1 /****************************************************************************** 2 * 3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2022, 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 MERCHANTABILITY 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 #ifdef _OBSOLETE_CODE /* Was originally used for Load() operator */ 219 /******************************************************************************* 220 * 221 * FUNCTION: AcpiExOpcode_1A_1T_0R 222 * 223 * PARAMETERS: WalkState - Current state (contains AML opcode) 224 * 225 * RETURN: Status 226 * 227 * DESCRIPTION: Execute opcode with one argument, one target, and no 228 * return value. 229 * 230 ******************************************************************************/ 231 232 ACPI_STATUS 233 AcpiExOpcode_1A_1T_0R ( 234 ACPI_WALK_STATE *WalkState) 235 { 236 ACPI_STATUS Status = AE_OK; 237 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 238 239 240 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R, 241 AcpiPsGetOpcodeName (WalkState->Opcode)); 242 243 244 /* Examine the AML opcode */ 245 246 switch (WalkState->Opcode) 247 { 248 #ifdef _OBSOLETE_CODE 249 case AML_LOAD_OP: 250 251 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState); 252 break; 253 #endif 254 255 default: /* Unknown opcode */ 256 257 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 258 WalkState->Opcode)); 259 Status = AE_AML_BAD_OPCODE; 260 goto Cleanup; 261 } 262 263 264 Cleanup: 265 266 return_ACPI_STATUS (Status); 267 } 268 #endif 269 270 /******************************************************************************* 271 * 272 * FUNCTION: AcpiExOpcode_1A_1T_1R 273 * 274 * PARAMETERS: WalkState - Current state (contains AML opcode) 275 * 276 * RETURN: Status 277 * 278 * DESCRIPTION: Execute opcode with one argument, one target, and a 279 * return value. 280 * January 2022: Added Load operator, with new ACPI 6.4 281 * semantics. 282 * 283 ******************************************************************************/ 284 285 ACPI_STATUS 286 AcpiExOpcode_1A_1T_1R ( 287 ACPI_WALK_STATE *WalkState) 288 { 289 ACPI_STATUS Status = AE_OK; 290 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 291 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 292 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL; 293 UINT32 Temp32; 294 UINT32 i; 295 UINT64 PowerOfTen; 296 UINT64 Digit; 297 298 299 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R, 300 AcpiPsGetOpcodeName (WalkState->Opcode)); 301 302 303 /* Examine the AML opcode */ 304 305 switch (WalkState->Opcode) 306 { 307 case AML_BIT_NOT_OP: 308 case AML_FIND_SET_LEFT_BIT_OP: 309 case AML_FIND_SET_RIGHT_BIT_OP: 310 case AML_FROM_BCD_OP: 311 case AML_LOAD_OP: 312 case AML_TO_BCD_OP: 313 case AML_CONDITIONAL_REF_OF_OP: 314 315 /* Create a return object of type Integer for these opcodes */ 316 317 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 318 if (!ReturnDesc) 319 { 320 Status = AE_NO_MEMORY; 321 goto Cleanup; 322 } 323 324 switch (WalkState->Opcode) 325 { 326 case AML_BIT_NOT_OP: /* Not (Operand, Result) */ 327 328 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value; 329 break; 330 331 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */ 332 333 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 334 335 /* 336 * Acpi specification describes Integer type as a little 337 * endian unsigned value, so this boundary condition is valid. 338 */ 339 for (Temp32 = 0; ReturnDesc->Integer.Value && 340 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 341 { 342 ReturnDesc->Integer.Value >>= 1; 343 } 344 345 ReturnDesc->Integer.Value = Temp32; 346 break; 347 348 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */ 349 350 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 351 352 /* 353 * The Acpi specification describes Integer type as a little 354 * endian unsigned value, so this boundary condition is valid. 