dsmthdat.c revision 167802
122347Spst/******************************************************************************* 222347Spst * 322347Spst * Module Name: dsmthdat - control method arguments and local variables 429964Sache * $Revision: 1.92 $ 529964Sache * 622347Spst ******************************************************************************/ 722347Spst 822347Spst/****************************************************************************** 922347Spst * 1022347Spst * 1. Copyright Notice 1122347Spst * 1222347Spst * Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp. 1322347Spst * All rights reserved. 1422347Spst * 1522347Spst * 2. License 1622347Spst * 1722347Spst * 2.1. This is your license from Intel Corp. under its intellectual property 1822347Spst * rights. You may have additional license terms from the party that provided 1922347Spst * you this software, covering your right to use that party's intellectual 2022347Spst * property rights. 2122347Spst * 2222347Spst * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 2322347Spst * copy of the source code appearing in this file ("Covered Code") an 2422347Spst * irrevocable, perpetual, worldwide license under Intel's copyrights in the 2522347Spst * base code distributed originally by Intel ("Original Intel Code") to copy, 2622347Spst * make derivatives, distribute, use and display any portion of the Covered 2722347Spst * Code in any form, with the right to sublicense such rights; and 2822347Spst * 2922347Spst * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 3022347Spst * license (with the right to sublicense), under only those claims of Intel 3122347Spst * patents that are infringed by the Original Intel Code, to make, use, sell, 3222347Spst * offer to sell, and import the Covered Code and derivative works thereof 3322347Spst * solely to the minimum extent necessary to exercise the above copyright 3422347Spst * license, and in no event shall the patent license extend to any additions 3522347Spst * to or modifications of the Original Intel Code. No other license or right 3622347Spst * is granted directly or by implication, estoppel or otherwise; 3722347Spst * 3822347Spst * The above copyright and patent license is granted only if the following 3922347Spst * conditions are met: 4022347Spst * 4122347Spst * 3. Conditions 4222347Spst * 4322347Spst * 3.1. Redistribution of Source with Rights to Further Distribute Source. 4422347Spst * Redistribution of source code of any substantial portion of the Covered 4522347Spst * Code or modification with rights to further distribute source must include 4622347Spst * the above Copyright Notice, the above License, this list of Conditions, 4722347Spst * and the following Disclaimer and Export Compliance provision. In addition, 4822347Spst * Licensee must cause all Covered Code to which Licensee contributes to 4922347Spst * contain a file documenting the changes Licensee made to create that Covered 5022347Spst * Code and the date of any change. Licensee must include in that file the 5122347Spst * documentation of any changes made by any predecessor Licensee. Licensee 5222347Spst * must include a prominent statement that the modification is derived, 5322347Spst * directly or indirectly, from Original Intel Code. 5422347Spst * 5522347Spst * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 5622347Spst * Redistribution of source code of any substantial portion of the Covered 5722347Spst * Code or modification without rights to further distribute source must 5822347Spst * include the following Disclaimer and Export Compliance provision in the 5922347Spst * documentation and/or other materials provided with distribution. In 6022347Spst * addition, Licensee may not authorize further sublicense of source of any 6122347Spst * portion of the Covered Code, and must include terms to the effect that the 6222347Spst * license from Licensee to its licensee is limited to the intellectual 6322347Spst * property embodied in the software Licensee provides to its licensee, and 6422347Spst * not to intellectual property embodied in modifications its licensee may 6522347Spst * make. 6622347Spst * 6722347Spst * 3.3. Redistribution of Executable. Redistribution in executable form of any 6822347Spst * substantial portion of the Covered Code or modification must reproduce the 6922347Spst * above Copyright Notice, and the following Disclaimer and Export Compliance 7022347Spst * provision in the documentation and/or other materials provided with the 7122347Spst * distribution. 