drivers/bus/acpi/acpica/namespace/nsprepkg.c

   1 /******************************************************************************
   2  *
   3  * Module Name: nsprepkg - Validation of package objects for predefined names
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2014, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  16  * 2.1. This is your license from Intel Corp. under its intellectual property
  17  * rights. You may have additional license terms from the party that provided
  18  * you this software, covering your right to use that party's intellectual
  19  * property rights.
  20  *
  21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22  * copy of the source code appearing in this file ("Covered Code") an
  23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25  * make derivatives, distribute, use and display any portion of the Covered
  26  * Code in any form, with the right to sublicense such rights; and
  27  *
  28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29  * license (with the right to sublicense), under only those claims of Intel
  30  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31  * offer to sell, and import the Covered Code and derivative works thereof
  32  * solely to the minimum extent necessary to exercise the above copyright
  33  * license, and in no event shall the patent license extend to any additions
  34  * to or modifications of the Original Intel Code. No other license or right
  35  * is granted directly or by implication, estoppel or otherwise;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43  * Redistribution of source code of any substantial portion of the Covered
  44  * Code or modification with rights to further distribute source must include
  45  * the above Copyright Notice, the above License, this list of Conditions,
  46  * and the following Disclaimer and Export Compliance provision. In addition,
  47  * Licensee must cause all Covered Code to which Licensee contributes to
  48  * contain a file documenting the changes Licensee made to create that Covered
  49  * Code and the date of any change. Licensee must include in that file the
  50  * documentation of any changes made by any predecessor Licensee. Licensee
  51  * must include a prominent statement that the modification is derived,
  52  * directly or indirectly, from Original Intel Code.
  53  *
  54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55  * Redistribution of source code of any substantial portion of the Covered
  56  * Code or modification without rights to further distribute source must
  57  * include the following Disclaimer and Export Compliance provision in the
  58  * documentation and/or other materials provided with distribution. In
  59  * addition, Licensee may not authorize further sublicense of source of any
  60  * portion of the Covered Code, and must include terms to the effect that the
  61  * license from Licensee to its licensee is limited to the intellectual
  62  * property embodied in the software Licensee provides to its licensee, and
  63  * not to intellectual property embodied in modifications its licensee may
  64  * make.
  65  *
  66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67  * substantial portion of the Covered Code or modification must reproduce the
  68  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69  * provision in the documentation and/or other materials provided with the
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77  * other dealings in products derived from or relating to the Covered Code
  78  * without prior written authorization from Intel.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83  * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
  85  * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
  86  * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
  87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  88  * PARTICULAR PURPOSE.
  89  *
  90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
  96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  97  * LIMITED REMEDY.
  98  *
  99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 100  * software or system incorporating such software without first obtaining any
 101  * required license or other approval from the U. S. Department of Commerce or
 102  * any other agency or department of the United States Government. In the
 103  * event Licensee exports any such software from the United States or
 104  * re-exports any such software from a foreign destination, Licensee shall
 105  * ensure that the distribution and export/re-export of the software is in
 106  * compliance with all laws, regulations, orders, or other restrictions of the
 107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 108  * any of its subsidiaries will export/re-export any technical data, process,
 109  * software, or service, directly or indirectly, to any country for which the
 110  * United States government or any agency thereof requires an export license,
 111  * other governmental approval, or letter of assurance, without first obtaining
 112  * such license, approval or letter.
 113  *
 114  *****************************************************************************/
 115
 116 #include "acpi.h"
 117 #include "accommon.h"
 118 #include "acnamesp.h"
 119 #include "acpredef.h"
 120
 121
 122 #define _COMPONENT          ACPI_NAMESPACE
 123         ACPI_MODULE_NAME    ("nsprepkg")
 124
 125
 126 /* Local prototypes */
 127
 128 static ACPI_STATUS
 129 AcpiNsCheckPackageList (
 130     ACPI_EVALUATE_INFO          *Info,
 131     const ACPI_PREDEFINED_INFO  *Package,
 132     ACPI_OPERAND_OBJECT         **Elements,
 133     UINT32                      Count);
 134
 135 static ACPI_STATUS
 136 AcpiNsCheckPackageElements (
 137     ACPI_EVALUATE_INFO          *Info,
 138     ACPI_OPERAND_OBJECT         **Elements,
 139     UINT8                       Type1,
 140     UINT32                      Count1,
 141     UINT8                       Type2,
 142     UINT32                      Count2,
 143     UINT32                      StartIndex);
 144
 145
 146 /*******************************************************************************
 147  *
 148  * FUNCTION:    AcpiNsCheckPackage
 149  *
 150  * PARAMETERS:  Info                - Method execution information block
 151  *              ReturnObjectPtr     - Pointer to the object returned from the
 152  *                                    evaluation of a method or object
 153  *
 154  * RETURN:      Status
 155  *
 156  * DESCRIPTION: Check a returned package object for the correct count and
 157  *              correct type of all sub-objects.
