usr/src/uts/intel/io/acpica/namespace/nsprepkg.c

   1 /******************************************************************************
   2  *
   3  * Module Name: nsprepkg - Validation of package objects for predefined names
   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 #include "acpredef.h"
  48
  49
  50 #define _COMPONENT          ACPI_NAMESPACE
  51         ACPI_MODULE_NAME    ("nsprepkg")
  52
  53
  54 /* Local prototypes */
  55
  56 static ACPI_STATUS
  57 AcpiNsCheckPackageList (
  58     ACPI_EVALUATE_INFO          *Info,
  59     const ACPI_PREDEFINED_INFO  *Package,
  60     ACPI_OPERAND_OBJECT         **Elements,
  61     UINT32                      Count);
  62
  63 static ACPI_STATUS
  64 AcpiNsCheckPackageElements (
  65     ACPI_EVALUATE_INFO          *Info,
  66     ACPI_OPERAND_OBJECT         **Elements,
  67     UINT8                       Type1,
  68     UINT32                      Count1,
  69     UINT8                       Type2,
  70     UINT32                      Count2,
  71     UINT32                      StartIndex);
  72
  73 static ACPI_STATUS
  74 AcpiNsCustomPackage (
  75     ACPI_EVALUATE_INFO          *Info,
  76     ACPI_OPERAND_OBJECT         **Elements,
  77     UINT32                      Count);
  78
  79
  80 /*******************************************************************************
  81  *
  82  * FUNCTION:    AcpiNsCheckPackage
  83  *
  84  * PARAMETERS:  Info                - Method execution information block
  85  *              ReturnObjectPtr     - Pointer to the object returned from the
  86  *                                    evaluation of a method or object
  87  *
  88  * RETURN:      Status
  89  *
  90  * DESCRIPTION: Check a returned package object for the correct count and
  91  *              correct type of all sub-objects.
  92  *
  93  ******************************************************************************/
  94
  95 ACPI_STATUS
  96 AcpiNsCheckPackage (
  97     ACPI_EVALUATE_INFO          *Info,
  98     ACPI_OPERAND_OBJECT         **ReturnObjectPtr)
  99 {
 100     ACPI_OPERAND_OBJECT         *ReturnObject = *ReturnObjectPtr;
 101     const ACPI_PREDEFINED_INFO  *Package;
 102     ACPI_OPERAND_OBJECT         **Elements;
 103     ACPI_STATUS                 Status = AE_OK;
 104     UINT32                      ExpectedCount;
 105     UINT32                      Count;
 106     UINT32                      i;
 107
 108
 109     ACPI_FUNCTION_NAME (NsCheckPackage);
 110
 111
 112     /* The package info for this name is in the next table entry */
 113
 114     Package = Info->Predefined + 1;
 115
 116     ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
 117         "%s Validating return Package of Type %X, Count %X\n",
 118         Info->FullPathname, Package->RetInfo.Type,
 119         ReturnObject->Package.Count));
 120
 121     /*
 122      * For variable-length Packages, we can safely remove all embedded
 123      * and trailing NULL package elements
 124      */
 125     AcpiNsRemoveNullElements (Info, Package->RetInfo.Type, ReturnObject);
 126
 127     /* Extract package count and elements array */
 128
 129     Elements = ReturnObject->Package.Elements;
 130     Count = ReturnObject->Package.Count;
 131
 132     /*
 133      * Most packages must have at least one element. The only exception
 134      * is the variable-length package (ACPI_PTYPE1_VAR).
 135      */
 136     if (!Count)
 137     {
 138         if (Package->RetInfo.Type == ACPI_PTYPE1_VAR)
 139         {
 140             return (AE_OK);
 141         }
 142
 143         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 144             "Return Package has no elements (empty)"));
 145
 146         return (AE_AML_OPERAND_VALUE);
 147     }
 148
 149     /*
 150      * Decode the type of the expected package contents
 151      *
 152      * PTYPE1 packages contain no subpackages
 153      * PTYPE2 packages contain subpackages
 154      */
 155     switch (Package->RetInfo.Type)
 156     {
 157     case ACPI_PTYPE_CUSTOM:
 158
 159         Status = AcpiNsCustomPackage (Info, Elements, Count);
 160         break;
 161
 162     case ACPI_PTYPE1_FIXED:
 163         /*
 164          * The package count is fixed and there are no subpackages
 165          *
 166          * If package is too small, exit.
