exoparg1.c revision 1.1.1.4.2.1
1 /****************************************************************************** 2 * 3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument 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 "acpi.h" 45 #include "accommon.h" 46 #include "acparser.h" 47 #include "acdispat.h" 48 #include "acinterp.h" 49 #include "amlcode.h" 50 #include "acnamesp.h" 51 52 53 #define _COMPONENT ACPI_EXECUTER 54 ACPI_MODULE_NAME ("exoparg1") 55 56 57 /*! 58 * Naming convention for AML interpreter execution routines. 59 * 60 * The routines that begin execution of AML opcodes are named with a common 61 * convention based upon the number of arguments, the number of target operands, 62 * and whether or not a value is returned: 63 * 64 * AcpiExOpcode_xA_yT_zR 65 * 66 * Where: 67 * 68 * xA - ARGUMENTS: The number of arguments (input operands) that are 69 * required for this opcode type (0 through 6 args). 70 * yT - TARGETS: The number of targets (output operands) that are required 71 * for this opcode type (0, 1, or 2 targets). 72 * zR - RETURN VALUE: Indicates whether this opcode type returns a value 73 * as the function return (0 or 1). 74 * 75 * The AcpiExOpcode* functions are called via the Dispatcher component with 76 * fully resolved operands. 77 !*/ 78 79 /******************************************************************************* 80 * 81 * FUNCTION: AcpiExOpcode_0A_0T_1R 82 * 83 * PARAMETERS: WalkState - Current state (contains AML opcode) 84 * 85 * RETURN: Status 86 * 87 * DESCRIPTION: Execute operator with no operands, one return value 88 * 89 ******************************************************************************/ 90 91 ACPI_STATUS 92 AcpiExOpcode_0A_0T_1R ( 93 ACPI_WALK_STATE *WalkState) 94 { 95 ACPI_STATUS Status = AE_OK; 96 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 97 98 99 ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R, 100 AcpiPsGetOpcodeName (WalkState->Opcode)); 101 102 103 /* Examine the AML opcode */ 104 105 switch (WalkState->Opcode) 106 { 107 case AML_TIMER_OP: /* Timer () */ 108 109 /* Create a return object of type Integer */ 110 111 ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ()); 112 if (!ReturnDesc) 113 { 114 Status = AE_NO_MEMORY; 115 goto Cleanup; 116 } 117 break; 118 119 default: /* Unknown opcode */ 120 121 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 122 WalkState->Opcode)); 123 Status = AE_AML_BAD_OPCODE; 124 break; 125 } 126 127 Cleanup: 128 129 /* Delete return object on error */ 130 131 if ((ACPI_FAILURE (Status)) || WalkState->ResultObj) 132 { 133 AcpiUtRemoveReference (ReturnDesc); 134 WalkState->ResultObj = NULL; 135 } 136 else 137 { 138 /* Save the return value */ 139 140 WalkState->ResultObj = ReturnDesc; 141 } 142 143 return_ACPI_STATUS (Status); 144 } 145 146 147 /******************************************************************************* 148 * 149 * FUNCTION: AcpiExOpcode_1A_0T_0R 150 * 151 * PARAMETERS: WalkState - Current state (contains AML opcode) 152 * 153 * RETURN: Status 154 * 155 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on 156 * object stack 157 * 158 ******************************************************************************/ 159 160 ACPI_STATUS 161 AcpiExOpcode_1A_0T_0R ( 162 ACPI_WALK_STATE *WalkState) 163 { 164 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 165 ACPI_STATUS Status = AE_OK; 166 167 168 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R, 169 AcpiPsGetOpcodeName (WalkState->Opcode)); 170 171 172 /* Examine the AML opcode */ 173 174 switch (WalkState->Opcode) 175 { 176 case AML_RELEASE_OP: /* Release (MutexObject) */ 177 178 Status = AcpiExReleaseMutex (Operand[0], WalkState); 179 break; 180 181 case AML_RESET_OP: /* Reset (EventObject) */ 182 183 Status = AcpiExSystemResetEvent (Operand[0]); 184 break; 185 186 case AML_SIGNAL_OP: /* Signal (EventObject) */ 