xref: /titanic_41/usr/src/uts/intel/io/acpica/utilities/utobject.c (revision de5d74c22760a6d2cefd94d0e7f0fd87214fb71f)
1 /******************************************************************************
2  *
3  * Module Name: utobject - ACPI object create/delete/size/cache routines
4  *
5  *****************************************************************************/
6 
7 /*
8  * Copyright (C) 2000 - 2016, 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 (
111         ModuleName, LineNumber, ComponentId);
112     if (!Object)
113     {
114         return_PTR (NULL);
115     }
116 
117     switch (Type)
118     {
119     case ACPI_TYPE_REGION:
120     case ACPI_TYPE_BUFFER_FIELD:
121     case ACPI_TYPE_LOCAL_BANK_FIELD:
122 
123         /* These types require a secondary object */
124 
125         SecondObject = AcpiUtAllocateObjectDescDbg (
126             ModuleName, LineNumber, ComponentId);
127         if (!SecondObject)
128         {
129             AcpiUtDeleteObjectDesc (Object);
130             return_PTR (NULL);
131         }
132 
133         SecondObject->Common.Type = ACPI_TYPE_LOCAL_EXTRA;
134         SecondObject->Common.ReferenceCount = 1;
135 
136         /* Link the second object to the first */
137 
138         Object->Common.NextObject = SecondObject;
139         break;
140 
141     default:
142 
143         /* All others have no secondary object */
144         break;
145     }
146 
147     /* Save the object type in the object descriptor */
148 
149     Object->Common.Type = (UINT8) Type;
150 
151     /* Init the reference count */
152 
153     Object->Common.ReferenceCount = 1;
154 
155     /* Any per-type initialization should go here */
156 
157     return_PTR (Object);
158 }
159 
160 
161 /*******************************************************************************
162  *
163  * FUNCTION:    AcpiUtCreatePackageObject
164  *
165  * PARAMETERS:  Count               - Number of package elements
166  *
167  * RETURN:      Pointer to a new Package object, null on failure
168  *
169  * DESCRIPTION: Create a fully initialized package object
170  *
171  ******************************************************************************/
172 
173 ACPI_OPERAND_OBJECT *
AcpiUtCreatePackageObject(UINT32 Count)174 AcpiUtCreatePackageObject (
175     UINT32                  Count)
176 {
177     ACPI_OPERAND_OBJECT     *PackageDesc;
178     ACPI_OPERAND_OBJECT     **PackageElements;
179 
180 
181     ACPI_FUNCTION_TRACE_U32 (UtCreatePackageObject, Count);
182 
183 
184     /* Create a new Package object */
185 
186     PackageDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE);
187     if (!PackageDesc)
188     {
189         return_PTR (NULL);
190     }
191 
192     /*
193      * Create the element array. Count+1 allows the array to be null
194      * terminated.
195      */
196     PackageElements = ACPI_ALLOCATE_ZEROED (
197         ((ACPI_SIZE) Count + 1) * sizeof (void *));
198     if (!PackageElements)
199     {
200         ACPI_FREE (PackageDesc);
201         return_PTR (NULL);
202     }
203 
204     PackageDesc->Package.Count = Count;
205     PackageDesc->Package.Elements = PackageElements;
206     return_PTR (PackageDesc);
207 }
208 
209 
210 /*******************************************************************************
211  *
212  * FUNCTION:    AcpiUtCreateIntegerObject
213  *
214  * PARAMETERS:  InitialValue        - Initial value for the integer
215  *
216  * RETURN:      Pointer to a new Integer object, null on failure
217  *
218  * DESCRIPTION: Create an initialized integer object
219  *
220  ******************************************************************************/
221 
222 ACPI_OPERAND_OBJECT *
AcpiUtCreateIntegerObject(UINT64 InitialValue)223 AcpiUtCreateIntegerObject (
224     UINT64                  InitialValue)
225 {
226     ACPI_OPERAND_OBJECT     *IntegerDesc;
227 
228 
229     ACPI_FUNCTION_TRACE (UtCreateIntegerObject);
230 
231 
232     /* Create and initialize a new integer object */
233 
234     IntegerDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
235     if (!IntegerDesc)
236     {
237         return_PTR (NULL);
238     }
239 
240     IntegerDesc->Integer.Value = InitialValue;
241     return_PTR (IntegerDesc);
242 }
243 
244 
245 /*******************************************************************************
246  *
247  * FUNCTION:    AcpiUtCreateBufferObject
248  *
249  * PARAMETERS:  BufferSize             - Size of buffer to be created
250  *
251  * RETURN:      Pointer to a new Buffer object, null on failure
252  *
253  * DESCRIPTION: Create a fully initialized buffer object
254  *
255  ******************************************************************************/
256 
257 ACPI_OPERAND_OBJECT *
AcpiUtCreateBufferObject(ACPI_SIZE BufferSize)258 AcpiUtCreateBufferObject (
259     ACPI_SIZE               BufferSize)
260 {
261     ACPI_OPERAND_OBJECT     *BufferDesc;
