exstore.c revision 83174
1 2/****************************************************************************** 3 * 4 * Module Name: exstore - AML Interpreter object store support 5 * $Revision: 147 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 14 * All rights reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __EXSTORE_C__ 119 120#include "acpi.h" 121#include "acparser.h" 122#include "acdispat.h" 123#include "acinterp.h" 124#include "amlcode.h" 125#include "acnamesp.h" 126#include "actables.h" 127 128 129#define _COMPONENT ACPI_EXECUTER 130 MODULE_NAME ("exstore") 131 132 133/******************************************************************************* 134 * 135 * FUNCTION: AcpiExStore 136 * 137 * PARAMETERS: *ValDesc - Value to be stored 138 * *DestDesc - Where to store it. Must be an NS node 139 * or an ACPI_OPERAND_OBJECT of type 140 * Reference; if the latter the descriptor 141 * will be either reused or deleted. 142 * 143 * RETURN: Status 144 * 145 * DESCRIPTION: Store the value described by ValDesc into the location 146 * described by DestDesc. Called by various interpreter 147 * functions to store the result of an operation into 148 * the destination operand. 149 * 150 ******************************************************************************/ 151 152ACPI_STATUS 153AcpiExStore ( 154 ACPI_OPERAND_OBJECT *ValDesc, 155 ACPI_OPERAND_OBJECT *DestDesc, 156 ACPI_WALK_STATE *WalkState) 157{ 158 ACPI_STATUS Status = AE_OK; 159 ACPI_OPERAND_OBJECT *RefDesc = DestDesc; 160 161 162 FUNCTION_TRACE_PTR ("ExStore", DestDesc); 163 164 165 /* Validate parameters */ 166 167 if (!ValDesc || !DestDesc) 168 { 169 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - null pointer\n")); 170 return_ACPI_STATUS (AE_AML_NO_OPERAND); 171 } 172 173 /* DestDesc can be either a namespace node or an ACPI object */ 174 175 if (VALID_DESCRIPTOR_TYPE (DestDesc, ACPI_DESC_TYPE_NAMED)) 176 { 177 /* 178 * Dest is a namespace node, 179 * Storing an object into a Name "container" 180 */ 181 Status = AcpiExStoreObjectToNode (ValDesc, 182 (ACPI_NAMESPACE_NODE *) DestDesc, WalkState); 183 184 /* All done, that's it */ 185 186 return_ACPI_STATUS (Status); 187 } 188 189 190 /* Destination object must be an object of type Reference */ 191 192 if (DestDesc->Common.Type != INTERNAL_TYPE_REFERENCE) 193 { 194 /* Destination is not an Reference */ 195 196 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 197 "Destination is not a ReferenceObj [%p]\n", DestDesc)); 198 199 DUMP_STACK_ENTRY (ValDesc); 200 DUMP_STACK_ENTRY (DestDesc); 201 DUMP_OPERANDS (&DestDesc, IMODE_EXECUTE, "ExStore", 202 2, "Target is not a ReferenceObj"); 203 204 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 205 } 206 207 208 /* 209 * Examine the Reference opcode. These cases are handled: 210 * 211 * 1) Store to Name (Change the object associated with a name) 212 * 2) Store to an indexed area of a Buffer or Package 213 * 3) Store to a Method Local or Arg 214 * 4) Store to the debug object 215 * 5) Store to a constant -- a noop 216 */ 217 switch (RefDesc->Reference.Opcode) 218 { 219 220 case AML_NAME_OP: 221 222 /* Storing an object into a Name "container" */ 223 224 Status = AcpiExStoreObjectToNode (ValDesc, RefDesc->Reference.Object, 225 WalkState); 226 break; 227 228 229 case AML_INDEX_OP: 230 231 /* Storing to an Index (pointer into a packager or buffer) */ 232 233 Status = AcpiExStoreObjectToIndex (ValDesc, RefDesc, WalkState); 234 break; 235 236 237 case AML_LOCAL_OP: 238 case AML_ARG_OP: 239 240 /* Store to a method local/arg */ 241 242 Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Opcode, 