1 /******************************************************************************* 2 * 3 * Module Name: utresrc - Resource management utilities 4 * 5 ******************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2015, 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 <contrib/dev/acpica/include/acpi.h> 45 #include <contrib/dev/acpica/include/accommon.h> 46 #include <contrib/dev/acpica/include/acresrc.h> 47 48 49 #define _COMPONENT ACPI_UTILITIES 50 ACPI_MODULE_NAME ("utresrc") 51 52 53 #if defined(ACPI_DEBUG_OUTPUT) || defined (ACPI_DISASSEMBLER) || defined (ACPI_DEBUGGER) 54 55 /* 56 * Strings used to decode resource descriptors. 57 * Used by both the disassembler and the debugger resource dump routines 58 */ 59 const char *AcpiGbl_BmDecode[] = 60 { 61 "NotBusMaster", 62 "BusMaster" 63 }; 64 65 const char *AcpiGbl_ConfigDecode[] = 66 { 67 "0 - Good Configuration", 68 "1 - Acceptable Configuration", 69 "2 - Suboptimal Configuration", 70 "3 - ***Invalid Configuration***", 71 }; 72 73 const char *AcpiGbl_ConsumeDecode[] = 74 { 75 "ResourceProducer", 76 "ResourceConsumer" 77 }; 78 79 const char *AcpiGbl_DecDecode[] = 80 { 81 "PosDecode", 82 "SubDecode" 83 }; 84 85 const char *AcpiGbl_HeDecode[] = 86 { 87 "Level", 88 "Edge" 89 }; 90 91 const char *AcpiGbl_IoDecode[] = 92 { 93 "Decode10", 94 "Decode16" 95 }; 96 97 const char *AcpiGbl_LlDecode[] = 98 { 99 "ActiveHigh", 100 "ActiveLow", 101 "ActiveBoth", 102 "Reserved" 103 }; 104 105 const char *AcpiGbl_MaxDecode[] = 106 { 107 "MaxNotFixed", 108 "MaxFixed" 109 }; 110 111 const char *AcpiGbl_MemDecode[] = 112 { 113 "NonCacheable", 114 "Cacheable", 115 "WriteCombining", 116 "Prefetchable" 117 }; 118 119 const char *AcpiGbl_MinDecode[] = 120 { 121 "MinNotFixed", 122 "MinFixed" 123 }; 124 125 const char *AcpiGbl_MtpDecode[] = 126 { 127 "AddressRangeMemory", 128 "AddressRangeReserved", 129 "AddressRangeACPI", 130 "AddressRangeNVS" 131 }; 132 133 const char *AcpiGbl_RngDecode[] = 134 { 135 "InvalidRanges", 136 "NonISAOnlyRanges", 137 "ISAOnlyRanges", 138 "EntireRange" 139 }; 140 141 const char *AcpiGbl_RwDecode[] = 142 { 143 "ReadOnly", 144 "ReadWrite" 145 }; 146 147 const char *AcpiGbl_ShrDecode[] = 148 { 149 "Exclusive", 150 "Shared", 151 "ExclusiveAndWake", /* ACPI 5.0 */ 152 "SharedAndWake" /* ACPI 5.0 */ 153 }; 154 155 const char *AcpiGbl_SizDecode[] = 156 { 157 "Transfer8", 158 "Transfer8_16", 159 "Transfer16", 160 "InvalidSize" 161 }; 162 163 const char *AcpiGbl_TrsDecode[] = 164 { 165 "DenseTranslation", 166 "SparseTranslation" 167 }; 168 169 const char *AcpiGbl_TtpDecode[] = 170 { 171 "TypeStatic", 172 "TypeTranslation" 173 }; 174 175 const char *AcpiGbl_TypDecode[] = 176 { 177 "Compatibility", 178 "TypeA", 179 "TypeB", 180 "TypeF" 181 }; 182 183 const char *AcpiGbl_PpcDecode[] = 184 { 185 "PullDefault", 186 "PullUp", 187 "PullDown", 188 "PullNone" 189 }; 190 191 const char *AcpiGbl_IorDecode[] = 192 { 193 "IoRestrictionNone", 194 "IoRestrictionInputOnly", 195 "IoRestrictionOutputOnly", 196 "IoRestrictionNoneAndPreserve" 197 }; 198 199 const char *AcpiGbl_DtsDecode[] = 