262     UINT8                   *Buffer = NULL;
263 
264 
265     ACPI_FUNCTION_TRACE_U32 (UtCreateBufferObject, BufferSize);
266 
267 
268     /* Create a new Buffer object */
269 
270     BufferDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER);
271     if (!BufferDesc)
272     {
273         return_PTR (NULL);
274     }
275 
276     /* Create an actual buffer only if size > 0 */
277 
278     if (BufferSize > 0)
279     {
280         /* Allocate the actual buffer */
281 
282         Buffer = ACPI_ALLOCATE_ZEROED (BufferSize);
283         if (!Buffer)
284         {
285             ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
286                 (UINT32) BufferSize));
287 
288             AcpiUtRemoveReference (BufferDesc);
289             return_PTR (NULL);
290         }
291     }
292 
293     /* Complete buffer object initialization */
294 
295     BufferDesc->Buffer.Flags |= AOPOBJ_DATA_VALID;
296     BufferDesc->Buffer.Pointer = Buffer;
297     BufferDesc->Buffer.Length = (UINT32) BufferSize;
298 
299     /* Return the new buffer descriptor */
300 
301     return_PTR (BufferDesc);
302 }
303 
304 
305 /*******************************************************************************
306  *
307  * FUNCTION:    AcpiUtCreateStringObject
308  *
309  * PARAMETERS:  StringSize          - Size of string to be created. Does not
310  *                                    include NULL terminator, this is added
311  *                                    automatically.
312  *
313  * RETURN:      Pointer to a new String object
314  *
315  * DESCRIPTION: Create a fully initialized string object
316  *
317  ******************************************************************************/
318 
319 ACPI_OPERAND_OBJECT *
AcpiUtCreateStringObject(ACPI_SIZE StringSize)320 AcpiUtCreateStringObject (
321     ACPI_SIZE               StringSize)
322 {
323     ACPI_OPERAND_OBJECT     *StringDesc;
324     char                    *String;
325 
326 
327     ACPI_FUNCTION_TRACE_U32 (UtCreateStringObject, StringSize);
328 
329 
330     /* Create a new String object */
331 
332     StringDesc = AcpiUtCreateInternalObject (ACPI_TYPE_STRING);
333     if (!StringDesc)
334     {
335         return_PTR (NULL);
336     }
337 
338     /*
339      * Allocate the actual string buffer -- (Size + 1) for NULL terminator.
340      * NOTE: Zero-length strings are NULL terminated
341      */
342     String = ACPI_ALLOCATE_ZEROED (StringSize + 1);
343     if (!String)
344     {
345         ACPI_ERROR ((AE_INFO, "Could not allocate size %u",
346             (UINT32) StringSize));
347 
348         AcpiUtRemoveReference (StringDesc);
349         return_PTR (NULL);
350     }
351 
352     /* Complete string object initialization */
353 
354     StringDesc->String.Pointer = String;
355     StringDesc->String.Length = (UINT32) StringSize;
356 
357     /* Return the new string descriptor */
358 
359     return_PTR (StringDesc);
360 }
361 
362 
363 /*******************************************************************************
364  *
365  * FUNCTION:    AcpiUtValidInternalObject
366  *
367  * PARAMETERS:  Object              - Object to be validated
368  *
369  * RETURN:      TRUE if object is valid, FALSE otherwise
370  *
371  * DESCRIPTION: Validate a pointer to be of type ACPI_OPERAND_OBJECT
372  *
373  ******************************************************************************/
374 
375 BOOLEAN
AcpiUtValidInternalObject(void * Object)376 AcpiUtValidInternalObject (
377     void                    *Object)
378 {
379 
380     ACPI_FUNCTION_NAME (UtValidInternalObject);
381 
382 
383     /* Check for a null pointer */
384 
385     if (!Object)
386     {
387         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "**** Null Object Ptr\n"));
388         return (FALSE);
389     }
390 
391     /* Check the descriptor type field */
392 
393     switch (ACPI_GET_DESCRIPTOR_TYPE (Object))
394     {
395     case ACPI_DESC_TYPE_OPERAND:
396 
397         /* The object appears to be a valid ACPI_OPERAND_OBJECT */
398 
399         return (TRUE);
400 
401     default:
402 
403         ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
404             "%p is not an ACPI operand obj [%s]\n",
405             Object, AcpiUtGetDescriptorName (Object)));
406         break;
407     }
408 
409     return (FALSE);
410 }
411 
412 
413 /*******************************************************************************
414  *
415  * FUNCTION:    AcpiUtAllocateObjectDescDbg
416  *
417  * PARAMETERS:  ModuleName          - Caller's module name (for error output)
418  *              LineNumber          - Caller's line number (for error output)
419  *              ComponentId         - Caller's component ID (for error output)
420  *
421  * RETURN:      Pointer to newly allocated object descriptor. Null on error
422  *
423  * DESCRIPTION: Allocate a new object descriptor. Gracefully handle
424  *              error conditions.