243 RefDesc->Reference.Offset, ValDesc, WalkState); 244 break; 245 246 247 case AML_DEBUG_OP: 248 249 /* 250 * Storing to the Debug object causes the value stored to be 251 * displayed and otherwise has no effect -- see ACPI Specification 252 */ 253 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "**** Write to Debug Object: ****:\n\n")); 254 255 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %s: ", 256 AcpiUtGetTypeName (ValDesc->Common.Type))); 257 258 switch (ValDesc->Common.Type) 259 { 260 case ACPI_TYPE_INTEGER: 261 262 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "0x%X (%d)\n", 263 (UINT32) ValDesc->Integer.Value, (UINT32) ValDesc->Integer.Value)); 264 break; 265 266 267 case ACPI_TYPE_BUFFER: 268 269 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Length 0x%X\n", 270 (UINT32) ValDesc->Buffer.Length)); 271 break; 272 273 274 case ACPI_TYPE_STRING: 275 276 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "%s\n", ValDesc->String.Pointer)); 277 break; 278 279 280 case ACPI_TYPE_PACKAGE: 281 282 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Elements - 0x%X\n", 283 (UINT32) ValDesc->Package.Elements)); 284 break; 285 286 287 default: 288 289 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "@0x%p\n", ValDesc)); 290 break; 291 } 292 293 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INFO, "\n")); 294 break; 295 296 297 case AML_ZERO_OP: 298 case AML_ONE_OP: 299 case AML_ONES_OP: 300 case AML_REVISION_OP: 301 302 /* 303 * Storing to a constant is a no-op -- see ACPI Specification 304 * Delete the reference descriptor, however 305 */ 306 break; 307 308 309 default: 310 311 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Internal - Unknown Reference subtype %02x\n", 312 RefDesc->Reference.Opcode)); 313 314 /* TBD: [Restructure] use object dump routine !! */ 315 316 DUMP_BUFFER (RefDesc, sizeof (ACPI_OPERAND_OBJECT)); 317 318 Status = AE_AML_INTERNAL; 319 break; 320 321 } /* switch (RefDesc->Reference.Opcode) */ 322 323 324 /* Always delete the reference descriptor object */ 325 326 if (RefDesc) 327 { 328 AcpiUtRemoveReference (RefDesc); 329 } 330 331 return_ACPI_STATUS (Status); 332} 333 334 335/******************************************************************************* 336 * 337 * FUNCTION: AcpiExStoreObjectToIndex 338 * 339 * PARAMETERS: *ValDesc - Value to be stored 340 * *Node - Named object to receive the value 341 * 342 * RETURN: Status 343 * 344 * DESCRIPTION: Store the object to the named object. 345 * 346 ******************************************************************************/ 347 348ACPI_STATUS 349AcpiExStoreObjectToIndex ( 350 ACPI_OPERAND_OBJECT *ValDesc, 351 ACPI_OPERAND_OBJECT *DestDesc, 352 ACPI_WALK_STATE *WalkState) 353{ 354 ACPI_STATUS Status = AE_OK; 355 ACPI_OPERAND_OBJECT *ObjDesc; 356 UINT32 Length; 357 UINT32 i; 358 UINT8 Value = 0; 359 360 361 FUNCTION_TRACE ("ExStoreObjectToIndex"); 362 363 364 /* 365 * Destination must be a reference pointer, and 366 * must point to either a buffer or a package 367 */ 368 switch (DestDesc->Reference.TargetType) 369 { 370 case ACPI_TYPE_PACKAGE: 371 /* 372 * Storing to a package element is not simple. The source must be 373 * evaluated and converted to the type of the destination and then the 374 * source is copied into the destination - we can't just point to the 375 * source object. 376 */ 377 if (DestDesc->Reference.TargetType == ACPI_TYPE_PACKAGE) 378 { 379 /* 380 * The object at *(DestDesc->Reference.Where) is the 381 * element within the package that is to be modified. 