
10169
10170
101712) iASL Compiler/Disassembler and Tools:
10172
10173Fixed a problem with the implementation of the Switch() operator where
10174the
10175temporary variable was declared too close to the actual Switch, instead
10176of
10177at method level. This could cause a problem if the Switch() operator is
10178within a while loop, causing an error on the second iteration. (BZ 460)
10179
10180Disassembler - fix for error emitted for unknown type for target of scope
10181operator. Now, ignore it and continue.
10182
10183Disassembly of an FADT now verifies the input FADT and reports any errors
10184found. Fix for proper disassembly of full-sized (ACPI 2.0) FADTs.
10185
10186Disassembly of raw data buffers with byte initialization data now
10187prefixes
10188each output line with the current buffer offset.
10189
10190Disassembly of ASF! table now includes all variable-length data fields at
10191the end of some of the subtables.
10192
10193The disassembler now emits a comment if a buffer appears to be a
10194ResourceTemplate, but cannot be disassembled as such because the EndTag
10195does
10196not appear at the very end of the buffer.
10197
10198AcpiExec - Added the "-t" command line option to enable the serialized
10199mode
10200of the AML interpreter.
10201
10202----------------------------------------
1020331 August 2006. Summary of changes for version 20060831:
10204
102051) ACPI CA Core Subsystem:
10206
10207Miscellaneous fixes for the Table Manager:
10208- Correctly initialize internal common FADT for all 64-bit "X" fields
10209- Fixed a couple table mapping issues during table load
10210- Fixed a couple alignment issues for IA64
10211- Initialize input array to zero in AcpiInitializeTables
10212- Additional parameter validation for AcpiGetTable, AcpiGetTableHeader,
10213AcpiGetTableByIndex
10214
10215Change for GPE support: when a "wake" GPE is received, all wake GPEs are
10216now
10217immediately disabled to prevent the waking GPE from firing again and to
10218prevent other wake GPEs from interrupting the wake process.
10219
10220Added the AcpiGpeCount global that tracks the number of processed GPEs,
10221to
10222be used for debugging systems with a large number of ACPI interrupts.
10223
10224Implemented support for the "DMAR" ACPI table (DMA Redirection Table) in
10225both the ACPICA headers and the disassembler.
10226
10227Example Code and Data Size: These are the sizes for the OS-independent
10228acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10229debug version of the code includes the debug output trace mechanism and
10230has
10231a much larger code and data size.
10232
10233  Previous Release:
10234    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
10235    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
10236  Current Release:
10237    Non-Debug Version:  77.9K Code, 16.7K Data,  94.6K Total
10238    Debug Version:     154.9K Code, 62.6K Data, 217.5K Total
10239
10240
102412) iASL Compiler/Disassembler and Tools:
10242
10243Disassembler support for the DMAR ACPI table.
10244
10245----------------------------------------
1024623 August 2006. Summary of changes for version 20060823:
10247
102481) ACPI CA Core Subsystem:
10249
10250The Table Manager component has been completely redesigned and
10251reimplemented. The new design is much simpler, and reduces the overall
10252code
10253and data size of the kernel-resident ACPICA by approximately 5%. Also, it
10254is
10255now possible to obtain the ACPI tables very early during kernel
10256initialization, even before dynamic memory management is initialized.
10257(Alexey Starikovskiy, Fiodor Suietov, Bob Moore)
10258
10259Obsolete ACPICA interfaces:
10260
10261- AcpiGetFirmwareTable: Use AcpiGetTable instead (works at early kernel
10262init
10263time).
10264- AcpiLoadTable: Not needed.
10265- AcpiUnloadTable: Not needed.
10266
10267New ACPICA interfaces:
10268
10269- AcpiInitializeTables: Must be called before the table manager can be
10270used.
10271- AcpiReallocateRootTable: Used to transfer the root table to dynamically
10272allocated memory after it becomes available.
10273- AcpiGetTableByIndex: Allows the host to easily enumerate all ACPI
10274tables
10275in the RSDT/XSDT.
10276
10277Other ACPICA changes:
10278
10279- AcpiGetTableHeader returns the actual mapped table header, not a copy.
10280Use
10281AcpiOsUnmapMemory to free this mapping.
10282- AcpiGetTable returns the actual mapped table. The mapping is managed
10283internally and must not be deleted by the caller. Use of this interface
10284causes no additional dynamic memory allocation.
10285- AcpiFindRootPointer: Support for physical addressing has been
10286eliminated,
10287it appeared to be unused.
10288- The interface to AcpiOsMapMemory has changed to be consistent with the
10289other allocation interfaces.
10290- The interface to AcpiOsGetRootPointer has changed to eliminate
10291unnecessary
10292parameters.
10293- ACPI_PHYSICAL_ADDRESS is now 32 bits on 32-bit platforms, 64 bits on
1029464-
10295bit platforms. Was previously 64 bits on all platforms.
10296- The interface to the ACPI Global Lock acquire/release macros have
10297changed
10298slightly since ACPICA no longer keeps a local copy of the FACS with a
10299constructed pointer to the actual global lock.
10300
10301Porting to the new table manager:
10302
10303- AcpiInitializeTables: Must be called once, and can be called anytime
10304during the OS initialization process. It allows the host to specify an
10305area
10306of memory to be used to store the internal version of the RSDT/XSDT (root
10307table). This allows the host to access ACPI tables before memory
10308management
10309is initialized and running.
10310- AcpiReallocateRootTable: Can be called after memory management is
10311running
10312to copy the root table to a dynamically allocated array, freeing up the
10313scratch memory specified in the call to AcpiInitializeTables.
10314- AcpiSubsystemInitialize: This existing interface is independent of the
10315Table Manager, and does not have to be called before the Table Manager
10316can
10317be used, it only must be called before the rest of ACPICA can be used.
10318- ACPI Tables: Some changes have been made to the names and structure of
10319the
10320actbl.h and actbl1.h header files and may require changes to existing
10321code.
10322For example, bitfields have been completely removed because of their lack
10323of
10324portability across C compilers.
10325- Update interfaces to the Global Lock acquire/release macros if local
10326versions are used. (see acwin.h)
10327
10328Obsolete files: tbconvrt.c, tbget.c, tbgetall.c, tbrsdt.c
10329
10330New files: tbfind.c
10331
10332Example Code and Data Size: These are the sizes for the OS-independent
10333acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10334debug version of the code includes the debug output trace mechanism and
10335has
10336a much larger code and data size.
10337
10338  Previous Release:
10339    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
10340    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
10341  Current Release:
10342    Non-Debug Version:  77.8K Code, 16.5K Data,  94.3K Total
10343    Debug Version:     154.6K Code, 62.3K Data, 216.9K Total
10344
10345
103462) iASL Compiler/Disassembler and Tools:
10347
10348No changes for this release.
10349
10350----------------------------------------
1035121 July 2006. Summary of changes for version 20060721:
10352
103531) ACPI CA Core Subsystem:
10354
10355The full source code for the ASL test suite used to validate the iASL
10356compiler and the ACPICA core subsystem is being released with the ACPICA
10357source for the first time. The source is contained in a separate package
10358and
10359consists of over 1100 files that exercise all ASL/AML operators. The
10360package
10361should appear on the Intel/ACPI web site shortly. (Valery Podrezov,
10362Fiodor
10363Suietov)
10364
10365Completed a new design and implementation for support of the ACPI Global
10366Lock. On the OS side, the global lock is now treated as a standard AML
10367mutex. Previously, multiple OS threads could "acquire" the global lock
10368simultaneously. However, this could cause the BIOS to be starved out of
10369the
10370lock - especially in cases such as the Embedded Controller driver where
10371there is a tight coupling between the OS and the BIOS.
10372
10373Implemented an optimization for the ACPI Global Lock interrupt mechanism.
10374The Global Lock interrupt handler no longer queues the execution of a
10375separate thread to signal the global lock semaphore. Instead, the
10376semaphore
10377is signaled directly from the interrupt handler.
10378
10379Implemented support within the AML interpreter for package objects that
10380contain a larger AML length (package list length) than the package
10381element
10382count. In this case, the length of the package is truncated to match the
10383package element count. Some BIOS code apparently modifies the package
10384length
10385on the fly, and this change supports this behavior. Provides
10386compatibility
10387with the MS AML interpreter. (With assistance from Fiodor Suietov)
10388
10389Implemented a temporary fix for the BankValue parameter of a Bank Field
10390to
10391support all constant values, now including the Zero and One opcodes.
10392Evaluation of this parameter must eventually be converted to a full
10393TermArg
10394evaluation. A not-implemented error is now returned (temporarily) for
10395non-
10396constant values for this parameter.
10397
10398Fixed problem reports (Fiodor Suietov) integrated:
10399- Fix for premature object deletion after CopyObject on Operation Region
10400(BZ
10401350)
10402
10403Example Code and Data Size: These are the sizes for the OS-independent
10404acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10405debug version of the code includes the debug output trace mechanism and
10406has
10407a much larger code and data size.
10408
10409  Previous Release:
10410    Non-Debug Version:  80.7K Code, 18.0K Data,  98.7K Total
10411    Debug Version:     160.9K Code, 65.1K Data, 226.0K Total
10412  Current Release:
10413    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
10414    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
10415
10416
104172) iASL Compiler/Disassembler and Tools:
10418
10419No changes for this release.
10420
10421----------------------------------------
1042207 July 2006. Summary of changes for version 20060707:
10423
104241) ACPI CA Core Subsystem:
10425
10426Added the ACPI_PACKED_POINTERS_NOT_SUPPORTED macro to support C compilers
10427that do not allow the initialization of address pointers within packed
10428structures - even though the hardware itself may support misaligned
10429transfers. Some of the debug data structures are packed by default to
10430minimize size.
10431
10432Added an error message for the case where AcpiOsGetThreadId() returns
10433zero.
10434A non-zero value is required by the core ACPICA code to ensure the proper
10435operation of AML mutexes and recursive control methods.
10436
10437The DSDT is now the only ACPI table that determines whether the AML
10438interpreter is in 32-bit or 64-bit mode. Not really a functional change,
10439but
10440the hooks for per-table 32/64 switching have been removed from the code.
10441A
10442clarification to the ACPI specification is forthcoming in ACPI 3.0B.
10443
10444Fixed a possible leak of an OwnerID in the error path of
10445AcpiTbInitTableDescriptor (tbinstal.c), and migrated all table OwnerID
10446deletion to a single place in AcpiTbUninstallTable to correct possible
10447leaks
10448when using the AcpiTbDeleteTablesByType interface (with assistance from
10449Lance Ortiz.)
10450
10451Fixed a problem with Serialized control methods where the semaphore
10452associated with the method could be over-signaled after multiple method
10453invocations.
10454
10455Fixed two issues with the locking of the internal namespace data
10456structure.
10457Both the Unload() operator and AcpiUnloadTable interface now lock the
10458namespace during the namespace deletion associated with the table unload
10459(with assistance from Linn Crosetto.)
10460
10461Fixed problem reports (Valery Podrezov) integrated:
10462- Eliminate unnecessary memory allocation for CreateXxxxField (BZ 5426)
10463
10464Fixed problem reports (Fiodor Suietov) integrated:
10465- Incomplete cleanup branches in AcpiTbGetTableRsdt (BZ 369)
10466- On Address Space handler deletion, needless deactivation call (BZ 374)
10467- AcpiRemoveAddressSpaceHandler: validate Device handle parameter (BZ
10468375)
10469- Possible memory leak, Notify sub-objects of Processor, Power,
10470ThermalZone
10471(BZ 376)
10472- AcpiRemoveAddressSpaceHandler: validate Handler parameter (BZ 378)
10473- Minimum Length of RSDT should be validated (BZ 379)
10474- AcpiRemoveNotifyHandler: return AE_NOT_EXIST if Processor Obj has no
10475Handler (BZ (380)
10476- AcpiUnloadTable: return AE_NOT_EXIST if no table of specified type
10477loaded
10478(BZ 381)
10479
10480Example Code and Data Size: These are the sizes for the OS-independent
10481acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10482debug version of the code includes the debug output trace mechanism and
10483has
10484a much larger code and data size.
10485
10486  Previous Release:
10487    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
10488    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
10489  Current Release:
10490    Non-Debug Version:  80.7K Code, 17.9K Data,  98.6K Total
10491    Debug Version:     161.0K Code, 65.1K Data, 226.1K Total
10492
10493
104942) iASL Compiler/Disassembler and Tools:
10495
10496Fixed problem reports:
10497Compiler segfault when ASL contains a long (>1024) String declaration (BZ
10498436)
10499
10500----------------------------------------
1050123 June 2006. Summary of changes for version 20060623:
10502
105031) ACPI CA Core Subsystem:
10504
10505Implemented a new ACPI_SPINLOCK type for the OSL lock interfaces. This
10506allows the type to be customized to the host OS for improved efficiency
10507(since a spinlock is usually a very small object.)
10508
10509Implemented support for "ignored" bits in the ACPI registers. According
10510to
10511the ACPI specification, these bits should be preserved when writing the
10512registers via a read/modify/write cycle. There are 3 bits preserved in
10513this
10514manner: PM1_CONTROL[0] (SCI_EN), PM1_CONTROL[9], and PM1_STATUS[11].
10515
10516Implemented the initial deployment of new OSL mutex interfaces. Since
10517some
10518host operating systems have separate mutex and semaphore objects, this
10519feature was requested. The base code now uses mutexes (and the new mutex
10520interfaces) wherever a binary semaphore was used previously. However, for
10521the current release, the mutex interfaces are defined as macros to map
10522them
10523to the existing semaphore interfaces. Therefore, no OSL changes are
10524required
10525at this time. (See acpiosxf.h)
10526
10527Fixed several problems with the support for the control method SyncLevel
10528parameter. The SyncLevel now works according to the ACPI specification
10529and
10530in concert with the Mutex SyncLevel parameter, since the current
10531SyncLevel
10532is a property of the executing thread. Mutual exclusion for control
10533methods
10534is now implemented with a mutex instead of a semaphore.
10535
10536Fixed three instances of the use of the C shift operator in the bitfield
10537support code (exfldio.c) to avoid the use of a shift value larger than
10538the
10539target data width. The behavior of C compilers is undefined in this case
10540and
10541can cause unpredictable results, and therefore the case must be detected
10542and
10543avoided. (Fiodor Suietov)
10544
10545Added an info message whenever an SSDT or OEM table is loaded dynamically
10546via the Load() or LoadTable() ASL operators. This should improve
10547debugging
10548capability since it will show exactly what tables have been loaded
10549(beyond
10550the tables present in the RSDT/XSDT.)
10551
10552Example Code and Data Size: These are the sizes for the OS-independent
10553acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10554debug version of the code includes the debug output trace mechanism and
10555has
10556a much larger code and data size.
10557
10558  Previous Release:
10559    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
10560    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
10561  Current Release:
10562    Non-Debug Version:  80.5K Code, 17.8K Data,  98.3K Total
10563    Debug Version:     160.8K Code, 64.8K Data, 225.6K Total
10564
10565
105662) iASL Compiler/Disassembler and Tools:
10567
10568No changes for this release.
10569
10570----------------------------------------
1057108 June 2006. Summary of changes for version 20060608:
10572
105731) ACPI CA Core Subsystem:
10574
10575Converted the locking mutex used for the ACPI hardware to a spinlock.
10576This
10577change should eliminate all problems caused by attempting to acquire a
10578semaphore at interrupt level, and it means that all ACPICA external
10579interfaces that directly access the ACPI hardware can be safely called
10580from
10581interrupt level. OSL code that implements the semaphore interfaces should
10582be
10583able to eliminate any workarounds for being called at interrupt level.
10584
10585Fixed a regression introduced in 20060526 where the ACPI device
10586initialization could be prematurely aborted with an AE_NOT_FOUND if a
10587device
10588did not have an optional _INI method.
10589
10590Fixed an IndexField issue where a write to the Data Register should be
10591limited in size to the AccessSize (width) of the IndexField itself. (BZ
10592433,
10593Fiodor Suietov)
10594
10595Fixed problem reports (Valery Podrezov) integrated:
10596- Allow store of ThermalZone objects to Debug object (BZ 5369/5370)
10597
10598Fixed problem reports (Fiodor Suietov) integrated:
10599- AcpiGetTableHeader doesn't handle multiple instances correctly (BZ 364)
10600
10601Removed four global mutexes that were obsolete and were no longer being
10602used.
10603
10604Example Code and Data Size: These are the sizes for the OS-independent
10605acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10606debug version of the code includes the debug output trace mechanism and
10607has
10608a much larger code and data size.
10609
10610  Previous Release:
10611    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
10612    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
10613  Current Release:
10614    Non-Debug Version:  80.0K Code, 17.6K Data,  97.6K Total
10615    Debug Version:     160.2K Code, 64.7K Data, 224.9K Total
10616
10617
106182) iASL Compiler/Disassembler and Tools:
10619
10620Fixed a fault when using -g option (get tables from registry) on Windows
10621machines.
10622
10623Fixed problem reports integrated:
10624- Generate error if CreateField NumBits parameter is zero. (BZ 405)
10625- Fault if Offset/Length in Field unit is very large (BZ 432, Fiodor
10626Suietov)
10627- Global table revision override (-r) is ignored (BZ 413)
10628
10629----------------------------------------
1063026 May 2006. Summary of changes for version 20060526:
10631
106321) ACPI CA Core Subsystem:
10633
10634Restructured, flattened, and simplified the internal interfaces for
10635namespace object evaluation - resulting in smaller code, less CPU stack
10636use,
10637and fewer interfaces. (With assistance from Mikhail Kouzmich)
10638
10639Fixed a problem with the CopyObject operator where the first parameter
10640was
10641not typed correctly for the parser, interpreter, compiler, and
10642disassembler.
10643Caused various errors and unexpected behavior.
10644
10645Fixed a problem where a ShiftLeft or ShiftRight of more than 64 bits
10646produced incorrect results with some C compilers. Since the behavior of C
10647compilers when the shift value is larger than the datatype width is
10648apparently not well defined, the interpreter now detects this condition
10649and
10650simply returns zero as expected in all such cases. (BZ 395)
10651
10652Fixed problem reports (Valery Podrezov) integrated:
10653- Update String-to-Integer conversion to match ACPI 3.0A spec (BZ 5329)
10654- Allow interpreter to handle nested method declarations (BZ 5361)
10655
10656Fixed problem reports (Fiodor Suietov) integrated:
10657- AcpiTerminate doesn't free debug memory allocation list objects (BZ
10658355)
10659- After Core Subsystem shutdown, AcpiSubsystemStatus returns AE_OK (BZ
10660356)
10661- AcpiOsUnmapMemory for RSDP can be invoked inconsistently (BZ 357)
10662- Resource Manager should return AE_TYPE for non-device objects (BZ 358)
10663- Incomplete cleanup branch in AcpiNsEvaluateRelative (BZ 359)
10664- Use AcpiOsFree instead of ACPI_FREE in AcpiRsSetSrsMethodData (BZ 360)
10665- Incomplete cleanup branch in AcpiPsParseAml (BZ 361)
10666- Incomplete cleanup branch in AcpiDsDeleteWalkState (BZ 362)
10667- AcpiGetTableHeader returns AE_NO_ACPI_TABLES until DSDT is loaded (BZ
10668365)
10669- Status of the Global Initialization Handler call not used (BZ 366)
10670- Incorrect object parameter to Global Initialization Handler (BZ 367)
10671
10672Example Code and Data Size: These are the sizes for the OS-independent
10673acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10674debug version of the code includes the debug output trace mechanism and
10675has
10676a much larger code and data size.
10677
10678  Previous Release:
10679    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
10680    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
10681  Current Release:
10682    Non-Debug Version:  80.0K Code, 17.7K Data,  97.7K Total
10683    Debug Version:     160.3K Code, 64.9K Data, 225.2K Total
10684
10685
106862) iASL Compiler/Disassembler and Tools:
10687
10688Modified the parser to allow the names IO, DMA, and IRQ to be used as
10689namespace identifiers with no collision with existing resource descriptor
10690macro names. This provides compatibility with other ASL compilers and is
10691most useful for disassembly/recompilation of existing tables without
10692parse
10693errors. (With assistance from Thomas Renninger)
10694
10695Disassembler: fixed an incorrect disassembly problem with the
10696DataTableRegion and CopyObject operators. Fixed a possible fault during
10697disassembly of some Alias operators.
10698
10699----------------------------------------
1070012 May 2006. Summary of changes for version 20060512:
10701
107021) ACPI CA Core Subsystem:
10703
10704Replaced the AcpiOsQueueForExecution interface with a new interface named
10705AcpiOsExecute. The major difference is that the new interface does not
10706have
10707a Priority parameter, this appeared to be useless and has been replaced
10708by
10709a
10710Type parameter. The Type tells the host what type of execution is being
10711requested, such as global lock handler, notify handler, GPE handler, etc.
10712This allows the host to queue and execute the request as appropriate for
10713the
10714request type, possibly using different work queues and different
10715priorities
10716for the various request types. This enables fixes for multithreading
10717deadlock problems such as BZ #5534, and will require changes to all
10718existing
10719OS interface layers. (Alexey Starikovskiy and Bob Moore)
10720
10721Fixed a possible memory leak associated with the support for the so-
10722called
10723"implicit return" ACPI extension. Reported by FreeBSD, BZ #6514. (Fiodor
10724Suietov)
10725
10726Fixed a problem with the Load() operator where a table load from an
10727operation region could overwrite an internal table buffer by up to 7
10728bytes
10729and cause alignment faults on IPF systems. (With assistance from Luming
10730Yu)
10731
10732Example Code and Data Size: These are the sizes for the OS-independent
10733acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10734debug version of the code includes the debug output trace mechanism and
10735has
10736a much larger code and data size.
10737
10738  Previous Release:
10739    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
10740    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
10741  Current Release:
10742    Non-Debug Version:  79.8K Code, 17.7K Data,  97.5K Total
10743    Debug Version:     160.5K Code, 65.1K Data, 225.6K Total
10744
10745
10746
107472) iASL Compiler/Disassembler and Tools:
10748
10749Disassembler: Implemented support to cross reference the internal
10750namespace
10751and automatically generate ASL External() statements for symbols not
10752defined
10753within the current table being disassembled. This will simplify the
10754disassembly and recompilation of interdependent tables such as SSDTs
10755since
10756these statements will no longer have to be added manually.
10757
10758Disassembler: Implemented experimental support to automatically detect
10759invocations of external control methods and generate appropriate
10760External()
10761statements. This is problematic because the AML cannot be correctly
10762parsed
10763until the number of arguments for each control method is known.
10764Currently,
10765standalone method invocations and invocations as the source operand of a
10766Store() statement are supported.
10767
10768Disassembler: Implemented support for the ASL pseudo-operators LNotEqual,
10769LLessEqual, and LGreaterEqual. Previously disassembled as LNot(LEqual()),
10770LNot(LGreater()), and LNot(LLess()), this makes the disassembled ASL code
10771more readable and likely closer to the original ASL source.
10772
10773----------------------------------------
1077421 April 2006. Summary of changes for version 20060421:
10775
107761) ACPI CA Core Subsystem:
10777
10778Removed a device initialization optimization introduced in 20051216 where
10779the _STA method was not run unless an _INI was also present for the same
10780device. This optimization could cause problems because it could allow
10781_INI
10782methods to be run within a not-present device subtree. (If a not-present
10783device had no _INI, _STA would not be run, the not-present status would
10784not
10785be discovered, and the children of the device would be incorrectly
10786traversed.)
10787
10788Implemented a new _STA optimization where namespace subtrees that do not
10789contain _INI are identified and ignored during device initialization.
10790Selectively running _STA can significantly improve boot time on large
10791machines (with assistance from Len Brown.)
10792
10793Implemented support for the device initialization case where the returned
10794_STA flags indicate a device not-present but functioning. In this case,
10795_INI
10796is not run, but the device children are examined for presence, as per the
10797ACPI specification.
10798
10799Implemented an additional change to the IndexField support in order to
10800conform to MS behavior. The value written to the Index Register is not
10801simply a byte offset, it is a byte offset in units of the access width of
10802the parent Index Field. (Fiodor Suietov)
10803
10804Defined and deployed a new OSL interface, AcpiOsValidateAddress. This
10805interface is called during the creation of all AML operation regions, and
10806allows the host OS to exert control over what addresses it will allow the
10807AML code to access. Operation Regions whose addresses are disallowed will
10808cause a runtime exception when they are actually accessed (will not
10809affect
10810or abort table loading.) See oswinxf or osunixxf for an example
10811implementation.
10812
10813Defined and deployed a new OSL interface, AcpiOsValidateInterface. This
10814interface allows the host OS to match the various "optional"
10815interface/behavior strings for the _OSI predefined control method as
10816appropriate (with assistance from Bjorn Helgaas.) See oswinxf or osunixxf
10817for an example implementation.
10818
10819Restructured and corrected various problems in the exception handling
10820code
10821paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod
10822(with assistance from Takayoshi Kochi.)
10823
10824Modified the Linux source converter to ignore quoted string literals
10825while
10826converting identifiers from mixed to lower case. This will correct
10827problems
10828with the disassembler and other areas where such strings must not be
10829modified.
10830
10831The ACPI_FUNCTION_* macros no longer require quotes around the function
10832name. This allows the Linux source converter to convert the names, now
10833that
10834the converter ignores quoted strings.
10835
10836Example Code and Data Size: These are the sizes for the OS-independent
10837acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10838debug version of the code includes the debug output trace mechanism and
10839has
10840a much larger code and data size.
10841
10842  Previous Release:
10843
10844    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
10845    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
10846  Current Release:
10847    Non-Debug Version:  79.7K Code, 17.7K Data,  97.4K Total
10848    Debug Version:     160.1K Code, 65.2K Data, 225.3K Total
10849
10850
108512) iASL Compiler/Disassembler and Tools:
10852
10853Implemented 3 new warnings for iASL, and implemented multiple warning
10854levels
10855(w2 flag).
10856
108571) Ignored timeouts: If the TimeoutValue parameter to Wait or Acquire is
10858not
10859WAIT_FOREVER (0xFFFF) and the code does not examine the return value to
10860check for the possible timeout, a warning is issued.
10861
108622) Useless operators: If an ASL operator does not specify an optional
10863target
10864operand and it also does not use the function return value from the
10865operator, a warning is issued since the operator effectively does
10866nothing.
10867
108683) Unreferenced objects: If a namespace object is created, but never
10869referenced, a warning is issued. This is a warning level 2 since there
10870are
10871cases where this is ok, such as when a secondary table is loaded that
10872uses
10873the unreferenced objects. Even so, care is taken to only flag objects
10874that
10875don't look like they will ever be used. For example, the reserved methods
10876(starting with an underscore) are usually not referenced because it is
10877expected that the OS will invoke them.
10878
10879----------------------------------------
1088031 March 2006. Summary of changes for version 20060331:
10881
108821) ACPI CA Core Subsystem:
10883
10884Implemented header file support for the following additional ACPI tables:
10885ASF!, BOOT, CPEP, DBGP, MCFG, SPCR, SPMI, TCPA, and WDRT. With this
10886support,
10887all current and known ACPI tables are now defined in the ACPICA headers
10888and
10889are available for use by device drivers and other software.
10890
10891Implemented support to allow tables that contain ACPI names with invalid
10892characters to be loaded. Previously, this would cause the table load to
10893fail, but since there are several known cases of such tables on existing
10894machines, this change was made to enable ACPI support for them. Also,
10895this
10896matches the behavior of the Microsoft ACPI implementation.
10897
10898Fixed a couple regressions introduced during the memory optimization in
10899the
1090020060317 release. The namespace node definition required additional
10901reorganization and an internal datatype that had been changed to 8-bit
10902was
10903restored to 32-bit. (Valery Podrezov)
10904
10905Fixed a problem where a null pointer passed to AcpiUtDeleteGenericState
10906could be passed through to AcpiOsReleaseObject which is unexpected. Such
10907null pointers are now trapped and ignored, matching the behavior of the
10908previous implementation before the deployment of AcpiOsReleaseObject.
10909(Valery Podrezov, Fiodor Suietov)
10910
10911Fixed a memory mapping leak during the deletion of a SystemMemory
10912operation
10913region where a cached memory mapping was not deleted. This became a
10914noticeable problem for operation regions that are defined within
10915frequently
10916used control methods. (Dana Meyers)
10917
10918Reorganized the ACPI table header files into two main files: one for the
10919ACPI tables consumed by the ACPICA core, and another for the
10920miscellaneous
10921ACPI tables that are consumed by the drivers and other software. The
10922various
10923FADT definitions were merged into one common section and three different
10924tables (ACPI 1.0, 1.0+, and 2.0)
10925
10926Example Code and Data Size: These are the sizes for the OS-independent
10927acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler. The
10928debug version of the code includes the debug output trace mechanism and
10929has
10930a much larger code and data size.
10931
10932  Previous Release:
10933    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
10934    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
10935  Current Release:
10936    Non-Debug Version:  81.1K Code, 17.7K Data,  98.8K Total
10937    Debug Version:     158.9K Code, 64.9K Data, 223.8K Total
10938
10939
109402) iASL Compiler/Disassembler and Tools:
10941
10942Disassembler: Implemented support to decode and format all non-AML ACPI
10943tables (tables other than DSDTs and SSDTs.) This includes the new tables
10944added to the ACPICA headers, therefore all current and known ACPI tables
10945are
10946supported.
10947
10948Disassembler: The change to allow ACPI names with invalid characters also
10949enables the disassembly of such tables. Invalid characters within names
10950are
10951changed to '*' to make the name printable; the iASL compiler will still
10952generate an error for such names, however, since this is an invalid ACPI
10953character.
10954
10955Implemented an option for AcpiXtract (-a) to extract all tables found in
10956the
10957input file. The default invocation extracts only the DSDTs and SSDTs.
10958
10959Fixed a couple of gcc generation issues for iASL and AcpiExec and added a
10960makefile for the AcpiXtract utility.
10961
10962----------------------------------------
1096317 March 2006. Summary of changes for version 20060317:
10964
109651) ACPI CA Core Subsystem:
10966
10967Implemented the use of a cache object for all internal namespace nodes.
10968Since there are about 1000 static nodes in a typical system, this will
10969decrease memory use for cache implementations that minimize per-
10970allocation
10971overhead (such as a slab allocator.)
10972
10973Removed the reference count mechanism for internal namespace nodes, since
10974it
10975was deemed unnecessary. This reduces the size of each namespace node by
10976about 5%-10% on all platforms. Nodes are now 20 bytes for the 32-bit
10977case,
10978and 32 bytes for the 64-bit case.
10979
10980Optimized several internal data structures to reduce object size on 64-
10981bit
10982platforms by packing data within the 64-bit alignment. This includes the
10983frequently used ACPI_OPERAND_OBJECT, of which there can be ~1000 static
10984instances corresponding to the namespace objects.
10985
10986Added two new strings for the predefined _OSI method: "Windows 2001.1
10987SP1"
10988and "Windows 2006".
10989
10990Split the allocation tracking mechanism out to a separate file, from
10991utalloc.c to uttrack.c. This mechanism appears to be only useful for
10992application-level code. Kernels may wish to not include uttrack.c in
10993distributions.
10994
10995Removed all remnants of the obsolete ACPI_REPORT_* macros and the
10996associated
10997code. (These macros have been replaced by the ACPI_ERROR and ACPI_WARNING
10998macros.)
10999
11000Code and Data Size: These are the sizes for the acpica.lib produced by
11001the
11002Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11003ACPI
11004driver or OSPM code. The debug version of the code includes the debug
11005output
11006trace mechanism and has a much larger code and data size. Note that these
11007values will vary depending on the efficiency of the compiler and the
11008compiler options used during generation.
11009
11010  Previous Release:
11011    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
11012    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
11013  Current Release:
11014    Non-Debug Version:  80.9K Code, 17.7K Data,  98.6K Total
11015    Debug Version:     158.7K Code, 64.8K Data, 223.5K Total
11016
11017
110182) iASL Compiler/Disassembler and Tools:
11019
11020Implemented an ANSI C version of the acpixtract utility. This version
11021will
11022automatically extract the DSDT and all SSDTs from the input acpidump text
11023file and dump the binary output to separate files. It can also display a
11024summary of the input file including the headers for each table found and
11025will extract any single ACPI table, with any signature. (See
11026source/tools/acpixtract)
11027
11028----------------------------------------
1102910 March 2006. Summary of changes for version 20060310:
11030
110311) ACPI CA Core Subsystem:
11032
11033Tagged all external interfaces to the subsystem with the new
11034ACPI_EXPORT_SYMBOL macro. This macro can be defined as necessary to
11035assist
11036kernel integration. For Linux, the macro resolves to the EXPORT_SYMBOL
11037macro. The default definition is NULL.
11038
11039Added the ACPI_THREAD_ID type for the return value from
11040AcpiOsGetThreadId.
11041This allows the host to define this as necessary to simplify kernel
11042integration. The default definition is ACPI_NATIVE_UINT.
11043
11044Fixed two interpreter problems related to error processing, the deletion
11045of
11046objects, and placing invalid pointers onto the internal operator result
11047stack. BZ 6028, 6151 (Valery Podrezov)
11048
11049Increased the reference count threshold where a warning is emitted for
11050large
11051reference counts in order to eliminate unnecessary warnings on systems
11052with
11053large namespaces (especially 64-bit.) Increased the value from 0x400 to
110540x800.
11055
11056Due to universal disagreement as to the meaning of the 'c' in the
11057calloc()
11058function, the ACPI_MEM_CALLOCATE macro has been renamed to
11059ACPI_ALLOCATE_ZEROED so that the purpose of the interface is 'clear'.
11060ACPI_MEM_ALLOCATE and ACPI_MEM_FREE are renamed to ACPI_ALLOCATE and
11061ACPI_FREE.
11062
11063Code and Data Size: These are the sizes for the acpica.lib produced by
11064the
11065Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11066ACPI
11067driver or OSPM code. The debug version of the code includes the debug
11068output
11069trace mechanism and has a much larger code and data size. Note that these
11070values will vary depending on the efficiency of the compiler and the
11071compiler options used during generation.
11072
11073  Previous Release:
11074    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
11075    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
11076  Current Release:
11077    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
11078    Debug Version:     161.6K Code, 65.7K Data, 227.3K Total
11079
11080
110812) iASL Compiler/Disassembler:
11082
11083Disassembler: implemented support for symbolic resource descriptor
11084references. If a CreateXxxxField operator references a fixed offset
11085within
11086a
11087resource descriptor, a name is assigned to the descriptor and the offset
11088is
11089translated to the appropriate resource tag and pathname. The addition of
11090this support brings the disassembled code very close to the original ASL
11091source code and helps eliminate run-time errors when the disassembled
11092code
11093is modified (and recompiled) in such a way as to invalidate the original
11094fixed offsets.
11095
11096Implemented support for a Descriptor Name as the last parameter to the
11097ASL
11098Register() macro. This parameter was inadvertently left out of the ACPI
11099specification, and will be added for ACPI 3.0b.
11100
11101Fixed a problem where the use of the "_OSI" string (versus the full path
11102"\_OSI") caused an internal compiler error. ("No back ptr to op")
11103
11104Fixed a problem with the error message that occurs when an invalid string
11105is
11106used for a _HID object (such as one with an embedded asterisk:
11107"*PNP010A".)
11108The correct message is now displayed.
11109
11110----------------------------------------
1111117 February 2006. Summary of changes for version 20060217:
11112
111131) ACPI CA Core Subsystem:
11114
11115Implemented a change to the IndexField support to match the behavior of
11116the
11117Microsoft AML interpreter. The value written to the Index register is now
11118a
11119byte offset, no longer an index based upon the width of the Data
11120register.
11121This should fix IndexField problems seen on some machines where the Data
11122register is not exactly one byte wide. The ACPI specification will be
11123clarified on this point.
11124
11125Fixed a problem where several resource descriptor types could overrun the
11126internal descriptor buffer due to size miscalculation: VendorShort,
11127VendorLong, and Interrupt. This was noticed on IA64 machines, but could
11128affect all platforms.
11129
11130Fixed a problem where individual resource descriptors were misaligned
11131within
11132the internal buffer, causing alignment faults on IA64 platforms.
11133
11134Code and Data Size: These are the sizes for the acpica.lib produced by
11135the
11136Microsoft Visual C++ 6.0 32-bit compiler. The values do not include any
11137ACPI
11138driver or OSPM code. The debug version of the code includes the debug
11139output
11140trace mechanism and has a much larger code and data size. Note that these
11141values will vary depending on the efficiency of the compiler and the
11142compiler options used during generation.
11143
11144  Previous Release:
11145    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
11146    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
11147  Current Release:
11148    Non-Debug Version:  81.0K Code, 17.8K Data,  98.8K Total
11149    Debug Version:     161.4K Code, 65.7K Data, 227.1K Total
11150
11151
111522) iASL Compiler/Disassembler:
11153
11154Implemented support for new reserved names: _WDG and _WED are Microsoft
11155extensions for Windows Instrumentation Management, _TDL is a new ACPI-
11156defined method (Throttling Depth Limit.)
11157
11158Fixed a problem where a zero-length VendorShort or VendorLong resource
11159descriptor was incorrectly emitted as a descriptor of length one.
11160
11161----------------------------------------
1116210 February 2006. Summary of changes for version 20060210:
11163
111641) ACPI CA Core Subsystem:
11165
11166Removed a couple of extraneous ACPI_ERROR messages that appeared during
11167normal execution. These became apparent after the conversion from
11168ACPI_DEBUG_PRINT.
11169
11170Fixed a problem where the CreateField operator could hang if the BitIndex
11171or
11172NumBits parameter referred to a named object. (Valery Podrezov, BZ 5359)
11173
11174Fixed a problem where a DeRefOf operation on a buffer object incorrectly
11175failed with an exception. This also fixes a couple of related RefOf and
11176DeRefOf issues. (Valery Podrezov, BZ 5360/5392/5387)
11177
11178Fixed a problem where the AE_BUFFER_LIMIT exception was returned instead
11179of
11180AE_STRING_LIMIT on an out-of-bounds Index() operation. (Valery Podrezov,
11181BZ
111825480)
11183
11184Implemented a memory cleanup at the end of the execution of each
11185iteration
11186of an AML While() loop, preventing the accumulation of outstanding
11187objects.