425  *
426  ******************************************************************************/
427 
428 void *
AcpiUtAllocateObjectDescDbg(const char * ModuleName,UINT32 LineNumber,UINT32 ComponentId)429 AcpiUtAllocateObjectDescDbg (
430     const char              *ModuleName,
431     UINT32                  LineNumber,
432     UINT32                  ComponentId)
433 {
434     ACPI_OPERAND_OBJECT     *Object;
435 
436 
437     ACPI_FUNCTION_TRACE (UtAllocateObjectDescDbg);
438 
439 
440     Object = AcpiOsAcquireObject (AcpiGbl_OperandCache);
441     if (!Object)
442     {
443         ACPI_ERROR ((ModuleName, LineNumber,
444             "Could not allocate an object descriptor"));
445 
446         return_PTR (NULL);
447     }
448 
449     /* Mark the descriptor type */
450 
451     ACPI_SET_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_OPERAND);
452 
453     ACPI_DEBUG_PRINT ((ACPI_DB_ALLOCATIONS, "%p Size %X\n",
454         Object, (UINT32) sizeof (ACPI_OPERAND_OBJECT)));
455 
456     return_PTR (Object);
457 }
458 
459 
460 /*******************************************************************************
461  *
462  * FUNCTION:    AcpiUtDeleteObjectDesc
463  *
464  * PARAMETERS:  Object          - An Acpi internal object to be deleted
465  *
466  * RETURN:      None.
467  *
468  * DESCRIPTION: Free an ACPI object descriptor or add it to the object cache
469  *
470  ******************************************************************************/
471 
472 void
AcpiUtDeleteObjectDesc(ACPI_OPERAND_OBJECT * Object)473 AcpiUtDeleteObjectDesc (
474     ACPI_OPERAND_OBJECT     *Object)
475 {
476     ACPI_FUNCTION_TRACE_PTR (UtDeleteObjectDesc, Object);
477 
478 
479     /* Object must be of type ACPI_OPERAND_OBJECT */
480 
481     if (ACPI_GET_DESCRIPTOR_TYPE (Object) != ACPI_DESC_TYPE_OPERAND)
482     {
483         ACPI_ERROR ((AE_INFO,
484             "%p is not an ACPI Operand object [%s]", Object,
485             AcpiUtGetDescriptorName (Object)));
486         return_VOID;
487     }
488 
489     (void) AcpiOsReleaseObject (AcpiGbl_OperandCache, Object);
490     return_VOID;
491 }
492 
493 
494 /*******************************************************************************
495  *
496  * FUNCTION:    AcpiUtGetSimpleObjectSize
497  *
498  * PARAMETERS:  InternalObject     - An ACPI operand object
499  *              ObjLength          - Where the length is returned
500  *
501  * RETURN:      Status
502  *
503  * DESCRIPTION: This function is called to determine the space required to
504  *              contain a simple object for return to an external user.
505  *
506  *              The length includes the object structure plus any additional
507  *              needed space.
