1 /****************************************************************************** 2 * 3 * Module Name: exoparg1 - AML execution - opcodes with 1 argument 4 * 5 *****************************************************************************/ 6 7 /****************************************************************************** 8 * 9 * 1. Copyright Notice 10 * 11 * Some or all of this work - Copyright (c) 1999 - 2016, Intel Corp. 12 * All rights reserved. 13 * 14 * 2. License 15 * 16 * 2.1. This is your license from Intel Corp. under its intellectual property 17 * rights. You may have additional license terms from the party that provided 18 * you this software, covering your right to use that party's intellectual 19 * property rights. 20 * 21 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 22 * copy of the source code appearing in this file ("Covered Code") an 23 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 24 * base code distributed originally by Intel ("Original Intel Code") to copy, 25 * make derivatives, distribute, use and display any portion of the Covered 26 * Code in any form, with the right to sublicense such rights; and 27 * 28 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 29 * license (with the right to sublicense), under only those claims of Intel 30 * patents that are infringed by the Original Intel Code, to make, use, sell, 31 * offer to sell, and import the Covered Code and derivative works thereof 32 * solely to the minimum extent necessary to exercise the above copyright 33 * license, and in no event shall the patent license extend to any additions 34 * to or modifications of the Original Intel Code. No other license or right 35 * is granted directly or by implication, estoppel or otherwise; 36 * 37 * The above copyright and patent license is granted only if the following 38 * conditions are met: 39 * 40 * 3. Conditions 41 * 42 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 43 * Redistribution of source code of any substantial portion of the Covered 44 * Code or modification with rights to further distribute source must include 45 * the above Copyright Notice, the above License, this list of Conditions, 46 * and the following Disclaimer and Export Compliance provision. In addition, 47 * Licensee must cause all Covered Code to which Licensee contributes to 48 * contain a file documenting the changes Licensee made to create that Covered 49 * Code and the date of any change. Licensee must include in that file the 50 * documentation of any changes made by any predecessor Licensee. Licensee 51 * must include a prominent statement that the modification is derived, 52 * directly or indirectly, from Original Intel Code. 53 * 54 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 55 * Redistribution of source code of any substantial portion of the Covered 56 * Code or modification without rights to further distribute source must 57 * include the following Disclaimer and Export Compliance provision in the 58 * documentation and/or other materials provided with distribution. In 59 * addition, Licensee may not authorize further sublicense of source of any 60 * portion of the Covered Code, and must include terms to the effect that the 61 * license from Licensee to its licensee is limited to the intellectual 62 * property embodied in the software Licensee provides to its licensee, and 63 * not to intellectual property embodied in modifications its licensee may 64 * make. 65 * 66 * 3.3. Redistribution of Executable. Redistribution in executable form of any 67 * substantial portion of the Covered Code or modification must reproduce the 68 * above Copyright Notice, and the following Disclaimer and Export Compliance 69 * provision in the documentation and/or other materials provided with the 70 * distribution. 71 * 72 * 3.4. Intel retains all right, title, and interest in and to the Original 73 * Intel Code. 74 * 75 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 76 * Intel shall be used in advertising or otherwise to promote the sale, use or 77 * other dealings in products derived from or relating to the Covered Code 78 * without prior written authorization from Intel. 