382 */ 383 ObjDesc = *(DestDesc->Reference.Where); 384 if (ObjDesc) 385 { 386 /* 387 * If the Destination element is a package, we will delete 388 * that object and construct a new one. 389 * 390 * TBD: [Investigate] Should both the src and dest be required 391 * to be packages? 392 * && (ValDesc->Common.Type == ACPI_TYPE_PACKAGE) 393 */ 394 if (ObjDesc->Common.Type == ACPI_TYPE_PACKAGE) 395 { 396 /* 397 * Take away the reference for being part of a package and 398 * delete 399 */ 400 AcpiUtRemoveReference (ObjDesc); 401 AcpiUtRemoveReference (ObjDesc); 402 403 ObjDesc = NULL; 404 } 405 } 406 407 if (!ObjDesc) 408 { 409 /* 410 * If the ObjDesc is NULL, it means that an uninitialized package 411 * element has been used as a destination (this is OK), therefore, 412 * we must create the destination element to match the type of the 413 * source element NOTE: ValDesc can be of any type. 414 */ 415 ObjDesc = AcpiUtCreateInternalObject (ValDesc->Common.Type); 416 if (!ObjDesc) 417 { 418 return_ACPI_STATUS (AE_NO_MEMORY); 419 } 420 421 /* 422 * If the source is a package, copy the source to the new dest 423 */ 424 if (ACPI_TYPE_PACKAGE == ObjDesc->Common.Type) 425 { 426 Status = AcpiUtCopyIpackageToIpackage (ValDesc, ObjDesc, WalkState); 427 if (ACPI_FAILURE (Status)) 428 { 429 AcpiUtRemoveReference (ObjDesc); 430 return_ACPI_STATUS (Status); 431 } 432 } 433 434 /* 435 * Install the new descriptor into the package and add a 436 * reference to the newly created descriptor for now being 437 * part of the parent package 438 */ 439 *(DestDesc->Reference.Where) = ObjDesc; 440 AcpiUtAddReference (ObjDesc); 441 } 442 443 if (ACPI_TYPE_PACKAGE != ObjDesc->Common.Type) 444 { 445 /* 446 * The destination element is not a package, so we need to 447 * convert the contents of the source (ValDesc) and copy into 448 * the destination (ObjDesc) 449 */ 450 Status = AcpiExStoreObjectToObject (ValDesc, ObjDesc, 451 WalkState); 452 if (ACPI_FAILURE (Status)) 453 { 454 /* 455 * An error occurrered when copying the internal object 456 * so delete the reference. 457 */ 458 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 459 "Unable to copy the internal object\n")); 460 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 461 } 462 } 463 } 464 break; 465 466 467 case ACPI_TYPE_BUFFER_FIELD: 468 469 470 /* TBD: can probably call the generic Buffer/Field routines */ 471 472 /* 473 * Storing into a buffer at a location defined by an Index. 474 * 475 * Each 8-bit element of the source object is written to the 476 * 8-bit Buffer Field of the Index destination object. 477 */ 478 479 /* 480 * Set the ObjDesc to the destination object and type check. 481 */ 482 ObjDesc = DestDesc->Reference.Object; 483 if (ObjDesc->Common.Type != ACPI_TYPE_BUFFER) 484 { 485 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 486 } 487 488 /* 489 * The assignment of the individual elements will be slightly 490 * different for each source type. 491 */ 492 switch (ValDesc->Common.Type) 493 { 494 case ACPI_TYPE_INTEGER: 495 /* 496 * Type is Integer, assign bytewise 497 * This loop to assign each of the elements is somewhat 498 * backward because of the Big Endian-ness of IA-64 499 */ 500 Length = sizeof (ACPI_INTEGER); 501 for (i = Length; i != 0; i--) 502 { 503 Value = (UINT8)(ValDesc->Integer.Value >> (MUL_8 (i - 1))); 504 ObjDesc->Buffer.Pointer[DestDesc->Reference.Offset] = Value; 505 } 506 break; 507 508 509 case ACPI_TYPE_BUFFER: 510 /* 511 * Type is Buffer, the Length is in the structure. 512 * Just loop through the elements and assign each one in turn. 513 */ 514 Length = ValDesc->Buffer.Length; 515 for (i = 0; i < Length; i++) 516 { 517 Value = ValDesc->Buffer.Pointer[i]; 518 ObjDesc->Buffer.Pointer[DestDesc->Reference.Offset] = Value; 519 } 520 break; 521 522 523 case ACPI_TYPE_STRING: 524 /* 525 * Type is String, the Length is in the structure. 