7222347Spst * 7322347Spst * 3.4. Intel retains all right, title, and interest in and to the Original 7422347Spst * Intel Code. 7522347Spst * 7622347Spst * 3.5. Neither the name Intel nor any other trademark owned or controlled by 7722347Spst * Intel shall be used in advertising or otherwise to promote the sale, use or 7822347Spst * other dealings in products derived from or relating to the Covered Code 7922347Spst * without prior written authorization from Intel. 8022347Spst * 8122347Spst * 4. Disclaimer and Export Compliance 8222347Spst * 8322347Spst * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 8422347Spst * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 8522347Spst * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 8622347Spst * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 8722347Spst * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 8822347Spst * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 8922347Spst * PARTICULAR PURPOSE. 9022347Spst * 9122347Spst * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 9222347Spst * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 9322347Spst * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 9422347Spst * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 9522347Spst * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 9622347Spst * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 9722347Spst * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 9822347Spst * LIMITED REMEDY. 9922347Spst * 10022347Spst * 4.3. Licensee shall not export, either directly or indirectly, any of this 10122347Spst * software or system incorporating such software without first obtaining any 10222347Spst * required license or other approval from the U. S. Department of Commerce or 10322347Spst * any other agency or department of the United States Government. In the 10422347Spst * event Licensee exports any such software from the United States or 10522347Spst * re-exports any such software from a foreign destination, Licensee shall 10622347Spst * ensure that the distribution and export/re-export of the software is in 10722347Spst * compliance with all laws, regulations, orders, or other restrictions of the 10822347Spst * U.S. Export Administration Regulations. Licensee agrees that neither it nor 10922347Spst * any of its subsidiaries will export/re-export any technical data, process, 11022347Spst * software, or service, directly or indirectly, to any country for which the 11122347Spst * United States government or any agency thereof requires an export license, 11222347Spst * other governmental approval, or letter of assurance, without first obtaining 11322347Spst * such license, approval or letter. 11422347Spst * 11522347Spst *****************************************************************************/ 11622347Spst 11722347Spst#define __DSMTHDAT_C__ 11822347Spst 11922347Spst#include <contrib/dev/acpica/acpi.h> 12022347Spst#include <contrib/dev/acpica/acdispat.h> 12122347Spst#include <contrib/dev/acpica/amlcode.h> 12222347Spst#include <contrib/dev/acpica/acnamesp.h> 12322347Spst#include <contrib/dev/acpica/acinterp.h> 12422347Spst 12522347Spst 12622347Spst#define _COMPONENT ACPI_DISPATCHER 12722347Spst ACPI_MODULE_NAME ("dsmthdat") 12822347Spst 12922347Spst/* Local prototypes */ 13022347Spst 13122347Spststatic void 13222347SpstAcpiDsMethodDataDeleteValue ( 13322347Spst UINT16 Opcode, 13422347Spst UINT32 Index, 13522347Spst ACPI_WALK_STATE *WalkState); 13622347Spst 13722347Spststatic ACPI_STATUS 13822347SpstAcpiDsMethodDataSetValue ( 13922347Spst UINT16 Opcode, 14022347Spst UINT32 Index, 14122347Spst ACPI_OPERAND_OBJECT *Object, 14222347Spst ACPI_WALK_STATE *WalkState); 14322347Spst 14422347Spst#ifdef ACPI_OBSOLETE_FUNCTIONS 14522347SpstACPI_OBJECT_TYPE 14622347SpstAcpiDsMethodDataGetType ( 14722347Spst UINT16 Opcode, 14822347Spst UINT32 Index, 14922347Spst ACPI_WALK_STATE *WalkState); 15022347Spst#endif 15122347Spst 15222347Spst 15322347Spst/******************************************************************************* 15422347Spst * 15522347Spst * FUNCTION: AcpiDsMethodDataInit 15622347Spst * 15722347Spst * PARAMETERS: WalkState - Current walk state object 15822347Spst * 15922347Spst * RETURN: Status 16022347Spst * 16122347Spst * DESCRIPTION: Initialize the data structures that hold the method's arguments 16222347Spst * and locals. The data struct is an array of namespace nodes for 16322347Spst * each - this allows RefOf and DeRefOf to work properly for these 16422347Spst * special data types. 