79 * 80 * 4. Disclaimer and Export Compliance 81 * 82 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 83 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 84 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 85 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 86 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 87 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 88 * PARTICULAR PURPOSE. 89 * 90 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 91 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 92 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 93 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 94 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 95 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 96 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 97 * LIMITED REMEDY. 98 * 99 * 4.3. Licensee shall not export, either directly or indirectly, any of this 100 * software or system incorporating such software without first obtaining any 101 * required license or other approval from the U. S. Department of Commerce or 102 * any other agency or department of the United States Government. In the 103 * event Licensee exports any such software from the United States or 104 * re-exports any such software from a foreign destination, Licensee shall 105 * ensure that the distribution and export/re-export of the software is in 106 * compliance with all laws, regulations, orders, or other restrictions of the 107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 108 * any of its subsidiaries will export/re-export any technical data, process, 109 * software, or service, directly or indirectly, to any country for which the 110 * United States government or any agency thereof requires an export license, 111 * other governmental approval, or letter of assurance, without first obtaining 112 * such license, approval or letter. 113 * 114 *****************************************************************************/ 115 116 #include "acpi.h" 117 #include "accommon.h" 118 #include "acparser.h" 119 #include "acdispat.h" 120 #include "acinterp.h" 121 #include "amlcode.h" 122 #include "acnamesp.h" 123 124 125 #define _COMPONENT ACPI_EXECUTER 126 ACPI_MODULE_NAME ("exoparg1") 127 128 129 /*! 130 * Naming convention for AML interpreter execution routines. 131 * 132 * The routines that begin execution of AML opcodes are named with a common 133 * convention based upon the number of arguments, the number of target operands, 134 * and whether or not a value is returned: 135 * 136 * AcpiExOpcode_xA_yT_zR 137 * 138 * Where: 139 * 140 * xA - ARGUMENTS: The number of arguments (input operands) that are 141 * required for this opcode type (0 through 6 args). 142 * yT - TARGETS: The number of targets (output operands) that are required 143 * for this opcode type (0, 1, or 2 targets). 144 * zR - RETURN VALUE: Indicates whether this opcode type returns a value 145 * as the function return (0 or 1). 146 * 147 * The AcpiExOpcode* functions are called via the Dispatcher component with 148 * fully resolved operands. 149 !*/ 150 151 /******************************************************************************* 152 * 153 * FUNCTION: AcpiExOpcode_0A_0T_1R 154 * 155 * PARAMETERS: WalkState - Current state (contains AML opcode) 156 * 157 * RETURN: Status 158 * 159 * DESCRIPTION: Execute operator with no operands, one return value 160 * 161 ******************************************************************************/ 162 163 ACPI_STATUS 164 AcpiExOpcode_0A_0T_1R ( 165 ACPI_WALK_STATE *WalkState) 166 { 167 ACPI_STATUS Status = AE_OK; 168 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 169 170 171 ACPI_FUNCTION_TRACE_STR (ExOpcode_0A_0T_1R, 172 AcpiPsGetOpcodeName (WalkState->Opcode)); 173 174 175 /* Examine the AML opcode */ 176 177 switch (WalkState->Opcode) 178 { 179 case AML_TIMER_OP: /* Timer () */ 180 181 /* Create a return object of type Integer */ 182 183 ReturnDesc = AcpiUtCreateIntegerObject (AcpiOsGetTimer ()); 184 if (!ReturnDesc) 185 { 186 Status = AE_NO_MEMORY; 187 goto Cleanup; 188 } 189 break; 190 191 default: /* Unknown opcode */ 192 193 