sys/contrib/dev/acpica-unix-20061109/resources/rsmisc.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsmisc - Miscellaneous resource descriptors
   4  *              $Revision: 1.45 $
   5  *
   6  ******************************************************************************/
   7
   8 /******************************************************************************
   9  *
  10  * 1. Copyright Notice
  11  *
  12  * Some or all of this work - Copyright (c) 1999 - 2006, Intel Corp.
  13  * All rights reserved.
  14  *
  15  * 2. License
  16  *
  17  * 2.1. This is your license from Intel Corp. under its intellectual property
  18  * rights.  You may have additional license terms from the party that provided
  19  * you this software, covering your right to use that party's intellectual
  20  * property rights.
  21  *
  22  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  23  * copy of the source code appearing in this file ("Covered Code") an
  24  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  25  * base code distributed originally by Intel ("Original Intel Code") to copy,
  26  * make derivatives, distribute, use and display any portion of the Covered
  27  * Code in any form, with the right to sublicense such rights; and
  28  *
  29  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  30  * license (with the right to sublicense), under only those claims of Intel
  31  * patents that are infringed by the Original Intel Code, to make, use, sell,
  32  * offer to sell, and import the Covered Code and derivative works thereof
  33  * solely to the minimum extent necessary to exercise the above copyright
  34  * license, and in no event shall the patent license extend to any additions
  35  * to or modifications of the Original Intel Code.  No other license or right
  36  * is granted directly or by implication, estoppel or otherwise;
  37  *
  38  * The above copyright and patent license is granted only if the following
  39  * conditions are met:
  40  *
  41  * 3. Conditions
  42  *
  43  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  44  * Redistribution of source code of any substantial portion of the Covered
  45  * Code or modification with rights to further distribute source must include
  46  * the above Copyright Notice, the above License, this list of Conditions,
  47  * and the following Disclaimer and Export Compliance provision.  In addition,
  48  * Licensee must cause all Covered Code to which Licensee contributes to
  49  * contain a file documenting the changes Licensee made to create that Covered
  50  * Code and the date of any change.  Licensee must include in that file the
  51  * documentation of any changes made by any predecessor Licensee.  Licensee
  52  * must include a prominent statement that the modification is derived,
  53  * directly or indirectly, from Original Intel Code.
  54  *
  55  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  56  * Redistribution of source code of any substantial portion of the Covered
  57  * Code or modification without rights to further distribute source must
  58  * include the following Disclaimer and Export Compliance provision in the
  59  * documentation and/or other materials provided with distribution.  In
  60  * addition, Licensee may not authorize further sublicense of source of any
  61  * portion of the Covered Code, and must include terms to the effect that the
  62  * license from Licensee to its licensee is limited to the intellectual
  63  * property embodied in the software Licensee provides to its licensee, and
  64  * not to intellectual property embodied in modifications its licensee may
  65  * make.
  66  *
  67  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  68  * substantial portion of the Covered Code or modification must reproduce the
  69  * above Copyright Notice, and the following Disclaimer and Export Compliance
  70  * provision in the documentation and/or other materials provided with the
  71  * distribution.
  72  *
  73  * 3.4. Intel retains all right, title, and interest in and to the Original
  74  * Intel Code.
  75  *
  76  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  77  * Intel shall be used in advertising or otherwise to promote the sale, use or
  78  * other dealings in products derived from or relating to the Covered Code
  79  * without prior written authorization from Intel.
  80  *
  81  * 4. Disclaimer and Export Compliance
  82  *
  83  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  84  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  85  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  86  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  87  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  88  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  89  * PARTICULAR PURPOSE.
  90  *
  91  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  92  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  93  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  94  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  95  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  96  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  97  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  98  * LIMITED REMEDY.