355 */ 356 for (Temp32 = 0; ReturnDesc->Integer.Value && 357 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 358 { 359 ReturnDesc->Integer.Value <<= 1; 360 } 361 362 /* Since the bit position is one-based, subtract from 33 (65) */ 363 364 ReturnDesc->Integer.Value = 365 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32; 366 break; 367 368 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */ 369 /* 370 * The 64-bit ACPI integer can hold 16 4-bit BCD characters 371 * (if table is 32-bit, integer can hold 8 BCD characters) 372 * Convert each 4-bit BCD value 373 */ 374 PowerOfTen = 1; 375 ReturnDesc->Integer.Value = 0; 376 Digit = Operand[0]->Integer.Value; 377 378 /* Convert each BCD digit (each is one nybble wide) */ 379 380 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 381 { 382 /* Get the least significant 4-bit BCD digit */ 383 384 Temp32 = ((UINT32) Digit) & 0xF; 385 386 /* Check the range of the digit */ 387 388 if (Temp32 > 9) 389 { 390 ACPI_ERROR ((AE_INFO, 391 "BCD digit too large (not decimal): 0x%X", 392 Temp32)); 393 394 Status = AE_AML_NUMERIC_OVERFLOW; 395 goto Cleanup; 396 } 397 398 /* Sum the digit into the result with the current power of 10 */ 399 400 ReturnDesc->Integer.Value += 401 (((UINT64) Temp32) * PowerOfTen); 402 403 /* Shift to next BCD digit */ 404 405 Digit >>= 4; 406 407 /* Next power of 10 */ 408 409 PowerOfTen *= 10; 410 } 411 break; 412 413 case AML_LOAD_OP: /* Result1 = Load (Operand[0], Result1) */ 414 415 ReturnDesc->Integer.Value = 0; 416 Status = AcpiExLoadOp (Operand[0], ReturnDesc, WalkState); 417 if (ACPI_SUCCESS (Status)) 418 { 419 /* Return -1 (non-zero) indicates success */ 420 421 ReturnDesc->Integer.Value = 0xFFFFFFFFFFFFFFFF; 422 } 423 break; 424 425 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */ 426 427 ReturnDesc->Integer.Value = 0; 428 Digit = Operand[0]->Integer.Value; 429 430 /* Each BCD digit is one nybble wide */ 431 432 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 433 { 434 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32); 435 436 /* 437 * Insert the BCD digit that resides in the 438 * remainder from above 439 */ 440 ReturnDesc->Integer.Value |= 441 (((UINT64) Temp32) << ACPI_MUL_4 (i)); 442 } 443 444 /* Overflow if there is any data left in Digit */ 445 446 if (Digit > 0) 447 { 448 ACPI_ERROR ((AE_INFO, 449 "Integer too large to convert to BCD: 0x%8.8X%8.8X", 450 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value))); 451 Status = AE_AML_NUMERIC_OVERFLOW; 452 goto Cleanup; 453 } 454 break; 455 456 case AML_CONDITIONAL_REF_OF_OP: /* CondRefOf (SourceObject, Result) */ 457 /* 458 * This op is a little strange because the internal return value is 459 * different than the return value stored in the result descriptor 460 * (There are really two return values) 461 */ 462 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode) 463 { 464 /* 465 * This means that the object does not exist in the namespace, 466 * return FALSE 467 */ 468 ReturnDesc->Integer.Value = 0; 469 goto Cleanup; 470 } 471 472 /* Get the object reference, store it, and remove our reference */ 473 474 Status = AcpiExGetObjectReference (Operand[0], 475 &ReturnDesc2, WalkState); 476 if (ACPI_FAILURE (Status)) 477 { 478 goto Cleanup; 479 } 480 481 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState); 482 AcpiUtRemoveReference (ReturnDesc2); 483 484 /* The object exists in the namespace, return TRUE */ 485 486 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 487 goto Cleanup; 488 489 490 default: 491 492 /* No other opcodes get here */ 493 494 break; 495 } 496 break; 497 498 case AML_STORE_OP: /* Store (Source, Target) */ 499 /* 500 * A store operand is typically a number, string, buffer or lvalue 501 * Be careful about deleting the source object, 502 * since the object itself may have been stored. 