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 194 WalkState->Opcode)); 195 Status = AE_AML_BAD_OPCODE; 196 break; 197 } 198 199 Cleanup: 200 201 /* Delete return object on error */ 202 203 if ((ACPI_FAILURE (Status)) || WalkState->ResultObj) 204 { 205 AcpiUtRemoveReference (ReturnDesc); 206 WalkState->ResultObj = NULL; 207 } 208 else 209 { 210 /* Save the return value */ 211 212 WalkState->ResultObj = ReturnDesc; 213 } 214 215 return_ACPI_STATUS (Status); 216 } 217 218 219 /******************************************************************************* 220 * 221 * FUNCTION: AcpiExOpcode_1A_0T_0R 222 * 223 * PARAMETERS: WalkState - Current state (contains AML opcode) 224 * 225 * RETURN: Status 226 * 227 * DESCRIPTION: Execute Type 1 monadic operator with numeric operand on 228 * object stack 229 * 230 ******************************************************************************/ 231 232 ACPI_STATUS 233 AcpiExOpcode_1A_0T_0R ( 234 ACPI_WALK_STATE *WalkState) 235 { 236 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 237 ACPI_STATUS Status = AE_OK; 238 239 240 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_0R, 241 AcpiPsGetOpcodeName (WalkState->Opcode)); 242 243 244 /* Examine the AML opcode */ 245 246 switch (WalkState->Opcode) 247 { 248 case AML_RELEASE_OP: /* Release (MutexObject) */ 249 250 Status = AcpiExReleaseMutex (Operand[0], WalkState); 251 break; 252 253 case AML_RESET_OP: /* Reset (EventObject) */ 254 255 Status = AcpiExSystemResetEvent (Operand[0]); 256 break; 257 258 case AML_SIGNAL_OP: /* Signal (EventObject) */ 259 260 Status = AcpiExSystemSignalEvent (Operand[0]); 261 break; 262 263 case AML_SLEEP_OP: /* Sleep (MsecTime) */ 264 265 Status = AcpiExSystemDoSleep (Operand[0]->Integer.Value); 266 break; 267 268 case AML_STALL_OP: /* Stall (UsecTime) */ 269 270 Status = AcpiExSystemDoStall ((UINT32) Operand[0]->Integer.Value); 271 break; 272 273 case AML_UNLOAD_OP: /* Unload (Handle) */ 274 275 Status = AcpiExUnloadTable (Operand[0]); 276 break; 277 278 default: /* Unknown opcode */ 279 280 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 281 WalkState->Opcode)); 282 Status = AE_AML_BAD_OPCODE; 283 break; 284 } 285 286 return_ACPI_STATUS (Status); 287 } 288 289 290 /******************************************************************************* 291 * 292 * FUNCTION: AcpiExOpcode_1A_1T_0R 293 * 294 * PARAMETERS: WalkState - Current state (contains AML opcode) 295 * 296 * RETURN: Status 297 * 298 * DESCRIPTION: Execute opcode with one argument, one target, and no 299 * return value. 300 * 301 ******************************************************************************/ 302 303 ACPI_STATUS 304 AcpiExOpcode_1A_1T_0R ( 305 ACPI_WALK_STATE *WalkState) 306 { 307 ACPI_STATUS Status = AE_OK; 308 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 309 310 311 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_0R, 312 AcpiPsGetOpcodeName (WalkState->Opcode)); 313 314 315 /* Examine the AML opcode */ 316 317 switch (WalkState->Opcode) 318 { 319 case AML_LOAD_OP: 320 321 Status = AcpiExLoadOp (Operand[0], Operand[1], WalkState); 322 break; 323 324 default: /* Unknown opcode */ 325 326 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 327 WalkState->Opcode)); 328 Status = AE_AML_BAD_OPCODE; 329 goto Cleanup; 330 } 331 332 333 Cleanup: 334 335 return_ACPI_STATUS (Status); 336 } 337 338 339 /******************************************************************************* 340 * 341 * FUNCTION: AcpiExOpcode_1A_1T_1R 342 * 343 * PARAMETERS: WalkState - Current state (contains AML opcode) 344 * 345 * RETURN: Status 346 * 347 * DESCRIPTION: Execute opcode with one argument, one target, and a 348 * return value. 