1 /******************************************************************************
2 *
3 * Module Name: nsload - namespace loading/expanding/contracting procedures
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2018, Intel Corp.
12 * All rights reserved.
13 *
14 * 2. License
15 *
16 * 2.1. This is your license from Intel Corp. under its intellectual property
17 * rights. You may have additional license terms from the party that provided
18 * you this software, covering your right to use that party's intellectual
19 * property rights.
20 *
21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
22 * copy of the source code appearing in this file ("Covered Code") an
23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the
24 * base code distributed originally by Intel ("Original Intel Code") to copy,
25 * make derivatives, distribute, use and display any portion of the Covered
26 * Code in any form, with the right to sublicense such rights; and
27 *
28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
29 * license (with the right to sublicense), under only those claims of Intel
30 * patents that are infringed by the Original Intel Code, to make, use, sell,
31 * offer to sell, and import the Covered Code and derivative works thereof
32 * solely to the minimum extent necessary to exercise the above copyright
33 * license, and in no event shall the patent license extend to any additions
34 * to or modifications of the Original Intel Code. No other license or right
35 * is granted directly or by implication, estoppel or otherwise;
36 *
37 * The above copyright and patent license is granted only if the following
38 * conditions are met:
39 *
40 * 3. Conditions
41 *
42 * 3.1. Redistribution of Source with Rights to Further Distribute Source.
43 * Redistribution of source code of any substantial portion of the Covered
44 * Code or modification with rights to further distribute source must include
45 * the above Copyright Notice, the above License, this list of Conditions,
46 * and the following Disclaimer and Export Compliance provision. In addition,
47 * Licensee must cause all Covered Code to which Licensee contributes to
48 * contain a file documenting the changes Licensee made to create that Covered
49 * Code and the date of any change. Licensee must include in that file the
50 * documentation of any changes made by any predecessor Licensee. Licensee
51 * must include a prominent statement that the modification is derived,
52 * directly or indirectly, from Original Intel Code.
53 *
54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
55 * Redistribution of source code of any substantial portion of the Covered
56 * Code or modification without rights to further distribute source must
57 * include the following Disclaimer and Export Compliance provision in the
58 * documentation and/or other materials provided with distribution. In
59 * addition, Licensee may not authorize further sublicense of source of any
60 * portion of the Covered Code, and must include terms to the effect that the
61 * license from Licensee to its licensee is limited to the intellectual
62 * property embodied in the software Licensee provides to its licensee, and
63 * not to intellectual property embodied in modifications its licensee may
64 * make.
65 *
66 * 3.3. Redistribution of Executable. Redistribution in executable form of any
67 * substantial portion of the Covered Code or modification must reproduce the
68 * above Copyright Notice, and the following Disclaimer and Export Compliance
69 * provision in the documentation and/or other materials provided with the
70 * distribution.
71 *
72 * 3.4. Intel retains all right, title, and interest in and to the Original
73 * Intel Code.
74 *
75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by
76 * Intel shall be used in advertising or otherwise to promote the sale, use or
77 * other dealings in products derived from or relating to the Covered Code
78 * without prior written authorization from Intel.
79 *
80 * 4. Disclaimer and Export Compliance
81 *
82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
88 * PARTICULAR PURPOSE.
89 *
90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
97 * LIMITED REMEDY.
98 *
99 * 4.3. Licensee shall not export, either directly or indirectly, any of this
100 * software or system incorporating such software without first obtaining any
101 * required license or other approval from the U. S. Department of Commerce or
102 * any other agency or department of the United States Government. In the
103 * event Licensee exports any such software from the United States or
104 * re-exports any such software from a foreign destination, Licensee shall
105 * ensure that the distribution and export/re-export of the software is in
106 * compliance with all laws, regulations, orders, or other restrictions of the
107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
108 * any of its subsidiaries will export/re-export any technical data, process,
109 * software, or service, directly or indirectly, to any country for which the
110 * United States government or any agency thereof requires an export license,
111 * other governmental approval, or letter of assurance, without first obtaining
112 * such license, approval or letter.
113 *
114 *****************************************************************************
115 *
116 * Alternatively, you may choose to be licensed under the terms of the
117 * following license:
118 *
119 * Redistribution and use in source and binary forms, with or without
120 * modification, are permitted provided that the following conditions
121 * are met:
122 * 1. Redistributions of source code must retain the above copyright
123 * notice, this list of conditions, and the following disclaimer,
124 * without modification.
125 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
126 * substantially similar to the "NO WARRANTY" disclaimer below
127 * ("Disclaimer") and any redistribution must be conditioned upon
128 * including a substantially similar Disclaimer requirement for further
129 * binary redistribution.
130 * 3. Neither the names of the above-listed copyright holders nor the names
131 * of any contributors may be used to endorse or promote products derived
132 * from this software without specific prior written permission.
133 *
134 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
135 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
136 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
137 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
138 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
139 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
140 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
141 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
142 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
143 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
144 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
145 *
146 * Alternatively, you may choose to be licensed under the terms of the
147 * GNU General Public License ("GPL") version 2 as published by the Free
148 * Software Foundation.
