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 /* Perform "explicit" conversion */ 554 555 Status = AcpiExConvertToInteger (Operand[0], &ReturnDesc, 0); 556 if (ReturnDesc == Operand[0]) 557 { 558 /* No conversion performed, add ref to handle return value */ 559 560 AcpiUtAddReference (ReturnDesc); 561 } 562 break; 563 564 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */ 565 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */ 566 567 /* These are two obsolete opcodes */ 568 569 ACPI_ERROR ((AE_INFO, 570 "%s is obsolete and not implemented", 571 AcpiPsGetOpcodeName (WalkState->Opcode))); 572 Status = AE_SUPPORT; 573 goto Cleanup; 574 575 default: /* Unknown opcode */ 576 577 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 578 WalkState->Opcode)); 579 Status = AE_AML_BAD_OPCODE; 580 goto Cleanup; 581 } 582 583 if (ACPI_SUCCESS (Status)) 584 { 585 /* Store the return value computed above into the target object */ 586 587 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState); 588 } 589 590 591 Cleanup: 592 593 /* Delete return object on error */ 594 595 if (ACPI_FAILURE (Status)) 596 { 597 AcpiUtRemoveReference (ReturnDesc); 598 } 599 600 /* Save return object on success */ 601 602 else if (!WalkState->ResultObj) 603 { 604 WalkState->ResultObj = ReturnDesc; 605 } 606 607 return_ACPI_STATUS (Status); 608 } 609 610 611 /******************************************************************************* 612 * 613 * FUNCTION: AcpiExOpcode_1A_0T_1R 614 * 615 * PARAMETERS: WalkState - Current state (contains AML opcode) 616 * 617 * RETURN: Status 618 * 619 * DESCRIPTION: Execute opcode with one argument, no target, and a return value 620 * 621 ******************************************************************************/ 622 623 ACPI_STATUS 624 AcpiExOpcode_1A_0T_1R ( 625 ACPI_WALK_STATE *WalkState) 626 { 627 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 628 ACPI_OPERAND_OBJECT *TempDesc; 629 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 630 ACPI_STATUS Status = AE_OK; 631 UINT32 Type; 632 UINT64 Value; 633 634 635 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R, 636 AcpiPsGetOpcodeName (WalkState->Opcode)); 637 638 639 /* Examine the AML opcode */ 640 641 switch (WalkState->Opcode) 642 { 643 case AML_LNOT_OP: /* LNot (Operand) */ 644 645 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 646 if (!ReturnDesc) 647 { 648 Status = AE_NO_MEMORY; 649 goto Cleanup; 650 } 651 652 /* 653 * Set result to ONES (TRUE) if Value == 0. Note: 654 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above. 655 */ 656 if (!Operand[0]->Integer.Value) 657 { 658 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 659 } 660 break; 661 662 case AML_DECREMENT_OP: /* Decrement (Operand) */ 663 case AML_INCREMENT_OP: /* Increment (Operand) */ 664 /* 665 * Create a new integer. Can't just get the base integer and 666 * increment it because it may be an Arg or Field. 667 */ 668 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 669 if (!ReturnDesc) 670 { 671 Status = AE_NO_MEMORY; 672 goto Cleanup; 673 } 674 675 /* 676 * Since we are expecting a Reference operand, it can be either a 677 * NS Node or an internal object. 678 */ 679 TempDesc = Operand[0]; 680 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND) 681 { 682 /* Internal reference object - prevent deletion */ 683 684 AcpiUtAddReference (TempDesc); 685 } 686 687 /* 688 * Convert the Reference operand to an Integer (This removes a 689 * reference on the Operand[0] object) 690 * 691 * NOTE: We use LNOT_OP here in order to force resolution of the 692 * reference operand to an actual integer. 