dsmthdat.c revision 197104
11558Srgrimes/******************************************************************************* 21558Srgrimes * 31558Srgrimes * Module Name: dsmthdat - control method arguments and local variables 41558Srgrimes * 51558Srgrimes ******************************************************************************/ 61558Srgrimes 71558Srgrimes/****************************************************************************** 81558Srgrimes * 91558Srgrimes * 1. Copyright Notice 101558Srgrimes * 111558Srgrimes * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 121558Srgrimes * All rights reserved. 131558Srgrimes * 141558Srgrimes * 2. License 151558Srgrimes * 161558Srgrimes * 2.1. This is your license from Intel Corp. under its intellectual property 171558Srgrimes * 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#define __DSMTHDAT_C__ 117 118#include <contrib/dev/acpica/include/acpi.h> 119#include <contrib/dev/acpica/include/accommon.h> 120#include <contrib/dev/acpica/include/acdispat.h> 121#include <contrib/dev/acpica/include/acnamesp.h> 122#include <contrib/dev/acpica/include/acinterp.h> 123 124 125#define _COMPONENT ACPI_DISPATCHER 126 ACPI_MODULE_NAME ("dsmthdat") 127 128/* Local prototypes */ 129 130static void 131AcpiDsMethodDataDeleteValue ( 132 UINT8 Type, 133 UINT32 Index, 134 ACPI_WALK_STATE *WalkState); 135 136static ACPI_STATUS 137AcpiDsMethodDataSetValue ( 138 UINT8 Type, 139 UINT32 Index, 140 ACPI_OPERAND_OBJECT *Object, 141 ACPI_WALK_STATE *WalkState); 142 143#ifdef ACPI_OBSOLETE_FUNCTIONS 144ACPI_OBJECT_TYPE 145AcpiDsMethodDataGetType ( 146 UINT16 Opcode, 147 UINT32 Index, 148 ACPI_WALK_STATE *WalkState); 149#endif 150 151 152/******************************************************************************* 153 * 154 * FUNCTION: AcpiDsMethodDataInit 155 * 156 * PARAMETERS: WalkState - Current walk state object 157 * 158 * RETURN: Status 159 * 160 * DESCRIPTION: Initialize the data structures that hold the method's arguments 161 * and locals. The data struct is an array of namespace nodes for 162 * each - this allows RefOf and DeRefOf to work properly for these 163 * special data types. 164 * 165 * NOTES: WalkState fields are initialized to zero by the 166 * ACPI_ALLOCATE_ZEROED(). 167 * 168 * A pseudo-Namespace Node is assigned to each argument and local 169 * so that RefOf() can return a pointer to the Node. 170 * 171 ******************************************************************************/ 172 173void 174AcpiDsMethodDataInit ( 175 ACPI_WALK_STATE *WalkState) 176{ 177 UINT32 i; 178 179 180 ACPI_FUNCTION_TRACE (DsMethodDataInit); 181 182 183 /* Init the method arguments */ 184 185 for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) 186 { 187 ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name, NAMEOF_ARG_NTE); 188 WalkState->Arguments[i].Name.Integer |= (i << 24); 189 WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED; 190 WalkState->Arguments[i].Type = ACPI_TYPE_ANY; 191 WalkState->Arguments[i].Flags = 192 ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_ARG; 193 } 194 195 /* Init the method locals */ 196 197 for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) 198 { 199 ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name, NAMEOF_LOCAL_NTE); 200 201 WalkState->LocalVariables[i].Name.Integer |= (i << 24); 202 WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED; 203 WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY; 204 WalkState->LocalVariables[i].Flags = 205 ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL; 206 } 207 208 return_VOID; 209} 210 211 212/******************************************************************************* 213 * 214 * FUNCTION: AcpiDsMethodDataDeleteAll 215 * 216 * PARAMETERS: WalkState - Current walk state object 217 * 218 * RETURN: None 219 * 220 * DESCRIPTION: Delete method locals and arguments. Arguments are only 221 * deleted if this method was called from another method. 