exstore.c revision 193267
1 2/****************************************************************************** 3 * 4 * Module Name: exstore - AML Interpreter object store support 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2009, 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 __EXSTORE_C__ 118 119#include "acpi.h" 120#include "accommon.h" 121#include "acdispat.h" 122#include "acinterp.h" 123#include "amlcode.h" 124#include "acnamesp.h" 125 126 127#define _COMPONENT ACPI_EXECUTER 128 ACPI_MODULE_NAME ("exstore") 129 130/* Local prototypes */ 131 132static void 133AcpiExDoDebugObject ( 134 ACPI_OPERAND_OBJECT *SourceDesc, 135 UINT32 Level, 136 UINT32 Index); 137 138static ACPI_STATUS 139AcpiExStoreObjectToIndex ( 140 ACPI_OPERAND_OBJECT *ValDesc, 141 ACPI_OPERAND_OBJECT *DestDesc, 142 ACPI_WALK_STATE *WalkState); 143 144 145/******************************************************************************* 146 * 147 * FUNCTION: AcpiExDoDebugObject 148 * 149 * PARAMETERS: SourceDesc - Value to be stored 150 * Level - Indentation level (used for packages) 151 * Index - Current package element, zero if not pkg 152 * 153 * RETURN: None 154 * 155 * DESCRIPTION: Handles stores to the Debug Object. 156 * 157 ******************************************************************************/ 158 159static void 160AcpiExDoDebugObject ( 161 ACPI_OPERAND_OBJECT *SourceDesc, 162 UINT32 Level, 163 UINT32 Index) 164{ 165 UINT32 i; 166 167 168 ACPI_FUNCTION_TRACE_PTR (ExDoDebugObject, SourceDesc); 169 170 171 /* Print line header as long as we are not in the middle of an object display */ 172 173 if (!((Level > 0) && Index == 0)) 174 { 175 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[ACPI Debug] %*s", 176 Level, " ")); 177 } 178 179 /* Display index for package output only */ 180 181 if (Index > 0) 182 { 183 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, 184 "(%.2u) ", Index -1)); 185 } 186 187 if (!SourceDesc) 188 { 189 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[Null Object]\n")); 190 return_VOID; 191 } 192 193 if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc) == ACPI_DESC_TYPE_OPERAND) 194 { 195 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "%s ", 196 AcpiUtGetObjectTypeName (SourceDesc))); 197 198 if (!AcpiUtValidInternalObject (SourceDesc)) 199 { 200 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, 201 "%p, Invalid Internal Object!\n", SourceDesc)); 202 return_VOID; 203 } 204 } 205 else if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc) == ACPI_DESC_TYPE_NAMED) 206 { 207 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "%s: %p\n", 208 AcpiUtGetTypeName (((ACPI_NAMESPACE_NODE *) SourceDesc)->Type), 209 SourceDesc)); 210 return_VOID; 211 } 212 else 213 { 214 return_VOID; 215 } 216 217 /* SourceDesc is of type ACPI_DESC_TYPE_OPERAND */ 218 219 switch (SourceDesc->Common.Type) 220 { 221 case ACPI_TYPE_INTEGER: 222 223 /* Output correct integer width */ 224 225 if (AcpiGbl_IntegerByteWidth == 4) 226 { 227 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "0x%8.8X\n", 228 (UINT32) SourceDesc->Integer.Value)); 229 } 230 else 231 { 232 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "0x%8.8X%8.8X\n", 233 ACPI_FORMAT_UINT64 (SourceDesc->Integer.Value))); 234 } 235 break; 236 237 case ACPI_TYPE_BUFFER: 238 239 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[0x%.2X]\n", 240 (UINT32) SourceDesc->Buffer.Length)); 241 ACPI_DUMP_BUFFER (SourceDesc->Buffer.Pointer, 242 (SourceDesc->Buffer.Length < 256) ? SourceDesc->Buffer.Length : 256); 243 break; 244 245 case ACPI_TYPE_STRING: 246 247 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[0x%.2X] \"%s\"\n", 248 SourceDesc->String.Length, SourceDesc->String.Pointer)); 249 break; 250 251 case ACPI_TYPE_PACKAGE: 252 253 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[Contains 