503 */ 504 Status = AcpiExStore (Operand[0], Operand[1], WalkState); 505 if (ACPI_FAILURE (Status)) 506 { 507 return_ACPI_STATUS (Status); 508 } 509 510 /* It is possible that the Store already produced a return object */ 511 512 if (!WalkState->ResultObj) 513 { 514 /* 515 * Normally, we would remove a reference on the Operand[0] 516 * parameter; But since it is being used as the internal return 517 * object (meaning we would normally increment it), the two 518 * cancel out, and we simply don't do anything. 519 */ 520 WalkState->ResultObj = Operand[0]; 521 WalkState->Operands[0] = NULL; /* Prevent deletion */ 522 } 523 return_ACPI_STATUS (Status); 524 525 /* 526 * ACPI 2.0 Opcodes 527 */ 528 case AML_COPY_OBJECT_OP: /* CopyObject (Source, Target) */ 529 530 Status = AcpiUtCopyIobjectToIobject ( 531 Operand[0], &ReturnDesc, WalkState); 532 break; 533 534 case AML_TO_DECIMAL_STRING_OP: /* ToDecimalString (Data, Result) */ 535 536 Status = AcpiExConvertToString ( 537 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL); 538 if (ReturnDesc == Operand[0]) 539 { 540 /* No conversion performed, add ref to handle return value */ 541 542 AcpiUtAddReference (ReturnDesc); 543 } 544 break; 545 546 case AML_TO_HEX_STRING_OP: /* ToHexString (Data, Result) */ 547 548 Status = AcpiExConvertToString ( 549 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX); 550 if (ReturnDesc == Operand[0]) 551 { 552 /* No conversion performed, add ref to handle return value */ 553 554 AcpiUtAddReference (ReturnDesc); 555 } 556 break; 557 558 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */ 559 560 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc); 561 if (ReturnDesc == Operand[0]) 562 { 563 /* No conversion performed, add ref to handle return value */ 564 565 AcpiUtAddReference (ReturnDesc); 566 } 567 break; 568 569 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */ 570 571 /* Perform "explicit" conversion */ 572 573 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 0); 574 if (ReturnDesc == Operand[0]) 575 { 576 /* No conversion performed, add ref to handle return value */ 577 578 AcpiUtAddReference (ReturnDesc); 579 } 580 break; 581 582 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */ 583 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */ 584 585 /* These are two obsolete opcodes */ 586 587 ACPI_ERROR ((AE_INFO, 588 "%s is obsolete and not implemented", 589 AcpiPsGetOpcodeName (WalkState->Opcode))); 590 Status = AE_SUPPORT; 591 goto Cleanup; 592 593 default: /* Unknown opcode */ 594 595 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 596 WalkState->Opcode)); 597 Status = AE_AML_BAD_OPCODE; 598 goto Cleanup; 599 } 600 601 if (ACPI_SUCCESS (Status)) 602 { 603 /* Store the return value computed above into the target object */ 604 605 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState); 606 } 607 608 609 Cleanup: 610 611 /* Delete return object on error */ 612 613 if (ACPI_FAILURE (Status)) 614 { 615 AcpiUtRemoveReference (ReturnDesc); 616 } 617 618 /* Save return object on success */ 619 620 else if (!WalkState->ResultObj) 621 { 622 WalkState->ResultObj = ReturnDesc; 623 } 624 625 return_ACPI_STATUS (Status); 626 } 627 628 629 /******************************************************************************* 630 * 631 * FUNCTION: AcpiExOpcode_1A_0T_1R 632 * 633 * PARAMETERS: WalkState - Current state (contains AML opcode) 634 * 635 * RETURN: Status 636 * 637 * DESCRIPTION: Execute opcode with one argument, no target, and a return value 638 * 639 ******************************************************************************/ 640 641 ACPI_STATUS 642 AcpiExOpcode_1A_0T_1R ( 643 ACPI_WALK_STATE *WalkState) 644 { 645 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 646 ACPI_OPERAND_OBJECT *TempDesc; 647 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 648 ACPI_STATUS Status = AE_OK; 649 UINT32 Type; 650 UINT64 Value; 651 652 653 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R, 654 AcpiPsGetOpcodeName (WalkState->Opcode)); 655 656 657 /* Examine the AML opcode */ 658 659 switch (WalkState->Opcode) 660 { 661 case AML_LOGICAL_NOT_OP: /* LNot (Operand) */ 662 663 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 664 if (!ReturnDesc) 665 { 666 Status = AE_NO_MEMORY; 667 goto Cleanup; 668 } 669 670 /* 671 * Set result to ONES (TRUE) if Value == 0. Note: 672 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above. 