1 /****************************************************************************** 2 * 3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 ( 513 Operand[0], &ReturnDesc, WalkState); 514 break; 515 516 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */ 517 518 Status = AcpiExConvertToString ( 519 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL); 520 if (ReturnDesc == Operand[0]) 521 { 522 /* No conversion performed, add ref to handle return value */ 523 524 AcpiUtAddReference (ReturnDesc); 525 } 526 break; 527 528 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */ 529 530 Status = AcpiExConvertToString ( 531 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX); 532 if (ReturnDesc == Operand[0]) 533 { 534 /* No conversion performed, add ref to handle return value */ 535 536 AcpiUtAddReference (ReturnDesc); 537 } 538 break; 539 540 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */ 541 542 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc); 543 if (ReturnDesc == Operand[0]) 544 { 545 /* No conversion performed, add ref to handle return value */ 546 547 AcpiUtAddReference (ReturnDesc); 548 } 549 break; 550 551 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */ 552 553 Status = AcpiExConvertToInteger ( 554 Operand[0], &ReturnDesc, ACPI_ANY_BASE); 555 if (ReturnDesc == Operand[0]) 556 { 557 /* No conversion performed, add ref to handle return value */ 558 559 AcpiUtAddReference (ReturnDesc); 560 } 561 break; 562 563 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */ 564 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */ 565 566 /* These are two obsolete opcodes */ 567 568 ACPI_ERROR ((AE_INFO, 569 "%s is obsolete and not implemented", 570 AcpiPsGetOpcodeName (WalkState->Opcode))); 571 Status = AE_SUPPORT; 572 goto Cleanup; 573 574 default: /* Unknown opcode */ 575 576 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 577 WalkState->Opcode)); 578 Status = AE_AML_BAD_OPCODE; 579 goto Cleanup; 580 } 581 582 if (ACPI_SUCCESS (Status)) 583 { 584 /* Store the return value computed above into the target object */ 585 586 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState); 587 } 588 589 590 Cleanup: 591 592 /* Delete return object on error */ 593 594 if (ACPI_FAILURE (Status)) 595 { 596 AcpiUtRemoveReference (ReturnDesc); 597 } 598 599 /* Save return object on success */ 600 601 else if (!WalkState->ResultObj) 602 { 603 WalkState->ResultObj = ReturnDesc; 604 } 605 606 return_ACPI_STATUS (Status); 607 } 608 609 610 /******************************************************************************* 611 * 612 * FUNCTION: AcpiExOpcode_1A_0T_1R 613 * 614 * PARAMETERS: WalkState - Current state (contains AML opcode) 615 * 616 * RETURN: Status 617 * 618 * DESCRIPTION: Execute opcode with one argument, no target, and a return value 619 * 620 ******************************************************************************/ 621 622 ACPI_STATUS 623 AcpiExOpcode_1A_0T_1R ( 624 ACPI_WALK_STATE *WalkState) 625 { 626 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 627 ACPI_OPERAND_OBJECT *TempDesc; 628 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 629 ACPI_STATUS Status = AE_OK; 630 UINT32 Type; 631 UINT64 Value; 632 633 634 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R, 635 AcpiPsGetOpcodeName (WalkState->Opcode)); 636 637 638 /* Examine the AML opcode */ 639 640 switch (WalkState->Opcode) 641 { 642 case AML_LNOT_OP: /* LNot (Operand) */ 643 644 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 645 if (!ReturnDesc) 646 { 647 Status = AE_NO_MEMORY; 648 goto Cleanup; 649 } 650 651 /* 652 * Set result to ONES (TRUE) if Value == 0. Note: 653 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above. 