222 * 223 ******************************************************************************/ 224 225void 226AcpiDsMethodDataDeleteAll ( 227 ACPI_WALK_STATE *WalkState) 228{ 229 UINT32 Index; 230 231 232 ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll); 233 234 235 /* Detach the locals */ 236 237 for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++) 238 { 239 if (WalkState->LocalVariables[Index].Object) 240 { 241 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%d=%p\n", 242 Index, WalkState->LocalVariables[Index].Object)); 243 244 /* Detach object (if present) and remove a reference */ 245 246 AcpiNsDetachObject (&WalkState->LocalVariables[Index]); 247 } 248 } 249 250 /* Detach the arguments */ 251 252 for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++) 253 { 254 if (WalkState->Arguments[Index].Object) 255 { 256 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%d=%p\n", 257 Index, WalkState->Arguments[Index].Object)); 258 259 /* Detach object (if present) and remove a reference */ 260 261 AcpiNsDetachObject (&WalkState->Arguments[Index]); 262 } 263 } 264 265 return_VOID; 266} 267 268 269/******************************************************************************* 270 * 271 * FUNCTION: AcpiDsMethodDataInitArgs 272 * 273 * PARAMETERS: *Params - Pointer to a parameter list for the method 274 * MaxParamCount - The arg count for this method 275 * WalkState - Current walk state object 276 * 277 * RETURN: Status 278 * 279 * DESCRIPTION: Initialize arguments for a method. The parameter list is a list 280 * of ACPI operand objects, either null terminated or whose length 281 * is defined by MaxParamCount. 282 * 283 ******************************************************************************/ 284 285ACPI_STATUS 286AcpiDsMethodDataInitArgs ( 287 ACPI_OPERAND_OBJECT **Params, 288 UINT32 MaxParamCount, 289 ACPI_WALK_STATE *WalkState) 290{ 291 ACPI_STATUS Status; 292 UINT32 Index = 0; 293 294 295 ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params); 296 297 298 if (!Params) 299 { 300 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param list passed to method\n")); 301 return_ACPI_STATUS (AE_OK); 302 } 303 304 /* Copy passed parameters into the new method stack frame */ 305 306 while ((Index < ACPI_METHOD_NUM_ARGS) && 307 (Index < MaxParamCount) && 308 Params[Index]) 309 { 310 /* 311 * A valid parameter. 312 * Store the argument in the method/walk descriptor. 313 * Do not copy the arg in order to implement call by reference 314 */ 315 Status = AcpiDsMethodDataSetValue (ACPI_REFCLASS_ARG, Index, 316 Params[Index], WalkState); 317 if (ACPI_FAILURE (Status)) 318 { 319 return_ACPI_STATUS (Status); 320 } 321 322 Index++; 323 } 324 325 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%d args passed to method\n", Index)); 326 return_ACPI_STATUS (AE_OK); 327} 328 329 330/******************************************************************************* 331 * 332 * FUNCTION: AcpiDsMethodDataGetNode 333 * 334 * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or 335 * ACPI_REFCLASS_ARG 336 * Index - Which Local or Arg whose type to get 337 * WalkState - Current walk state object 338 * Node - Where the node is returned. 339 * 340 * RETURN: Status and node 341 * 342 * DESCRIPTION: Get the Node associated with a local or arg. 343 * 344 ******************************************************************************/ 345 346ACPI_STATUS 347AcpiDsMethodDataGetNode ( 348 UINT8 Type, 349 UINT32 Index, 350 ACPI_WALK_STATE *WalkState, 351 ACPI_NAMESPACE_NODE **Node) 352{ 353 ACPI_FUNCTION_TRACE (DsMethodDataGetNode); 354 355 356 /* 357 * Method Locals and Arguments are supported 358 */ 359 switch (Type) 360 { 361 case ACPI_REFCLASS_LOCAL: 362 363 if (Index > ACPI_METHOD_MAX_LOCAL) 364 { 365 ACPI_ERROR ((AE_INFO, 366 "Local index %d is invalid (max %d)", 367 Index, ACPI_METHOD_MAX_LOCAL)); 368 return_ACPI_STATUS (AE_AML_INVALID_INDEX); 369 } 370 371 /* Return a pointer to the pseudo-node */ 372 373 *Node = &WalkState->LocalVariables[Index]; 374 break; 375 376 case ACPI_REFCLASS_ARG: 377 378 if (Index > ACPI_METHOD_MAX_ARG) 379 { 380 ACPI_ERROR ((AE_INFO, 381 "Arg index %d is invalid (max %d)", 382 Index, ACPI_METHOD_MAX_ARG)); 383 return_ACPI_STATUS (AE_AML_INVALID_INDEX); 384 } 385 386 /* Return a pointer to the pseudo-node */ 387 388 *Node = &WalkState->Arguments[Index]; 389 break; 390 391 default: 392 ACPI_ERROR ((AE_INFO, "Type %d is invalid", Type)); 393 return_ACPI_STATUS (AE_TYPE); 394 } 395 396 return_ACPI_STATUS (AE_OK); 397} 398 399 400/******************************************************************************* 401 * 402 * FUNCTION: AcpiDsMethodDataSetValue 403 * 404 * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or 405 * ACPI_REFCLASS_ARG 406 * Index - Which Local or Arg to get 407 * Object - Object to be inserted into the stack entry 408 * WalkState - Current walk state object 409 * 410 * RETURN: Status 411 * 412 * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index. 413 * Note: There is no "implicit conversion" for locals. 414 * 415 ******************************************************************************/ 416 417static ACPI_STATUS 418AcpiDsMethodDataSetValue ( 419 UINT8 Type, 420 UINT32 Index, 421 ACPI_OPERAND_OBJECT *Object, 422 ACPI_WALK_STATE *WalkState) 423{ 424 ACPI_STATUS Status; 425 ACPI_NAMESPACE_NODE *Node; 426 427 428 ACPI_FUNCTION_TRACE (DsMethodDataSetValue); 429 430 431 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 432 "NewObj %p Type %2.2X, Refs=%d [%s]\n", Object, 433 Type, Object->Common.ReferenceCount, 434 AcpiUtGetTypeName (Object->Common.Type))); 435 436 /* Get the namespace node for the arg/local */ 437 438 Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); 439 if (ACPI_FAILURE (Status)) 440 { 441 return_ACPI_STATUS (Status); 442 } 443 444 /* 445 * Increment ref count so object can't be deleted while installed. 446 * NOTE: We do not copy the object in order to preserve the call by 447 * reference semantics of ACPI Control Method invocation. 448 * (See ACPI Specification 2.0C) 449 */ 450 AcpiUtAddReference (Object); 451 452 /* Install the object */ 453 454 Node->Object = Object; 455 return_ACPI_STATUS (Status); 456} 457 458 459/******************************************************************************* 460 * 461 * FUNCTION: AcpiDsMethodDataGetValue 462 * 463 * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or 464 * ACPI_REFCLASS_ARG 465 * Index - Which localVar or argument to get 466 * WalkState - Current walk state object 467 * DestDesc - Where Arg or Local value is returned 468 * 469 * RETURN: Status 470 * 471 * DESCRIPTION: Retrieve value of selected Arg or Local for this method 472 * Used only in AcpiExResolveToValue(). 473 * 474 ******************************************************************************/ 475 476ACPI_STATUS 477AcpiDsMethodDataGetValue ( 478 UINT8 Type, 479 UINT32 Index, 480 ACPI_WALK_STATE *WalkState, 481 ACPI_OPERAND_OBJECT **DestDesc) 482{ 483 ACPI_STATUS Status; 484 ACPI_NAMESPACE_NODE *Node; 485 ACPI_OPERAND_OBJECT *Object; 486 487 488 ACPI_FUNCTION_TRACE (DsMethodDataGetValue); 489 490 491 /* Validate the object descriptor */ 492 493 if (!DestDesc) 494 { 495 ACPI_ERROR ((AE_INFO, "Null object descriptor pointer")); 496 return_ACPI_STATUS (AE_BAD_PARAMETER); 497 } 498 499 /* Get the namespace node for the arg/local */ 500 501 Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); 502 if (ACPI_FAILURE (Status)) 503 { 504 return_ACPI_STATUS (Status); 505 } 506 507 /* Get the object from the node */ 508 509 Object = Node->Object; 510 511 /* Examine the returned object, it must be valid. */ 512 513 if (!Object) 514 { 515 /* 516 * Index points to uninitialized object. 517 * This means that either 1) The expected argument was 518 * not passed to the method, or 2) A local variable 519 * was referenced by the method (via the ASL) 520 * before it was initialized. Either case is an error. 521 */ 522 523 /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */ 524 525 if (AcpiGbl_EnableInterpreterSlack) 526 { 527 Object = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 528 if (!Object) 529 { 530 return_ACPI_STATUS (AE_NO_MEMORY); 531 } 532 533 Object->Integer.Value = 0; 534 Node->Object = Object; 535 } 536 537 /* Otherwise, return the error */ 538 539 else switch (Type) 540 { 541 case ACPI_REFCLASS_ARG: 542 543 ACPI_ERROR ((AE_INFO, 544 "Uninitialized Arg[%d] at node %p", 545 Index, Node)); 546 547 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG); 548 549 case ACPI_REFCLASS_LOCAL: 550 551 /* 552 * No error message for this case, will be trapped again later to 553 * detect and ignore cases of Store(LocalX,LocalX) 554 */ 555 return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL); 556 557 default: 558 559 ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: %X", Type)); 560 return_ACPI_STATUS (AE_AML_INTERNAL); 561 } 562 } 563 564 /* 565 * The Index points to an initialized and valid object. 