11188(Valery Podrezov, BZ 5427)
11189
11190Eliminated a chunk of duplicate code in the object resolution code.
11191(Valery
11192Podrezov, BZ 5336)
11193
11194Fixed several warnings during the 64-bit code generation.
11195
11196The AcpiSrc source code conversion tool now inserts one line of
11197whitespace
11198after an if() statement that is followed immediately by a comment,
11199improving
11200readability of the Linux code.
11201
11202Code and Data Size: The current and previous library sizes for the core
11203subsystem are shown below. These are the code and data sizes for the
11204acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11205These
11206values do not include any ACPI driver or OSPM code. The debug version of
11207the
11208code includes the debug output trace mechanism and has a much larger code
11209and data size. Note that these values will vary depending on the
11210efficiency
11211of the compiler and the compiler options used during generation.
11212
11213  Previous Release:
11214    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
11215    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
11216  Current Release:
11217    Non-Debug Version:  81.1K Code, 17.8K Data,  98.9K Total
11218    Debug Version:     161.3K Code, 65.6K Data, 226.9K Total
11219
11220
112212) iASL Compiler/Disassembler:
11222
11223Fixed a problem with the disassembly of a BankField operator with a
11224complex
11225expression for the BankValue parameter.
11226
11227----------------------------------------
1122827 January 2006. Summary of changes for version 20060127:
11229
112301) ACPI CA Core Subsystem:
11231
11232Implemented support in the Resource Manager to allow unresolved
11233namestring
11234references within resource package objects for the _PRT method. This
11235support
11236is in addition to the previously implemented unresolved reference support
11237within the AML parser. If the interpreter slack mode is enabled, these
11238unresolved references will be passed through to the caller as a NULL
11239package
11240entry.
11241
11242Implemented and deployed new macros and functions for error and warning
11243messages across the subsystem. These macros are simpler and generate less
11244code than their predecessors. The new macros ACPI_ERROR, ACPI_EXCEPTION,
11245ACPI_WARNING, and ACPI_INFO replace the ACPI_REPORT_* macros. The older
11246macros remain defined to allow ACPI drivers time to migrate to the new
11247macros.
11248
11249Implemented the ACPI_CPU_FLAGS type to simplify host OS integration of
11250the
11251Acquire/Release Lock OSL interfaces.
11252
11253Fixed a problem where Alias ASL operators are sometimes not correctly
11254resolved, in both the interpreter and the iASL compiler.
11255
11256Fixed several problems with the implementation of the
11257ConcatenateResTemplate
11258ASL operator. As per the ACPI specification, zero length buffers are now
11259treated as a single EndTag. One-length buffers always cause a fatal
11260exception. Non-zero length buffers that do not end with a full 2-byte
11261EndTag
11262cause a fatal exception.
11263
11264Fixed a possible structure overwrite in the AcpiGetObjectInfo external
11265interface. (With assistance from Thomas Renninger)
11266
11267Code and Data Size: The current and previous library sizes for the core
11268subsystem are shown below. These are the code and data sizes for the
11269acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11270These
11271values do not include any ACPI driver or OSPM code. The debug version of
11272the
11273code includes the debug output trace mechanism and has a much larger code
11274and data size. Note that these values will vary depending on the
11275efficiency
11276of the compiler and the compiler options used during generation.
11277
11278  Previous Release:
11279    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
11280    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
11281  Current Release:
11282    Non-Debug Version:  81.0K Code, 17.9K Data,  98.9K Total
11283    Debug Version:     161.3K Code, 65.7K Data, 227.0K Total
11284
11285
112862) iASL Compiler/Disassembler:
11287
11288Fixed an internal error that was generated for any forward references to
11289ASL
11290Alias objects.
11291
11292----------------------------------------
1129313 January 2006. Summary of changes for version 20060113:
11294
112951) ACPI CA Core Subsystem:
11296
11297Added 2006 copyright to all module headers and signons. This affects
11298virtually every file in the ACPICA core subsystem, iASL compiler, and the
11299utilities.
11300
11301Enhanced the ACPICA error reporting in order to simplify user migration
11302to
11303the non-debug version of ACPICA. Replaced all instances of the
11304ACPI_DEBUG_PRINT macro invoked at the ACPI_DB_ERROR and ACPI_DB_WARN
11305debug
11306levels with the ACPI_REPORT_ERROR and ACPI_REPORT_WARNING macros,
11307respectively. This preserves all error and warning messages in the non-
11308debug
11309version of the ACPICA code (this has been referred to as the "debug lite"
11310option.) Over 200 cases were converted to create a total of over 380
11311error/warning messages across the ACPICA code. This increases the code
11312and
11313data size of the default non-debug version of the code somewhat (about
1131413K),
11315but all error/warning reporting may be disabled if desired (and code
11316eliminated) by specifying the ACPI_NO_ERROR_MESSAGES compile-time
11317configuration option. The size of the debug version of ACPICA remains
11318about
11319the same.
11320
11321Fixed a memory leak within the AML Debugger "Set" command. One object was
11322not properly deleted for every successful invocation of the command.
11323
11324Code and Data Size: The current and previous library sizes for the core
11325subsystem are shown below. These are the code and data sizes for the
11326acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11327These
11328values do not include any ACPI driver or OSPM code. The debug version of
11329the
11330code includes the debug output trace mechanism and has a much larger code
11331and data size. Note that these values will vary depending on the
11332efficiency
11333of the compiler and the compiler options used during generation.
11334
11335  Previous Release:
11336    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
11337    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
11338  Current Release:
11339    Non-Debug Version:  83.1K Code, 18.4K Data, 101.5K Total
11340    Debug Version:     163.2K Code, 66.2K Data, 229.4K Total
11341
11342
113432) iASL Compiler/Disassembler:
11344
11345The compiler now officially supports the ACPI 3.0a specification that was
11346released on December 30, 2005. (Specification is available at
11347www.acpi.info)
11348
11349----------------------------------------
1135016 December 2005. Summary of changes for version 20051216:
11351
113521) ACPI CA Core Subsystem:
11353
11354Implemented optional support to allow unresolved names within ASL Package
11355objects. A null object is inserted in the package when a named reference
11356cannot be located in the current namespace. Enabled via the interpreter
11357slack flag, this should eliminate AE_NOT_FOUND exceptions seen on
11358machines
11359that contain such code.
11360
11361Implemented an optimization to the initialization sequence that can
11362improve
11363boot time. During ACPI device initialization, the _STA method is now run
11364if
11365and only if the _INI method exists. The _STA method is used to determine
11366if
11367the device is present; An _INI can only be run if _STA returns present,
11368but
11369it is a waste of time to run the _STA method if the _INI does not exist.
11370(Prototype and assistance from Dong Wei)
11371
11372Implemented use of the C99 uintptr_t for the pointer casting macros if it
11373is
11374available in the current compiler. Otherwise, the default (void *) cast
11375is
11376used as before.
11377
11378Fixed some possible memory leaks found within the execution path of the
11379Break, Continue, If, and CreateField operators. (Valery Podrezov)
11380
11381Fixed a problem introduced in the 20051202 release where an exception is
11382generated during method execution if a control method attempts to declare
11383another method.
11384
11385Moved resource descriptor string constants that are used by both the AML
11386disassembler and AML debugger to the common utilities directory so that
11387these components are independent.
11388
11389Implemented support in the AcpiExec utility (-e switch) to globally
11390ignore
11391exceptions during control method execution (method is not aborted.)
11392
11393Added the rsinfo.c source file to the AcpiExec makefile for Linux/Unix
11394generation.
11395
11396Code and Data Size: The current and previous library sizes for the core
11397subsystem are shown below. These are the code and data sizes for the
11398acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11399These
11400values do not include any ACPI driver or OSPM code. The debug version of
11401the
11402code includes the debug output trace mechanism and has a much larger code
11403and data size. Note that these values will vary depending on the
11404efficiency
11405of the compiler and the compiler options used during generation.
11406
11407  Previous Release:
11408    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
11409    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
11410  Current Release:
11411    Non-Debug Version:  76.6K Code, 12.3K Data,  88.9K Total
11412    Debug Version:     163.7K Code, 67.5K Data, 231.2K Total
11413
11414
114152) iASL Compiler/Disassembler:
11416
11417Fixed a problem where a CPU stack overflow fault could occur if a
11418recursive
11419method call was made from within a Return statement.
11420
11421----------------------------------------
1142202 December 2005. Summary of changes for version 20051202:
11423
114241) ACPI CA Core Subsystem:
11425
11426Modified the parsing of control methods to no longer create namespace
11427objects during the first pass of the parse. Objects are now created only
11428during the execute phase, at the moment the namespace creation operator
11429is
11430encountered in the AML (Name, OperationRegion, CreateByteField, etc.)
11431This
11432should eliminate ALREADY_EXISTS exceptions seen on some machines where
11433reentrant control methods are protected by an AML mutex. The mutex will
11434now
11435correctly block multiple threads from attempting to create the same
11436object
11437more than once.
11438
11439Increased the number of available Owner Ids for namespace object tracking
11440from 32 to 255. This should eliminate the OWNER_ID_LIMIT exceptions seen
11441on
11442some machines with a large number of ACPI tables (either static or
11443dynamic).
11444
11445Fixed a problem with the AcpiExec utility where a fault could occur when
11446the
11447-b switch (batch mode) is used.
11448
11449Enhanced the namespace dump routine to output the owner ID for each
11450namespace object.
11451
11452Code and Data Size: The current and previous library sizes for the core
11453subsystem are shown below. These are the code and data sizes for the
11454acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11455These
11456values do not include any ACPI driver or OSPM code. The debug version of
11457the
11458code includes the debug output trace mechanism and has a much larger code
11459and data size. Note that these values will vary depending on the
11460efficiency
11461of the compiler and the compiler options used during generation.
11462
11463  Previous Release:
11464    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
11465    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
11466  Current Release:
11467    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
11468    Debug Version:     163.2K Code, 67.4K Data, 230.6K Total
11469
11470
114712) iASL Compiler/Disassembler:
11472
11473Fixed a parse error during compilation of certain Switch/Case constructs.
11474To
11475simplify the parse, the grammar now allows for multiple Default
11476statements
11477and this error is now detected and flagged during the analysis phase.
11478
11479Disassembler: The disassembly now includes the contents of the original
11480table header within a comment at the start of the file. This includes the
11481name and version of the original ASL compiler.
11482
11483----------------------------------------
1148417 November 2005. Summary of changes for version 20051117:
11485
114861) ACPI CA Core Subsystem:
11487
11488Fixed a problem in the AML parser where the method thread count could be
11489decremented below zero if any errors occurred during the method parse
11490phase.
11491This should eliminate AE_AML_METHOD_LIMIT exceptions seen on some
11492machines.
11493This also fixed a related regression with the mechanism that detects and
11494corrects methods that cannot properly handle reentrancy (related to the
11495deployment of the new OwnerId mechanism.)
11496
11497Eliminated the pre-parsing of control methods (to detect errors) during
11498table load. Related to the problem above, this was causing unwind issues
11499if
11500any errors occurred during the parse, and it seemed to be overkill. A
11501table
11502load should not be aborted if there are problems with any single control
11503method, thus rendering this feature rather pointless.
11504
11505Fixed a problem with the new table-driven resource manager where an
11506internal
11507buffer overflow could occur for small resource templates.
11508
11509Implemented a new external interface, AcpiGetVendorResource. This
11510interface
11511will find and return a vendor-defined resource descriptor within a _CRS
11512or
11513_PRS method via an ACPI 3.0 UUID match. With assistance from Bjorn
11514Helgaas.
11515
11516Removed the length limit (200) on string objects as per the upcoming ACPI
115173.0A specification. This affects the following areas of the interpreter:
115181)
11519any implicit conversion of a Buffer to a String, 2) a String object
11520result
11521of the ASL Concatenate operator, 3) the String object result of the ASL
11522ToString operator.
11523
11524Fixed a problem in the Windows OS interface layer (OSL) where a
11525WAIT_FOREVER
11526on a semaphore object would incorrectly timeout. This allows the
11527multithreading features of the AcpiExec utility to work properly under
11528Windows.
11529
11530Updated the Linux makefiles for the iASL compiler and AcpiExec to include
11531the recently added file named "utresrc.c".
11532
11533Code and Data Size: The current and previous library sizes for the core
11534subsystem are shown below. These are the code and data sizes for the
11535acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11536These
11537values do not include any ACPI driver or OSPM code. The debug version of
11538the
11539code includes the debug output trace mechanism and has a much larger code
11540and data size. Note that these values will vary depending on the
11541efficiency
11542of the compiler and the compiler options used during generation.
11543
11544  Previous Release:
11545    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
11546    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
11547  Current Release:
11548    Non-Debug Version:  76.3K Code, 12.3K Data,  88.6K Total
11549    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
11550
11551
115522) iASL Compiler/Disassembler:
11553
11554Removed the limit (200) on string objects as per the upcoming ACPI 3.0A
11555specification. For the iASL compiler, this means that string literals
11556within
11557the source ASL can be of any length.
11558
11559Enhanced the listing output to dump the AML code for resource descriptors
11560immediately after the ASL code for each descriptor, instead of in a block
11561at
11562the end of the entire resource template.
11563
11564Enhanced the compiler debug output to dump the entire original parse tree
11565constructed during the parse phase, before any transforms are applied to
11566the
11567tree. The transformed tree is dumped also.
11568
11569----------------------------------------
1157002 November 2005. Summary of changes for version 20051102:
11571
115721) ACPI CA Core Subsystem:
11573
11574Modified the subsystem initialization sequence to improve GPE support.
11575The
11576GPE initialization has been split into two parts in order to defer
11577execution
11578of the _PRW methods (Power Resources for Wake) until after the hardware
11579is
11580fully initialized and the SCI handler is installed. This allows the _PRW
11581methods to access fields protected by the Global Lock. This will fix
11582systems
11583where a NO_GLOBAL_LOCK exception has been seen during initialization.
11584
11585Converted the ACPI internal object disassemble and display code within
11586the
11587AML debugger to fully table-driven operation, reducing code size and
11588increasing maintainability.
11589
11590Fixed a regression with the ConcatenateResTemplate() ASL operator
11591introduced
11592in the 20051021 release.
11593
11594Implemented support for "local" internal ACPI object types within the
11595debugger "Object" command and the AcpiWalkNamespace external interfaces.
11596These local types include RegionFields, BankFields, IndexFields, Alias,
11597and
11598reference objects.
11599
11600Moved common AML resource handling code into a new file, "utresrc.c".
11601This
11602code is shared by both the Resource Manager and the AML Debugger.
11603
11604Code and Data Size: The current and previous library sizes for the core
11605subsystem are shown below. These are the code and data sizes for the
11606acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11607These
11608values do not include any ACPI driver or OSPM code. The debug version of
11609the
11610code includes the debug output trace mechanism and has a much larger code
11611and data size. Note that these values will vary depending on the
11612efficiency
11613of the compiler and the compiler options used during generation.
11614
11615  Previous Release:
11616    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
11617    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
11618  Current Release:
11619    Non-Debug Version:  76.2K Code, 12.3K Data,  88.5K Total
11620    Debug Version:     163.0K Code, 67.4K Data, 230.4K Total
11621
11622
116232) iASL Compiler/Disassembler:
11624
11625Fixed a problem with very large initializer lists (more than 4000
11626elements)
11627for both Buffer and Package objects where the parse stack could overflow.
11628
11629Enhanced the pre-compile source code scan for non-ASCII characters to
11630ignore
11631characters within comment fields. The scan is now always performed and is
11632no
11633longer optional, detecting invalid characters within a source file
11634immediately rather than during the parse phase or later.
11635
11636Enhanced the ASL grammar definition to force early reductions on all
11637list-
11638style grammar elements so that the overall parse stack usage is greatly
11639reduced. This should improve performance and reduce the possibility of
11640parse
11641stack overflow.
11642
11643Eliminated all reduce/reduce conflicts in the iASL parser generation.
11644Also,
11645with the addition of a %expected statement, the compiler generates from
11646source with no warnings.
11647
11648Fixed a possible segment fault in the disassembler if the input filename
11649does not contain a "dot" extension (Thomas Renninger).
11650
11651----------------------------------------
1165221 October 2005. Summary of changes for version 20051021:
11653
116541) ACPI CA Core Subsystem:
11655
11656Implemented support for the EM64T and other x86-64 processors. This
11657essentially entails recognizing that these processors support non-aligned
11658memory transfers. Previously, all 64-bit processors were assumed to lack
11659hardware support for non-aligned transfers.
11660
11661Completed conversion of the Resource Manager to nearly full table-driven
11662operation. Specifically, the resource conversion code (convert AML to
11663internal format and the reverse) and the debug code to dump internal
11664resource descriptors are fully table-driven, reducing code and data size
11665and
11666improving maintainability.
11667
11668The OSL interfaces for Acquire and Release Lock now use a 64-bit flag
11669word
11670on 64-bit processors instead of a fixed 32-bit word. (With assistance
11671from
11672Alexey Starikovskiy)
11673
11674Implemented support within the resource conversion code for the Type-
11675Specific byte within the various ACPI 3.0 *WordSpace macros.
11676
11677Fixed some issues within the resource conversion code for the type-
11678specific
11679flags for both Memory and I/O address resource descriptors. For Memory,
11680implemented support for the MTP and TTP flags. For I/O, split the TRS and
11681TTP flags into two separate fields.
11682
11683Code and Data Size: The current and previous library sizes for the core
11684subsystem are shown below. These are the code and data sizes for the
11685acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11686These
11687values do not include any ACPI driver or OSPM code. The debug version of
11688the
11689code includes the debug output trace mechanism and has a much larger code
11690and data size. Note that these values will vary depending on the
11691efficiency
11692of the compiler and the compiler options used during generation.
11693
11694  Previous Release:
11695    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
11696    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
11697  Current Release:
11698    Non-Debug Version:  76.1K Code, 12.2K Data,  88.3K Total
11699    Debug Version:     163.5K Code, 67.0K Data, 230.5K Total
11700
11701
11702
117032) iASL Compiler/Disassembler:
11704
11705Relaxed a compiler restriction that disallowed a ResourceIndex byte if
11706the
11707corresponding ResourceSource string was not also present in a resource
11708descriptor declaration. This restriction caused problems with existing
11709AML/ASL code that includes the Index byte without the string. When such
11710AML
11711was disassembled, it could not be compiled without modification. Further,
11712the modified code created a resource template with a different size than
11713the
11714original, breaking code that used fixed offsets into the resource
11715template
11716buffer.
11717
11718Removed a recent feature of the disassembler to ignore a lone
11719ResourceIndex
11720byte. This byte is now emitted if present so that the exact AML can be
11721reproduced when the disassembled code is recompiled.
11722
11723Improved comments and text alignment for the resource descriptor code
11724emitted by the disassembler.
11725
11726Implemented disassembler support for the ACPI 3.0 AccessSize field within
11727a
11728Register() resource descriptor.
11729
11730----------------------------------------
1173130 September 2005. Summary of changes for version 20050930:
11732
117331) ACPI CA Core Subsystem:
11734
11735Completed a major overhaul of the Resource Manager code - specifically,
11736optimizations in the area of the AML/internal resource conversion code.
11737The
11738code has been optimized to simplify and eliminate duplicated code, CPU
11739stack
11740use has been decreased by optimizing function parameters and local
11741variables, and naming conventions across the manager have been
11742standardized
11743for clarity and ease of maintenance (this includes function, parameter,
11744variable, and struct/typedef names.) The update may force changes in some
11745driver code, depending on how resources are handled by the host OS.
11746
11747All Resource Manager dispatch and information tables have been moved to a
11748single location for clarity and ease of maintenance. One new file was
11749created, named "rsinfo.c".
11750
11751The ACPI return macros (return_ACPI_STATUS, etc.) have been modified to
11752guarantee that the argument is not evaluated twice, making them less
11753prone
11754to macro side-effects. However, since there exists the possibility of
11755additional stack use if a particular compiler cannot optimize them (such
11756as
11757in the debug generation case), the original macros are optionally
11758available.
11759Note that some invocations of the return_VALUE macro may now cause size
11760mismatch warnings; the return_UINT8 and return_UINT32 macros are provided
11761to
11762eliminate these. (From Randy Dunlap)
11763
11764Implemented a new mechanism to enable debug tracing for individual
11765control
11766methods. A new external interface, AcpiDebugTrace, is provided to enable
11767this mechanism. The intent is to allow the host OS to easily enable and
11768disable tracing for problematic control methods. This interface can be
11769easily exposed to a user or debugger interface if desired. See the file
11770psxface.c for details.
11771
11772AcpiUtCallocate will now return a valid pointer if a length of zero is
11773specified - a length of one is used and a warning is issued. This matches
11774the behavior of AcpiUtAllocate.
11775
11776Code and Data Size: The current and previous library sizes for the core
11777subsystem are shown below. These are the code and data sizes for the
11778acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11779These
11780values do not include any ACPI driver or OSPM code. The debug version of
11781the
11782code includes the debug output trace mechanism and has a much larger code
11783and data size. Note that these values will vary depending on the
11784efficiency
11785of the compiler and the compiler options used during generation.
11786
11787  Previous Release:
11788    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
11789    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
11790  Current Release:
11791    Non-Debug Version:  77.1K Code, 12.1K Data,  89.2K Total
11792    Debug Version:     168.0K Code, 68.3K Data, 236.3K Total
11793
11794
117952) iASL Compiler/Disassembler:
11796
11797A remark is issued if the effective compile-time length of a package or
11798buffer is zero. Previously, this was a warning.
11799
11800----------------------------------------
1180116 September 2005. Summary of changes for version 20050916:
11802
118031) ACPI CA Core Subsystem:
11804
11805Fixed a problem within the Resource Manager where support for the Generic
11806Register descriptor was not fully implemented. This descriptor is now
11807fully
11808recognized, parsed, disassembled, and displayed.
11809
11810Completely restructured the Resource Manager code to utilize table-driven
11811dispatch and lookup, eliminating many of the large switch() statements.
11812This
11813reduces overall subsystem code size and code complexity. Affects the
11814resource parsing and construction, disassembly, and debug dump output.
11815
11816Cleaned up and restructured the debug dump output for all resource
11817descriptors. Improved readability of the output and reduced code size.
11818
11819Fixed a problem where changes to internal data structures caused the
11820optional ACPI_MUTEX_DEBUG code to fail compilation if specified.
11821
11822Code and Data Size: The current and previous library sizes for the core
11823subsystem are shown below. These are the code and data sizes for the
11824acpica.lib produced by the Microsoft Visual C++ 6.0 32-bit compiler.
11825These
11826values do not include any ACPI driver or OSPM code. The debug version of
11827the
11828code includes the debug output trace mechanism and has a much larger code
11829and data size. Note that these values will vary depending on the
11830efficiency
11831of the compiler and the compiler options used during generation.
11832
11833  Previous Release:
11834    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
11835    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
11836  Current Release:
11837    Non-Debug Version:  77.5K Code, 12.0K Data,  89.5K Total
11838    Debug Version:     168.1K Code, 68.4K Data, 236.5K Total
11839
11840
118412) iASL Compiler/Disassembler:
11842
11843Updated the disassembler to automatically insert an EndDependentFn()
11844macro
11845into the ASL stream if this macro is missing in the original AML code,
11846simplifying compilation of the resulting ASL module.
11847
11848Fixed a problem in the disassembler where a disassembled ResourceSource
11849string (within a large resource descriptor) was not surrounded by quotes
11850and
11851not followed by a comma, causing errors when the resulting ASL module was
11852compiled. Also, escape sequences within a ResourceSource string are now
11853handled correctly (especially "\\")
11854
11855----------------------------------------
1185602 September 2005. Summary of changes for version 20050902:
11857
118581) ACPI CA Core Subsystem:
11859
11860Fixed a problem with the internal Owner ID allocation and deallocation
11861mechanisms for control method execution and recursive method invocation.
11862This should eliminate the OWNER_ID_LIMIT exceptions and "Invalid OwnerId"
11863messages seen on some systems. Recursive method invocation depth is
11864currently limited to 255. (Alexey Starikovskiy)
11865
11866Completely eliminated all vestiges of support for the "module-level
11867executable code" until this support is fully implemented and debugged.
11868This
11869should eliminate the NO_RETURN_VALUE exceptions seen during table load on
11870some systems that invoke this support.
11871
11872Fixed a problem within the resource manager code where the transaction
11873flags
11874for a 64-bit address descriptor were handled incorrectly in the type-
11875specific flag byte.
11876
11877Consolidated duplicate code within the address descriptor resource
11878manager
11879code, reducing overall subsystem code size.
11880
11881Fixed a fault when using the AML debugger "disassemble" command to
11882disassemble individual control methods.
11883
11884Removed references to the "release_current" directory within the Unix
11885release package.
11886
11887Code and Data Size: The current and previous core subsystem library sizes
11888are shown below. These are the code and data sizes for the acpica.lib
11889produced by the Microsoft Visual C++ 6.0 compiler. These values do not
11890include any ACPI driver or OSPM code. The debug version of the code
11891includes
11892the debug output trace mechanism and has a much larger code and data
11893size.
11894Note that these values will vary depending on the efficiency of the
11895compiler
11896and the compiler options used during generation.
11897
11898  Previous Release:
11899    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
11900    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
11901  Current Release:
11902    Non-Debug Version:  78.4K Code, 11.8K Data,  90.2K Total
11903    Debug Version:     169.6K Code, 69.9K Data, 239.5K Total
11904
11905
119062) iASL Compiler/Disassembler:
11907
11908Implemented an error check for illegal duplicate values in the interrupt
11909and
11910dma lists for the following ASL macros: Dma(), Irq(), IrqNoFlags(), and
11911Interrupt().
11912
11913Implemented error checking for the Irq() and IrqNoFlags() macros to
11914detect
11915too many values in the interrupt list (16 max) and invalid values in the
11916list (range 0 - 15)
11917
11918The maximum length string literal within an ASL file is now restricted to
11919200 characters as per the ACPI specification.
11920
11921Fixed a fault when using the -ln option (generate namespace listing).
11922
11923Implemented an error check to determine if a DescriptorName within a
11924resource descriptor has already been used within the current scope.
11925
11926----------------------------------------
1192715 August 2005.  Summary of changes for version 20050815:
11928
119291) ACPI CA Core Subsystem:
11930
11931Implemented a full bytewise compare to determine if a table load request
11932is
11933attempting to load a duplicate table. The compare is performed if the
11934table
11935signatures and table lengths match. This will allow different tables with
11936the same OEM Table ID and revision to be loaded - probably against the
11937ACPI
11938specification, but discovered in the field nonetheless.
11939
11940Added the changes.txt logfile to each of the zipped release packages.
11941
11942Code and Data Size: Current and previous core subsystem library sizes are
11943shown below. These are the code and data sizes for the acpica.lib
11944produced
11945by the Microsoft Visual C++ 6.0 compiler, and these values do not include
11946any ACPI driver or OSPM code. The debug version of the code includes the
11947debug output trace mechanism and has a much larger code and data size.
11948Note
11949that these values will vary depending on the efficiency of the compiler
11950and
11951the compiler options used during generation.
11952
11953  Previous Release:
11954    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
11955    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
11956  Current Release:
11957    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
11958    Debug Version:     170.0K Code, 69.9K Data, 239.9K Total
11959
11960
119612) iASL Compiler/Disassembler:
11962
11963Fixed a problem where incorrect AML code could be generated for Package
11964objects if optimization is disabled (via the -oa switch).
11965
11966Fixed a problem with where incorrect AML code is generated for variable-
11967length packages when the package length is not specified and the number
11968of
11969initializer values is greater than 255.
11970
11971
11972----------------------------------------
1197329 July 2005.  Summary of changes for version 20050729:
11974
119751) ACPI CA Core Subsystem:
11976
11977Implemented support to ignore an attempt to install/load a particular
11978ACPI
11979table more than once. Apparently there exists BIOS code that repeatedly
11980attempts to load the same SSDT upon certain events. With assistance from
11981Venkatesh Pallipadi.
11982
11983Restructured the main interface to the AML parser in order to correctly
11984handle all exceptional conditions. This will prevent leakage of the
11985OwnerId
11986resource and should eliminate the AE_OWNER_ID_LIMIT exceptions seen on
11987some
11988machines. With assistance from Alexey Starikovskiy.
11989
11990Support for "module level code" has been disabled in this version due to
11991a
11992number of issues that have appeared on various machines. The support can
11993be
11994enabled by defining ACPI_ENABLE_MODULE_LEVEL_CODE during subsystem
11995compilation. When the issues are fully resolved, the code will be enabled
11996by
11997default again.
11998
11999Modified the internal functions for debug print support to define the
12000FunctionName parameter as a (const char *) for compatibility with
12001compiler
12002built-in macros such as __FUNCTION__, etc.
12003
12004Linted the entire ACPICA source tree for both 32-bit and 64-bit.
12005
12006Implemented support to display an object count summary for the AML
12007Debugger
12008commands Object and Methods.
12009
12010Code and Data Size: Current and previous core subsystem library sizes are
12011shown below. These are the code and data sizes for the acpica.lib
12012produced
12013by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12014any ACPI driver or OSPM code. The debug version of the code includes the
12015debug output trace mechanism and has a much larger code and data size.
12016Note
12017that these values will vary depending on the efficiency of the compiler
12018and
12019the compiler options used during generation.
12020
12021  Previous Release:
12022    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
12023    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
12024  Current Release:
12025    Non-Debug Version:  78.6K Code, 11.7K Data,  90.3K Total
12026    Debug Version:     167.0K Code, 69.9K Data, 236.9K Total
12027
12028
120292) iASL Compiler/Disassembler:
12030
12031Fixed a regression that appeared in the 20050708 version of the compiler
12032where an error message was inadvertently emitted for invocations of the
12033_OSI
12034reserved control method.
12035
12036----------------------------------------
1203708 July 2005.  Summary of changes for version 20050708:
12038
120391) ACPI CA Core Subsystem:
12040
12041The use of the CPU stack in the debug version of the subsystem has been
12042considerably reduced. Previously, a debug structure was declared in every
12043function that used the debug macros. This structure has been removed in
12044favor of declaring the individual elements as parameters to the debug
12045functions. This reduces the cumulative stack use during nested execution
12046of
12047ACPI function calls at the cost of a small increase in the code size of
12048the
12049debug version of the subsystem. With assistance from Alexey Starikovskiy
12050and
12051Len Brown.
12052
12053Added the ACPI_GET_FUNCTION_NAME macro to enable the compiler-dependent
12054headers to define a macro that will return the current function name at
12055runtime (such as __FUNCTION__ or _func_, etc.) The function name is used
12056by
12057the debug trace output. If ACPI_GET_FUNCTION_NAME is not defined in the
12058compiler-dependent header, the function name is saved on the CPU stack
12059(one
12060pointer per function.) This mechanism is used because apparently there
12061exists no standard ANSI-C defined macro that that returns the function
12062name.
12063
12064Redesigned and reimplemented the "Owner ID" mechanism used to track
12065namespace objects created/deleted by ACPI tables and control method
12066execution. A bitmap is now used to allocate and free the IDs, thus
12067solving
12068the wraparound problem present in the previous implementation. The size
12069of
12070the namespace node descriptor was reduced by 2 bytes as a result (Alexey
12071Starikovskiy).
12072
12073Removed the UINT32_BIT and UINT16_BIT types that were used for the
12074bitfield
12075flag definitions within the headers for the predefined ACPI tables. These
12076have been replaced by UINT8_BIT in order to increase the code portability
12077of
12078the subsystem. If the use of UINT8 remains a problem, we may be forced to
12079eliminate bitfields entirely because of a lack of portability.
12080
12081Enhanced the performance of the AcpiUtUpdateObjectReference procedure.
12082This
12083is a frequently used function and this improvement increases the
12084performance
12085of the entire subsystem (Alexey Starikovskiy).
12086
12087Fixed several possible memory leaks and the inverse - premature object
12088deletion (Alexey Starikovskiy).
12089
12090Code and Data Size: Current and previous core subsystem library sizes are
12091shown below. These are the code and data sizes for the acpica.lib
12092produced
12093by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12094any ACPI driver or OSPM code. The debug version of the code includes the
12095debug output trace mechanism and has a much larger code and data size.
12096Note
12097that these values will vary depending on the efficiency of the compiler
12098and
12099the compiler options used during generation.
12100
12101  Previous Release:
12102    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
12103    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
12104  Current Release:
12105    Non-Debug Version:  78.6K Code, 11.6K Data,  90.2K Total
12106    Debug Version:     170.0K Code, 69.7K Data, 239.7K Total
12107
12108----------------------------------------
1210924 June 2005.  Summary of changes for version 20050624:
12110
121111) ACPI CA Core Subsystem:
12112
12113Modified the new OSL cache interfaces to use ACPI_CACHE_T as the type for
12114the host-defined cache object. This allows the OSL implementation to
12115define
12116and type this object in any manner desired, simplifying the OSL
12117implementation. For example, ACPI_CACHE_T is defined as kmem_cache_t for
12118Linux, and should be defined in the OS-specific header file for other
12119operating systems as required.
12120
12121Changed the interface to AcpiOsAcquireObject to directly return the
12122requested object as the function return (instead of ACPI_STATUS.) This
12123change was made for performance reasons, since this is the purpose of the
12124interface in the first place. AcpiOsAcquireObject is now similar to the
12125AcpiOsAllocate interface.
12126
12127Implemented a new AML debugger command named Businfo. This command
12128displays
12129information about all devices that have an associate _PRT object. The
12130_ADR,
12131_HID, _UID, and _CID are displayed for these devices.
12132
12133Modified the initialization sequence in AcpiInitializeSubsystem to call
12134the
12135OSL interface AcpiOslInitialize first, before any local initialization.
12136This
12137change was required because the global initialization now calls OSL
12138interfaces.
12139
12140Enhanced the Dump command to display the entire contents of Package
12141objects
12142(including all sub-objects and their values.)
12143
12144Restructured the code base to split some files because of size and/or
12145because the code logically belonged in a separate file. New files are
12146listed
12147below. All makefiles and project files included in the ACPI CA release
12148have
12149been updated.
12150    utilities/utcache.c           /* Local cache interfaces */
12151    utilities/utmutex.c           /* Local mutex support */
12152    utilities/utstate.c           /* State object support */
12153    interpreter/parser/psloop.c   /* Main AML parse loop */
12154
12155Code and Data Size: Current and previous core subsystem library sizes are
12156shown below. These are the code and data sizes for the acpica.lib
12157produced
12158by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12159any ACPI driver or OSPM code. The debug version of the code includes the
12160debug output trace mechanism and has a much larger code and data size.
12161Note
12162that these values will vary depending on the efficiency of the compiler
12163and
12164the compiler options used during generation.
12165
12166  Previous Release:
12167    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
12168    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
12169  Current Release:
12170    Non-Debug Version:  78.6K Code, 11.5K Data,  90.1K Total
12171    Debug Version:     165.2K Code, 69.6K Data, 234.8K Total
12172
12173
121742) iASL Compiler/Disassembler:
12175
12176Fixed a regression introduced in version 20050513 where the use of a
12177Package
12178object within a Case() statement caused a compile time exception. The
12179original behavior has been restored (a Match() operator is emitted.)
12180
12181----------------------------------------
1218217 June 2005.  Summary of changes for version 20050617:
12183
121841) ACPI CA Core Subsystem:
12185
12186Moved the object cache operations into the OS interface layer (OSL) to
12187allow
12188the host OS to handle these operations if desired (for example, the Linux
12189OSL will invoke the slab allocator). This support is optional; the
12190compile
12191time define ACPI_USE_LOCAL_CACHE may be used to utilize the original
12192cache
12193code in the ACPI CA core. The new OSL interfaces are shown below. See
12194utalloc.c for an example implementation, and acpiosxf.h for the exact
12195interface definitions. With assistance from Alexey Starikovskiy.
12196    AcpiOsCreateCache
12197    AcpiOsDeleteCache
12198    AcpiOsPurgeCache
12199    AcpiOsAcquireObject
12200    AcpiOsReleaseObject
12201
12202Modified the interfaces to AcpiOsAcquireLock and AcpiOsReleaseLock to
12203return
12204and restore a flags parameter. This fits better with many OS lock models.
12205Note: the current execution state (interrupt handler or not) is no longer
12206passed to these interfaces. If necessary, the OSL must determine this
12207state
12208by itself, a simple and fast operation. With assistance from Alexey
12209Starikovskiy.
12210
12211Fixed a problem in the ACPI table handling where a valid XSDT was assumed
12212present if the revision of the RSDP was 2 or greater. According to the
12213ACPI
12214specification, the XSDT is optional in all cases, and the table manager
12215therefore now checks for both an RSDP >=2 and a valid XSDT pointer.
12216Otherwise, the RSDT pointer is used. Some ACPI 2.0 compliant BIOSs
12217contain
12218only the RSDT.
12219
12220Fixed an interpreter problem with the Mid() operator in the case of an
12221input
12222string where the resulting output string is of zero length. It now
12223correctly
12224returns a valid, null terminated string object instead of a string object
12225with a null pointer.
12226
12227Fixed a problem with the control method argument handling to allow a
12228store
12229to an Arg object that already contains an object of type Device. The
12230Device
12231object is now correctly overwritten. Previously, an error was returned.
12232
12233
12234Enhanced the debugger Find command to emit object values in addition to
12235the
12236found object pathnames. The output format is the same as the dump
12237namespace
12238command.
12239
12240Enhanced the debugger Set command. It now has the ability to set the
12241value
12242of any Named integer object in the namespace (Previously, only method
12243locals
12244and args could be set.)