 167          * If package is larger than expected, issue warning but continue
 168          */
 169         ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 170         if (Count < ExpectedCount)
 171         {
 172             goto PackageTooSmall;
 173         }
 174         else if (Count > ExpectedCount)
 175         {
 176             ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
 177                 "%s: Return Package is larger than needed - "
 178                 "found %u, expected %u\n",
 179                 Info->FullPathname, Count, ExpectedCount));
 180         }
 181
 182         /* Validate all elements of the returned package */
 183
 184         Status = AcpiNsCheckPackageElements (Info, Elements,
 185             Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
 186             Package->RetInfo.ObjectType2, Package->RetInfo.Count2, 0);
 187         break;
 188
 189     case ACPI_PTYPE1_VAR:
 190         /*
 191          * The package count is variable, there are no subpackages, and all
 192          * elements must be of the same type
 193          */
 194         for (i = 0; i < Count; i++)
 195         {
 196             Status = AcpiNsCheckObjectType (Info, Elements,
 197                 Package->RetInfo.ObjectType1, i);
 198             if (ACPI_FAILURE (Status))
 199             {
 200                 return (Status);
 201             }
 202
 203             Elements++;
 204         }
 205         break;
 206
 207     case ACPI_PTYPE1_OPTION:
 208         /*
 209          * The package count is variable, there are no subpackages. There are
 210          * a fixed number of required elements, and a variable number of
 211          * optional elements.
 212          *
 213          * Check if package is at least as large as the minimum required
 214          */
 215         ExpectedCount = Package->RetInfo3.Count;
 216         if (Count < ExpectedCount)
 217         {
 218             goto PackageTooSmall;
 219         }
 220
 221         /* Variable number of sub-objects */
 222
 223         for (i = 0; i < Count; i++)
 224         {
 225             if (i < Package->RetInfo3.Count)
 226             {
 227                 /* These are the required package elements (0, 1, or 2) */
 228
 229                 Status = AcpiNsCheckObjectType (Info, Elements,
 230                     Package->RetInfo3.ObjectType[i], i);
 231                 if (ACPI_FAILURE (Status))
 232                 {
 233                     return (Status);
 234                 }
 235             }
 236             else
 237             {
 238                 /* These are the optional package elements */
 239
 240                 Status = AcpiNsCheckObjectType (Info, Elements,
 241                     Package->RetInfo3.TailObjectType, i);
 242                 if (ACPI_FAILURE (Status))
 243                 {
 244                     return (Status);
 245                 }
 246             }
 247
 248             Elements++;
 249         }
 250         break;
 251
 252     case ACPI_PTYPE2_REV_FIXED:
 253
 254         /* First element is the (Integer) revision */
 255
 256         Status = AcpiNsCheckObjectType (
 257             Info, Elements, ACPI_RTYPE_INTEGER, 0);
 258         if (ACPI_FAILURE (Status))
 259         {
 260             return (Status);
 261         }
 262
 263         Elements++;
 264         Count--;
 265
 266         /* Examine the subpackages */
 267
 268         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 269         break;
 270
 271     case ACPI_PTYPE2_PKG_COUNT:
 272
 273         /* First element is the (Integer) count of subpackages to follow */
 274
 275         Status = AcpiNsCheckObjectType (
 276             Info, Elements, ACPI_RTYPE_INTEGER, 0);
 277         if (ACPI_FAILURE (Status))
 278         {
 279             return (Status);
 280         }
 281
 282         /*
 283          * Count cannot be larger than the parent package length, but allow it
 284          * to be smaller. The >= accounts for the Integer above.