349 * 350 ******************************************************************************/ 351 352 ACPI_STATUS 353 AcpiExOpcode_1A_1T_1R ( 354 ACPI_WALK_STATE *WalkState) 355 { 356 ACPI_STATUS Status = AE_OK; 357 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 358 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 359 ACPI_OPERAND_OBJECT *ReturnDesc2 = NULL; 360 UINT32 Temp32; 361 UINT32 i; 362 UINT64 PowerOfTen; 363 UINT64 Digit; 364 365 366 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_1T_1R, 367 AcpiPsGetOpcodeName (WalkState->Opcode)); 368 369 370 /* Examine the AML opcode */ 371 372 switch (WalkState->Opcode) 373 { 374 case AML_BIT_NOT_OP: 375 case AML_FIND_SET_LEFT_BIT_OP: 376 case AML_FIND_SET_RIGHT_BIT_OP: 377 case AML_FROM_BCD_OP: 378 case AML_TO_BCD_OP: 379 case AML_COND_REF_OF_OP: 380 381 /* Create a return object of type Integer for these opcodes */ 382 383 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 384 if (!ReturnDesc) 385 { 386 Status = AE_NO_MEMORY; 387 goto Cleanup; 388 } 389 390 switch (WalkState->Opcode) 391 { 392 case AML_BIT_NOT_OP: /* Not (Operand, Result) */ 393 394 ReturnDesc->Integer.Value = ~Operand[0]->Integer.Value; 395 break; 396 397 case AML_FIND_SET_LEFT_BIT_OP: /* FindSetLeftBit (Operand, Result) */ 398 399 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 400 401 /* 402 * Acpi specification describes Integer type as a little 403 * endian unsigned value, so this boundary condition is valid. 404 */ 405 for (Temp32 = 0; ReturnDesc->Integer.Value && 406 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 407 { 408 ReturnDesc->Integer.Value >>= 1; 409 } 410 411 ReturnDesc->Integer.Value = Temp32; 412 break; 413 414 case AML_FIND_SET_RIGHT_BIT_OP: /* FindSetRightBit (Operand, Result) */ 415 416 ReturnDesc->Integer.Value = Operand[0]->Integer.Value; 417 418 /* 419 * The Acpi specification describes Integer type as a little 420 * endian unsigned value, so this boundary condition is valid. 421 */ 422 for (Temp32 = 0; ReturnDesc->Integer.Value && 423 Temp32 < ACPI_INTEGER_BIT_SIZE; ++Temp32) 424 { 425 ReturnDesc->Integer.Value <<= 1; 426 } 427 428 /* Since the bit position is one-based, subtract from 33 (65) */ 429 430 ReturnDesc->Integer.Value = 431 Temp32 == 0 ? 0 : (ACPI_INTEGER_BIT_SIZE + 1) - Temp32; 432 break; 433 434 case AML_FROM_BCD_OP: /* FromBcd (BCDValue, Result) */ 435 /* 436 * The 64-bit ACPI integer can hold 16 4-bit BCD characters 437 * (if table is 32-bit, integer can hold 8 BCD characters) 438 * Convert each 4-bit BCD value 439 */ 440 PowerOfTen = 1; 441 ReturnDesc->Integer.Value = 0; 442 Digit = Operand[0]->Integer.Value; 443 444 /* Convert each BCD digit (each is one nybble wide) */ 445 446 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 447 { 448 /* Get the least significant 4-bit BCD digit */ 449 450 Temp32 = ((UINT32) Digit) & 0xF; 451 452 /* Check the range of the digit */ 453 454 if (Temp32 > 9) 455 { 456 ACPI_ERROR ((AE_INFO, 457 "BCD digit too large (not decimal): 0x%X", 458 Temp32)); 459 460 Status = AE_AML_NUMERIC_OVERFLOW; 461 goto Cleanup; 462 } 463 464 /* Sum the digit into the result with the current power of 10 */ 465 466 ReturnDesc->Integer.Value += 467 (((UINT64) Temp32) * PowerOfTen); 468 469 /* Shift to next BCD digit */ 470 471 Digit >>= 4; 472 473 /* Next power of 10 */ 474 475 PowerOfTen *= 10; 476 } 477 break; 478 479 case AML_TO_BCD_OP: /* ToBcd (Operand, Result) */ 480 481 ReturnDesc->Integer.Value = 0; 482 Digit = Operand[0]->Integer.Value; 483 484 /* Each BCD digit is one nybble wide */ 485 486 for (i = 0; (i < AcpiGbl_IntegerNybbleWidth) && (Digit > 0); i++) 487 { 488 (void) AcpiUtShortDivide (Digit, 10, &Digit, &Temp32); 489 490 /* 491 * Insert the BCD digit that resides in the 492 * remainder from above 493 */ 494 ReturnDesc->Integer.Value |= 495 (((UINT64) Temp32) << ACPI_MUL_4 (i)); 496 } 497 498 /* Overflow if there is any data left in Digit */ 499 500 if (Digit > 0) 501 { 502 ACPI_ERROR ((AE_INFO, 503 "Integer too large to convert to BCD: 0x%8.8X%8.8X", 504 ACPI_FORMAT_UINT64 (Operand[0]->Integer.Value))); 505 Status = AE_AML_NUMERIC_OVERFLOW; 506 goto Cleanup; 507 } 508 break; 509 510 case AML_COND_REF_OF_OP: /* CondRefOf (SourceObject, Result) */ 511 /* 512 * This op is a little strange because the internal return value is 513 * different than the return value stored in the result descriptor 514 * (There are really two return values) 515 */ 516 if ((ACPI_NAMESPACE_NODE *) Operand[0] == AcpiGbl_RootNode) 517 { 518 /* 519 * This means that the object does not exist in the namespace, 520 * return FALSE 521 */ 522 ReturnDesc->Integer.Value = 0; 523 goto Cleanup; 524 } 525 526 /* Get the object reference, store it, and remove our reference */ 527 528 Status = AcpiExGetObjectReference (Operand[0], 529 &ReturnDesc2, WalkState); 530 if (ACPI_FAILURE (Status)) 531 { 532 goto Cleanup; 533 } 534 535 Status = AcpiExStore (ReturnDesc2, Operand[1], WalkState); 536 AcpiUtRemoveReference (ReturnDesc2); 537 538 /* The object exists in the namespace, return TRUE */ 539 540 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 541 goto Cleanup; 542 543 544 default: 545 546 /* No other opcodes get here */ 547 548 break; 549 } 550 break; 551 552 case AML_STORE_OP: /* Store (Source, Target) */ 553 /* 554 * A store operand is typically a number, string, buffer or lvalue 555 * Be careful about deleting the source object, 556 * since the object itself may have been stored. 557 */ 558 Status = AcpiExStore (Operand[0], Operand[1], WalkState); 559 if (ACPI_FAILURE (Status)) 560 { 561 return_ACPI_STATUS (Status); 562 } 563 564 /* It is possible that the Store already produced a return object */ 565 566 if (!WalkState->ResultObj) 567 { 568 /* 569 * Normally, we would remove a reference on the Operand[0] 570 * parameter; But since it is being used as the internal return 571 * object (meaning we would normally increment it), the two 572 * cancel out, and we simply don't do anything. 573 */ 574 WalkState->ResultObj = Operand[0]; 575 WalkState->Operands[0] = NULL; /* Prevent deletion */ 576 } 577 return_ACPI_STATUS (Status); 578 579 /* 580 * ACPI 2.0 Opcodes 581 */ 582 case AML_COPY_OP: /* Copy (Source, Target) */ 583 584 Status = AcpiUtCopyIobjectToIobject ( 585 Operand[0], &ReturnDesc, WalkState); 586 break; 587 588 case AML_TO_DECSTRING_OP: /* ToDecimalString (Data, Result) */ 589 590 Status = AcpiExConvertToString ( 591 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_DECIMAL); 592 if (ReturnDesc == Operand[0]) 593 { 594 /* No conversion performed, add ref to handle return value */ 595 596 AcpiUtAddReference (ReturnDesc); 597 } 598 break; 599 600 case AML_TO_HEXSTRING_OP: /* ToHexString (Data, Result) */ 601 602 Status = AcpiExConvertToString ( 603 Operand[0], &ReturnDesc, ACPI_EXPLICIT_CONVERT_HEX); 604 if (ReturnDesc == Operand[0]) 605 { 606 /* No conversion performed, add ref to handle return value */ 607 608 AcpiUtAddReference (ReturnDesc); 609 } 610 break; 611 612 case AML_TO_BUFFER_OP: /* ToBuffer (Data, Result) */ 613 614 Status = AcpiExConvertToBuffer (Operand[0], &ReturnDesc); 615 if (ReturnDesc == Operand[0]) 616 { 617 /* No conversion performed, add ref to handle return value */ 618 619 AcpiUtAddReference (ReturnDesc); 620 } 621 break; 622 623 case AML_TO_INTEGER_OP: /* ToInteger (Data, Result) */ 624 625 Status = AcpiExConvertToInteger ( 626 Operand[0], &ReturnDesc, ACPI_ANY_BASE); 627 if (ReturnDesc == Operand[0]) 628 { 629 /* No conversion performed, add ref to handle return value */ 630 631 AcpiUtAddReference (ReturnDesc); 632 } 633 break; 634 635 case AML_SHIFT_LEFT_BIT_OP: /* ShiftLeftBit (Source, BitNum) */ 636 case AML_SHIFT_RIGHT_BIT_OP: /* ShiftRightBit (Source, BitNum) */ 637 638 /* These are two obsolete opcodes */ 639 640 ACPI_ERROR ((AE_INFO, 641 "%s is obsolete and not implemented", 642 AcpiPsGetOpcodeName (WalkState->Opcode))); 643 Status = AE_SUPPORT; 644 goto Cleanup; 645 646 default: /* Unknown opcode */ 647 648 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 649 WalkState->Opcode)); 650 Status = AE_AML_BAD_OPCODE; 651 goto Cleanup; 652 } 653 654 if (ACPI_SUCCESS (Status)) 655 { 656 /* Store the return value computed above into the target object */ 657 658 Status = AcpiExStore (ReturnDesc, Operand[1], WalkState); 659 } 660 661 662 Cleanup: 663 664 /* Delete return object on error */ 665 666 if (ACPI_FAILURE (Status)) 667 { 668 AcpiUtRemoveReference (ReturnDesc); 669 } 670 671 /* Save return object on success */ 672 673 else if (!WalkState->ResultObj) 674 { 675 WalkState->ResultObj = ReturnDesc; 676 } 677 678 return_ACPI_STATUS (Status); 679 } 680 681 682 /******************************************************************************* 683 * 684 * FUNCTION: AcpiExOpcode_1A_0T_1R 685 * 686 * PARAMETERS: WalkState - Current state (contains AML opcode) 687 * 688 * RETURN: Status 689 * 690 * DESCRIPTION: Execute opcode with one argument, no target, and a return value 691 * 692 ******************************************************************************/ 693 694 ACPI_STATUS 695 AcpiExOpcode_1A_0T_1R ( 696 ACPI_WALK_STATE *WalkState) 697 { 698 ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; 699 ACPI_OPERAND_OBJECT *TempDesc; 700 ACPI_OPERAND_OBJECT *ReturnDesc = NULL; 701 ACPI_STATUS Status = AE_OK; 702 UINT32 Type; 703 UINT64 Value; 704 705 706 ACPI_FUNCTION_TRACE_STR (ExOpcode_1A_0T_1R, 707 AcpiPsGetOpcodeName (WalkState->Opcode)); 708 709 710 /* Examine the AML opcode */ 711 712 switch (WalkState->Opcode) 713 { 714 case AML_LNOT_OP: /* LNot (Operand) */ 715 716 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 0); 717 if (!ReturnDesc) 718 { 719 Status = AE_NO_MEMORY; 720 goto Cleanup; 721 } 722 723 /* 724 * Set result to ONES (TRUE) if Value == 0. Note: 725 * ReturnDesc->Integer.Value is initially == 0 (FALSE) from above. 726 */ 727 if (!Operand[0]->Integer.Value) 728 { 729 ReturnDesc->Integer.Value = ACPI_UINT64_MAX; 730 } 731 break; 732 733 case AML_DECREMENT_OP: /* Decrement (Operand) */ 734 case AML_INCREMENT_OP: /* Increment (Operand) */ 735 /* 736 * Create a new integer. Can't just get the base integer and 737 * increment it because it may be an Arg or Field. 738 */ 739 ReturnDesc = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 740 if (!ReturnDesc) 741 { 742 Status = AE_NO_MEMORY; 743 goto Cleanup; 744 } 745 746 /* 747 * Since we are expecting a Reference operand, it can be either a 748 * NS Node or an internal object. 749 */ 750 TempDesc = Operand[0]; 751 if (ACPI_GET_DESCRIPTOR_TYPE (TempDesc) == ACPI_DESC_TYPE_OPERAND) 752 { 753 /* Internal reference object - prevent deletion */ 754 755 AcpiUtAddReference (TempDesc); 756 } 757 758 /* 759 * Convert the Reference operand to an Integer (This removes a 760 * reference on the Operand[0] object) 761 * 762 * NOTE: We use LNOT_OP here in order to force resolution of the 763 * reference operand to an actual integer. 764 */ 765 Status = AcpiExResolveOperands (AML_LNOT_OP, &TempDesc, WalkState); 766 if (ACPI_FAILURE (Status)) 767 { 768 ACPI_EXCEPTION ((AE_INFO, Status, 769 "While resolving operands for [%s]", 770 AcpiPsGetOpcodeName (WalkState->Opcode))); 771 772 goto Cleanup; 773 } 774 775 /* 776 * TempDesc is now guaranteed to be an Integer object -- 777 * Perform the actual increment or decrement 778 */ 779 if (WalkState->Opcode == AML_INCREMENT_OP) 780 { 781 ReturnDesc->Integer.Value = TempDesc->Integer.Value + 1; 782 } 783 else 784 { 785 ReturnDesc->Integer.Value = TempDesc->Integer.Value - 1; 786 } 787 788 /* Finished with this Integer object */ 789 790 AcpiUtRemoveReference (TempDesc); 791 792 /* 793 * Store the result back (indirectly) through the original 794 * Reference object 795 */ 796 Status = AcpiExStore (ReturnDesc, Operand[0], WalkState); 797 break; 798 799 case AML_OBJECT_TYPE_OP: /* ObjectType (SourceObject) */ 800 /* 801 * Note: The operand is not resolved at this point because we want to 802 * get the associated object, not its value. For example, we don't 803 * want to resolve a FieldUnit to its value, we want the actual 804 * FieldUnit object. 805 */ 806 807 /* Get the type of the base object */ 808 809 Status = AcpiExResolveMultiple (WalkState, Operand[0], &Type, NULL); 810 if (ACPI_FAILURE (Status)) 811 { 812 goto Cleanup; 813 } 814 815 /* Allocate a descriptor to hold the type. */ 816 817 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) Type); 818 if (!ReturnDesc) 819 { 820 Status = AE_NO_MEMORY; 821 goto Cleanup; 822 } 823 break; 824 825 case AML_SIZE_OF_OP: /* SizeOf (SourceObject) */ 826 /* 827 * Note: The operand is not resolved at this point because we want to 828 * get the associated object, not its value. 829 */ 830 831 /* Get the base object */ 832 833 Status = AcpiExResolveMultiple ( 834 WalkState, Operand[0], &Type, &TempDesc); 835 if (ACPI_FAILURE (Status)) 836 { 837 goto Cleanup; 838 } 839 840 /* 841 * The type of the base object must be integer, buffer, string, or 842 * package. All others are not supported. 