12245
12246Code and Data Size: Current and previous core subsystem library sizes are
12247shown below. These are the code and data sizes for the acpica.lib
12248produced
12249by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12250any ACPI driver or OSPM code. The debug version of the code includes the
12251debug output trace mechanism and has a much larger code and data size.
12252Note
12253that these values will vary depending on the efficiency of the compiler
12254and
12255the compiler options used during generation.
12256
12257  Previous Release:
12258    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
12259    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
12260  Current Release:
12261    Non-Debug Version:  78.3K Code, 11.6K Data,  89.9K Total
12262    Debug Version:     164.0K Code, 69.1K Data, 233.1K Total
12263
12264
122652) iASL Compiler/Disassembler:
12266
12267Fixed a regression in the disassembler where if/else/while constructs
12268were
12269output incorrectly. This problem was introduced in the previous release
12270(20050526). This problem also affected the single-step disassembly in the
12271debugger.
12272
12273Fixed a problem where compiling the reserved _OSI method would randomly
12274(but
12275rarely) produce compile errors.
12276
12277Enhanced the disassembler to emit compilable code in the face of
12278incorrect
12279AML resource descriptors. If the optional ResourceSourceIndex is present,
12280but the ResourceSource is not, do not emit the ResourceSourceIndex in the
12281disassembly. Otherwise, the resulting code cannot be compiled without
12282errors.
12283
12284----------------------------------------
1228526 May 2005.  Summary of changes for version 20050526:
12286
122871) ACPI CA Core Subsystem:
12288
12289Implemented support to execute Type 1 and Type 2 AML opcodes appearing at
12290the module level (not within a control method.) These opcodes are
12291executed
12292exactly once at the time the table is loaded. This type of code was legal
12293up
12294until the release of ACPI 2.0B (2002) and is now supported within ACPI CA
12295in
12296order to provide backwards compatibility with earlier BIOS
12297implementations.
12298This eliminates the "Encountered executable code at module level" warning
12299that was previously generated upon detection of such code.
12300
12301Fixed a problem in the interpreter where an AE_NOT_FOUND exception could
12302inadvertently be generated during the lookup of namespace objects in the
12303second pass parse of ACPI tables and control methods. It appears that
12304this
12305problem could occur during the resolution of forward references to
12306namespace
12307objects.
12308
12309Added the ACPI_MUTEX_DEBUG #ifdef to the AcpiUtReleaseMutex function,
12310corresponding to the same #ifdef in the AcpiUtAcquireMutex function. This
12311allows the deadlock detection debug code to be compiled out in the normal
12312case, improving mutex performance (and overall subsystem performance)
12313considerably.
12314
12315Implemented a handful of miscellaneous fixes for possible memory leaks on
12316error conditions and error handling control paths. These fixes were
12317suggested by FreeBSD and the Coverity Prevent source code analysis tool.
12318
12319Added a check for a null RSDT pointer in AcpiGetFirmwareTable
12320(tbxfroot.c)
12321to prevent a fault in this error case.
12322
12323Code and Data Size: Current and previous core subsystem library sizes are
12324shown below. These are the code and data sizes for the acpica.lib
12325produced
12326by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12327any ACPI driver or OSPM code. The debug version of the code includes the
12328debug output trace mechanism and has a much larger code and data size.
12329Note
12330that these values will vary depending on the efficiency of the compiler
12331and
12332the compiler options used during generation.
12333
12334  Previous Release:
12335    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
12336    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
12337  Current Release:
12338    Non-Debug Version:  78.1K Code, 11.6K Data,  89.7K Total
12339    Debug Version:     164.0K Code, 69.3K Data, 233.3K Total
12340
12341
123422) iASL Compiler/Disassembler:
12343
12344Implemented support to allow Type 1 and Type 2 ASL operators to appear at
12345the module level (not within a control method.) These operators will be
12346executed once at the time the table is loaded. This type of code was
12347legal
12348up until the release of ACPI 2.0B (2002) and is now supported by the iASL
12349compiler in order to provide backwards compatibility with earlier BIOS
12350ASL
12351code.
12352
12353The ACPI integer width (specified via the table revision ID or the -r
12354override, 32 or 64 bits) is now used internally during compile-time
12355constant
12356folding to ensure that constants are truncated to 32 bits if necessary.
12357Previously, the revision ID value was only emitted in the AML table
12358header.
12359
12360An error message is now generated for the Mutex and Method operators if
12361the
12362SyncLevel parameter is outside the legal range of 0 through 15.
12363
12364Fixed a problem with the Method operator ParameterTypes list handling
12365(ACPI
123663.0). Previously, more than 2 types or 2 arguments generated a syntax
12367error.
12368The actual underlying implementation of method argument typechecking is
12369still under development, however.
12370
12371----------------------------------------
1237213 May 2005.  Summary of changes for version 20050513:
12373
123741) ACPI CA Core Subsystem:
12375
12376Implemented support for PCI Express root bridges -- added support for
12377device
12378PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup.
12379
12380The interpreter now automatically truncates incoming 64-bit constants to
1238132
12382bits if currently executing out of a 32-bit ACPI table (Revision < 2).
12383This
12384also affects the iASL compiler constant folding. (Note: as per below, the
12385iASL compiler no longer allows 64-bit constants within 32-bit tables.)
12386
12387Fixed a problem where string and buffer objects with "static" pointers
12388(pointers to initialization data within an ACPI table) were not handled
12389consistently. The internal object copy operation now always copies the
12390data
12391to a newly allocated buffer, regardless of whether the source object is
12392static or not.
12393
12394Fixed a problem with the FromBCD operator where an implicit result
12395conversion was improperly performed while storing the result to the
12396target
12397operand. Since this is an "explicit conversion" operator, the implicit
12398conversion should never be performed on the output.
12399
12400Fixed a problem with the CopyObject operator where a copy to an existing
12401named object did not always completely overwrite the existing object
12402stored
12403at name. Specifically, a buffer-to-buffer copy did not delete the
12404existing
12405buffer.
12406
12407Replaced "InterruptLevel" with "InterruptNumber" in all GPE interfaces
12408and
12409structs for consistency.
12410
12411Code and Data Size: Current and previous core subsystem library sizes are
12412shown below. These are the code and data sizes for the acpica.lib
12413produced
12414by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12415any ACPI driver or OSPM code. The debug version of the code includes the
12416debug output trace mechanism and has a much larger code and data size.
12417Note
12418that these values will vary depending on the efficiency of the compiler
12419and
12420the compiler options used during generation.
12421
12422  Previous Release:
12423    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
12424    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
12425  Current Release: (Same sizes)
12426    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
12427    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
12428
12429
124302) iASL Compiler/Disassembler:
12431
12432The compiler now emits a warning if an attempt is made to generate a 64-
12433bit
12434integer constant from within a 32-bit ACPI table (Revision < 2). The
12435integer
12436is truncated to 32 bits.
12437
12438Fixed a problem with large package objects: if the static length of the
12439package is greater than 255, the "variable length package" opcode is
12440emitted. Previously, this caused an error. This requires an update to the
12441ACPI spec, since it currently (incorrectly) states that packages larger
12442than
12443255 elements are not allowed.
12444
12445The disassembler now correctly handles variable length packages and
12446packages
12447larger than 255 elements.
12448
12449----------------------------------------
1245008 April 2005.  Summary of changes for version 20050408:
12451
124521) ACPI CA Core Subsystem:
12453
12454Fixed three cases in the interpreter where an "index" argument to an ASL
12455function was still (internally) 32 bits instead of the required 64 bits.
12456This was the Index argument to the Index, Mid, and Match operators.
12457
12458The "strupr" function is now permanently local (AcpiUtStrupr), since this
12459is
12460not a POSIX-defined function and not present in most kernel-level C
12461libraries. All references to the C library strupr function have been
12462removed
12463from the headers.
12464
12465Completed the deployment of static functions/prototypes. All prototypes
12466with
12467the static attribute have been moved from the headers to the owning C
12468file.
12469
12470Implemented an extract option (-e) for the AcpiBin utility (AML binary
12471utility). This option allows the utility to extract individual ACPI
12472tables
12473from the output of AcpiDmp. It provides the same functionality of the
12474acpixtract.pl perl script without the worry of setting the correct perl
12475options. AcpiBin runs on Windows and has not yet been generated/validated
12476in
12477the Linux/Unix environment (but should be soon).
12478
12479Updated and fixed the table dump option for AcpiBin (-d). This option
12480converts a single ACPI table to a hex/ascii file, similar to the output
12481of
12482AcpiDmp.
12483
12484Code and Data Size: Current and previous core subsystem library sizes are
12485shown below. These are the code and data sizes for the acpica.lib
12486produced
12487by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12488any ACPI driver or OSPM code. The debug version of the code includes the
12489debug output trace mechanism and has a much larger code and data size.
12490Note
12491that these values will vary depending on the efficiency of the compiler
12492and
12493the compiler options used during generation.
12494
12495  Previous Release:
12496    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
12497    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
12498  Current Release:
12499    Non-Debug Version:  78.2K Code, 11.6K Data,  89.8K Total
12500    Debug Version:     163.7K Code, 69.3K Data, 233.0K Total
12501
12502
125032) iASL Compiler/Disassembler:
12504
12505Disassembler fix: Added a check to ensure that the table length found in
12506the
12507ACPI table header within the input file is not longer than the actual
12508input
12509file size. This indicates some kind of file or table corruption.
12510
12511----------------------------------------
1251229 March 2005.  Summary of changes for version 20050329:
12513
125141) ACPI CA Core Subsystem:
12515
12516An error is now generated if an attempt is made to create a Buffer Field
12517of
12518length zero (A CreateField with a length operand of zero.)
12519
12520The interpreter now issues a warning whenever executable code at the
12521module
12522level is detected during ACPI table load. This will give some idea of the
12523prevalence of this type of code.
12524
12525Implemented support for references to named objects (other than control
12526methods) within package objects.
12527
12528Enhanced package object output for the debug object. Package objects are
12529now
12530completely dumped, showing all elements.
12531
12532Enhanced miscellaneous object output for the debug object. Any object can
12533now be written to the debug object (for example, a device object can be
12534written, and the type of the object will be displayed.)
12535
12536The "static" qualifier has been added to all local functions across both
12537the
12538core subsystem and the iASL compiler.
12539
12540The number of "long" lines (> 80 chars) within the source has been
12541significantly reduced, by about 1/3.
12542
12543Cleaned up all header files to ensure that all CA/iASL functions are
12544prototyped (even static functions) and the formatting is consistent.
12545
12546Two new header files have been added, acopcode.h and acnames.h.
12547
12548Removed several obsolete functions that were no longer used.
12549
12550Code and Data Size: Current and previous core subsystem library sizes are
12551shown below. These are the code and data sizes for the acpica.lib
12552produced
12553by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12554any ACPI driver or OSPM code. The debug version of the code includes the
12555debug output trace mechanism and has a much larger code and data size.
12556Note
12557that these values will vary depending on the efficiency of the compiler
12558and
12559the compiler options used during generation.
12560
12561  Previous Release:
12562    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
12563    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
12564  Current Release:
12565    Non-Debug Version:  78.0K Code, 11.6K Data,  89.6K Total
12566    Debug Version:     163.5K Code, 69.3K Data, 232.8K Total
12567
12568
12569
125702) iASL Compiler/Disassembler:
12571
12572Fixed a problem with the resource descriptor generation/support. For the
12573ResourceSourceIndex and the ResourceSource fields, both must be present,
12574or
12575both must be not present - can't have one without the other.
12576
12577The compiler now returns non-zero from the main procedure if any errors
12578have
12579occurred during the compilation.
12580
12581
12582----------------------------------------
1258309 March 2005.  Summary of changes for version 20050309:
12584
125851) ACPI CA Core Subsystem:
12586
12587The string-to-buffer implicit conversion code has been modified again
12588after
12589a change to the ACPI specification.  In order to match the behavior of
12590the
12591other major ACPI implementation, the target buffer is no longer truncated
12592if
12593the source string is smaller than an existing target buffer. This change
12594requires an update to the ACPI spec, and should eliminate the recent
12595AE_AML_BUFFER_LIMIT issues.
12596
12597The "implicit return" support was rewritten to a new algorithm that
12598solves
12599the general case. Rather than attempt to determine when a method is about
12600to
12601exit, the result of every ASL operator is saved momentarily until the
12602very
12603next ASL operator is executed. Therefore, no matter how the method exits,
12604there will always be a saved implicit return value. This feature is only
12605enabled with the AcpiGbl_EnableInterpreterSlack flag, and should
12606eliminate
12607AE_AML_NO_RETURN_VALUE errors when enabled.
12608
12609Implemented implicit conversion support for the predicate (operand) of
12610the
12611If, Else, and While operators. String and Buffer arguments are
12612automatically
12613converted to Integers.
12614
12615Changed the string-to-integer conversion behavior to match the new ACPI
12616errata: "If no integer object exists, a new integer is created. The ASCII
12617string is interpreted as a hexadecimal constant. Each string character is
12618interpreted as a hexadecimal value ('0'-'9', 'A'-'F', 'a', 'f'), starting
12619with the first character as the most significant digit, and ending with
12620the
12621first non-hexadecimal character or end-of-string." This means that the
12622first
12623non-hex character terminates the conversion and this is the code that was
12624changed.
12625
12626Fixed a problem where the ObjectType operator would fail (fault) when
12627used
12628on an Index of a Package which pointed to a null package element. The
12629operator now properly returns zero (Uninitialized) in this case.
12630
12631Fixed a problem where the While operator used excessive memory by not
12632properly popping the result stack during execution. There was no memory
12633leak
12634after execution, however. (Code provided by Valery Podrezov.)
12635
12636Fixed a problem where references to control methods within Package
12637objects
12638caused the method to be invoked, instead of producing a reference object
12639pointing to the method.
12640
12641Restructured and simplified the pswalk.c module (AcpiPsDeleteParseTree)
12642to
12643improve performance and reduce code size. (Code provided by Alexey
12644Starikovskiy.)
12645
12646Code and Data Size: Current and previous core subsystem library sizes are
12647shown below. These are the code and data sizes for the acpica.lib
12648produced
12649by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12650any ACPI driver or OSPM code. The debug version of the code includes the
12651debug output trace mechanism and has a much larger code and data size.
12652Note
12653that these values will vary depending on the efficiency of the compiler
12654and
12655the compiler options used during generation.
12656
12657  Previous Release:
12658    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
12659    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
12660  Current Release:
12661    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
12662    Debug Version:     165.4K Code, 69.7K Data, 236.1K Total
12663
12664
126652) iASL Compiler/Disassembler:
12666
12667Fixed a problem with the Return operator with no arguments. Since the AML
12668grammar for the byte encoding requires an operand for the Return opcode,
12669the
12670compiler now emits a Return(Zero) for this case.  An ACPI specification
12671update has been written for this case.
12672
12673For tables other than the DSDT, namepath optimization is automatically
12674disabled. This is because SSDTs can be loaded anywhere in the namespace,
12675the
12676compiler has no knowledge of where, and thus cannot optimize namepaths.
12677
12678Added "ProcessorObj" to the ObjectTypeKeyword list. This object type was
12679inadvertently omitted from the ACPI specification, and will require an
12680update to the spec.
12681
12682The source file scan for ASCII characters is now optional (-a). This
12683change
12684was made because some vendors place non-ascii characters within comments.
12685However, the scan is simply a brute-force byte compare to ensure all
12686characters in the file are in the range 0x00 to 0x7F.
12687
12688Fixed a problem with the CondRefOf operator where the compiler was
12689inappropriately checking for the existence of the target. Since the point
12690of
12691the operator is to check for the existence of the target at run-time, the
12692compiler no longer checks for the target existence.
12693
12694Fixed a problem where errors generated from the internal AML interpreter
12695during constant folding were not handled properly, causing a fault.
12696
12697Fixed a problem with overly aggressive range checking for the Stall
12698operator. The valid range (max 255) is now only checked if the operand is
12699of
12700type Integer. All other operand types cannot be statically checked.
12701
12702Fixed a problem where control method references within the RefOf,
12703DeRefOf,
12704and ObjectType operators were not treated properly. They are now treated
12705as
12706actual references, not method invocations.
12707
12708Fixed and enhanced the "list namespace" option (-ln). This option was
12709broken
12710a number of releases ago.
12711
12712Improved error handling for the Field, IndexField, and BankField
12713operators.
12714The compiler now cleanly reports and recovers from errors in the field
12715component (FieldUnit) list.
12716
12717Fixed a disassembler problem where the optional ResourceDescriptor fields
12718TRS and TTP were not always handled correctly.
12719
12720Disassembler - Comments in output now use "//" instead of "/*"
12721
12722----------------------------------------
1272328 February 2005.  Summary of changes for version 20050228:
12724
127251) ACPI CA Core Subsystem:
12726
12727Fixed a problem where the result of an Index() operator (an object
12728reference) must increment the reference count on the target object for
12729the
12730life of the object reference.
12731
12732Implemented AML Interpreter and Debugger support for the new ACPI 3.0
12733Extended Address (IO, Memory, Space), QwordSpace, DwordSpace, and
12734WordSpace
12735resource descriptors.
12736
12737Implemented support in the _OSI method for the ACPI 3.0 "Extended Address
12738Space Descriptor" string, indicating interpreter support for the
12739descriptors
12740above.
12741
12742Implemented header support for the new ACPI 3.0 FADT flag bits.
12743
12744Implemented header support for the new ACPI 3.0 PCI Express bits for the
12745PM1
12746status/enable registers.
12747
12748Updated header support for the MADT processor local Apic struct and MADT
12749platform interrupt source struct for new ACPI 3.0 fields.
12750
12751Implemented header support for the SRAT and SLIT ACPI tables.
12752
12753Implemented the -s switch in AcpiExec to enable the "InterpreterSlack"
12754flag
12755at runtime.
12756
12757Code and Data Size: Current and previous core subsystem library sizes are
12758shown below. These are the code and data sizes for the acpica.lib
12759produced
12760by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12761any ACPI driver or OSPM code. The debug version of the code includes the
12762debug output trace mechanism and has a much larger code and data size.
12763Note
12764that these values will vary depending on the efficiency of the compiler
12765and
12766the compiler options used during generation.
12767
12768  Previous Release:
12769    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
12770    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
12771  Current Release:
12772    Non-Debug Version:  78.3K Code, 11.5K Data,  89.8K Total
12773    Debug Version:     165.4K Code, 69.6K Data, 236.0K Total
12774
12775
127762) iASL Compiler/Disassembler:
12777
12778Fixed a problem with the internal 64-bit String-to-integer conversion
12779with
12780strings less than two characters long.
12781
12782Fixed a problem with constant folding where the result of the Index()
12783operator can not be considered a constant. This means that Index() cannot
12784be
12785a type3 opcode and this will require an update to the ACPI specification.
12786
12787Disassembler: Implemented support for the TTP, MTP, and TRS resource
12788descriptor fields. These fields were inadvertently ignored and not output
12789in
12790the disassembly of the resource descriptor.
12791
12792
12793 ----------------------------------------
1279411 February 2005.  Summary of changes for version 20050211:
12795
127961) ACPI CA Core Subsystem:
12797
12798Implemented ACPI 3.0 support for implicit conversion within the Match()
12799operator. MatchObjects can now be of type integer, buffer, or string
12800instead
12801of just type integer.  Package elements are implicitly converted to the
12802type
12803of the MatchObject. This change aligns the behavior of Match() with the
12804behavior of the other logical operators (LLess(), etc.) It also requires
12805an
12806errata change to the ACPI specification as this support was intended for
12807ACPI 3.0, but was inadvertently omitted.
12808
12809Fixed a problem with the internal implicit "to buffer" conversion.
12810Strings
12811that are converted to buffers will cause buffer truncation if the string
12812is
12813smaller than the target buffer. Integers that are converted to buffers
12814will
12815not cause buffer truncation, only zero extension (both as per the ACPI
12816spec.) The problem was introduced when code was added to truncate the
12817buffer, but this should not be performed in all cases, only the string
12818case.
12819
12820Fixed a problem with the Buffer and Package operators where the
12821interpreter
12822would get confused if two such operators were used as operands to an ASL
12823operator (such as LLess(Buffer(1){0},Buffer(1){1}). The internal result
12824stack was not being popped after the execution of these operators,
12825resulting
12826in an AE_NO_RETURN_VALUE exception.
12827
12828Fixed a problem with constructs of the form Store(Index(...),...). The
12829reference object returned from Index was inadvertently resolved to an
12830actual
12831value. This problem was introduced in version 20050114 when the behavior
12832of
12833Store() was modified to restrict the object types that can be used as the
12834source operand (to match the ACPI specification.)
12835
12836Reduced excessive stack use within the AcpiGetObjectInfo procedure.
12837
12838Added a fix to aclinux.h to allow generation of AcpiExec on Linux.
12839
12840Updated the AcpiSrc utility to add the FADT_DESCRIPTOR_REV2_MINUS struct.
12841
12842Code and Data Size: Current and previous core subsystem library sizes are
12843shown below. These are the code and data sizes for the acpica.lib
12844produced
12845by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12846any ACPI driver or OSPM code. The debug version of the code includes the
12847debug output trace mechanism and has a much larger code and data size.
12848Note
12849that these values will vary depending on the efficiency of the compiler
12850and
12851the compiler options used during generation.
12852
12853  Previous Release:
12854    Non-Debug Version:  78.1K Code, 11.5K Data,  89.6K Total
12855    Debug Version:     164.8K Code, 69.2K Data, 234.0K Total
12856  Current Release:
12857    Non-Debug Version:  78.2K Code, 11.5K Data,  89.7K Total
12858    Debug Version:     164.9K Code, 69.2K Data, 234.1K Total
12859
12860
128612) iASL Compiler/Disassembler:
12862
12863Fixed a code generation problem in the constant folding optimization code
12864where incorrect code was generated if a constant was reduced to a buffer
12865object (i.e., a reduced type 5 opcode.)
12866
12867Fixed a typechecking problem for the ToBuffer operator. Caused by an
12868incorrect return type in the internal opcode information table.
12869
12870----------------------------------------
1287125 January 2005.  Summary of changes for version 20050125:
12872
128731) ACPI CA Core Subsystem:
12874
12875Fixed a recently introduced problem with the Global Lock where the
12876underlying semaphore was not created.  This problem was introduced in
12877version 20050114, and caused an AE_AML_NO_OPERAND exception during an
12878Acquire() operation on _GL.
12879
12880The local object cache is now optional, and is disabled by default. Both
12881AcpiExec and the iASL compiler enable the cache because they run in user
12882mode and this enhances their performance. #define
12883ACPI_ENABLE_OBJECT_CACHE
12884to enable the local cache.
12885
12886Fixed an issue in the internal function AcpiUtEvaluateObject concerning
12887the
12888optional "implicit return" support where an error was returned if no
12889return
12890object was expected, but one was implicitly returned. AE_OK is now
12891returned
12892in this case and the implicitly returned object is deleted.
12893AcpiUtEvaluateObject is only occasionally used, and only to execute
12894reserved
12895methods such as _STA and _INI where the return type is known up front.
12896
12897Fixed a few issues with the internal convert-to-integer code. It now
12898returns
12899an error if an attempt is made to convert a null string, a string of only
12900blanks/tabs, or a zero-length buffer. This affects both implicit
12901conversion
12902and explicit conversion via the ToInteger() operator.
12903
12904The internal debug code in AcpiUtAcquireMutex has been commented out. It
12905is
12906not needed for normal operation and should increase the performance of
12907the
12908entire subsystem. The code remains in case it is needed for debug
12909purposes
12910again.
12911
12912The AcpiExec source and makefile are included in the Unix/Linux package
12913for
12914the first time.
12915
12916Code and Data Size: Current and previous core subsystem library sizes are
12917shown below. These are the code and data sizes for the acpica.lib
12918produced
12919by the Microsoft Visual C++ 6.0 compiler, and these values do not include
12920any ACPI driver or OSPM code. The debug version of the code includes the
12921debug output trace mechanism and has a much larger code and data size.
12922Note
12923that these values will vary depending on the efficiency of the compiler
12924and
12925the compiler options used during generation.
12926
12927  Previous Release:
12928    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
12929    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
12930  Current Release:
12931    Non-Debug Version:  78.1K Code,  11.5K Data,   89.6K Total
12932    Debug Version:     164.8K Code,  69.2K Data,  234.0K Total
12933
129342) iASL Compiler/Disassembler:
12935
12936Switch/Case support: A warning is now issued if the type of the Switch
12937value
12938cannot be determined at compile time. For example, Switch(Arg0) will
12939generate the warning, and the type is assumed to be an integer. As per
12940the
12941ACPI spec, use a construct such as Switch(ToInteger(Arg0)) to eliminate
12942the
12943warning.
12944
12945Switch/Case support: Implemented support for buffer and string objects as
12946the switch value.  This is an ACPI 3.0 feature, now that LEqual supports
12947buffers and strings.
12948
12949Switch/Case support: The emitted code for the LEqual() comparisons now
12950uses
12951the switch value as the first operand, not the second. The case value is
12952now
12953the second operand, and this allows the case value to be implicitly
12954converted to the type of the switch value, not the other way around.
12955
12956Switch/Case support: Temporary variables are now emitted immediately
12957within
12958the control method, not at the global level. This means that there are
12959now
1296036 temps available per-method, not 36 temps per-module as was the case
12961with
12962the earlier implementation (_T_0 through _T_9 and _T_A through _T_Z.)
12963
12964----------------------------------------
1296514 January 2005.  Summary of changes for version 20050114:
12966
12967Added 2005 copyright to all module headers.  This affects every module in
12968the core subsystem, iASL compiler, and the utilities.
12969
129701) ACPI CA Core Subsystem:
12971
12972Fixed an issue with the String-to-Buffer conversion code where the string
12973null terminator was not included in the buffer after conversion, but
12974there
12975is existing ASL that assumes the string null terminator is included. This
12976is
12977the root of the ACPI_AML_BUFFER_LIMIT regression. This problem was
12978introduced in the previous version when the code was updated to correctly
12979set the converted buffer size as per the ACPI specification. The ACPI
12980spec
12981is ambiguous and will be updated to specify that the null terminator must
12982be
12983included in the converted buffer. This also affects the ToBuffer() ASL
12984operator.
12985
12986Fixed a problem with the Mid() ASL/AML operator where it did not work
12987correctly on Buffer objects. Newly created sub-buffers were not being
12988marked
12989as initialized.
12990
12991
12992Fixed a problem in AcpiTbFindTable where incorrect string compares were
12993performed on the OemId and OemTableId table header fields.  These fields
12994are
12995not null terminated, so strncmp is now used instead of strcmp.
12996
12997Implemented a restriction on the Store() ASL/AML operator to align the
12998behavior with the ACPI specification.  Previously, any object could be
12999used
13000as the source operand.  Now, the only objects that may be used are
13001Integers,
13002Buffers, Strings, Packages, Object References, and DDB Handles.  If
13003necessary, the original behavior can be restored by enabling the
13004EnableInterpreterSlack flag.
13005
13006Enhanced the optional "implicit return" support to allow an implicit
13007return
13008value from methods that are invoked externally via the AcpiEvaluateObject
13009interface.  This enables implicit returns from the _STA and _INI methods,
13010for example.
13011
13012Changed the Revision() ASL/AML operator to return the current version of
13013the
13014AML interpreter, in the YYYYMMDD format. Previously, it incorrectly
13015returned
13016the supported ACPI version (This is the function of the _REV method).
13017
13018Updated the _REV predefined method to return the currently supported
13019version
13020of ACPI, now 3.
13021
13022Implemented batch mode option for the AcpiExec utility (-b).
13023
13024Code and Data Size: Current and previous core subsystem library sizes are
13025shown below. These are the code and data sizes for the acpica.lib
13026produced
13027by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13028any ACPI driver or OSPM code. The debug version of the code includes the
13029debug output trace mechanism and has a much larger code and data size.
13030Note
13031that these values will vary depending on the efficiency of the compiler
13032and
13033the compiler options used during generation.
13034
13035  Previous Release:
13036    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
13037    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
13038  Current Release:
13039    Non-Debug Version:  78.4K Code,  11.5K Data,   89.9K Total
13040    Debug Version:     165.4K Code,  69.4K Data,  234.8K Total
13041
13042----------------------------------------
1304310 December 2004.  Summary of changes for version 20041210:
13044
13045ACPI 3.0 support is nearing completion in both the iASL compiler and the
13046ACPI CA core subsystem.
13047
130481) ACPI CA Core Subsystem:
13049
13050Fixed a problem in the ToDecimalString operator where the resulting
13051string
13052length was incorrectly calculated. The length is now calculated exactly,
13053eliminating incorrect AE_STRING_LIMIT exceptions.
13054
13055Fixed a problem in the ToHexString operator to allow a maximum 200
13056character
13057string to be produced.
13058
13059Fixed a problem in the internal string-to-buffer and buffer-to-buffer
13060copy
13061routine where the length of the resulting buffer was not truncated to the
13062new size (if the target buffer already existed).
13063
13064Code and Data Size: Current and previous core subsystem library sizes are
13065shown below. These are the code and data sizes for the acpica.lib
13066produced
13067by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13068any ACPI driver or OSPM code. The debug version of the code includes the
13069debug output trace mechanism and has a much larger code and data size.
13070Note
13071that these values will vary depending on the efficiency of the compiler
13072and
13073the compiler options used during generation.
13074
13075  Previous Release:
13076    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
13077    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
13078  Current Release:
13079    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
13080    Debug Version:     165.3K Code,  69.4K Data,  234.7K Total
13081
13082
130832) iASL Compiler/Disassembler:
13084
13085Implemented the new ACPI 3.0 resource template macros - DWordSpace,
13086ExtendedIO, ExtendedMemory, ExtendedSpace, QWordSpace, and WordSpace.
13087Includes support in the disassembler.
13088
13089Implemented support for the new (ACPI 3.0) parameter to the Register
13090macro,
13091AccessSize.
13092
13093Fixed a problem where the _HE resource name for the Interrupt macro was
13094referencing bit 0 instead of bit 1.
13095
13096Implemented check for maximum 255 interrupts in the Interrupt macro.
13097
13098Fixed a problem with the predefined resource descriptor names where
13099incorrect AML code was generated if the offset within the resource buffer
13100was 0 or 1.  The optimizer shortened the AML code to a single byte opcode
13101but did not update the surrounding package lengths.
13102
13103Changes to the Dma macro:  All channels within the channel list must be
13104in
13105the range 0-7.  Maximum 8 channels can be specified. BusMaster operand is
13106optional (default is BusMaster).
13107
13108Implemented check for maximum 7 data bytes for the VendorShort macro.
13109
13110The ReadWrite parameter is now optional for the Memory32 and similar
13111macros.
13112
13113----------------------------------------
1311403 December 2004.  Summary of changes for version 20041203:
13115
131161) ACPI CA Core Subsystem:
13117
13118The low-level field insertion/extraction code (exfldio) has been
13119completely
13120rewritten to eliminate unnecessary complexity, bugs, and boundary
13121conditions.
13122
13123Fixed a problem in the ToInteger, ToBuffer, ToHexString, and
13124ToDecimalString
13125operators where the input operand could be inadvertently deleted if no
13126conversion was necessary (e.g., if the input to ToInteger was an Integer
13127object.)
13128
13129Fixed a problem with the ToDecimalString and ToHexString where an
13130incorrect
13131exception code was returned if the resulting string would be > 200 chars.
13132AE_STRING_LIMIT is now returned.
13133
13134Fixed a problem with the Concatenate operator where AE_OK was always
13135returned, even if the operation failed.
13136
13137Fixed a problem in oswinxf (used by AcpiExec and iASL) to allow > 128
13138semaphores to be allocated.
13139
13140Code and Data Size: Current and previous core subsystem library sizes are
13141shown below. These are the code and data sizes for the acpica.lib
13142produced
13143by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13144any ACPI driver or OSPM code. The debug version of the code includes the
13145debug output trace mechanism and has a much larger code and data size.
13146Note
13147that these values will vary depending on the efficiency of the compiler
13148and
13149the compiler options used during generation.
13150
13151  Previous Release:
13152    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
13153    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
13154  Current Release:
13155    Non-Debug Version:  78.3K Code,  11.5K Data,   89.8K Total
13156    Debug Version:     164.7K Code,  68.5K Data,  233.2K Total
13157
13158
131592) iASL Compiler/Disassembler:
13160
13161Fixed typechecking for the ObjectType and SizeOf operators.  Problem was
13162recently introduced in 20041119.
13163
13164Fixed a problem with the ToUUID macro where the upper nybble of each
13165buffer
13166byte was inadvertently set to zero.
13167
13168----------------------------------------
1316919 November 2004.  Summary of changes for version 20041119:
13170
131711) ACPI CA Core Subsystem:
13172
13173Fixed a problem in the internal ConvertToInteger routine where new
13174integers
13175were not truncated to 32 bits for 32-bit ACPI tables. This routine
13176converts
13177buffers and strings to integers.
13178
13179Implemented support to store a value to an Index() on a String object.
13180This
13181is an ACPI 2.0 feature that had not yet been implemented.
13182
13183Implemented new behavior for storing objects to individual package
13184elements
13185(via the Index() operator). The previous behavior was to invoke the
13186implicit
13187conversion rules if an object was already present at the index.  The new
13188behavior is to simply delete any existing object and directly store the
13189new
13190object. Although the ACPI specification seems unclear on this subject,
13191other
13192ACPI implementations behave in this manner.  (This is the root of the
13193AE_BAD_HEX_CONSTANT issue.)
13194
13195Modified the RSDP memory scan mechanism to support the extended checksum
13196for
13197ACPI 2.0 (and above) RSDPs. Note that the search continues until a valid
13198RSDP signature is found with a valid checksum.
13199
13200Code and Data Size: Current and previous core subsystem library sizes are
13201shown below. These are the code and data sizes for the acpica.lib
13202produced
13203by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13204any ACPI driver or OSPM code. The debug version of the code includes the
13205debug output trace mechanism and has a much larger code and data size.
13206Note
13207that these values will vary depending on the efficiency of the compiler
13208and
13209the compiler options used during generation.
13210
13211  Previous Release:
13212    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
13213    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
13214  Current Release:
13215    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
13216    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
13217
13218
132192) iASL Compiler/Disassembler:
13220
13221Fixed a missing semicolon in the aslcompiler.y file.
13222
13223----------------------------------------
1322405 November 2004.  Summary of changes for version 20041105:
13225
132261) ACPI CA Core Subsystem:
13227
13228Implemented support for FADT revision 2.  This was an interim table
13229(between
13230ACPI 1.0 and ACPI 2.0) that adds support for the FADT reset register.
13231
13232Implemented optional support to allow uninitialized LocalX and ArgX
13233variables in a control method.  The variables are initialized to an
13234Integer
13235object with a value of zero.  This support is enabled by setting the
13236AcpiGbl_EnableInterpreterSlack flag to TRUE.
13237
13238Implemented support for Integer objects for the SizeOf operator.  Either
132394
13240or 8 is returned, depending on the current integer size (32-bit or 64-
13241bit,
13242depending on the parent table revision).
13243
13244Fixed a problem in the implementation of the SizeOf and ObjectType
13245operators
13246where the operand was resolved to a value too early, causing incorrect
13247return values for some objects.
13248
13249Fixed some possible memory leaks during exceptional conditions.
13250
13251Code and Data Size: Current and previous core subsystem library sizes are
13252shown below. These are the code and data sizes for the acpica.lib
13253produced
13254by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13255any ACPI driver or OSPM code. The debug version of the code includes the
13256debug output trace mechanism and has a much larger code and data size.
13257Note
13258that these values will vary depending on the efficiency of the compiler
13259and
13260the compiler options used during generation.
13261
13262  Previous Release:
13263    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
13264    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
13265  Current Release:
13266    Non-Debug Version:  78.5K Code,  11.5K Data,   90.0K Total
13267    Debug Version:     165.2K Code,  68.6K Data,  233.8K Total
13268
13269
132702) iASL Compiler/Disassembler:
13271
13272Implemented support for all ACPI 3.0 reserved names and methods.
13273
13274Implemented all ACPI 3.0 grammar elements in the front-end, including
13275support for semicolons.
13276
13277Implemented the ACPI 3.0 Function() and ToUUID() macros
13278
13279Fixed a problem in the disassembler where a Scope() operator would not be
13280emitted properly if the target of the scope was in another table.
13281
13282----------------------------------------
1328315 October 2004.  Summary of changes for version 20041015:
13284
13285Note:  ACPI CA is currently undergoing an in-depth and complete formal
13286evaluation to test/verify the following areas. Other suggestions are
13287welcome. This will result in an increase in the frequency of releases and
13288the number of bug fixes in the next few months.
13289  - Functional tests for all ASL/AML operators
13290  - All implicit/explicit type conversions
13291  - Bit fields and operation regions
13292  - 64-bit math support and 32-bit-only "truncated" math support
13293  - Exceptional conditions, both compiler and interpreter
13294  - Dynamic object deletion and memory leaks
13295  - ACPI 3.0 support when implemented
13296  - External interfaces to the ACPI subsystem
13297
13298
132991) ACPI CA Core Subsystem:
13300
13301Fixed two alignment issues on 64-bit platforms - within debug statements
13302in
13303AcpiEvGpeDetect and AcpiEvCreateGpeBlock. Removed references to the
13304Address
13305field within the non-aligned ACPI generic address structure.
13306
13307Fixed a problem in the Increment and Decrement operators where incorrect
13308operand resolution could result in the inadvertent modification of the
13309original integer when the integer is passed into another method as an
13310argument and the arg is then incremented/decremented.
13311
13312Fixed a problem in the FromBCD operator where the upper 32-bits of a 64-
13313bit
13314BCD number were truncated during conversion.
13315
13316Fixed a problem in the ToDecimal operator where the length of the
13317resulting
13318string could be set incorrectly too long if the input operand was a
13319Buffer
13320object.
13321
13322Fixed a problem in the Logical operators (LLess, etc.) where a NULL byte
13323(0)
13324within a buffer would prematurely terminate a compare between buffer
13325objects.