187 188 Status = AcpiExSystemSignalEvent (Operand[0]); 189 break; 190 191 case AML_SLEEP_OP: /* Sleep (MsecTime) */ 192 193 Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value); 194 break; 195 196 case AML_STALL_OP: /* Stall (UsecTime) */ 197 198 Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value); 199 break; 200 201 case AML_UNLOAD_OP: /* Unload (Handle) */ 202 203 Status = AcpiExUnloadTable (Operand[0]); 204 break; 205 206 default: /* Unknown opcode */ 207 208 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 209 WalkState->Opcode)); 210 Status = AE_AML_BAD_OPCODE; 211 break; 212 } 213 214 return_ACPI_STATUS (Status); 215 } 216 217 218 /******************************************************************************* 219 * 220 * FUNCTION: AcpiExOpcode_1A_1T_0R 221 * 222 * PARAMETERS: WalkState - Current state (contains AML opcode) 223 * 224 * RETURN: Status 225 * 226 * DESCRIPTION: Execute opcode with one argument, one target, and no 227 * return value. 228 * 229 ******************************************************************************/ 230 231 ACPI_STATUS 232 AcpiExOpcode_1A_1T_0R ( 233 ACPI_WALK_STATE *WalkState) 234 { 235 ACPI_STATUS Status = AE_OK; 236 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 237 238 239 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R, 240 AcpiPsGetOpcodeName (WalkState->Opcode)); 241 242 243 /* Examine the AML opcode */ 244 245 switch (WalkState->Opcode) 246 { 247 case AML_LOAD_OP: 248 249 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState); 250 break; 251 252 default: /* Unknown opcode */ 253 254 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 255 WalkState->Opcode)); 256 Status = AE_AML_BAD_OPCODE; 257 goto Cleanup; 258 } 259 260 261 Cleanup: 262 263 return_ACPI_STATUS (Status); 264 } 265 266 267 /******************************************************************************* 268 * 269 * FUNCTION: AcpiExOpcode_1A_1T_1R 270 * 271 * PARAMETERS: WalkState - Current state (contains AML opcode) 272 * 273 * RETURN: Status 274 * 275 * DESCRIPTION: Execute opcode with one argument, one target, and a 276 * return value. 277 * 278 ******************************************************************************/ 279 280 ACPI_STATUS 281 AcpiExOpcode_1A_1T_1R ( 282 ACPI_WALK_STATE *WalkState) 283 { 284 ACPI_STATUS Status = AE_OK; 285 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 286 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 287 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL; 288 UINT32 Temp32; 289 UINT32 i; 290 UINT64 PowerOfTen; 291 UINT64 Digit; 292 293 294 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R, 295 AcpiPsGetOpcodeName (WalkState->Opcode)); 296 297 298 /* Examine the AML opcode */ 299 300 switch (WalkState->Opcode) 301 { 302 case AML_BIT_NOT_OP: 303 case AML_FIND_SET_LEFT_BIT_OP: 304 case AML_FIND_SET_RIGHT_BIT_OP: 305 case AML_FROM_BCD_OP: 306 case AML_TO_BCD_OP: 307 case AML_COND_REF_OF_OP: 308 309 /* Create a return object of type Integer for these opcodes */ 310 311 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 312 if (!ReturnDesc) 313 { 314 Status = AE_NO_MEMORY; 315 goto Cleanup; 316 } 317 318 switch (WalkState->Opcode) 319 { 320 case AML_BIT_NOT_OP: /* Not (Operand, Result) */ 321 322 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value; 323 break; 324 325 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */ 326 327 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 328 329 /* 330 * Acpi specification describes Integer type as a little 331 * endian unsigned value, so this boundary condition is valid. 332 */ 333 for (Temp32 = 0; ReturnDesc->Integer.Value && 334 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 335 { 336 ReturnDesc->Integer.Value >>= 1; 337 } 338 339 ReturnDesc->Integer.Value = Temp32; 340 break; 341 342 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */ 343 344 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 345 346 /* 347 * The Acpi specification describes Integer type as a little 348 * endian unsigned value, so this boundary condition is valid. 