526 * Just loop through the elements and assign each one in turn. 527 */ 528 Length = ValDesc->String.Length; 529 for (i = 0; i < Length; i++) 530 { 531 Value = ValDesc->String.Pointer[i]; 532 ObjDesc->Buffer.Pointer[DestDesc->Reference.Offset] = Value; 533 } 534 break; 535 536 537 default: 538 539 /* Other types are invalid */ 540 541 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, 542 "Source must be Number/Buffer/String type, not %X\n", 543 ValDesc->Common.Type)); 544 Status = AE_AML_OPERAND_TYPE; 545 break; 546 } 547 break; 548 549 550 default: 551 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Target is not a Package or BufferField\n")); 552 Status = AE_AML_OPERAND_TYPE; 553 break; 554 } 555 556 557 return_ACPI_STATUS (Status); 558} 559 560 561/******************************************************************************* 562 * 563 * FUNCTION: AcpiExStoreObjectToNode 564 * 565 * PARAMETERS: *SourceDesc - Value to be stored 566 * *Node - Named object to receive the value 567 * 568 * RETURN: Status 569 * 570 * DESCRIPTION: Store the object to the named object. 571 * 572 * The Assignment of an object to a named object is handled here 573 * The val passed in will replace the current value (if any) 574 * with the input value. 575 * 576 * When storing into an object the data is converted to the 577 * target object type then stored in the object. This means 578 * that the target object type (for an initialized target) will 579 * not be changed by a store operation. 580 * 581 * NOTE: the global lock is acquired early. This will result 582 * in the global lock being held a bit longer. Also, if the 583 * function fails during set up we may get the lock when we 584 * don't really need it. I don't think we care. 585 * 586 ******************************************************************************/ 587 588ACPI_STATUS 589AcpiExStoreObjectToNode ( 590 ACPI_OPERAND_OBJECT *SourceDesc, 591 ACPI_NAMESPACE_NODE *Node, 592 ACPI_WALK_STATE *WalkState) 593{ 594 ACPI_STATUS Status = AE_OK; 595 ACPI_OPERAND_OBJECT *TargetDesc; 596 ACPI_OBJECT_TYPE8 TargetType = ACPI_TYPE_ANY; 597 598 599 FUNCTION_TRACE ("ExStoreObjectToNode"); 600 601 602 /* 603 * Assuming the parameters were already validated 604 */ 605 606 /* 607 * Get current type of the node, and object attached to Node 608 */ 609 TargetType = AcpiNsGetType (Node); 610 TargetDesc = AcpiNsGetAttachedObject (Node); 611 612 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Storing %p(%s) into node %p(%s)\n", 613 Node, AcpiUtGetTypeName (SourceDesc->Common.Type), 614 SourceDesc, AcpiUtGetTypeName (TargetType))); 615 616 617 /* 618 * Resolve the source object to an actual value 619 * (If it is a reference object) 620 */ 621 Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState); 622 if (ACPI_FAILURE (Status)) 623 { 624 return_ACPI_STATUS (Status); 625 } 626 627 628 /* 629 * Do the actual store operation 630 */ 631 switch (TargetType) 632 { 633 case ACPI_TYPE_BUFFER_FIELD: 634 case INTERNAL_TYPE_REGION_FIELD: 635 case INTERNAL_TYPE_BANK_FIELD: 636 case INTERNAL_TYPE_INDEX_FIELD: 637 638 /* 639 * For fields, copy the source data to the target field. 640 */ 641 Status = AcpiExWriteDataToField (SourceDesc, TargetDesc); 642 break; 643 644 645 case ACPI_TYPE_INTEGER: 646 case ACPI_TYPE_STRING: 647 case ACPI_TYPE_BUFFER: 648 649 /* 650 * These target types are all of type Integer/String/Buffer, and 651 * therefore support implicit conversion before the store. 