1 /******************************************************************************
2 *
3 * Module Name: excreate - Named object creation
4 *
5 *****************************************************************************/
6
7 /******************************************************************************
8 *
9 * 1. Copyright Notice
10 *
11 * Some or all of this work - Copyright (c) 1999 - 2021, 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
87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
89 * PARTICULAR PURPOSE.
90 *
91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
98 * LIMITED REMEDY.
99 *
100 * 4.3. Licensee shall not export, either directly or indirectly, any of this
101 * software or system incorporating such software without first obtaining any
102 * required license or other approval from the U. S. Department of Commerce or
103 * any other agency or department of the United States Government. In the
104 * event Licensee exports any such software from the United States or
105 * re-exports any such software from a foreign destination, Licensee shall
106 * ensure that the distribution and export/re-export of the software is in
107 * compliance with all laws, regulations, orders, or other restrictions of the
108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor
109 * any of its subsidiaries will export/re-export any technical data, process,
110 * software, or service, directly or indirectly, to any country for which the
111 * United States government or any agency thereof requires an export license,
112 * other governmental approval, or letter of assurance, without first obtaining
113 * such license, approval or letter.
114 *
115 *****************************************************************************
116 *
117 * Alternatively, you may choose to be licensed under the terms of the
118 * following license:
119 *
120 * Redistribution and use in source and binary forms, with or without
121 * modification, are permitted provided that the following conditions
122 * are met:
123 * 1. Redistributions of source code must retain the above copyright
124 * notice, this list of conditions, and the following disclaimer,
125 * without modification.
126 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
127 * substantially similar to the "NO WARRANTY" disclaimer below
128 * ("Disclaimer") and any redistribution must be conditioned upon
129 * including a substantially similar Disclaimer requirement for further
130 * binary redistribution.
131 * 3. Neither the names of the above-listed copyright holders nor the names
132 * of any contributors may be used to endorse or promote products derived
133 * from this software without specific prior written permission.
134 *
135 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
136 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
137 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
138 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
139 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
140 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
141 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
142 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
143 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
144 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
145 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
146 *
147 * Alternatively, you may choose to be licensed under the terms of the
148 * GNU General Public License ("GPL") version 2 as published by the Free
149 * Software Foundation.
150 *
151 *****************************************************************************/
152
153 #include "acpi.h"
154 #include "accommon.h"
155 #include "acinterp.h"
156 #include "amlcode.h"
157 #include "acnamesp.h"
158
159
160 #define _COMPONENT ACPI_EXECUTER
161 ACPI_MODULE_NAME ("excreate")
162
163
164 /*******************************************************************************
165 *
166 * FUNCTION: AcpiExCreateAlias
167 *
168 * PARAMETERS: WalkState - Current state, contains operands
169 *
170 * RETURN: Status
171 *
172 * DESCRIPTION: Create a new named alias
173 *
174 ******************************************************************************/
175
176 ACPI_STATUS
AcpiExCreateAlias(ACPI_WALK_STATE * WalkState)177 AcpiExCreateAlias (
178 ACPI_WALK_STATE *WalkState)
179 {
180 ACPI_NAMESPACE_NODE *TargetNode;
181 ACPI_NAMESPACE_NODE *AliasNode;
182 ACPI_STATUS Status = AE_OK;
183
184
185 ACPI_FUNCTION_TRACE (ExCreateAlias);
186
187
188 /* Get the source/alias operands (both namespace nodes) */
189
190 AliasNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
191 TargetNode = (ACPI_NAMESPACE_NODE *) WalkState->Operands[1];
192
193 if ((TargetNode->Type == ACPI_TYPE_LOCAL_ALIAS) ||
194 (TargetNode->Type == ACPI_TYPE_LOCAL_METHOD_ALIAS))
195 {
196 /*
197 * Dereference an existing alias so that we don't create a chain
198 * of aliases. With this code, we guarantee that an alias is
199 * always exactly one level of indirection away from the
200 * actual aliased name.
201 */
202 TargetNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, TargetNode->Object);
203 }
204
205 /* Ensure that the target node is valid */
206
207 if (!TargetNode)
208 {
209 return_ACPI_STATUS (AE_NULL_OBJECT);
210 }
211
212 /* Construct the alias object (a namespace node) */
213
214 switch (TargetNode->Type)
215 {
216 case ACPI_TYPE_METHOD:
217 /*
218 * Control method aliases need to be differentiated with
219 * a special type
220 */
221 AliasNode->Type = ACPI_TYPE_LOCAL_METHOD_ALIAS;
222 break;
223
224 default:
225 /*
226 * All other object types.
