1 /******************************************************************************
2 *
3 * Module Name: utobject - ACPI object create/delete/size/cache routines
4 *
5 *****************************************************************************/
6
7 /*
8 * Copyright (C) 2000 - 2014, Intel Corp.
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without
12 * modification, are permitted provided that the following conditions
13 * are met:
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions, and the following disclaimer,
16 * without modification.
17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
18 * substantially similar to the "NO WARRANTY" disclaimer below
19 * ("Disclaimer") and any redistribution must be conditioned upon
20 * including a substantially similar Disclaimer requirement for further
21 * binary redistribution.
22 * 3. Neither the names of the above-listed copyright holders nor the names
23 * of any contributors may be used to endorse or promote products derived
24 * from this software without specific prior written permission.
25 *
26 * Alternatively, this software may be distributed under the terms of the
27 * GNU General Public License ("GPL") version 2 as published by the Free
28 * Software Foundation.
29 *
30 * NO WARRANTY
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
41 * POSSIBILITY OF SUCH DAMAGES.
42 */
43
44 #include "acpi.h"
45 #include "accommon.h"
46 #include "acnamesp.h"
47
48
49 #define _COMPONENT ACPI_UTILITIES
50 ACPI_MODULE_NAME ("utobject")
51
52 /* Local prototypes */
53
54 static ACPI_STATUS
55 AcpiUtGetSimpleObjectSize (
56 ACPI_OPERAND_OBJECT *Obj,
57 ACPI_SIZE *ObjLength);
58
59 static ACPI_STATUS
60 AcpiUtGetPackageObjectSize (
61 ACPI_OPERAND_OBJECT *Obj,
62 ACPI_SIZE *ObjLength);
63
64 static ACPI_STATUS
65 AcpiUtGetElementLength (
66 UINT8 ObjectType,
67 ACPI_OPERAND_OBJECT *SourceObject,
68 ACPI_GENERIC_STATE *State,
69 void *Context);
70
71
72 /*******************************************************************************
73 *
74 * FUNCTION: AcpiUtCreateInternalObjectDbg
75 *
76 * PARAMETERS: ModuleName - Source file name of caller
77 * LineNumber - Line number of caller
78 * ComponentId - Component type of caller
79 * Type - ACPI Type of the new object
80 *
81 * RETURN: A new internal object, null on failure
82 *
83 * DESCRIPTION: Create and initialize a new internal object.
84 *
85 * NOTE: We always allocate the worst-case object descriptor because
86 * these objects are cached, and we want them to be
87 * one-size-satisifies-any-request. This in itself may not be
88 * the most memory efficient, but the efficiency of the object
89 * cache should more than make up for this!
90 *
91 ******************************************************************************/
92
93 ACPI_OPERAND_OBJECT *
AcpiUtCreateInternalObjectDbg(const char * ModuleName,UINT32 LineNumber,UINT32 ComponentId,ACPI_OBJECT_TYPE Type)94 AcpiUtCreateInternalObjectDbg (
95 const char *ModuleName,
96 UINT32 LineNumber,
97 UINT32 ComponentId,
98 ACPI_OBJECT_TYPE Type)
99 {
100 ACPI_OPERAND_OBJECT *Object;
101 ACPI_OPERAND_OBJECT *SecondObject;
102
103
104 ACPI_FUNCTION_TRACE_STR (UtCreateInternalObjectDbg,
105 AcpiUtGetTypeName (Type));
106
107
108 /* Allocate the raw object descriptor */
109
110 Object = AcpiUtAllocateObjectDescDbg (ModuleName, LineNumber, ComponentId);
111 if (!Object)
112 {
113 return_PTR (NULL);
114 }
115
116 switch (Type)
117 {
118 case ACPI_TYPE_REGION:
119 case ACPI_TYPE_BUFFER_FIELD:
120 case ACPI_TYPE_LOCAL_BANK_FIELD:
121
122 /* These types require a secondary object */
123
124 SecondObject = AcpiUtAllocateObjectDescDbg (ModuleName,
125 LineNumber, ComponentId);
126 if (!SecondObject)
127 {
128 AcpiUtDeleteObjectDesc (Object);
129 return_PTR (NULL);
130 }
131
132 SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
133 SecondObject->Common.ReferenceCount = 1;
134
135 /* Link the second object to the first */
136
137 Object->Common.NextObject = SecondObject;
138 break;
139
140 default:
141
142 /* All others have no secondary object */
143 break;
144 }
145
146 /* Save the object type in the object descriptor */
147
148 Object->Common.Type = (UINT8) Type;
149
