dsobject.c revision 193259
1/****************************************************************************** 2 * 3 * Module Name: dsobject - Dispatcher object management routines 4 * $Revision: 1.135 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. 13 * All rights reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117#define __DSOBJECT_C__ 118 119#include "acpi.h" 120#include "acparser.h" 121#include "amlcode.h" 122#include "acdispat.h" 123#include "acnamesp.h" 124#include "acinterp.h" 125 126#define _COMPONENT ACPI_DISPATCHER 127 ACPI_MODULE_NAME ("dsobject") 128 129/* Local prototypes */ 130 131static ACPI_STATUS 132AcpiDsBuildInternalObject ( 133 ACPI_WALK_STATE *WalkState, 134 ACPI_PARSE_OBJECT *Op, 135 ACPI_OPERAND_OBJECT **ObjDescPtr); 136 137 138#ifndef ACPI_NO_METHOD_EXECUTION 139/******************************************************************************* 140 * 141 * FUNCTION: AcpiDsBuildInternalObject 142 * 143 * PARAMETERS: WalkState - Current walk state 144 * Op - Parser object to be translated 145 * ObjDescPtr - Where the ACPI internal object is returned 146 * 147 * RETURN: Status 148 * 149 * DESCRIPTION: Translate a parser Op object to the equivalent namespace object 150 * Simple objects are any objects other than a package object! 151 * 152 ******************************************************************************/ 153 154static ACPI_STATUS 155AcpiDsBuildInternalObject ( 156 ACPI_WALK_STATE *WalkState, 157 ACPI_PARSE_OBJECT *Op, 158 ACPI_OPERAND_OBJECT **ObjDescPtr) 159{ 160 ACPI_OPERAND_OBJECT *ObjDesc; 161 ACPI_STATUS Status; 162 163 164 ACPI_FUNCTION_TRACE (DsBuildInternalObject); 165 166 167 *ObjDescPtr = NULL; 168 if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP) 169 { 170 /* 171 * This is a named object reference. If this name was 172 * previously looked up in the namespace, it was stored in this op. 173 * Otherwise, go ahead and look it up now 174 */ 175 if (!Op->Common.Node) 176 { 177 Status = AcpiNsLookup (WalkState->ScopeInfo, 178 Op->Common.Value.String, 179 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 180 ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE, NULL, 181 ACPI_CAST_INDIRECT_PTR (ACPI_NAMESPACE_NODE, &(Op->Common.Node))); 182 if (ACPI_FAILURE (Status)) 183 { 184 /* Check if we are resolving a named reference within a package */ 185 186 if ((Status == AE_NOT_FOUND) && (AcpiGbl_EnableInterpreterSlack) && 187 188 ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || 189 (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP))) 190 { 191 /* 192 * We didn't find the target and we are populating elements 193 * of a package - ignore if slack enabled. Some ASL code 194 * contains dangling invalid references in packages and 195 * expects that no exception will be issued. Leave the 196 * element as a null element. It cannot be used, but it 197 * can be overwritten by subsequent ASL code - this is 198 * typically the case. 199 */ 200 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 201 "Ignoring unresolved reference in package [%4.4s]\n", 202 WalkState->ScopeInfo->Scope.Node->Name.Ascii)); 203 204 return_ACPI_STATUS (AE_OK); 205 } 206 else 207 { 208 ACPI_ERROR_NAMESPACE (Op->Common.Value.String, Status); 209 } 210 211 return_ACPI_STATUS (Status); 212 } 213 } 214 } 215 216 /* Create and init a new internal ACPI object */ 217 218 ObjDesc = AcpiUtCreateInternalObject ( 219 (AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode))->ObjectType); 220 if (!ObjDesc) 221 { 222 return_ACPI_STATUS (AE_NO_MEMORY); 223 } 224 225 Status = AcpiDsInitObjectFromOp (WalkState, Op, Op->Common.AmlOpcode, 226 &ObjDesc); 227 if (ACPI_FAILURE (Status)) 228 { 229 AcpiUtRemoveReference (ObjDesc); 230 return_ACPI_STATUS (Status); 231 } 232 233 *ObjDescPtr = ObjDesc; 234 return_ACPI_STATUS (AE_OK); 235} 236 237 238/******************************************************************************* 239 * 240 * FUNCTION: AcpiDsBuildInternalBufferObj 241 * 242 * PARAMETERS: WalkState - Current walk state 243 * Op - Parser object to be translated 244 * BufferLength - Length of the buffer 245 * ObjDescPtr - Where the ACPI internal object is returned 246 * 247 * RETURN: Status 248 * 249 * DESCRIPTION: Translate a parser Op package object to the equivalent 250 * namespace object 251 * 252 ******************************************************************************/ 253 254ACPI_STATUS 255AcpiDsBuildInternalBufferObj ( 256 ACPI_WALK_STATE *WalkState, 257 ACPI_PARSE_OBJECT *Op, 258 UINT32 BufferLength, 259 ACPI_OPERAND_OBJECT **ObjDescPtr) 260{ 261 ACPI_PARSE_OBJECT *Arg; 262 ACPI_OPERAND_OBJECT *ObjDesc; 263 ACPI_PARSE_OBJECT *ByteList; 264 UINT32 ByteListLength = 0; 265 266 267 ACPI_FUNCTION_TRACE (DsBuildInternalBufferObj); 268 269 270 /* 271 * If we are evaluating a Named buffer object "Name (xxxx, Buffer)". 272 * The buffer object already exists (from the NS node), otherwise it must 273 * be created. 274 */ 275 ObjDesc = *ObjDescPtr; 276 if (!ObjDesc) 277 { 278 /* Create a new buffer object */ 279 280 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER); 281 *ObjDescPtr = ObjDesc; 282 if (!ObjDesc) 283 { 284 return_ACPI_STATUS (AE_NO_MEMORY); 285 } 286 } 287 288 /* 289 * Second arg is the buffer data (optional) ByteList can be either 290 * individual bytes or a string initializer. In either case, a 291 * ByteList appears in the AML. 292 */ 293 Arg = Op->Common.Value.Arg; /* skip first arg */ 294 295 ByteList = Arg->Named.Next; 296 if (ByteList) 297 { 298 if (ByteList->Common.AmlOpcode != AML_INT_BYTELIST_OP) 299 { 300 ACPI_ERROR ((AE_INFO, 301 "Expecting bytelist, got AML opcode %X in op %p", 302 ByteList->Common.AmlOpcode, ByteList)); 303 304 AcpiUtRemoveReference (ObjDesc); 305 return (AE_TYPE); 306 } 307 308 ByteListLength = (UINT32) ByteList->Common.Value.Integer; 309 } 310 311 /* 312 * The buffer length (number of bytes) will be the larger of: 313 * 1) The specified buffer length and 314 * 2) The length of the initializer byte list 315 */ 316 ObjDesc->Buffer.Length = BufferLength; 317 if (ByteListLength > BufferLength) 318 { 319 ObjDesc->Buffer.Length = ByteListLength; 320 } 321 322 /* Allocate the buffer */ 323 324 if (ObjDesc->Buffer.Length == 0) 325 { 326 ObjDesc->Buffer.Pointer = NULL; 327 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 328 "Buffer defined with zero length in AML, creating\n")); 329 } 330 else 331 { 332 ObjDesc->Buffer.Pointer = ACPI_ALLOCATE_ZEROED ( 333 ObjDesc->Buffer.Length); 334 if (!ObjDesc->Buffer.Pointer) 335 { 336 AcpiUtDeleteObjectDesc (ObjDesc); 337 return_ACPI_STATUS (AE_NO_MEMORY); 338 } 339 340 /* Initialize buffer from the ByteList (if present) */ 341 342 if (ByteList) 343 { 344 ACPI_MEMCPY (ObjDesc->Buffer.Pointer, ByteList->Named.Data, 345 ByteListLength); 346 } 347 } 348 349 ObjDesc->Buffer.Flags |= AOPOBJ_DATA_VALID; 350 Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc); 351 return_ACPI_STATUS (AE_OK); 352} 353 354 355/******************************************************************************* 356 * 357 * FUNCTION: AcpiDsBuildInternalPackageObj 358 * 359 * PARAMETERS: WalkState - Current walk state 360 * Op - Parser object to be translated 361 * ElementCount - Number of elements in the package - this is 362 * the NumElements argument to Package() 363 * ObjDescPtr - Where the ACPI internal object is returned 364 * 365 * RETURN: Status 366 * 