200 { 201 "Width8bit", 202 "Width16bit", 203 "Width32bit", 204 "Width64bit", 205 "Width128bit", 206 "Width256bit", 207 }; 208 209 /* GPIO connection type */ 210 211 const char *AcpiGbl_CtDecode[] = 212 { 213 "Interrupt", 214 "I/O" 215 }; 216 217 /* Serial bus type */ 218 219 const char *AcpiGbl_SbtDecode[] = 220 { 221 "/* UNKNOWN serial bus type */", 222 "I2C", 223 "SPI", 224 "UART" 225 }; 226 227 /* I2C serial bus access mode */ 228 229 const char *AcpiGbl_AmDecode[] = 230 { 231 "AddressingMode7Bit", 232 "AddressingMode10Bit" 233 }; 234 235 /* I2C serial bus slave mode */ 236 237 const char *AcpiGbl_SmDecode[] = 238 { 239 "ControllerInitiated", 240 "DeviceInitiated" 241 }; 242 243 /* SPI serial bus wire mode */ 244 245 const char *AcpiGbl_WmDecode[] = 246 { 247 "FourWireMode", 248 "ThreeWireMode" 249 }; 250 251 /* SPI serial clock phase */ 252 253 const char *AcpiGbl_CphDecode[] = 254 { 255 "ClockPhaseFirst", 256 "ClockPhaseSecond" 257 }; 258 259 /* SPI serial bus clock polarity */ 260 261 const char *AcpiGbl_CpoDecode[] = 262 { 263 "ClockPolarityLow", 264 "ClockPolarityHigh" 265 }; 266 267 /* SPI serial bus device polarity */ 268 269 const char *AcpiGbl_DpDecode[] = 270 { 271 "PolarityLow", 272 "PolarityHigh" 273 }; 274 275 /* UART serial bus endian */ 276 277 const char *AcpiGbl_EdDecode[] = 278 { 279 "LittleEndian", 280 "BigEndian" 281 }; 282 283 /* UART serial bus bits per byte */ 284 285 const char *AcpiGbl_BpbDecode[] = 286 { 287 "DataBitsFive", 288 "DataBitsSix", 289 "DataBitsSeven", 290 "DataBitsEight", 291 "DataBitsNine", 292 "/* UNKNOWN Bits per byte */", 293 "/* UNKNOWN Bits per byte */", 294 "/* UNKNOWN Bits per byte */" 295 }; 296 297 /* UART serial bus stop bits */ 298 299 const char *AcpiGbl_SbDecode[] = 300 { 301 "StopBitsZero", 302 "StopBitsOne", 303 "StopBitsOnePlusHalf", 304 "StopBitsTwo" 305 }; 306 307 /* UART serial bus flow control */ 308 309 const char *AcpiGbl_FcDecode[] = 310 { 311 "FlowControlNone", 312 "FlowControlHardware", 313 "FlowControlXON", 314 "/* UNKNOWN flow control keyword */" 315 }; 316 317 /* UART serial bus parity type */ 318 319 const char *AcpiGbl_PtDecode[] = 320 { 321 "ParityTypeNone", 322 "ParityTypeEven", 323 "ParityTypeOdd", 324 "ParityTypeMark", 325 "ParityTypeSpace", 326 "/* UNKNOWN parity keyword */", 327 "/* UNKNOWN parity keyword */", 328 "/* UNKNOWN parity keyword */" 329 }; 330 331 #endif 332 333 334 /* 335 * Base sizes of the raw AML resource descriptors, indexed by resource type. 336 * Zero indicates a reserved (and therefore invalid) resource type. 337 */ 338 const UINT8 AcpiGbl_ResourceAmlSizes[] = 339 { 340 /* Small descriptors */ 341 342 0, 343 0, 344 0, 345 0, 346 ACPI_AML_SIZE_SMALL (AML_RESOURCE_IRQ), 347 ACPI_AML_SIZE_SMALL (AML_RESOURCE_DMA), 348 ACPI_AML_SIZE_SMALL (AML_RESOURCE_START_DEPENDENT), 349 ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_DEPENDENT), 350 ACPI_AML_SIZE_SMALL (AML_RESOURCE_IO), 351 ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_IO), 352 ACPI_AML_SIZE_SMALL (AML_RESOURCE_FIXED_DMA), 353 0, 354 0, 355 0, 356 ACPI_AML_SIZE_SMALL (AML_RESOURCE_VENDOR_SMALL), 357 ACPI_AML_SIZE_SMALL (AML_RESOURCE_END_TAG), 358 359 /* Large descriptors */ 360 361 0, 362 ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY24), 363 ACPI_AML_SIZE_LARGE (AML_RESOURCE_GENERIC_REGISTER), 364 0, 365 ACPI_AML_SIZE_LARGE (AML_RESOURCE_VENDOR_LARGE), 366 ACPI_AML_SIZE_LARGE (AML_RESOURCE_MEMORY32), 367 ACPI_AML_SIZE_LARGE (AML_RESOURCE_FIXED_MEMORY32), 368 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS32), 369 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS16), 370 ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_IRQ), 371 ACPI_AML_SIZE_LARGE (AML_RESOURCE_ADDRESS64), 372 ACPI_AML_SIZE_LARGE (AML_RESOURCE_EXTENDED_ADDRESS64), 373 ACPI_AML_SIZE_LARGE (AML_RESOURCE_GPIO), 374 0, 375 ACPI_AML_SIZE_LARGE (AML_RESOURCE_COMMON_SERIALBUS), 376 }; 377 378 const UINT8 AcpiGbl_ResourceAmlSerialBusSizes[] = 379 { 380 0, 381 ACPI_AML_SIZE_LARGE (AML_RESOURCE_I2C_SERIALBUS), 382 ACPI_AML_SIZE_LARGE (AML_RESOURCE_SPI_SERIALBUS), 383 ACPI_AML_SIZE_LARGE (AML_RESOURCE_UART_SERIALBUS), 384 }; 385 386 387 /* 388 * Resource types, used to validate the resource length field. 389 * The length of fixed-length types must match exactly, variable 390 * lengths must meet the minimum required length, etc. 391 * Zero indicates a reserved (and therefore invalid) resource type. 392 */ 393 static const UINT8 AcpiGbl_ResourceTypes[] = 394 { 395 /* Small descriptors */ 396 397 0, 398 0, 399 0, 400 0, 401 ACPI_SMALL_VARIABLE_LENGTH, /* 04 IRQ */ 402 ACPI_FIXED_LENGTH, /* 05 DMA */ 403 ACPI_SMALL_VARIABLE_LENGTH, /* 06 StartDependentFunctions */ 404 ACPI_FIXED_LENGTH, /* 07 EndDependentFunctions */ 405 ACPI_FIXED_LENGTH, /* 08 IO */ 406 ACPI_FIXED_LENGTH, /* 09 FixedIO */ 407 ACPI_FIXED_LENGTH, /* 0A FixedDMA */ 408 0, 409 0, 410 0, 411 ACPI_VARIABLE_LENGTH, /* 0E VendorShort */ 412 ACPI_FIXED_LENGTH, /* 0F EndTag */ 413 414 /* Large descriptors */ 415 416 0, 417 ACPI_FIXED_LENGTH, /* 01 Memory24 */ 418 ACPI_FIXED_LENGTH, /* 02 GenericRegister */ 419 0, 420 ACPI_VARIABLE_LENGTH, /* 04 VendorLong */ 421 ACPI_FIXED_LENGTH, /* 05 Memory32 */ 422 ACPI_FIXED_LENGTH, /* 06 Memory32Fixed */ 423 ACPI_VARIABLE_LENGTH, /* 07 Dword* address */ 424 ACPI_VARIABLE_LENGTH, /* 08 Word* address */ 425 ACPI_VARIABLE_LENGTH, /* 09 ExtendedIRQ */ 426 ACPI_VARIABLE_LENGTH, /* 0A Qword* address */ 427 ACPI_FIXED_LENGTH, /* 0B Extended* address */ 428 ACPI_VARIABLE_LENGTH, /* 0C Gpio* */ 429 0, 430 ACPI_VARIABLE_LENGTH /* 0E *SerialBus */ 431 }; 432 433 434 /******************************************************************************* 435 * 436 * FUNCTION: AcpiUtWalkAmlResources 437 * 438 * PARAMETERS: WalkState - Current walk info 439 * PARAMETERS: Aml - Pointer to the raw AML resource template 440 * AmlLength - Length of the entire template 441 * UserFunction - Called once for each descriptor found. If 442 * NULL, a pointer to the EndTag is returned 443 * Context - Passed to UserFunction 444 * 445 * RETURN: Status 446 * 447 * DESCRIPTION: Walk a raw AML resource list(buffer). User function called 448 * once for each resource found. 