652 * 653 * Copy and/or convert the source object to a new target object 654 */ 655 Status = AcpiExStoreObject (SourceDesc, TargetType, &TargetDesc, WalkState); 656 if (ACPI_FAILURE (Status)) 657 { 658 return_ACPI_STATUS (Status); 659 } 660 661 /* 662 * Store the new TargetDesc as the new value of the Name, and set 663 * the Name's type to that of the value being stored in it. 664 * SourceDesc reference count is incremented by AttachObject. 665 */ 666 Status = AcpiNsAttachObject (Node, TargetDesc, TargetType); 667 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 668 "Store %s into %s via Convert/Attach\n", 669 AcpiUtGetTypeName (TargetDesc->Common.Type), 670 AcpiUtGetTypeName (TargetType))); 671 break; 672 673 674 default: 675 676 /* No conversions for all other types. Just attach the source object */ 677 678 Status = AcpiNsAttachObject (Node, SourceDesc, SourceDesc->Common.Type); 679 680 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, 681 "Store %s into %s via Attach only\n", 682 AcpiUtGetTypeName (SourceDesc->Common.Type), 683 AcpiUtGetTypeName (SourceDesc->Common.Type))); 684 break; 685 } 686 687 688 return_ACPI_STATUS (Status); 689} 690 691 692/******************************************************************************* 693 * 694 * FUNCTION: AcpiExStoreObjectToObject 695 * 696 * PARAMETERS: *SourceDesc - Value to be stored 697 * *DestDesc - Object to receive the value 698 * 699 * RETURN: Status 700 * 701 * DESCRIPTION: Store an object to another object. 702 * 703 * The Assignment of an object to another (not named) object 704 * is handled here. 705 * The val passed in will replace the current value (if any) 706 * with the input value. 707 * 708 * When storing into an object the data is converted to the 709 * target object type then stored in the object. This means 710 * that the target object type (for an initialized target) will 711 * not be changed by a store operation. 712 * 713 * This module allows destination types of Number, String, 714 * and Buffer. 715 * 716 ******************************************************************************/ 717 718ACPI_STATUS 719AcpiExStoreObjectToObject ( 720 ACPI_OPERAND_OBJECT *SourceDesc, 721 ACPI_OPERAND_OBJECT *DestDesc, 722 ACPI_WALK_STATE *WalkState) 723{ 724 ACPI_STATUS Status = AE_OK; 725 ACPI_OBJECT_TYPE8 DestinationType = DestDesc->Common.Type; 726 727 728 FUNCTION_TRACE ("ExStoreObjectToObject"); 729 730 731 /* 732 * Assuming the parameters are valid! 733 */ 734 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Storing %p(%s) to %p(%s)\n", 735 SourceDesc, AcpiUtGetTypeName (SourceDesc->Common.Type), 736 DestDesc, AcpiUtGetTypeName (DestDesc->Common.Type))); 737 738 739 /* 740 * From this interface, we only support Integers/Strings/Buffers 741 */ 742 switch (DestinationType) 743 { 744 case ACPI_TYPE_INTEGER: 745 case ACPI_TYPE_STRING: 746 case ACPI_TYPE_BUFFER: 747 break; 748 749 default: 750 ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "Store into %s not implemented\n", 751 AcpiUtGetTypeName (DestDesc->Common.Type))); 752 753 return_ACPI_STATUS (AE_NOT_IMPLEMENTED); 754 } 755 756 757 /* 758 * Resolve the source object to an actual value 759 * (If it is a reference object) 760 */ 761 Status = AcpiExResolveObject (&SourceDesc, DestinationType, WalkState); 762 if (ACPI_FAILURE (Status)) 763 { 764 return_ACPI_STATUS (Status); 765 } 766 767 768 /* 769 * Copy and/or convert the source object to the destination object 770 */ 771 Status = AcpiExStoreObject (SourceDesc, DestinationType, &DestDesc, WalkState); 772 773 774 return_ACPI_STATUS (Status); 775} 776 777