654 */ 655 if (!Operand[0]->Integer.Value) 656 { 657 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 658 } 659 break; 660 661 case AML_DECREMENT_OP: /* Decrement (Operand) */ 662 case AML_INCREMENT_OP: /* Increment (Operand) */ 663 /* 664 * Create a new integer. Can't just get the base integer and 665 * increment it because it may be an Arg or Field. 666 */ 667 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 668 if (!ReturnDesc) 669 { 670 Status = AE_NO_MEMORY; 671 goto Cleanup; 672 } 673 674 /* 675 * Since we are expecting a Reference operand, it can be either a 676 * NS Node or an internal object. 677 */ 678 TempDesc = Operand[0]; 679 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND) 680 { 681 /* Internal reference object - prevent deletion */ 682 683 AcpiUtAddReference (TempDesc); 684 } 685 686 /* 687 * Convert the Reference operand to an Integer (This removes a 688 * reference on the Operand[0] object) 689 * 690 * NOTE: We use LNOT_OP here in order to force resolution of the 691 * reference operand to an actual integer. 692 */ 693 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState); 694 if (ACPI_FAILURE (Status)) 695 { 696 ACPI_EXCEPTION ((AE_INFO, Status, 697 "While resolving operands for [%s]", 698 AcpiPsGetOpcodeName (WalkState->Opcode))); 699 700 goto Cleanup; 701 } 702 703 /* 704 * TempDesc is now guaranteed to be an Integer object -- 705 * Perform the actual increment or decrement 706 */ 707 if (WalkState->Opcode == AML_INCREMENT_OP) 708 { 709 ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1; 710 } 711 else 712 { 713 ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1; 714 } 715 716 /* Finished with this Integer object */ 717 718 AcpiUtRemoveReference (TempDesc); 719 720 /* 721 * Store the result back (indirectly) through the original 722 * Reference object 723 */ 724 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState); 725 break; 726 727 case AML_OBJECT_TYPE_OP: /* ObjectType (SourceObject) */ 728 /* 729 * Note: The operand is not resolved at this point because we want to 730 * get the associated object, not its value. For example, we don't 731 * want to resolve a FieldUnit to its value, we want the actual 732 * FieldUnit object. 733 */ 734 735 /* Get the type of the base object */ 736 737 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL); 738 if (ACPI_FAILURE (Status)) 739 { 740 goto Cleanup; 741 } 742 743 /* Allocate a descriptor to hold the type. */ 744 745 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type); 746 if (!ReturnDesc) 747 { 748 Status = AE_NO_MEMORY; 749 goto Cleanup; 750 } 751 break; 752 753 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */ 754 /* 755 * Note: The operand is not resolved at this point because we want to 756 * get the associated object, not its value. 757 */ 758 759 /* Get the base object */ 760 761 Status = AcpiExResolveMultiple ( 762 WalkState, Operand[0], &Type, &TempDesc); 763 if (ACPI_FAILURE (Status)) 764 { 765 goto Cleanup; 766 } 767 768 /* 769 * The type of the base object must be integer, buffer, string, or 770 * package. All others are not supported. 771 * 772 * NOTE: Integer is not specifically supported by the ACPI spec, 773 * but is supported implicitly via implicit operand conversion. 774 * rather than bother with conversion, we just use the byte width 775 * global (4 or 8 bytes). 