367 * DESCRIPTION: Translate a parser Op package object to the equivalent 368 * namespace object 369 * 370 * NOTE: The number of elements in the package will be always be the NumElements 371 * count, regardless of the number of elements in the package list. If 372 * NumElements is smaller, only that many package list elements are used. 373 * if NumElements is larger, the Package object is padded out with 374 * objects of type Uninitialized (as per ACPI spec.) 375 * 376 * Even though the ASL compilers do not allow NumElements to be smaller 377 * than the Package list length (for the fixed length package opcode), some 378 * BIOS code modifies the AML on the fly to adjust the NumElements, and 379 * this code compensates for that. This also provides compatibility with 380 * other AML interpreters. 381 * 382 ******************************************************************************/ 383 384ACPI_STATUS 385AcpiDsBuildInternalPackageObj ( 386 ACPI_WALK_STATE *WalkState, 387 ACPI_PARSE_OBJECT *Op, 388 UINT32 ElementCount, 389 ACPI_OPERAND_OBJECT **ObjDescPtr) 390{ 391 ACPI_PARSE_OBJECT *Arg; 392 ACPI_PARSE_OBJECT *Parent; 393 ACPI_OPERAND_OBJECT *ObjDesc = NULL; 394 ACPI_STATUS Status = AE_OK; 395 ACPI_NATIVE_UINT i; 396 UINT16 Index; 397 UINT16 ReferenceCount; 398 399 400 ACPI_FUNCTION_TRACE (DsBuildInternalPackageObj); 401 402 403 /* Find the parent of a possibly nested package */ 404 405 Parent = Op->Common.Parent; 406 while ((Parent->Common.AmlOpcode == AML_PACKAGE_OP) || 407 (Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP)) 408 { 409 Parent = Parent->Common.Parent; 410 } 411 412 /* 413 * If we are evaluating a Named package object "Name (xxxx, Package)", 414 * the package object already exists, otherwise it must be created. 415 */ 416 ObjDesc = *ObjDescPtr; 417 if (!ObjDesc) 418 { 419 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_PACKAGE); 420 *ObjDescPtr = ObjDesc; 421 if (!ObjDesc) 422 { 423 return_ACPI_STATUS (AE_NO_MEMORY); 424 } 425 426 ObjDesc->Package.Node = Parent->Common.Node; 427 } 428 429 /* 430 * Allocate the element array (array of pointers to the individual 431 * objects) based on the NumElements parameter. Add an extra pointer slot 432 * so that the list is always null terminated. 433 */ 434 ObjDesc->Package.Elements = ACPI_ALLOCATE_ZEROED ( 435 ((ACPI_SIZE) ElementCount + 1) * sizeof (void *)); 436 437 if (!ObjDesc->Package.Elements) 438 { 439 AcpiUtDeleteObjectDesc (ObjDesc); 440 return_ACPI_STATUS (AE_NO_MEMORY); 441 } 442 443 ObjDesc->Package.Count = ElementCount; 444 445 /* 446 * Initialize the elements of the package, up to the NumElements count. 447 * Package is automatically padded with uninitialized (NULL) elements 448 * if NumElements is greater than the package list length. Likewise, 449 * Package is truncated if NumElements is less than the list length. 450 */ 451 Arg = Op->Common.Value.Arg; 452 Arg = Arg->Common.Next; 453 for (i = 0; Arg && (i < ElementCount); i++) 454 { 455 if (Arg->Common.AmlOpcode == AML_INT_RETURN_VALUE_OP) 456 { 457 /* This package element is already built, just get it */ 458 459 ObjDesc->Package.Elements[i] = 460 ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, Arg->Common.Node); 461 } 462 else 463 { 464 Status = AcpiDsBuildInternalObject (WalkState, Arg, 465 &ObjDesc->Package.Elements[i]); 466 } 467 468 if (*ObjDescPtr) 469 { 470 /* Existing package, get existing reference count */ 471 472 ReferenceCount = (*ObjDescPtr)->Common.ReferenceCount; 473 if (ReferenceCount > 1) 474 { 475 /* Make new element ref count match original ref count */ 476 477 for (Index = 0; Index < (ReferenceCount - 1); Index++) 478 { 479 AcpiUtAddReference ((ObjDesc->Package.Elements[i])); 