  99  *
 100  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 101  * software or system incorporating such software without first obtaining any
 102  * required license or other approval from the U. S. Department of Commerce or
 103  * any other agency or department of the United States Government.  In the
 104  * event Licensee exports any such software from the United States or
 105  * re-exports any such software from a foreign destination, Licensee shall
 106  * ensure that the distribution and export/re-export of the software is in
 107  * compliance with all laws, regulations, orders, or other restrictions of the
 108  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 109  * any of its subsidiaries will export/re-export any technical data, process,
 110  * software, or service, directly or indirectly, to any country for which the
 111  * United States government or any agency thereof requires an export license,
 112  * other governmental approval, or letter of assurance, without first obtaining
 113  * such license, approval or letter.
 114  *
 115  *****************************************************************************/
 116
 117 #define __RSMISC_C__
 118
 119 #include "acpi.h"
 120 #include "acresrc.h"
 121
 122 #define _COMPONENT          ACPI_RESOURCES
 123         ACPI_MODULE_NAME    ("rsmisc")
 124
 125
 126 #define INIT_RESOURCE_TYPE(i)       i->ResourceOffset
 127 #define INIT_RESOURCE_LENGTH(i)     i->AmlOffset
 128 #define INIT_TABLE_LENGTH(i)        i->Value
 129
 130 #define COMPARE_OPCODE(i)           i->ResourceOffset
 131 #define COMPARE_TARGET(i)           i->AmlOffset
 132 #define COMPARE_VALUE(i)            i->Value
 133
 134
 135 /*******************************************************************************
 136  *
 137  * FUNCTION:    AcpiRsConvertAmlToResource
 138  *
 139  * PARAMETERS:  Resource            - Pointer to the resource descriptor
 140  *              Aml                 - Where the AML descriptor is returned
 141  *              Info                - Pointer to appropriate conversion table
 142  *
 143  * RETURN:      Status
 144  *
 145  * DESCRIPTION: Convert an external AML resource descriptor to the corresponding
 146  *              internal resource descriptor
 147  *
 148  ******************************************************************************/
 149
 150 ACPI_STATUS
 151 AcpiRsConvertAmlToResource (
 152     ACPI_RESOURCE           *Resource,
 153     AML_RESOURCE            *Aml,
 154     ACPI_RSCONVERT_INFO     *Info)
 155 {
 156     ACPI_RS_LENGTH          AmlResourceLength;
 157     void                    *Source;
 158     void                    *Destination;
 159     char                    *Target;
 160     UINT8                   Count;
 161     UINT8                   FlagsMode = FALSE;
 162     UINT16                  ItemCount = 0;
 163     UINT16                  Temp16 = 0;
 164
 165
 166     ACPI_FUNCTION_TRACE (RsConvertAmlToResource);
 167
 168
 169     if (((ACPI_NATIVE_UINT) Resource) & 0x3)
 170     {
 171         /* Each internal resource struct is expected to be 32-bit aligned */
 172
 173         ACPI_WARNING ((AE_INFO,
 174             "Misaligned resource pointer (get): %p Type %2.2X Len %X",
 175             Resource, Resource->Type, Resource->Length));
 176     }
 177
 178     /* Extract the resource Length field (does not include header length) */
 179
 180     AmlResourceLength = AcpiUtGetResourceLength (Aml);
 181
 182     /*
 183      * First table entry must be ACPI_RSC_INITxxx and must contain the
 184      * table length (# of table entries)
 185      */
 186     Count = INIT_TABLE_LENGTH (Info);
 187
 188     while (Count)
 189     {
 190         /*