776 */ 777 switch (Type) 778 { 779 case ACPI_TYPE_INTEGER: 780 781 Value = AcpiGbl_IntegerByteWidth; 782 break; 783 784 case ACPI_TYPE_STRING: 785 786 Value = TempDesc->String.Length; 787 break; 788 789 case ACPI_TYPE_BUFFER: 790 791 /* Buffer arguments may not be evaluated at this point */ 792 793 Status = AcpiDsGetBufferArguments (TempDesc); 794 Value = TempDesc->Buffer.Length; 795 break; 796 797 case ACPI_TYPE_PACKAGE: 798 799 /* Package arguments may not be evaluated at this point */ 800 801 Status = AcpiDsGetPackageArguments (TempDesc); 802 Value = TempDesc->Package.Count; 803 break; 804 805 default: 806 807 ACPI_ERROR ((AE_INFO, 808 "Operand must be Buffer/Integer/String/Package" 809 " - found type %s", 810 AcpiUtGetTypeName (Type))); 811 812 Status = AE_AML_OPERAND_TYPE; 813 goto Cleanup; 814 } 815 816 if (ACPI_FAILURE (Status)) 817 { 818 goto Cleanup; 819 } 820 821 /* 822 * Now that we have the size of the object, create a result 823 * object to hold the value 824 */ 825 ReturnDesc = AcpiUtCreateIntegerObject (Value); 826 if (!ReturnDesc) 827 { 828 Status = AE_NO_MEMORY; 829 goto Cleanup; 830 } 831 break; 832 833 834 case AML_REF_OF_OP: /* RefOf (SourceObject) */ 835 836 Status = AcpiExGetObjectReference ( 837 Operand[0], &ReturnDesc, WalkState); 838 if (ACPI_FAILURE (Status)) 839 { 840 goto Cleanup; 841 } 842 break; 843 844 845 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */ 846 847 /* Check for a method local or argument, or standalone String */ 848 849 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 850 { 851 TempDesc = AcpiNsGetAttachedObject ( 852 (ACPI_NAMESPACE_NODE *) Operand[0]); 853 if (TempDesc && 854 ((TempDesc->Common.Type == ACPI_TYPE_STRING) || 855 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE))) 856 { 857 Operand[0] = TempDesc; 858 AcpiUtAddReference (TempDesc); 859 } 860 else 861 { 862 Status = AE_AML_OPERAND_TYPE; 863 goto Cleanup; 864 } 865 } 866 else 867 { 868 switch ((Operand[0])->Common.Type) 869 { 870 case ACPI_TYPE_LOCAL_REFERENCE: 871 /* 872 * This is a DerefOf (LocalX | ArgX) 873 * 874 * Must resolve/dereference the local/arg reference first 875 */ 876 switch (Operand[0]->Reference.Class) 877 { 878 case ACPI_REFCLASS_LOCAL: 879 case ACPI_REFCLASS_ARG: 880 881 /* Set Operand[0] to the value of the local/arg */ 882 883 Status = AcpiDsMethodDataGetValue ( 884 Operand[0]->Reference.Class, 885 Operand[0]->Reference.Value, 886 WalkState, &TempDesc); 887 if (ACPI_FAILURE (Status)) 888 { 889 goto Cleanup; 890 } 891 892 /* 893 * Delete our reference to the input object and 894 * point to the object just retrieved 895 */ 896 AcpiUtRemoveReference (Operand[0]); 897 Operand[0] = TempDesc; 898 break; 899 900 case ACPI_REFCLASS_REFOF: 901 902 /* Get the object to which the reference refers */ 903 904 TempDesc = Operand[0]->Reference.Object; 905 AcpiUtRemoveReference (Operand[0]); 906 Operand[0] = TempDesc; 907 break; 908 909 default: 910 911 /* Must be an Index op - handled below */ 912 break; 913 } 914 break; 915 916 case ACPI_TYPE_STRING: 917 918 break; 919 920 default: 921 922 Status = AE_AML_OPERAND_TYPE; 923 goto Cleanup; 924 } 925 } 926 927 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED) 928 { 929 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING) 930 { 931 /* 932 * This is a DerefOf (String). The string is a reference 933 * to a named ACPI object. 934 * 935 * 1) Find the owning Node 936 * 2) Dereference the node to an actual object. Could be a 937 * Field, so we need to resolve the node to a value. 938 */ 939 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node, 940 Operand[0]->String.Pointer, 941 ACPI_NS_SEARCH_PARENT, 942 ACPI_CAST_INDIRECT_PTR ( 943 ACPI_NAMESPACE_NODE, &ReturnDesc)); 944 if (ACPI_FAILURE (Status)) 945 { 946 goto Cleanup; 947 } 948 949 Status = AcpiExResolveNodeToValue ( 950 ACPI_CAST_INDIRECT_PTR ( 951 ACPI_NAMESPACE_NODE, &ReturnDesc), 952 WalkState); 953 goto Cleanup; 954 } 955 } 956 957 /* Operand[0] may have changed from the code above */ 958 959 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 960 { 961 /* 962 * This is a DerefOf (ObjectReference) 963 * Get the actual object from the Node (This is the dereference). 