349 */ 350 for (Temp32 = 0; ReturnDesc->Integer.Value && 351 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 352 { 353 ReturnDesc->Integer.Value <<= 1; 354 } 355 356 /* Since the bit position is one-based, subtract from 33 (65) */ 357 358 ReturnDesc->Integer.Value = 359 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32; 360 break; 361 362 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */ 363 /* 364 * The 64-bit ACPI integer can hold 16 4-bit BCD characters 365 * (if table is 32-bit, integer can hold 8 BCD characters) 366 * Convert each 4-bit BCD value 367 */ 368 PowerOfTen = 1; 369 ReturnDesc->Integer.Value = 0; 370 Digit = Operand[0]->Integer.Value; 371 372 /* Convert each BCD digit (each is one nybble wide) */ 373 374 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 375 { 376 /* Get the least significant 4-bit BCD digit */ 377 378 Temp32 = ((UINT32) Digit) & 0xF; 379 380 /* Check the range of the digit */ 381 382 if (Temp32 > 9) 383 { 384 ACPI_ERROR ((AE_INFO, 385 "BCD digit too large (not decimal): 0x%X", 386 Temp32)); 387 388 Status = AE_AML_NUMERIC_OVERFLOW; 389 goto Cleanup; 390 } 391 392 /* Sum the digit into the result with the current power of 10 */ 393 394 ReturnDesc->Integer.Value += 395 (((UINT64) Temp32) * PowerOfTen); 396 397 /* Shift to next BCD digit */ 398 399 Digit >>= 4; 400 401 /* Next power of 10 */ 402 403 PowerOfTen *= 10; 404 } 405 break; 406 407 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */ 408 409 ReturnDesc->Integer.Value = 0; 410 Digit = Operand[0]->Integer.Value; 411 412 /* Each BCD digit is one nybble wide */ 413 414 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 415 { 416 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32); 417 418 /* 419 * Insert the BCD digit that resides in the 420 * remainder from above 421 */ 422 ReturnDesc->Integer.Value |= 423 (((UINT64) Temp32) << ACPI_MUL_4 (i)); 424 } 425 426 /* Overflow if there is any data left in Digit */ 427 428 if (Digit > 0) 429 { 430 ACPI_ERROR ((AE_INFO, 431 "Integer too large to convert to BCD: 0x%8.8X%8.8X", 432 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value))); 433 Status = AE_AML_NUMERIC_OVERFLOW; 434 goto Cleanup; 435 } 436 break; 437 438 case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */ 439 /* 440 * This op is a little strange because the internal return value is 441 * different than the return value stored in the result descriptor 442 * (There are really two return values) 443 */ 444 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode) 445 { 446 /* 447 * This means that the object does not exist in the namespace, 448 * return FALSE 449 */ 450 ReturnDesc->Integer.Value = 0; 451 goto Cleanup; 452 } 453 454 /* Get the object reference, store it, and remove our reference */ 455 456 Status = AcpiExGetObjectReference (Operand[0], 457 &ReturnDesc2, WalkState); 458 if (ACPI_FAILURE (Status)) 459 { 460 goto Cleanup; 461 } 462 463 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState); 464 AcpiUtRemoveReference (ReturnDesc2); 465 466 /* The object exists in the namespace, return TRUE */ 467 468 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 469 goto Cleanup; 470 471 472 default: 473 474 /* No other opcodes get here */ 475 476 break; 477 } 478 break; 479 480 case AML_STORE_OP: /* Store (Source, Target) */ 481 /* 482 * A store operand is typically a number, string, buffer or lvalue 483 * Be careful about deleting the source object, 484 * since the object itself may have been stored. 