449 * 450 ******************************************************************************/ 451 452 ACPI_STATUS 453 AcpiUtWalkAmlResources ( 454 ACPI_WALK_STATE *WalkState, 455 UINT8 *Aml, 456 ACPI_SIZE AmlLength, 457 ACPI_WALK_AML_CALLBACK UserFunction, 458 void **Context) 459 { 460 ACPI_STATUS Status; 461 UINT8 *EndAml; 462 UINT8 ResourceIndex; 463 UINT32 Length; 464 UINT32 Offset = 0; 465 UINT8 EndTag[2] = {0x79, 0x00}; 466 467 468 ACPI_FUNCTION_TRACE (UtWalkAmlResources); 469 470 471 /* The absolute minimum resource template is one EndTag descriptor */ 472 473 if (AmlLength < sizeof (AML_RESOURCE_END_TAG)) 474 { 475 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 476 } 477 478 /* Point to the end of the resource template buffer */ 479 480 EndAml = Aml + AmlLength; 481 482 /* Walk the byte list, abort on any invalid descriptor type or length */ 483 484 while (Aml < EndAml) 485 { 486 /* Validate the Resource Type and Resource Length */ 487 488 Status = AcpiUtValidateResource (WalkState, Aml, &ResourceIndex); 489 if (ACPI_FAILURE (Status)) 490 { 491 /* 492 * Exit on failure. Cannot continue because the descriptor length 493 * may be bogus also. 494 */ 495 return_ACPI_STATUS (Status); 496 } 497 498 /* Get the length of this descriptor */ 499 500 Length = AcpiUtGetDescriptorLength (Aml); 501 502 /* Invoke the user function */ 503 504 if (UserFunction) 505 { 506 Status = UserFunction (Aml, Length, Offset, ResourceIndex, Context); 507 if (ACPI_FAILURE (Status)) 508 { 509 return_ACPI_STATUS (Status); 510 } 511 } 512 513 /* An EndTag descriptor terminates this resource template */ 514 515 if (AcpiUtGetResourceType (Aml) == ACPI_RESOURCE_NAME_END_TAG) 516 { 517 /* 518 * There must be at least one more byte in the buffer for 519 * the 2nd byte of the EndTag 520 */ 521 if ((Aml + 1) >= EndAml) 522 { 523 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 524 } 525 526 /* Return the pointer to the EndTag if requested */ 527 528 if (!UserFunction) 529 { 530 *Context = Aml; 531 } 532 533 /* Normal exit */ 534 535 return_ACPI_STATUS (AE_OK); 536 } 537 538 Aml += Length; 539 Offset += Length; 540 } 541 542 /* Did not find an EndTag descriptor */ 543 544 if (UserFunction) 545 { 546 /* Insert an EndTag anyway. AcpiRsGetListLength always leaves room */ 547 548 (void) AcpiUtValidateResource (WalkState, EndTag, &ResourceIndex); 549 Status = UserFunction (EndTag, 2, Offset, ResourceIndex, Context); 550 if (ACPI_FAILURE (Status)) 551 { 552 return_ACPI_STATUS (Status); 553 } 554 } 555 556 return_ACPI_STATUS (AE_AML_NO_RESOURCE_END_TAG); 557 } 558 559 560 /******************************************************************************* 561 * 562 * FUNCTION: AcpiUtValidateResource 563 * 564 * PARAMETERS: WalkState - Current walk info 565 * Aml - Pointer to the raw AML resource descriptor 566 * ReturnIndex - Where the resource index is returned. NULL 567 * if the index is not required. 