 285          */
 286         ExpectedCount = (UINT32) (*Elements)->Integer.Value;
 287         if (ExpectedCount >= Count)
 288         {
 289             goto PackageTooSmall;
 290         }
 291
 292         Count = ExpectedCount;
 293         Elements++;
 294
 295         /* Examine the subpackages */
 296
 297         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 298         break;
 299
 300     case ACPI_PTYPE2:
 301     case ACPI_PTYPE2_FIXED:
 302     case ACPI_PTYPE2_MIN:
 303     case ACPI_PTYPE2_COUNT:
 304     case ACPI_PTYPE2_FIX_VAR:
 305         /*
 306          * These types all return a single Package that consists of a
 307          * variable number of subpackages.
 308          *
 309          * First, ensure that the first element is a subpackage. If not,
 310          * the BIOS may have incorrectly returned the object as a single
 311          * package instead of a Package of Packages (a common error if
 312          * there is only one entry). We may be able to repair this by
 313          * wrapping the returned Package with a new outer Package.
 314          */
 315         if (*Elements && ((*Elements)->Common.Type != ACPI_TYPE_PACKAGE))
 316         {
 317             /* Create the new outer package and populate it */
 318
 319             Status = AcpiNsWrapWithPackage (
 320                 Info, ReturnObject, ReturnObjectPtr);
 321             if (ACPI_FAILURE (Status))
 322             {
 323                 return (Status);
 324             }
 325
 326             /* Update locals to point to the new package (of 1 element) */
 327
 328             ReturnObject = *ReturnObjectPtr;
 329             Elements = ReturnObject->Package.Elements;
 330             Count = 1;
 331         }
 332
 333         /* Examine the subpackages */
 334
 335         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 336         break;
 337
 338     case ACPI_PTYPE2_VAR_VAR:
 339         /*
 340          * Returns a variable list of packages, each with a variable list
 341          * of objects.
 342          */
 343         break;
 344
 345     case ACPI_PTYPE2_UUID_PAIR:
 346
 347         /* The package must contain pairs of (UUID + type) */
 348
 349         if (Count & 1)
 350         {
 351             ExpectedCount = Count + 1;
 352             goto PackageTooSmall;
 353         }
 354
 355         while (Count > 0)
 356         {
 357             Status = AcpiNsCheckObjectType(Info, Elements,
 358                 Package->RetInfo.ObjectType1, 0);
 359             if (ACPI_FAILURE(Status))
 360             {
 361                 return (Status);
 362             }
 363
 364             /* Validate length of the UUID buffer */
 365
 366             if ((*Elements)->Buffer.Length != 16)
 367             {
 368                 ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname,
 369                     Info->NodeFlags, "Invalid length for UUID Buffer"));
 370                 return (AE_AML_OPERAND_VALUE);
 371             }
 372
 373             Status = AcpiNsCheckObjectType(Info, Elements + 1,
 374                 Package->RetInfo.ObjectType2, 0);
 375             if (ACPI_FAILURE(Status))
 376             {
 377                 return (Status);
 378             }
 379
 380             Elements += 2;
 381             Count -= 2;
 382         }
 383         break;
 384
 385     default:
 386
 387         /* Should not get here if predefined info table is correct */
 388
 389         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 390             "Invalid internal return type in table entry: %X",
 391             Package->RetInfo.Type));
 392
 393         return (AE_AML_INTERNAL);
 394     }
 395
 396     return (Status);
 397
 398
 399 PackageTooSmall:
 400
 401     /* Error exit for the case with an incorrect package count */
 402
 403     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 404         "Return Package is too small - found %u elements, expected %u",
 405         Count, ExpectedCount));
 406
 407     return (AE_AML_OPERAND_VALUE);
 408 }
 409
 410
 411 /*******************************************************************************
 412  *
 413  * FUNCTION:    AcpiNsCheckPackageList
 414  *
 415  * PARAMETERS:  Info            - Method execution information block
 416  *              Package         - Pointer to package-specific info for method
 417  *              Elements        - Element list of parent package. All elements
 418  *                                of this list should be of type Package.