480 } 481 } 482 } 483 484 Arg = Arg->Common.Next; 485 } 486 487 if (!Arg) 488 { 489 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 490 "Package List length larger than NumElements count (%X), truncated\n", 491 ElementCount)); 492 } 493 494 ObjDesc->Package.Flags |= AOPOBJ_DATA_VALID; 495 Op->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjDesc); 496 return_ACPI_STATUS (Status); 497} 498 499 500/******************************************************************************* 501 * 502 * FUNCTION: AcpiDsCreateNode 503 * 504 * PARAMETERS: WalkState - Current walk state 505 * Node - NS Node to be initialized 506 * Op - Parser object to be translated 507 * 508 * RETURN: Status 509 * 510 * DESCRIPTION: Create the object to be associated with a namespace node 511 * 512 ******************************************************************************/ 513 514ACPI_STATUS 515AcpiDsCreateNode ( 516 ACPI_WALK_STATE *WalkState, 517 ACPI_NAMESPACE_NODE *Node, 518 ACPI_PARSE_OBJECT *Op) 519{ 520 ACPI_STATUS Status; 521 ACPI_OPERAND_OBJECT *ObjDesc; 522 523 524 ACPI_FUNCTION_TRACE_PTR (DsCreateNode, Op); 525 526 527 /* 528 * Because of the execution pass through the non-control-method 529 * parts of the table, we can arrive here twice. Only init 530 * the named object node the first time through 531 */ 532 if (AcpiNsGetAttachedObject (Node)) 533 { 534 return_ACPI_STATUS (AE_OK); 535 } 536 537 if (!Op->Common.Value.Arg) 538 { 539 /* No arguments, there is nothing to do */ 540 541 return_ACPI_STATUS (AE_OK); 542 } 543 544 /* Build an internal object for the argument(s) */ 545 546 Status = AcpiDsBuildInternalObject (WalkState, Op->Common.Value.Arg, 547 &ObjDesc); 548 if (ACPI_FAILURE (Status)) 549 { 550 return_ACPI_STATUS (Status); 551 } 552 553 /* Re-type the object according to its argument */ 554 555 Node->Type = ACPI_GET_OBJECT_TYPE (ObjDesc); 556 557 /* Attach obj to node */ 558 559 Status = AcpiNsAttachObject (Node, ObjDesc, Node->Type); 560 561 /* Remove local reference to the object */ 562 563 AcpiUtRemoveReference (ObjDesc); 564 return_ACPI_STATUS (Status); 565} 566 567#endif /* ACPI_NO_METHOD_EXECUTION */ 568 569 570/******************************************************************************* 571 * 572 * FUNCTION: AcpiDsInitObjectFromOp 573 * 574 * PARAMETERS: WalkState - Current walk state 575 * Op - Parser op used to init the internal object 576 * Opcode - AML opcode associated with the object 577 * RetObjDesc - Namespace object to be initialized 578 * 579 * RETURN: Status 580 * 581 * DESCRIPTION: Initialize a namespace object from a parser Op and its 582 * associated arguments. The namespace object is a more compact 583 * representation of the Op and its arguments. 584 * 585 ******************************************************************************/ 586 587ACPI_STATUS 588AcpiDsInitObjectFromOp ( 589 ACPI_WALK_STATE *WalkState, 590 ACPI_PARSE_OBJECT *Op, 591 UINT16 Opcode, 592 ACPI_OPERAND_OBJECT **RetObjDesc) 593{ 594 const ACPI_OPCODE_INFO *OpInfo; 595 ACPI_OPERAND_OBJECT *ObjDesc; 596 ACPI_STATUS Status = AE_OK; 597 598 599 ACPI_FUNCTION_TRACE (DsInitObjectFromOp); 600 601 602 ObjDesc = *RetObjDesc; 603 OpInfo = AcpiPsGetOpcodeInfo (Opcode); 604 if (OpInfo->Class == AML_CLASS_UNKNOWN) 605 { 606 /* Unknown opcode */ 607 608 return_ACPI_STATUS (AE_TYPE); 609 } 610 611 /* Perform per-object initialization */ 612 613 switch (ACPI_GET_OBJECT_TYPE (ObjDesc)) 614 { 615 case ACPI_TYPE_BUFFER: 616 617 /* 618 * Defer evaluation of Buffer TermArg operand 619 */ 620 ObjDesc->Buffer.