568 * 569 * RETURN: Status, and optionally the Index into the global resource tables 570 * 571 * DESCRIPTION: Validate an AML resource descriptor by checking the Resource 572 * Type and Resource Length. Returns an index into the global 573 * resource information/dispatch tables for later use. 574 * 575 ******************************************************************************/ 576 577 ACPI_STATUS 578 AcpiUtValidateResource ( 579 ACPI_WALK_STATE *WalkState, 580 void *Aml, 581 UINT8 *ReturnIndex) 582 { 583 AML_RESOURCE *AmlResource; 584 UINT8 ResourceType; 585 UINT8 ResourceIndex; 586 ACPI_RS_LENGTH ResourceLength; 587 ACPI_RS_LENGTH MinimumResourceLength; 588 589 590 ACPI_FUNCTION_ENTRY (); 591 592 593 /* 594 * 1) Validate the ResourceType field (Byte 0) 595 */ 596 ResourceType = ACPI_GET8 (Aml); 597 598 /* 599 * Byte 0 contains the descriptor name (Resource Type) 600 * Examine the large/small bit in the resource header 601 */ 602 if (ResourceType & ACPI_RESOURCE_NAME_LARGE) 603 { 604 /* Verify the large resource type (name) against the max */ 605 606 if (ResourceType > ACPI_RESOURCE_NAME_LARGE_MAX) 607 { 608 goto InvalidResource; 609 } 610 611 /* 612 * Large Resource Type -- bits 6:0 contain the name 613 * Translate range 0x80-0x8B to index range 0x10-0x1B 614 */ 615 ResourceIndex = (UINT8) (ResourceType - 0x70); 616 } 617 else 618 { 619 /* 620 * Small Resource Type -- bits 6:3 contain the name 621 * Shift range to index range 0x00-0x0F 622 */ 623 ResourceIndex = (UINT8) 624 ((ResourceType & ACPI_RESOURCE_NAME_SMALL_MASK) >> 3); 625 } 626 627 /* 628 * Check validity of the resource type, via AcpiGbl_ResourceTypes. Zero 629 * indicates an invalid resource. 630 */ 631 if (!AcpiGbl_ResourceTypes[ResourceIndex]) 632 { 633 goto InvalidResource; 634 } 635 636 /* 637 * Validate the ResourceLength field. This ensures that the length 638 * is at least reasonable, and guarantees that it is non-zero. 639 */ 640 ResourceLength = AcpiUtGetResourceLength (Aml); 641 MinimumResourceLength = AcpiGbl_ResourceAmlSizes[ResourceIndex]; 642 643 /* Validate based upon the type of resource - fixed length or variable */ 644 645 switch (AcpiGbl_ResourceTypes[ResourceIndex]) 646 { 647 case ACPI_FIXED_LENGTH: 648 649 /* Fixed length resource, length must match exactly */ 650 651 if (ResourceLength != MinimumResourceLength) 652 { 653 goto BadResourceLength; 654 } 655 break; 656 657 case ACPI_VARIABLE_LENGTH: 658 659 /* Variable length resource, length must be at least the minimum */ 660 661 if (ResourceLength < MinimumResourceLength) 662 { 663 goto BadResourceLength; 664 } 665 break; 666 667 case ACPI_SMALL_VARIABLE_LENGTH: 668 669 /* Small variable length resource, length can be (Min) or (Min-1) */ 670 671 if ((ResourceLength > MinimumResourceLength) || 672 (ResourceLength < (MinimumResourceLength - 1))) 673 { 674 goto BadResourceLength; 675 } 676 break; 677 678 default: 679 680 /* Shouldn't happen (because of validation earlier), but be sure */ 681 682 goto InvalidResource; 683 } 684 685 AmlResource = ACPI_CAST_PTR (AML_RESOURCE, Aml); 686 if (ResourceType == ACPI_RESOURCE_NAME_SERIAL_BUS) 687 { 688 /* Validate the BusType field */ 689 690 if ((AmlResource->CommonSerialBus.Type == 0) || 691 (AmlResource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE)) 692 { 693 if (WalkState) 694 { 695 ACPI_ERROR ((AE_INFO, 696 "Invalid/unsupported SerialBus resource descriptor: BusType 0x%2.2X", 697 AmlResource->CommonSerialBus.Type)); 698 } 699 return (AE_AML_INVALID_RESOURCE_TYPE); 700 } 701 } 702 703 /* Optionally return the resource table index */ 704 705 if (ReturnIndex) 706 { 707 *ReturnIndex = ResourceIndex; 708 } 709 710 return (AE_OK); 711 712 713 InvalidResource: 714 715 if (WalkState) 716 { 717 ACPI_ERROR ((AE_INFO, 718 "Invalid/unsupported resource descriptor: Type 0x%2.2X", 719 ResourceType)); 720 } 721 return (AE_AML_INVALID_RESOURCE_TYPE); 722 723 BadResourceLength: 724 725 if (WalkState) 726 { 727 ACPI_ERROR ((AE_INFO, 728 "Invalid resource descriptor length: Type " 729 "0x%2.2X, Length 0x%4.4X, MinLength 0x%4.4X", 730 ResourceType, ResourceLength, MinimumResourceLength)); 731 } 732 return (AE_AML_BAD_RESOURCE_LENGTH); 733 } 734 735 736 /******************************************************************************* 737 * 738 * FUNCTION: AcpiUtGetResourceType 739 * 740 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor 741 * 742 * RETURN: The Resource Type with no extraneous bits (except the 743 * Large/Small descriptor bit -- this is left alone) 744 * 745 * DESCRIPTION: Extract the Resource Type/Name from the first byte of 746 * a resource descriptor. 747 * 748 ******************************************************************************/ 749 750 UINT8 751 AcpiUtGetResourceType ( 752 void *Aml) 753 { 754 ACPI_FUNCTION_ENTRY (); 755 756 757 /* 758 * Byte 0 contains the descriptor name (Resource Type) 759 * Examine the large/small bit in the resource header 760 */ 761 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE) 762 { 763 /* Large Resource Type -- bits 6:0 contain the name */ 764 765 return (ACPI_GET8 (Aml)); 766 } 767 else 768 { 769 /* Small Resource Type -- bits 6:3 contain the name */ 770 771 return ((UINT8) (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_SMALL_MASK)); 772 } 773 } 774 775 776 /******************************************************************************* 777 * 778 * FUNCTION: AcpiUtGetResourceLength 779 * 780 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor 781 * 782 * RETURN: Byte Length 783 * 784 * DESCRIPTION: Get the "Resource Length" of a raw AML descriptor. By 785 * definition, this does not include the size of the descriptor 786 * header or the length field itself. 787 * 788 ******************************************************************************/ 789 790 UINT16 791 AcpiUtGetResourceLength ( 792 void *Aml) 793 { 794 ACPI_RS_LENGTH ResourceLength; 795 796 797 ACPI_FUNCTION_ENTRY (); 798 799 800 /* 801 * Byte 0 contains the descriptor name (Resource Type) 802 * Examine the large/small bit in the resource header 803 */ 804 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE) 805 { 806 /* Large Resource type -- bytes 1-2 contain the 16-bit length */ 807 808 ACPI_MOVE_16_TO_16 (&ResourceLength, ACPI_ADD_PTR (UINT8, Aml, 