150 /* Init the reference count */
151
152 Object->Common.ReferenceCount = 1;
153
154 /* Any per-type initialization should go here */
155
156 return_PTR (Object);
157 }
158
159
160 /*******************************************************************************
161 *
162 * FUNCTION: AcpiUtCreatePackageObject
163 *
164 * PARAMETERS: Count - Number of package elements
165 *
166 * RETURN: Pointer to a new Package object, null on failure
167 *
168 * DESCRIPTION: Create a fully initialized package object
169 *
170 ******************************************************************************/
171
172 ACPI_OPERAND_OBJECT *
AcpiUtCreatePackageObject(UINT32 Count)173 AcpiUtCreatePackageObject (
174 UINT32 Count)
175 {
176 ACPI_OPERAND_OBJECT *PackageDesc;
177 ACPI_OPERAND_OBJECT **PackageElements;
178
179
180 ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
181
182
183 /* Create a new Package object */
184
185 PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
186 if (!PackageDesc)
187 {
188 return_PTR (NULL);
189 }
190
191 /*
192 * Create the element array. Count+1 allows the array to be null
193 * terminated.
194 */
195 PackageElements = ACPI_ALLOCATE_ZEROED (
196 ((ACPI_SIZE) Count + 1) * sizeof (void *));
197 if (!PackageElements)
198 {
199 ACPI_FREE (PackageDesc);
200 return_PTR (NULL);
201 }
202
203 PackageDesc->Package.Count = Count;
204 PackageDesc->Package.Elements = PackageElements;
205 return_PTR (PackageDesc);
206 }
207
208
209 /*******************************************************************************
210 *
211 * FUNCTION: AcpiUtCreateIntegerObject
212 *
213 * PARAMETERS: InitialValue - Initial value for the integer
214 *
215 * RETURN: Pointer to a new Integer object, null on failure
216 *
217 * DESCRIPTION: Create an initialized integer object
218 *
219 ******************************************************************************/
220
221 ACPI_OPERAND_OBJECT *
AcpiUtCreateIntegerObject(UINT64 InitialValue)222 AcpiUtCreateIntegerObject (
223 UINT64 InitialValue)
224 {
225 ACPI_OPERAND_OBJECT *IntegerDesc;
226
227
228 ACPI_FUNCTION_TRACE (UtCreateIntegerObject);
229
230
231 /* Create and initialize a new integer object */
232
233 IntegerDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
234 if (!IntegerDesc)
235 {
236 return_PTR (NULL);
237 }
238
239 IntegerDesc->Integer.Value = InitialValue;
240 return_PTR (IntegerDesc);
241 }
242
243
244 /*******************************************************************************
245 *
246 * FUNCTION: AcpiUtCreateBufferObject
247 *
248 * PARAMETERS: BufferSize - Size of buffer to be created
249 *
250 * RETURN: Pointer to a new Buffer object, null on failure
251 *
252 * DESCRIPTION: Create a fully initialized buffer object
253 *
254 ******************************************************************************/
255
256 ACPI_OPERAND_OBJECT *
AcpiUtCreateBufferObject(ACPI_SIZE BufferSize)257 AcpiUtCreateBufferObject (
258 ACPI_SIZE BufferSize)
259 {
260 ACPI_OPERAND_OBJECT *BufferDesc;
261 UINT8 *Buffer = NULL;
262
263
264 ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
265
266
267 /* Create a new Buffer object */
268
269 BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
270 if (!BufferDesc)
271 {
272 return_PTR (NULL);
273 }
274
275 /* Create an actual buffer only if size > 0 */
276
277 if (BufferSize > 0)
278 {
279 /* Allocate the actual buffer */
280
281 Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
282 if (!Buffer)
283 {
284 ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
285 (UINT32) BufferSize));
286 AcpiUtRemoveReference (BufferDesc);
287 return_PTR (NULL);
288 }
289 }
290
291 /* Complete buffer object initialization */
292
293 BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
294 BufferDesc->Buffer.Pointer = Buffer;
295 BufferDesc->Buffer.Length = (UINT32) BufferSize;
296
297 /* Return the new buffer descriptor */
298
299 return_PTR (BufferDesc);
300 }
301
302
303 /*******************************************************************************
304 *
305 * FUNCTION: AcpiUtCreateStringObject
306 *
307 * PARAMETERS: StringSize - Size of string to be created. Does not
308 * include NULL terminator, this is added
309 * automatically.