13326
13327Added a check for string overflow (>200 characters as per the ACPI
13328specification) during the Concatenate operator with two string operands.
13329
13330Code and Data Size: Current and previous core subsystem library sizes are
13331shown below. These are the code and data sizes for the acpica.lib
13332produced
13333by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13334any ACPI driver or OSPM code. The debug version of the code includes the
13335debug output trace mechanism and has a much larger code and data size.
13336Note
13337that these values will vary depending on the efficiency of the compiler
13338and
13339the compiler options used during generation.
13340
13341  Previous Release:
13342    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
13343    Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
13344  Current Release:
13345    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
13346    Debug Version:     164.8K Code,  68.6K Data,  233.4K Total
13347
13348
13349
133502) iASL Compiler/Disassembler:
13351
13352Allow the use of the ObjectType operator on uninitialized Locals and Args
13353(returns 0 as per the ACPI specification).
13354
13355Fixed a problem where the compiler would fault if there was a syntax
13356error
13357in the FieldName of all of the various CreateXXXField operators.
13358
13359Disallow the use of lower case letters within the EISAID macro, as per
13360the
13361ACPI specification.  All EISAID strings must be of the form "UUUNNNN"
13362Where
13363U is an uppercase letter and N is a hex digit.
13364
13365
13366----------------------------------------
1336706 October 2004.  Summary of changes for version 20041006:
13368
133691) ACPI CA Core Subsystem:
13370
13371Implemented support for the ACPI 3.0 Timer operator. This ASL function
13372implements a 64-bit timer with 100 nanosecond granularity.
13373
13374Defined a new OSL interface, AcpiOsGetTimer. This interface is used to
13375implement the ACPI 3.0 Timer operator.  This allows the host OS to
13376implement
13377the timer with the best clock available. Also, it keeps the core
13378subsystem
13379out of the clock handling business, since the host OS (usually) performs
13380this function.
13381
13382Fixed an alignment issue on 64-bit platforms. The HwLowLevelRead(Write)
13383functions use a 64-bit address which is part of the packed ACPI Generic
13384Address Structure. Since the structure is non-aligned, the alignment
13385macros
13386are now used to extract the address to a local variable before use.
13387
13388Fixed a problem where the ToInteger operator assumed all input strings
13389were
13390hexadecimal. The operator now handles both decimal strings and hex
13391strings
13392(prefixed with "0x").
13393
13394Fixed a problem where the string length in the string object created as a
13395result of the internal ConvertToString procedure could be incorrect. This
13396potentially affected all implicit conversions and also the
13397ToDecimalString
13398and ToHexString operators.
13399
13400Fixed two problems in the ToString operator. If the length parameter was
13401zero, an incorrect string object was created and the value of the input
13402length parameter was inadvertently changed from zero to Ones.
13403
13404Fixed a problem where the optional ResourceSource string in the
13405ExtendedIRQ
13406resource macro was ignored.
13407
13408Simplified the interfaces to the internal division functions, reducing
13409code
13410size and complexity.
13411
13412Code and Data Size: Current and previous core subsystem library sizes are
13413shown below. These are the code and data sizes for the acpica.lib
13414produced
13415by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13416any ACPI driver or OSPM code. The debug version of the code includes the
13417debug output trace mechanism and has a much larger code and data size.
13418Note
13419that these values will vary depending on the efficiency of the compiler
13420and
13421the compiler options used during generation.
13422
13423  Previous Release:
13424    Non-Debug Version:  77.9K Code,  11.4K Data,   89.3K Total
13425    Debug Version:     164.5K Code,  68.3K Data,  232.8K Total
13426  Current Release:
13427    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
13428    Debug Version:     164.6K Code,  68.5K Data,  233.1K Total
13429
13430
134312) iASL Compiler/Disassembler:
13432
13433Implemented support for the ACPI 3.0 Timer operator.
13434
13435Fixed a problem where the Default() operator was inadvertently ignored in
13436a
13437Switch/Case block.  This was a problem in the translation of the Switch
13438statement to If...Else pairs.
13439
13440Added support to allow a standalone Return operator, with no parentheses
13441(or
13442operands).
13443
13444Fixed a problem with code generation for the ElseIf operator where the
13445translated Else...If parse tree was improperly constructed leading to the
13446loss of some code.
13447
13448----------------------------------------
1344922 September 2004.  Summary of changes for version 20040922:
13450
134511) ACPI CA Core Subsystem:
13452
13453Fixed a problem with the implementation of the LNot() operator where
13454"Ones"
13455was not returned for the TRUE case. Changed the code to return Ones
13456instead
13457of (!Arg) which was usually 1. This change affects iASL constant folding
13458for
13459this operator also.
13460
13461Fixed a problem in AcpiUtInitializeBuffer where an existing buffer was
13462not
13463initialized properly -- Now zero the entire buffer in this case where the
13464buffer already exists.
13465
13466Changed the interface to AcpiOsSleep from (UINT32 Seconds, UINT32
13467Milliseconds) to simply (ACPI_INTEGER Milliseconds). This simplifies all
13468related code considerably. This will require changes/updates to all OS
13469interface layers (OSLs.)
13470
13471Implemented a new external interface, AcpiInstallExceptionHandler, to
13472allow
13473a system exception handler to be installed. This handler is invoked upon
13474any
13475run-time exception that occurs during control method execution.
13476
13477Added support for the DSDT in AcpiTbFindTable. This allows the
13478DataTableRegion() operator to access the local copy of the DSDT.
13479
13480Code and Data Size: Current and previous core subsystem library sizes are
13481shown below. These are the code and data sizes for the acpica.lib
13482produced
13483by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13484any ACPI driver or OSPM code. The debug version of the code includes the
13485debug output trace mechanism and has a much larger code and data size.
13486Note
13487that these values will vary depending on the efficiency of the compiler
13488and
13489the compiler options used during generation.
13490
13491  Previous Release:
13492    Non-Debug Version:  77.8K Code,  11.4K Data,   89.2K Total
13493    Debug Version:     164.2K Code,  68.2K Data,  232.4K Total
13494  Current Release:
13495    Non-Debug Version:  77.9K Code,  11.4K Data,   89.3K Total
13496    Debug Version:     164.5K Code,  68.3K Data,  232.8K Total
13497
13498
134992) iASL Compiler/Disassembler:
13500
13501Fixed a problem with constant folding and the LNot operator. LNot was
13502returning 1 in the TRUE case, not Ones as per the ACPI specification.
13503This
13504could result in the generation of an incorrect folded/reduced constant.
13505
13506End-Of-File is now allowed within a "//"-style comment.  A parse error no
13507longer occurs if such a comment is at the very end of the input ASL
13508source
13509file.
13510
13511Implemented the "-r" option to override the Revision in the table header.
13512The initial use of this option will be to simplify the evaluation of the
13513AML
13514interpreter by allowing a single ASL source module to be compiled for
13515either
1351632-bit or 64-bit integers.
13517
13518
13519----------------------------------------
1352027 August 2004.  Summary of changes for version 20040827:
13521
135221) ACPI CA Core Subsystem:
13523
13524- Implemented support for implicit object conversion in the non-numeric
13525logical operators (LEqual, LGreater, LGreaterEqual, LLess, LLessEqual,
13526and
13527LNotEqual.)  Any combination of Integers/Strings/Buffers may now be used;
13528the second operand is implicitly converted on the fly to match the type
13529of
13530the first operand.  For example:
13531
13532    LEqual (Source1, Source2)
13533
13534Source1 and Source2 must each evaluate to an integer, a string, or a
13535buffer.
13536The data type of Source1 dictates the required type of Source2. Source2
13537is
13538implicitly converted if necessary to match the type of Source1.
13539
13540- Updated and corrected the behavior of the string conversion support.
13541The
13542rules concerning conversion of buffers to strings (according to the ACPI
13543specification) are as follows:
13544
13545ToDecimalString - explicit byte-wise conversion of buffer to string of
13546decimal values (0-255) separated by commas. ToHexString - explicit byte-
13547wise
13548conversion of buffer to string of hex values (0-FF) separated by commas.
13549ToString - explicit byte-wise conversion of buffer to string.  Byte-by-
13550byte
13551copy with no transform except NULL terminated. Any other implicit buffer-
13552to-
13553string conversion - byte-wise conversion of buffer to string of hex
13554values
13555(0-FF) separated by spaces.
13556
13557- Fixed typo in definition of AcpiGbl_EnableInterpreterSlack.
13558
13559- Fixed a problem in AcpiNsGetPathnameLength where the returned length
13560was
13561one byte too short in the case of a node in the root scope.  This could
13562cause a fault during debug output.
13563
13564- Code and Data Size: Current and previous core subsystem library sizes
13565are
13566shown below.  These are the code and data sizes for the acpica.lib
13567produced
13568by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13569any ACPI driver or OSPM code.  The debug version of the code includes the
13570debug output trace mechanism and has a much larger code and data size.
13571Note
13572that these values will vary depending on the efficiency of the compiler
13573and
13574the compiler options used during generation.
13575
13576  Previous Release:
13577    Non-Debug Version:  77.9K Code,  11.5K Data,   89.4K Total
13578    Debug Version:     164.1K Code,  68.3K Data,  232.4K Total
13579  Current Release:
13580    Non-Debug Version:  77.8K Code,  11.4K Data,   89.2K Total
13581    Debug Version:     164.2K Code,  68.2K Data,  232.4K Total
13582
13583
135842) iASL Compiler/Disassembler:
13585
13586- Fixed a Linux generation error.
13587
13588
13589----------------------------------------
1359016 August 2004.  Summary of changes for version 20040816:
13591
135921) ACPI CA Core Subsystem:
13593
13594Designed and implemented support within the AML interpreter for the so-
13595called "implicit return".  This support returns the result of the last
13596ASL
13597operation within a control method, in the absence of an explicit Return()
13598operator.  A few machines depend on this behavior, even though it is not
13599explicitly supported by the ASL language.  It is optional support that
13600can
13601be enabled at runtime via the AcpiGbl_EnableInterpreterSlack flag.
13602
13603Removed support for the PCI_Config address space from the internal low
13604level
13605hardware interfaces (AcpiHwLowLevelRead and AcpiHwLowLevelWrite).  This
13606support was not used internally, and would not work correctly anyway
13607because
13608the PCI bus number and segment number were not supported.  There are
13609separate interfaces for PCI configuration space access because of the
13610unique
13611interface.
13612
13613Code and Data Size: Current and previous core subsystem library sizes are
13614shown below.  These are the code and data sizes for the acpica.lib
13615produced
13616by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13617any ACPI driver or OSPM code.  The debug version of the code includes the
13618debug output trace mechanism and has a much larger code and data size.
13619Note
13620that these values will vary depending on the efficiency of the compiler
13621and
13622the compiler options used during generation.
13623
13624  Previous Release:
13625    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
13626    Debug Version:     164.1K Code,  68.2K Data,  232.3K Total
13627  Current Release:
13628    Non-Debug Version:  77.9K Code,  11.5K Data,   89.4K Total
13629    Debug Version:     164.1K Code,  68.3K Data,  232.4K Total
13630
13631
136322) iASL Compiler/Disassembler:
13633
13634Fixed a problem where constants in ASL expressions at the root level (not
13635within a control method) could be inadvertently truncated during code
13636generation.  This problem was introduced in the 20040715 release.
13637
13638
13639----------------------------------------
1364015 July 2004.  Summary of changes for version 20040715:
13641
136421) ACPI CA Core Subsystem:
13643
13644Restructured the internal HW GPE interfaces to pass/track the current
13645state
13646of interrupts (enabled/disabled) in order to avoid possible deadlock and
13647increase flexibility of the interfaces.
13648
13649Implemented a "lexicographical compare" for String and Buffer objects
13650within
13651the logical operators -- LGreater, LLess, LGreaterEqual, and LLessEqual -
13652-
13653as per further clarification to the ACPI specification.  Behavior is
13654similar
13655to C library "strcmp".
13656
13657Completed a major reduction in CPU stack use for the AcpiGetFirmwareTable
13658external function.  In the 32-bit non-debug case, the stack use has been
13659reduced from 168 bytes to 32 bytes.
13660
13661Deployed a new run-time configuration flag,
13662AcpiGbl_EnableInterpreterSlack,
13663whose purpose is to allow the AML interpreter to forgive certain bad AML
13664constructs.  Default setting is FALSE.
13665
13666Implemented the first use of AcpiGbl_EnableInterpreterSlack in the Field
13667IO
13668support code.  If enabled, it allows field access to go beyond the end of
13669a
13670region definition if the field is within the region length rounded up to
13671the
13672next access width boundary (a common coding error.)
13673
13674Renamed OSD_HANDLER to ACPI_OSD_HANDLER, and OSD_EXECUTION_CALLBACK to
13675ACPI_OSD_EXEC_CALLBACK for consistency with other ACPI symbols.  Also,
13676these
13677symbols are lowercase by the latest version of the AcpiSrc tool.
13678
13679The prototypes for the PCI interfaces in acpiosxf.h have been updated to
13680rename "Register" to simply "Reg" to prevent certain compilers from
13681complaining.
13682
13683Code and Data Size: Current and previous core subsystem library sizes are
13684shown below.  These are the code and data sizes for the acpica.lib
13685produced
13686by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13687any ACPI driver or OSPM code.  The debug version of the code includes the
13688debug output trace mechanism and has a much larger code and data size.
13689Note
13690that these values will vary depending on the efficiency of the compiler
13691and
13692the compiler options used during generation.
13693
13694  Previous Release:
13695    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
13696    Debug Version:     163.8K Code,  68.2K Data,  232.0K Total
13697  Current Release:
13698    Non-Debug Version:  78.0K Code,  11.5K Data,   89.5K Total
13699    Debug Version:     164.1K Code,  68.2K Data,  232.3K Total
13700
13701
137022) iASL Compiler/Disassembler:
13703
13704Implemented full support for Package objects within the Case() operator.
13705Note: The Break() operator is currently not supported within Case blocks
13706(TermLists) as there is some question about backward compatibility with
13707ACPI
137081.0 interpreters.
13709
13710
13711Fixed a problem where complex terms were not supported properly within
13712the
13713Switch() operator.
13714
13715Eliminated extraneous warning for compiler-emitted reserved names of the
13716form "_T_x".  (Used in Switch/Case operators.)
13717
13718Eliminated optimization messages for "_T_x" objects and small constants
13719within the DefinitionBlock operator.
13720
13721
13722----------------------------------------
1372315 June 2004.  Summary of changes for version 20040615:
13724
137251) ACPI CA Core Subsystem:
13726
13727Implemented support for Buffer and String objects (as per ACPI 2.0) for
13728the
13729following ASL operators:  LEqual, LGreater, LLess, LGreaterEqual, and
13730LLessEqual.
13731
13732All directory names in the entire source package are lower case, as they
13733were in earlier releases.
13734
13735Implemented "Disassemble" command in the AML debugger that will
13736disassemble
13737a single control method.
13738
13739Code and Data Size: Current and previous core subsystem library sizes are
13740shown below.  These are the code and data sizes for the acpica.lib
13741produced
13742by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13743any ACPI driver or OSPM code.  The debug version of the code includes the
13744debug output trace mechanism and has a much larger code and data size.
13745Note
13746that these values will vary depending on the efficiency of the compiler
13747and
13748the compiler options used during generation.
13749
13750  Previous Release:
13751    Non-Debug Version:  77.7K Code,  11.5K Data,   89.2K Total
13752    Debug Version:     163.3K Code,  67.2K Data,  230.5K Total
13753
13754  Current Release:
13755    Non-Debug Version:  77.8K Code,  11.5K Data,   89.3K Total
13756    Debug Version:     163.8K Code,  68.2K Data,  232.0K Total
13757
13758
137592) iASL Compiler/Disassembler:
13760
13761Implemented support for Buffer and String objects (as per ACPI 2.0) for
13762the
13763following ASL operators:  LEqual, LGreater, LLess, LGreaterEqual, and
13764LLessEqual.
13765
13766All directory names in the entire source package are lower case, as they
13767were in earlier releases.
13768
13769Fixed a fault when using the -g or -d<nofilename> options if the FADT was
13770not found.
13771
13772Fixed an issue with the Windows version of the compiler where later
13773versions
13774of Windows place the FADT in the registry under the name "FADT" and not
13775"FACP" as earlier versions did.  This applies when using the -g or -
13776d<nofilename> options.  The compiler now looks for both strings as
13777necessary.
13778
13779Fixed a problem with compiler namepath optimization where a namepath
13780within
13781the Scope() operator could not be optimized if the namepath was a subpath
13782of
13783the current scope path.
13784
13785----------------------------------------
1378627 May 2004.  Summary of changes for version 20040527:
13787
137881) ACPI CA Core Subsystem:
13789
13790Completed a new design and implementation for EBDA (Extended BIOS Data
13791Area)
13792support in the RSDP scan code.  The original code improperly scanned for
13793the
13794EBDA by simply scanning from memory location 0 to 0x400.  The correct
13795method
13796is to first obtain the EBDA pointer from within the BIOS data area, then
13797scan 1K of memory starting at the EBDA pointer.  There appear to be few
13798if
13799any machines that place the RSDP in the EBDA, however.
13800
13801Integrated a fix for a possible fault during evaluation of BufferField
13802arguments.  Obsolete code that was causing the problem was removed.
13803
13804Found and fixed a problem in the Field Support Code where data could be
13805corrupted on a bit field read that starts on an aligned boundary but does
13806not end on an aligned boundary.  Merged the read/write "datum length"
13807calculation code into a common procedure.
13808
13809Rolled in a couple of changes to the FreeBSD-specific header.
13810
13811
13812Code and Data Size: Current and previous core subsystem library sizes are
13813shown below.  These are the code and data sizes for the acpica.lib
13814produced
13815by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13816any ACPI driver or OSPM code.  The debug version of the code includes the
13817debug output trace mechanism and has a much larger code and data size.
13818Note
13819that these values will vary depending on the efficiency of the compiler
13820and
13821the compiler options used during generation.
13822
13823  Previous Release:
13824    Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
13825    Debug Version:     163.2K Code,  67.2K Data,  230.4K Total
13826  Current Release:
13827    Non-Debug Version:  77.7K Code,  11.5K Data,   89.2K Total
13828    Debug Version:     163.3K Code,  67.2K Data,  230.5K Total
13829
13830
138312) iASL Compiler/Disassembler:
13832
13833Fixed a generation warning produced by some overly-verbose compilers for
13834a
1383564-bit constant.
13836
13837----------------------------------------
1383814 May 2004.  Summary of changes for version 20040514:
13839
138401) ACPI CA Core Subsystem:
13841
13842Fixed a problem where hardware GPE enable bits sometimes not set properly
13843during and after GPE method execution.  Result of 04/27 changes.
13844
13845Removed extra "clear all GPEs" when sleeping/waking.
13846
13847Removed AcpiHwEnableGpe and AcpiHwDisableGpe, replaced by the single
13848AcpiHwWriteGpeEnableReg. Changed a couple of calls to the functions above
13849to
13850the new AcpiEv* calls as appropriate.
13851
13852ACPI_OS_NAME was removed from the OS-specific headers.  The default name
13853is
13854now "Microsoft Windows NT" for maximum compatibility.  However this can
13855be
13856changed by modifying the acconfig.h file.
13857
13858Allow a single invocation of AcpiInstallNotifyHandler for a handler that
13859traps both types of notifies (System, Device).  Use ACPI_ALL_NOTIFY flag.
13860
13861Run _INI methods on ThermalZone objects.  This is against the ACPI
13862specification, but there is apparently ASL code in the field that has
13863these
13864_INI methods, and apparently "other" AML interpreters execute them.
13865
13866Performed a full 16/32/64 bit lint that resulted in some small changes.
13867
13868Added a sleep simulation command to the AML debugger to test sleep code.
13869
13870Code and Data Size: Current and previous core subsystem library sizes are
13871shown below.  These are the code and data sizes for the acpica.lib
13872produced
13873by the Microsoft Visual C++ 6.0 compiler, and these values do not include
13874any ACPI driver or OSPM code.  The debug version of the code includes the
13875debug output trace mechanism and has a much larger code and data size.
13876Note
13877that these values will vary depending on the efficiency of the compiler
13878and
13879the compiler options used during generation.
13880
13881  Previous Release:
13882    Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
13883    Debug Version:     162.9K Code,  67.0K Data,  229.9K Total
13884  Current Release:
13885    Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
13886    Debug Version:     163.2K Code,  67.2K Data,  230.4K Total
13887
13888----------------------------------------
1388927 April 2004.  Summary of changes for version 20040427:
13890
138911) ACPI CA Core Subsystem:
13892
13893Completed a major overhaul of the GPE handling within ACPI CA.  There are
13894now three types of GPEs:  wake-only, runtime-only, and combination
13895wake/run.
13896The only GPEs allowed to be combination wake/run are for button-style
13897devices such as a control-method power button, control-method sleep
13898button,
13899or a notebook lid switch.  GPEs that have an _Lxx or _Exx method and are
13900not
13901referenced by any _PRW methods are marked for "runtime" and hardware
13902enabled.  Any GPE that is referenced by a _PRW method is marked for
13903"wake"
13904(and disabled at runtime).  However, at sleep time, only those GPEs that
13905have been specifically enabled for wake via the AcpiEnableGpe interface
13906will
13907actually be hardware enabled.
13908
13909A new external interface has been added, AcpiSetGpeType(), that is meant
13910to
13911be used by device drivers to force a GPE to a particular type.  It will
13912be
13913especially useful for the drivers for the button devices mentioned above.
13914
13915Completed restructuring of the ACPI CA initialization sequence so that
13916default operation region handlers are installed before GPEs are
13917initialized
13918and the _PRW methods are executed.  This will prevent errors when the
13919_PRW
13920methods attempt to access system memory or I/O space.
13921
13922GPE enable/disable no longer reads the GPE enable register.  We now keep
13923the
13924enable info for runtime and wake separate and in the GPE_EVENT_INFO.  We
13925thus no longer depend on the hardware to maintain these bits.
13926
13927Always clear the wake status and fixed/GPE status bits before sleep, even
13928for state S5.
13929
13930Improved the AML debugger output for displaying the GPE blocks and their
13931current status.
13932
13933Added new strings for the _OSI method, of the form "Windows 2001 SPx"
13934where
13935x = 0,1,2,3,4.
13936
13937Fixed a problem where the physical address was incorrectly calculated
13938when
13939the Load() operator was used to directly load from an Operation Region
13940(vs.
13941loading from a Field object.)  Also added check for minimum table length
13942for
13943this case.
13944
13945Fix for multiple mutex acquisition.  Restore original thread SyncLevel on
13946mutex release.
13947
13948Added ACPI_VALID_SXDS flag to the AcpiGetObjectInfo interface for
13949consistency with the other fields returned.
13950
13951Shrunk the ACPI_GPE_EVENT_INFO structure by 40%.  There is one such
13952structure for each GPE in the system, so the size of this structure is
13953important.
13954
13955CPU stack requirement reduction:  Cleaned up the method execution and
13956object
13957evaluation paths so that now a parameter structure is passed, instead of
13958copying the various method parameters over and over again.
13959
13960In evregion.c:  Correctly exit and reenter the interpreter region if and
13961only if dispatching an operation region request to a user-installed
13962handler.
13963Do not exit/reenter when dispatching to a default handler (e.g., default
13964system memory or I/O handlers)
13965
13966
13967Notes for updating drivers for the new GPE support.  The following
13968changes
13969must be made to ACPI-related device drivers that are attached to one or
13970more
13971GPEs: (This information will be added to the ACPI CA Programmer
13972Reference.)
13973
139741) AcpiInstallGpeHandler no longer automatically enables the GPE, you
13975must
13976explicitly call AcpiEnableGpe.
139772) There is a new interface called AcpiSetGpeType. This should be called
13978before enabling the GPE.  Also, this interface will automatically disable
13979the GPE if it is currently enabled.
139803) AcpiEnableGpe no longer supports a GPE type flag.
13981
13982Specific drivers that must be changed:
139831) EC driver:
13984    AcpiInstallGpeHandler (NULL, GpeNum, ACPI_GPE_EDGE_TRIGGERED,
13985AeGpeHandler, NULL);
13986    AcpiSetGpeType (NULL, GpeNum, ACPI_GPE_TYPE_RUNTIME);
13987    AcpiEnableGpe (NULL, GpeNum, ACPI_NOT_ISR);
13988
139892) Button Drivers (Power, Lid, Sleep):
13990Run _PRW method under parent device
13991If _PRW exists: /* This is a control-method button */
13992    Extract GPE number and possibly GpeDevice
13993    AcpiSetGpeType (GpeDevice, GpeNum, ACPI_GPE_TYPE_WAKE_RUN);
13994    AcpiEnableGpe (GpeDevice, GpeNum, ACPI_NOT_ISR);
13995
13996For all other devices that have _PRWs, we automatically set the GPE type
13997to
13998ACPI_GPE_TYPE_WAKE, but the GPE is NOT automatically (wake) enabled.
13999This
14000must be done on a selective basis, usually requiring some kind of user
14001app
14002to allow the user to pick the wake devices.
14003
14004
14005Code and Data Size: Current and previous core subsystem library sizes are
14006shown below.  These are the code and data sizes for the acpica.lib
14007produced
14008by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14009any ACPI driver or OSPM code.  The debug version of the code includes the
14010debug output trace mechanism and has a much larger code and data size.
14011Note
14012that these values will vary depending on the efficiency of the compiler
14013and
14014the compiler options used during generation.
14015
14016  Previous Release:
14017    Non-Debug Version:  77.0K Code,  11.4K Data,   88.4K Total
14018    Debug Version:     161.0K Code,  66.3K Data,  227.3K Total
14019  Current Release:
14020
14021    Non-Debug Version:  77.6K Code,  11.5K Data,   89.1K Total
14022    Debug Version:     162.9K Code,  67.0K Data,  229.9K Total
14023
14024
14025
14026----------------------------------------
1402702 April 2004.  Summary of changes for version 20040402:
14028
140291) ACPI CA Core Subsystem:
14030
14031Fixed an interpreter problem where an indirect store through an ArgX
14032parameter was incorrectly applying the "implicit conversion rules" during
14033the store.  From the ACPI specification: "If the target is a method local
14034or
14035argument (LocalX or ArgX), no conversion is performed and the result is
14036stored directly to the target".  The new behavior is to disable implicit
14037conversion during ALL stores to an ArgX.
14038
14039Changed the behavior of the _PRW method scan to ignore any and all errors
14040returned by a given _PRW.  This prevents the scan from aborting from the
14041failure of any single _PRW.
14042
14043Moved the runtime configuration parameters from the global init procedure
14044to
14045static variables in acglobal.h.  This will allow the host to override the
14046default values easily.
14047
14048Code and Data Size: Current and previous core subsystem library sizes are
14049shown below.  These are the code and data sizes for the acpica.lib
14050produced
14051by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14052any ACPI driver or OSPM code.  The debug version of the code includes the
14053debug output trace mechanism and has a much larger code and data size.
14054Note
14055that these values will vary depending on the efficiency of the compiler
14056and
14057the compiler options used during generation.
14058
14059  Previous Release:
14060    Non-Debug Version:  76.9K Code,  11.4K Data,   88.3K Total
14061    Debug Version:     160.8K Code,  66.1K Data,  226.9K Total
14062  Current Release:
14063    Non-Debug Version:  77.0K Code,  11.4K Data,   88.4K Total
14064    Debug Version:     161.0K Code,  66.3K Data,  227.3K Total
14065
14066
140672) iASL Compiler/Disassembler:
14068
14069iASL now fully disassembles SSDTs.  However, External() statements are
14070not
14071generated automatically for unresolved symbols at this time.  This is a
14072planned feature for future implementation.
14073
14074Fixed a scoping problem in the disassembler that occurs when the type of
14075the
14076target of a Scope() operator is overridden.  This problem caused an
14077incorrectly nested internal namespace to be constructed.
14078
14079Any warnings or errors that are emitted during disassembly are now
14080commented
14081out automatically so that the resulting file can be recompiled without
14082any
14083hand editing.
14084
14085----------------------------------------
1408626 March 2004.  Summary of changes for version 20040326:
14087
140881) ACPI CA Core Subsystem:
14089
14090Implemented support for "wake" GPEs via interaction between GPEs and the
14091_PRW methods.  Every GPE that is pointed to by one or more _PRWs is
14092identified as a WAKE GPE and by default will no longer be enabled at
14093runtime.  Previously, we were blindly enabling all GPEs with a
14094corresponding
14095_Lxx or _Exx method - but most of these turn out to be WAKE GPEs anyway.
14096We
14097believe this has been the cause of thousands of "spurious" GPEs on some
14098systems.
14099
14100This new GPE behavior is can be reverted to the original behavior (enable
14101ALL GPEs at runtime) via a runtime flag.
14102
14103Fixed a problem where aliased control methods could not access objects
14104properly.  The proper scope within the namespace was not initialized
14105(transferred to the target of the aliased method) before executing the
14106target method.
14107
14108Fixed a potential race condition on internal object deletion on the
14109return
14110object in AcpiEvaluateObject.
14111
14112Integrated a fix for resource descriptors where both _MEM and _MTP were
14113being extracted instead of just _MEM.  (i.e. bitmask was incorrectly too
14114wide, 0x0F instead of 0x03.)
14115
14116Added a special case for ACPI_ROOT_OBJECT in AcpiUtGetNodeName,
14117preventing
14118a
14119fault in some cases.
14120
14121Updated Notify() values for debug statements in evmisc.c
14122
14123Return proper status from AcpiUtMutexInitialize, not just simply AE_OK.
14124
14125Code and Data Size: Current and previous core subsystem library sizes are
14126shown below.  These are the code and data sizes for the acpica.lib
14127produced
14128by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14129any ACPI driver or OSPM code.  The debug version of the code includes the
14130debug output trace mechanism and has a much larger code and data size.
14131Note
14132that these values will vary depending on the efficiency of the compiler
14133and
14134the compiler options used during generation.
14135
14136  Previous Release:
14137
14138    Non-Debug Version:  76.5K Code,  11.3K Data,   87.8K Total
14139    Debug Version:     160.3K Code,  66.0K Data,  226.3K Total
14140  Current Release:
14141    Non-Debug Version:  76.9K Code,  11.4K Data,   88.3K Total
14142    Debug Version:     160.8K Code,  66.1K Data,  226.9K Total
14143
14144----------------------------------------
1414511 March 2004.  Summary of changes for version 20040311:
14146
141471) ACPI CA Core Subsystem:
14148
14149Fixed a problem where errors occurring during the parse phase of control
14150method execution did not abort cleanly.  For example, objects created and
14151installed in the namespace were not deleted.  This caused all subsequent
14152invocations of the method to return the AE_ALREADY_EXISTS exception.
14153
14154Implemented a mechanism to force a control method to "Serialized"
14155execution
14156if the method attempts to create namespace objects. (The root of the
14157AE_ALREADY_EXISTS problem.)
14158
14159Implemented support for the predefined _OSI "internal" control method.
14160Initial supported strings are "Linux", "Windows 2000", "Windows 2001",
14161and
14162"Windows 2001.1", and can be easily upgraded for new strings as
14163necessary.
14164This feature will allow "other" operating systems to execute the fully
14165tested, "Windows" code path through the ASL code
14166
14167Global Lock Support:  Now allows multiple acquires and releases with any
14168internal thread.  Removed concept of "owning thread" for this special
14169mutex.
14170
14171Fixed two functions that were inappropriately declaring large objects on
14172the
14173CPU stack:  PsParseLoop, NsEvaluateRelative.  Reduces the stack usage
14174during
14175method execution considerably.
14176
14177Fixed a problem in the ACPI 2.0 FACS descriptor (actbl2.h) where the
14178S4Bios_f field was incorrectly defined as UINT32 instead of UINT32_BIT.
14179
14180Fixed a problem where AcpiEvGpeDetect would fault if there were no GPEs
14181defined on the machine.
14182
14183Implemented two runtime options:  One to force all control method
14184execution
14185to "Serialized" to mimic Windows behavior, another to disable _OSI
14186support
14187if it causes problems on a given machine.
14188
14189Code and Data Size: Current and previous core subsystem library sizes are
14190shown below.  These are the code and data sizes for the acpica.lib
14191produced
14192by the Microsoft Visual C++ 6.0 compiler, and these values do not include
14193any ACPI driver or OSPM code.  The debug version of the code includes the
14194debug output trace mechanism and has a much larger code and data size.
14195Note
14196that these values will vary depending on the efficiency of the compiler
14197and
14198the compiler options used during generation.
14199
14200  Previous Release:
14201    Non-Debug Version:  74.8K Code,  10.1K Data,   84.9K Total
14202    Debug Version:     158.7K Code,  65.1K Data,  223.8K Total
14203  Current Release:
14204    Non-Debug Version:  76.5K Code,  11.3K Data,   87.8K Total
14205    Debug Version:     160.3K Code,  66.0K Data,  226.3K Total
14206
142072) iASL Compiler/Disassembler:
14208
14209Fixed an array size problem for FreeBSD that would cause the compiler to
14210fault.
14211
14212----------------------------------------
1421320 February 2004.  Summary of changes for version 20040220:
14214
14215
142161) ACPI CA Core Subsystem:
14217
14218Implemented execution of _SxD methods for Device objects in the
14219GetObjectInfo interface.
14220
14221Fixed calls to _SST method to pass the correct arguments.
14222
14223Added a call to _SST on wake to restore to "working" state.
14224
14225Check for End-Of-Buffer failure case in the WalkResources interface.
14226
14227Integrated fix for 64-bit alignment issue in acglobal.h by moving two
14228structures to the beginning of the file.
14229
14230After wake, clear GPE status register(s) before enabling GPEs.
14231
14232After wake, clear/enable power button.  (Perhaps we should clear/enable
14233all
14234fixed events upon wake.)
14235
14236Fixed a couple of possible memory leaks in the Namespace manager.
14237
14238Integrated latest acnetbsd.h file.
14239
14240----------------------------------------
1424111 February 2004.  Summary of changes for version 20040211:
14242
14243
142441) ACPI CA Core Subsystem:
14245
14246Completed investigation and implementation of the call-by-reference
14247mechanism for control method arguments.
14248
14249Fixed a problem where a store of an object into an indexed package could
14250fail if the store occurs within a different method than the method that
14251created the package.
14252
14253Fixed a problem where the ToDecimal operator could return incorrect
14254results.
14255
14256Fixed a problem where the CopyObject operator could fail on some of the
14257more
14258obscure objects (e.g., Reference objects.)
14259
14260Improved the output of the Debug object to display buffer, package, and
14261index objects.
14262
14263Fixed a problem where constructs of the form "RefOf (ArgX)" did not
14264return
14265the expected result.
14266
14267Added permanent ACPI_REPORT_ERROR macros for all instances of the
14268ACPI_AML_INTERNAL exception.
14269
14270Integrated latest version of acfreebsd.h
14271
14272----------------------------------------
1427316 January 2004.  Summary of changes for version 20040116:
14274
14275The purpose of this release is primarily to update the copyright years in
14276each module, thus causing a huge number of diffs.  There are a few small
14277functional changes, however.
14278
142791) ACPI CA Core Subsystem:
14280
14281Improved error messages when there is a problem finding one or more of
14282the
14283required base ACPI tables
14284
14285Reintroduced the definition of APIC_HEADER in actbl.h
14286
14287Changed definition of MADT_ADDRESS_OVERRIDE to 64 bits (actbl.h)
14288
14289Removed extraneous reference to NewObj in dsmthdat.c
14290
142912) iASL compiler
14292
14293Fixed a problem introduced in December that disabled the correct
14294disassembly
14295of Resource Templates
14296
14297
14298----------------------------------------
1429903 December 2003.  Summary of changes for version 20031203:
14300
143011) ACPI CA Core Subsystem:
14302
14303Changed the initialization of Operation Regions during subsystem
14304init to perform two entire walks of the ACPI namespace; The first
14305to initialize the regions themselves, the second to execute the
14306_REG methods.  This fixed some interdependencies across _REG
14307methods found on some machines.
14308
14309Fixed a problem where a Store(Local0, Local1) could simply update
14310the object reference count, and not create a new copy of the
14311object if the Local1 is uninitialized.
14312
14313Implemented support for the _SST reserved method during sleep
14314transitions.
14315
14316Implemented support to clear the SLP_TYP and SLP_EN bits when
14317waking up, this is apparently required by some machines.
14318
14319When sleeping, clear the wake status only if SleepState is not S5.
14320
14321Fixed a problem in AcpiRsExtendedIrqResource() where an incorrect
14322pointer arithmetic advanced a string pointer too far.
14323
14324Fixed a problem in AcpiTbGetTablePtr() where a garbage pointer
14325could be returned if the requested table has not been loaded.
14326
14327Within the support for IRQ resources, restructured the handling of
14328the active and edge/level bits.
14329
14330Fixed a few problems in AcpiPsxExecute() where memory could be
14331leaked under certain error conditions.
14332
14333Improved error messages for the cases where the ACPI mode could
14334not be entered.
14335
14336Code and Data Size: Current and previous core subsystem library
14337sizes are shown below.  These are the code and data sizes for the
14338acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14339these values do not include any ACPI driver or OSPM code.  The
14340debug version of the code includes the debug output trace
14341mechanism and has a much larger code and data size.  Note that
14342these values will vary depending on the efficiency of the compiler
14343and the compiler options used during generation.
14344
14345  Previous Release (20031029):
14346    Non-Debug Version:  74.4K Code,  10.1K Data,   84.5K Total
14347    Debug Version:     158.3K Code,  65.0K Data,  223.3K Total
14348  Current Release:
14349    Non-Debug Version:  74.8K Code,  10.1K Data,   84.9K Total
14350    Debug Version:     158.7K Code,  65.1K Data,  223.8K Total
14351
143522) iASL Compiler/Disassembler:
14353
14354Implemented a fix for the iASL disassembler where a bad index was
14355generated.  This was most noticeable on 64-bit platforms
14356
14357
14358----------------------------------------
1435929 October 2003.  Summary of changes for version 20031029:
14360
143611) ACPI CA Core Subsystem:
14362
14363
14364Fixed a problem where a level-triggered GPE with an associated
14365_Lxx control method was incorrectly cleared twice.