 419  *              Count           - Count of subpackages
 420  *
 421  * RETURN:      Status
 422  *
 423  * DESCRIPTION: Examine a list of subpackages
 424  *
 425  ******************************************************************************/
 426
 427 static ACPI_STATUS
 428 AcpiNsCheckPackageList (
 429     ACPI_EVALUATE_INFO          *Info,
 430     const ACPI_PREDEFINED_INFO  *Package,
 431     ACPI_OPERAND_OBJECT         **Elements,
 432     UINT32                      Count)
 433 {
 434     ACPI_OPERAND_OBJECT         *SubPackage;
 435     ACPI_OPERAND_OBJECT         **SubElements;
 436     ACPI_STATUS                 Status;
 437     UINT32                      ExpectedCount;
 438     UINT32                      i;
 439     UINT32                      j;
 440
 441
 442     /*
 443      * Validate each subpackage in the parent Package
 444      *
 445      * NOTE: assumes list of subpackages contains no NULL elements.
 446      * Any NULL elements should have been removed by earlier call
 447      * to AcpiNsRemoveNullElements.
 448      */
 449     for (i = 0; i < Count; i++)
 450     {
 451         SubPackage = *Elements;
 452         SubElements = SubPackage->Package.Elements;
 453         Info->ParentPackage = SubPackage;
 454
 455         /* Each sub-object must be of type Package */
 456
 457         Status = AcpiNsCheckObjectType (Info, &SubPackage,
 458             ACPI_RTYPE_PACKAGE, i);
 459         if (ACPI_FAILURE (Status))
 460         {
 461             return (Status);
 462         }
 463
 464         /* Examine the different types of expected subpackages */
 465
 466         Info->ParentPackage = SubPackage;
 467         switch (Package->RetInfo.Type)
 468         {
 469         case ACPI_PTYPE2:
 470         case ACPI_PTYPE2_PKG_COUNT:
 471         case ACPI_PTYPE2_REV_FIXED:
 472
 473             /* Each subpackage has a fixed number of elements */
 474
 475             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 476             if (SubPackage->Package.Count < ExpectedCount)
 477             {
 478                 goto PackageTooSmall;
 479             }
 480
 481             Status = AcpiNsCheckPackageElements (Info, SubElements,
 482                 Package->RetInfo.ObjectType1,
 483                 Package->RetInfo.Count1,
 484                 Package->RetInfo.ObjectType2,
 485                 Package->RetInfo.Count2, 0);
 486             if (ACPI_FAILURE (Status))
 487             {
 488                 return (Status);
 489             }
 490             break;
 491
 492         case ACPI_PTYPE2_FIX_VAR:
 493             /*
 494              * Each subpackage has a fixed number of elements and an
 495              * optional element
 496              */
 497             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 498             if (SubPackage->Package.Count < ExpectedCount)
 499             {
 500                 goto PackageTooSmall;
 501             }
 502
 503             Status = AcpiNsCheckPackageElements (Info, SubElements,
 504                 Package->RetInfo.ObjectType1,
 505                 Package->RetInfo.Count1,
 506                 Package->RetInfo.ObjectType2,
 507                 SubPackage->Package.Count - Package->RetInfo.Count1, 0);
 508             if (ACPI_FAILURE (Status))
 509             {
 510                 return (Status);
 511             }
 512             break;
 513
 514         case ACPI_PTYPE2_VAR_VAR:
 515             /*
 516              * Each subpackage has a fixed or variable number of elements
 517              */
 518             break;
 519
 520         case ACPI_PTYPE2_FIXED:
 521
 522             /* Each subpackage has a fixed length */
 523
 524             ExpectedCount = Package->RetInfo2.Count;
 525             if (SubPackage->Package.Count < ExpectedCount)
 526             {
 527                 goto PackageTooSmall;
 528             }
 529
 530             /* Check the type of each subpackage element */
 531
 532             for (j = 0; j < ExpectedCount; j++)
 533             {
 534                 Status = AcpiNsCheckObjectType (Info, &SubElements[j],
 535                     Package->RetInfo2.ObjectType[j], j);
 536                 if (ACPI_FAILURE (Status))