310 *
311 * RETURN: Pointer to a new String object
312 *
313 * DESCRIPTION: Create a fully initialized string object
314 *
315 ******************************************************************************/
316
317 ACPI_OPERAND_OBJECT *
AcpiUtCreateStringObject(ACPI_SIZE StringSize)318 AcpiUtCreateStringObject (
319 ACPI_SIZE StringSize)
320 {
321 ACPI_OPERAND_OBJECT *StringDesc;
322 char *String;
323
324
325 ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
326
327
328 /* Create a new String object */
329
330 StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
331 if (!StringDesc)
332 {
333 return_PTR (NULL);
334 }
335
336 /*
337 * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
338 * NOTE: Zero-length strings are NULL terminated
339 */
340 String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
341 if (!String)
342 {
343 ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
344 (UINT32) StringSize));
345 AcpiUtRemoveReference (StringDesc);
346 return_PTR (NULL);
347 }
348
349 /* Complete string object initialization */
350
351 StringDesc->String.Pointer = String;
352 StringDesc->String.Length = (UINT32) StringSize;
353
354 /* Return the new string descriptor */
355
356 return_PTR (StringDesc);
357 }
358
359
360 /*******************************************************************************
361 *
362 * FUNCTION: AcpiUtValidInternalObject
363 *
364 * PARAMETERS: Object - Object to be validated
365 *
366 * RETURN: TRUE if object is valid, FALSE otherwise
367 *
368 * DESCRIPTION: Validate a pointer to be of type ACPI_OPERAND_OBJECT
369 *
370 ******************************************************************************/
371
372 BOOLEAN
AcpiUtValidInternalObject(void * Object)373 AcpiUtValidInternalObject (
374 void *Object)
375 {
376
377 ACPI_FUNCTION_NAME (UtValidInternalObject);
378
379
380 /* Check for a null pointer */
381
382 if (!Object)
383 {
384 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
385 return (FALSE);
386 }
387
388 /* Check the descriptor type field */
389
390 switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
391 {
392 case ACPI_DESC_TYPE_OPERAND:
393
394 /* The object appears to be a valid ACPI_OPERAND_OBJECT */
395
396 return (TRUE);
397
398 default:
399
400 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
401 "%p is not an ACPI operand obj [%s]\n",
402 Object, AcpiUtGetDescriptorName (Object)));
403 break;
404 }
405
406 return (FALSE);
407 }
408
409
410 /*******************************************************************************
411 *
412 * FUNCTION: AcpiUtAllocateObjectDescDbg
413 *
414 * PARAMETERS: ModuleName - Caller's module name (for error output)
415 * LineNumber - Caller's line number (for error output)
416 * ComponentId - Caller's component ID (for error output)
417 *
418 * RETURN: Pointer to newly allocated object descriptor. Null on error
419 *
420 * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
421 * error conditions.
422 *
423 ******************************************************************************/
424
425 void *
AcpiUtAllocateObjectDescDbg(const char * ModuleName,UINT32 LineNumber,UINT32 ComponentId)426 AcpiUtAllocateObjectDescDbg (
427 const char *ModuleName,
428 UINT32 LineNumber,
429 UINT32 ComponentId)
430 {
431 ACPI_OPERAND_OBJECT *Object;
432
433
434 ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
435
436
437 Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
438 if (!Object)
439 {
440 ACPI_ERROR ((ModuleName, LineNumber,
441 "Could not allocate an object descriptor"));
442
443 return_PTR (NULL);
444 }
445
446 /* Mark the descriptor type */
447
448 ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
449
450 ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
451 Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
452
453 return_PTR (Object);
454 }
455
456
457 /*******************************************************************************
458 *
459 * FUNCTION: AcpiUtDeleteObjectDesc
460 *
461 * PARAMETERS: Object - An Acpi internal object to be deleted
462 *
463 * RETURN: None.