485 */ 486 Status = AcpiExStore (Operand[0], Operand[1], WalkState); 487 if (ACPI_FAILURE (Status)) 488 { 489 return_ACPI_STATUS (Status); 490 } 491 492 /* It is possible that the Store already produced a return object */ 493 494 if (!WalkState->ResultObj) 495 { 496 /* 497 * Normally, we would remove a reference on the Operand[0] 498 * parameter; But since it is being used as the internal return 499 * object (meaning we would normally increment it), the two 500 * cancel out, and we simply don't do anything. 501 */ 502 WalkState->ResultObj = Operand[0]; 503 WalkState->Operands[0] = NULL; /* Prevent deletion */ 504 } 505 return_ACPI_STATUS (Status); 506 507 /* 508 * ACPI 2.0 Opcodes 509 */ 510 case AML_COPY_OP: /* Copy (Source, Target) */ 511 512 Status = AcpiUtCopyIobjectToIobject (Operand[0], &ReturnDesc, 513 WalkState); 514 break; 515 516 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */ 517 518 Status = AcpiExConvertToString (Operand[0], &ReturnDesc, 519 ACPI_EXPLICIT_CONVERT_DECIMAL); 520 if (ReturnDesc == Operand[0]) 521 { 522 /* No conversion performed, add ref to handle return value */ 523 AcpiUtAddReference (ReturnDesc); 524 } 525 break; 526 527 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */ 528 529 Status = AcpiExConvertToString (Operand[0], &ReturnDesc, 530 ACPI_EXPLICIT_CONVERT_HEX); 531 if (ReturnDesc == Operand[0]) 532 { 533 /* No conversion performed, add ref to handle return value */ 534 AcpiUtAddReference (ReturnDesc); 535 } 536 break; 537 538 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */ 539 540 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc); 541 if (ReturnDesc == Operand[0]) 542 { 543 /* No conversion performed, add ref to handle return value */ 544 AcpiUtAddReference (ReturnDesc); 545 } 546 break; 547 548 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */ 549 550 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 551 ACPI_ANY_BASE); 552 if (ReturnDesc == Operand[0]) 553 { 554 /* No conversion performed, add ref to handle return value */ 555 AcpiUtAddReference (ReturnDesc); 556 } 557 break; 558 559 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */ 560 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */ 561 562 /* These are two obsolete opcodes */ 563 564 ACPI_ERROR ((AE_INFO, 565 "%s is obsolete and not implemented", 566 AcpiPsGetOpcodeName (WalkState->Opcode))); 567 Status = AE_SUPPORT; 568 goto Cleanup; 569 570 default: /* Unknown opcode */ 571 572 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 573 WalkState->Opcode)); 574 Status = AE_AML_BAD_OPCODE; 575 goto Cleanup; 576 } 577 578 if (ACPI_SUCCESS (Status)) 579 { 580 /* Store the return value computed above into the target object */ 581 582 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState); 583 } 584 585 586 Cleanup: 587 588 /* Delete return object on error */ 589 590 if (ACPI_FAILURE (Status)) 591 { 592 AcpiUtRemoveReference (ReturnDesc); 593 } 594 595 /* Save return object on success */ 596 597 else if (!WalkState->ResultObj) 598 { 599 WalkState->ResultObj = ReturnDesc; 600 } 601 602 return_ACPI_STATUS (Status); 603 } 604 605 606 /******************************************************************************* 607 * 608 * FUNCTION: AcpiExOpcode_1A_0T_1R 609 * 610 * PARAMETERS: WalkState - Current state (contains AML opcode) 611 * 612 * RETURN: Status 613 * 614 * DESCRIPTION: Execute opcode with one argument, no target, and a return value 615 * 616 ******************************************************************************/ 617 618 ACPI_STATUS 619 AcpiExOpcode_1A_0T_1R ( 620 ACPI_WALK_STATE *WalkState) 621 { 622 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 623 ACPI_OPERAND_OBJECT *TempDesc; 624 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 625 ACPI_STATUS Status = AE_OK; 626 UINT32 Type; 627 UINT64 Value; 628 629 630 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R, 631 AcpiPsGetOpcodeName (WalkState->Opcode)); 632 633 634 /* Examine the AML opcode */ 635 636 switch (WalkState->Opcode) 637 { 638 case AML_LNOT_OP: /* LNot (Operand) */ 639 640 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 641 if (!ReturnDesc) 642 { 643 Status = AE_NO_MEMORY; 644 goto Cleanup; 645 } 646 647 /* 648 * Set result to ONES (TRUE) if Value == 0. Note: 649 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above. 