149 *
150 *****************************************************************************/
151
152 #include "acpi.h"
153 #include "accommon.h"
154 #include "acnamesp.h"
155 #include "acdispat.h"
156 #include "actables.h"
157 #include "acinterp.h"
158
159
160 #define _COMPONENT ACPI_NAMESPACE
161 ACPI_MODULE_NAME ("nsload")
162
163 /* Local prototypes */
164
165 #ifdef ACPI_FUTURE_IMPLEMENTATION
166 ACPI_STATUS
167 AcpiNsUnloadNamespace (
168 ACPI_HANDLE Handle);
169
170 static ACPI_STATUS
171 AcpiNsDeleteSubtree (
172 ACPI_HANDLE StartHandle);
173 #endif
174
175
176 #ifndef ACPI_NO_METHOD_EXECUTION
177 /*******************************************************************************
178 *
179 * FUNCTION: AcpiNsLoadTable
180 *
181 * PARAMETERS: TableIndex - Index for table to be loaded
182 * Node - Owning NS node
183 *
184 * RETURN: Status
185 *
186 * DESCRIPTION: Load one ACPI table into the namespace
187 *
188 ******************************************************************************/
189
190 ACPI_STATUS
AcpiNsLoadTable(UINT32 TableIndex,ACPI_NAMESPACE_NODE * Node)191 AcpiNsLoadTable (
192 UINT32 TableIndex,
193 ACPI_NAMESPACE_NODE *Node)
194 {
195 ACPI_STATUS Status;
196
197
198 ACPI_FUNCTION_TRACE (NsLoadTable);
199
200
201 /* If table already loaded into namespace, just return */
202
203 if (AcpiTbIsTableLoaded (TableIndex))
204 {
205 Status = AE_ALREADY_EXISTS;
206 goto Unlock;
207 }
208
209 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
210 "**** Loading table into namespace ****\n"));
211
212 Status = AcpiTbAllocateOwnerId (TableIndex);
213 if (ACPI_FAILURE (Status))
214 {
215 goto Unlock;
216 }
217
218 /*
219 * Parse the table and load the namespace with all named
220 * objects found within. Control methods are NOT parsed
221 * at this time. In fact, the control methods cannot be
222 * parsed until the entire namespace is loaded, because
223 * if a control method makes a forward reference (call)
224 * to another control method, we can't continue parsing
225 * because we don't know how many arguments to parse next!
226 */
227 Status = AcpiNsParseTable (TableIndex, Node);
228 if (ACPI_SUCCESS (Status))
229 {
230 AcpiTbSetTableLoadedFlag (TableIndex, TRUE);
231 }
232 else
233 {
234 /*
235 * On error, delete any namespace objects created by this table.
236 * We cannot initialize these objects, so delete them. There are
237 * a couple of expecially bad cases:
238 * AE_ALREADY_EXISTS - namespace collision.
239 * AE_NOT_FOUND - the target of a Scope operator does not
240 * exist. This target of Scope must already exist in the
241 * namespace, as per the ACPI specification.
242 */
243 AcpiNsDeleteNamespaceByOwner (
244 AcpiGbl_RootTableList.Tables[TableIndex].OwnerId);
245
246 AcpiTbReleaseOwnerId (TableIndex);
247 return_ACPI_STATUS (Status);
248 }
249
250 Unlock:
251 if (ACPI_FAILURE (Status))
252 {
253 return_ACPI_STATUS (Status);
254 }
255
256 /*
257 * Now we can parse the control methods. We always parse
258 * them here for a sanity check, and if configured for
259 * just-in-time parsing, we delete the control method
260 * parse trees.
261 */
262 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
263 "**** Begin Table Object Initialization\n"));
264
265 AcpiExEnterInterpreter ();
266 Status = AcpiDsInitializeObjects (TableIndex, Node);
267 AcpiExExitInterpreter ();
268
269 ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
270 "**** Completed Table Object Initialization\n"));
271
272 /*
273 * This case handles the legacy option that groups all module-level
274 * code blocks together and defers execution until all of the tables
275 * are loaded. Execute all of these blocks at this time.
276 * Execute any module-level code that was detected during the table
277 * load phase.
278 *
279 * Note: this option is deprecated and will be eliminated in the
280 * future. Use of this option can cause problems with AML code that
281 * depends upon in-order immediate execution of module-level code.
282 */
283 AcpiNsExecModuleCodeList ();
284 return_ACPI_STATUS (Status);
285 }
286
287
288 #ifdef ACPI_OBSOLETE_FUNCTIONS
289 /*******************************************************************************
290 *
291 * FUNCTION: AcpiLoadNamespace
292 *
293 * PARAMETERS: None
294 *
295 * RETURN: Status
296 *
297 * DESCRIPTION: Load the name space from what ever is pointed to by DSDT.
298 * (DSDT points to either the BIOS or a buffer.)