 191          * Source is the external AML byte stream buffer,
 192          * destination is the internal resource descriptor
 193          */
 194         Source      = ACPI_ADD_PTR (void, Aml, Info->AmlOffset);
 195         Destination = ACPI_ADD_PTR (void, Resource, Info->ResourceOffset);
 196
 197         switch (Info->Opcode)
 198         {
 199         case ACPI_RSC_INITGET:
 200             /*
 201              * Get the resource type and the initial (minimum) length
 202              */
 203             ACPI_MEMSET (Resource, 0, INIT_RESOURCE_LENGTH (Info));
 204             Resource->Type = INIT_RESOURCE_TYPE (Info);
 205             Resource->Length = INIT_RESOURCE_LENGTH (Info);
 206             break;
 207
 208
 209         case ACPI_RSC_INITSET:
 210             break;
 211
 212
 213         case ACPI_RSC_FLAGINIT:
 214
 215             FlagsMode = TRUE;
 216             break;
 217
 218
 219         case ACPI_RSC_1BITFLAG:
 220             /*
 221              * Mask and shift the flag bit
 222              */
 223             ACPI_SET8 (Destination) = (UINT8)
 224                 ((ACPI_GET8 (Source) >> Info->Value) & 0x01);
 225             break;
 226
 227
 228         case ACPI_RSC_2BITFLAG:
 229             /*
 230              * Mask and shift the flag bits
 231              */
 232             ACPI_SET8 (Destination) = (UINT8)
 233                 ((ACPI_GET8 (Source) >> Info->Value) & 0x03);
 234             break;
 235
 236
 237         case ACPI_RSC_COUNT:
 238
 239             ItemCount = ACPI_GET8 (Source);
 240             ACPI_SET8 (Destination) = (UINT8) ItemCount;
 241
 242             Resource->Length = Resource->Length +
 243                 (Info->Value * (ItemCount - 1));
 244             break;
 245
 246
 247         case ACPI_RSC_COUNT16:
 248
 249             ItemCount = AmlResourceLength;
 250             ACPI_SET16 (Destination) = ItemCount;
 251
 252             Resource->Length = Resource->Length +
 253                 (Info->Value * (ItemCount - 1));
 254             break;
 255
 256
 257         case ACPI_RSC_LENGTH:
 258
 259             Resource->Length = Resource->Length + Info->Value;
 260             break;
 261
 262
 263         case ACPI_RSC_MOVE8:
 264         case ACPI_RSC_MOVE16:
 265         case ACPI_RSC_MOVE32:
 266         case ACPI_RSC_MOVE64:
 267             /*
 268              * Raw data move. Use the Info value field unless ItemCount has
 269              * been previously initialized via a COUNT opcode
 270              */
 271             if (Info->Value)
 272             {
 273                 ItemCount = Info->Value;
 274             }
 275             AcpiRsMoveData (Destination, Source, ItemCount, Info->Opcode);
 276             break;
 277
 278
 279         case ACPI_RSC_SET8:
 280
 281             ACPI_MEMSET (Destination, Info->AmlOffset, Info->Value);
 282             break;
 283
 284
 285         case ACPI_RSC_DATA8:
 286
 287             Target = ACPI_ADD_PTR (char, Resource, Info->Value);
 288             ACPI_MEMCPY (Destination, Source,  ACPI_GET16 (Target));
 289             break;
 290
 291
 292         case ACPI_RSC_ADDRESS:
 293             /*
 294              * Common handler for address descriptor flags
 295              */
 296             if (!AcpiRsGetAddressCommon (Resource, Aml))
 297             {
 298                 return_ACPI_STATUS (AE_AML_INVALID_RESOURCE_TYPE);
 299             }
 300             break;
 301
 302
 303         case ACPI_RSC_SOURCE:
 304             /*
 305              * Optional ResourceSource (Index and String)
 306              */
 307             Resource->Length +=
 308                 AcpiRsGetResourceSource (AmlResourceLength, Info->Value,