16522347Spst * 16622347Spst * NOTES: WalkState fields are initialized to zero by the 16722347Spst * ACPI_ALLOCATE_ZEROED(). 16822347Spst * 16922347Spst * A pseudo-Namespace Node is assigned to each argument and local 17022347Spst * so that RefOf() can return a pointer to the Node. 17122347Spst * 17222347Spst ******************************************************************************/ 17322347Spst 17422347Spstvoid 17522347SpstAcpiDsMethodDataInit ( 17622347Spst ACPI_WALK_STATE *WalkState) 17722347Spst{ 17822347Spst UINT32 i; 17922347Spst 18022347Spst 18122347Spst ACPI_FUNCTION_TRACE (DsMethodDataInit); 18222347Spst 18322347Spst 18422347Spst /* Init the method arguments */ 18522347Spst 18622347Spst for (i = 0; i < ACPI_METHOD_NUM_ARGS; i++) 18722347Spst { 18822347Spst ACPI_MOVE_32_TO_32 (&WalkState->Arguments[i].Name, NAMEOF_ARG_NTE); 18922347Spst WalkState->Arguments[i].Name.Integer |= (i << 24); 19022347Spst WalkState->Arguments[i].DescriptorType = ACPI_DESC_TYPE_NAMED; 19122347Spst WalkState->Arguments[i].Type = ACPI_TYPE_ANY; 19222347Spst WalkState->Arguments[i].Flags = 19322347Spst ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_ARG; 19422347Spst } 19522347Spst 19622347Spst /* Init the method locals */ 19722347Spst 19822347Spst for (i = 0; i < ACPI_METHOD_NUM_LOCALS; i++) 19922347Spst { 20022347Spst ACPI_MOVE_32_TO_32 (&WalkState->LocalVariables[i].Name, NAMEOF_LOCAL_NTE); 20122347Spst 20222347Spst WalkState->LocalVariables[i].Name.Integer |= (i << 24); 20322347Spst WalkState->LocalVariables[i].DescriptorType = ACPI_DESC_TYPE_NAMED; 20422347Spst WalkState->LocalVariables[i].Type = ACPI_TYPE_ANY; 20522347Spst WalkState->LocalVariables[i].Flags = 20622347Spst ANOBJ_END_OF_PEER_LIST | ANOBJ_METHOD_LOCAL; 20722347Spst } 20822347Spst 20922347Spst return_VOID; 21022347Spst} 21122347Spst 21222347Spst 21322347Spst/******************************************************************************* 21422347Spst * 21522347Spst * FUNCTION: AcpiDsMethodDataDeleteAll 21622347Spst * 21722347Spst * PARAMETERS: WalkState - Current walk state object 21822347Spst * 21922347Spst * RETURN: None 22022347Spst * 22122347Spst * DESCRIPTION: Delete method locals and arguments. Arguments are only 22222347Spst * deleted if this method was called from another method. 22322347Spst * 22422347Spst ******************************************************************************/ 22522347Spst 22622347Spstvoid 22722347SpstAcpiDsMethodDataDeleteAll ( 22822347Spst ACPI_WALK_STATE *WalkState) 22922347Spst{ 23022347Spst UINT32 Index; 23122347Spst 23222347Spst 23322347Spst ACPI_FUNCTION_TRACE (DsMethodDataDeleteAll); 23422347Spst 23522347Spst 23622347Spst /* Detach the locals */ 23722347Spst 23822347Spst for (Index = 0; Index < ACPI_METHOD_NUM_LOCALS; Index++) 23922347Spst { 24022347Spst if (WalkState->LocalVariables[Index].Object) 24122347Spst { 24222347Spst ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Local%d=%p\n", 24322347Spst Index, WalkState->LocalVariables[Index].Object)); 24422347Spst 24522347Spst /* Detach object (if present) and remove a reference */ 24622347Spst 24722347Spst AcpiNsDetachObject (&WalkState->LocalVariables[Index]); 24822347Spst } 24922347Spst } 25022347Spst 25122347Spst /* Detach the arguments */ 25222347Spst 25322347Spst for (Index = 0; Index < ACPI_METHOD_NUM_ARGS; Index++) 25422347Spst { 25522347Spst if (WalkState->Arguments[Index].Object) 25622347Spst { 25722347Spst ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Deleting Arg%d=%p\n", 25822347Spst Index, WalkState->Arguments[Index].Object)); 25922347Spst 26022347Spst /* Detach object (if present) and remove a reference */ 26122347Spst 26222347Spst AcpiNsDetachObject (&WalkState->Arguments[Index]); 26322347Spst } 26422347Spst } 26522347Spst 26622347Spst return_VOID; 26722347Spst} 26822347Spst 26922347Spst 27022347Spst/******************************************************************************* 27122347Spst * 27222347Spst * FUNCTION: AcpiDsMethodDataInitArgs 27322347Spst * 27422347Spst * PARAMETERS: *Params - Pointer to a parameter list for the method 27522347Spst * MaxParamCount - The arg count for this method 27622347Spst * WalkState - Current walk state object 27722347Spst * 27822347Spst * RETURN: Status 27922347Spst * 28022347Spst * DESCRIPTION: Initialize arguments for a method. The parameter list is a list 28122347Spst * of ACPI operand objects, either null terminated or whose length 28222347Spst * is defined by MaxParamCount. 