 537                 {
 538                     return (Status);
 539                 }
 540             }
 541             break;
 542
 543         case ACPI_PTYPE2_MIN:
 544
 545             /* Each subpackage has a variable but minimum length */
 546
 547             ExpectedCount = Package->RetInfo.Count1;
 548             if (SubPackage->Package.Count < ExpectedCount)
 549             {
 550                 goto PackageTooSmall;
 551             }
 552
 553             /* Check the type of each subpackage element */
 554
 555             Status = AcpiNsCheckPackageElements (Info, SubElements,
 556                 Package->RetInfo.ObjectType1,
 557                 SubPackage->Package.Count, 0, 0, 0);
 558             if (ACPI_FAILURE (Status))
 559             {
 560                 return (Status);
 561             }
 562             break;
 563
 564         case ACPI_PTYPE2_COUNT:
 565             /*
 566              * First element is the (Integer) count of elements, including
 567              * the count field (the ACPI name is NumElements)
 568              */
 569             Status = AcpiNsCheckObjectType (Info, SubElements,
 570                 ACPI_RTYPE_INTEGER, 0);
 571             if (ACPI_FAILURE (Status))
 572             {
 573                 return (Status);
 574             }
 575
 576             /*
 577              * Make sure package is large enough for the Count and is
 578              * is as large as the minimum size
 579              */
 580             ExpectedCount = (UINT32) (*SubElements)->Integer.Value;
 581             if (SubPackage->Package.Count < ExpectedCount)
 582             {
 583                 goto PackageTooSmall;
 584             }
 585
 586             if (SubPackage->Package.Count < Package->RetInfo.Count1)
 587             {
 588                 ExpectedCount = Package->RetInfo.Count1;
 589                 goto PackageTooSmall;
 590             }
 591
 592             if (ExpectedCount == 0)
 593             {
 594                 /*
 595                  * Either the NumEntries element was originally zero or it was
 596                  * a NULL element and repaired to an Integer of value zero.
 597                  * In either case, repair it by setting NumEntries to be the
 598                  * actual size of the subpackage.
 599                  */
 600                 ExpectedCount = SubPackage->Package.Count;
 601                 (*SubElements)->Integer.Value = ExpectedCount;
 602             }
 603
 604             /* Check the type of each subpackage element */
 605
 606             Status = AcpiNsCheckPackageElements (Info, (SubElements + 1),
 607                 Package->RetInfo.ObjectType1,
 608                 (ExpectedCount - 1), 0, 0, 1);
 609             if (ACPI_FAILURE (Status))
 610             {
 611                 return (Status);
 612             }
 613             break;
 614
 615         default: /* Should not get here, type was validated by caller */
 616
 617             return (AE_AML_INTERNAL);
 618         }
 619
 620         Elements++;
 621     }
 622
 623     return (AE_OK);
 624
 625
 626 PackageTooSmall:
 627
 628     /* The subpackage count was smaller than required */
 629
 630     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 631         "Return SubPackage[%u] is too small - found %u elements, expected %u",
 632         i, SubPackage->Package.Count, ExpectedCount));
 633
 634     return (AE_AML_OPERAND_VALUE);
 635 }
 636
 637
 638 /*******************************************************************************
 639  *
 640  * FUNCTION:    AcpiNsCustomPackage
 641  *
 642  * PARAMETERS:  Info                - Method execution information block
 643  *              Elements            - Pointer to the package elements array
 644  *              Count               - Element count for the package
 645  *
 646  * RETURN:      Status
 647  *
 648  * DESCRIPTION: Check a returned package object for the correct count and
 649  *              correct type of all sub-objects.
 650  *
 651  * NOTE: Currently used for the _BIX method only. When needed for two or more
 652  * methods, probably a detect/dispatch mechanism will be required.