 309                     Destination, Aml, NULL);
 310             break;
 311
 312
 313         case ACPI_RSC_SOURCEX:
 314             /*
 315              * Optional ResourceSource (Index and String). This is the more
 316              * complicated case used by the Interrupt() macro
 317              */
 318             Target = ACPI_ADD_PTR (char, Resource, Info->AmlOffset + (ItemCount * 4));
 319
 320             Resource->Length +=
 321                 AcpiRsGetResourceSource (AmlResourceLength,
 322                     (ACPI_RS_LENGTH) (((ItemCount - 1) * sizeof (UINT32)) + Info->Value),
 323                     Destination, Aml, Target);
 324             break;
 325
 326
 327         case ACPI_RSC_BITMASK:
 328             /*
 329              * 8-bit encoded bitmask (DMA macro)
 330              */
 331             ItemCount = AcpiRsDecodeBitmask (ACPI_GET8 (Source), Destination);
 332             if (ItemCount)
 333             {
 334                 Resource->Length += (ItemCount - 1);
 335             }
 336
 337             Target = ACPI_ADD_PTR (char, Resource, Info->Value);
 338             ACPI_SET8 (Target) = (UINT8) ItemCount;
 339             break;
 340
 341
 342         case ACPI_RSC_BITMASK16:
 343             /*
 344              * 16-bit encoded bitmask (IRQ macro)
 345              */
 346             ACPI_MOVE_16_TO_16 (&Temp16, Source);
 347
 348             ItemCount = AcpiRsDecodeBitmask (Temp16, Destination);
 349             if (ItemCount)
 350             {
 351                 Resource->Length += (ItemCount - 1);
 352             }
 353
 354             Target = ACPI_ADD_PTR (char, Resource, Info->Value);
 355             ACPI_SET8 (Target) = (UINT8) ItemCount;
 356             break;
 357
 358
 359         case ACPI_RSC_EXIT_NE:
 360             /*
 361              * Control - Exit conversion if not equal
 362              */
 363             switch (Info->ResourceOffset)
 364             {
 365             case ACPI_RSC_COMPARE_AML_LENGTH:
 366                 if (AmlResourceLength != Info->Value)
 367                 {
 368                     goto Exit;
 369                 }
 370                 break;
 371
 372             case ACPI_RSC_COMPARE_VALUE:
 373                 if (ACPI_GET8 (Source) != Info->Value)
 374                 {
 375                     goto Exit;
 376                 }
 377                 break;
 378
 379             default:
 380
 381                 ACPI_ERROR ((AE_INFO, "Invalid conversion sub-opcode"));
 382                 return_ACPI_STATUS (AE_BAD_PARAMETER);
 383             }
 384             break;
 385
 386
 387         default:
 388
 389             ACPI_ERROR ((AE_INFO, "Invalid conversion opcode"));
 390             return_ACPI_STATUS (AE_BAD_PARAMETER);
 391         }
 392
 393         Count--;
 394         Info++;
 395     }
 396
 397 Exit:
 398     if (!FlagsMode)
 399     {
 400         /* Round the resource struct length up to the next boundary (32 or 64) */
 401
 402         Resource->Length = (UINT32) ACPI_ROUND_UP_TO_NATIVE_WORD (Resource->Length);
 403     }
 404     return_ACPI_STATUS (AE_OK);
 405 }
 406
 407
 408 /*******************************************************************************
 409  *
 410  * FUNCTION:    AcpiRsConvertResourceToAml
 411  *
 412  * PARAMETERS:  Resource            - Pointer to the resource descriptor
 413  *              Aml                 - Where the AML descriptor is returned
 414  *              Info                - Pointer to appropriate conversion table
 415  *
 416  * RETURN:      Status
 417  *
 418  * DESCRIPTION: Convert an internal resource descriptor to the corresponding
 419  *              external AML resource descriptor.