28322347Spst * 28422347Spst ******************************************************************************/ 28522347Spst 28622347SpstACPI_STATUS 28722347SpstAcpiDsMethodDataInitArgs ( 28822347Spst ACPI_OPERAND_OBJECT **Params, 28922347Spst UINT32 MaxParamCount, 29022347Spst ACPI_WALK_STATE *WalkState) 29122347Spst{ 29222347Spst ACPI_STATUS Status; 29322347Spst UINT32 Index = 0; 29422347Spst 29522347Spst 29622347Spst ACPI_FUNCTION_TRACE_PTR (DsMethodDataInitArgs, Params); 29722347Spst 29822347Spst 29922347Spst if (!Params) 30022347Spst { 30122347Spst ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "No param list passed to method\n")); 30222347Spst return_ACPI_STATUS (AE_OK); 30322347Spst } 30422347Spst 305 /* Copy passed parameters into the new method stack frame */ 306 307 while ((Index < ACPI_METHOD_NUM_ARGS) && 308 (Index < MaxParamCount) && 309 Params[Index]) 310 { 311 /* 312 * A valid parameter. 313 * Store the argument in the method/walk descriptor. 314 * Do not copy the arg in order to implement call by reference 315 */ 316 Status = AcpiDsMethodDataSetValue (AML_ARG_OP, Index, 317 Params[Index], WalkState); 318 if (ACPI_FAILURE (Status)) 319 { 320 return_ACPI_STATUS (Status); 321 } 322 323 Index++; 324 } 325 326 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "%d args passed to method\n", Index)); 327 return_ACPI_STATUS (AE_OK); 328} 329 330 331/******************************************************************************* 332 * 333 * FUNCTION: AcpiDsMethodDataGetNode 334 * 335 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 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 UINT16 Opcode, 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 (Opcode) 360 { 361 case AML_LOCAL_OP: 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 AML_ARG_OP: 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, "Opcode %d is invalid", Opcode)); 393 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 394 } 395 396 return_ACPI_STATUS (AE_OK); 397} 398 399 400/******************************************************************************* 401 * 402 * FUNCTION: AcpiDsMethodDataSetValue 403 * 404 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 405 * Index - Which Local or Arg to get 406 * Object - Object to be inserted into the stack entry 407 * WalkState - Current walk state object 408 * 409 * RETURN: Status 410 * 411 * DESCRIPTION: Insert an object onto the method stack at entry Opcode:Index. 412 * Note: There is no "implicit conversion" for locals. 413 * 414 ******************************************************************************/ 415 416static ACPI_STATUS 417AcpiDsMethodDataSetValue ( 418 UINT16 Opcode, 419 UINT32 Index, 420 ACPI_OPERAND_OBJECT *Object, 421 ACPI_WALK_STATE *WalkState) 422{ 423 ACPI_STATUS Status; 424 ACPI_NAMESPACE_NODE *Node; 425 426 427 ACPI_FUNCTION_TRACE (DsMethodDataSetValue); 428 429 430 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 431 "NewObj %p Opcode %X, Refs=%d [%s]\n", Object, 432 Opcode, Object->Common.ReferenceCount, 433 AcpiUtGetTypeName (Object->Common.Type))); 434 435 /* Get the namespace node for the arg/local */ 436 437 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 438 if (ACPI_FAILURE (Status)) 439 { 440 return_ACPI_STATUS (Status); 441 } 442 443 /* 444 * Increment ref count so object can't be deleted while installed. 445 * NOTE: We do not copy the object in order to preserve the call by 446 * reference semantics of ACPI Control Method invocation. 447 * (See ACPI Specification 2.0C) 448 */ 449 AcpiUtAddReference (Object); 450 451 /* Install the object */ 452 453 Node->Object = Object; 454 return_ACPI_STATUS (Status); 455} 456 457 458/******************************************************************************* 459 * 460 * FUNCTION: AcpiDsMethodDataGetValue 461 * 462 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 463 * Index - Which localVar or argument to get 464 * WalkState - Current walk state object 465 * DestDesc - Where Arg or Local value is returned 466 * 467 * RETURN: Status 468 * 469 * DESCRIPTION: Retrieve value of selected Arg or Local for this method 470 * Used only in AcpiExResolveToValue(). 