 158  *
 159  ******************************************************************************/
 160
 161 ACPI_STATUS
 162 AcpiNsCheckPackage (
 163     ACPI_EVALUATE_INFO          *Info,
 164     ACPI_OPERAND_OBJECT         **ReturnObjectPtr)
 165 {
 166     ACPI_OPERAND_OBJECT         *ReturnObject = *ReturnObjectPtr;
 167     const ACPI_PREDEFINED_INFO  *Package;
 168     ACPI_OPERAND_OBJECT         **Elements;
 169     ACPI_STATUS                 Status = AE_OK;
 170     UINT32                      ExpectedCount;
 171     UINT32                      Count;
 172     UINT32                      i;
 173
 174
 175     ACPI_FUNCTION_NAME (NsCheckPackage);
 176
 177
 178     /* The package info for this name is in the next table entry */
 179
 180     Package = Info->Predefined + 1;
 181
 182     ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,
 183         "%s Validating return Package of Type %X, Count %X\n",
 184         Info->FullPathname, Package->RetInfo.Type,
 185         ReturnObject->Package.Count));
 186
 187     /*
 188      * For variable-length Packages, we can safely remove all embedded
 189      * and trailing NULL package elements
 190      */
 191     AcpiNsRemoveNullElements (Info, Package->RetInfo.Type, ReturnObject);
 192
 193     /* Extract package count and elements array */
 194
 195     Elements = ReturnObject->Package.Elements;
 196     Count = ReturnObject->Package.Count;
 197
 198     /*
 199      * Most packages must have at least one element. The only exception
 200      * is the variable-length package (ACPI_PTYPE1_VAR).
 201      */
 202     if (!Count)
 203     {
 204         if (Package->RetInfo.Type == ACPI_PTYPE1_VAR)
 205         {
 206             return (AE_OK);
 207         }
 208
 209         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 210             "Return Package has no elements (empty)"));
 211
 212         return (AE_AML_OPERAND_VALUE);
 213     }
 214
 215     /*
 216      * Decode the type of the expected package contents
 217      *
 218      * PTYPE1 packages contain no subpackages
 219      * PTYPE2 packages contain subpackages
 220      */
 221     switch (Package->RetInfo.Type)
 222     {
 223     case ACPI_PTYPE1_FIXED:
 224         /*
 225          * The package count is fixed and there are no subpackages
 226          *
 227          * If package is too small, exit.
 228          * If package is larger than expected, issue warning but continue
 229          */
 230         ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 231         if (Count < ExpectedCount)
 232         {
 233             goto PackageTooSmall;
 234         }
 235         else if (Count > ExpectedCount)
 236         {
 237             ACPI_DEBUG_PRINT ((ACPI_DB_REPAIR,
 238                 "%s: Return Package is larger than needed - "
 239                 "found %u, expected %u\n",
 240                 Info->FullPathname, Count, ExpectedCount));
 241         }
 242
 243         /* Validate all elements of the returned package */
 244
 245         Status = AcpiNsCheckPackageElements (Info, Elements,
 246                     Package->RetInfo.ObjectType1, Package->RetInfo.Count1,
 247                     Package->RetInfo.ObjectType2, Package->RetInfo.Count2, 0);
 248         break;
 249
 250     case ACPI_PTYPE1_VAR:
 251         /*
 252          * The package count is variable, there are no subpackages, and all
 253          * elements must be of the same type
 254          */
 255         for (i = 0; i < Count; i++)
 256         {
 257             Status = AcpiNsCheckObjectType (Info, Elements,
 258                         Package->RetInfo.ObjectType1, i);
 259             if (ACPI_FAILURE (Status))
 260             {
 261                 return (Status);
 262             }
 263             Elements++;
 264         }
 265         break;
 266
 267     case ACPI_PTYPE1_OPTION:
 268         /*
 269          * The package count is variable, there are no subpackages. There are
 270          * a fixed number of required elements, and a variable number of
 271          * optional elements.