227 *
228 * The new alias has the type ALIAS and points to the original
229 * NS node, not the object itself.
230 */
231 AliasNode->Type = ACPI_TYPE_LOCAL_ALIAS;
232 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
233 break;
234 }
235
236 /* Since both operands are Nodes, we don't need to delete them */
237
238 AliasNode->Object = ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, TargetNode);
239 return_ACPI_STATUS (Status);
240 }
241
242
243 /*******************************************************************************
244 *
245 * FUNCTION: AcpiExCreateEvent
246 *
247 * PARAMETERS: WalkState - Current state
248 *
249 * RETURN: Status
250 *
251 * DESCRIPTION: Create a new event object
252 *
253 ******************************************************************************/
254
255 ACPI_STATUS
AcpiExCreateEvent(ACPI_WALK_STATE * WalkState)256 AcpiExCreateEvent (
257 ACPI_WALK_STATE *WalkState)
258 {
259 ACPI_STATUS Status;
260 ACPI_OPERAND_OBJECT *ObjDesc;
261
262
263 ACPI_FUNCTION_TRACE (ExCreateEvent);
264
265
266 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_EVENT);
267 if (!ObjDesc)
268 {
269 Status = AE_NO_MEMORY;
270 goto Cleanup;
271 }
272
273 /*
274 * Create the actual OS semaphore, with zero initial units -- meaning
275 * that the event is created in an unsignalled state
276 */
277 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0,
278 &ObjDesc->Event.OsSemaphore);
279 if (ACPI_FAILURE (Status))
280 {
281 goto Cleanup;
282 }
283
284 /* Attach object to the Node */
285
286 Status = AcpiNsAttachObject (
287 (ACPI_NAMESPACE_NODE *) WalkState->Operands[0],
288 ObjDesc, ACPI_TYPE_EVENT);
289
290 Cleanup:
291 /*
292 * Remove local reference to the object (on error, will cause deletion
293 * of both object and semaphore if present.)
294 */
295 AcpiUtRemoveReference (ObjDesc);
296 return_ACPI_STATUS (Status);
297 }
298
299
300 /*******************************************************************************
301 *
302 * FUNCTION: AcpiExCreateMutex
303 *
304 * PARAMETERS: WalkState - Current state
305 *
306 * RETURN: Status
307 *
308 * DESCRIPTION: Create a new mutex object
309 *
310 * Mutex (Name[0], SyncLevel[1])
311 *
312 ******************************************************************************/
313
314 ACPI_STATUS
AcpiExCreateMutex(ACPI_WALK_STATE * WalkState)315 AcpiExCreateMutex (
316 ACPI_WALK_STATE *WalkState)
317 {
318 ACPI_STATUS Status = AE_OK;
319 ACPI_OPERAND_OBJECT *ObjDesc;
320
321
322 ACPI_FUNCTION_TRACE_PTR (ExCreateMutex, ACPI_WALK_OPERANDS);
323
324
325 /* Create the new mutex object */
326
327 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_MUTEX);
328 if (!ObjDesc)
329 {
330 Status = AE_NO_MEMORY;
331 goto Cleanup;
332 }
333
334 /* Create the actual OS Mutex */
335
336 Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);
337 if (ACPI_FAILURE (Status))
338 {
339 goto Cleanup;
340 }
341
342 /* Init object and attach to NS node */
343
344 ObjDesc->Mutex.SyncLevel = (UINT8) WalkState->Operands[1]->Integer.Value;
345 ObjDesc->Mutex.Node = (ACPI_NAMESPACE_NODE *) WalkState->Operands[0];
346
347 Status = AcpiNsAttachObject (
348 ObjDesc->Mutex.Node, ObjDesc, ACPI_TYPE_MUTEX);
349
350
351 Cleanup:
352 /*
353 * Remove local reference to the object (on error, will cause deletion
354 * of both object and semaphore if present.)