0x%.2X Elements]\n", 254 SourceDesc->Package.Count)); 255 256 /* Output the entire contents of the package */ 257 258 for (i = 0; i < SourceDesc->Package.Count; i++) 259 { 260 AcpiExDoDebugObject (SourceDesc->Package.Elements[i], 261 Level+4, i+1); 262 } 263 break; 264 265 case ACPI_TYPE_LOCAL_REFERENCE: 266 267 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "[%s] ", 268 AcpiUtGetReferenceName (SourceDesc))); 269 270 /* Decode the reference */ 271 272 switch (SourceDesc->Reference.Class) 273 { 274 case ACPI_REFCLASS_INDEX: 275 276 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "0x%X\n", 277 SourceDesc->Reference.Value)); 278 break; 279 280 case ACPI_REFCLASS_TABLE: 281 282 /* Case for DdbHandle */ 283 284 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Table Index 0x%X\n", 285 SourceDesc->Reference.Value)); 286 return; 287 288 default: 289 break; 290 } 291 292 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, " ")); 293 294 /* Check for valid node first, then valid object */ 295 296 if (SourceDesc->Reference.Node) 297 { 298 if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc->Reference.Node) != 299 ACPI_DESC_TYPE_NAMED) 300 { 301 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, 302 " %p - Not a valid namespace node\n", 303 SourceDesc->Reference.Node)); 304 } 305 else 306 { 307 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "Node %p [%4.4s] ", 308 SourceDesc->Reference.Node, (SourceDesc->Reference.Node)->Name.Ascii)); 309 310 switch ((SourceDesc->Reference.Node)->Type) 311 { 312 /* These types have no attached object */ 313 314 case ACPI_TYPE_DEVICE: 315 AcpiOsPrintf ("Device\n"); 316 break; 317 318 case ACPI_TYPE_THERMAL: 319 AcpiOsPrintf ("Thermal Zone\n"); 320 break; 321 322 default: 323 AcpiExDoDebugObject ((SourceDesc->Reference.Node)->Object, 324 Level+4, 0); 325 break; 326 } 327 } 328 } 329 else if (SourceDesc->Reference.Object) 330 { 331 if (ACPI_GET_DESCRIPTOR_TYPE (SourceDesc->Reference.Object) == 332 ACPI_DESC_TYPE_NAMED) 333 { 334 AcpiExDoDebugObject (((ACPI_NAMESPACE_NODE *) 335 SourceDesc->Reference.Object)->Object, 336 Level+4, 0); 337 } 338 else 339 { 340 AcpiExDoDebugObject (SourceDesc->Reference.Object, Level+4, 0); 341 } 342 } 343 break; 344 345 default: 346 347 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_DEBUG_OBJECT, "%p\n", 348 SourceDesc)); 349 break; 350 } 351 352 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_EXEC, "\n")); 353 return_VOID; 354} 355 356 357/******************************************************************************* 358 * 359 * FUNCTION: AcpiExStore 360 * 361 * PARAMETERS: *SourceDesc - Value to be stored 362 * *DestDesc - Where to store it. Must be an NS node 363 * or an ACPI_OPERAND_OBJECT of type 364 * Reference; 365 * WalkState - Current walk state 366 * 367 * RETURN: Status 368 * 369 * DESCRIPTION: Store the value described by SourceDesc into the location 370 * described by DestDesc. Called by various interpreter 371 * functions to store the result of an operation into 372 * the destination operand -- not just simply the actual "Store" 373 * ASL operator. 374 * 375 ******************************************************************************/ 376 377ACPI_STATUS 378AcpiExStore ( 379 ACPI_OPERAND_OBJECT *SourceDesc, 380 ACPI_OPERAND_OBJECT *DestDesc, 381 ACPI_WALK_STATE *WalkState) 382{ 383 ACPI_STATUS Status = AE_OK; 384 ACPI_OPERAND_OBJECT *RefDesc = DestDesc; 385 386 387 ACPI_FUNCTION_TRACE_PTR (ExStore, DestDesc); 388 389 390 /* Validate parameters */ 391 392 if (!SourceDesc || !DestDesc) 393 { 394 ACPI_ERROR ((AE_INFO, "Null parameter")); 395 return_ACPI_STATUS (AE_AML_NO_OPERAND); 396 } 397 398 /* DestDesc can be either a namespace node or an ACPI object */ 399 400 if (ACPI_GET_DESCRIPTOR_TYPE (DestDesc) == ACPI_DESC_TYPE_NAMED) 401 { 402 /* 