673 */ 674 if (!Operand[0]->Integer.Value) 675 { 676 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 677 } 678 break; 679 680 case AML_DECREMENT_OP: /* Decrement (Operand) */ 681 case AML_INCREMENT_OP: /* Increment (Operand) */ 682 /* 683 * Create a new integer. Can't just get the base integer and 684 * increment it because it may be an Arg or Field. 685 */ 686 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 687 if (!ReturnDesc) 688 { 689 Status = AE_NO_MEMORY; 690 goto Cleanup; 691 } 692 693 /* 694 * Since we are expecting a Reference operand, it can be either a 695 * NS Node or an internal object. 696 */ 697 TempDesc = Operand[0]; 698 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND) 699 { 700 /* Internal reference object - prevent deletion */ 701 702 AcpiUtAddReference (TempDesc); 703 } 704 705 /* 706 * Convert the Reference operand to an Integer (This removes a 707 * reference on the Operand[0] object) 708 * 709 * NOTE: We use LNOT_OP here in order to force resolution of the 710 * reference operand to an actual integer. 711 */ 712 Status = AcpiExResolveOperands (AML_LOGICAL_NOT_OP, 713 &TempDesc, WalkState); 714 if (ACPI_FAILURE (Status)) 715 { 716 ACPI_EXCEPTION ((AE_INFO, Status, 717 "While resolving operands for [%s]", 718 AcpiPsGetOpcodeName (WalkState->Opcode))); 719 720 goto Cleanup; 721 } 722 723 /* 724 * TempDesc is now guaranteed to be an Integer object -- 725 * Perform the actual increment or decrement 726 */ 727 if (WalkState->Opcode == AML_INCREMENT_OP) 728 { 729 ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1; 730 } 731 else 732 { 733 ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1; 734 } 735 736 /* Finished with this Integer object */ 737 738 AcpiUtRemoveReference (TempDesc); 739 740 /* 741 * Store the result back (indirectly) through the original 742 * Reference object 743 */ 744 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState); 745 break; 746 747 case AML_OBJECT_TYPE_OP: /* ObjectType (SourceObject) */ 748 /* 749 * Note: The operand is not resolved at this point because we want to 750 * get the associated object, not its value. For example, we don't 751 * want to resolve a FieldUnit to its value, we want the actual 752 * FieldUnit object. 753 */ 754 755 /* Get the type of the base object */ 756 757 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL); 758 if (ACPI_FAILURE (Status)) 759 { 760 goto Cleanup; 761 } 762 763 /* Allocate a descriptor to hold the type. */ 764 765 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type); 766 if (!ReturnDesc) 767 { 768 Status = AE_NO_MEMORY; 769 goto Cleanup; 770 } 771 break; 772 773 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */ 774 /* 775 * Note: The operand is not resolved at this point because we want to 776 * get the associated object, not its value. 777 */ 778 779 /* Get the base object */ 780 781 Status = AcpiExResolveMultiple ( 782 WalkState, Operand[0], &Type, &TempDesc); 783 if (ACPI_FAILURE (Status)) 784 { 785 goto Cleanup; 786 } 787 788 /* 789 * The type of the base object must be integer, buffer, string, or 790 * package. All others are not supported. 791 * 792 * NOTE: Integer is not specifically supported by the ACPI spec, 793 * but is supported implicitly via implicit operand conversion. 794 * rather than bother with conversion, we just use the byte width 795 * global (4 or 8 bytes). 