693 */ 694 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState); 695 if (ACPI_FAILURE (Status)) 696 { 697 ACPI_EXCEPTION ((AE_INFO, Status, 698 "While resolving operands for [%s]", 699 AcpiPsGetOpcodeName (WalkState->Opcode))); 700 701 goto Cleanup; 702 } 703 704 /* 705 * TempDesc is now guaranteed to be an Integer object -- 706 * Perform the actual increment or decrement 707 */ 708 if (WalkState->Opcode == AML_INCREMENT_OP) 709 { 710 ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1; 711 } 712 else 713 { 714 ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1; 715 } 716 717 /* Finished with this Integer object */ 718 719 AcpiUtRemoveReference (TempDesc); 720 721 /* 722 * Store the result back (indirectly) through the original 723 * Reference object 724 */ 725 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState); 726 break; 727 728 case AML_OBJECT_TYPE_OP: /* ObjectType (SourceObject) */ 729 /* 730 * Note: The operand is not resolved at this point because we want to 731 * get the associated object, not its value. For example, we don't 732 * want to resolve a FieldUnit to its value, we want the actual 733 * FieldUnit object. 734 */ 735 736 /* Get the type of the base object */ 737 738 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL); 739 if (ACPI_FAILURE (Status)) 740 { 741 goto Cleanup; 742 } 743 744 /* Allocate a descriptor to hold the type. */ 745 746 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type); 747 if (!ReturnDesc) 748 { 749 Status = AE_NO_MEMORY; 750 goto Cleanup; 751 } 752 break; 753 754 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */ 755 /* 756 * Note: The operand is not resolved at this point because we want to 757 * get the associated object, not its value. 758 */ 759 760 /* Get the base object */ 761 762 Status = AcpiExResolveMultiple ( 763 WalkState, Operand[0], &Type, &TempDesc); 764 if (ACPI_FAILURE (Status)) 765 { 766 goto Cleanup; 767 } 768 769 /* 770 * The type of the base object must be integer, buffer, string, or 771 * package. All others are not supported. 772 * 773 * NOTE: Integer is not specifically supported by the ACPI spec, 774 * but is supported implicitly via implicit operand conversion. 775 * rather than bother with conversion, we just use the byte width 776 * global (4 or 8 bytes). 777 */ 778 switch (Type) 779 { 780 case ACPI_TYPE_INTEGER: 781 782 Value = AcpiGbl_IntegerByteWidth; 783 break; 784 785 case ACPI_TYPE_STRING: 786 787 Value = TempDesc->String.Length; 788 break; 789 790 case ACPI_TYPE_BUFFER: 791 792 /* Buffer arguments may not be evaluated at this point */ 793 794 Status = AcpiDsGetBufferArguments (TempDesc); 795 Value = TempDesc->Buffer.Length; 796 break; 797 798 case ACPI_TYPE_PACKAGE: 799 800 /* Package arguments may not be evaluated at this point */ 801 802 Status = AcpiDsGetPackageArguments (TempDesc); 803 Value = TempDesc->Package.Count; 804 break; 805 806 default: 807 808 ACPI_ERROR ((AE_INFO, 809 "Operand must be Buffer/Integer/String/Package" 810 " - found type %s", 811 AcpiUtGetTypeName (Type))); 812 813 Status = AE_AML_OPERAND_TYPE; 814 goto Cleanup; 815 } 816 817 if (ACPI_FAILURE (Status)) 818 { 819 goto Cleanup; 820 } 821 822 /* 823 * Now that we have the size of the object, create a result 824 * object to hold the value 825 */ 826 ReturnDesc = AcpiUtCreateIntegerObject (Value); 827 if (!ReturnDesc) 828 { 829 Status = AE_NO_MEMORY; 830 goto Cleanup; 831 } 832 break; 833 834 835 case AML_REF_OF_OP: /* RefOf (SourceObject) */ 836 837 Status = AcpiExGetObjectReference ( 838 Operand[0], &ReturnDesc, WalkState); 839 if (ACPI_FAILURE (Status)) 840 { 841 goto Cleanup; 842 } 843 break; 844 845 846 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */ 847 848 /* Check for a method local or argument, or standalone String */ 849 850 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 851 { 852 TempDesc = AcpiNsGetAttachedObject ( 853 (ACPI_NAMESPACE_NODE *) Operand[0]); 854 if (TempDesc && 855 ((TempDesc->Common.Type == ACPI_TYPE_STRING) || 856 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE))) 857 { 858 Operand[0] = TempDesc; 859 AcpiUtAddReference (TempDesc); 860 } 861 else 862 { 863 Status = AE_AML_OPERAND_TYPE; 864 goto Cleanup; 865 } 866 } 867 else 868 { 869 switch ((Operand[0])->Common.Type) 870 { 871 case ACPI_TYPE_LOCAL_REFERENCE: 872 /* 873 * This is a DerefOf (LocalX | ArgX) 874 * 875 * Must resolve/dereference the local/arg reference first 876 */ 877 switch (Operand[0]->Reference.Class) 878 { 879 case ACPI_REFCLASS_LOCAL: 880 case ACPI_REFCLASS_ARG: 881 882 /* Set Operand[0] to the value of the local/arg */ 883 884 Status = AcpiDsMethodDataGetValue ( 885 Operand[0]->Reference.Class, 886 Operand[0]->Reference.Value, 887 WalkState, &TempDesc); 888 if (ACPI_FAILURE (Status)) 889 { 890 goto Cleanup; 891 } 892 893 /* 894 * Delete our reference to the input object and 895 * point to the object just retrieved 896 */ 897 AcpiUtRemoveReference (Operand[0]); 898 Operand[0] = TempDesc; 899 break; 900 901 case ACPI_REFCLASS_REFOF: 902 903 /* Get the object to which the reference refers */ 904 905 TempDesc = Operand[0]->Reference.Object; 906 AcpiUtRemoveReference (Operand[0]); 907 Operand[0] = TempDesc; 908 break; 909 910 default: 911 912 /* Must be an Index op - handled below */ 913 break; 914 } 915 break; 916 917 case ACPI_TYPE_STRING: 918 919 break; 920 921 default: 922 923 Status = AE_AML_OPERAND_TYPE; 924 goto Cleanup; 925 } 926 } 927 928 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED) 929 { 930 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING) 931 { 932 /* 933 * This is a DerefOf (String). The string is a reference 934 * to a named ACPI object. 935 * 936 * 1) Find the owning Node 937 * 2) Dereference the node to an actual object. Could be a 938 * Field, so we need to resolve the node to a value. 939 */ 940 Status = AcpiNsGetNodeUnlocked (WalkState->ScopeInfo->Scope.Node, 941 Operand[0]->String.Pointer, 942 ACPI_NS_SEARCH_PARENT, 943 ACPI_CAST_INDIRECT_PTR ( 944 ACPI_NAMESPACE_NODE, &ReturnDesc)); 945 if (ACPI_FAILURE (Status)) 946 { 947 goto Cleanup; 948 } 949 950 Status = AcpiExResolveNodeToValue ( 951 ACPI_CAST_INDIRECT_PTR ( 952 ACPI_NAMESPACE_NODE, &ReturnDesc), 953 WalkState); 954 goto Cleanup; 955 } 956 } 957 958 /* Operand[0] may have changed from the code above */ 959 960 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 961 { 962 /* 963 * This is a DerefOf (ObjectReference) 964 * Get the actual object from the Node (This is the dereference). 965 * This case may only happen when a LocalX or ArgX is 966 * dereferenced above. 