508  *
509  ******************************************************************************/
510 
511 static ACPI_STATUS
AcpiUtGetSimpleObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)512 AcpiUtGetSimpleObjectSize (
513     ACPI_OPERAND_OBJECT     *InternalObject,
514     ACPI_SIZE               *ObjLength)
515 {
516     ACPI_SIZE               Length;
517     ACPI_SIZE               Size;
518     ACPI_STATUS             Status = AE_OK;
519 
520 
521     ACPI_FUNCTION_TRACE_PTR (UtGetSimpleObjectSize, InternalObject);
522 
523 
524     /* Start with the length of the (external) Acpi object */
525 
526     Length = sizeof (ACPI_OBJECT);
527 
528     /* A NULL object is allowed, can be a legal uninitialized package element */
529 
530     if (!InternalObject)
531     {
532         /*
533          * Object is NULL, just return the length of ACPI_OBJECT
534          * (A NULL ACPI_OBJECT is an object of all zeroes.)
535          */
536         *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
537         return_ACPI_STATUS (AE_OK);
538     }
539 
540     /* A Namespace Node should never appear here */
541 
542     if (ACPI_GET_DESCRIPTOR_TYPE (InternalObject) == ACPI_DESC_TYPE_NAMED)
543     {
544         /* A namespace node should never get here */
545 
546         return_ACPI_STATUS (AE_AML_INTERNAL);
547     }
548 
549     /*
550      * The final length depends on the object type
551      * Strings and Buffers are packed right up against the parent object and
552      * must be accessed bytewise or there may be alignment problems on
553      * certain processors
554      */
555     switch (InternalObject->Common.Type)
556     {
557     case ACPI_TYPE_STRING:
558 
559         Length += (ACPI_SIZE) InternalObject->String.Length + 1;
560         break;
561 
562     case ACPI_TYPE_BUFFER:
563 
564         Length += (ACPI_SIZE) InternalObject->Buffer.Length;
565         break;
566 
567     case ACPI_TYPE_INTEGER:
568     case ACPI_TYPE_PROCESSOR:
569     case ACPI_TYPE_POWER:
570 
571         /* No extra data for these types */
572 
573         break;
574 
575     case ACPI_TYPE_LOCAL_REFERENCE:
576 
577         switch (InternalObject->Reference.Class)
578         {
579         case ACPI_REFCLASS_NAME:
580             /*
581              * Get the actual length of the full pathname to this object.
582              * The reference will be converted to the pathname to the object
583              */
584             Size = AcpiNsGetPathnameLength (InternalObject->Reference.Node);
585             if (!Size)
586             {
587                 return_ACPI_STATUS (AE_BAD_PARAMETER);
588             }
589 
590             Length += ACPI_ROUND_UP_TO_NATIVE_WORD (Size);
591             break;
592 
593         default:
594             /*
595              * No other reference opcodes are supported.
596              * Notably, Locals and Args are not supported, but this may be
597              * required eventually.
598              */
599             ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
600                 "unsupported Reference Class [%s] 0x%X in object %p",
601                 AcpiUtGetReferenceName (InternalObject),
602                 InternalObject->Reference.Class, InternalObject));
603             Status = AE_TYPE;
604             break;
605         }
606         break;
607 
608     default:
609 
610         ACPI_ERROR ((AE_INFO, "Cannot convert to external object - "
611             "unsupported type [%s] 0x%X in object %p",
612             AcpiUtGetObjectTypeName (InternalObject),
613             InternalObject->Common.Type, InternalObject));
614         Status = AE_TYPE;
615         break;
616     }
617 
618     /*
619      * Account for the space required by the object rounded up to the next
620      * multiple of the machine word size. This keeps each object aligned
621      * on a machine word boundary. (preventing alignment faults on some
622      * machines.)
623      */
624     *ObjLength = ACPI_ROUND_UP_TO_NATIVE_WORD (Length);
625     return_ACPI_STATUS (Status);
626 }
627 
628 
629 /*******************************************************************************
630  *
631  * FUNCTION:    AcpiUtGetElementLength
632  *
633  * PARAMETERS:  ACPI_PKG_CALLBACK
634  *
635  * RETURN:      Status
636  *
637  * DESCRIPTION: Get the length of one package element.