843 * 844 * NOTE: Integer is not specifically supported by the ACPI spec, 845 * but is supported implicitly via implicit operand conversion. 846 * rather than bother with conversion, we just use the byte width 847 * global (4 or 8 bytes). 848 */ 849 switch (Type) 850 { 851 case ACPI_TYPE_INTEGER: 852 853 Value = AcpiGbl_IntegerByteWidth; 854 break; 855 856 case ACPI_TYPE_STRING: 857 858 Value = TempDesc->String.Length; 859 break; 860 861 case ACPI_TYPE_BUFFER: 862 863 /* Buffer arguments may not be evaluated at this point */ 864 865 Status = AcpiDsGetBufferArguments (TempDesc); 866 Value = TempDesc->Buffer.Length; 867 break; 868 869 case ACPI_TYPE_PACKAGE: 870 871 /* Package arguments may not be evaluated at this point */ 872 873 Status = AcpiDsGetPackageArguments (TempDesc); 874 Value = TempDesc->Package.Count; 875 break; 876 877 default: 878 879 ACPI_ERROR ((AE_INFO, 880 "Operand must be Buffer/Integer/String/Package" 881 " - found type %s", 882 AcpiUtGetTypeName (Type))); 883 884 Status = AE_AML_OPERAND_TYPE; 885 goto Cleanup; 886 } 887 888 if (ACPI_FAILURE (Status)) 889 { 890 goto Cleanup; 891 } 892 893 /* 894 * Now that we have the size of the object, create a result 895 * object to hold the value 896 */ 897 ReturnDesc = AcpiUtCreateIntegerObject (Value); 898 if (!ReturnDesc) 899 { 900 Status = AE_NO_MEMORY; 901 goto Cleanup; 902 } 903 break; 904 905 906 case AML_REF_OF_OP: /* RefOf (SourceObject) */ 907 908 Status = AcpiExGetObjectReference ( 909 Operand[0], &ReturnDesc, WalkState); 910 if (ACPI_FAILURE (Status)) 911 { 912 goto Cleanup; 913 } 914 break; 915 916 917 case AML_DEREF_OF_OP: /* DerefOf (ObjReference | String) */ 918 919 /* Check for a method local or argument, or standalone String */ 920 921 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 922 { 923 TempDesc = AcpiNsGetAttachedObject ( 924 (ACPI_NAMESPACE_NODE *) Operand[0]); 925 if (TempDesc && 926 ((TempDesc->Common.Type == ACPI_TYPE_STRING) || 927 (TempDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE))) 928 { 929 Operand[0] = TempDesc; 930 AcpiUtAddReference (TempDesc); 931 } 932 else 933 { 934 Status = AE_AML_OPERAND_TYPE; 935 goto Cleanup; 936 } 937 } 938 else 939 { 940 switch ((Operand[0])->Common.Type) 941 { 942 case ACPI_TYPE_LOCAL_REFERENCE: 943 /* 944 * This is a DerefOf (LocalX | ArgX) 945 * 946 * Must resolve/dereference the local/arg reference first 947 */ 948 switch (Operand[0]->Reference.Class) 949 { 950 case ACPI_REFCLASS_LOCAL: 951 case ACPI_REFCLASS_ARG: 952 953 /* Set Operand[0] to the value of the local/arg */ 954 955 Status = AcpiDsMethodDataGetValue ( 956 Operand[0]->Reference.Class, 957 Operand[0]->Reference.Value, 958 WalkState, &TempDesc); 959 if (ACPI_FAILURE (Status)) 960 { 961 goto Cleanup; 962 } 963 964 /* 965 * Delete our reference to the input object and 966 * point to the object just retrieved 967 */ 968 AcpiUtRemoveReference (Operand[0]); 969 Operand[0] = TempDesc; 970 break; 971 972 case ACPI_REFCLASS_REFOF: 973 974 /* Get the object to which the reference refers */ 975 976 TempDesc = Operand[0]->Reference.Object; 977 AcpiUtRemoveReference (Operand[0]); 978 Operand[0] = TempDesc; 979 break; 980 981 default: 982 983 /* Must be an Index op - handled below */ 984 break; 985 } 986 break; 987 988 case ACPI_TYPE_STRING: 989 990 break; 991 992 default: 993 994 Status = AE_AML_OPERAND_TYPE; 995 goto Cleanup; 996 } 997 } 998 999 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) != ACPI_DESC_TYPE_NAMED) 1000 { 1001 if ((Operand[0])->Common.Type == ACPI_TYPE_STRING) 1002 { 1003 /* 1004 * This is a DerefOf (String). The string is a reference 1005 * to a named ACPI object. 1006 * 1007 * 1) Find the owning Node 1008 * 2) Dereference the node to an actual object. Could be a 1009 * Field, so we need to resolve the node to a value. 