967 */ 968 ReturnDesc = AcpiNsGetAttachedObject ( 969 (ACPI_NAMESPACE_NODE *) Operand[0]); 970 AcpiUtAddReference (ReturnDesc); 971 } 972 else 973 { 974 /* 975 * This must be a reference object produced by either the 976 * Index() or RefOf() operator 977 */ 978 switch (Operand[0]->Reference.Class) 979 { 980 case ACPI_REFCLASS_INDEX: 981 /* 982 * The target type for the Index operator must be 983 * either a Buffer or a Package 984 */ 985 switch (Operand[0]->Reference.TargetType) 986 { 987 case ACPI_TYPE_BUFFER_FIELD: 988 989 TempDesc = Operand[0]->Reference.Object; 990 991 /* 992 * Create a new object that contains one element of the 993 * buffer -- the element pointed to by the index. 994 * 995 * NOTE: index into a buffer is NOT a pointer to a 996 * sub-buffer of the main buffer, it is only a pointer to a 997 * single element (byte) of the buffer! 998 * 999 * Since we are returning the value of the buffer at the 1000 * indexed location, we don't need to add an additional 1001 * reference to the buffer itself. 1002 */ 1003 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 1004 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]); 1005 if (!ReturnDesc) 1006 { 1007 Status = AE_NO_MEMORY; 1008 goto Cleanup; 1009 } 1010 break; 1011 1012 case ACPI_TYPE_PACKAGE: 1013 /* 1014 * Return the referenced element of the package. We must 1015 * add another reference to the referenced object, however. 1016 */ 1017 ReturnDesc = *(Operand[0]->Reference.Where); 1018 if (!ReturnDesc) 1019 { 1020 /* 1021 * Element is NULL, do not allow the dereference. 1022 * This provides compatibility with other ACPI 1023 * implementations. 1024 */ 1025 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT); 1026 } 1027 1028 AcpiUtAddReference (ReturnDesc); 1029 break; 1030 1031 default: 1032 1033 ACPI_ERROR ((AE_INFO, 1034 "Unknown Index TargetType 0x%X in reference object %p", 1035 Operand[0]->Reference.TargetType, Operand[0])); 1036 1037 Status = AE_AML_OPERAND_TYPE; 1038 goto Cleanup; 1039 } 1040 break; 1041 1042 case ACPI_REFCLASS_REFOF: 1043 1044 ReturnDesc = Operand[0]->Reference.Object; 1045 1046 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == 1047 ACPI_DESC_TYPE_NAMED) 1048 { 1049 ReturnDesc = AcpiNsGetAttachedObject ( 1050 (ACPI_NAMESPACE_NODE *) ReturnDesc); 1051 if (!ReturnDesc) 1052 { 1053 break; 1054 } 1055 1056 /* 1057 * June 2013: 1058 * BufferFields/FieldUnits require additional resolution 1059 */ 1060 switch (ReturnDesc->Common.Type) 1061 { 1062 case ACPI_TYPE_BUFFER_FIELD: 1063 case ACPI_TYPE_LOCAL_REGION_FIELD: 1064 case ACPI_TYPE_LOCAL_BANK_FIELD: 1065 case ACPI_TYPE_LOCAL_INDEX_FIELD: 1066 1067 Status = AcpiExReadDataFromField ( 1068 WalkState, ReturnDesc, &TempDesc); 1069 if (ACPI_FAILURE (Status)) 1070 { 1071 goto Cleanup; 1072 } 1073 1074 ReturnDesc = TempDesc; 1075 break; 1076 1077 default: 1078 1079 /* Add another reference to the object */ 1080 1081 AcpiUtAddReference (ReturnDesc); 1082 break; 1083 } 1084 } 1085 break; 1086 1087 default: 1088 1089 ACPI_ERROR ((AE_INFO, 1090 "Unknown class in reference(%p) - 0x%2.2X", 1091 Operand[0], Operand[0]->Reference.Class)); 1092 1093 Status = AE_TYPE; 1094 goto Cleanup; 1095 } 1096 } 1097 break; 1098 1099 default: 1100 1101 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 1102 WalkState->Opcode)); 1103 1104 Status = AE_AML_BAD_OPCODE; 1105 goto Cleanup; 1106 } 1107 1108 1109 Cleanup: 1110 1111 /* Delete return object on error */ 1112 1113 if (ACPI_FAILURE (Status)) 1114 { 1115 AcpiUtRemoveReference (ReturnDesc); 1116 } 1117 1118 /* Save return object on success */ 1119 1120 else 1121 { 1122 WalkState->ResultObj = ReturnDesc; 1123 } 1124 1125 return_ACPI_STATUS (Status); 1126 } 1127