566 * Return an additional reference to the object 567 */ 568 *DestDesc = Object; 569 AcpiUtAddReference (Object); 570 571 return_ACPI_STATUS (AE_OK); 572} 573 574 575/******************************************************************************* 576 * 577 * FUNCTION: AcpiDsMethodDataDeleteValue 578 * 579 * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or 580 * ACPI_REFCLASS_ARG 581 * Index - Which localVar or argument to delete 582 * WalkState - Current walk state object 583 * 584 * RETURN: None 585 * 586 * DESCRIPTION: Delete the entry at Opcode:Index. Inserts 587 * a null into the stack slot after the object is deleted. 588 * 589 ******************************************************************************/ 590 591static void 592AcpiDsMethodDataDeleteValue ( 593 UINT8 Type, 594 UINT32 Index, 595 ACPI_WALK_STATE *WalkState) 596{ 597 ACPI_STATUS Status; 598 ACPI_NAMESPACE_NODE *Node; 599 ACPI_OPERAND_OBJECT *Object; 600 601 602 ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue); 603 604 605 /* Get the namespace node for the arg/local */ 606 607 Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); 608 if (ACPI_FAILURE (Status)) 609 { 610 return_VOID; 611 } 612 613 /* Get the associated object */ 614 615 Object = AcpiNsGetAttachedObject (Node); 616 617 /* 618 * Undefine the Arg or Local by setting its descriptor 619 * pointer to NULL. Locals/Args can contain both 620 * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs 621 */ 622 Node->Object = NULL; 623 624 if ((Object) && 625 (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND)) 626 { 627 /* 628 * There is a valid object. 629 * Decrement the reference count by one to balance the 630 * increment when the object was stored. 631 */ 632 AcpiUtRemoveReference (Object); 633 } 634 635 return_VOID; 636} 637 638 639/******************************************************************************* 640 * 641 * FUNCTION: AcpiDsStoreObjectToLocal 642 * 643 * PARAMETERS: Type - Either ACPI_REFCLASS_LOCAL or 644 * ACPI_REFCLASS_ARG 645 * Index - Which Local or Arg to set 646 * ObjDesc - Value to be stored 647 * WalkState - Current walk state 648 * 649 * RETURN: Status 650 * 651 * DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed 652 * as the new value for the Arg or Local and the reference count 653 * for ObjDesc is incremented. 654 * 655 ******************************************************************************/ 656 657ACPI_STATUS 658AcpiDsStoreObjectToLocal ( 659 UINT8 Type, 660 UINT32 Index, 661 ACPI_OPERAND_OBJECT *ObjDesc, 662 ACPI_WALK_STATE *WalkState) 663{ 664 ACPI_STATUS Status; 665 ACPI_NAMESPACE_NODE *Node; 666 ACPI_OPERAND_OBJECT *CurrentObjDesc; 667 ACPI_OPERAND_OBJECT *NewObjDesc; 668 669 670 ACPI_FUNCTION_TRACE (DsStoreObjectToLocal); 671 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Type=%2.2X Index=%d Obj=%p\n", 672 Type, Index, ObjDesc)); 673 674 /* Parameter validation */ 675 676 if (!ObjDesc) 677 { 678 return_ACPI_STATUS (AE_BAD_PARAMETER); 679 } 680 681 /* Get the namespace node for the arg/local */ 682 683 Status = AcpiDsMethodDataGetNode (Type, Index, WalkState, &Node); 684 if (ACPI_FAILURE (Status)) 685 { 686 return_ACPI_STATUS (Status); 687 } 688 689 CurrentObjDesc = AcpiNsGetAttachedObject (Node); 690 if (CurrentObjDesc == ObjDesc) 691 { 692 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n", 693 ObjDesc)); 694 return_ACPI_STATUS (Status); 695 } 696 697 /* 698 * If the reference count on the object is more than one, we must 699 * take a copy of the object before we store. A reference count 700 * of exactly 1 means that the object was just created during the 701 * evaluation of an expression, and we can safely use it since it 702 * is not used anywhere else. 703 */ 704 NewObjDesc = ObjDesc; 705 if (ObjDesc->Common.ReferenceCount > 1) 706 { 707 Status = AcpiUtCopyIobjectToIobject (ObjDesc, &NewObjDesc, WalkState); 708 if (ACPI_FAILURE (Status)) 709 { 710 return_ACPI_STATUS (Status); 711 } 712 } 713 714 /* 715 * If there is an object already in this slot, we either 716 * have to delete it, or if this is an argument and there 717 * is an object reference stored there, we have to do 718 * an indirect store! 