796 */ 797 switch (Type) 798 { 799 case ACPI_TYPE_INTEGER: 800 801 Value = AcpiGbl_IntegerByteWidth; 802 break; 803 804 case ACPI_TYPE_STRING: 805 806 Value = TempDesc->String.Length; 807 break; 808 809 case ACPI_TYPE_BUFFER: 810 811 /* Buffer arguments may not be evaluated at this point */ 812 813 Status = AcpiDsGetBufferArguments (TempDesc); 814 Value = TempDesc->Buffer.Length; 815 break; 816 817 case ACPI_TYPE_PACKAGE: 818 819 /* Package arguments may not be evaluated at this point */ 820 821 Status = AcpiDsGetPackageArguments (TempDesc); 822 Value = TempDesc->Package.Count; 823 break; 824 825 default: 826 827 ACPI_ERROR ((AE_INFO, 828 "Operand must be Buffer/Integer/String/Package" 829 " - found type %s", 830 AcpiUtGetTypeName (Type))); 831 832 Status = AE_AML_OPERAND_TYPE; 833 goto Cleanup; 834 } 835 836 if (ACPI_FAILURE (Status)) 837 { 838 goto Cleanup; 839 } 840 841 /* 842 * Now that we have the size of the object, create a result 843 * object to hold the value 844 */ 845 ReturnDesc = AcpiUtCreateIntegerObject (Value); 846 if (!ReturnDesc) 847 { 848 Status = AE_NO_MEMORY; 849 goto Cleanup; 850 } 851 break; 852 853 854 case AML_REF_OF_OP: /* RefOf (SourceObject) */ 855 856 Status = AcpiExGetObjectReference ( 857 Operand[0], &ReturnDesc, WalkState); 858 if (ACPI_FAILURE (Status)) 859 { 860 goto Cleanup; 861 } 862 break; 863 864 865 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */ 866 867 /* Check for a method local or argument, or standalone String */ 868 869 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 870 { 871 TempDesc = AcpiNsGetAttachedObject ( 872 (ACPI_NAMESPACE_NODE *) Operand[0]); 873 if (TempDesc && 874 ((TempDesc->Common.Type == ACPI_TYPE_STRING) || 875 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE))) 876 { 877 Operand[0] = TempDesc; 878 AcpiUtAddReference (TempDesc); 879 } 880 else 881 { 882 Status = AE_AML_OPERAND_TYPE; 883 goto Cleanup; 884 } 885 } 886 else 887 { 888 switch ((Operand[0])->Common.Type) 889 { 890 case ACPI_TYPE_LOCAL_REFERENCE: 891 /* 892 * This is a DerefOf (LocalX | ArgX) 893 * 894 * Must resolve/dereference the local/arg reference first 895 */ 896 switch (Operand[0]->Reference.Class) 897 { 898 case ACPI_REFCLASS_LOCAL: 899 case ACPI_REFCLASS_ARG: 900 901 /* Set Operand[0] to the value of the local/arg */ 902 903 Status = AcpiDsMethodDataGetValue ( 904 Operand[0]->Reference.Class, 905 Operand[0]->Reference.Value, 906 WalkState, &TempDesc); 907 if (ACPI_FAILURE (Status)) 908 { 909 goto Cleanup; 910 } 911 912 /* 913 * Delete our reference to the input object and 914 * point to the object just retrieved 915 */ 916 AcpiUtRemoveReference (Operand[0]); 917 Operand[0] = TempDesc; 918 break; 919 920 case ACPI_REFCLASS_REFOF: 921 922 /* Get the object to which the reference refers */ 923 924 TempDesc = Operand[0]->Reference.Object; 925 AcpiUtRemoveReference (Operand[0]); 926 Operand[0] = TempDesc; 927 break; 928 929 default: 930 931 /* Must be an Index op - handled below */ 932 break; 933 } 934 break; 935 936 case ACPI_TYPE_STRING: 937 938 break; 939 940 default: 941 942 Status = AE_AML_OPERAND_TYPE; 943 goto Cleanup; 944 } 945 } 946 947 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED) 948 { 949 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING) 950 { 951 /* 952 * This is a DerefOf (String). The string is a reference 953 * to a named ACPI object. 954 * 955 * 1) Find the owning Node 956 * 2) Dereference the node to an actual object. Could be a 957 * Field, so we need to resolve the node to a value. 958 */ 959 Status = AcpiNsGetNodeUnlocked (WalkState->ScopeInfo->Scope.Node, 960 Operand[0]->String.Pointer, 961 ACPI_NS_SEARCH_PARENT, 962 ACPI_CAST_INDIRECT_PTR ( 963 ACPI_NAMESPACE_NODE, &ReturnDesc)); 964 if (ACPI_FAILURE (Status)) 965 { 966 goto Cleanup; 967 } 968 969 Status = AcpiExResolveNodeToValue ( 970 ACPI_CAST_INDIRECT_PTR ( 971 ACPI_NAMESPACE_NODE, &ReturnDesc), 972 WalkState); 973 goto Cleanup; 974 } 975 } 976 977 /* Operand[0] may have changed from the code above */ 978 979 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 980 { 981 /* 982 * This is a DerefOf (ObjectReference) 983 * Get the actual object from the Node (This is the dereference). 984 * This case may only happen when a LocalX or ArgX is 985 * dereferenced above, or for references to device and 986 * thermal objects. 