 420  *
 421  ******************************************************************************/
 422
 423 ACPI_STATUS
 424 AcpiRsConvertResourceToAml (
 425     ACPI_RESOURCE           *Resource,
 426     AML_RESOURCE            *Aml,
 427     ACPI_RSCONVERT_INFO     *Info)
 428 {
 429     void                    *Source = NULL;
 430     void                    *Destination;
 431     ACPI_RSDESC_SIZE        AmlLength = 0;
 432     UINT8                   Count;
 433     UINT16                  Temp16 = 0;
 434     UINT16                  ItemCount = 0;
 435
 436
 437     ACPI_FUNCTION_TRACE (RsConvertResourceToAml);
 438
 439
 440     /*
 441      * First table entry must be ACPI_RSC_INITxxx and must contain the
 442      * table length (# of table entries)
 443      */
 444     Count = INIT_TABLE_LENGTH (Info);
 445
 446     while (Count)
 447     {
 448         /*
 449          * Source is the internal resource descriptor,
 450          * destination is the external AML byte stream buffer
 451          */
 452         Source      = ACPI_ADD_PTR (void, Resource, Info->ResourceOffset);
 453         Destination = ACPI_ADD_PTR (void, Aml, Info->AmlOffset);
 454
 455         switch (Info->Opcode)
 456         {
 457         case ACPI_RSC_INITSET:
 458
 459             ACPI_MEMSET (Aml, 0, INIT_RESOURCE_LENGTH (Info));
 460             AmlLength = INIT_RESOURCE_LENGTH (Info);
 461             AcpiRsSetResourceHeader (INIT_RESOURCE_TYPE (Info), AmlLength, Aml);
 462             break;
 463
 464
 465         case ACPI_RSC_INITGET:
 466             break;
 467
 468
 469         case ACPI_RSC_FLAGINIT:
 470             /*
 471              * Clear the flag byte
 472              */
 473             ACPI_SET8 (Destination) = 0;
 474             break;
 475
 476
 477         case ACPI_RSC_1BITFLAG:
 478             /*
 479              * Mask and shift the flag bit
 480              */
 481             ACPI_SET8 (Destination) |= (UINT8)
 482                 ((ACPI_GET8 (Source) & 0x01) << Info->Value);
 483             break;
 484
 485
 486         case ACPI_RSC_2BITFLAG:
 487             /*
 488              * Mask and shift the flag bits
 489              */
 490             ACPI_SET8 (Destination) |= (UINT8)
 491                 ((ACPI_GET8 (Source) & 0x03) << Info->Value);
 492             break;
 493
 494
 495         case ACPI_RSC_COUNT:
 496
 497             ItemCount = ACPI_GET8 (Source);
 498             ACPI_SET8 (Destination) = (UINT8) ItemCount;
 499
 500             AmlLength = (UINT16) (AmlLength + (Info->Value * (ItemCount - 1)));
 501             break;
 502
 503
 504         case ACPI_RSC_COUNT16:
 505
 506             ItemCount = ACPI_GET16 (Source);
 507             AmlLength = (UINT16) (AmlLength + ItemCount);
 508             AcpiRsSetResourceLength (AmlLength, Aml);
 509             break;
 510
 511
 512         case ACPI_RSC_LENGTH:
 513
 514             AcpiRsSetResourceLength (Info->Value, Aml);
 515             break;
 516
 517
 518         case ACPI_RSC_MOVE8:
 519         case ACPI_RSC_MOVE16:
 520         case ACPI_RSC_MOVE32:
 521         case ACPI_RSC_MOVE64:
 522
 523             if (Info->Value)
 524             {
 525                 ItemCount = Info->Value;
 526             }
 527             AcpiRsMoveData (Destination, Source, ItemCount, Info->Opcode);
 528             break;
 529
 530
 531         case ACPI_RSC_ADDRESS:
 532
 533             /* Set the Resource Type, General Flags, and Type-Specific Flags */
 534
 535             AcpiRsSetAddressCommon (Aml, Resource);
 536             break;
 537
 538
 539         case ACPI_RSC_SOURCEX:
 540             /*
 541              * Optional ResourceSource (Index and String)
 542              */
 543             AmlLength = AcpiRsSetResourceSource (
 544                             Aml, (ACPI_RS_LENGTH) AmlLength, Source);
