usr/src/uts/intel/io/acpica/utilities/utobject.c

   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  *
  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 *
 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 *
 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 *
 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 *
 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
 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 *
 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
 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
 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
 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
 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
 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 }