299 *
300 ******************************************************************************/
301
302 ACPI_STATUS
AcpiNsLoadNamespace(void)303 AcpiNsLoadNamespace (
304 void)
305 {
306 ACPI_STATUS Status;
307
308
309 ACPI_FUNCTION_TRACE (AcpiLoadNameSpace);
310
311
312 /* There must be at least a DSDT installed */
313
314 if (AcpiGbl_DSDT == NULL)
315 {
316 ACPI_ERROR ((AE_INFO, "DSDT is not in memory"));
317 return_ACPI_STATUS (AE_NO_ACPI_TABLES);
318 }
319
320 /*
321 * Load the namespace. The DSDT is required,
322 * but the SSDT and PSDT tables are optional.
323 */
324 Status = AcpiNsLoadTableByType (ACPI_TABLE_ID_DSDT);
325 if (ACPI_FAILURE (Status))
326 {
327 return_ACPI_STATUS (Status);
328 }
329
330 /* Ignore exceptions from these */
331
332 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_SSDT);
333 (void) AcpiNsLoadTableByType (ACPI_TABLE_ID_PSDT);
334
335 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT,
336 "ACPI Namespace successfully loaded at root %p\n",
337 AcpiGbl_RootNode));
338
339 return_ACPI_STATUS (Status);
340 }
341 #endif
342
343 #ifdef ACPI_FUTURE_IMPLEMENTATION
344 /*******************************************************************************
345 *
346 * FUNCTION: AcpiNsDeleteSubtree
347 *
348 * PARAMETERS: StartHandle - Handle in namespace where search begins
349 *
350 * RETURNS Status
351 *
352 * DESCRIPTION: Walks the namespace starting at the given handle and deletes
353 * all objects, entries, and scopes in the entire subtree.
354 *
355 * Namespace/Interpreter should be locked or the subsystem should
356 * be in shutdown before this routine is called.
357 *
358 ******************************************************************************/
359
360 static ACPI_STATUS
AcpiNsDeleteSubtree(ACPI_HANDLE StartHandle)361 AcpiNsDeleteSubtree (
362 ACPI_HANDLE StartHandle)
363 {
364 ACPI_STATUS Status;
365 ACPI_HANDLE ChildHandle;
366 ACPI_HANDLE ParentHandle;
367 ACPI_HANDLE NextChildHandle;
368 ACPI_HANDLE Dummy;
369 UINT32 Level;
370
371
372 ACPI_FUNCTION_TRACE (NsDeleteSubtree);
373
374
375 ParentHandle = StartHandle;
376 ChildHandle = NULL;
377 Level = 1;
378
379 /*
380 * Traverse the tree of objects until we bubble back up
381 * to where we started.
382 */
383 while (Level > 0)
384 {
385 /* Attempt to get the next object in this scope */
386
387 Status = AcpiGetNextObject (ACPI_TYPE_ANY, ParentHandle,
388 ChildHandle, &NextChildHandle);
389
390 ChildHandle = NextChildHandle;
391
392 /* Did we get a new object? */
393
394 if (ACPI_SUCCESS (Status))
395 {
396 /* Check if this object has any children */
397
398 if (ACPI_SUCCESS (AcpiGetNextObject (ACPI_TYPE_ANY, ChildHandle,
399 NULL, &Dummy)))
400 {
401 /*
402 * There is at least one child of this object,
403 * visit the object
404 */
405 Level++;
406 ParentHandle = ChildHandle;
407 ChildHandle = NULL;
408 }
409 }
410 else
411 {
412 /*
413 * No more children in this object, go back up to
414 * the object's parent
415 */
416 Level--;
417
418 /* Delete all children now */
419
420 AcpiNsDeleteChildren (ChildHandle);
421
422 ChildHandle = ParentHandle;
423 Status = AcpiGetParent (ParentHandle, &ParentHandle);
424 if (ACPI_FAILURE (Status))
425 {
426 return_ACPI_STATUS (Status);
427 }
428 }
429 }
430
431 /* Now delete the starting object, and we are done */
432
433 AcpiNsRemoveNode (ChildHandle);
434 return_ACPI_STATUS (AE_OK);
435 }
436
437
438 /*******************************************************************************
439 *
440 * FUNCTION: AcpiNsUnloadNameSpace
441 *
442 * PARAMETERS: Handle - Root of namespace subtree to be deleted
443 *
444 * RETURN: Status
445 *
446 * DESCRIPTION: Shrinks the namespace, typically in response to an undocking
447 * event. Deletes an entire subtree starting from (and
448 * including) the given handle.
449 *
450 ******************************************************************************/
451
452 ACPI_STATUS
AcpiNsUnloadNamespace(ACPI_HANDLE Handle)453 AcpiNsUnloadNamespace (
454 ACPI_HANDLE Handle)
455 {
456 ACPI_STATUS Status;
457
458
459 ACPI_FUNCTION_TRACE (NsUnloadNameSpace);
460
461
462 /* Parameter validation */
463
464 if (!AcpiGbl_RootNode)
465 {
466 return_ACPI_STATUS (AE_NO_NAMESPACE);
467 }
468
469 if (!Handle)
470 {
471 return_ACPI_STATUS (AE_BAD_PARAMETER);
472 }
473
474 /* This function does the real work */
475
476 Status = AcpiNsDeleteSubtree (Handle);
477 return_ACPI_STATUS (Status);
478 }
479 #endif
480 #endif
481