 272          *
 273          * Check if package is at least as large as the minimum required
 274          */
 275         ExpectedCount = Package->RetInfo3.Count;
 276         if (Count < ExpectedCount)
 277         {
 278             goto PackageTooSmall;
 279         }
 280
 281         /* Variable number of sub-objects */
 282
 283         for (i = 0; i < Count; i++)
 284         {
 285             if (i < Package->RetInfo3.Count)
 286             {
 287                 /* These are the required package elements (0, 1, or 2) */
 288
 289                 Status = AcpiNsCheckObjectType (Info, Elements,
 290                             Package->RetInfo3.ObjectType[i], i);
 291                 if (ACPI_FAILURE (Status))
 292                 {
 293                     return (Status);
 294                 }
 295             }
 296             else
 297             {
 298                 /* These are the optional package elements */
 299
 300                 Status = AcpiNsCheckObjectType (Info, Elements,
 301                             Package->RetInfo3.TailObjectType, i);
 302                 if (ACPI_FAILURE (Status))
 303                 {
 304                     return (Status);
 305                 }
 306             }
 307             Elements++;
 308         }
 309         break;
 310
 311     case ACPI_PTYPE2_REV_FIXED:
 312
 313         /* First element is the (Integer) revision */
 314
 315         Status = AcpiNsCheckObjectType (Info, Elements,
 316                     ACPI_RTYPE_INTEGER, 0);
 317         if (ACPI_FAILURE (Status))
 318         {
 319             return (Status);
 320         }
 321
 322         Elements++;
 323         Count--;
 324
 325         /* Examine the subpackages */
 326
 327         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 328         break;
 329
 330     case ACPI_PTYPE2_PKG_COUNT:
 331
 332         /* First element is the (Integer) count of subpackages to follow */
 333
 334         Status = AcpiNsCheckObjectType (Info, Elements,
 335                     ACPI_RTYPE_INTEGER, 0);
 336         if (ACPI_FAILURE (Status))
 337         {
 338             return (Status);
 339         }
 340
 341         /*
 342          * Count cannot be larger than the parent package length, but allow it
 343          * to be smaller. The >= accounts for the Integer above.
 344          */
 345         ExpectedCount = (UINT32) (*Elements)->Integer.Value;
 346         if (ExpectedCount >= Count)
 347         {
 348             goto PackageTooSmall;
 349         }
 350
 351         Count = ExpectedCount;
 352         Elements++;
 353
 354         /* Examine the subpackages */
 355
 356         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 357         break;
 358
 359     case ACPI_PTYPE2:
 360     case ACPI_PTYPE2_FIXED:
 361     case ACPI_PTYPE2_MIN:
 362     case ACPI_PTYPE2_COUNT:
 363     case ACPI_PTYPE2_FIX_VAR:
 364         /*
 365          * These types all return a single Package that consists of a
 366          * variable number of subpackages.
 367          *
 368          * First, ensure that the first element is a subpackage. If not,
 369          * the BIOS may have incorrectly returned the object as a single
 370          * package instead of a Package of Packages (a common error if
 371          * there is only one entry). We may be able to repair this by
 372          * wrapping the returned Package with a new outer Package.
 373          */
 374         if (*Elements && ((*Elements)->Common.Type != ACPI_TYPE_PACKAGE))
 375         {
 376             /* Create the new outer package and populate it */
 377
 378             Status = AcpiNsWrapWithPackage (Info, ReturnObject, ReturnObjectPtr);
 379             if (ACPI_FAILURE (Status))
 380             {
 381                 return (Status);
 382             }
 383
 384             /* Update locals to point to the new package (of 1 element) */
 385
 386             ReturnObject = *ReturnObjectPtr;
 387             Elements = ReturnObject->Package.Elements;
 388             Count = 1;
 389         }
 390
 391         /* Examine the subpackages */
 392
 393         Status = AcpiNsCheckPackageList (Info, Package, Elements, Count);
 394         break;
 395
 396     default:
 397
 398         /* Should not get here if predefined info table is correct */
 399
 400         ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 401             "Invalid internal return type in table entry: %X",
 402             Package->RetInfo.Type));
 403
 404         return (AE_AML_INTERNAL);
 405     }
 406
 407     return (Status);
 408
 409
 410 PackageTooSmall:
 411
 412     /* Error exit for the case with an incorrect package count */
 413
 414     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 415         "Return Package is too small - found %u elements, expected %u",
 416         Count, ExpectedCount));
 417
 418     return (AE_AML_OPERAND_VALUE);
 419 }
 420
 421
 422 /*******************************************************************************
 423  *
 424  * FUNCTION:    AcpiNsCheckPackageList
 425  *
 426  * PARAMETERS:  Info            - Method execution information block
 427  *              Package         - Pointer to package-specific info for method
 428  *              Elements        - Element list of parent package. All elements
 429  *                                of this list should be of type Package.