464 *
465 * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
466 *
467 ******************************************************************************/
468
469 void
AcpiUtDeleteObjectDesc(ACPI_OPERAND_OBJECT * Object)470 AcpiUtDeleteObjectDesc (
471 ACPI_OPERAND_OBJECT *Object)
472 {
473 ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
474
475
476 /* Object must be of type ACPI_OPERAND_OBJECT */
477
478 if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
479 {
480 ACPI_ERROR ((AE_INFO,
481 "%p is not an ACPI Operand object [%s]", Object,
482 AcpiUtGetDescriptorName (Object)));
483 return_VOID;
484 }
485
486 (void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
487 return_VOID;
488 }
489
490
491 /*******************************************************************************
492 *
493 * FUNCTION: AcpiUtGetSimpleObjectSize
494 *
495 * PARAMETERS: InternalObject - An ACPI operand object
496 * ObjLength - Where the length is returned
497 *
498 * RETURN: Status
499 *
500 * DESCRIPTION: This function is called to determine the space required to
501 * contain a simple object for return to an external user.
502 *
503 * The length includes the object structure plus any additional
504 * needed space.
505 *
506 ******************************************************************************/
507
508 static ACPI_STATUS
AcpiUtGetSimpleObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)509 AcpiUtGetSimpleObjectSize (
510 ACPI_OPERAND_OBJECT *InternalObject,
511 ACPI_SIZE *ObjLength)
512 {
513 ACPI_SIZE Length;
514 ACPI_SIZE Size;
515 ACPI_STATUS Status = AE_OK;
516
517
518 ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
519
520
521 /* Start with the length of the (external) Acpi object */
522
523 Length = sizeof (ACPI_OBJECT);
524
525 /* A NULL object is allowed, can be a legal uninitialized package element */
526
527 if (!InternalObject)
528 {
529 /*
530 * Object is NULL, just return the length of ACPI_OBJECT
531 * (A NULL ACPI_OBJECT is an object of all zeroes.)
532 */
533 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
534 return_ACPI_STATUS (AE_OK);
535 }
536
537 /* A Namespace Node should never appear here */
538
539 if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
540 {
541 /* A namespace node should never get here */
542
543 return_ACPI_STATUS (AE_AML_INTERNAL);
544 }
545
546 /*
547 * The final length depends on the object type
548 * Strings and Buffers are packed right up against the parent object and
549 * must be accessed bytewise or there may be alignment problems on
550 * certain processors
551 */
552 switch (InternalObject->Common.Type)
553 {
554 case ACPI_TYPE_STRING:
555
556 Length += (ACPI_SIZE) InternalObject->String.Length + 1;
557 break;
558
559 case ACPI_TYPE_BUFFER:
560
561 Length += (ACPI_SIZE) InternalObject->Buffer.Length;
562 break;
563
564 case ACPI_TYPE_INTEGER:
565 case ACPI_TYPE_PROCESSOR:
566 case ACPI_TYPE_POWER:
567
568 /* No extra data for these types */
569
570 break;
571
572 case ACPI_TYPE_LOCAL_REFERENCE:
573
574 switch (InternalObject->Reference.Class)
575 {
576 case ACPI_REFCLASS_NAME:
577 /*
578 * Get the actual length of the full pathname to this object.
579 * The reference will be converted to the pathname to the object
580 */
581 Size = AcpiNsGetPathnameLength (InternalObject->Reference.Node);
582 if (!Size)
583 {
584 return_ACPI_STATUS (AE_BAD_PARAMETER);
585 }
586
587 Length += ACPI_ROUND_UP_TO_NATIVE_WORD (Size);
588 break;
589
590 default:
591 /*
592 * No other reference opcodes are supported.
593 * Notably, Locals and Args are not supported, but this may be
594 * required eventually.
595 */
596 ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
597 "unsupported Reference Class [%s] 0x%X in object %p",
598 AcpiUtGetReferenceName (InternalObject),
599 InternalObject->Reference.Class, InternalObject));
600 Status = AE_TYPE;
601 break;
602 }
603 break;
604
605 default:
606
607 ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
608 "unsupported type [%s] 0x%X in object %p",
609 AcpiUtGetObjectTypeName (InternalObject),
610 InternalObject->Common.Type, InternalObject));
611 Status = AE_TYPE;
612 break;
613 }
614
615 /*
616 * Account for the space required by the object rounded up to the next
617 * multiple of the machine word size. This keeps each object aligned
618 * on a machine word boundary. (preventing alignment faults on some
619 * machines.)