638  *
639  ******************************************************************************/
640 
641 static ACPI_STATUS
AcpiUtGetElementLength(UINT8 ObjectType,ACPI_OPERAND_OBJECT * SourceObject,ACPI_GENERIC_STATE * State,void * Context)642 AcpiUtGetElementLength (
643     UINT8                   ObjectType,
644     ACPI_OPERAND_OBJECT     *SourceObject,
645     ACPI_GENERIC_STATE      *State,
646     void                    *Context)
647 {
648     ACPI_STATUS             Status = AE_OK;
649     ACPI_PKG_INFO           *Info = (ACPI_PKG_INFO *) Context;
650     ACPI_SIZE               ObjectSpace;
651 
652 
653     switch (ObjectType)
654     {
655     case ACPI_COPY_TYPE_SIMPLE:
656         /*
657          * Simple object - just get the size (Null object/entry is handled
658          * here also) and sum it into the running package length
659          */
660         Status = AcpiUtGetSimpleObjectSize (SourceObject, &ObjectSpace);
661         if (ACPI_FAILURE (Status))
662         {
663             return (Status);
664         }
665 
666         Info->Length += ObjectSpace;
667         break;
668 
669     case ACPI_COPY_TYPE_PACKAGE:
670 
671         /* Package object - nothing much to do here, let the walk handle it */
672 
673         Info->NumPackages++;
674         State->Pkg.ThisTargetObj = NULL;
675         break;
676 
677     default:
678 
679         /* No other types allowed */
680 
681         return (AE_BAD_PARAMETER);
682     }
683 
684     return (Status);
685 }
686 
687 
688 /*******************************************************************************
689  *
690  * FUNCTION:    AcpiUtGetPackageObjectSize
691  *
692  * PARAMETERS:  InternalObject      - An ACPI internal object
693  *              ObjLength           - Where the length is returned
694  *
695  * RETURN:      Status
696  *
697  * DESCRIPTION: This function is called to determine the space required to
698  *              contain a package object for return to an external user.
699  *
700  *              This is moderately complex since a package contains other
701  *              objects including packages.
702  *
703  ******************************************************************************/
704 
705 static ACPI_STATUS
AcpiUtGetPackageObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)706 AcpiUtGetPackageObjectSize (
707     ACPI_OPERAND_OBJECT     *InternalObject,
708     ACPI_SIZE               *ObjLength)
709 {
710     ACPI_STATUS             Status;
711     ACPI_PKG_INFO           Info;
712 
713 
714     ACPI_FUNCTION_TRACE_PTR (UtGetPackageObjectSize, InternalObject);
715 
716 
717     Info.Length = 0;
718     Info.ObjectSpace = 0;
719     Info.NumPackages = 1;
720 
721     Status = AcpiUtWalkPackageTree (
722         InternalObject, NULL, AcpiUtGetElementLength, &Info);
723     if (ACPI_FAILURE (Status))
724     {
725         return_ACPI_STATUS (Status);
726     }
727 
728     /*
729      * We have handled all of the objects in all levels of the package.
730      * just add the length of the package objects themselves.
731      * Round up to the next machine word.
732      */
733     Info.Length += ACPI_ROUND_UP_TO_NATIVE_WORD (
734         sizeof (ACPI_OBJECT)) * (ACPI_SIZE) Info.NumPackages;
735 
736     /* Return the total package length */
737 
738     *ObjLength = Info.Length;
739     return_ACPI_STATUS (Status);
740 }
741 
742 
743 /*******************************************************************************
744  *
745  * FUNCTION:    AcpiUtGetObjectSize
746  *
747  * PARAMETERS:  InternalObject      - An ACPI internal object
748  *              ObjLength           - Where the length will be returned
749  *
750  * RETURN:      Status
751  *
752  * DESCRIPTION: This function is called to determine the space required to
753  *              contain an object for return to an API user.
754  *
755  ******************************************************************************/
756 
757 ACPI_STATUS
AcpiUtGetObjectSize(ACPI_OPERAND_OBJECT * InternalObject,ACPI_SIZE * ObjLength)758 AcpiUtGetObjectSize (
759     ACPI_OPERAND_OBJECT     *InternalObject,
760     ACPI_SIZE               *ObjLength)
761 {
762     ACPI_STATUS             Status;
763 
764 
765     ACPI_FUNCTION_ENTRY ();
766 
767 
768     if ((ACPI_GET_DESCRIPTOR_TYPE (InternalObject) ==
769             ACPI_DESC_TYPE_OPERAND) &&
770         (InternalObject->Common.Type == ACPI_TYPE_PACKAGE))
771     {
772         Status = AcpiUtGetPackageObjectSize (InternalObject, ObjLength);
773     }
774     else
775     {
776         Status = AcpiUtGetSimpleObjectSize (InternalObject, ObjLength);
777     }
778 
779     return (Status);
780 }
781