650 */ 651 if (!Operand[0]->Integer.Value) 652 { 653 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 654 } 655 break; 656 657 case AML_DECREMENT_OP: /* Decrement (Operand) */ 658 case AML_INCREMENT_OP: /* Increment (Operand) */ 659 /* 660 * Create a new integer. Can't just get the base integer and 661 * increment it because it may be an Arg or Field. 662 */ 663 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 664 if (!ReturnDesc) 665 { 666 Status = AE_NO_MEMORY; 667 goto Cleanup; 668 } 669 670 /* 671 * Since we are expecting a Reference operand, it can be either a 672 * NS Node or an internal object. 673 */ 674 TempDesc = Operand[0]; 675 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND) 676 { 677 /* Internal reference object - prevent deletion */ 678 679 AcpiUtAddReference (TempDesc); 680 } 681 682 /* 683 * Convert the Reference operand to an Integer (This removes a 684 * reference on the Operand[0] object) 685 * 686 * NOTE: We use LNOT_OP here in order to force resolution of the 687 * reference operand to an actual integer. 688 */ 689 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState); 690 if (ACPI_FAILURE (Status)) 691 { 692 ACPI_EXCEPTION ((AE_INFO, Status, 693 "While resolving operands for [%s]", 694 AcpiPsGetOpcodeName (WalkState->Opcode))); 695 696 goto Cleanup; 697 } 698 699 /* 700 * TempDesc is now guaranteed to be an Integer object -- 701 * Perform the actual increment or decrement 702 */ 703 if (WalkState->Opcode == AML_INCREMENT_OP) 704 { 705 ReturnDesc->Integer.Value = TempDesc->Integer.Value +1; 706 } 707 else 708 { 709 ReturnDesc->Integer.Value = TempDesc->Integer.Value -1; 710 } 711 712 /* Finished with this Integer object */ 713 714 AcpiUtRemoveReference (TempDesc); 715 716 /* 717 * Store the result back (indirectly) through the original 718 * Reference object 719 */ 720 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState); 721 break; 722 723 case AML_TYPE_OP: /* ObjectType (SourceObject) */ 724 /* 725 * Note: The operand is not resolved at this point because we want to 726 * get the associated object, not its value. For example, we don't 727 * want to resolve a FieldUnit to its value, we want the actual 728 * FieldUnit object. 729 */ 730 731 /* Get the type of the base object */ 732 733 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL); 734 if (ACPI_FAILURE (Status)) 735 { 736 goto Cleanup; 737 } 738 739 /* Allocate a descriptor to hold the type. */ 740 741 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type); 742 if (!ReturnDesc) 743 { 744 Status = AE_NO_MEMORY; 745 goto Cleanup; 746 } 747 break; 748 749 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */ 750 /* 751 * Note: The operand is not resolved at this point because we want to 752 * get the associated object, not its value. 753 */ 754 755 /* Get the base object */ 756 757 Status = AcpiExResolveMultiple (WalkState, 758 Operand[0], &Type, &TempDesc); 759 if (ACPI_FAILURE (Status)) 760 { 761 goto Cleanup; 762 } 763 764 /* 765 * The type of the base object must be integer, buffer, string, or 766 * package. All others are not supported. 767 * 768 * NOTE: Integer is not specifically supported by the ACPI spec, 769 * but is supported implicitly via implicit operand conversion. 770 * rather than bother with conversion, we just use the byte width 771 * global (4 or 8 bytes). 