987 */ 988 switch (((ACPI_NAMESPACE_NODE *) Operand[0])->Type) 989 { 990 case ACPI_TYPE_DEVICE: 991 case ACPI_TYPE_THERMAL: 992 993 /* These types have no node subobject, return the NS node */ 994 995 ReturnDesc = Operand[0]; 996 break; 997 998 default: 999 /* For most types, get the object attached to the node */ 1000 1001 ReturnDesc = AcpiNsGetAttachedObject ( 1002 (ACPI_NAMESPACE_NODE *) Operand[0]); 1003 AcpiUtAddReference (ReturnDesc); 1004 break; 1005 } 1006 } 1007 else 1008 { 1009 /* 1010 * This must be a reference object produced by either the 1011 * Index() or RefOf() operator 1012 */ 1013 switch (Operand[0]->Reference.Class) 1014 { 1015 case ACPI_REFCLASS_INDEX: 1016 /* 1017 * The target type for the Index operator must be 1018 * either a Buffer or a Package 1019 */ 1020 switch (Operand[0]->Reference.TargetType) 1021 { 1022 case ACPI_TYPE_BUFFER_FIELD: 1023 1024 TempDesc = Operand[0]->Reference.Object; 1025 1026 /* 1027 * Create a new object that contains one element of the 1028 * buffer -- the element pointed to by the index. 1029 * 1030 * NOTE: index into a buffer is NOT a pointer to a 1031 * sub-buffer of the main buffer, it is only a pointer to a 1032 * single element (byte) of the buffer! 1033 * 1034 * Since we are returning the value of the buffer at the 1035 * indexed location, we don't need to add an additional 1036 * reference to the buffer itself. 1037 */ 1038 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 1039 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]); 1040 if (!ReturnDesc) 1041 { 1042 Status = AE_NO_MEMORY; 1043 goto Cleanup; 1044 } 1045 break; 1046 1047 case ACPI_TYPE_PACKAGE: 1048 /* 1049 * Return the referenced element of the package. We must 1050 * add another reference to the referenced object, however. 1051 */ 1052 ReturnDesc = *(Operand[0]->Reference.Where); 1053 if (!ReturnDesc) 1054 { 1055 /* 1056 * Element is NULL, do not allow the dereference. 1057 * This provides compatibility with other ACPI 1058 * implementations. 1059 */ 1060 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT); 1061 } 1062 1063 AcpiUtAddReference (ReturnDesc); 1064 break; 1065 1066 default: 1067 1068 ACPI_ERROR ((AE_INFO, 1069 "Unknown Index TargetType 0x%X in reference object %p", 1070 Operand[0]->Reference.TargetType, Operand[0])); 1071 1072 Status = AE_AML_OPERAND_TYPE; 1073 goto Cleanup; 1074 } 1075 break; 1076 1077 case ACPI_REFCLASS_REFOF: 1078 1079 ReturnDesc = Operand[0]->Reference.Object; 1080 1081 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == 1082 ACPI_DESC_TYPE_NAMED) 1083 { 1084 ReturnDesc = AcpiNsGetAttachedObject ( 1085 (ACPI_NAMESPACE_NODE *) ReturnDesc); 1086 if (!ReturnDesc) 1087 { 1088 break; 1089 } 1090 1091 /* 1092 * June 2013: 1093 * BufferFields/FieldUnits require additional resolution 1094 */ 1095 switch (ReturnDesc->Common.Type) 1096 { 1097 case ACPI_TYPE_BUFFER_FIELD: 1098 case ACPI_TYPE_LOCAL_REGION_FIELD: 1099 case ACPI_TYPE_LOCAL_BANK_FIELD: 1100 case ACPI_TYPE_LOCAL_INDEX_FIELD: 1101 1102 Status = AcpiExReadDataFromField ( 1103 WalkState, ReturnDesc, &TempDesc); 1104 if (ACPI_FAILURE (Status)) 1105 { 1106 return_ACPI_STATUS (Status); 1107 } 1108 1109 ReturnDesc = TempDesc; 1110 break; 1111 1112 default: 1113 1114 /* Add another reference to the object */ 1115 1116 AcpiUtAddReference (ReturnDesc); 1117 break; 1118 } 1119 } 1120 break; 1121 1122 default: 1123 1124 ACPI_ERROR ((AE_INFO, 1125 "Unknown class in reference(%p) - 0x%2.2X", 1126 Operand[0], Operand[0]->Reference.Class)); 1127 1128 Status = AE_TYPE; 1129 goto Cleanup; 1130 } 1131 } 1132 break; 1133 1134 default: 1135 1136 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 1137 WalkState->Opcode)); 1138 1139 Status = AE_AML_BAD_OPCODE; 1140 goto Cleanup; 1141 } 1142 1143 1144 Cleanup: 1145 1146 /* Delete return object on error */ 1147 1148 if (ACPI_FAILURE (Status)) 1149 { 1150 AcpiUtRemoveReference (ReturnDesc); 1151 } 1152 1153 /* Save return object on success */ 1154 1155 else 1156 { 1157 WalkState->ResultObj = ReturnDesc; 1158 } 1159 1160 return_ACPI_STATUS (Status); 1161 } 1162