1)); 809 810 } 811 else 812 { 813 /* Small Resource type -- bits 2:0 of byte 0 contain the length */ 814 815 ResourceLength = (UINT16) (ACPI_GET8 (Aml) & 816 ACPI_RESOURCE_NAME_SMALL_LENGTH_MASK); 817 } 818 819 return (ResourceLength); 820 } 821 822 823 /******************************************************************************* 824 * 825 * FUNCTION: AcpiUtGetResourceHeaderLength 826 * 827 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor 828 * 829 * RETURN: Length of the AML header (depends on large/small descriptor) 830 * 831 * DESCRIPTION: Get the length of the header for this resource. 832 * 833 ******************************************************************************/ 834 835 UINT8 836 AcpiUtGetResourceHeaderLength ( 837 void *Aml) 838 { 839 ACPI_FUNCTION_ENTRY (); 840 841 842 /* Examine the large/small bit in the resource header */ 843 844 if (ACPI_GET8 (Aml) & ACPI_RESOURCE_NAME_LARGE) 845 { 846 return (sizeof (AML_RESOURCE_LARGE_HEADER)); 847 } 848 else 849 { 850 return (sizeof (AML_RESOURCE_SMALL_HEADER)); 851 } 852 } 853 854 855 /******************************************************************************* 856 * 857 * FUNCTION: AcpiUtGetDescriptorLength 858 * 859 * PARAMETERS: Aml - Pointer to the raw AML resource descriptor 860 * 861 * RETURN: Byte length 862 * 863 * DESCRIPTION: Get the total byte length of a raw AML descriptor, including the 864 * length of the descriptor header and the length field itself. 865 * Used to walk descriptor lists. 866 * 867 ******************************************************************************/ 868 869 UINT32 870 AcpiUtGetDescriptorLength ( 871 void *Aml) 872 { 873 ACPI_FUNCTION_ENTRY (); 874 875 876 /* 877 * Get the Resource Length (does not include header length) and add 878 * the header length (depends on if this is a small or large resource) 879 */ 880 return (AcpiUtGetResourceLength (Aml) + 881 AcpiUtGetResourceHeaderLength (Aml)); 882 } 883 884 885 /******************************************************************************* 886 * 887 * FUNCTION: AcpiUtGetResourceEndTag 888 * 889 * PARAMETERS: ObjDesc - The resource template buffer object 890 * EndTag - Where the pointer to the EndTag is returned 891 * 892 * RETURN: Status, pointer to the end tag 893 * 894 * DESCRIPTION: Find the EndTag resource descriptor in an AML resource template 895 * Note: allows a buffer length of zero. 896 * 897 ******************************************************************************/ 898 899 ACPI_STATUS 900 AcpiUtGetResourceEndTag ( 901 ACPI_OPERAND_OBJECT *ObjDesc, 902 UINT8 **EndTag) 903 { 904 ACPI_STATUS Status; 905 906 907 ACPI_FUNCTION_TRACE (UtGetResourceEndTag); 908 909 910 /* Allow a buffer length of zero */ 911 912 if (!ObjDesc->Buffer.Length) 913 { 914 *EndTag = ObjDesc->Buffer.Pointer; 915 return_ACPI_STATUS (AE_OK); 916 } 917 918 /* Validate the template and get a pointer to the EndTag */ 919 920 Status = AcpiUtWalkAmlResources (NULL, ObjDesc->Buffer.Pointer, 921 ObjDesc->Buffer.Length, NULL, (void **) EndTag); 922 923 return_ACPI_STATUS (Status); 924 } 925