 430  *              Count           - Count of subpackages
 431  *
 432  * RETURN:      Status
 433  *
 434  * DESCRIPTION: Examine a list of subpackages
 435  *
 436  ******************************************************************************/
 437
 438 static ACPI_STATUS
 439 AcpiNsCheckPackageList (
 440     ACPI_EVALUATE_INFO          *Info,
 441     const ACPI_PREDEFINED_INFO  *Package,
 442     ACPI_OPERAND_OBJECT         **Elements,
 443     UINT32                      Count)
 444 {
 445     ACPI_OPERAND_OBJECT         *SubPackage;
 446     ACPI_OPERAND_OBJECT         **SubElements;
 447     ACPI_STATUS                 Status;
 448     UINT32                      ExpectedCount;
 449     UINT32                      i;
 450     UINT32                      j;
 451
 452
 453     /*
 454      * Validate each subpackage in the parent Package
 455      *
 456      * NOTE: assumes list of subpackages contains no NULL elements.
 457      * Any NULL elements should have been removed by earlier call
 458      * to AcpiNsRemoveNullElements.
 459      */
 460     for (i = 0; i < Count; i++)
 461     {
 462         SubPackage = *Elements;
 463         SubElements = SubPackage->Package.Elements;
 464         Info->ParentPackage = SubPackage;
 465
 466         /* Each sub-object must be of type Package */
 467
 468         Status = AcpiNsCheckObjectType (Info, &SubPackage,
 469                     ACPI_RTYPE_PACKAGE, i);
 470         if (ACPI_FAILURE (Status))
 471         {
 472             return (Status);
 473         }
 474
 475         /* Examine the different types of expected subpackages */
 476
 477         Info->ParentPackage = SubPackage;
 478         switch (Package->RetInfo.Type)
 479         {
 480         case ACPI_PTYPE2:
 481         case ACPI_PTYPE2_PKG_COUNT:
 482         case ACPI_PTYPE2_REV_FIXED:
 483
 484             /* Each subpackage has a fixed number of elements */
 485
 486             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 487             if (SubPackage->Package.Count < ExpectedCount)
 488             {
 489                 goto PackageTooSmall;
 490             }
 491
 492             Status = AcpiNsCheckPackageElements (Info, SubElements,
 493                         Package->RetInfo.ObjectType1,
 494                         Package->RetInfo.Count1,
 495                         Package->RetInfo.ObjectType2,
 496                         Package->RetInfo.Count2, 0);
 497             if (ACPI_FAILURE (Status))
 498             {
 499                 return (Status);
 500             }
 501             break;
 502
 503         case ACPI_PTYPE2_FIX_VAR:
 504             /*
 505              * Each subpackage has a fixed number of elements and an
 506              * optional element
 507              */
 508             ExpectedCount = Package->RetInfo.Count1 + Package->RetInfo.Count2;
 509             if (SubPackage->Package.Count < ExpectedCount)
 510             {
 511                 goto PackageTooSmall;
 512             }
 513
 514             Status = AcpiNsCheckPackageElements (Info, SubElements,
 515                         Package->RetInfo.ObjectType1,
 516                         Package->RetInfo.Count1,
 517                         Package->RetInfo.ObjectType2,
 518                         SubPackage->Package.Count - Package->RetInfo.Count1, 0);
 519             if (ACPI_FAILURE (Status))
 520             {
 521                 return (Status);
 522             }
 523             break;
 524
 525         case ACPI_PTYPE2_FIXED:
 526
 527             /* Each subpackage has a fixed length */
 528
 529             ExpectedCount = Package->RetInfo2.Count;
 530             if (SubPackage->Package.Count < ExpectedCount)
 531             {
 532                 goto PackageTooSmall;
 533             }
 534
 535             /* Check the type of each subpackage element */
 536
 537             for (j = 0; j < ExpectedCount; j++)
 538             {
 539                 Status = AcpiNsCheckObjectType (Info, &SubElements[j],
 540                             Package->RetInfo2.ObjectType[j], j);
 541                 if (ACPI_FAILURE (Status))
 542                 {
 543                     return (Status);
 544                 }
 545             }
 546             break;
 547
 548         case ACPI_PTYPE2_MIN:
 549
 550             /* Each subpackage has a variable but minimum length */
 551
 552             ExpectedCount = Package->RetInfo.Count1;
 553             if (SubPackage->Package.Count < ExpectedCount)
 554             {
 555                 goto PackageTooSmall;
 556             }
 557
 558             /* Check the type of each subpackage element */
 559
 560             Status = AcpiNsCheckPackageElements (Info, SubElements,
 561                         Package->RetInfo.ObjectType1,
 562                         SubPackage->Package.Count, 0, 0, 0);
 563             if (ACPI_FAILURE (Status))
 564             {
 565                 return (Status);
 566             }
 567             break;
 568
 569         case ACPI_PTYPE2_COUNT:
 570             /*
 571              * First element is the (Integer) count of elements, including
 572              * the count field (the ACPI name is NumElements)
 573              */
 574             Status = AcpiNsCheckObjectType (Info, SubElements,
 575                         ACPI_RTYPE_INTEGER, 0);
 576             if (ACPI_FAILURE (Status))
 577             {
 578                 return (Status);
 579             }
 580
 581             /*
 582              * Make sure package is large enough for the Count and is
 583              * is as large as the minimum size
 584              */
 585             ExpectedCount = (UINT32) (*SubElements)->Integer.Value;
 586             if (SubPackage->Package.Count < ExpectedCount)
 587             {
 588                 goto PackageTooSmall;
 589             }
 590             if (SubPackage->Package.Count < Package->RetInfo.Count1)
 591             {
 592                 ExpectedCount = Package->RetInfo.Count1;
 593                 goto PackageTooSmall;
 594             }
 595             if (ExpectedCount == 0)
 596             {
 597                 /*
 598                  * Either the NumEntries element was originally zero or it was
 599                  * a NULL element and repaired to an Integer of value zero.