719 */ 720 if (CurrentObjDesc) 721 { 722 /* 723 * Check for an indirect store if an argument 724 * contains an object reference (stored as an Node). 725 * We don't allow this automatic dereferencing for 726 * locals, since a store to a local should overwrite 727 * anything there, including an object reference. 728 * 729 * If both Arg0 and Local0 contain RefOf (Local4): 730 * 731 * Store (1, Arg0) - Causes indirect store to local4 732 * Store (1, Local0) - Stores 1 in local0, overwriting 733 * the reference to local4 734 * Store (1, DeRefof (Local0)) - Causes indirect store to local4 735 * 736 * Weird, but true. 737 */ 738 if (Type == ACPI_REFCLASS_ARG) 739 { 740 /* 741 * If we have a valid reference object that came from RefOf(), 742 * do the indirect store 743 */ 744 if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) == ACPI_DESC_TYPE_OPERAND) && 745 (CurrentObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) && 746 (CurrentObjDesc->Reference.Class == ACPI_REFCLASS_REFOF)) 747 { 748 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 749 "Arg (%p) is an ObjRef(Node), storing in node %p\n", 750 NewObjDesc, CurrentObjDesc)); 751 752 /* 753 * Store this object to the Node (perform the indirect store) 754 * NOTE: No implicit conversion is performed, as per the ACPI 755 * specification rules on storing to Locals/Args. 756 */ 757 Status = AcpiExStoreObjectToNode (NewObjDesc, 758 CurrentObjDesc->Reference.Object, WalkState, 759 ACPI_NO_IMPLICIT_CONVERSION); 760 761 /* Remove local reference if we copied the object above */ 762 763 if (NewObjDesc != ObjDesc) 764 { 765 AcpiUtRemoveReference (NewObjDesc); 766 } 767 return_ACPI_STATUS (Status); 768 } 769 } 770 771 /* Delete the existing object before storing the new one */ 772 773 AcpiDsMethodDataDeleteValue (Type, Index, WalkState); 774 } 775 776 /* 777 * Install the Obj descriptor (*NewObjDesc) into 778 * the descriptor for the Arg or Local. 779 * (increments the object reference count by one) 780 */ 781 Status = AcpiDsMethodDataSetValue (Type, Index, NewObjDesc, WalkState); 782 783 /* Remove local reference if we copied the object above */ 784 785 if (NewObjDesc != ObjDesc) 786 { 787 AcpiUtRemoveReference (NewObjDesc); 788 } 789 790 return_ACPI_STATUS (Status); 791} 792 793 794#ifdef ACPI_OBSOLETE_FUNCTIONS 795/******************************************************************************* 796 * 797 * FUNCTION: AcpiDsMethodDataGetType 798 * 799 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 800 * Index - Which Local or Arg whose type to get 801 * WalkState - Current walk state object 802 * 803 * RETURN: Data type of current value of the selected Arg or Local 804 * 805 * DESCRIPTION: Get the type of the object stored in the Local or Arg 806 * 807 ******************************************************************************/ 808 809ACPI_OBJECT_TYPE 810AcpiDsMethodDataGetType ( 811 UINT16 Opcode, 812 UINT32 Index, 813 ACPI_WALK_STATE *WalkState) 814{ 815 ACPI_STATUS Status; 816 ACPI_NAMESPACE_NODE *Node; 817 ACPI_OPERAND_OBJECT *Object; 818 819 820 ACPI_FUNCTION_TRACE (DsMethodDataGetType); 821 822 823 /* Get the namespace node for the arg/local */ 824 825 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 826 if (ACPI_FAILURE (Status)) 827 { 828 return_VALUE ((ACPI_TYPE_NOT_FOUND)); 829 } 830 831 /* Get the object */ 832 833 Object = AcpiNsGetAttachedObject (Node); 834 if (!Object) 835 { 836 /* Uninitialized local/arg, return TYPE_ANY */ 837 838 return_VALUE (ACPI_TYPE_ANY); 839 } 840 841 /* Get the object type */ 842 843 return_VALUE (Object->Type); 844} 845#endif 846 847 848