 545             AcpiRsSetResourceLength (AmlLength, Aml);
 546             break;
 547
 548
 549         case ACPI_RSC_SOURCE:
 550             /*
 551              * Optional ResourceSource (Index and String). This is the more
 552              * complicated case used by the Interrupt() macro
 553              */
 554             AmlLength = AcpiRsSetResourceSource (Aml, Info->Value, Source);
 555             AcpiRsSetResourceLength (AmlLength, Aml);
 556             break;
 557
 558
 559         case ACPI_RSC_BITMASK:
 560             /*
 561              * 8-bit encoded bitmask (DMA macro)
 562              */
 563             ACPI_SET8 (Destination) = (UINT8)
 564                 AcpiRsEncodeBitmask (Source,
 565                     *ACPI_ADD_PTR (UINT8, Resource, Info->Value));
 566             break;
 567
 568
 569         case ACPI_RSC_BITMASK16:
 570             /*
 571              * 16-bit encoded bitmask (IRQ macro)
 572              */
 573             Temp16 = AcpiRsEncodeBitmask (Source,
 574                         *ACPI_ADD_PTR (UINT8, Resource, Info->Value));
 575             ACPI_MOVE_16_TO_16 (Destination, &Temp16);
 576             break;
 577
 578
 579         case ACPI_RSC_EXIT_LE:
 580             /*
 581              * Control - Exit conversion if less than or equal
 582              */
 583             if (ItemCount <= Info->Value)
 584             {
 585                 goto Exit;
 586             }
 587             break;
 588
 589
 590         case ACPI_RSC_EXIT_NE:
 591             /*
 592              * Control - Exit conversion if not equal
 593              */
 594             switch (COMPARE_OPCODE (Info))
 595             {
 596             case ACPI_RSC_COMPARE_VALUE:
 597
 598                 if (*ACPI_ADD_PTR (UINT8, Resource,
 599                         COMPARE_TARGET (Info)) != COMPARE_VALUE (Info))
 600                 {
 601                     goto Exit;
 602                 }
 603                 break;
 604
 605             default:
 606
 607                 ACPI_ERROR ((AE_INFO, "Invalid conversion sub-opcode"));
 608                 return_ACPI_STATUS (AE_BAD_PARAMETER);
 609             }
 610             break;
 611
 612
 613         default:
 614
 615             ACPI_ERROR ((AE_INFO, "Invalid conversion opcode"));
 616             return_ACPI_STATUS (AE_BAD_PARAMETER);
 617         }
 618
 619         Count--;
 620         Info++;
 621     }
 622
 623 Exit:
 624     return_ACPI_STATUS (AE_OK);
 625 }
 626
 627
 628 #if 0
 629 /* Previous resource validations */
 630
 631     if (Aml->ExtAddress64.RevisionID != AML_RESOURCE_EXTENDED_ADDRESS_REVISION)
 632     {
 633         return_ACPI_STATUS (AE_SUPPORT);
 634     }
 635
 636     if (Resource->Data.StartDpf.PerformanceRobustness >= 3)
 637     {
 638         return_ACPI_STATUS (AE_AML_BAD_RESOURCE_VALUE);
 639     }
 640
 641     if (((Aml->Irq.Flags & 0x09) == 0x00) ||
 642         ((Aml->Irq.Flags & 0x09) == 0x09))
 643     {
 644         /*
 645          * Only [ActiveHigh, EdgeSensitive] or [ActiveLow, LevelSensitive]
 646          * polarity/trigger interrupts are allowed (ACPI spec, section
 647          * "IRQ Format"), so 0x00 and 0x09 are illegal.
 648          */
 649         ACPI_ERROR ((AE_INFO,
 650             "Invalid interrupt polarity/trigger in resource list, %X",
 651             Aml->Irq.Flags));
 652         return_ACPI_STATUS (AE_BAD_DATA);
 653     }
 654
 655     Resource->Data.ExtendedIrq.InterruptCount = Temp8;
 656     if (Temp8 < 1)
 657     {
 658         /* Must have at least one IRQ */
 659
 660         return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH);
 661     }
 662
 663     if (Resource->Data.Dma.Transfer == 0x03)
 664     {
 665         ACPI_ERROR ((AE_INFO,
 666             "Invalid DMA.Transfer preference (3)"));
 667         return_ACPI_STATUS (AE_BAD_DATA);
 668     }
 669 #endif
 670
 671