355 */
356 AcpiUtRemoveReference (ObjDesc);
357 return_ACPI_STATUS (Status);
358 }
359
360
361 /*******************************************************************************
362 *
363 * FUNCTION: AcpiExCreateRegion
364 *
365 * PARAMETERS: AmlStart - Pointer to the region declaration AML
366 * AmlLength - Max length of the declaration AML
367 * SpaceId - Address space ID for the region
368 * WalkState - Current state
369 *
370 * RETURN: Status
371 *
372 * DESCRIPTION: Create a new operation region object
373 *
374 ******************************************************************************/
375
376 ACPI_STATUS
AcpiExCreateRegion(UINT8 * AmlStart,UINT32 AmlLength,UINT8 SpaceId,ACPI_WALK_STATE * WalkState)377 AcpiExCreateRegion (
378 UINT8 *AmlStart,
379 UINT32 AmlLength,
380 UINT8 SpaceId,
381 ACPI_WALK_STATE *WalkState)
382 {
383 ACPI_STATUS Status;
384 ACPI_OPERAND_OBJECT *ObjDesc;
385 ACPI_NAMESPACE_NODE *Node;
386 ACPI_OPERAND_OBJECT *RegionObj2;
387
388
389 ACPI_FUNCTION_TRACE (ExCreateRegion);
390
391
392 /* Get the Namespace Node */
393
394 Node = WalkState->Op->Common.Node;
395
396 /*
397 * If the region object is already attached to this node,
398 * just return
399 */
400 if (AcpiNsGetAttachedObject (Node))
401 {
402 return_ACPI_STATUS (AE_OK);
403 }
404
405 /*
406 * Space ID must be one of the predefined IDs, or in the user-defined
407 * range
408 */
409 if (!AcpiIsValidSpaceId (SpaceId))
410 {
411 /*
412 * Print an error message, but continue. We don't want to abort
413 * a table load for this exception. Instead, if the region is
414 * actually used at runtime, abort the executing method.
415 */
416 ACPI_ERROR ((AE_INFO,
417 "Invalid/unknown Address Space ID: 0x%2.2X", SpaceId));
418 }
419
420 ACPI_DEBUG_PRINT ((ACPI_DB_LOAD, "Region Type - %s (0x%X)\n",
421 AcpiUtGetRegionName (SpaceId), SpaceId));
422
423 /* Create the region descriptor */
424
425 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION);
426 if (!ObjDesc)
427 {
428 Status = AE_NO_MEMORY;
429 goto Cleanup;
430 }
431
432 /*
433 * Remember location in AML stream of address & length
434 * operands since they need to be evaluated at run time.
435 */
436 RegionObj2 = AcpiNsGetSecondaryObject (ObjDesc);
437 RegionObj2->Extra.AmlStart = AmlStart;
438 RegionObj2->Extra.AmlLength = AmlLength;
439 RegionObj2->Extra.Method_REG = NULL;
440 if (WalkState->ScopeInfo)
441 {
442 RegionObj2->Extra.ScopeNode = WalkState->ScopeInfo->Scope.Node;
443 }
444 else
445 {
446 RegionObj2->Extra.ScopeNode = Node;
447 }
448
449 /* Init the region from the operands */
450
451 ObjDesc->Region.SpaceId = SpaceId;
452 ObjDesc->Region.Address = 0;
453 ObjDesc->Region.Length = 0;
454 ObjDesc->Region.Pointer = NULL;
455 ObjDesc->Region.Node = Node;
456 ObjDesc->Region.Handler = NULL;
457 ObjDesc->Common.Flags &=
458 ~(AOPOBJ_SETUP_COMPLETE | AOPOBJ_REG_CONNECTED |
459 AOPOBJ_OBJECT_INITIALIZED);
460
461 /* Install the new region object in the parent Node */
462
463 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_REGION);
464
465
466 Cleanup:
467
468 /* Remove local reference to the object */
469
470 AcpiUtRemoveReference (ObjDesc);
471 return_ACPI_STATUS (Status);
472 }
473
474
475 /*******************************************************************************
476 *
477 * FUNCTION: AcpiExCreateProcessor
478 *
479 * PARAMETERS: WalkState - Current state
480 *
481 * RETURN: Status
482 *
483 * DESCRIPTION: Create a new processor object and populate the fields
484 *
485 * Processor (Name[0], CpuID[1], PblockAddr[2], PblockLength[3])
486 *
487 ******************************************************************************/
488
489 ACPI_STATUS
AcpiExCreateProcessor(ACPI_WALK_STATE * WalkState)490 AcpiExCreateProcessor (
491 ACPI_WALK_STATE *WalkState)
492 {
493 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
494 ACPI_OPERAND_OBJECT *ObjDesc;
495 ACPI_STATUS Status;
496
497
498 ACPI_FUNCTION_TRACE_PTR (ExCreateProcessor, WalkState);
499
500
501 /* Create the processor object */
502
503 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PROCESSOR);
504 if (!ObjDesc)
505 {
506 return_ACPI_STATUS (AE_NO_MEMORY);
507 }
508
509 /* Initialize the processor object from the operands */
510
511 ObjDesc->Processor.ProcId = (UINT8) Operand[1]->Integer.Value;