772 */ 773 switch (Type) 774 { 775 case ACPI_TYPE_INTEGER: 776 777 Value = AcpiGbl_IntegerByteWidth; 778 break; 779 780 case ACPI_TYPE_STRING: 781 782 Value = TempDesc->String.Length; 783 break; 784 785 case ACPI_TYPE_BUFFER: 786 787 /* Buffer arguments may not be evaluated at this point */ 788 789 Status = AcpiDsGetBufferArguments (TempDesc); 790 Value = TempDesc->Buffer.Length; 791 break; 792 793 case ACPI_TYPE_PACKAGE: 794 795 /* Package arguments may not be evaluated at this point */ 796 797 Status = AcpiDsGetPackageArguments (TempDesc); 798 Value = TempDesc->Package.Count; 799 break; 800 801 default: 802 803 ACPI_ERROR ((AE_INFO, 804 "Operand must be Buffer/Integer/String/Package - found type %s", 805 AcpiUtGetTypeName (Type))); 806 Status = AE_AML_OPERAND_TYPE; 807 goto Cleanup; 808 } 809 810 if (ACPI_FAILURE (Status)) 811 { 812 goto Cleanup; 813 } 814 815 /* 816 * Now that we have the size of the object, create a result 817 * object to hold the value 818 */ 819 ReturnDesc = AcpiUtCreateIntegerObject (Value); 820 if (!ReturnDesc) 821 { 822 Status = AE_NO_MEMORY; 823 goto Cleanup; 824 } 825 break; 826 827 828 case AML_REF_OF_OP: /* RefOf (SourceObject) */ 829 830 Status = AcpiExGetObjectReference (Operand[0], &ReturnDesc, WalkState); 831 if (ACPI_FAILURE (Status)) 832 { 833 goto Cleanup; 834 } 835 break; 836 837 838 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */ 839 840 /* Check for a method local or argument, or standalone String */ 841 842 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 843 { 844 TempDesc = AcpiNsGetAttachedObject ( 845 (ACPI_NAMESPACE_NODE *) Operand[0]); 846 if (TempDesc && 847 ((TempDesc->Common.Type == ACPI_TYPE_STRING) || 848 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE))) 849 { 850 Operand[0] = TempDesc; 851 AcpiUtAddReference (TempDesc); 852 } 853 else 854 { 855 Status = AE_AML_OPERAND_TYPE; 856 goto Cleanup; 857 } 858 } 859 else 860 { 861 switch ((Operand[0])->Common.Type) 862 { 863 case ACPI_TYPE_LOCAL_REFERENCE: 864 /* 865 * This is a DerefOf (LocalX | ArgX) 866 * 867 * Must resolve/dereference the local/arg reference first 868 */ 869 switch (Operand[0]->Reference.Class) 870 { 871 case ACPI_REFCLASS_LOCAL: 872 case ACPI_REFCLASS_ARG: 873 874 /* Set Operand[0] to the value of the local/arg */ 875 876 Status = AcpiDsMethodDataGetValue ( 877 Operand[0]->Reference.Class, 878 Operand[0]->Reference.Value, 879 WalkState, &TempDesc); 880 if (ACPI_FAILURE (Status)) 881 { 882 goto Cleanup; 883 } 884 885 /* 886 * Delete our reference to the input object and 887 * point to the object just retrieved 888 */ 889 AcpiUtRemoveReference (Operand[0]); 890 Operand[0] = TempDesc; 891 break; 892 893 case ACPI_REFCLASS_REFOF: 894 895 /* Get the object to which the reference refers */ 896 897 TempDesc = Operand[0]->Reference.Object; 898 AcpiUtRemoveReference (Operand[0]); 899 Operand[0] = TempDesc; 900 break; 901 902 default: 903 904 /* Must be an Index op - handled below */ 905 break; 906 } 907 break; 908 909 case ACPI_TYPE_STRING: 910 911 break; 912 913 default: 914 915 Status = AE_AML_OPERAND_TYPE; 916 goto Cleanup; 917 } 918 } 919 920 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED) 921 { 922 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING) 923 { 924 /* 925 * This is a DerefOf (String). The string is a reference 926 * to a named ACPI object. 927 * 928 * 1) Find the owning Node 929 * 2) Dereference the node to an actual object. Could be a 930 * Field, so we need to resolve the node to a value. 931 */ 932 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node, 933 Operand[0]->String.Pointer, 934 ACPI_NS_SEARCH_PARENT, 935 ACPI_CAST_INDIRECT_PTR ( 936 ACPI_NAMESPACE_NODE, &ReturnDesc)); 937 if (ACPI_FAILURE (Status)) 938 { 939 goto Cleanup; 940 } 941 942 Status = AcpiExResolveNodeToValue ( 943 ACPI_CAST_INDIRECT_PTR ( 944 ACPI_NAMESPACE_NODE, &ReturnDesc), 945 WalkState); 946 goto Cleanup; 947 } 948 } 949 950 /* Operand[0] may have changed from the code above */ 951 952 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 953 { 954 /* 955 * This is a DerefOf (ObjectReference) 956 * Get the actual object from the Node (This is the dereference). 