14366
14367Fixed a problem with the Field support code where an access can
14368occur beyond the end-of-region if the field is non-aligned but
14369extends to the very end of the parent region (resulted in an
14370AE_AML_REGION_LIMIT exception.)
14371
14372Fixed a problem with ACPI Fixed Events where an RT Clock handler
14373would not get invoked on an RTC event.  The RTC event bitmasks for
14374the PM1 registers were not being initialized properly.
14375
14376Implemented support for executing _STA and _INI methods for
14377Processor objects.  Although this is currently not part of the
14378ACPI specification, there is existing ASL code that depends on the
14379init-time execution of these methods.
14380
14381Implemented and deployed a GetDescriptorName function to decode
14382the various types of internal descriptors.  Guards against null
14383descriptors during debug output also.
14384
14385Implemented and deployed a GetNodeName function to extract the 4-
14386character namespace node name.  This function simplifies the debug
14387and error output, as well as guarding against null pointers during
14388output.
14389
14390Implemented and deployed the ACPI_FORMAT_UINT64 helper macro to
14391simplify the debug and error output of 64-bit integers.  This
14392macro replaces the HIDWORD and LODWORD macros for dumping these
14393integers.
14394
14395Updated the implementation of the Stall() operator to only call
14396AcpiOsStall(), and also return an error if the operand is larger
14397than 255.  This preserves the required behavior of not
14398relinquishing the processor, as would happen if AcpiOsSleep() was
14399called for "long stalls".
14400
14401Constructs of the form "Store(LocalX,LocalX)" where LocalX is not
14402initialized are now treated as NOOPs.
14403
14404Cleaned up a handful of warnings during 64-bit generation.
14405
14406Fixed a reported error where and incorrect GPE number was passed
14407to the GPE dispatch handler.  This value is only used for error
14408output, however.  Used this opportunity to clean up and streamline
14409the GPE dispatch code.
14410
14411Code and Data Size: Current and previous core subsystem library
14412sizes are shown below.  These are the code and data sizes for the
14413acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14414these values do not include any ACPI driver or OSPM code.  The
14415
14416debug version of the code includes the debug output trace
14417mechanism and has a much larger code and data size.  Note that
14418these values will vary depending on the efficiency of the compiler
14419and the compiler options used during generation.
14420
14421  Previous Release (20031002):
14422    Non-Debug Version:  74.1K Code,   9.7K Data,   83.8K Total
14423    Debug Version:     157.9K Code,  64.8K Data,  222.7K Total
14424  Current Release:
14425    Non-Debug Version:  74.4K Code,  10.1K Data,   84.5K Total
14426    Debug Version:     158.3K Code,  65.0K Data,  223.3K Total
14427
14428
144292) iASL Compiler/Disassembler:
14430
14431Updated the iASL compiler to return an error if the operand to the
14432Stall() operator is larger than 255.
14433
14434
14435----------------------------------------
1443602 October 2003.  Summary of changes for version 20031002:
14437
14438
144391) ACPI CA Core Subsystem:
14440
14441Fixed a problem with Index Fields where the index was not
14442incremented for fields that require multiple writes to the
14443index/data registers (Fields that are wider than the data
14444register.)
14445
14446Fixed a problem with all Field objects where a write could go
14447beyond the end-of-field if the field was larger than the access
14448granularity and therefore required multiple writes to complete the
14449request.  An extra write beyond the end of the field could happen
14450inadvertently.
14451
14452Fixed a problem with Index Fields where a BUFFER_OVERFLOW error
14453would incorrectly be returned if the width of the Data Register
14454was larger than the specified field access width.
14455
14456Completed fixes for LoadTable() and Unload() and verified their
14457operation.  Implemented full support for the "DdbHandle" object
14458throughout the ACPI CA subsystem.
14459
14460Implemented full support for the MADT and ECDT tables in the ACPI
14461CA header files.  Even though these tables are not directly
14462consumed by ACPI CA, the header definitions are useful for ACPI
14463device drivers.
14464
14465Integrated resource descriptor fixes posted to the Linux ACPI
14466list.  This included checks for minimum descriptor length, and
14467support for trailing NULL strings within descriptors that have
14468optional string elements.
14469
14470Code and Data Size: Current and previous core subsystem library
14471sizes are shown below.  These are the code and data sizes for the
14472acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14473these values do not include any ACPI driver or OSPM code.  The
14474debug version of the code includes the debug output trace
14475mechanism and has a much larger code and data size.  Note that
14476these values will vary depending on the efficiency of the compiler
14477and the compiler options used during generation.
14478
14479  Previous Release (20030918):
14480    Non-Debug Version:  73.9K Code,   9.7K Data,   83.6K Total
14481    Debug Version:     157.3K Code,  64.5K Data,  221.8K Total
14482  Current Release:
14483    Non-Debug Version:  74.1K Code,   9.7K Data,   83.8K Total
14484    Debug Version:     157.9K Code,  64.8K Data,  222.7K Total
14485
14486
144872) iASL Compiler:
14488
14489Implemented detection of non-ASCII characters within the input
14490source ASL file.  This catches attempts to compile binary (AML)
14491files early in the compile, with an informative error message.
14492
14493Fixed a problem where the disassembler would fault if the output
14494filename could not be generated or if the output file could not be
14495opened.
14496
14497----------------------------------------
1449818 September 2003.  Summary of changes for version 20030918:
14499
14500
145011) ACPI CA Core Subsystem:
14502
14503Found and fixed a longstanding problem with the late execution of
14504the various deferred AML opcodes (such as Operation Regions,
14505Buffer Fields, Buffers, and Packages).  If the name string
14506specified for the name of the new object placed the object in a
14507scope other than the current scope, the initialization/execution
14508of the opcode failed.  The solution to this problem was to
14509implement a mechanism where the late execution of such opcodes
14510does not attempt to lookup/create the name a second time in an
14511incorrect scope.  This fixes the "region size computed
14512incorrectly" problem.
14513
14514Fixed a call to AcpiHwRegisterWrite in hwregs.c that was causing a
14515Global Lock AE_BAD_PARAMETER error.
14516
14517Fixed several 64-bit issues with prototypes, casting and data
14518types.
14519
14520Removed duplicate prototype from acdisasm.h
14521
14522Fixed an issue involving EC Operation Region Detach (Shaohua Li)
14523
14524Code and Data Size: Current and previous core subsystem library
14525sizes are shown below.  These are the code and data sizes for the
14526acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14527these values do not include any ACPI driver or OSPM code.  The
14528debug version of the code includes the debug output trace
14529mechanism and has a much larger code and data size.  Note that
14530these values will vary depending on the efficiency of the compiler
14531and the compiler options used during generation.
14532
14533  Previous Release:
14534
14535    Non-Debug Version:  73.7K Code,   9.7K Data,   83.4K Total
14536    Debug Version:     156.9K Code,  64.2K Data,  221.1K Total
14537  Current Release:
14538    Non-Debug Version:  73.9K Code,   9.7K Data,   83.6K Total
14539    Debug Version:     157.3K Code,  64.5K Data,  221.8K Total
14540
14541
145422) Linux:
14543
14544Fixed the AcpiOsSleep implementation in osunixxf.c to pass the
14545correct sleep time in seconds.
14546
14547----------------------------------------
1454814 July 2003.  Summary of changes for version 20030619:
14549
145501) ACPI CA Core Subsystem:
14551
14552Parse SSDTs in order discovered, as opposed to reverse order
14553(Hrvoje Habjanic)
14554
14555Fixes from FreeBSD and NetBSD. (Frank van der Linden, Thomas
14556Klausner,
14557   Nate Lawson)
14558
14559
145602) Linux:
14561
14562Dynamically allocate SDT list (suggested by Andi Kleen)
14563
14564proc function return value cleanups (Andi Kleen)
14565
14566Correctly handle NMI watchdog during long stalls (Andrew Morton)
14567
14568Make it so acpismp=force works (reported by Andrew Morton)
14569
14570
14571----------------------------------------
1457219 June 2003.  Summary of changes for version 20030619:
14573
145741) ACPI CA Core Subsystem:
14575
14576Fix To/FromBCD, eliminating the need for an arch-specific #define.
14577
14578Do not acquire a semaphore in the S5 shutdown path.
14579
14580Fix ex_digits_needed for 0. (Takayoshi Kochi)
14581
14582Fix sleep/stall code reversal. (Andi Kleen)
14583
14584Revert a change having to do with control method calling
14585semantics.
14586
145872) Linux:
14588
14589acpiphp update (Takayoshi Kochi)
14590
14591Export acpi_disabled for sonypi (Stelian Pop)
14592
14593Mention acpismp=force in config help
14594
14595Re-add acpitable.c and acpismp=force. This improves backwards
14596
14597compatibility and also cleans up the code to a significant degree.
14598
14599Add ASUS Value-add driver (Karol Kozimor and Julien Lerouge)
14600
14601----------------------------------------
1460222 May 2003.  Summary of changes for version 20030522:
14603
146041) ACPI CA Core Subsystem:
14605
14606Found and fixed a reported problem where an AE_NOT_FOUND error
14607occurred occasionally during _BST evaluation.  This turned out to
14608be an Owner ID allocation issue where a called method did not get
14609a new ID assigned to it.  Eventually, (after 64k calls), the Owner
14610ID UINT16 would wraparound so that the ID would be the same as the
14611caller's and the called method would delete the caller's
14612namespace.
14613
14614Implemented extended error reporting for control methods that are
14615aborted due to a run-time exception.  Output includes the exact
14616AML instruction that caused the method abort, a dump of the method
14617locals and arguments at the time of the abort, and a trace of all
14618nested control method calls.
14619
14620Modified the interpreter to allow the creation of buffers of zero
14621length from the AML code. Implemented new code to ensure that no
14622attempt is made to actually allocate a memory buffer (of length
14623zero) - instead, a simple buffer object with a NULL buffer pointer
14624and length zero is created.  A warning is no longer issued when
14625the AML attempts to create a zero-length buffer.
14626
14627Implemented a workaround for the "leading asterisk issue" in
14628_HIDs, _UIDs, and _CIDs in the AML interpreter.  One leading
14629asterisk is automatically removed if present in any HID, UID, or
14630CID strings.  The iASL compiler will still flag this asterisk as
14631an error, however.
14632
14633Implemented full support for _CID methods that return a package of
14634multiple CIDs (Compatible IDs).  The AcpiGetObjectInfo() interface
14635now additionally returns a device _CID list if present.  This
14636required a change to the external interface in order to pass an
14637ACPI_BUFFER object as a parameter since the _CID list is of
14638variable length.
14639
14640Fixed a problem with the new AE_SAME_HANDLER exception where
14641handler initialization code did not know about this exception.
14642
14643Code and Data Size: Current and previous core subsystem library
14644sizes are shown below.  These are the code and data sizes for the
14645acpica.lib produced by the Microsoft Visual C++ 6.0 compiler, and
14646these values do not include any ACPI driver or OSPM code.  The
14647debug version of the code includes the debug output trace
14648mechanism and has a much larger code and data size.  Note that
14649these values will vary depending on the efficiency of the compiler
14650and the compiler options used during generation.
14651
14652  Previous Release (20030509):
14653    Non-Debug Version:  73.4K Code,   9.7K Data,   83.1K Total
14654    Debug Version:     156.1K Code,  63.9K Data,  220.0K Total
14655  Current Release:
14656    Non-Debug Version:  73.7K Code,   9.7K Data,   83.4K Total
14657    Debug Version:     156.9K Code,  64.2K Data,  221.1K Total
14658
14659
146602) Linux:
14661
14662Fixed a bug in which we would reinitialize the ACPI interrupt
14663after it was already working, thus disabling all ACPI and the IRQs
14664for any other device sharing the interrupt. (Thanks to Stian
14665Jordet)
14666
14667Toshiba driver update (John Belmonte)
14668
14669Return only 0 or 1 for our interrupt handler status (Andrew
14670Morton)
14671
14672
146733) iASL Compiler:
14674
14675Fixed a reported problem where multiple (nested) ElseIf()
14676statements were not handled correctly by the compiler, resulting
14677in incorrect warnings and incorrect AML code.  This was a problem
14678in both the ASL parser and the code generator.
14679
14680
146814) Documentation:
14682
14683Added changes to existing interfaces, new exception codes, and new
14684text concerning reference count object management versus garbage
14685collection.
14686
14687----------------------------------------
1468809 May 2003.  Summary of changes for version 20030509.
14689
14690
146911) ACPI CA Core Subsystem:
14692
14693Changed the subsystem initialization sequence to hold off
14694installation of address space handlers until the hardware has been
14695initialized and the system has entered ACPI mode.  This is because
14696the installation of space handlers can cause _REG methods to be
14697run.  Previously, the _REG methods could potentially be run before
14698ACPI mode was enabled.
14699
14700Fixed some memory leak issues related to address space handler and
14701notify handler installation.  There were some problems with the
14702reference count mechanism caused by the fact that the handler
14703objects are shared across several namespace objects.
14704
14705Fixed a reported problem where reference counts within the
14706namespace were not properly updated when named objects created by
14707method execution were deleted.
14708
14709Fixed a reported problem where multiple SSDTs caused a deletion
14710issue during subsystem termination.  Restructured the table data
14711structures to simplify the linked lists and the related code.
14712
14713Fixed a problem where the table ID associated with secondary
14714tables (SSDTs) was not being propagated into the namespace objects
14715created by those tables.  This would only present a problem for
14716tables that are unloaded at run-time, however.
14717
14718Updated AcpiOsReadable and AcpiOsWritable to use the ACPI_SIZE
14719type as the length parameter (instead of UINT32).
14720
14721Solved a long-standing problem where an ALREADY_EXISTS error
14722appears on various systems.  This problem could happen when there
14723are multiple PCI_Config operation regions under a single PCI root
14724bus.  This doesn't happen very frequently, but there are some
14725systems that do this in the ASL.
14726
14727Fixed a reported problem where the internal DeleteNode function
14728was incorrectly handling the case where a namespace node was the
14729first in the parent's child list, and had additional peers (not
14730the only child, but first in the list of children.)
14731
14732Code and Data Size: Current core subsystem library sizes are shown
14733below.  These are the code and data sizes for the acpica.lib
14734produced by the Microsoft Visual C++ 6.0 compiler, and these
14735values do not include any ACPI driver or OSPM code.  The debug
14736version of the code includes the debug output trace mechanism and
14737has a much larger code and data size.  Note that these values will
14738vary depending on the efficiency of the compiler and the compiler
14739options used during generation.
14740
14741  Previous Release
14742    Non-Debug Version:  73.7K Code,   9.5K Data,   83.2K Total
14743    Debug Version:     156.1K Code,  63.6K Data,  219.7K Total
14744  Current Release:
14745    Non-Debug Version:  73.4K Code,   9.7K Data,   83.1K Total
14746    Debug Version:     156.1K Code,  63.9K Data,  220.0K Total
14747
14748
147492) Linux:
14750
14751Allow ":" in OS override string (Ducrot Bruno)
14752
14753Kobject fix (Greg KH)
14754
14755
147563 iASL Compiler/Disassembler:
14757
14758Fixed a problem in the generation of the C source code files (AML
14759is emitted in C source statements for BIOS inclusion) where the
14760Ascii dump that appears within a C comment at the end of each line
14761could cause a compile time error if the AML sequence happens to
14762have an open comment or close comment sequence embedded.
14763
14764
14765----------------------------------------
1476624 April 2003.  Summary of changes for version 20030424.
14767
14768
147691) ACPI CA Core Subsystem:
14770
14771Support for big-endian systems has been implemented.  Most of the
14772support has been invisibly added behind big-endian versions of the
14773ACPI_MOVE_* macros.
14774
14775Fixed a problem in AcpiHwDisableGpeBlock() and
14776AcpiHwClearGpeBlock() where an incorrect offset was passed to the
14777low level hardware write routine.  The offset parameter was
14778actually eliminated from the low level read/write routines because
14779they had become obsolete.
14780
14781Fixed a problem where a handler object was deleted twice during
14782the removal of a fixed event handler.
14783
14784
147852) Linux:
14786
14787A fix for SMP systems with link devices was contributed by
14788
14789Compaq's Dan Zink.
14790
14791(2.5) Return whether we handled the interrupt in our IRQ handler.
14792(Linux ISRs no longer return void, so we can propagate the handler
14793return value from the ACPI CA core back to the OS.)
14794
14795
14796
147973) Documentation:
14798
14799The ACPI CA Programmer Reference has been updated to reflect new
14800interfaces and changes to existing interfaces.
14801
14802----------------------------------------
1480328 March 2003.  Summary of changes for version 20030328.
14804
148051) ACPI CA Core Subsystem:
14806
14807The GPE Block Device support has been completed.  New interfaces
14808are AcpiInstallGpeBlock and AcpiRemoveGpeBlock.  The Event
14809interfaces (enable, disable, clear, getstatus) have been split
14810into separate interfaces for Fixed Events and General Purpose
14811Events (GPEs) in order to support GPE Block Devices properly.
14812
14813Fixed a problem where the error message "Failed to acquire
14814semaphore" would appear during operations on the embedded
14815controller (EC).
14816
14817Code and Data Size: Current core subsystem library sizes are shown
14818below.  These are the code and data sizes for the acpica.lib
14819produced by the Microsoft Visual C++ 6.0 compiler, and these
14820values do not include any ACPI driver or OSPM code.  The debug
14821version of the code includes the debug output trace mechanism and
14822has a much larger code and data size.  Note that these values will
14823vary depending on the efficiency of the compiler and the compiler
14824options used during generation.
14825
14826  Previous Release
14827    Non-Debug Version:  72.3K Code,   9.5K Data,   81.8K Total
14828    Debug Version:     154.0K Code,  63.4K Data,  217.4K Total
14829  Current Release:
14830    Non-Debug Version:  73.7K Code,   9.5K Data,   83.2K Total
14831    Debug Version:     156.1K Code,  63.6K Data,  219.7K Total
14832
14833
14834----------------------------------------
1483528 February 2003.  Summary of changes for version 20030228.
14836
14837
148381) ACPI CA Core Subsystem:
14839
14840The GPE handling and dispatch code has been completely overhauled
14841in preparation for support of GPE Block Devices (ID ACPI0006).
14842This affects internal data structures and code only; there should
14843be no differences visible externally.  One new file has been
14844added, evgpeblk.c
14845
14846The FADT fields GPE0_BLK_LEN and GPE1_BLK_LEN are now the only
14847fields that are used to determine the GPE block lengths.  The
14848REGISTER_BIT_WIDTH field of the X_GPEx_BLK extended address
14849structures are ignored.  This is per the ACPI specification but it
14850isn't very clear.  The full 256 Block 0/1 GPEs are now supported
14851(the use of REGISTER_BIT_WIDTH limited the number of GPEs to 128).
14852
14853In the SCI interrupt handler, removed the read of the PM1_CONTROL
14854register to look at the SCI_EN bit.  On some machines, this read
14855causes an SMI event and greatly slows down SCI events.  (This may
14856in fact be the cause of slow battery status response on some
14857systems.)
14858
14859Fixed a problem where a store of a NULL string to a package object
14860could cause the premature deletion of the object.  This was seen
14861during execution of the battery _BIF method on some systems,
14862resulting in no battery data being returned.
14863
14864Added AcpiWalkResources interface to simplify parsing of resource
14865lists.
14866
14867Code and Data Size: Current core subsystem library sizes are shown
14868below.  These are the code and data sizes for the acpica.lib
14869produced by the Microsoft Visual C++ 6.0 compiler, and these
14870values do not include any ACPI driver or OSPM code.  The debug
14871version of the code includes the debug output trace mechanism and
14872has a much larger code and data size.  Note that these values will
14873vary depending on the efficiency of the compiler and the compiler
14874options used during generation.
14875
14876  Previous Release
14877    Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
14878    Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
14879  Current Release:
14880    Non-Debug Version:  72.3K Code,   9.5K Data,   81.8K Total
14881    Debug Version:     154.0K Code,  63.4K Data,  217.4K Total
14882
14883
148842) Linux
14885
14886S3 fixes (Ole Rohne)
14887
14888Update ACPI PHP driver with to use new acpi_walk_resource API
14889(Bjorn Helgaas)
14890
14891Add S4BIOS support (Pavel Machek)
14892
14893Map in entire table before performing checksum (John Stultz)
14894
14895Expand the mem= cmdline to allow the specification of reserved and
14896ACPI DATA blocks (Pavel Machek)
14897
14898Never use ACPI on VISWS
14899
14900Fix derive_pci_id (Ducrot Bruno, Alvaro Lopez)
14901
14902Revert a change that allowed P_BLK lengths to be 4 or 5. This is
14903causing us to think that some systems support C2 when they really
14904don't.
14905
14906Do not count processor objects for non-present CPUs (Thanks to
14907Dominik Brodowski)
14908
14909
149103) iASL Compiler:
14911
14912Fixed a problem where ASL include files could not be found and
14913opened.
14914
14915Added support for the _PDC reserved name.
14916
14917
14918----------------------------------------
1491922 January 2003.  Summary of changes for version 20030122.
14920
14921
149221) ACPI CA Core Subsystem:
14923
14924Added a check for constructs of the form:  Store (Local0, Local0)
14925where Local0 is not initialized.  Apparently, some BIOS
14926programmers believe that this is a NOOP.  Since this store doesn't
14927do anything anyway, the new prototype behavior will ignore this
14928error.  This is a case where we can relax the strict checking in
14929the interpreter in the name of compatibility.
14930
14931
149322) Linux
14933
14934The AcpiSrc Source Conversion Utility has been released with the
14935Linux package for the first time.  This is the utility that is
14936used to convert the ACPI CA base source code to the Linux version.
14937
14938(Both) Handle P_BLK lengths shorter than 6 more gracefully
14939
14940(Both) Move more headers to include/acpi, and delete an unused
14941header.
14942
14943(Both) Move drivers/acpi/include directory to include/acpi
14944
14945(Both) Boot functions don't use cmdline, so don't pass it around
14946
14947(Both) Remove include of unused header (Adrian Bunk)
14948
14949(Both) acpiphp.h includes both linux/acpi.h and acpi_bus.h. Since
14950the
14951former now also includes the latter, acpiphp.h only needs the one,
14952now.
14953
14954(2.5) Make it possible to select method of bios restoring after S3
14955resume. [=> no more ugly ifdefs] (Pavel Machek)
14956
14957(2.5) Make proc write interfaces work (Pavel Machek)
14958
14959(2.5) Properly init/clean up in cpufreq/acpi (Dominik Brodowski)
14960
14961(2.5) Break out ACPI Perf code into its own module, under cpufreq
14962(Dominik Brodowski)
14963
14964(2.4) S4BIOS support (Ducrot Bruno)
14965
14966(2.4) Fix acpiphp_glue.c for latest ACPI struct changes (Sergio
14967Visinoni)
14968
14969
149703) iASL Compiler:
14971
14972Added support to disassemble SSDT and PSDTs.
14973
14974Implemented support to obtain SSDTs from the Windows registry if
14975available.
14976
14977
14978----------------------------------------
1497909 January 2003.  Summary of changes for version 20030109.
14980
149811) ACPI CA Core Subsystem:
14982
14983Changed the behavior of the internal Buffer-to-String conversion
14984function.  The current ACPI specification states that the contents
14985of the buffer are "converted to a string of two-character
14986hexadecimal numbers, each separated by a space".  Unfortunately,
14987this definition is not backwards compatible with existing ACPI 1.0
14988implementations (although the behavior was not defined in the ACPI
149891.0 specification).  The new behavior simply copies data from the
14990buffer to the string until a null character is found or the end of
14991the buffer is reached.  The new String object is always null
14992terminated.  This problem was seen during the generation of _BIF
14993battery data where incorrect strings were returned for battery
14994type, etc.  This will also require an errata to the ACPI
14995specification.
14996
14997Renamed all instances of NATIVE_UINT and NATIVE_INT to
14998ACPI_NATIVE_UINT and ACPI_NATIVE_INT, respectively.
14999
15000Copyright in all module headers (both Linux and non-Linux) has be
15001updated to 2003.
15002
15003Code and Data Size: Current core subsystem library sizes are shown
15004below.  These are the code and data sizes for the acpica.lib
15005produced by the Microsoft Visual C++ 6.0 compiler, and these
15006values do not include any ACPI driver or OSPM code.  The debug
15007version of the code includes the debug output trace mechanism and
15008has a much larger code and data size.  Note that these values will
15009vary depending on the efficiency of the compiler and the compiler
15010options used during generation.
15011
15012  Previous Release
15013    Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
15014    Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
15015  Current Release:
15016    Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
15017    Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
15018
15019
150202) Linux
15021
15022Fixed an oops on module insertion/removal (Matthew Tippett)
15023
15024(2.4) Fix to handle dynamic size of mp_irqs (Joerg Prante)
15025
15026(2.5) Replace pr_debug (Randy Dunlap)
15027
15028(2.5) Remove usage of CPUFREQ_ALL_CPUS (Dominik Brodowski)
15029
15030(Both) Eliminate spawning of thread from timer callback, in favor
15031of schedule_work()
15032
15033(Both) Show Lid status in /proc (Zdenek OGAR Skalak)
15034
15035(Both) Added define for Fixed Function HW region (Matthew Wilcox)
15036
15037(Both) Add missing statics to button.c (Pavel Machek)
15038
15039Several changes have been made to the source code translation
15040utility that generates the Linux Code in order to make the code
15041more "Linux-like":
15042
15043All typedefs on structs and unions have been removed in keeping
15044with the Linux coding style.
15045
15046Removed the non-Linux SourceSafe module revision number from each
15047module header.
15048
15049Completed major overhaul of symbols to be lowercase for linux.
15050Doubled the number of symbols that are lowercase.
15051
15052Fixed a problem where identifiers within procedure headers and
15053within quotes were not fully lower cased (they were left with a
15054starting capital.)
15055
15056Some C macros whose only purpose is to allow the generation of 16-
15057bit code are now completely removed in the Linux code, increasing
15058readability and maintainability.
15059
15060----------------------------------------
15061
1506212 December 2002.  Summary of changes for version 20021212.
15063
15064
150651) ACPI CA Core Subsystem:
15066
15067Fixed a problem where the creation of a zero-length AML Buffer
15068would cause a fault.
15069
15070Fixed a problem where a Buffer object that pointed to a static AML
15071buffer (in an ACPI table) could inadvertently be deleted, causing
15072memory corruption.
15073
15074Fixed a problem where a user buffer (passed in to the external
15075ACPI CA interfaces) could be overwritten if the buffer was too
15076small to complete the operation, causing memory corruption.
15077
15078Fixed a problem in the Buffer-to-String conversion code where a
15079string of length one was always returned, regardless of the size
15080of the input Buffer object.
15081
15082Removed the NATIVE_CHAR data type across the entire source due to
15083lack of need and lack of consistent use.
15084
15085Code and Data Size: Current core subsystem library sizes are shown
15086below.  These are the code and data sizes for the acpica.lib
15087produced by the Microsoft Visual C++ 6.0 compiler, and these
15088values do not include any ACPI driver or OSPM code.  The debug
15089version of the code includes the debug output trace mechanism and
15090has a much larger code and data size.  Note that these values will
15091vary depending on the efficiency of the compiler and the compiler
15092options used during generation.
15093
15094  Previous Release
15095    Non-Debug Version:  72.1K Code,   9.5K Data,   81.6K Total
15096    Debug Version:     152.7K Code,  62.7K Data,  215.4K Total
15097  Current Release:
15098    Non-Debug Version:  72.0K Code,   9.5K Data,   81.5K Total
15099    Debug Version:     153.0K Code,  62.9K Data,  215.9K Total
15100
15101
15102----------------------------------------
1510305 December 2002.  Summary of changes for version 20021205.
15104
151051) ACPI CA Core Subsystem:
15106
15107Fixed a problem where a store to a String or Buffer object could
15108cause corruption of the DSDT if the object type being stored was
15109the same as the target object type and the length of the object
15110being stored was equal to or smaller than the original (existing)
15111target object.  This was seen to cause corruption of battery _BIF
15112buffers if the _BIF method modified the buffer on the fly.
15113
15114Fixed a problem where an internal error was generated if a control
15115method invocation was used in an OperationRegion, Buffer, or
15116Package declaration.  This was caused by the deferred parsing of
15117the control method and thus the deferred creation of the internal
15118method object.  The solution to this problem was to create the
15119internal method object at the moment the method is encountered in
15120the first pass - so that subsequent references to the method will
15121able to obtain the required parameter count and thus properly
15122parse the method invocation.  This problem presented itself as an
15123AE_AML_INTERNAL during the pass 1 parse phase during table load.
15124
15125Fixed a problem where the internal String object copy routine did
15126not always allocate sufficient memory for the target String object
15127and caused memory corruption.  This problem was seen to cause
15128"Allocation already present in list!" errors as memory allocation
15129became corrupted.
15130
15131Implemented a new function for the evaluation of namespace objects
15132that allows the specification of the allowable return object
15133types.  This simplifies a lot of code that checks for a return
15134object of one or more specific objects returned from the
15135evaluation (such as _STA, etc.)  This may become and external
15136function if it would be useful to ACPI-related drivers.
15137
15138Completed another round of prefixing #defines with "ACPI_" for
15139clarity.
15140
15141Completed additional code restructuring to allow more modular
15142linking for iASL compiler and AcpiExec.  Several files were split
15143creating new files.  New files:  nsparse.c dsinit.c evgpe.c
15144
15145Implemented an abort mechanism to terminate an executing control
15146method via the AML debugger.  This feature is useful for debugging
15147control methods that depend (wait) for specific hardware
15148responses.
15149
15150Code and Data Size: Current core subsystem library sizes are shown
15151below.  These are the code and data sizes for the acpica.lib
15152produced by the Microsoft Visual C++ 6.0 compiler, and these
15153values do not include any ACPI driver or OSPM code.  The debug
15154version of the code includes the debug output trace mechanism and
15155has a much larger code and data size.  Note that these values will
15156vary depending on the efficiency of the compiler and the compiler
15157options used during generation.
15158
15159  Previous Release
15160    Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
15161    Debug Version:     152.9K Code,  63.3K Data,  216.2K Total
15162  Current Release:
15163    Non-Debug Version:  72.1K Code,   9.5K Data,   81.6K Total
15164    Debug Version:     152.7K Code,  62.7K Data,  215.4K Total
15165
15166
151672) iASL Compiler/Disassembler
15168
15169Fixed a compiler code generation problem for "Interrupt" Resource
15170Descriptors.  If specified in the ASL, the optional "Resource
15171Source Index" and "Resource Source" fields were not inserted into
15172the correct location within the AML resource descriptor, creating
15173an invalid descriptor.
15174
15175Fixed a disassembler problem for "Interrupt" resource descriptors.
15176The optional "Resource Source Index" and "Resource Source" fields
15177were ignored.
15178
15179
15180----------------------------------------
1518122 November 2002.  Summary of changes for version 20021122.
15182
15183
151841) ACPI CA Core Subsystem:
15185
15186Fixed a reported problem where an object stored to a Method Local
15187or Arg was not copied to a new object during the store - the
15188object pointer was simply copied to the Local/Arg.  This caused
15189all subsequent operations on the Local/Arg to also affect the
15190original source of the store operation.
15191
15192Fixed a problem where a store operation to a Method Local or Arg
15193was not completed properly if the Local/Arg contained a reference
15194(from RefOf) to a named field.  The general-purpose store-to-
15195namespace-node code is now used so that this case is handled
15196automatically.
15197
15198Fixed a problem where the internal object copy routine would cause
15199a protection fault if the object being copied was a Package and
15200contained either 1) a NULL package element or 2) a nested sub-
15201package.
15202
15203Fixed a problem with the GPE initialization that resulted from an
15204ambiguity in the ACPI specification.  One section of the
15205specification states that both the address and length of the GPE
15206block must be zero if the block is not supported.  Another section
15207implies that only the address need be zero if the block is not
15208supported.  The code has been changed so that both the address and
15209the length must be non-zero to indicate a valid GPE block (i.e.,
15210if either the address or the length is zero, the GPE block is
15211invalid.)
15212
15213Code and Data Size: Current core subsystem library sizes are shown
15214below.  These are the code and data sizes for the acpica.lib
15215produced by the Microsoft Visual C++ 6.0 compiler, and these
15216values do not include any ACPI driver or OSPM code.  The debug
15217version of the code includes the debug output trace mechanism and
15218has a much larger code and data size.  Note that these values will
15219vary depending on the efficiency of the compiler and the compiler
15220options used during generation.
15221
15222  Previous Release
15223    Non-Debug Version:  71.3K Code,   9.0K Data,   80.3K Total
15224    Debug Version:     152.7K Code,  63.2K Data,  215.5K Total
15225  Current Release:
15226    Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
15227    Debug Version:     152.9K Code,  63.3K Data,  216.2K Total
15228
15229
152302) Linux
15231
15232Cleaned up EC driver. Exported an external EC read/write
15233interface. By going through this, other drivers (most notably
15234sonypi) will be able to serialize access to the EC.
15235
15236
152373) iASL Compiler/Disassembler
15238
15239Implemented support to optionally generate include files for both
15240ASM and C (the -i switch).  This simplifies BIOS development by
15241automatically creating include files that contain external
15242declarations for the symbols that are created within the
15243
15244(optionally generated) ASM and C AML source files.
15245
15246
15247----------------------------------------
1524815 November 2002.  Summary of changes for version 20021115.
15249
152501) ACPI CA Core Subsystem:
15251
15252Fixed a memory leak problem where an error during resolution of
15253
15254method arguments during a method invocation from another method
15255failed to cleanup properly by deleting all successfully resolved
15256argument objects.
15257
15258Fixed a problem where the target of the Index() operator was not
15259correctly constructed if the source object was a package.  This
15260problem has not been detected because the use of a target operand
15261with Index() is very rare.
15262
15263Fixed a problem with the Index() operator where an attempt was
15264made to delete the operand objects twice.
15265
15266Fixed a problem where an attempt was made to delete an operand
15267twice during execution of the CondRefOf() operator if the target
15268did not exist.
15269
15270Implemented the first of perhaps several internal create object
15271functions that create and initialize a specific object type.  This
15272consolidates duplicated code wherever the object is created, thus
15273shrinking the size of the subsystem.
15274
15275Implemented improved debug/error messages for errors that occur
15276during nested method invocations.  All executing method pathnames
15277are displayed (with the error) as the call stack is unwound - thus
15278simplifying debug.
15279
15280Fixed a problem introduced in the 10/02 release that caused
15281premature deletion of a buffer object if a buffer was used as an
15282ASL operand where an integer operand is required (Thus causing an
15283implicit object conversion from Buffer to Integer.)  The change in
15284the 10/02 release was attempting to fix a memory leak (albeit
15285incorrectly.)
15286
15287Code and Data Size: Current core subsystem library sizes are shown
15288below.  These are the code and data sizes for the acpica.lib
15289produced by the Microsoft Visual C++ 6.0 compiler, and these
15290values do not include any ACPI driver or OSPM code.  The debug
15291version of the code includes the debug output trace mechanism and
15292has a much larger code and data size.  Note that these values will
15293vary depending on the efficiency of the compiler and the compiler
15294options used during generation.
15295
15296  Previous Release
15297    Non-Debug Version:  71.9K Code,   9.1K Data,   81.0K Total
15298    Debug Version:     153.1K Code,  63.3K Data,  216.4K Total
15299  Current Release:
15300    Non-Debug Version:  71.3K Code,   9.0K Data,   80.3K Total
15301    Debug Version:     152.7K Code,  63.2K Data,  215.5K Total
15302
15303
153042) Linux
15305
15306Changed the implementation of the ACPI semaphores to use down()
15307instead of down_interruptable().  It is important that the
15308execution of ACPI control methods not be interrupted by signals.
15309Methods must run to completion, or the system may be left in an
15310unknown/unstable state.
15311
15312Fixed a compilation error when CONFIG_SOFTWARE_SUSPEND is not set.
15313(Shawn Starr)
15314
15315
153163) iASL Compiler/Disassembler
15317
15318
15319Changed the default location of output files.  All output files
15320are now placed in the current directory by default instead of in
15321the directory of the source file.  This change may affect some
15322existing makefiles, but it brings the behavior of the compiler in
15323line with other similar tools.  The location of the output files
15324can be overridden with the -p command line switch.
15325
15326
15327----------------------------------------
1532811 November 2002.  Summary of changes for version 20021111.
15329
15330
153310) ACPI Specification 2.0B is released and is now available at:
15332http://www.acpi.info/index.html
15333
15334
153351) ACPI CA Core Subsystem:
15336
15337Implemented support for the ACPI 2.0 SMBus Operation Regions.
15338This includes the early detection and handoff of the request to
15339the SMBus region handler (avoiding all of the complex field
15340support code), and support for the bidirectional return packet
15341from an SMBus write operation.  This paves the way for the
15342development of SMBus drivers in each host operating system.
15343
15344Fixed a problem where the semaphore WAIT_FOREVER constant was
15345defined as 32 bits, but must be 16 bits according to the ACPI
15346specification.  This had the side effect of causing ASL
15347Mutex/Event timeouts even though the ASL code requested a wait
15348forever.  Changed all internal references to the ACPI timeout
15349parameter to 16 bits to prevent future problems.  Changed the name
15350of WAIT_FOREVER to ACPI_WAIT_FOREVER.
15351
15352Code and Data Size: Current core subsystem library sizes are shown
15353below.  These are the code and data sizes for the acpica.lib
15354produced by the Microsoft Visual C++ 6.0 compiler, and these
15355values do not include any ACPI driver or OSPM code.  The debug
15356version of the code includes the debug output trace mechanism and
15357has a much larger code and data size.  Note that these values will
15358vary depending on the efficiency of the compiler and the compiler
15359options used during generation.