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, 621 WalkState->Operands[0]); 622 ObjDesc->Buffer.AmlStart = Op->Named.Data; 623 ObjDesc->Buffer.AmlLength = Op->Named.Length; 624 break; 625 626 627 case ACPI_TYPE_PACKAGE: 628 629 /* 630 * Defer evaluation of Package TermArg operand 631 */ 632 ObjDesc->Package.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, 633 WalkState->Operands[0]); 634 ObjDesc->Package.AmlStart = Op->Named.Data; 635 ObjDesc->Package.AmlLength = Op->Named.Length; 636 break; 637 638 639 case ACPI_TYPE_INTEGER: 640 641 switch (OpInfo->Type) 642 { 643 case AML_TYPE_CONSTANT: 644 /* 645 * Resolve AML Constants here - AND ONLY HERE! 646 * All constants are integers. 647 * We mark the integer with a flag that indicates that it started 648 * life as a constant -- so that stores to constants will perform 649 * as expected (noop). ZeroOp is used as a placeholder for optional 650 * target operands. 651 */ 652 ObjDesc->Common.Flags = AOPOBJ_AML_CONSTANT; 653 654 switch (Opcode) 655 { 656 case AML_ZERO_OP: 657 658 ObjDesc->Integer.Value = 0; 659 break; 660 661 case AML_ONE_OP: 662 663 ObjDesc->Integer.Value = 1; 664 break; 665 666 case AML_ONES_OP: 667 668 ObjDesc->Integer.Value = ACPI_INTEGER_MAX; 669 670 /* Truncate value if we are executing from a 32-bit ACPI table */ 671 672#ifndef ACPI_NO_METHOD_EXECUTION 673 AcpiExTruncateFor32bitTable (ObjDesc); 674#endif 675 break; 676 677 case AML_REVISION_OP: 678 679 ObjDesc->Integer.Value = ACPI_CA_VERSION; 680 break; 681 682 default: 683 684 ACPI_ERROR ((AE_INFO, 685 "Unknown constant opcode %X", Opcode)); 686 Status = AE_AML_OPERAND_TYPE; 687 break; 688 } 689 break; 690 691 692 case AML_TYPE_LITERAL: 693 694 ObjDesc->Integer.Value = Op->Common.Value.Integer; 695#ifndef ACPI_NO_METHOD_EXECUTION 696 AcpiExTruncateFor32bitTable (ObjDesc); 697#endif 698 break; 699 700 701 default: 702 ACPI_ERROR ((AE_INFO, "Unknown Integer type %X", 703 OpInfo->Type)); 704 Status = AE_AML_OPERAND_TYPE; 705 break; 706 } 707 break; 708 709 710 case ACPI_TYPE_STRING: 711 712 ObjDesc->String.Pointer = Op->Common.Value.String; 713 ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Op->Common.Value.String); 714 715 /* 716 * The string is contained in the ACPI table, don't ever try 717 * to delete it 718 */ 719 ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER; 720 break; 721 722 723 case ACPI_TYPE_METHOD: 724 break; 725 726 727 case ACPI_TYPE_LOCAL_REFERENCE: 728 729 switch (OpInfo->Type) 730 { 731 case AML_TYPE_LOCAL_VARIABLE: 732 733 /* Split the opcode into a base opcode + offset */ 734 735 ObjDesc->Reference.Opcode = AML_LOCAL_OP; 736 ObjDesc->Reference.Offset = Opcode - AML_LOCAL_OP; 737 738#ifndef ACPI_NO_METHOD_EXECUTION 739 Status = AcpiDsMethodDataGetNode (AML_LOCAL_OP, 740 ObjDesc->Reference.Offset, 741 WalkState, 742 (ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object); 743#endif 744 break; 745 746 747 case AML_TYPE_METHOD_ARGUMENT: 748 749 /* Split the opcode into a base opcode + offset */ 750 751 ObjDesc->Reference.Opcode = AML_ARG_OP; 752 ObjDesc->Reference.Offset = Opcode - AML_ARG_OP; 753 754#ifndef ACPI_NO_METHOD_EXECUTION 755 Status = AcpiDsMethodDataGetNode (AML_ARG_OP, 756 ObjDesc->Reference.Offset, 757 WalkState, 758 (ACPI_NAMESPACE_NODE **) &ObjDesc->Reference.Object); 759#endif 760 break; 761 762 default: /* Other literals, etc.. */ 763 764 if (Op->Common.AmlOpcode == AML_INT_NAMEPATH_OP) 765 { 766 /* Node was saved in Op */ 767 768 ObjDesc->Reference.Node = Op->Common.Node; 769 } 770 771 ObjDesc->Reference.Opcode = Opcode; 772 break; 773 } 774 break; 775 776 777 default: 778 779 ACPI_ERROR ((AE_INFO, "Unimplemented data type: %X", 780 ACPI_GET_OBJECT_TYPE (ObjDesc))); 781 782 Status = AE_AML_OPERAND_TYPE; 783 break; 784 } 785 786 return_ACPI_STATUS (Status); 787} 788 789 790