957 * This case may only happen when a LocalX or ArgX is 958 * dereferenced above. 959 */ 960 ReturnDesc = AcpiNsGetAttachedObject ( 961 (ACPI_NAMESPACE_NODE *) Operand[0]); 962 AcpiUtAddReference (ReturnDesc); 963 } 964 else 965 { 966 /* 967 * This must be a reference object produced by either the 968 * Index() or RefOf() operator 969 */ 970 switch (Operand[0]->Reference.Class) 971 { 972 case ACPI_REFCLASS_INDEX: 973 /* 974 * The target type for the Index operator must be 975 * either a Buffer or a Package 976 */ 977 switch (Operand[0]->Reference.TargetType) 978 { 979 case ACPI_TYPE_BUFFER_FIELD: 980 981 TempDesc = Operand[0]->Reference.Object; 982 983 /* 984 * Create a new object that contains one element of the 985 * buffer -- the element pointed to by the index. 986 * 987 * NOTE: index into a buffer is NOT a pointer to a 988 * sub-buffer of the main buffer, it is only a pointer to a 989 * single element (byte) of the buffer! 990 * 991 * Since we are returning the value of the buffer at the 992 * indexed location, we don't need to add an additional 993 * reference to the buffer itself. 994 */ 995 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 996 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]); 997 if (!ReturnDesc) 998 { 999 Status = AE_NO_MEMORY; 1000 goto Cleanup; 1001 } 1002 break; 1003 1004 case ACPI_TYPE_PACKAGE: 1005 /* 1006 * Return the referenced element of the package. We must 1007 * add another reference to the referenced object, however. 1008 */ 1009 ReturnDesc = *(Operand[0]->Reference.Where); 1010 if (!ReturnDesc) 1011 { 1012 /* 1013 * Element is NULL, do not allow the dereference. 1014 * This provides compatibility with other ACPI 1015 * implementations. 1016 */ 1017 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT); 1018 } 1019 1020 AcpiUtAddReference (ReturnDesc); 1021 break; 1022 1023 default: 1024 1025 ACPI_ERROR ((AE_INFO, 1026 "Unknown Index TargetType 0x%X in reference object %p", 1027 Operand[0]->Reference.TargetType, Operand[0])); 1028 Status = AE_AML_OPERAND_TYPE; 1029 goto Cleanup; 1030 } 1031 break; 1032 1033 case ACPI_REFCLASS_REFOF: 1034 1035 ReturnDesc = Operand[0]->Reference.Object; 1036 1037 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == 1038 ACPI_DESC_TYPE_NAMED) 1039 { 1040 ReturnDesc = AcpiNsGetAttachedObject ( 1041 (ACPI_NAMESPACE_NODE *) ReturnDesc); 1042 if (!ReturnDesc) 1043 { 1044 break; 1045 } 1046 1047 /* 1048 * June 2013: 1049 * BufferFields/FieldUnits require additional resolution 1050 */ 1051 switch (ReturnDesc->Common.Type) 1052 { 1053 case ACPI_TYPE_BUFFER_FIELD: 1054 case ACPI_TYPE_LOCAL_REGION_FIELD: 1055 case ACPI_TYPE_LOCAL_BANK_FIELD: 1056 case ACPI_TYPE_LOCAL_INDEX_FIELD: 1057 1058 Status = AcpiExReadDataFromField (WalkState, 1059 ReturnDesc, &TempDesc); 1060 if (ACPI_FAILURE (Status)) 1061 { 1062 goto Cleanup; 1063 } 1064 1065 ReturnDesc = TempDesc; 1066 break; 1067 1068 default: 1069 1070 /* Add another reference to the object */ 1071 1072 AcpiUtAddReference (ReturnDesc); 1073 break; 1074 } 1075 } 1076 break; 1077 1078 default: 1079 1080 ACPI_ERROR ((AE_INFO, 1081 "Unknown class in reference(%p) - 0x%2.2X", 1082 Operand[0], Operand[0]->Reference.Class)); 1083 1084 Status = AE_TYPE; 1085 goto Cleanup; 1086 } 1087 } 1088 break; 1089 1090 default: 1091 1092 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 1093 WalkState->Opcode)); 1094 Status = AE_AML_BAD_OPCODE; 1095 goto Cleanup; 1096 } 1097 1098 1099 Cleanup: 1100 1101 /* Delete return object on error */ 1102 1103 if (ACPI_FAILURE (Status)) 1104 { 1105 AcpiUtRemoveReference (ReturnDesc); 1106 } 1107 1108 /* Save return object on success */ 1109 1110 else 1111 { 1112 WalkState->ResultObj = ReturnDesc; 1113 } 1114 1115 return_ACPI_STATUS (Status); 1116 } 1117
Indexes created Sun Oct 19 02:09:48 GMT 2025