15360
15361  Previous Release
15362    Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
15363    Debug Version:     152.3K Code,  63.0K Data,  215.3K Total
15364  Current Release:
15365    Non-Debug Version:  71.9K Code,   9.1K Data,   81.0K Total
15366    Debug Version:     153.1K Code,  63.3K Data,  216.4K Total
15367
15368
153692) Linux
15370
15371Module loading/unloading fixes (John Cagle)
15372
15373
153743) iASL Compiler/Disassembler
15375
15376Added support for the SMBBlockProcessCall keyword (ACPI 2.0)
15377
15378Implemented support for the disassembly of all SMBus protocol
15379keywords (SMBQuick, SMBWord, etc.)
15380
15381----------------------------------------
1538201 November 2002.  Summary of changes for version 20021101.
15383
15384
153851) ACPI CA Core Subsystem:
15386
15387Fixed a problem where platforms that have a GPE1 block but no GPE0
15388block were not handled correctly.  This resulted in a "GPE
15389overlap" error message.  GPE0 is no longer required.
15390
15391Removed code added in the previous release that inserted nodes
15392into the namespace in alphabetical order.  This caused some side-
15393effects on various machines.  The root cause of the problem is
15394still under investigation since in theory, the internal ordering
15395of the namespace nodes should not matter.
15396
15397
15398Enhanced error reporting for the case where a named object is not
15399found during control method execution.  The full ACPI namepath
15400(name reference) of the object that was not found is displayed in
15401this case.
15402
15403Note: as a result of the overhaul of the namespace object types in
15404the previous release, the namespace nodes for the predefined
15405scopes (_TZ, _PR, etc.) are now of the type ACPI_TYPE_LOCAL_SCOPE
15406instead of ACPI_TYPE_ANY.  This simplifies the namespace
15407management code but may affect code that walks the namespace tree
15408looking for specific object types.
15409
15410Code and Data Size: Current core subsystem library sizes are shown
15411below.  These are the code and data sizes for the acpica.lib
15412produced by the Microsoft Visual C++ 6.0 compiler, and these
15413values do not include any ACPI driver or OSPM code.  The debug
15414version of the code includes the debug output trace mechanism and
15415has a much larger code and data size.  Note that these values will
15416vary depending on the efficiency of the compiler and the compiler
15417options used during generation.
15418
15419  Previous Release
15420    Non-Debug Version:  70.7K Code,   8.6K Data,   79.3K Total
15421    Debug Version:     151.7K Code,  62.4K Data,  214.1K Total
15422  Current Release:
15423    Non-Debug Version:  71.4K Code,   9.0K Data,   80.4K Total
15424    Debug Version:     152.3K Code,  63.0K Data,  215.3K Total
15425
15426
154272) Linux
15428
15429Fixed a problem introduced in the previous release where the
15430Processor and Thermal objects were not recognized and installed in
15431/proc.  This was related to the scope type change described above.
15432
15433
154343) iASL Compiler/Disassembler
15435
15436Implemented the -g option to get all of the required ACPI tables
15437from the registry and save them to files (Windows version of the
15438compiler only.)  The required tables are the FADT, FACS, and DSDT.
15439
15440Added ACPI table checksum validation during table disassembly in
15441order to catch corrupted tables.
15442
15443
15444----------------------------------------
1544522 October 2002.  Summary of changes for version 20021022.
15446
154471) ACPI CA Core Subsystem:
15448
15449Implemented a restriction on the Scope operator that the target
15450must already exist in the namespace at the time the operator is
15451encountered (during table load or method execution).  In other
15452words, forward references are not allowed and Scope() cannot
15453create a new object. This changes the previous behavior where the
15454interpreter would create the name if not found.  This new behavior
15455correctly enables the search-to-root algorithm during namespace
15456lookup of the target name.  Because of this upsearch, this fixes
15457the known Compaq _SB_.OKEC problem and makes both the AML
15458interpreter and iASL compiler compatible with other ACPI
15459implementations.
15460
15461Completed a major overhaul of the internal ACPI object types for
15462the ACPI Namespace and the associated operand objects.  Many of
15463these types had become obsolete with the introduction of the two-
15464pass namespace load.  This cleanup simplifies the code and makes
15465the entire namespace load mechanism much clearer and easier to
15466understand.
15467
15468Improved debug output for tracking scope opening/closing to help
15469diagnose scoping issues.  The old scope name as well as the new
15470scope name are displayed.  Also improved error messages for
15471problems with ASL Mutex objects and error messages for GPE
15472problems.
15473
15474Cleaned up the namespace dump code, removed obsolete code.
15475
15476All string output (for all namespace/object dumps) now uses the
15477common ACPI string output procedure which handles escapes properly
15478and does not emit non-printable characters.
15479
15480Fixed some issues with constants in the 64-bit version of the
15481local C library (utclib.c)
15482
15483
154842) Linux
15485
15486EC Driver:  No longer attempts to acquire the Global Lock at
15487interrupt level.
15488
15489
154903) iASL Compiler/Disassembler
15491
15492Implemented ACPI 2.0B grammar change that disallows all Type 1 and
154932 opcodes outside of a control method.  This means that the
15494"executable" operators (versus the "namespace" operators) cannot
15495be used at the table level; they can only be used within a control
15496method.
15497
15498Implemented the restriction on the Scope() operator where the
15499target must already exist in the namespace at the time the
15500operator is encountered (during ASL compilation). In other words,
15501forward references are not allowed and Scope() cannot create a new
15502object.  This makes the iASL compiler compatible with other ACPI
15503implementations and makes the Scope() implementation adhere to the
15504ACPI specification.
15505
15506Fixed a problem where namepath optimization for the Alias operator
15507was optimizing the wrong path (of the two namepaths.)  This caused
15508a "Missing alias link" error message.
15509
15510Fixed a problem where an "unknown reserved name" warning could be
15511incorrectly generated for names like "_SB" when the trailing
15512underscore is not used in the original ASL.
15513
15514Fixed a problem where the reserved name check did not handle
15515NamePaths with multiple NameSegs correctly.  The first nameseg of
15516the NamePath was examined instead of the last NameSeg.
15517
15518
15519----------------------------------------
15520
1552102 October 2002.  Summary of changes for this release.
15522
15523
155241) ACPI CA Core Subsystem version 20021002:
15525
15526Fixed a problem where a store/copy of a string to an existing
15527string did not always set the string length properly in the String
15528object.
15529
15530Fixed a reported problem with the ToString operator where the
15531behavior was identical to the ToHexString operator instead of just
15532simply converting a raw buffer to a string data type.
15533
15534Fixed a problem where CopyObject and the other "explicit"
15535conversion operators were not updating the internal namespace node
15536type as part of the store operation.
15537
15538Fixed a memory leak during implicit source operand conversion
15539where the original object was not deleted if it was converted to a
15540new object of a different type.
15541
15542Enhanced error messages for all problems associated with namespace
15543lookups.  Common procedure generates and prints the lookup name as
15544well as the formatted status.
15545
15546Completed implementation of a new design for the Alias support
15547within the namespace.  The existing design did not handle the case
15548where a new object was assigned to one of the two names due to the
15549use of an explicit conversion operator, resulting in the two names
15550pointing to two different objects.  The new design simply points
15551the Alias name to the original name node - not to the object.
15552This results in a level of indirection that must be handled in the
15553name resolution mechanism.
15554
15555Code and Data Size: Current core subsystem library sizes are shown
15556below.  These are the code and data sizes for the acpica.lib
15557produced by the Microsoft Visual C++ 6.0 compiler, and these
15558values do not include any ACPI driver or OSPM code.  The debug
15559version of the code includes the debug output trace mechanism and
15560has a larger code and data size.  Note that these values will vary
15561depending on the efficiency of the compiler and the compiler
15562options used during generation.
15563
15564  Previous Release
15565    Non-Debug Version:  69.6K Code,   8.3K Data,   77.9K Total
15566    Debug Version:     150.0K Code,  61.7K Data,  211.7K Total
15567  Current Release:
15568    Non-Debug Version:  70.7K Code,   8.6K Data,   79.3K Total
15569    Debug Version:     151.7K Code,  62.4K Data,  214.1K Total
15570
15571
155722) Linux
15573
15574Initialize thermal driver's timer before it is used. (Knut
15575Neumann)
15576
15577Allow handling negative celsius values. (Kochi Takayoshi)
15578
15579Fix thermal management and make trip points. R/W (Pavel Machek)
15580
15581Fix /proc/acpi/sleep. (P. Christeas)
15582
15583IA64 fixes. (David Mosberger)
15584
15585Fix reversed logic in blacklist code. (Sergio Monteiro Basto)
15586
15587Replace ACPI_DEBUG define with ACPI_DEBUG_OUTPUT. (Dominik
15588Brodowski)
15589
15590
155913) iASL Compiler/Disassembler
15592
15593Clarified some warning/error messages.
15594
15595
15596----------------------------------------
1559718 September 2002.  Summary of changes for this release.
15598
15599
156001) ACPI CA Core Subsystem version 20020918:
15601
15602Fixed a reported problem with reference chaining (via the Index()
15603and RefOf() operators) in the ObjectType() and SizeOf() operators.
15604The definition of these operators includes the dereferencing of
15605all chained references to return information on the base object.
15606
15607Fixed a problem with stores to indexed package elements - the
15608existing code would not complete the store if an "implicit
15609conversion" was not performed.  In other words, if the existing
15610object (package element) was to be replaced completely, the code
15611didn't handle this case.
15612
15613Relaxed typechecking on the ASL "Scope" operator to allow the
15614target name to refer to an object of type Integer, String, or
15615Buffer, in addition to the scoping object types (Device,
15616predefined Scopes, Processor, PowerResource, and ThermalZone.)
15617This allows existing AML code that has workarounds for a bug in
15618Windows to function properly.  A warning is issued, however.  This
15619affects both the AML interpreter and the iASL compiler. Below is
15620an example of this type of ASL code:
15621
15622      Name(DEB,0x00)
15623      Scope(DEB)
15624      {
15625
15626Fixed some reported problems with 64-bit integer support in the
15627local implementation of C library functions (clib.c)
15628
15629
156302) Linux
15631
15632Use ACPI fix map region instead of IOAPIC region, since it is
15633undefined in non-SMP.
15634
15635Ensure that the SCI has the proper polarity and trigger, even on
15636systems that do not have an interrupt override entry in the MADT.
15637
156382.5 big driver reorganization (Pat Mochel)
15639
15640Use early table mapping code from acpitable.c (Andi Kleen)
15641
15642New blacklist entries (Andi Kleen)
15643
15644Blacklist improvements. Split blacklist code out into a separate
15645file. Move checking the blacklist to very early. Previously, we
15646would use ACPI tables, and then halfway through init, check the
15647blacklist -- too late. Now, it's early enough to completely fall-
15648back to non-ACPI.
15649
15650
156513) iASL Compiler/Disassembler version 20020918:
15652
15653Fixed a problem where the typechecking code didn't know that an
15654alias could point to a method.  In other words, aliases were not
15655being dereferenced during typechecking.
15656
15657
15658----------------------------------------
1565929 August 2002.  Summary of changes for this release.
15660
156611) ACPI CA Core Subsystem Version 20020829:
15662
15663If the target of a Scope() operator already exists, it must be an
15664object type that actually opens a scope -- such as a Device,
15665Method, Scope, etc.  This is a fatal runtime error.  Similar error
15666check has been added to the iASL compiler also.
15667
15668Tightened up the namespace load to disallow multiple names in the
15669same scope.  This previously was allowed if both objects were of
15670the same type.  (i.e., a lookup was the same as entering a new
15671name).
15672
15673
156742) Linux
15675
15676Ensure that the ACPI interrupt has the proper trigger and
15677polarity.
15678
15679local_irq_disable is extraneous. (Matthew Wilcox)
15680
15681Make "acpi=off" actually do what it says, and not use the ACPI
15682interpreter *or* the tables.
15683
15684Added arch-neutral support for parsing SLIT and SRAT tables (Kochi
15685Takayoshi)
15686
15687
156883) iASL Compiler/Disassembler  Version 20020829:
15689
15690Implemented namepath optimization for name declarations.  For
15691example, a declaration like "Method (\_SB_.ABCD)" would get
15692optimized to "Method (ABCD)" if the declaration is within the
15693\_SB_ scope.  This optimization is in addition to the named
15694reference path optimization first released in the previous
15695version. This would seem to complete all possible optimizations
15696for namepaths within the ASL/AML.
15697
15698If the target of a Scope() operator already exists, it must be an
15699object type that actually opens a scope -- such as a Device,
15700Method, Scope, etc.
15701
15702Implemented a check and warning for unreachable code in the same
15703block below a Return() statement.
15704
15705Fixed a problem where the listing file was not generated if the
15706compiler aborted if the maximum error count was exceeded (200).
15707
15708Fixed a problem where the typechecking of method return values was
15709broken.  This includes the check for a return value when the
15710method is invoked as a TermArg (a return value is expected.)
15711
15712Fixed a reported problem where EOF conditions during a quoted
15713string or comment caused a fault.
15714
15715
15716----------------------------------------
1571715 August 2002.  Summary of changes for this release.
15718
157191) ACPI CA Core Subsystem Version 20020815:
15720
15721Fixed a reported problem where a Store to a method argument that
15722contains a reference did not perform the indirect store correctly.
15723This problem was created during the conversion to the new
15724reference object model - the indirect store to a method argument
15725code was not updated to reflect the new model.
15726
15727Reworked the ACPI mode change code to better conform to ACPI 2.0,
15728handle corner cases, and improve code legibility (Kochi Takayoshi)
15729
15730Fixed a problem with the pathname parsing for the carat (^)
15731prefix.  The heavy use of the carat operator by the new namepath
15732optimization in the iASL compiler uncovered a problem with the AML
15733interpreter handling of this prefix.  In the case where one or
15734more carats precede a single nameseg, the nameseg was treated as
15735standalone and the search rule (to root) was inadvertently
15736applied.  This could cause both the iASL compiler and the
15737interpreter to find the wrong object or to miss the error that
15738should occur if the object does not exist at that exact pathname.
15739
15740Found and fixed the problem where the HP Pavilion DSDT would not
15741load.  This was a relatively minor tweak to the table loading code
15742(a problem caused by the unexpected encounter with a method
15743invocation not within a control method), but it does not solve the
15744overall issue of the execution of AML code at the table level.
15745This investigation is still ongoing.
15746
15747Code and Data Size: Current core subsystem library sizes are shown
15748below.  These are the code and data sizes for the acpica.lib
15749produced by the Microsoft Visual C++ 6.0 compiler, and these
15750values do not include any ACPI driver or OSPM code.  The debug
15751version of the code includes the debug output trace mechanism and
15752has a larger code and data size.  Note that these values will vary
15753depending on the efficiency of the compiler and the compiler
15754options used during generation.
15755
15756  Previous Release
15757    Non-Debug Version:  69.1K Code,   8.2K Data,   77.3K Total
15758    Debug Version:     149.4K Code,  61.6K Data,  211.0K Total
15759  Current Release:
15760    Non-Debug Version:  69.6K Code,   8.3K Data,   77.9K Total
15761    Debug Version:     150.0K Code,  61.7K Data,  211.7K Total
15762
15763
157642) Linux
15765
15766Remove redundant slab.h include (Brad Hards)
15767
15768Fix several bugs in thermal.c (Herbert Nachtnebel)
15769
15770Make CONFIG_ACPI_BOOT work properly (Pavel Machek)
15771
15772Change acpi_system_suspend to use updated irq functions (Pavel
15773Machek)
15774
15775Export acpi_get_firmware_table (Matthew Wilcox)
15776
15777Use proper root proc entry for ACPI (Kochi Takayoshi)
15778
15779Fix early-boot table parsing (Bjorn Helgaas)
15780
15781
157823) iASL Compiler/Disassembler
15783
15784Reworked the compiler options to make them more consistent and to
15785use two-letter options where appropriate.  We were running out of
15786sensible letters.   This may break some makefiles, so check the
15787current options list by invoking the compiler with no parameters.
15788
15789Completed the design and implementation of the ASL namepath
15790optimization option for the compiler.  This option optimizes all
15791references to named objects to the shortest possible path.  The
15792first attempt tries to utilize a single nameseg (4 characters) and
15793the "search-to-root" algorithm used by the interpreter.  If that
15794cannot be used (because either the name is not in the search path
15795or there is a conflict with another object with the same name),
15796the pathname is optimized using the carat prefix (usually a
15797shorter string than specifying the entire path from the root.)
15798
15799Implemented support to obtain the DSDT from the Windows registry
15800(when the disassembly option is specified with no input file).
15801Added this code as the implementation for AcpiOsTableOverride in
15802the Windows OSL.  Migrated the 16-bit code (used in the AcpiDump
15803utility) to scan memory for the DSDT to the AcpiOsTableOverride
15804function in the DOS OSL to make the disassembler truly OS
15805independent.
15806
15807Implemented a new option to disassemble and compile in one step.
15808When used without an input filename, this option will grab the
15809DSDT from the local machine, disassemble it, and compile it in one
15810step.
15811
15812Added a warning message for invalid escapes (a backslash followed
15813by any character other than the allowable escapes).  This catches
15814the quoted string error "\_SB_" (which should be "\\_SB_" ).
15815
15816Also, there are numerous instances in the ACPI specification where
15817this error occurs.
15818
15819Added a compiler option to disable all optimizations.  This is
15820basically the "compatibility mode" because by using this option,
15821the AML code will come out exactly the same as other ASL
15822compilers.
15823
15824Added error messages for incorrectly ordered dependent resource
15825functions.  This includes: missing EndDependentFn macro at end of
15826dependent resource list, nested dependent function macros (both
15827start and end), and missing StartDependentFn macro.  These are
15828common errors that should be caught at compile time.
15829
15830Implemented _OSI support for the disassembler and compiler.  _OSI
15831must be included in the namespace for proper disassembly (because
15832the disassembler must know the number of arguments.)
15833
15834Added an "optimization" message type that is optional (off by
15835default).  This message is used for all optimizations - including
15836constant folding, integer optimization, and namepath optimization.
15837
15838----------------------------------------
1583925 July 2002.  Summary of changes for this release.
15840
15841
158421) ACPI CA Core Subsystem Version 20020725:
15843
15844The AML Disassembler has been enhanced to produce compilable ASL
15845code and has been integrated into the iASL compiler (see below) as
15846well as the single-step disassembly for the AML debugger and the
15847disassembler for the AcpiDump utility.  All ACPI 2.0A opcodes,
15848resource templates and macros are fully supported.  The
15849disassembler has been tested on over 30 different AML files,
15850producing identical AML when the resulting disassembled ASL file
15851is recompiled with the same ASL compiler.
15852
15853Modified the Resource Manager to allow zero interrupts and zero
15854dma channels during the GetCurrentResources call.  This was
15855causing problems on some platforms.
15856
15857Added the AcpiOsRedirectOutput interface to the OSL to simplify
15858output redirection for the AcpiOsPrintf and AcpiOsVprintf
15859interfaces.
15860
15861Code and Data Size: Current core subsystem library sizes are shown
15862below.  These are the code and data sizes for the acpica.lib
15863produced by the Microsoft Visual C++ 6.0 compiler, and these
15864values do not include any ACPI driver or OSPM code.  The debug
15865version of the code includes the debug output trace mechanism and
15866has a larger code and data size.  Note that these values will vary
15867depending on the efficiency of the compiler and the compiler
15868options used during generation.
15869
15870  Previous Release
15871    Non-Debug Version:  68.7K Code,   7.4K Data,   76.1K Total
15872    Debug Version:     142.9K Code,  58.7K Data,  201.6K Total
15873  Current Release:
15874    Non-Debug Version:  69.1K Code,   8.2K Data,   77.3K Total
15875    Debug Version:     149.4K Code,  61.6K Data,  211.0K Total
15876
15877
158782) Linux
15879
15880Fixed a panic in the EC driver (Dominik Brodowski)
15881
15882Implemented checksum of the R/XSDT itself during Linux table scan
15883(Richard Schaal)
15884
15885
158863) iASL compiler
15887
15888The AML disassembler is integrated into the compiler.  The "-d"
15889option invokes the disassembler  to completely disassemble an
15890input AML file, producing as output a text ASL file with the
15891extension ".dsl" (to avoid name collisions with existing .asl
15892source files.)  A future enhancement will allow the disassembler
15893to obtain the BIOS DSDT from the registry under Windows.
15894
15895Fixed a problem with the VendorShort and VendorLong resource
15896descriptors where an invalid AML sequence was created.
15897
15898Implemented a fix for BufferData term in the ASL parser.  It was
15899inadvertently defined twice, allowing invalid syntax to pass and
15900causing reduction conflicts.
15901
15902Fixed a problem where the Ones opcode could get converted to a
15903value of zero if "Ones" was used where a byte, word or dword value
15904was expected.  The 64-bit value is now truncated to the correct
15905size with the correct value.
15906
15907
15908
15909----------------------------------------
1591002 July 2002.  Summary of changes for this release.
15911
15912
159131) ACPI CA Core Subsystem Version 20020702:
15914
15915The Table Manager code has been restructured to add several new
15916features.  Tables that are not required by the core subsystem
15917(other than the FADT, DSDT, FACS, PSDTs, etc.) are no longer
15918validated in any way and are returned from AcpiGetFirmwareTable if
15919requested.  The AcpiOsTableOverride interface is now called for
15920each table that is loaded by the subsystem in order to allow the
15921host to override any table it chooses.  Previously, only the DSDT
15922could be overridden.  Added one new files, tbrsdt.c and
15923tbgetall.c.
15924
15925Fixed a problem with the conversion of internal package objects to
15926external objects (when a package is returned from a control
15927method.)  The return buffer length was set to zero instead of the
15928proper length of the package object.
15929
15930Fixed a reported problem with the use of the RefOf and DeRefOf
15931operators when passing reference arguments to control methods.  A
15932new type of Reference object is used internally for references
15933produced by the RefOf operator.
15934
15935Added additional error messages in the Resource Manager to explain
15936AE_BAD_DATA errors when they occur during resource parsing.
15937
15938Split the AcpiEnableSubsystem into two primitives to enable a
15939finer granularity initialization sequence.  These two calls should
15940be called in this order: AcpiEnableSubsystem (flags),
15941AcpiInitializeObjects (flags).  The flags parameter remains the
15942same.
15943
15944
159452) Linux
15946
15947Updated the ACPI utilities module to understand the new style of
15948fully resolved package objects that are now returned from the core
15949subsystem.  This eliminates errors of the form:
15950
15951    ACPI: PCI Interrupt Routing Table [\_SB_.PCI0.PPB_._PRT]
15952    acpi_utils-0430 [145] acpi_evaluate_reference:
15953        Invalid element in package (not a device reference)
15954
15955The method evaluation utility uses the new buffer allocation
15956scheme instead of calling AcpiEvaluate Object twice.
15957
15958Added support for ECDT. This allows the use of the Embedded
15959
15960Controller before the namespace has been fully initialized, which
15961is necessary for ACPI 2.0 support, and for some laptops to
15962initialize properly. (Laptops using ECDT are still rare, so only
15963limited testing was performed of the added functionality.)
15964
15965Fixed memory leaks in the EC driver.
15966
15967Eliminated a brittle code structure in acpi_bus_init().
15968
15969Eliminated the acpi_evaluate() helper function in utils.c. It is
15970no longer needed since acpi_evaluate_object can optionally
15971allocate memory for the return object.
15972
15973Implemented fix for keyboard hang when getting battery readings on
15974some systems (Stephen White)
15975
15976PCI IRQ routing update (Dominik Brodowski)
15977
15978Fix an ifdef to allow compilation on UP with LAPIC but no IOAPIC
15979support
15980
15981----------------------------------------
1598211 June 2002.  Summary of changes for this release.
15983
15984
159851) ACPI CA Core Subsystem Version 20020611:
15986
15987Fixed a reported problem where constants such as Zero and One
15988appearing within _PRT packages were not handled correctly within
15989the resource manager code.  Originally reported against the ASL
15990compiler because the code generator now optimizes integers to
15991their minimal AML representation (i.e. AML constants if possible.)
15992The _PRT code now handles all AML constant opcodes correctly
15993(Zero, One, Ones, Revision).
15994
15995Fixed a problem with the Concatenate operator in the AML
15996interpreter where a buffer result object was incorrectly marked as
15997not fully evaluated, causing a run-time error of AE_AML_INTERNAL.
15998
15999All package sub-objects are now fully resolved before they are
16000returned from the external ACPI interfaces.  This means that name
16001strings are resolved to object handles, and constant operators
16002(Zero, One, Ones, Revision) are resolved to Integers.
16003
16004Implemented immediate resolution of the AML Constant opcodes
16005(Zero, One, Ones, Revision) to Integer objects upon detection
16006within the AML stream. This has simplified and reduced the
16007generated code size of the subsystem by eliminating about 10
16008switch statements for these constants (which previously were
16009contained in Reference objects.)  The complicating issues are that
16010the Zero opcode is used as a "placeholder" for unspecified
16011optional target operands and stores to constants are defined to be
16012no-ops.
16013
16014Code and Data Size: Current core subsystem library sizes are shown
16015below. These are the code and data sizes for the acpica.lib
16016produced by the Microsoft Visual C++ 6.0 compiler, and these
16017values do not include any ACPI driver or OSPM code.  The debug
16018version of the code includes the debug output trace mechanism and
16019has a larger code and data size.  Note that these values will vary
16020depending on the efficiency of the compiler and the compiler
16021options used during generation.
16022
16023  Previous Release
16024    Non-Debug Version:  69.3K Code,   7.4K Data,   76.7K Total
16025    Debug Version:     143.8K Code,  58.8K Data,  202.6K Total
16026  Current Release:
16027    Non-Debug Version:  68.7K Code,   7.4K Data,   76.1K Total
16028    Debug Version:     142.9K Code,  58.7K Data,  201.6K Total
16029
16030
160312) Linux
16032
16033
16034Added preliminary support for obtaining _TRA data for PCI root
16035bridges (Bjorn Helgaas).
16036
16037
160383) iASL Compiler Version X2046:
16039
16040Fixed a problem where the "_DDN" reserved name was defined to be a
16041control method with one argument.  There are no arguments, and
16042_DDN does not have to be a control method.
16043
16044Fixed a problem with the Linux version of the compiler where the
16045source lines printed with error messages were the wrong lines.
16046This turned out to be the "LF versus CR/LF" difference between
16047Windows and Unix.  This appears to be the longstanding issue
16048concerning listing output and error messages.
16049
16050Fixed a problem with the Linux version of compiler where opcode
16051names within error messages were wrong.  This was caused by a
16052slight difference in the output of the Flex tool on Linux versus
16053Windows.
16054
16055Fixed a problem with the Linux compiler where the hex output files
16056contained some garbage data caused by an internal buffer overrun.
16057
16058
16059----------------------------------------
1606017 May 2002.  Summary of changes for this release.
16061
16062
160631) ACPI CA Core Subsystem Version 20020517:
16064
16065Implemented a workaround to an BIOS bug discovered on the HP
16066OmniBook where the FADT revision number and the table size are
16067inconsistent (ACPI 2.0 revision vs. ACPI 1.0 table size).  The new
16068behavior is to fallback to using only the ACPI 1.0 fields of the
16069FADT if the table is too small to be a ACPI 2.0 table as claimed
16070by the revision number.  Although this is a BIOS bug, this is a
16071case where the workaround is simple enough and with no side
16072effects, so it seemed prudent to add it.  A warning message is
16073issued, however.
16074
16075Implemented minimum size checks for the fixed-length ACPI tables -
16076- the FADT and FACS, as well as consistency checks between the
16077revision number and the table size.
16078
16079Fixed a reported problem in the table override support where the
16080new table pointer was incorrectly treated as a physical address
16081instead of a logical address.
16082
16083Eliminated the use of the AE_AML_ERROR exception and replaced it
16084with more descriptive codes.
16085
16086Fixed a problem where an exception would occur if an ASL Field was
16087defined with no named Field Units underneath it (used by some
16088index fields).
16089
16090Code and Data Size: Current core subsystem library sizes are shown
16091below.  These are the code and data sizes for the acpica.lib
16092produced by the Microsoft Visual C++ 6.0 compiler, and these
16093values do not include any ACPI driver or OSPM code.  The debug
16094version of the code includes the debug output trace mechanism and
16095has a larger code and data size.  Note that these values will vary
16096depending on the efficiency of the compiler and the compiler
16097options used during generation.
16098
16099  Previous Release
16100    Non-Debug Version:  68.8K Code,   7.1K Data,   75.9K Total
16101    Debug Version:     142.9K Code,  58.4K Data,  201.3K Total
16102  Current Release:
16103    Non-Debug Version:  69.3K Code,   7.4K Data,   76.7K Total
16104    Debug Version:     143.8K Code,  58.8K Data,  202.6K Total
16105
16106
16107
161082) Linux
16109
16110Much work done on ACPI init (MADT and PCI IRQ routing support).
16111(Paul D. and Dominik Brodowski)
16112
16113Fix PCI IRQ-related panic on boot (Sam Revitch)
16114
16115Set BM_ARB_DIS when entering a sleep state (Ducrot Bruno)
16116
16117Fix "MHz" typo (Dominik Brodowski)
16118
16119Fix RTC year 2000 issue (Dominik Brodowski)
16120
16121Preclude multiple button proc entries (Eric Brunet)
16122
16123Moved arch-specific code out of include/platform/aclinux.h
16124
161253) iASL Compiler Version X2044:
16126
16127Implemented error checking for the string used in the EISAID macro
16128(Usually used in the definition of the _HID object.)  The code now
16129strictly enforces the PnP format - exactly 7 characters, 3
16130uppercase letters and 4 hex digits.
16131
16132If a raw string is used in the definition of the _HID object
16133(instead of the EISAID macro), the string must contain all
16134alphanumeric characters (e.g., "*PNP0011" is not allowed because
16135of the asterisk.)
16136
16137Implemented checking for invalid use of ACPI reserved names for
16138most of the name creation operators (Name, Device, Event, Mutex,
16139OperationRegion, PowerResource, Processor, and ThermalZone.)
16140Previously, this check was only performed for control methods.
16141
16142Implemented an additional check on the Name operator to emit an
16143error if a reserved name that must be implemented in ASL as a
16144control method is used.  We know that a reserved name must be a
16145method if it is defined with input arguments.
16146
16147The warning emitted when a namespace object reference is not found
16148during the cross reference phase has been changed into an error.
16149The "External" directive should be used for names defined in other
16150modules.
16151
16152
161534) Tools and Utilities
16154
16155The 16-bit tools (adump16 and aexec16) have been regenerated and
16156tested.
16157
16158Fixed a problem with the output of both acpidump and adump16 where
16159the indentation of closing parentheses and brackets was not
16160
16161aligned properly with the parent block.
16162
16163
16164----------------------------------------
1616503 May 2002.  Summary of changes for this release.
16166
16167
161681) ACPI CA Core Subsystem Version 20020503:
16169
16170Added support a new OSL interface that allows the host operating
16171
16172system software to override the DSDT found in the firmware -
16173AcpiOsTableOverride.  With this interface, the OSL can examine the
16174version of the firmware DSDT and replace it with a different one
16175if desired.
16176
16177Added new external interfaces for accessing ACPI registers from
16178device drivers and other system software - AcpiGetRegister and
16179AcpiSetRegister.  This was simply an externalization of the
16180existing AcpiHwBitRegister interfaces.
16181
16182Fixed a regression introduced in the previous build where the
16183ASL/AML CreateField operator always returned an error,
16184"destination must be a NS Node".
16185
16186Extended the maximum time (before failure) to successfully enable
16187ACPI mode to 3 seconds.
16188
16189Code and Data Size: Current core subsystem library sizes are shown
16190below.  These are the code and data sizes for the acpica.lib
16191produced by the Microsoft Visual C++ 6.0 compiler, and these
16192values do not include any ACPI driver or OSPM code.  The debug
16193version of the code includes the debug output trace mechanism and
16194has a larger code and data size.  Note that these values will vary
16195depending on the efficiency of the compiler and the compiler
16196options used during generation.
16197
16198  Previous Release
16199    Non-Debug Version:  68.5K Code,   7.0K Data,   75.5K Total
16200    Debug Version:     142.4K Code,  58.3K Data,  200.7K Total
16201  Current Release:
16202    Non-Debug Version:  68.8K Code,   7.1K Data,   75.9K Total
16203    Debug Version:     142.9K Code,  58.4K Data,  201.3K Total
16204
16205
162062) Linux
16207
16208Enhanced ACPI init code for SMP. We are now fully MPS and $PIR-
16209free. While 3 out of 4 of our in-house systems work fine, the last
16210one still hangs when testing the LAPIC timer.
16211
16212Renamed many files in 2.5 kernel release to omit "acpi_" from the
16213name.
16214
16215Added warning on boot for Presario 711FR.
16216
16217Sleep improvements (Pavel Machek)
16218
16219ACPI can now be built without CONFIG_PCI enabled.
16220
16221IA64: Fixed memory map functions (JI Lee)
16222
16223
162243) iASL Compiler Version X2043:
16225
16226Added support to allow the compiler to be integrated into the MS
16227VC++ development environment for one-button compilation of single
16228files or entire projects -- with error-to-source-line mapping.
16229
16230Implemented support for compile-time constant folding for the
16231Type3, Type4, and Type5 opcodes first defined in the ACPI 2.0
16232specification.  This allows the ASL writer to use expressions
16233instead of Integer/Buffer/String constants in terms that must
16234evaluate to constants at compile time and will also simplify the
16235emitted AML in any such sub-expressions that can be folded
16236(evaluated at compile-time.)  This increases the size of the
16237compiler significantly because a portion of the ACPI CA AML
16238interpreter is included within the compiler in order to pre-
16239evaluate constant expressions.
16240
16241
16242Fixed a problem with the "Unicode" ASL macro that caused the
16243compiler to fault.  (This macro is used in conjunction with the
16244_STR reserved name.)
16245
16246Implemented an AML opcode optimization to use the Zero, One, and
16247Ones opcodes where possible to further reduce the size of integer
16248constants and thus reduce the overall size of the generated AML
16249code.
16250
16251Implemented error checking for new reserved terms for ACPI version
162522.0A.
16253
16254Implemented the -qr option to display the current list of ACPI
16255reserved names known to the compiler.
16256
16257Implemented the -qc option to display the current list of ASL
16258operators that are allowed within constant expressions and can
16259therefore be folded at compile time if the operands are constants.
16260
16261
162624) Documentation
16263
16264Updated the Programmer's Reference for new interfaces, data types,
16265and memory allocation model options.
16266
16267Updated the iASL Compiler User Reference to apply new format and
16268add information about new features and options.
16269
16270----------------------------------------
1627119 April 2002.  Summary of changes for this release.
16272
162731) ACPI CA Core Subsystem Version 20020419:
16274
16275The source code base for the Core Subsystem has been completely
16276cleaned with PC-lint (FlexLint) for both 32-bit and 64-bit
16277versions.  The Lint option files used are included in the
16278/acpi/generate/lint directory.
16279
16280Implemented enhanced status/error checking across the entire
16281Hardware manager subsystem.  Any hardware errors (reported from
16282the OSL) are now bubbled up and will abort a running control
16283method.
16284
16285
16286Fixed a problem where the per-ACPI-table integer width (32 or 64)
16287was stored only with control method nodes, causing a fault when
16288non-control method code was executed during table loading.  The
16289solution implemented uses a global variable to indicate table
16290width across the entire ACPI subsystem.  Therefore, ACPI CA does
16291not support mixed integer widths across different ACPI tables
16292(DSDT, SSDT).
16293
16294Fixed a problem where NULL extended fields (X fields) in an ACPI
162952.0 ACPI FADT caused the table load to fail.  Although the
16296existing ACPI specification is a bit fuzzy on this topic, the new
16297behavior is to fall back on a ACPI 1.0 field if the corresponding
16298ACPI 2.0 X field is zero (even though the table revision indicates
16299a full ACPI 2.0 table.)  The ACPI specification will be updated to
16300clarify this issue.
16301
16302Fixed a problem with the SystemMemory operation region handler
16303where memory was always accessed byte-wise even if the AML-
16304specified access width was larger than a byte.  This caused
16305problems on systems with memory-mapped I/O.  Memory is now
16306accessed with the width specified.  On systems that do not support
16307non-aligned transfers, a check is made to guarantee proper address
16308alignment before proceeding in order to avoid an AML-caused
16309alignment fault within the kernel.
16310
16311
16312Fixed a problem with the ExtendedIrq resource where only one byte
16313of the 4-byte Irq field was extracted.
16314
16315Fixed the AcpiExDigitsNeeded() procedure to support _UID.  This
16316function was out of date and required a rewrite.
16317
16318Code and Data Size: Current core subsystem library sizes are shown
16319below.  These are the code and data sizes for the acpica.lib
16320produced by the Microsoft Visual C++ 6.0 compiler, and these
16321values do not include any ACPI driver or OSPM code.  The debug
16322version of the code includes the debug output trace mechanism and
16323has a larger code and data size.  Note that these values will vary
16324depending on the efficiency of the compiler and the compiler
16325options used during generation.
16326
16327  Previous Release
16328    Non-Debug Version:  66.6K Code,   6.5K Data,   73.1K Total
16329    Debug Version:     139.8K Code,  57.4K Data,  197.2K Total
16330  Current Release:
16331    Non-Debug Version:  68.5K Code,   7.0K Data,   75.5K Total
16332    Debug Version:     142.4K Code,  58.3K Data,  200.7K Total
16333
16334
163352) Linux
16336
16337PCI IRQ routing fixes (Dominik Brodowski)
16338
16339
163403) iASL Compiler Version X2042:
16341
16342Implemented an additional compile-time error check for a field
16343unit whose size + minimum access width would cause a run-time
16344access beyond the end-of-region.  Previously, only the field size
16345itself was checked.
16346
16347The Core subsystem and iASL compiler now share a common parse
16348object in preparation for compile-time evaluation of the type
163493/4/5 ASL operators.