 653  *
 654  ******************************************************************************/
 655
 656 static ACPI_STATUS
 657 AcpiNsCustomPackage (
 658     ACPI_EVALUATE_INFO          *Info,
 659     ACPI_OPERAND_OBJECT         **Elements,
 660     UINT32                      Count)
 661 {
 662     UINT32                      ExpectedCount;
 663     UINT32                      Version;
 664     ACPI_STATUS                 Status = AE_OK;
 665
 666
 667     ACPI_FUNCTION_NAME (NsCustomPackage);
 668
 669
 670     /* Get version number, must be Integer */
 671
 672     if ((*Elements)->Common.Type != ACPI_TYPE_INTEGER)
 673     {
 674         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 675             "Return Package has invalid object type for version number"));
 676         return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 677     }
 678
 679     Version = (UINT32) (*Elements)->Integer.Value;
 680     ExpectedCount = 21;         /* Version 1 */
 681
 682     if (Version == 0)
 683     {
 684         ExpectedCount = 20;     /* Version 0 */
 685     }
 686
 687     if (Count < ExpectedCount)
 688     {
 689         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 690             "Return Package is too small - found %u elements, expected %u",
 691             Count, ExpectedCount));
 692         return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
 693     }
 694     else if (Count > ExpectedCount)
 695     {
 696         ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
 697             "%s: Return Package is larger than needed - "
 698             "found %u, expected %u\n",
 699             Info->FullPathname, Count, ExpectedCount));
 700     }
 701
 702     /* Validate all elements of the returned package */
 703
 704     Status = AcpiNsCheckPackageElements (Info, Elements,
 705         ACPI_RTYPE_INTEGER, 16,
 706         ACPI_RTYPE_STRING, 4, 0);
 707     if (ACPI_FAILURE (Status))
 708     {
 709         return_ACPI_STATUS (Status);
 710     }
 711
 712     /* Version 1 has a single trailing integer */
 713
 714     if (Version > 0)
 715     {
 716         Status = AcpiNsCheckPackageElements (Info, Elements + 20,
 717             ACPI_RTYPE_INTEGER, 1, 0, 0, 20);
 718     }
 719
 720     return_ACPI_STATUS (Status);
 721 }
 722
 723
 724 /*******************************************************************************
 725  *
 726  * FUNCTION:    AcpiNsCheckPackageElements
 727  *
 728  * PARAMETERS:  Info            - Method execution information block
 729  *              Elements        - Pointer to the package elements array
 730  *              Type1           - Object type for first group
 731  *              Count1          - Count for first group
 732  *              Type2           - Object type for second group
 733  *              Count2          - Count for second group
 734  *              StartIndex      - Start of the first group of elements
 735  *
 736  * RETURN:      Status
 737  *
 738  * DESCRIPTION: Check that all elements of a package are of the correct object
 739  *              type. Supports up to two groups of different object types.
 740  *
 741  ******************************************************************************/
 742
 743 static ACPI_STATUS
 744 AcpiNsCheckPackageElements (
 745     ACPI_EVALUATE_INFO          *Info,
 746     ACPI_OPERAND_OBJECT         **Elements,
 747     UINT8                       Type1,
 748     UINT32                      Count1,
 749     UINT8                       Type2,
 750     UINT32                      Count2,
 751     UINT32                      StartIndex)
 752 {
 753     ACPI_OPERAND_OBJECT         **ThisElement = Elements;
 754     ACPI_STATUS                 Status;
 755     UINT32                      i;
 756
 757
 758     /*
 759      * Up to two groups of package elements are supported by the data
 760      * structure. All elements in each group must be of the same type.
 761      * The second group can have a count of zero.
 762      */
 763     for (i = 0; i < Count1; i++)
 764     {
 765         Status = AcpiNsCheckObjectType (Info, ThisElement,
 766             Type1, i + StartIndex);
 767         if (ACPI_FAILURE (Status))
 768         {
 769             return (Status);
 770         }
 771
 772         ThisElement++;
 773     }
 774
 775     for (i = 0; i < Count2; i++)
 776     {
 777         Status = AcpiNsCheckObjectType (Info, ThisElement,
 778             Type2, (i + Count1 + StartIndex));
 779         if (ACPI_FAILURE (Status))
 780         {
 781             return (Status);
 782         }
 783
 784         ThisElement++;
 785     }
 786
 787     return (AE_OK);
 788 }