403 * Dest is a namespace node, 404 * Storing an object into a Named node. 405 */ 406 Status = AcpiExStoreObjectToNode (SourceDesc, 407 (ACPI_NAMESPACE_NODE *) DestDesc, WalkState, 408 ACPI_IMPLICIT_CONVERSION); 409 410 return_ACPI_STATUS (Status); 411 } 412 413 /* Destination object must be a Reference or a Constant object */ 414 415 switch (DestDesc->Common.Type) 416 { 417 case ACPI_TYPE_LOCAL_REFERENCE: 418 break; 419 420 case ACPI_TYPE_INTEGER: 421 422 /* Allow stores to Constants -- a Noop as per ACPI spec */ 423 424 if (DestDesc->Common.Flags & AOPOBJ_AML_CONSTANT) 425 { 426 return_ACPI_STATUS (AE_OK); 427 } 428 429 /*lint -fallthrough */ 430 431 default: 432 433 /* Destination is not a Reference object */ 434 435 ACPI_ERROR ((AE_INFO, 436 "Target is not a Reference or Constant object - %s [%p]", 437 AcpiUtGetObjectTypeName (DestDesc), DestDesc)); 438 439 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 440 } 441 442 /* 443 * Examine the Reference class. These cases are handled: 444 * 445 * 1) Store to Name (Change the object associated with a name) 446 * 2) Store to an indexed area of a Buffer or Package 447 * 3) Store to a Method Local or Arg 448 * 4) Store to the debug object 449 */ 450 switch (RefDesc->Reference.Class) 451 { 452 case ACPI_REFCLASS_REFOF: 453 454 /* Storing an object into a Name "container" */ 455 456 Status = AcpiExStoreObjectToNode (SourceDesc, 457 RefDesc->Reference.Object, 458 WalkState, ACPI_IMPLICIT_CONVERSION); 459 break; 460 461 462 case ACPI_REFCLASS_INDEX: 463 464 /* Storing to an Index (pointer into a packager or buffer) */ 465 466 Status = AcpiExStoreObjectToIndex (SourceDesc, RefDesc, WalkState); 467 break; 468 469 470 case ACPI_REFCLASS_LOCAL: 471 case ACPI_REFCLASS_ARG: 472 473 /* Store to a method local/arg */ 474 475 Status = AcpiDsStoreObjectToLocal (RefDesc->Reference.Class, 476 RefDesc->Reference.Value, SourceDesc, WalkState); 477 break; 478 479 480 case ACPI_REFCLASS_DEBUG: 481 482 /* 483 * Storing to the Debug object causes the value stored to be 484 * displayed and otherwise has no effect -- see ACPI Specification 485 */ 486 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 487 "**** Write to Debug Object: Object %p %s ****:\n\n", 488 SourceDesc, AcpiUtGetObjectTypeName (SourceDesc))); 489 490 AcpiExDoDebugObject (SourceDesc, 0, 0); 491 break; 492 493 494 default: 495 496 ACPI_ERROR ((AE_INFO, "Unknown Reference Class %2.2X", 497 RefDesc->Reference.Class)); 498 ACPI_DUMP_ENTRY (RefDesc, ACPI_LV_INFO); 499 500 Status = AE_AML_INTERNAL; 501 break; 502 } 503 504 return_ACPI_STATUS (Status); 505} 506 507 508/******************************************************************************* 509 * 510 * FUNCTION: AcpiExStoreObjectToIndex 511 * 512 * PARAMETERS: *SourceDesc - Value to be stored 513 * *DestDesc - Named object to receive the value 514 * WalkState - Current walk state 515 * 516 * RETURN: Status 517 * 518 * DESCRIPTION: Store the object to indexed Buffer or Package element 519 * 520 ******************************************************************************/ 521 522static ACPI_STATUS 523AcpiExStoreObjectToIndex ( 524 ACPI_OPERAND_OBJECT *SourceDesc, 525 ACPI_OPERAND_OBJECT *IndexDesc, 526 ACPI_WALK_STATE *WalkState) 527{ 528 ACPI_STATUS Status = AE_OK; 529 ACPI_OPERAND_OBJECT *ObjDesc; 530 ACPI_OPERAND_OBJECT *NewDesc; 531 UINT8 Value = 0; 532 UINT32 i; 533 534 535 ACPI_FUNCTION_TRACE (ExStoreObjectToIndex); 536 537 538 /* 539 * Destination must be a reference pointer, and 540 * must point to either a buffer or a package 541 */ 542 switch (IndexDesc->Reference.TargetType) 543 { 544 case ACPI_TYPE_PACKAGE: 545 /* 546 * Storing to a package element. Copy the object and replace 547 * any existing object with the new object. No implicit 548 * conversion is performed. 