964 * This case may only happen when a LocalX or ArgX is 965 * dereferenced above. 966 */ 967 ReturnDesc = AcpiNsGetAttachedObject ( 968 (ACPI_NAMESPACE_NODE *) Operand[0]); 969 AcpiUtAddReference (ReturnDesc); 970 } 971 else 972 { 973 /* 974 * This must be a reference object produced by either the 975 * Index() or RefOf() operator 976 */ 977 switch (Operand[0]->Reference.Class) 978 { 979 case ACPI_REFCLASS_INDEX: 980 /* 981 * The target type for the Index operator must be 982 * either a Buffer or a Package 983 */ 984 switch (Operand[0]->Reference.TargetType) 985 { 986 case ACPI_TYPE_BUFFER_FIELD: 987 988 TempDesc = Operand[0]->Reference.Object; 989 990 /* 991 * Create a new object that contains one element of the 992 * buffer -- the element pointed to by the index. 993 * 994 * NOTE: index into a buffer is NOT a pointer to a 995 * sub-buffer of the main buffer, it is only a pointer to a 996 * single element (byte) of the buffer! 997 * 998 * Since we are returning the value of the buffer at the 999 * indexed location, we don't need to add an additional 1000 * reference to the buffer itself. 1001 */ 1002 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 1003 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]); 1004 if (!ReturnDesc) 1005 { 1006 Status = AE_NO_MEMORY; 1007 goto Cleanup; 1008 } 1009 break; 1010 1011 case ACPI_TYPE_PACKAGE: 1012 /* 1013 * Return the referenced element of the package. We must 1014 * add another reference to the referenced object, however. 1015 */ 1016 ReturnDesc = *(Operand[0]->Reference.Where); 1017 if (!ReturnDesc) 1018 { 1019 /* 1020 * Element is NULL, do not allow the dereference. 1021 * This provides compatibility with other ACPI 1022 * implementations. 1023 */ 1024 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT); 1025 } 1026 1027 AcpiUtAddReference (ReturnDesc); 1028 break; 1029 1030 default: 1031 1032 ACPI_ERROR ((AE_INFO, 1033 "Unknown Index TargetType 0x%X in reference object %p", 1034 Operand[0]->Reference.TargetType, Operand[0])); 1035 1036 Status = AE_AML_OPERAND_TYPE; 1037 goto Cleanup; 1038 } 1039 break; 1040 1041 case ACPI_REFCLASS_REFOF: 1042 1043 ReturnDesc = Operand[0]->Reference.Object; 1044 1045 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == 1046 ACPI_DESC_TYPE_NAMED) 1047 { 1048 ReturnDesc = AcpiNsGetAttachedObject ( 1049 (ACPI_NAMESPACE_NODE *) ReturnDesc); 1050 if (!ReturnDesc) 1051 { 1052 break; 1053 } 1054 1055 /* 1056 * June 2013: 1057 * BufferFields/FieldUnits require additional resolution 1058 */ 1059 switch (ReturnDesc->Common.Type) 1060 { 1061 case ACPI_TYPE_BUFFER_FIELD: 1062 case ACPI_TYPE_LOCAL_REGION_FIELD: 1063 case ACPI_TYPE_LOCAL_BANK_FIELD: 1064 case ACPI_TYPE_LOCAL_INDEX_FIELD: 1065 1066 Status = AcpiExReadDataFromField ( 1067 WalkState, ReturnDesc, &TempDesc); 1068 if (ACPI_FAILURE (Status)) 1069 { 1070 goto Cleanup; 1071 } 1072 1073 ReturnDesc = TempDesc; 1074 break; 1075 1076 default: 1077 1078 /* Add another reference to the object */ 1079 1080 AcpiUtAddReference (ReturnDesc); 1081 break; 1082 } 1083 } 1084 break; 1085 1086 default: 1087 1088 ACPI_ERROR ((AE_INFO, 1089 "Unknown class in reference(%p) - 0x%2.2X", 1090 Operand[0], Operand[0]->Reference.Class)); 1091 1092 Status = AE_TYPE; 1093 goto Cleanup; 1094 } 1095 } 1096 break; 1097 1098 default: 1099 1100 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 1101 WalkState->Opcode)); 1102 1103 Status = AE_AML_BAD_OPCODE; 1104 goto Cleanup; 1105 } 1106 1107 1108 Cleanup: 1109 1110 /* Delete return object on error */ 1111 1112 if (ACPI_FAILURE (Status)) 1113 { 1114 AcpiUtRemoveReference (ReturnDesc); 1115 } 1116 1117 /* Save return object on success */ 1118 1119 else 1120 { 1121 WalkState->ResultObj = ReturnDesc; 1122 } 1123 1124 return_ACPI_STATUS (Status); 1125 } 1126