 600                  * In either case, repair it by setting NumEntries to be the
 601                  * actual size of the subpackage.
 602                  */
 603                 ExpectedCount = SubPackage->Package.Count;
 604                 (*SubElements)->Integer.Value = ExpectedCount;
 605             }
 606
 607             /* Check the type of each subpackage element */
 608
 609             Status = AcpiNsCheckPackageElements (Info, (SubElements + 1),
 610                         Package->RetInfo.ObjectType1,
 611                         (ExpectedCount - 1), 0, 0, 1);
 612             if (ACPI_FAILURE (Status))
 613             {
 614                 return (Status);
 615             }
 616             break;
 617
 618         default: /* Should not get here, type was validated by caller */
 619
 620             return (AE_AML_INTERNAL);
 621         }
 622
 623         Elements++;
 624     }
 625
 626     return (AE_OK);
 627
 628
 629 PackageTooSmall:
 630
 631     /* The subpackage count was smaller than required */
 632
 633     ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, Info->NodeFlags,
 634         "Return SubPackage[%u] is too small - found %u elements, expected %u",
 635         i, SubPackage->Package.Count, ExpectedCount));
 636
 637     return (AE_AML_OPERAND_VALUE);
 638 }
 639
 640
 641 /*******************************************************************************
 642  *
 643  * FUNCTION:    AcpiNsCheckPackageElements
 644  *
 645  * PARAMETERS:  Info            - Method execution information block
 646  *              Elements        - Pointer to the package elements array
 647  *              Type1           - Object type for first group
 648  *              Count1          - Count for first group
 649  *              Type2           - Object type for second group
 650  *              Count2          - Count for second group
 651  *              StartIndex      - Start of the first group of elements
 652  *
 653  * RETURN:      Status
 654  *
 655  * DESCRIPTION: Check that all elements of a package are of the correct object
 656  *              type. Supports up to two groups of different object types.
 657  *
 658  ******************************************************************************/
 659
 660 static ACPI_STATUS
 661 AcpiNsCheckPackageElements (
 662     ACPI_EVALUATE_INFO          *Info,
 663     ACPI_OPERAND_OBJECT         **Elements,
 664     UINT8                       Type1,
 665     UINT32                      Count1,
 666     UINT8                       Type2,
 667     UINT32                      Count2,
 668     UINT32                      StartIndex)
 669 {
 670     ACPI_OPERAND_OBJECT         **ThisElement = Elements;
 671     ACPI_STATUS                 Status;
 672     UINT32                      i;
 673
 674
 675     /*
 676      * Up to two groups of package elements are supported by the data
 677      * structure. All elements in each group must be of the same type.
 678      * The second group can have a count of zero.
 679      */
 680     for (i = 0; i < Count1; i++)
 681     {
 682         Status = AcpiNsCheckObjectType (Info, ThisElement,
 683                     Type1, i + StartIndex);
 684         if (ACPI_FAILURE (Status))
 685         {
 686             return (Status);
 687         }
 688         ThisElement++;
 689     }
 690
 691     for (i = 0; i < Count2; i++)
 692     {
 693         Status = AcpiNsCheckObjectType (Info, ThisElement,
 694                     Type2, (i + Count1 + StartIndex));
 695         if (ACPI_FAILURE (Status))
 696         {
 697             return (Status);
 698         }
 699         ThisElement++;
 700     }
 701
 702     return (AE_OK);
 703 }