549 * 550 * The object at *(IndexDesc->Reference.Where) is the 551 * element within the package that is to be modified. 552 * The parent package object is at IndexDesc->Reference.Object 553 */ 554 ObjDesc = *(IndexDesc->Reference.Where); 555 556 if (SourceDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE && 557 SourceDesc->Reference.Class == ACPI_REFCLASS_TABLE) 558 { 559 /* This is a DDBHandle, just add a reference to it */ 560 561 AcpiUtAddReference (SourceDesc); 562 NewDesc = SourceDesc; 563 } 564 else 565 { 566 /* Normal object, copy it */ 567 568 Status = AcpiUtCopyIobjectToIobject (SourceDesc, &NewDesc, WalkState); 569 if (ACPI_FAILURE (Status)) 570 { 571 return_ACPI_STATUS (Status); 572 } 573 } 574 575 if (ObjDesc) 576 { 577 /* Decrement reference count by the ref count of the parent package */ 578 579 for (i = 0; 580 i < ((ACPI_OPERAND_OBJECT *) 581 IndexDesc->Reference.Object)->Common.ReferenceCount; 582 i++) 583 { 584 AcpiUtRemoveReference (ObjDesc); 585 } 586 } 587 588 *(IndexDesc->Reference.Where) = NewDesc; 589 590 /* Increment ref count by the ref count of the parent package-1 */ 591 592 for (i = 1; 593 i < ((ACPI_OPERAND_OBJECT *) 594 IndexDesc->Reference.Object)->Common.ReferenceCount; 595 i++) 596 { 597 AcpiUtAddReference (NewDesc); 598 } 599 600 break; 601 602 603 case ACPI_TYPE_BUFFER_FIELD: 604 605 /* 606 * Store into a Buffer or String (not actually a real BufferField) 607 * at a location defined by an Index. 608 * 609 * The first 8-bit element of the source object is written to the 610 * 8-bit Buffer location defined by the Index destination object, 611 * according to the ACPI 2.0 specification. 612 */ 613 614 /* 615 * Make sure the target is a Buffer or String. An error should 616 * not happen here, since the ReferenceObject was constructed 617 * by the INDEX_OP code. 618 */ 619 ObjDesc = IndexDesc->Reference.Object; 620 if ((ObjDesc->Common.Type != ACPI_TYPE_BUFFER) && 621 (ObjDesc->Common.Type != ACPI_TYPE_STRING)) 622 { 623 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 624 } 625 626 /* 627 * The assignment of the individual elements will be slightly 628 * different for each source type. 629 */ 630 switch (SourceDesc->Common.Type) 631 { 632 case ACPI_TYPE_INTEGER: 633 634 /* Use the least-significant byte of the integer */ 635 636 Value = (UINT8) (SourceDesc->Integer.Value); 637 break; 638 639 case ACPI_TYPE_BUFFER: 640 case ACPI_TYPE_STRING: 641 642 /* Note: Takes advantage of common string/buffer fields */ 643 644 Value = SourceDesc->Buffer.Pointer[0]; 645 break; 646 647 default: 648 649 /* All other types are invalid */ 650 651 ACPI_ERROR ((AE_INFO, 652 "Source must be Integer/Buffer/String type, not %s", 653 AcpiUtGetObjectTypeName (SourceDesc))); 654 return_ACPI_STATUS (AE_AML_OPERAND_TYPE); 655 } 656 657 /* Store the source value into the target buffer byte */ 658 659 ObjDesc->Buffer.Pointer[IndexDesc->Reference.Value] = Value; 660 break; 661 662 663 default: 664 ACPI_ERROR ((AE_INFO, 665 "Target is not a Package or BufferField")); 666 Status = AE_AML_OPERAND_TYPE; 667 break; 668 } 669 670 return_ACPI_STATUS (Status); 671} 672 673 674/******************************************************************************* 675 * 676 * FUNCTION: AcpiExStoreObjectToNode 677 * 678 * PARAMETERS: SourceDesc - Value to be stored 679 * Node - Named object to receive the value 680 * WalkState - Current walk state 681 * ImplicitConversion - Perform implicit conversion (yes/no) 682 * 683 * RETURN: Status 684 * 685 * DESCRIPTION: Store the object to the named object. 686 * 687 * The Assignment of an object to a named object is handled here 688 * The value passed in will replace the current value (if any) 689 * with the input value. 690 * 691 * When storing into an object the data is converted to the 692 * target object type then stored in the object. This means 693 * that the target object type (for an initialized target) will 694 * not be changed by a store operation. 