16350
16351
16352----------------------------------------
16353Summary of changes for this release: 03_29_02
16354
163551) ACPI CA Core Subsystem Version 20020329:
16356
16357Implemented support for late evaluation of TermArg operands to
16358Buffer and Package objects.  This allows complex expressions to be
16359used in the declarations of these object types.
16360
16361Fixed an ACPI 1.0 compatibility issue when reading Fields. In ACPI
163621.0, if the field was larger than 32 bits, it was returned as a
16363buffer - otherwise it was returned as an integer.  In ACPI 2.0,
16364the field is returned as a buffer only if the field is larger than
1636564 bits.  The TableRevision is now considered when making this
16366conversion to avoid incompatibility with existing ASL code.
16367
16368Implemented logical addressing for AcpiOsGetRootPointer.  This
16369allows an RSDP with either a logical or physical address.  With
16370this support, the host OS can now override all ACPI tables with
16371one logical RSDP.  Includes implementation of  "typed" pointer
16372support to allow a common data type for both physical and logical
16373pointers internally.  This required a change to the
16374AcpiOsGetRootPointer interface.
16375
16376Implemented the use of ACPI 2.0 Generic Address Structures for all
16377GPE, Fixed Event, and PM Timer I/O.  This allows the use of memory
16378mapped I/O for these ACPI features.
16379
16380Initialization now ignores not only non-required tables (All
16381tables other than the FADT, FACS, DSDT, and SSDTs), but also does
16382not validate the table headers of unrecognized tables.
16383
16384Fixed a problem where a notify handler could only be
16385installed/removed on an object of type Device.  All "notify"
16386
16387objects are now supported -- Devices, Processor, Power, and
16388Thermal.
16389
16390Removed most verbosity from the ACPI_DB_INFO debug level.  Only
16391critical information is returned when this debug level is enabled.
16392
16393Code and Data Size: Current core subsystem library sizes are shown
16394below.  These are the code and data sizes for the acpica.lib
16395produced by the Microsoft Visual C++ 6.0 compiler, and these
16396values do not include any ACPI driver or OSPM code.  The debug
16397version of the code includes the debug output trace mechanism and
16398has a larger code and data size.  Note that these values will vary
16399depending on the efficiency of the compiler and the compiler
16400options used during generation.
16401
16402  Previous Release
16403    Non-Debug Version:  65.4K Code,   6.2K Data,   71.6K Total
16404    Debug Version:     138.0K Code,  56.6K Data,  194.6K Total
16405  Current Release:
16406    Non-Debug Version:  66.6K Code,   6.5K Data,   73.1K Total
16407    Debug Version:     139.8K Code,  57.4K Data,  197.2K Total
16408
16409
164102) Linux:
16411
16412The processor driver (acpi_processor.c) now fully supports ACPI
164132.0-based processor performance control (e.g. Intel(R)
16414SpeedStep(TM) technology) Note that older laptops that only have
16415the Intel "applet" interface are not supported through this.  The
16416'limit' and 'performance' interface (/proc) are fully functional.
16417[Note that basic policy for controlling performance state
16418transitions will be included in the next version of ospmd.]  The
16419idle handler was modified to more aggressively use C2, and PIIX4
16420errata handling underwent a complete overhaul (big thanks to
16421Dominik Brodowski).
16422
16423Added support for ACPI-PCI device binding (acpi_pci_root.c). _ADR-
16424based devices in the ACPI namespace are now dynamically bound
16425(associated) with their PCI counterparts (e.g. PCI1->01:00.0).
16426This allows, among other things, ACPI to resolve bus numbers for
16427subordinate PCI bridges.
16428
16429Enhanced PCI IRQ routing to get the proper bus number for _PRT
16430entries defined underneath PCI bridges.
16431
16432Added IBM 600E to bad bios list due to invalid _ADR value for
16433PIIX4 PCI-ISA bridge, resulting in improper PCI IRQ routing.
16434
16435In the process of adding full MADT support (e.g. IOAPIC) for IA32
16436(acpi.c, mpparse.c) -- stay tuned.
16437
16438Added back visual differentiation between fixed-feature and
16439control-method buttons in dmesg.  Buttons are also subtyped (e.g.
16440button/power/PWRF) to simplify button identification.
16441
16442We no longer use -Wno-unused when compiling debug. Please ignore
16443any "_THIS_MODULE defined but not used" messages.
16444
16445Can now shut down the system using "magic sysrq" key.
16446
16447
164483) iASL Compiler version 2041:
16449
16450Fixed a problem where conversion errors for hex/octal/decimal
16451constants were not reported.
16452
16453Implemented a fix for the General Register template Address field.
16454This field was 8 bits when it should be 64.
16455
16456Fixed a problem where errors/warnings were no longer being emitted
16457within the listing output file.
16458
16459Implemented the ACPI 2.0A restriction on ACPI Table Signatures to
16460exactly 4 characters, alphanumeric only.
16461
16462
16463
16464
16465----------------------------------------
16466Summary of changes for this release: 03_08_02
16467
16468
164691) ACPI CA Core Subsystem Version 20020308:
16470
16471Fixed a problem with AML Fields where the use of the "AccessAny"
16472keyword could cause an interpreter error due to attempting to read
16473or write beyond the end of the parent Operation Region.
16474
16475Fixed a problem in the SystemMemory Operation Region handler where
16476an attempt was made to map memory beyond the end of the region.
16477This was the root cause of the "AE_ERROR" and "AE_NO_MEMORY"
16478errors on some Linux systems.
16479
16480Fixed a problem where the interpreter/namespace "search to root"
16481algorithm was not functioning for some object types.  Relaxed the
16482internal restriction on the search to allow upsearches for all
16483external object types as well as most internal types.
16484
16485
164862) Linux:
16487
16488We now use safe_halt() macro versus individual calls to sti | hlt.
16489
16490Writing to the processor limit interface should now work. "echo 1"
16491will increase the limit, 2 will decrease, and 0 will reset to the
16492
16493default.
16494
16495
164963) ASL compiler:
16497
16498Fixed segfault on Linux version.
16499
16500
16501----------------------------------------
16502Summary of changes for this release: 02_25_02
16503
165041) ACPI CA Core Subsystem:
16505
16506
16507Fixed a problem where the GPE bit masks were not initialized
16508properly, causing erratic GPE behavior.
16509
16510Implemented limited support for multiple calling conventions.  The
16511code can be generated with either the VPL (variable parameter
16512list, or "C") convention, or the FPL (fixed parameter list, or
16513"Pascal") convention.  The core subsystem is about 3.4% smaller
16514when generated with FPL.
16515
16516
165172) Linux
16518
16519Re-add some /proc/acpi/event functionality that was lost during
16520the rewrite
16521
16522Resolved issue with /proc events for fixed-feature buttons showing
16523up as the system device.
16524
16525Fixed checks on C2/C3 latencies to be inclusive of maximum values.
16526
16527Replaced AE_ERRORs in acpi_osl.c with more specific error codes.
16528
16529Changed ACPI PRT option from "pci=noacpi-routing" to "pci=noacpi"
16530
16531Fixed limit interface & usage to fix bugs with passive cooling
16532hysterisis.
16533
16534Restructured PRT support.
16535
16536
16537----------------------------------------
16538Summary of changes for this label: 02_14_02
16539
16540
165411) ACPI CA Core Subsystem:
16542
16543Implemented support in AcpiLoadTable to allow loading of FACS and
16544FADT tables.
16545
16546Support for the now-obsolete interim 0.71 64-bit ACPI tables has
16547been removed.  All 64-bit platforms should be migrated to the ACPI
165482.0 tables.  The actbl71.h header has been removed from the source
16549tree.
16550
16551All C macros defined within the subsystem have been prefixed with
16552"ACPI_" to avoid collision with other system include files.
16553
16554Removed the return value for the two AcpiOsPrint interfaces, since
16555it is never used and causes lint warnings for ignoring the return
16556value.
16557
16558Added error checking to all internal mutex acquire and release
16559calls.  Although a failure from one of these interfaces is
16560probably a fatal system error, these checks will cause the
16561immediate abort of the currently executing method or interface.
16562
16563Fixed a problem where the AcpiSetCurrentResources interface could
16564fault.  This was a side effect of the deployment of the new memory
16565allocation model.
16566
16567Fixed a couple of problems with the Global Lock support introduced
16568in the last major build.  The "common" (1.0/2.0) internal FACS was
16569being overwritten with the FACS signature and clobbering the
16570Global Lock pointer.  Also, the actual firmware FACS was being
16571unmapped after construction of the "common" FACS, preventing
16572access to the actual Global Lock field within it.  The "common"
16573internal FACS is no longer installed as an actual ACPI table; it
16574is used simply as a global.
16575
16576Code and Data Size: Current core subsystem library sizes are shown
16577below.  These are the code and data sizes for the acpica.lib
16578produced by the Microsoft Visual C++ 6.0 compiler, and these
16579values do not include any ACPI driver or OSPM code.  The debug
16580version of the code includes the debug output trace mechanism and
16581has a larger code and data size.  Note that these values will vary
16582depending on the efficiency of the compiler and the compiler
16583options used during generation.
16584
16585  Previous Release (02_07_01)
16586    Non-Debug Version:  65.2K Code,   6.2K Data,   71.4K Total
16587    Debug Version:     136.9K Code,  56.4K Data,  193.3K Total
16588  Current Release:
16589    Non-Debug Version:  65.4K Code,   6.2K Data,   71.6K Total
16590    Debug Version:     138.0K Code,  56.6K Data,  194.6K Total
16591
16592
165932) Linux
16594
16595Updated Linux-specific code for core macro and OSL interface
16596changes described above.
16597
16598Improved /proc/acpi/event. It now can be opened only once and has
16599proper poll functionality.
16600
16601Fixed and restructured power management (acpi_bus).
16602
16603Only create /proc "view by type" when devices of that class exist.
16604
16605Fixed "charging/discharging" bug (and others) in acpi_battery.
16606
16607Improved thermal zone code.
16608
16609
166103) ASL Compiler, version X2039:
16611
16612
16613Implemented the new compiler restriction on ASL String hex/octal
16614escapes to non-null, ASCII values.  An error results if an invalid
16615value is used.  (This will require an ACPI 2.0 specification
16616change.)
16617
16618AML object labels that are output to the optional C and ASM source
16619are now prefixed with both the ACPI table signature and table ID
16620to help guarantee uniqueness within a large BIOS project.
16621
16622
16623----------------------------------------
16624Summary of changes for this label: 02_01_02
16625
166261) ACPI CA Core Subsystem:
16627
16628ACPI 2.0 support is complete in the entire Core Subsystem and the
16629ASL compiler. All new ACPI 2.0 operators are implemented and all
16630other changes for ACPI 2.0 support are complete.  With
16631simultaneous code and data optimizations throughout the subsystem,
16632ACPI 2.0 support has been implemented with almost no additional
16633cost in terms of code and data size.
16634
16635Implemented a new mechanism for allocation of return buffers.  If
16636the buffer length is set to ACPI_ALLOCATE_BUFFER, the buffer will
16637be allocated on behalf of the caller.  Consolidated all return
16638buffer validation and allocation to a common procedure.  Return
16639buffers will be allocated via the primary OSL allocation interface
16640since it appears that a separate pool is not needed by most users.
16641If a separate pool is required for these buffers, the caller can
16642still use the original mechanism and pre-allocate the buffer(s).
16643
16644Implemented support for string operands within the DerefOf
16645operator.
16646
16647Restructured the Hardware and Event managers to be table driven,
16648simplifying the source code and reducing the amount of generated
16649code.
16650
16651Split the common read/write low-level ACPI register bitfield
16652procedure into a separate read and write, simplifying the code
16653considerably.
16654
16655Obsoleted the AcpiOsCallocate OSL interface.  This interface was
16656used only a handful of times and didn't have enough critical mass
16657for a separate interface.  Replaced with a common calloc procedure
16658in the core.
16659
16660Fixed a reported problem with the GPE number mapping mechanism
16661that allows GPE1 numbers to be non-contiguous with GPE0.
16662Reorganized the GPE information and shrunk a large array that was
16663originally large enough to hold info for all possible GPEs (256)
16664to simply large enough to hold all GPEs up to the largest GPE
16665number on the machine.
16666
16667Fixed a reported problem with resource structure alignment on 64-
16668bit platforms.
16669
16670Changed the AcpiEnableEvent and AcpiDisableEvent external
16671interfaces to not require any flags for the common case of
16672enabling/disabling a GPE.
16673
16674Implemented support to allow a "Notify" on a Processor object.
16675
16676Most TBDs in comments within the source code have been resolved
16677and eliminated.
16678
16679
16680Fixed a problem in the interpreter where a standalone parent
16681prefix (^) was not handled correctly in the interpreter and
16682debugger.
16683
16684Removed obsolete and unnecessary GPE save/restore code.
16685
16686Implemented Field support in the ASL Load operator.  This allows a
16687table to be loaded from a named field, in addition to loading a
16688table directly from an Operation Region.
16689
16690Implemented timeout and handle support in the external Global Lock
16691interfaces.
16692
16693Fixed a problem in the AcpiDump utility where pathnames were no
16694longer being generated correctly during the dump of named objects.
16695
16696Modified the AML debugger to give a full display of if/while
16697predicates instead of just one AML opcode at a time.  (The
16698predicate can have several nested ASL statements.)  The old method
16699was confusing during single stepping.
16700
16701Code and Data Size: Current core subsystem library sizes are shown
16702below. These are the code and data sizes for the acpica.lib
16703produced by the Microsoft Visual C++ 6.0 compiler, and these
16704values do not include any ACPI driver or OSPM code.  The debug
16705version of the code includes the debug output trace mechanism and
16706has a larger code and data size.  Note that these values will vary
16707depending on the efficiency of the compiler and the compiler
16708options used during generation.
16709
16710  Previous Release (12_18_01)
16711     Non-Debug Version:  66.1K Code,   5.5K Data,   71.6K Total
16712     Debug Version:     138.3K Code,  55.9K Data,  194.2K Total
16713   Current Release:
16714     Non-Debug Version:  65.2K Code,   6.2K Data,   71.4K Total
16715     Debug Version:     136.9K Code,  56.4K Data,  193.3K Total
16716
167172) Linux
16718
16719 Implemented fix for PIIX reverse throttling errata (Processor
16720driver)
16721
16722Added new Limit interface (Processor and Thermal drivers)
16723
16724New thermal policy (Thermal driver)
16725
16726Many updates to /proc
16727
16728Battery "low" event support (Battery driver)
16729
16730Supports ACPI PCI IRQ routing (PCI Link and PCI root drivers)
16731
16732IA32 - IA64 initialization unification, no longer experimental
16733
16734Menuconfig options redesigned
16735
167363) ASL Compiler, version X2037:
16737
16738Implemented several new output features to simplify integration of
16739AML code into  firmware: 1) Output the AML in C source code with
16740labels for each named ASL object.  The    original ASL source code
16741is interleaved as C comments. 2) Output the AML in ASM source code
16742with labels and interleaved ASL    source. 3) Output the AML in
16743raw hex table form, in either C or ASM.
16744
16745Implemented support for optional string parameters to the
16746LoadTable operator.
16747
16748Completed support for embedded escape sequences within string
16749literals.  The compiler now supports all single character escapes
16750as well as the Octal and Hex escapes.  Note: the insertion of a
16751null byte into a string literal (via the hex/octal escape) causes
16752the string to be immediately terminated.  A warning is issued.
16753
16754Fixed a problem where incorrect AML was generated for the case
16755where an ASL namepath consists of a single parent prefix (
16756
16757) with no trailing name segments.
16758
16759The compiler has been successfully generated with a 64-bit C
16760compiler.
16761
16762
16763
16764
16765----------------------------------------
16766Summary of changes for this label: 12_18_01
16767
167681) Linux
16769
16770Enhanced blacklist with reason and severity fields. Any table's
16771signature may now be used to identify a blacklisted system.
16772
16773Call _PIC control method to inform the firmware which interrupt
16774model the OS is using. Turn on any disabled link devices.
16775
16776Cleaned up busmgr /proc error handling (Andreas Dilger)
16777
16778 2) ACPI CA Core Subsystem:
16779
16780Implemented ACPI 2.0 semantics for the "Break" operator (Exit from
16781while loop)
16782
16783Completed implementation of the ACPI 2.0 "Continue",
16784"ConcatenateResTemplate", "DataTableRegion", and "LoadTable"
16785operators.  All new ACPI 2.0 operators are now implemented in both
16786the ASL compiler and the AML interpreter.  The only remaining ACPI
167872.0 task is support for the String data type in the DerefOf
16788operator.  Fixed a problem with AcquireMutex where the status code
16789was lost if the caller had to actually wait for the mutex.
16790
16791Increased the maximum ASL Field size from 64K bits to 4G bits.
16792
16793Completed implementation of the external Global Lock interfaces --
16794AcpiAcquireGlobalLock and AcpiReleaseGlobalLock.  The Timeout and
16795Handler parameters were added.
16796
16797Completed another pass at removing warnings and issues when
16798compiling with 64-bit compilers.  The code now compiles cleanly
16799with the Intel 64-bit C/C++ compiler.  Most notably, the pointer
16800add and subtract (diff) macros have changed considerably.
16801
16802
16803Created and deployed a new ACPI_SIZE type that is 64-bits wide on
1680464-bit platforms, 32-bits on all others.  This type is used
16805wherever memory allocation and/or the C sizeof() operator is used,
16806and affects the OSL memory allocation interfaces AcpiOsAllocate
16807and AcpiOsCallocate.
16808
16809Implemented sticky user breakpoints in the AML debugger.
16810
16811Code and Data Size: Current core subsystem library sizes are shown
16812below. These are the code and data sizes for the acpica.lib
16813produced by the Microsoft Visual C++ 6.0 compiler, and these
16814values do not include any ACPI driver or OSPM code.  The debug
16815version of the code includes the debug output trace mechanism and
16816has a larger code and data size. Note that these values will vary
16817depending on the efficiency of the compiler and the compiler
16818options used during generation.
16819
16820  Previous Release (12_05_01)
16821     Non-Debug Version:  64.7K Code,   5.3K Data,   70.0K Total
16822     Debug Version:     136.2K Code,  55.6K Data,  191.8K Total
16823   Current Release:
16824     Non-Debug Version:  66.1K Code,   5.5K Data,   71.6K Total
16825     Debug Version:     138.3K Code,  55.9K Data,  194.2K Total
16826
16827 3) ASL Compiler, version X2034:
16828
16829Now checks for (and generates an error if detected) the use of a
16830Break or Continue statement without an enclosing While statement.
16831
16832
16833Successfully generated the compiler with the Intel 64-bit C
16834compiler.
16835
16836 ----------------------------------------
16837Summary of changes for this label: 12_05_01
16838
16839 1) ACPI CA Core Subsystem:
16840
16841The ACPI 2.0 CopyObject operator is fully implemented.  This
16842operator creates a new copy of an object (and is also used to
16843bypass the "implicit conversion" mechanism of the Store operator.)
16844
16845The ACPI 2.0 semantics for the SizeOf operator are fully
16846implemented.  The change is that performing a SizeOf on a
16847reference object causes an automatic dereference of the object to
16848tha actual value before the size is evaluated. This behavior was
16849undefined in ACPI 1.0.
16850
16851The ACPI 2.0 semantics for the Extended IRQ resource descriptor
16852have been implemented.  The interrupt polarity and mode are now
16853independently set.
16854
16855Fixed a problem where ASL Constants (Zero, One, Ones, Revision)
16856appearing in Package objects were not properly converted to
16857integers when the internal Package was converted to an external
16858object (via the AcpiEvaluateObject interface.)
16859
16860Fixed a problem with the namespace object deletion mechanism for
16861objects created by control methods.  There were two parts to this
16862problem: 1) Objects created during the initialization phase method
16863parse were not being deleted, and 2) The object owner ID mechanism
16864to track objects was broken.
16865
16866Fixed a problem where the use of the ASL Scope operator within a
16867control method would result in an invalid opcode exception.
16868
16869Fixed a problem introduced in the previous label where the buffer
16870length required for the _PRT structure was not being returned
16871correctly.
16872
16873Code and Data Size: Current core subsystem library sizes are shown
16874below. These are the code and data sizes for the acpica.lib
16875produced by the Microsoft Visual C++ 6.0 compiler, and these
16876values do not include any ACPI driver or OSPM code.  The debug
16877version of the code includes the debug output trace mechanism and
16878has a larger code and data size.  Note that these values will vary
16879depending on the efficiency of the compiler and the compiler
16880options used during generation.
16881
16882  Previous Release (11_20_01)
16883     Non-Debug Version:  64.1K Code,   5.3K Data,   69.4K Total
16884     Debug Version:     135.1K Code,  55.4K Data,  190.5K Total
16885
16886  Current Release:
16887     Non-Debug Version:  64.7K Code,   5.3K Data,   70.0K Total
16888     Debug Version:     136.2K Code,  55.6K Data,  191.8K Total
16889
16890 2) Linux:
16891
16892Updated all files to apply cleanly against 2.4.16.
16893
16894Added basic PCI Interrupt Routing Table (PRT) support for IA32
16895(acpi_pci.c), and unified the PRT code for IA32 and IA64.  This
16896version supports both static and dynamic PRT entries, but dynamic
16897entries are treated as if they were static (not yet
16898reconfigurable).  Architecture- specific code to use this data is
16899absent on IA32 but should be available shortly.
16900
16901Changed the initialization sequence to start the ACPI interpreter
16902(acpi_init) prior to initialization of the PCI driver (pci_init)
16903in init/main.c.  This ordering is required to support PRT and
16904facilitate other (future) enhancement.  A side effect is that the
16905ACPI bus driver and certain device drivers can no longer be loaded
16906as modules.
16907
16908Modified the 'make menuconfig' options to allow PCI Interrupt
16909Routing support to be included without the ACPI Bus and other
16910device drivers.
16911
16912 3) ASL Compiler, version X2033:
16913
16914Fixed some issues with the use of the new CopyObject and
16915DataTableRegion operators.  Both are fully functional.
16916
16917 ----------------------------------------
16918Summary of changes for this label: 11_20_01
16919
16920 20 November 2001.  Summary of changes for this release.
16921
16922 1) ACPI CA Core Subsystem:
16923
16924Updated Index support to match ACPI 2.0 semantics.  Storing a
16925Integer, String, or Buffer to an Index of a Buffer will store only
16926the least-significant byte of the source to the Indexed buffer
16927byte.  Multiple writes are not performed.
16928
16929Fixed a problem where the access type used in an AccessAs ASL
16930operator was not recorded correctly into the field object.
16931
16932Fixed a problem where ASL Event objects were created in a
16933signalled state. Events are now created in an unsignalled state.
16934
16935The internal object cache is now purged after table loading and
16936initialization to reduce the use of dynamic kernel memory -- on
16937the assumption that object use is greatest during the parse phase
16938of the entire table (versus the run-time use of individual control
16939methods.)
16940
16941ACPI 2.0 variable-length packages are now fully operational.
16942
16943Code and Data Size: Code and Data optimizations have permitted new
16944feature development with an actual reduction in the library size.
16945Current core subsystem library sizes are shown below.  These are
16946the code and data sizes for the acpica.lib produced by the
16947Microsoft Visual C++ 6.0 compiler, and these values do not include
16948any ACPI driver or OSPM code.  The debug version of the code
16949includes the debug output trace mechanism and has a larger code
16950and data size.  Note that these values will vary depending on the
16951efficiency of the compiler and the compiler options used during
16952generation.
16953
16954  Previous Release (11_09_01):
16955     Non-Debug Version:  63.7K Code,   5.2K Data,   68.9K Total
16956     Debug Version:     134.5K Code,  55.4K Data,  189.9K Total
16957
16958  Current Release:
16959     Non-Debug Version:  64.1K Code,   5.3K Data,   69.4K Total
16960     Debug Version:     135.1K Code,  55.4K Data,  190.5K Total
16961
16962 2) Linux:
16963
16964Enhanced the ACPI boot-time initialization code to allow the use
16965of Local APIC tables for processor enumeration on IA-32, and to
16966pave the way for a fully MPS-free boot (on SMP systems) in the
16967near future.  This functionality replaces
16968arch/i386/kernel/acpitables.c, which was introduced in an earlier
169692.4.15-preX release.  To enable this feature you must add
16970"acpi_boot=on" to the kernel command line -- see the help entry
16971for CONFIG_ACPI_BOOT for more information.  An IA-64 release is in
16972the works...
16973
16974Restructured the configuration options to allow boot-time table
16975parsing support without inclusion of the ACPI Interpreter (and
16976other) code.
16977
16978NOTE: This release does not include fixes for the reported events,
16979power-down, and thermal passive cooling issues (coming soon).
16980
16981 3) ASL Compiler:
16982
16983Added additional typechecking for Fields within restricted access
16984Operation Regions.  All fields within EC and CMOS regions must be
16985declared with ByteAcc. All fields within SMBus regions must be
16986declared with the BufferAcc access type.
16987
16988Fixed a problem where the listing file output of control methods
16989no longer interleaved the actual AML code with the ASL source
16990code.
16991
16992
16993
16994
16995----------------------------------------
16996Summary of changes for this label: 11_09_01
16997
169981) ACPI CA Core Subsystem:
16999
17000Implemented ACPI 2.0-defined support for writes to fields with a
17001Buffer, String, or Integer source operand that is smaller than the
17002target field. In these cases, the source operand is zero-extended
17003to fill the target field.
17004
17005Fixed a problem where a Field starting bit offset (within the
17006parent operation region) was calculated incorrectly if the
17007
17008alignment of the field differed from the access width.  This
17009affected CreateWordField, CreateDwordField, CreateQwordField, and
17010possibly other fields that use the "AccessAny" keyword.
17011
17012Fixed a problem introduced in the 11_02_01 release where indirect
17013stores through method arguments did not operate correctly.
17014
170152) Linux:
17016
17017Implemented boot-time ACPI table parsing support
17018(CONFIG_ACPI_BOOT) for IA32 and IA64 UP/SMP systems.  This code
17019facilitates the use of ACPI tables (e.g. MADT, SRAT) rather than
17020legacy BIOS interfaces (e.g. MPS) for the configuration of system
17021processors, memory, and interrupts during setup_arch().  Note that
17022this patch does not include the required architecture-specific
17023changes required to apply this information -- subsequent patches
17024will be posted for both IA32 and IA64 to achieve this.
17025
17026Added low-level sleep support for IA32 platforms, courtesy of Pat
17027Mochel. This allows IA32 systems to transition to/from various
17028sleeping states (e.g. S1, S3), although the lack of a centralized
17029driver model and power-manageable drivers will prevent its
17030(successful) use on most systems.
17031
17032Revamped the ACPI 'menuconfig' layout: created new "ACPI Support"
17033submenu, unified IA32 and IA64 options, added new "Boot using ACPI
17034tables" option, etc.
17035
17036Increased the default timeout for the EC driver from 1ms to 10ms
17037(1000 cycles of 10us) to try to address AE_TIME errors during EC
17038transactions.
17039
17040 ----------------------------------------
17041Summary of changes for this label: 11_02_01
17042
170431) ACPI CA Core Subsystem:
17044
17045ACPI 2.0 Support: Implemented ACPI 2.0 64-bit Field access
17046(QWordAcc keyword). All ACPI 2.0 64-bit support is now
17047implemented.
17048
17049OSL Interfaces: Several of the OSL (AcpiOs*) interfaces required
17050changes to support ACPI 2.0 Qword field access.  Read/Write
17051PciConfiguration(), Read/Write Memory(), and Read/Write Port() now
17052accept an ACPI_INTEGER (64 bits) as the value parameter.  Also,
17053the value parameter for the address space handler interface is now
17054an ACPI_INTEGER.  OSL implementations of these interfaces must now
17055handle the case where the Width parameter is 64.
17056
17057Index Fields: Fixed a problem where unaligned bit assembly and
17058disassembly for IndexFields was not supported correctly.
17059
17060Index and Bank Fields:  Nested Index and Bank Fields are now
17061supported. During field access, a check is performed to ensure
17062that the value written to an Index or Bank register is not out of
17063the range of the register.  The Index (or Bank) register is
17064written before each access to the field data. Future support will
17065include allowing individual IndexFields to be wider than the
17066DataRegister width.
17067
17068Fields: Fixed a problem where the AML interpreter was incorrectly
17069attempting to write beyond the end of a Field/OpRegion.  This was
17070a boundary case that occurred when a DWORD field was written to a
17071BYTE access OpRegion, forcing multiple writes and causing the
17072interpreter to write one datum too many.
17073
17074Fields: Fixed a problem with Field/OpRegion access where the
17075starting bit address of a field was incorrectly calculated if the
17076current access type was wider than a byte (WordAcc, DwordAcc, or
17077QwordAcc).
17078
17079Fields: Fixed a problem where forward references to individual
17080FieldUnits (individual Field names within a Field definition) were
17081not resolved during the AML table load.
17082
17083Fields: Fixed a problem where forward references from a Field
17084definition to the parent Operation Region definition were not
17085resolved during the AML table load.
17086
17087Fields: Duplicate FieldUnit names within a scope are now detected
17088during AML table load.
17089
17090Acpi Interfaces: Fixed a problem where the AcpiGetName() interface
17091returned an incorrect name for the root node.
17092
17093Code and Data Size: Code and Data optimizations have permitted new
17094feature development with an actual reduction in the library size.
17095Current core subsystem library sizes are shown below.  These are
17096the code and data sizes for the acpica.lib produced by the
17097Microsoft Visual C++ 6.0 compiler, and these values do not include
17098any ACPI driver or OSPM code.  The debug version of the code
17099includes the debug output trace mechanism and has a larger code
17100and data size.  Note that these values will vary depending on the
17101efficiency of the compiler and the compiler options used during
17102generation.
17103
17104  Previous Release (10_18_01):
17105     Non-Debug Version:  63.9K Code,   5.1K Data,   69.0K Total
17106     Debug Version:     136.7K Code,  57.4K Data,  194.2K Total
17107
17108  Current Release:
17109     Non-Debug Version:  63.7K Code,   5.2K Data,   68.9K Total
17110     Debug Version:     134.5K Code,  55.4K Data,  189.9K Total
17111
17112 2) Linux:
17113
17114Improved /proc processor output (Pavel Machek) Re-added
17115MODULE_LICENSE("GPL") to all modules.
17116
17117 3) ASL Compiler version X2030:
17118
17119Duplicate FieldUnit names within a scope are now detected and
17120flagged as errors.
17121
17122 4) Documentation:
17123
17124Programmer Reference updated to reflect OSL and address space
17125handler interface changes described above.
17126
17127----------------------------------------
17128Summary of changes for this label: 10_18_01
17129
17130ACPI CA Core Subsystem:
17131
17132Fixed a problem with the internal object reference count mechanism
17133that occasionally caused premature object deletion. This resolves
17134all of the outstanding problem reports where an object is deleted
17135in the middle of an interpreter evaluation.  Although this problem
17136only showed up in rather obscure cases, the solution to the
17137problem involved an adjustment of all reference counts involving
17138objects attached to namespace nodes.
17139
17140Fixed a problem with Field support in the interpreter where
17141writing to an aligned field whose length is an exact multiple (2
17142or greater) of the field access granularity would cause an attempt
17143to write beyond the end of the field.
17144
17145The top level AML opcode execution functions within the
17146interpreter have been renamed with a more meaningful and
17147consistent naming convention.  The modules exmonad.c and
17148exdyadic.c were eliminated.  New modules are exoparg1.c,
17149exoparg2.c, exoparg3.c, and exoparg6.c.
17150
17151Support for the ACPI 2.0 "Mid" ASL operator has been implemented.
17152
17153Fixed a problem where the AML debugger was causing some internal
17154objects to not be deleted during subsystem termination.
17155
17156Fixed a problem with the external AcpiEvaluateObject interface
17157where the subsystem would fault if the named object to be
17158evaluated referred to a constant such as Zero, Ones, etc.
17159
17160Fixed a problem with IndexFields and BankFields where the
17161subsystem would fault if the index, data, or bank registers were
17162not defined in the same scope as the field itself.
17163
17164Added printf format string checking for compilers that support
17165this feature.  Corrected more than 50 instances of issues with
17166format specifiers within invocations of ACPI_DEBUG_PRINT
17167throughout the core subsystem code.
17168
17169The ASL "Revision" operator now returns the ACPI support level
17170implemented in the core - the value "2" since the ACPI 2.0 support
17171is more than 50% implemented.
17172
17173Enhanced the output of the AML debugger "dump namespace" command
17174to output in a more human-readable form.
17175
17176Current core subsystem library code sizes are shown below.  These
17177
17178are the code and data sizes for the acpica.lib produced by the
17179Microsoft Visual C++ 6.0 compiler, and these values do not include
17180any ACPI driver or OSPM code.  The debug version of the code
17181includes the full debug trace mechanism -- leading to a much
17182
17183larger code and data size.  Note that these values will vary
17184depending on the efficiency of the compiler and the compiler
17185options used during generation.
17186
17187     Previous Label (09_20_01):
17188     Non-Debug Version:    65K Code,     5K Data,     70K Total
17189     Debug Version:       138K Code,    58K Data,    196K Total
17190
17191     This Label:
17192
17193     Non-Debug Version:  63.9K Code,   5.1K Data,   69.0K Total
17194     Debug Version:     136.7K Code,  57.4K Data,  194.2K Total
17195
17196Linux:
17197
17198Implemented a "Bad BIOS Blacklist" to track machines that have
17199known ASL/AML problems.
17200
17201Enhanced the /proc interface for the thermal zone driver and added
17202support for _HOT (the critical suspend trip point).  The 'info'
17203file now includes threshold/policy information, and allows setting
17204of _SCP (cooling preference) and _TZP (polling frequency) values
17205to the 'info' file. Examples: "echo tzp=5 > info" sets the polling
17206frequency to 5 seconds, and "echo scp=1 > info" sets the cooling
17207preference to the passive/quiet mode (if supported by the ASL).
17208
17209Implemented a workaround for a gcc bug that resuted in an OOPs
17210when loading the control method battery driver.
17211
17212 ----------------------------------------
17213Summary of changes for this label: 09_20_01
17214
17215 ACPI CA Core Subsystem:
17216
17217The AcpiEnableEvent and AcpiDisableEvent interfaces have been
17218modified to allow individual GPE levels to be flagged as wake-
17219enabled (i.e., these GPEs are to remain enabled when the platform
17220sleeps.)
17221
17222The AcpiEnterSleepState and AcpiLeaveSleepState interfaces now
17223support wake-enabled GPEs.  This means that upon entering the
17224sleep state, all GPEs that are not wake-enabled are disabled.
17225When leaving the sleep state, these GPEs are re-enabled.
17226
17227A local double-precision divide/modulo module has been added to
17228enhance portability to OS kernels where a 64-bit math library is
17229not available.  The new module is "utmath.c".
17230
17231Several optimizations have been made to reduce the use of CPU
17232stack.  Originally over 2K, the maximum stack usage is now below
172332K at 1860  bytes (1.82k)
17234
17235Fixed a problem with the AcpiGetFirmwareTable interface where the
17236root table pointer was not mapped into a logical address properly.
17237
17238Fixed a problem where a NULL pointer was being dereferenced in the
17239interpreter code for the ASL Notify operator.
17240
17241Fixed a problem where the use of the ASL Revision operator
17242returned an error. This operator now returns the current version
17243of the ACPI CA core subsystem.
17244
17245Fixed a problem where objects passed as control method parameters
17246to AcpiEvaluateObject were always deleted at method termination.
17247However, these objects may end up being stored into the namespace
17248by the called method.  The object reference count mechanism was
17249applied to these objects instead of a force delete.
17250
17251Fixed a problem where static strings or buffers (contained in the
17252AML code) that are declared as package elements within the ASL
17253code could cause a fault because the interpreter would attempt to
17254delete them.  These objects are now marked with the "static
17255object" flag to prevent any attempt to delete them.
17256
17257Implemented an interpreter optimization to use operands directly
17258from the state object instead of extracting the operands to local
17259variables.  This reduces stack use and code size, and improves
17260performance.
17261
17262The module exxface.c was eliminated as it was an unnecessary extra
17263layer of code.
17264
17265Current core subsystem library code sizes are shown below.  These
17266are the code and data sizes for the acpica.lib produced by the
17267Microsoft Visual C++ 6.0 compiler, and these values do not include
17268any ACPI driver or OSPM code.  The debug version of the code
17269includes the full debug trace mechanism -- leading to a much
17270larger code and data size.  Note that these values will vary
17271depending on the efficiency of the compiler and the compiler
17272options used during generation.
17273
17274  Non-Debug Version:  65K Code,   5K Data,   70K Total
17275(Previously 69K)   Debug Version:     138K Code,  58K Data,  196K
17276Total  (Previously 195K)
17277
17278Linux:
17279
17280Support for ACPI 2.0 64-bit integers has been added.   All ACPI
17281Integer objects are now 64 bits wide
17282
17283All Acpi data types and structures are now in lower case.  Only
17284Acpi macros are upper case for differentiation.
17285
17286 Documentation:
17287
17288Changes to the external interfaces as described above.
17289
17290 ----------------------------------------
17291Summary of changes for this label: 08_31_01
17292
17293 ACPI CA Core Subsystem:
17294
17295A bug with interpreter implementation of the ASL Divide operator
17296was found and fixed.  The implicit function return value (not the
17297explicit store operands) was returning the remainder instead of
17298the quotient.  This was a longstanding bug and it fixes several
17299known outstanding issues on various platforms.
17300
17301The ACPI_DEBUG_PRINT and function trace entry/exit macros have
17302been further optimized for size.  There are 700 invocations of the
17303DEBUG_PRINT macro alone, so each optimization reduces the size of
17304the debug version of the subsystem significantly.
17305
17306A stack trace mechanism has been implemented.  The maximum stack
17307usage is about 2K on 32-bit platforms.  The debugger command "stat
17308stack" will display the current maximum stack usage.
17309
17310All public symbols and global variables within the subsystem are
17311now prefixed with the string "Acpi".  This keeps all of the
17312symbols grouped together in a kernel map, and avoids conflicts
17313with other kernel subsystems.