1010 */ 1011 Status = AcpiNsGetNode (WalkState->ScopeInfo->Scope.Node, 1012 Operand[0]->String.Pointer, 1013 ACPI_NS_SEARCH_PARENT, 1014 ACPI_CAST_INDIRECT_PTR ( 1015 ACPI_NAMESPACE_NODE, &ReturnDesc)); 1016 if (ACPI_FAILURE (Status)) 1017 { 1018 goto Cleanup; 1019 } 1020 1021 Status = AcpiExResolveNodeToValue ( 1022 ACPI_CAST_INDIRECT_PTR ( 1023 ACPI_NAMESPACE_NODE, &ReturnDesc), 1024 WalkState); 1025 goto Cleanup; 1026 } 1027 } 1028 1029 /* Operand[0] may have changed from the code above */ 1030 1031 if (ACPI_GET_DESCRIPTOR_TYPE (Operand[0]) == ACPI_DESC_TYPE_NAMED) 1032 { 1033 /* 1034 * This is a DerefOf (ObjectReference) 1035 * Get the actual object from the Node (This is the dereference). 1036 * This case may only happen when a LocalX or ArgX is 1037 * dereferenced above. 1038 */ 1039 ReturnDesc = AcpiNsGetAttachedObject ( 1040 (ACPI_NAMESPACE_NODE *) Operand[0]); 1041 AcpiUtAddReference (ReturnDesc); 1042 } 1043 else 1044 { 1045 /* 1046 * This must be a reference object produced by either the 1047 * Index() or RefOf() operator 1048 */ 1049 switch (Operand[0]->Reference.Class) 1050 { 1051 case ACPI_REFCLASS_INDEX: 1052 /* 1053 * The target type for the Index operator must be 1054 * either a Buffer or a Package 1055 */ 1056 switch (Operand[0]->Reference.TargetType) 1057 { 1058 case ACPI_TYPE_BUFFER_FIELD: 1059 1060 TempDesc = Operand[0]->Reference.Object; 1061 1062 /* 1063 * Create a new object that contains one element of the 1064 * buffer -- the element pointed to by the index. 1065 * 1066 * NOTE: index into a buffer is NOT a pointer to a 1067 * sub-buffer of the main buffer, it is only a pointer to a 1068 * single element (byte) of the buffer! 1069 * 1070 * Since we are returning the value of the buffer at the 1071 * indexed location, we don't need to add an additional 1072 * reference to the buffer itself. 1073 */ 1074 ReturnDesc = AcpiUtCreateIntegerObject ((UINT64) 1075 TempDesc->Buffer.Pointer[Operand[0]->Reference.Value]); 1076 if (!ReturnDesc) 1077 { 1078 Status = AE_NO_MEMORY; 1079 goto Cleanup; 1080 } 1081 break; 1082 1083 case ACPI_TYPE_PACKAGE: 1084 /* 1085 * Return the referenced element of the package. We must 1086 * add another reference to the referenced object, however. 1087 */ 1088 ReturnDesc = *(Operand[0]->Reference.Where); 1089 if (!ReturnDesc) 1090 { 1091 /* 1092 * Element is NULL, do not allow the dereference. 1093 * This provides compatibility with other ACPI 1094 * implementations. 1095 */ 1096 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ELEMENT); 1097 } 1098 1099 AcpiUtAddReference (ReturnDesc); 1100 break; 1101 1102 default: 1103 1104 ACPI_ERROR ((AE_INFO, 1105 "Unknown Index TargetType 0x%X in reference object %p", 1106 Operand[0]->Reference.TargetType, Operand[0])); 1107 1108 Status = AE_AML_OPERAND_TYPE; 1109 goto Cleanup; 1110 } 1111 break; 1112 1113 case ACPI_REFCLASS_REFOF: 1114 1115 ReturnDesc = Operand[0]->Reference.Object; 1116 1117 if (ACPI_GET_DESCRIPTOR_TYPE (ReturnDesc) == 1118 ACPI_DESC_TYPE_NAMED) 1119 { 1120 ReturnDesc = AcpiNsGetAttachedObject ( 1121 (ACPI_NAMESPACE_NODE *) ReturnDesc); 1122 if (!ReturnDesc) 1123 { 1124 break; 1125 } 1126 1127 /* 1128 * June 2013: 1129 * BufferFields/FieldUnits require additional resolution 1130 */ 1131 switch (ReturnDesc->Common.Type) 1132 { 1133 case ACPI_TYPE_BUFFER_FIELD: 1134 case ACPI_TYPE_LOCAL_REGION_FIELD: 1135 case ACPI_TYPE_LOCAL_BANK_FIELD: 1136 case ACPI_TYPE_LOCAL_INDEX_FIELD: 1137 1138 Status = AcpiExReadDataFromField ( 1139 WalkState, ReturnDesc, &TempDesc); 1140 if (ACPI_FAILURE (Status)) 1141 { 1142 goto Cleanup; 1143 } 1144 1145 ReturnDesc = TempDesc; 1146 break; 1147 1148 default: 1149 1150 /* Add another reference to the object */ 1151 1152 AcpiUtAddReference (ReturnDesc); 1153 break; 1154 } 1155 } 1156 break; 1157 1158 default: 1159 1160 ACPI_ERROR ((AE_INFO, 1161 "Unknown class in reference(%p) - 0x%2.2X", 1162 Operand[0], Operand[0]->Reference.Class)); 1163 1164 Status = AE_TYPE; 1165 goto Cleanup; 1166 } 1167 } 1168 break; 1169 1170 default: 1171 1172 ACPI_ERROR ((AE_INFO, "Unknown AML opcode 0x%X", 1173 WalkState->Opcode)); 1174 1175 Status = AE_AML_BAD_OPCODE; 1176 goto Cleanup; 1177 } 1178 1179 1180 Cleanup: 1181 1182 /* Delete return object on error */ 1183 1184 if (ACPI_FAILURE (Status)) 1185 { 1186 AcpiUtRemoveReference (ReturnDesc); 1187 } 1188 1189 /* Save return object on success */ 1190 1191 else 1192 { 1193 WalkState->ResultObj = ReturnDesc; 1194 } 1195 1196 return_ACPI_STATUS (Status); 1197 } 1198