620 */
621 *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
622 return_ACPI_STATUS (Status);
623 }
624
625
626 /*******************************************************************************
627 *
628 * FUNCTION: AcpiUtGetElementLength
629 *
630 * PARAMETERS: ACPI_PKG_CALLBACK
631 *
632 * RETURN: Status
633 *
634 * DESCRIPTION: Get the length of one package element.
635 *
636 ******************************************************************************/
637
638 static ACPI_STATUS
AcpiUtGetElementLength(UINT8 ObjectType,ACPI_OPERAND_OBJECT * SourceObject,ACPI_GENERIC_STATE * State,void * Context)639 AcpiUtGetElementLength (
640 UINT8 ObjectType,
641 ACPI_OPERAND_OBJECT *SourceObject,
642 ACPI_GENERIC_STATE *State,
643 void *Context)
644 {
645 ACPI_STATUS Status = AE_OK;
646 ACPI_PKG_INFO *Info = (ACPI_PKG_INFO *) Context;
647 ACPI_SIZE ObjectSpace;
648
649
650 switch (ObjectType)
651 {
652 case ACPI_COPY_TYPE_SIMPLE:
653 /*
654 * Simple object - just get the size (Null object/entry is handled
655 * here also) and sum it into the running package length
656 */
657 Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
658 if (ACPI_FAILURE (Status))
659 {
660 return (Status);
661 }
662
663 Info->Length += ObjectSpace;
664 break;
665
666 case ACPI_COPY_TYPE_PACKAGE:
667
668 /* Package object - nothing much to do here, let the walk handle it */
669
670 Info->NumPackages++;
671 State->Pkg.ThisTargetObj = NULL;
672 break;
673
674 default:
675
676 /* No other types allowed */
677
678 return (AE_BAD_PARAMETER);
679 }
680
681 return (Status);
682 }
683
684
685 /*******************************************************************************
686 *
687 * FUNCTION: AcpiUtGetPackageObjectSize
688 *
689 * PARAMETERS: InternalObject - An ACPI internal object
690 * ObjLength - Where the length is returned
691 *
692 * RETURN: Status
693 *
694 * DESCRIPTION: This function is called to determine the space required to
695 * contain a package object for return to an external user.
696 *
697 * This is moderately complex since a package contains other
698 * objects including packages.
699 *
700 ******************************************************************************/
701
702 static ACPI_STATUS
AcpiUtGetPackageObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)703 AcpiUtGetPackageObjectSize (
704 ACPI_OPERAND_OBJECT *InternalObject,
705 ACPI_SIZE *ObjLength)
706 {
707 ACPI_STATUS Status;
708 ACPI_PKG_INFO Info;
709
710
711 ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
712
713
714 Info.Length = 0;
715 Info.ObjectSpace = 0;
716 Info.NumPackages = 1;
717
718 Status = AcpiUtWalkPackageTree (InternalObject, NULL,
719 AcpiUtGetElementLength, &Info);
720 if (ACPI_FAILURE (Status))
721 {
722 return_ACPI_STATUS (Status);
723 }
724
725 /*
726 * We have handled all of the objects in all levels of the package.
727 * just add the length of the package objects themselves.
728 * Round up to the next machine word.
729 */
730 Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (sizeof (ACPI_OBJECT)) *
731 (ACPI_SIZE) Info.NumPackages;
732
733 /* Return the total package length */
734
735 *ObjLength = Info.Length;
736 return_ACPI_STATUS (Status);
737 }
738
739
740 /*******************************************************************************
741 *
742 * FUNCTION: AcpiUtGetObjectSize
743 *
744 * PARAMETERS: InternalObject - An ACPI internal object
745 * ObjLength - Where the length will be returned
746 *
747 * RETURN: Status
748 *
749 * DESCRIPTION: This function is called to determine the space required to
750 * contain an object for return to an API user.
751 *
752 ******************************************************************************/
753
754 ACPI_STATUS
AcpiUtGetObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)755 AcpiUtGetObjectSize (
756 ACPI_OPERAND_OBJECT *InternalObject,
757 ACPI_SIZE *ObjLength)
758 {
759 ACPI_STATUS Status;
760
761
762 ACPI_FUNCTION_ENTRY ();
763
764
765 if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_OPERAND) &&
766 (InternalObject->Common.Type == ACPI_TYPE_PACKAGE))
767 {
768 Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
769 }
770 else
771 {
772 Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);
773 }
774
775 return (Status);
776 }
777