512 ObjDesc->Processor.Length = (UINT8) Operand[3]->Integer.Value;
513 ObjDesc->Processor.Address = (ACPI_IO_ADDRESS) Operand[2]->Integer.Value;
514
515 /* Install the processor object in the parent Node */
516
517 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
518 ObjDesc, ACPI_TYPE_PROCESSOR);
519
520 /* Remove local reference to the object */
521
522 AcpiUtRemoveReference (ObjDesc);
523 return_ACPI_STATUS (Status);
524 }
525
526
527 /*******************************************************************************
528 *
529 * FUNCTION: AcpiExCreatePowerResource
530 *
531 * PARAMETERS: WalkState - Current state
532 *
533 * RETURN: Status
534 *
535 * DESCRIPTION: Create a new PowerResource object and populate the fields
536 *
537 * PowerResource (Name[0], SystemLevel[1], ResourceOrder[2])
538 *
539 ******************************************************************************/
540
541 ACPI_STATUS
AcpiExCreatePowerResource(ACPI_WALK_STATE * WalkState)542 AcpiExCreatePowerResource (
543 ACPI_WALK_STATE *WalkState)
544 {
545 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
546 ACPI_STATUS Status;
547 ACPI_OPERAND_OBJECT *ObjDesc;
548
549
550 ACPI_FUNCTION_TRACE_PTR (ExCreatePowerResource, WalkState);
551
552
553 /* Create the power resource object */
554
555 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_POWER);
556 if (!ObjDesc)
557 {
558 return_ACPI_STATUS (AE_NO_MEMORY);
559 }
560
561 /* Initialize the power object from the operands */
562
563 ObjDesc->PowerResource.SystemLevel = (UINT8) Operand[1]->Integer.Value;
564 ObjDesc->PowerResource.ResourceOrder = (UINT16) Operand[2]->Integer.Value;
565
566 /* Install the power resource object in the parent Node */
567
568 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
569 ObjDesc, ACPI_TYPE_POWER);
570
571 /* Remove local reference to the object */
572
573 AcpiUtRemoveReference (ObjDesc);
574 return_ACPI_STATUS (Status);
575 }
576
577
578 /*******************************************************************************
579 *
580 * FUNCTION: AcpiExCreateMethod
581 *
582 * PARAMETERS: AmlStart - First byte of the method's AML
583 * AmlLength - AML byte count for this method
584 * WalkState - Current state
585 *
586 * RETURN: Status
587 *
588 * DESCRIPTION: Create a new method object
589 *
590 ******************************************************************************/
591
592 ACPI_STATUS
AcpiExCreateMethod(UINT8 * AmlStart,UINT32 AmlLength,ACPI_WALK_STATE * WalkState)593 AcpiExCreateMethod (
594 UINT8 *AmlStart,
595 UINT32 AmlLength,
596 ACPI_WALK_STATE *WalkState)
597 {
598 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0];
599 ACPI_OPERAND_OBJECT *ObjDesc;
600 ACPI_STATUS Status;
601 UINT8 MethodFlags;
602
603
604 ACPI_FUNCTION_TRACE_PTR (ExCreateMethod, WalkState);
605
606
607 /* Create a new method object */
608
609 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD);
610 if (!ObjDesc)
611 {
612 Status = AE_NO_MEMORY;
613 goto Exit;
614 }
615
616 /* Save the method's AML pointer and length */
617
618 ObjDesc->Method.AmlStart = AmlStart;
619 ObjDesc->Method.AmlLength = AmlLength;
620 ObjDesc->Method.Node = Operand[0];
621
622 /*
623 * Disassemble the method flags. Split off the ArgCount, Serialized
624 * flag, and SyncLevel for efficiency.
625 */
626 MethodFlags = (UINT8) Operand[1]->Integer.Value;
627 ObjDesc->Method.ParamCount = (UINT8)
628 (MethodFlags & AML_METHOD_ARG_COUNT);
629
630 /*
631 * Get the SyncLevel. If method is serialized, a mutex will be
632 * created for this method when it is parsed.
633 */
634 if (MethodFlags & AML_METHOD_SERIALIZED)
635 {
636 ObjDesc->Method.InfoFlags = ACPI_METHOD_SERIALIZED;
637
638 /*
639 * ACPI 1.0: SyncLevel = 0
640 * ACPI 2.0: SyncLevel = SyncLevel in method declaration
641 */
642 ObjDesc->Method.SyncLevel = (UINT8)
643 ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4);
644 }
645
646 /* Attach the new object to the method Node */
647
648 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) Operand[0],
649 ObjDesc, ACPI_TYPE_METHOD);
650
651 /* Remove local reference to the object */
652
653 AcpiUtRemoveReference (ObjDesc);
654
655 Exit:
656 /* Remove a reference to the operand */
657
658 AcpiUtRemoveReference (Operand[1]);
659 return_ACPI_STATUS (Status);
660 }
661