17314
17315Most of the internal fixed lookup tables have been moved into the
17316code segment via the const operator.
17317
17318Several enhancements have been made to the interpreter to both
17319reduce the code size and improve performance.
17320
17321Current core subsystem library code sizes are shown below.  These
17322are the code and data sizes for the acpica.lib produced by the
17323Microsoft Visual C++ 6.0 compiler, and these values do not include
17324any ACPI driver or OSPM code.  The debug version of the code
17325includes the full debug trace mechanism which contains over 700
17326invocations of the DEBUG_PRINT macro, 500 function entry macro
17327invocations, and over 900 function exit macro invocations --
17328leading to a much larger code and data size.  Note that these
17329values will vary depending on the efficiency of the compiler and
17330the compiler options used during generation.
17331
17332        Non-Debug Version:  64K Code,   5K Data,   69K Total
17333Debug Version:     137K Code,  58K Data,  195K Total
17334
17335 Linux:
17336
17337Implemented wbinvd() macro, pending a kernel-wide definition.
17338
17339Fixed /proc/acpi/event to handle poll() and short reads.
17340
17341 ASL Compiler, version X2026:
17342
17343Fixed a problem introduced in the previous label where the AML
17344
17345code emitted for package objects produced packages with zero
17346length.
17347
17348 ----------------------------------------
17349Summary of changes for this label: 08_16_01
17350
17351ACPI CA Core Subsystem:
17352
17353The following ACPI 2.0 ASL operators have been implemented in the
17354AML interpreter (These are already supported by the Intel ASL
17355compiler):  ToDecimalString, ToHexString, ToString, ToInteger, and
17356ToBuffer.  Support for 64-bit AML constants is implemented in the
17357AML parser, debugger, and disassembler.
17358
17359The internal memory tracking mechanism (leak detection code) has
17360been upgraded to reduce the memory overhead (a separate tracking
17361block is no longer allocated for each memory allocation), and now
17362supports all of the internal object caches.
17363
17364The data structures and code for the internal object caches have
17365been coelesced and optimized so that there is a single cache and
17366memory list data structure and a single group of functions that
17367implement generic cache management.  This has reduced the code
17368size in both the debug and release versions of the subsystem.
17369
17370The DEBUG_PRINT macro(s) have been optimized for size and replaced
17371by ACPI_DEBUG_PRINT.  The syntax for this macro is slightly
17372different, because it generates a single call to an internal
17373function.  This results in a savings of about 90 bytes per
17374invocation, resulting in an overall code and data savings of about
1737516% in the debug version of the subsystem.
17376
17377 Linux:
17378
17379Fixed C3 disk corruption problems and re-enabled C3 on supporting
17380machines.
17381
17382Integrated low-level sleep code by Patrick Mochel.
17383
17384Further tweaked source code Linuxization.
17385
17386Other minor fixes.
17387
17388 ASL Compiler:
17389
17390Support for ACPI 2.0 variable length packages is fixed/completed.
17391
17392Fixed a problem where the optional length parameter for the ACPI
173932.0 ToString operator.
17394
17395Fixed multiple extraneous error messages when a syntax error is
17396detected within the declaration line of a control method.
17397
17398 ----------------------------------------
17399Summary of changes for this label: 07_17_01
17400
17401ACPI CA Core Subsystem:
17402
17403Added a new interface named AcpiGetFirmwareTable to obtain any
17404ACPI table via the ACPI signature.  The interface can be called at
17405any time during kernel initialization, even before the kernel
17406virtual memory manager is initialized and paging is enabled.  This
17407allows kernel subsystems to obtain ACPI tables very early, even
17408before the ACPI CA subsystem is initialized.
17409
17410Fixed a problem where Fields defined with the AnyAcc attribute
17411could be resolved to the incorrect address under the following
17412conditions: 1) the field width is larger than 8 bits and 2) the
17413parent operation region is not defined on a DWORD boundary.
17414
17415Fixed a problem where the interpreter is not being locked during
17416namespace initialization (during execution of the _INI control
17417methods), causing an error when an attempt is made to release it
17418later.
17419
17420ACPI 2.0 support in the AML Interpreter has begun and will be
17421ongoing throughout the rest of this year.  In this label, The Mod
17422operator is implemented.
17423
17424Added a new data type to contain full PCI addresses named
17425ACPI_PCI_ID. This structure contains the PCI Segment, Bus, Device,
17426and Function values.
17427
17428 Linux:
17429
17430Enhanced the Linux version of the source code to change most
17431capitalized ACPI type names to lowercase. For example, all
17432instances of ACPI_STATUS are changed to acpi_status.  This will
17433result in a large diff, but the change is strictly cosmetic and
17434aligns the CA code closer to the Linux coding standard.
17435
17436OSL Interfaces:
17437
17438The interfaces to the PCI configuration space have been changed to
17439add the PCI Segment number and to split the single 32-bit combined
17440DeviceFunction field into two 16-bit fields.  This was
17441accomplished by moving the four values that define an address in
17442PCI configuration space (segment, bus, device, and function) to
17443the new ACPI_PCI_ID structure.
17444
17445The changes to the PCI configuration space interfaces led to a
17446reexamination of the complete set of address space access
17447interfaces for PCI, I/O, and Memory.  The previously existing 18
17448interfaces have proven difficult to maintain (any small change
17449must be propagated across at least 6 interfaces) and do not easily
17450allow for future expansion to 64 bits if necessary.  Also, on some
17451systems, it would not be appropriate to demultiplex the access
17452width (8, 16, 32,or 64) before calling the OSL if the
17453corresponding native OS interfaces contain a similar access width
17454parameter.  For these reasons, the 18 address space interfaces
17455have been replaced by these 6 new ones:
17456
17457AcpiOsReadPciConfiguration
17458AcpiOsWritePciConfiguration
17459AcpiOsReadMemory
17460AcpiOsWriteMemory
17461AcpiOsReadPort
17462AcpiOsWritePort
17463
17464Added a new interface named AcpiOsGetRootPointer to allow the OSL
17465to perform the platform and/or OS-specific actions necessary to
17466obtain the ACPI RSDP table pointer.  On IA-32 platforms, this
17467interface will simply call down to the CA core to perform the low-
17468memory search for the table.  On IA-64, the RSDP is obtained from
17469EFI.  Migrating this interface to the OSL allows the CA core to
17470
17471remain OS and platform independent.
17472
17473Added a new interface named AcpiOsSignal to provide a generic
17474"function code and pointer" interface for various miscellaneous
17475signals and notifications that must be made to the host OS.   The
17476first such signals are intended to support the ASL Fatal and
17477Breakpoint operators.  In the latter case, the AcpiOsBreakpoint
17478interface has been obsoleted.
17479
17480The definition of the AcpiFormatException interface has been
17481changed to simplify its use.  The caller no longer must supply a
17482buffer to the call; A pointer to a const string is now returned
17483directly.  This allows the call to be easily used in printf
17484statements, etc. since the caller does not have to manage a local
17485buffer.
17486
17487
17488 ASL Compiler, Version X2025:
17489
17490The ACPI 2.0 Switch/Case/Default operators have been implemented
17491and are fully functional.  They will work with all ACPI 1.0
17492interpreters, since the operators are simply translated to If/Else
17493pairs.
17494
17495The ACPI 2.0 ElseIf operator is implemented and will also work
17496with 1.0 interpreters, for the same reason.
17497
17498Implemented support for ACPI 2.0 variable-length packages.  These
17499packages have a separate opcode, and their size is determined by
17500the interpreter at run-time.
17501
17502Documentation The ACPI CA Programmer Reference has been updated to
17503reflect the new interfaces and changes to existing interfaces.
17504
17505 ------------------------------------------
17506Summary of changes for this label: 06_15_01
17507
17508 ACPI CA Core Subsystem:
17509
17510Fixed a problem where a DWORD-accessed field within a Buffer
17511object would get its byte address inadvertently rounded down to
17512the nearest DWORD.  Buffers are always Byte-accessible.
17513
17514 ASL Compiler, version X2024:
17515
17516Fixed a problem where the Switch() operator would either fault or
17517hang the compiler.  Note however, that the AML code for this ACPI
175182.0 operator is not yet implemented.
17519
17520Compiler uses the new AcpiOsGetTimer interface to obtain compile
17521timings.
17522
17523Implementation of the CreateField operator automatically converts
17524a reference to a named field within a resource descriptor from a
17525byte offset to a bit offset if required.
17526
17527Added some missing named fields from the resource descriptor
17528support. These are the names that are automatically created by the
17529compiler to reference fields within a descriptor.  They are only
17530valid at compile time and are not passed through to the AML
17531interpreter.
17532
17533Resource descriptor named fields are now typed as Integers and
17534subject to compile-time typechecking when used in expressions.
17535
17536 ------------------------------------------
17537Summary of changes for this label: 05_18_01
17538
17539 ACPI CA Core Subsystem:
17540
17541Fixed a couple of problems in the Field support code where bits
17542from adjacent fields could be returned along with the proper field
17543bits. Restructured the field support code to improve performance,
17544readability and maintainability.
17545
17546New DEBUG_PRINTP macro automatically inserts the procedure name
17547into the output, saving hundreds of copies of procedure name
17548strings within the source, shrinking the memory footprint of the
17549debug version of the core subsystem.
17550
17551 Source Code Structure:
17552
17553The source code directory tree was restructured to reflect the
17554current organization of the component architecture.  Some files
17555and directories have been moved and/or renamed.
17556
17557 Linux:
17558
17559Fixed leaking kacpidpc processes.
17560
17561Fixed queueing event data even when /proc/acpi/event is not
17562opened.
17563
17564 ASL Compiler, version X2020:
17565
17566Memory allocation performance enhancement - over 24X compile time
17567improvement on large ASL files.  Parse nodes and namestring
17568buffers are now allocated from a large internal compiler buffer.
17569
17570The temporary .SRC file is deleted unless the "-s" option is
17571specified
17572
17573The "-d" debug output option now sends all output to the .DBG file
17574instead of the console.
17575
17576"External" second parameter is now optional
17577
17578"ElseIf" syntax now properly allows the predicate
17579
17580Last operand to "Load" now recognized as a Target operand
17581
17582Debug object can now be used anywhere as a normal object.
17583
17584ResourceTemplate now returns an object of type BUFFER
17585
17586EISAID now returns an object of type INTEGER
17587
17588"Index" now works with a STRING operand
17589
17590"LoadTable" now accepts optional parameters
17591
17592"ToString" length parameter is now optional
17593
17594"Interrupt (ResourceType," parse error fixed.
17595
17596"Register" with a user-defined region space parse error fixed
17597
17598Escaped backslash at the end of a string ("\\") scan/parse error
17599fixed
17600
17601"Revision" is now an object of type INTEGER.
17602
17603
17604
17605------------------------------------------
17606Summary of changes for this label: 05_02_01
17607
17608Linux:
17609
17610/proc/acpi/event now blocks properly.
17611
17612Removed /proc/sys/acpi. You can still dump your DSDT from
17613/proc/acpi/dsdt.
17614
17615 ACPI CA Core Subsystem:
17616
17617Fixed a problem introduced in the previous label where some of the
17618"small" resource descriptor types were not recognized.
17619
17620Improved error messages for the case where an ASL Field is outside
17621the range of the parent operation region.
17622
17623 ASL Compiler, version X2018:
17624
17625
17626Added error detection for ASL Fields that extend beyond the length
17627of the parent operation region (only if the length of the region
17628is known at compile time.)  This includes fields that have a
17629minimum access width that is smaller than the parent region, and
17630individual field units that are partially or entirely beyond the
17631extent of the parent.
17632
17633
17634
17635------------------------------------------
17636Summary of changes for this label: 04_27_01
17637
17638 ACPI CA Core Subsystem:
17639
17640Fixed a problem where the namespace mutex could be released at the
17641wrong time during execution of AcpiRemoveAddressSpaceHandler.
17642
17643Added optional thread ID output for debug traces, to simplify
17644debugging of multiple threads.  Added context switch notification
17645when the debug code realizes that a different thread is now
17646executing ACPI code.
17647
17648Some additional external data types have been prefixed with the
17649string "ACPI_" for consistency.  This may effect existing code.
17650The data types affected are the external callback typedefs - e.g.,
17651
17652WALK_CALLBACK becomes ACPI_WALK_CALLBACK.
17653
17654 Linux:
17655
17656Fixed an issue with the OSL semaphore implementation where a
17657thread was waking up with an error from receiving a SIGCHLD
17658signal.
17659
17660Linux version of ACPI CA now uses the system C library for string
17661manipulation routines instead of a local implementation.
17662
17663Cleaned up comments and removed TBDs.
17664
17665 ASL Compiler, version X2017:
17666
17667Enhanced error detection and reporting for all file I/O
17668operations.
17669
17670 Documentation:
17671
17672Programmer Reference updated to version 1.06.
17673
17674
17675
17676------------------------------------------
17677Summary of changes for this label: 04_13_01
17678
17679 ACPI CA Core Subsystem:
17680
17681Restructured support for BufferFields and RegionFields.
17682BankFields support is now fully operational.  All known 32-bit
17683limitations on field sizes have been removed.  Both BufferFields
17684and (Operation) RegionFields are now supported by the same field
17685management code.
17686
17687Resource support now supports QWORD address and IO resources. The
1768816/32/64 bit address structures and the Extended IRQ structure
17689have been changed to properly handle Source Resource strings.
17690
17691A ThreadId of -1 is now used to indicate a "mutex not acquired"
17692condition internally and must never be returned by AcpiOsThreadId.
17693This reserved value was changed from 0 since Unix systems allow a
17694thread ID of 0.
17695
17696Linux:
17697
17698Driver code reorganized to enhance portability
17699
17700Added a kernel configuration option to control ACPI_DEBUG
17701
17702Fixed the EC driver to honor _GLK.
17703
17704ASL Compiler, version X2016:
17705
17706Fixed support for the "FixedHw" keyword.  Previously, the FixedHw
17707address space was set to 0, not 0x7f as it should be.
17708
17709 ------------------------------------------
17710Summary of changes for this label: 03_13_01
17711
17712 ACPI CA Core Subsystem:
17713
17714During ACPI initialization, the _SB_._INI method is now run if
17715present.
17716
17717Notify handler fix - notifies are deferred until the parent method
17718completes execution.  This fixes the "mutex already acquired"
17719issue seen occasionally.
17720
17721Part of the "implicit conversion" rules in ACPI 2.0 have been
17722found to cause compatibility problems with existing ASL/AML.  The
17723convert "result-to-target-type" implementation has been removed
17724for stores to method Args and Locals.  Source operand conversion
17725is still fully implemented.  Possible changes to ACPI 2.0
17726specification pending.
17727
17728Fix to AcpiRsCalculatePciRoutingTableLength to return correct
17729length.
17730
17731Fix for compiler warnings for 64-bit compiles.
17732
17733 Linux:
17734
17735/proc output aligned for easier parsing.
17736
17737Release-version compile problem fixed.
17738
17739New kernel configuration options documented in Configure.help.
17740
17741IBM 600E - Fixed Sleep button may generate "Invalid <NULL>
17742context" message.
17743
17744 OSPM:
17745
17746Power resource driver integrated with bus manager.
17747
17748Fixed kernel fault during active cooling for thermal zones.
17749
17750Source Code:
17751
17752The source code tree has been restructured.
17753
17754
17755
17756------------------------------------------
17757Summary of changes for this label: 03_02_01
17758
17759 Linux OS Services Layer (OSL):
17760
17761Major revision of all Linux-specific code.
17762
17763Modularized all ACPI-specific drivers.
17764
17765Added new thermal zone and power resource drivers.
17766
17767Revamped /proc interface (new functionality is under /proc/acpi).
17768
17769New kernel configuration options.
17770
17771 Linux known issues:
17772
17773New kernel configuration options not documented in Configure.help
17774yet.
17775
17776
17777Module dependencies not currently implemented. If used, they
17778should be loaded in this order: busmgr, power, ec, system,
17779processor, battery, ac_adapter, button, thermal.
17780
17781Modules will not load if CONFIG_MODVERSION is set.
17782
17783IBM 600E - entering S5 may reboot instead of shutting down.
17784
17785IBM 600E - Sleep button may generate "Invalid <NULL> context"
17786message.
17787
17788Some systems may fail with "execution mutex already acquired"
17789message.
17790
17791 ACPI CA Core Subsystem:
17792
17793Added a new OSL Interface, AcpiOsGetThreadId.  This was required
17794for the  deadlock detection code. Defined to return a non-zero, 32-
17795bit thread ID for the currently executing thread.  May be a non-
17796zero constant integer on single-thread systems.
17797
17798Implemented deadlock detection for internal subsystem mutexes.  We
17799may add conditional compilation for this code (debug only) later.
17800
17801ASL/AML Mutex object semantics are now fully supported.  This
17802includes multiple acquires/releases by owner and support for the
17803
17804Mutex SyncLevel parameter.
17805
17806A new "Force Release" mechanism automatically frees all ASL
17807Mutexes that have been acquired but not released when a thread
17808exits the interpreter.  This forces conformance to the ACPI spec
17809("All mutexes must be released when an invocation exits") and
17810prevents deadlocked ASL threads.  This mechanism can be expanded
17811(later) to monitor other resource acquisitions if OEM ASL code
17812continues to misbehave (which it will).
17813
17814Several new ACPI exception codes have been added for the Mutex
17815support.
17816
17817Recursive method calls are now allowed and supported (the ACPI
17818spec does in fact allow recursive method calls.)  The number of
17819recursive calls is subject to the restrictions imposed by the
17820SERIALIZED method keyword and SyncLevel (ACPI 2.0) method
17821parameter.
17822
17823Implemented support for the SyncLevel parameter for control
17824methods (ACPI 2.0 feature)
17825
17826Fixed a deadlock problem when multiple threads attempted to use
17827the interpreter.
17828
17829Fixed a problem where the string length of a String package
17830element was not always set in a package returned from
17831AcpiEvaluateObject.
17832
17833Fixed a problem where the length of a String package element was
17834not always included in the length of the overall package returned
17835from AcpiEvaluateObject.
17836
17837Added external interfaces (Acpi*) to the ACPI debug memory
17838manager.  This manager keeps a list of all outstanding
17839allocations, and can therefore detect memory leaks and attempts to
17840free memory blocks more than once. Useful for code such as the
17841power manager, etc.  May not be appropriate for device drivers.
17842Performance with the debug code enabled is slow.
17843
17844The ACPI Global Lock is now an optional hardware element.
17845
17846 ASL Compiler Version X2015:
17847
17848Integrated changes to allow the compiler to be generated on
17849multiple platforms.
17850
17851Linux makefile added to generate the compiler on Linux
17852
17853 Source Code:
17854
17855All platform-specific headers have been moved to their own
17856subdirectory, Include/Platform.
17857
17858New source file added, Interpreter/ammutex.c
17859
17860New header file, Include/acstruct.h
17861
17862 Documentation:
17863
17864The programmer reference has been updated for the following new
17865interfaces: AcpiOsGetThreadId AcpiAllocate AcpiCallocate AcpiFree
17866
17867 ------------------------------------------
17868Summary of changes for this label: 02_08_01
17869
17870Core ACPI CA Subsystem: Fixed a problem where an error was
17871incorrectly returned if the return resource buffer was larger than
17872the actual data (in the resource interfaces).
17873
17874References to named objects within packages are resolved to the
17875
17876full pathname string before packages are returned directly (via
17877the AcpiEvaluateObject interface) or indirectly via the resource
17878interfaces.
17879
17880Linux OS Services Layer (OSL):
17881
17882Improved /proc battery interface.
17883
17884
17885Added C-state debugging output and other miscellaneous fixes.
17886
17887ASL Compiler Version X2014:
17888
17889All defined method arguments can now be used as local variables,
17890including the ones that are not actually passed in as parameters.
17891The compiler tracks initialization of the arguments and issues an
17892exception if they are used without prior assignment (just like
17893locals).
17894
17895The -o option now specifies a filename prefix that is used for all
17896output files, including the AML output file.  Otherwise, the
17897default behavior is as follows:  1) the AML goes to the file
17898specified in the DSDT.  2) all other output files use the input
17899source filename as the base.
17900
17901 ------------------------------------------
17902Summary of changes for this label: 01_25_01
17903
17904Core ACPI CA Subsystem: Restructured the implementation of object
17905store support within the  interpreter.  This includes support for
17906the Store operator as well  as any ASL operators that include a
17907target operand.
17908
17909Partially implemented support for Implicit Result-to-Target
17910conversion. This is when a result object is converted on the fly
17911to the type of  an existing target object.  Completion of this
17912support is pending  further analysis of the ACPI specification
17913concerning this matter.
17914
17915CPU-specific code has been removed from the subsystem (hardware
17916directory).
17917
17918New Power Management Timer functions added
17919
17920Linux OS Services Layer (OSL): Moved system state transition code
17921to the core, fixed it, and modified  Linux OSL accordingly.
17922
17923Fixed C2 and C3 latency calculations.
17924
17925
17926We no longer use the compilation date for the version message on
17927initialization, but retrieve the version from AcpiGetSystemInfo().
17928
17929Incorporated for fix Sony VAIO machines.
17930
17931Documentation:  The Programmer Reference has been updated and
17932reformatted.
17933
17934
17935ASL Compiler:  Version X2013: Fixed a problem where the line
17936numbering and error reporting could get out  of sync in the
17937presence of multiple include files.
17938
17939 ------------------------------------------
17940Summary of changes for this label: 01_15_01
17941
17942Core ACPI CA Subsystem:
17943
17944Implemented support for type conversions in the execution of the
17945ASL  Concatenate operator (The second operand is converted to
17946match the type  of the first operand before concatenation.)
17947
17948Support for implicit source operand conversion is partially
17949implemented.   The ASL source operand types Integer, Buffer, and
17950String are freely  interchangeable for most ASL operators and are
17951converted by the interpreter  on the fly as required.  Implicit
17952Target operand conversion (where the  result is converted to the
17953target type before storing) is not yet implemented.
17954
17955Support for 32-bit and 64-bit BCD integers is implemented.
17956
17957Problem fixed where a field read on an aligned field could cause a
17958read  past the end of the field.
17959
17960New exception, AE_AML_NO_RETURN_VALUE, is returned when a method
17961does not return a value, but the caller expects one.  (The ASL
17962compiler flags this as a warning.)
17963
17964ASL Compiler:
17965
17966Version X2011:
179671. Static typechecking of all operands is implemented. This
17968prevents the use of invalid objects (such as using a Package where
17969an Integer is required) at compile time instead of at interpreter
17970run-time.
179712. The ASL source line is printed with ALL errors and warnings.
179723. Bug fix for source EOF without final linefeed.
179734. Debug option is split into a parse trace and a namespace trace.
179745. Namespace output option (-n) includes initial values for
17975integers and strings.
179766. Parse-only option added for quick syntax checking.
179777. Compiler checks for duplicate ACPI name declarations
17978
17979Version X2012:
179801. Relaxed typechecking to allow interchangeability between
17981strings, integers, and buffers.  These types are now converted by
17982the interpreter at runtime.
179832. Compiler reports time taken by each internal subsystem in the
17984debug         output file.
17985
17986
17987 ------------------------------------------
17988Summary of changes for this label: 12_14_00
17989
17990ASL Compiler:
17991
17992This is the first official release of the compiler. Since the
17993compiler requires elements of the Core Subsystem, this label
17994synchronizes everything.
17995
17996------------------------------------------
17997Summary of changes for this label: 12_08_00
17998
17999
18000Fixed a problem where named references within the ASL definition
18001of both OperationRegions and CreateXXXFields did not work
18002properly.  The symptom was an AE_AML_OPERAND_TYPE during
18003initialization of the region/field. This is similar (but not
18004related internally) to the problem that was fixed in the last
18005label.
18006
18007Implemented both 32-bit and 64-bit support for the BCD ASL
18008functions ToBCD and FromBCD.
18009
18010Updated all legal headers to include "2000" in the copyright
18011years.
18012
18013 ------------------------------------------
18014Summary of changes for this label: 12_01_00
18015
18016Fixed a problem where method invocations within the ASL definition
18017of both OperationRegions and CreateXXXFields did not work
18018properly.  The symptom was an AE_AML_OPERAND_TYPE during
18019initialization of the region/field:
18020
18021  nsinit-0209: AE_AML_OPERAND_TYPE while getting region arguments
18022[DEBG]   ammonad-0284: Exec_monadic2_r/Not: bad operand(s)
18023(0x3005)
18024
18025Fixed a problem where operators with more than one nested
18026subexpression would fail.  The symptoms were varied, by mostly
18027AE_AML_OPERAND_TYPE errors.  This was actually a rather serious
18028problem that has gone unnoticed until now.
18029
18030  Subtract (Add (1,2), Multiply (3,4))
18031
18032Fixed a problem where AcpiGetHandle didn't quite get fixed in the
18033previous build (The prefix part of a relative path was handled
18034incorrectly).
18035
18036Fixed a problem where Operation Region initialization failed if
18037the operation region name was a "namepath" instead of a simple
18038"nameseg". Symptom was an AE_NO_OPERAND error.
18039
18040Fixed a problem where an assignment to a local variable via the
18041indirect RefOf mechanism only worked for the first such
18042assignment.  Subsequent assignments were ignored.
18043
18044 ------------------------------------------
18045Summary of changes for this label: 11_15_00
18046
18047ACPI 2.0 table support with backwards support for ACPI 1.0 and the
180480.71 extensions.  Note: although we can read ACPI 2.0 BIOS tables,
18049the AML  interpreter does NOT have support for the new 2.0 ASL
18050grammar terms at this time.
18051
18052All ACPI hardware access is via the GAS structures in the ACPI 2.0
18053FADT.
18054
18055All physical memory addresses across all platforms are now 64 bits
18056wide. Logical address width remains dependent on the platform
18057(i.e., "void *").
18058
18059AcpiOsMapMemory interface changed to a 64-bit physical address.
18060
18061The AML interpreter integer size is now 64 bits, as per the ACPI
180622.0 specification.
18063
18064For backwards compatibility with ACPI 1.0, ACPI tables with a
18065revision number less than 2 use 32-bit integers only.
18066
18067Fixed a problem where the evaluation of OpRegion operands did not
18068always resolve them to numbers properly.
18069
18070------------------------------------------
18071Summary of changes for this label: 10_20_00
18072
18073Fix for CBN_._STA issue.  This fix will allow correct access to
18074CBN_ OpRegions when the _STA returns 0x8.
18075
18076Support to convert ACPI constants (Ones, Zeros, One) to actual
18077values before a package object is returned
18078
18079Fix for method call as predicate to if/while construct causing
18080incorrect if/while behavior
18081
18082Fix for Else block package lengths sometimes calculated wrong (if
18083block > 63 bytes)
18084
18085Fix for Processor object length field, was always zero
18086
18087Table load abort if FACP sanity check fails
18088
18089Fix for problem with Scope(name) if name already exists
18090
18091Warning emitted if a named object referenced cannot be found
18092(resolved) during method execution.
18093
18094
18095
18096
18097
18098------------------------------------------
18099Summary of changes for this label: 9_29_00
18100
18101New table initialization interfaces: AcpiInitializeSubsystem no
18102longer has any parameters AcpiFindRootPointer - Find the RSDP (if
18103necessary) AcpiLoadTables (RSDP) - load all tables found at RSDP-
18104>RSDT Obsolete Interfaces AcpiLoadFirmwareTables - replaced by
18105AcpiLoadTables
18106
18107Note: These interface changes require changes to all existing OSDs
18108
18109The PCI_Config default address space handler is always installed
18110at the root namespace object.
18111
18112-------------------------------------------
18113Summary of changes for this label: 09_15_00
18114
18115The new initialization architecture is implemented.  New
18116interfaces are: AcpiInitializeSubsystem (replaces AcpiInitialize)
18117AcpiEnableSubsystem Obsolete Interfaces: AcpiLoadNamespace
18118
18119(Namespace is automatically loaded when a table is loaded)
18120
18121The ACPI_OPERAND_OBJECT has been optimized to shrink its size from
1812252 bytes to 32 bytes.  There is usually one of these for every
18123namespace object, so the memory savings is significant.
18124
18125Implemented just-in-time evaluation of the CreateField operators.
18126
18127Bug fixes for IA-64 support have been integrated.
18128
18129Additional code review comments have been implemented
18130
18131The so-called "third pass parse" has been replaced by a final walk
18132through the namespace to initialize all operation regions (address
18133spaces) and fields that have not yet been initialized during the
18134execution of the various _INI and REG methods.
18135
18136New file - namespace/nsinit.c
18137
18138-------------------------------------------
18139Summary of changes for this label: 09_01_00
18140
18141Namespace manager data structures have been reworked to change the
18142primary  object from a table to a single object.  This has
18143resulted in dynamic memory  savings of 3X within the namespace and
181442X overall in the ACPI CA subsystem.
18145
18146Fixed problem where the call to AcpiEvFindPciRootBuses was
18147inadvertently left  commented out.
18148
18149Reduced the warning count when generating the source with the GCC
18150compiler.
18151
18152Revision numbers added to each module header showing the
18153SourceSafe version of the file.  Please refer to this version
18154number when giving us feedback or comments on individual modules.
18155
18156The main object types within the subsystem have been renamed to
18157clarify their  purpose:
18158
18159ACPI_INTERNAL_OBJECT -> ACPI_OPERAND_OBJECT
18160ACPI_GENERIC_OP -> ACPI_PARSE_OBJECT
18161ACPI_NAME_TABLE_ENTRY -> ACPI_NAMESPACE_NODE
18162
18163NOTE: no changes to the initialization sequence are included in
18164this label.
18165
18166-------------------------------------------
18167Summary of changes for this label: 08_23_00
18168
18169Fixed problem where TerminateControlMethod was being called
18170multiple times per  method
18171
18172Fixed debugger problem where single stepping caused a semaphore to
18173be  oversignalled
18174
18175Improved performance through additional parse object caching -
18176added  ACPI_EXTENDED_OP type
18177
18178-------------------------------------------
18179Summary of changes for this label: 08_10_00
18180
18181Parser/Interpreter integration:  Eliminated the creation of
18182complete parse trees  for ACPI tables and control methods.
18183Instead, parse subtrees are created and  then deleted as soon as
18184they are processed (Either entered into the namespace or  executed
18185by the interpreter).  This reduces the use of dynamic kernel
18186memory  significantly. (about 10X)
18187
18188Exception codes broken into classes and renumbered.  Be sure to
18189recompile all  code that includes acexcep.h.  Hopefully we won't
18190have to renumber the codes  again now that they are split into
18191classes (environment, programmer, AML code,  ACPI table, and
18192internal).
18193
18194Fixed some additional alignment issues in the Resource Manager
18195subcomponent
18196
18197Implemented semaphore tracking in the AcpiExec utility, and fixed
18198several places  where mutexes/semaphores were being unlocked
18199without a corresponding lock  operation.  There are no known
18200semaphore or mutex "leaks" at this time.
18201
18202Fixed the case where an ASL Return operator is used to return an
18203unnamed  package.
18204
18205-------------------------------------------
18206Summary of changes for this label: 07_28_00
18207
18208Fixed a problem with the way addresses were calculated in
18209AcpiAmlReadFieldData()  and AcpiAmlWriteFieldData(). This problem
18210manifested itself when a Field was  created with WordAccess or
18211DwordAccess, but the field unit defined within the  Field was less
18212
18213than a Word or Dword.
18214
18215Fixed a problem in AmlDumpOperands() module's loop to pull
18216operands off of the  operand stack to display information. The
18217problem manifested itself as a TLB  error on 64-bit systems when
18218accessing an operand stack with two or more  operands.
18219
18220Fixed a problem with the PCI configuration space handlers where
18221context was  getting confused between accesses. This required a
18222change to the generic address  space handler and address space
18223setup definitions. Handlers now get both a  global handler context
18224(this is the one passed in by the user when executing
18225AcpiInstallAddressSpaceHandler() and a specific region context
18226that is unique to  each region (For example, the _ADR, _SEG and
18227_BBN values associated with a  specific region). The generic
18228function definitions have changed to the  following:
18229
18230typedef ACPI_STATUS (*ADDRESS_SPACE_HANDLER) ( UINT32 Function,
18231UINT32 Address, UINT32 BitWidth, UINT32 *Value, void
18232*HandlerContext, // This used to be void *Context void
18233*RegionContext); // This is an additional parameter
18234
18235typedef ACPI_STATUS (*ADDRESS_SPACE_SETUP) ( ACPI_HANDLE
18236RegionHandle, UINT32 Function, void *HandlerContext,  void
18237**RegionContext); // This used to be **ReturnContext
18238
18239-------------------------------------------
18240Summary of changes for this label: 07_21_00
18241
18242Major file consolidation and rename.  All files within the
18243interpreter have been  renamed as well as most header files.  This
18244was done to prevent collisions with  existing files in the host
18245OSs -- filenames such as "config.h" and "global.h"  seem to be
18246quite common.  The VC project files have been updated.  All
18247makefiles  will require modification.
18248
18249The parser/interpreter integration continues in Phase 5 with the
18250implementation  of a complete 2-pass parse (the AML is parsed
18251twice) for each table;  This  avoids the construction of a huge
18252parse tree and therefore reduces the amount of  dynamic memory
18253required by the subsystem.  Greater use of the parse object cache
18254means that performance is unaffected.
18255
18256Many comments from the two code reviews have been rolled in.
18257
18258The 64-bit alignment support is complete.
18259
18260-------------------------------------------
18261Summary of changes for this label: 06_30_00
18262
18263With a nod and a tip of the hat to the technology of yesteryear,
18264we've added  support in the source code for 80 column output
18265devices.  The code is now mostly  constrained to 80 columns or
18266less to support environments and editors that 1)  cannot display
18267or print more than 80 characters on a single line, and 2) cannot
18268disable line wrapping.
18269
18270A major restructuring of the namespace data structure has been
18271completed.  The  result is 1) cleaner and more
18272understandable/maintainable code, and 2) a  significant reduction
18273in the dynamic memory requirement for each named ACPI  object
18274(almost half).
18275
18276-------------------------------------------
18277Summary of changes for this label: 06_23_00
18278
18279Linux support has been added.  In order to obtain approval to get
18280the ACPI CA  subsystem into the Linux kernel, we've had to make
18281quite a few changes to the  base subsystem that will affect all
18282users (all the changes are generic and OS- independent).  The
18283effects of these global changes have been somewhat far  reaching.
18284Files have been merged and/or renamed and interfaces have been
18285renamed.   The major changes are described below.
18286
18287Osd* interfaces renamed to AcpiOs* to eliminate namespace
18288pollution/confusion  within our target kernels.  All OSD
18289interfaces must be modified to match the new  naming convention.
18290
18291Files merged across the subsystem.  A number of the smaller source
18292and header  files have been merged to reduce the file count and
18293increase the density of the  existing files.  There are too many
18294to list here.  In general, makefiles that  call out individual
18295files will require rebuilding.
18296
18297Interpreter files renamed.  All interpreter files now have the
18298prefix am*  instead of ie* and is*.
18299
18300Header files renamed:  The acapi.h file is now acpixf.h.  The
18301acpiosd.h file is  now acpiosxf.h.  We are removing references to
18302the acronym "API" since it is  somewhat windowsy. The new name is
18303"external interface" or xface or xf in the  filenames.j
18304
18305
18306All manifest constants have been forced to upper case (some were
18307mixed case.)   Also, the string "ACPI_" has been prepended to many
18308(not all) of the constants,  typedefs, and structs.
18309
18310The globals "DebugLevel" and "DebugLayer" have been renamed
18311"AcpiDbgLevel" and  "AcpiDbgLayer" respectively.
18312
18313All other globals within the subsystem are now prefixed with
18314"AcpiGbl_" Internal procedures within the subsystem are now
18315prefixed with "Acpi" (with only  a few exceptions).  The original
18316two-letter abbreviation for the subcomponent  remains after "Acpi"
18317- for example, CmCallocate became AcpiCmCallocate.
18318
18319Added a source code translation/conversion utility.  Used to
18320generate the Linux  source code, it can be modified to generate
18321other types of source as well. Can  also be used to cleanup
18322existing source by removing extraneous spaces and blank  lines.
18323Found in tools/acpisrc/*
18324
18325OsdUnMapMemory was renamed to OsdUnmapMemory and then
18326AcpiOsUnmapMemory.  (UnMap  became Unmap).
18327
18328A "MaxUnits" parameter has been added to AcpiOsCreateSemaphore.
18329When set to  one, this indicates that the caller wants to use the
18330
18331semaphore as a mutex, not a  counting semaphore.  ACPI CA uses
18332both types.  However, implementers of this  call may want to use
18333different OS primitives depending on the type of semaphore
18334requested.  For example, some operating systems provide separate
18335
18336"mutex" and  "semaphore" interfaces - where the mutex interface is
18337much faster because it  doesn't have all the overhead of a full
18338semaphore implementation.
18339
18340Fixed a deadlock problem where a method that accesses the PCI
18341address space can  block forever if it is the first access to the
18342space.
18343
18344-------------------------------------------
18345Summary of changes for this label: 06_02_00
18346
18347Support for environments that cannot handle unaligned data
18348accesses (e.g.  firmware and OS environments devoid of alignment
18349handler technology namely  SAL/EFI and the IA-64 Linux kernel) has
18350been added (via configurable macros) in  these three areas: -
18351Transfer of data from the raw AML byte stream is done via byte
18352moves instead of    word/dword/qword moves. - External objects are
18353aligned within the user buffer, including package   elements (sub-
18354objects). - Conversion of name strings to UINT32 Acpi Names is now
18355done byte-wise.
18356
18357The Store operator was modified to mimic Microsoft's
18358implementation when storing  to a Buffer Field.
18359
18360Added a check of the BM_STS bit before entering C3.
18361
18362The methods subdirectory has been obsoleted and removed.  A new
18363file, cmeval.c  subsumes the functionality.
18364
18365A 16-bit (DOS) version of AcpiExec has been developed.  The
18366makefile is under  the acpiexec directory.
18367