695 * 696 * Assumes parameters are already validated. 697 * 698 ******************************************************************************/ 699 700ACPI_STATUS 701AcpiExStoreObjectToNode ( 702 ACPI_OPERAND_OBJECT *SourceDesc, 703 ACPI_NAMESPACE_NODE *Node, 704 ACPI_WALK_STATE *WalkState, 705 UINT8 ImplicitConversion) 706{ 707 ACPI_STATUS Status = AE_OK; 708 ACPI_OPERAND_OBJECT *TargetDesc; 709 ACPI_OPERAND_OBJECT *NewDesc; 710 ACPI_OBJECT_TYPE TargetType; 711 712 713 ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc); 714 715 716 /* Get current type of the node, and object attached to Node */ 717 718 TargetType = AcpiNsGetType (Node); 719 TargetDesc = AcpiNsGetAttachedObject (Node); 720 721 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n", 722 SourceDesc, AcpiUtGetObjectTypeName (SourceDesc), 723 Node, AcpiUtGetTypeName (TargetType))); 724 725 /* 726 * Resolve the source object to an actual value 727 * (If it is a reference object) 728 */ 729 Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState); 730 if (ACPI_FAILURE (Status)) 731 { 732 return_ACPI_STATUS (Status); 733 } 734 735 /* If no implicit conversion, drop into the default case below */ 736 737 if ((!ImplicitConversion) || 738 ((WalkState->Opcode == AML_COPY_OP) && 739 (TargetType != ACPI_TYPE_LOCAL_REGION_FIELD) && 740 (TargetType != ACPI_TYPE_LOCAL_BANK_FIELD) && 741 (TargetType != ACPI_TYPE_LOCAL_INDEX_FIELD))) 742 { 743 /* 744 * Force execution of default (no implicit conversion). Note: 745 * CopyObject does not perform an implicit conversion, as per the ACPI 746 * spec -- except in case of region/bank/index fields -- because these 747 * objects must retain their original type permanently. 748 */ 749 TargetType = ACPI_TYPE_ANY; 750 } 751 752 /* Do the actual store operation */ 753 754 switch (TargetType) 755 { 756 case ACPI_TYPE_BUFFER_FIELD: 757 case ACPI_TYPE_LOCAL_REGION_FIELD: 758 case ACPI_TYPE_LOCAL_BANK_FIELD: 759 case ACPI_TYPE_LOCAL_INDEX_FIELD: 760 761 /* For fields, copy the source data to the target field. */ 762 763 Status = AcpiExWriteDataToField (SourceDesc, TargetDesc, 764 &WalkState->ResultObj); 765 break; 766 767 768 case ACPI_TYPE_INTEGER: 769 case ACPI_TYPE_STRING: 770 case ACPI_TYPE_BUFFER: 771 772 /* 773 * These target types are all of type Integer/String/Buffer, and 774 * therefore support implicit conversion before the store. 775 * 776 * Copy and/or convert the source object to a new target object 777 */ 778 Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc, 779 &NewDesc, WalkState); 780 if (ACPI_FAILURE (Status)) 781 { 782 return_ACPI_STATUS (Status); 783 } 784 785 if (NewDesc != TargetDesc) 786 { 787 /* 788 * Store the new NewDesc as the new value of the Name, and set 789 * the Name's type to that of the value being stored in it. 790 * SourceDesc reference count is incremented by AttachObject. 791 * 792 * Note: This may change the type of the node if an explicit store 793 * has been performed such that the node/object type has been 794 * changed. 795 */ 796 Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type); 797 798 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 799 "Store %s into %s via Convert/Attach\n", 800 AcpiUtGetObjectTypeName (SourceDesc), 801 AcpiUtGetObjectTypeName (NewDesc))); 802 } 803 break; 804 805 806 default: 807 808 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 809 "Storing %s (%p) directly into node (%p) with no implicit conversion\n", 810 AcpiUtGetObjectTypeName (SourceDesc), SourceDesc, Node)); 811 812 /* No conversions for all other types. Just attach the source object */ 813 814 Status = AcpiNsAttachObject (Node, SourceDesc, 815 SourceDesc->Common.Type); 816 break; 817 } 818 819 return_ACPI_STATUS (Status); 820} 821 822 823