471 * 472 ******************************************************************************/ 473 474ACPI_STATUS 475AcpiDsMethodDataGetValue ( 476 UINT16 Opcode, 477 UINT32 Index, 478 ACPI_WALK_STATE *WalkState, 479 ACPI_OPERAND_OBJECT **DestDesc) 480{ 481 ACPI_STATUS Status; 482 ACPI_NAMESPACE_NODE *Node; 483 ACPI_OPERAND_OBJECT *Object; 484 485 486 ACPI_FUNCTION_TRACE (DsMethodDataGetValue); 487 488 489 /* Validate the object descriptor */ 490 491 if (!DestDesc) 492 { 493 ACPI_ERROR ((AE_INFO, "Null object descriptor pointer")); 494 return_ACPI_STATUS (AE_BAD_PARAMETER); 495 } 496 497 /* Get the namespace node for the arg/local */ 498 499 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 500 if (ACPI_FAILURE (Status)) 501 { 502 return_ACPI_STATUS (Status); 503 } 504 505 /* Get the object from the node */ 506 507 Object = Node->Object; 508 509 /* Examine the returned object, it must be valid. */ 510 511 if (!Object) 512 { 513 /* 514 * Index points to uninitialized object. 515 * This means that either 1) The expected argument was 516 * not passed to the method, or 2) A local variable 517 * was referenced by the method (via the ASL) 518 * before it was initialized. Either case is an error. 519 */ 520 521 /* If slack enabled, init the LocalX/ArgX to an Integer of value zero */ 522 523 if (AcpiGbl_EnableInterpreterSlack) 524 { 525 Object = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER); 526 if (!Object) 527 { 528 return_ACPI_STATUS (AE_NO_MEMORY); 529 } 530 531 Object->Integer.Value = 0; 532 Node->Object = Object; 533 } 534 535 /* Otherwise, return the error */ 536 537 else switch (Opcode) 538 { 539 case AML_ARG_OP: 540 541 ACPI_ERROR ((AE_INFO, 542 "Uninitialized Arg[%d] at node %p", 543 Index, Node)); 544 545 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG); 546 547 case AML_LOCAL_OP: 548 549 ACPI_ERROR ((AE_INFO, 550 "Uninitialized Local[%d] at node %p", 551 Index, Node)); 552 553 return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL); 554 555 default: 556 ACPI_ERROR ((AE_INFO, "Not a Arg/Local opcode: %X", Opcode)); 557 return_ACPI_STATUS (AE_AML_INTERNAL); 558 } 559 } 560 561 /* 562 * The Index points to an initialized and valid object. 563 * Return an additional reference to the object 564 */ 565 *DestDesc = Object; 566 AcpiUtAddReference (Object); 567 568 return_ACPI_STATUS (AE_OK); 569} 570 571 572/******************************************************************************* 573 * 574 * FUNCTION: AcpiDsMethodDataDeleteValue 575 * 576 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 577 * Index - Which localVar or argument to delete 578 * WalkState - Current walk state object 579 * 580 * RETURN: None 581 * 582 * DESCRIPTION: Delete the entry at Opcode:Index. Inserts 583 * a null into the stack slot after the object is deleted. 584 * 585 ******************************************************************************/ 586 587static void 588AcpiDsMethodDataDeleteValue ( 589 UINT16 Opcode, 590 UINT32 Index, 591 ACPI_WALK_STATE *WalkState) 592{ 593 ACPI_STATUS Status; 594 ACPI_NAMESPACE_NODE *Node; 595 ACPI_OPERAND_OBJECT *Object; 596 597 598 ACPI_FUNCTION_TRACE (DsMethodDataDeleteValue); 599 600 601 /* Get the namespace node for the arg/local */ 602 603 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 604 if (ACPI_FAILURE (Status)) 605 { 606 return_VOID; 607 } 608 609 /* Get the associated object */ 610 611 Object = AcpiNsGetAttachedObject (Node); 612 613 /* 614 * Undefine the Arg or Local by setting its descriptor 615 * pointer to NULL. Locals/Args can contain both 616 * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs 617 */ 618 Node->Object = NULL; 619 620 if ((Object) && 621 (ACPI_GET_DESCRIPTOR_TYPE (Object) == ACPI_DESC_TYPE_OPERAND)) 622 { 623 /* 624 * There is a valid object. 625 * Decrement the reference count by one to balance the 626 * increment when the object was stored. 627 */ 628 AcpiUtRemoveReference (Object); 629 } 630 631 return_VOID; 632} 633 634 635/******************************************************************************* 636 * 637 * FUNCTION: AcpiDsStoreObjectToLocal 638 * 639 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 640 * Index - Which Local or Arg to set 641 * ObjDesc - Value to be stored 642 * WalkState - Current walk state 643 * 644 * RETURN: Status 645 * 646 * DESCRIPTION: Store a value in an Arg or Local. The ObjDesc is installed 647 * as the new value for the Arg or Local and the reference count 648 * for ObjDesc is incremented. 649 * 650 ******************************************************************************/ 651 652ACPI_STATUS 653AcpiDsStoreObjectToLocal ( 654 UINT16 Opcode, 655 UINT32 Index, 656 ACPI_OPERAND_OBJECT *ObjDesc, 657 ACPI_WALK_STATE *WalkState) 658{ 659 ACPI_STATUS Status; 660 ACPI_NAMESPACE_NODE *Node; 661 ACPI_OPERAND_OBJECT *CurrentObjDesc; 662 ACPI_OPERAND_OBJECT *NewObjDesc; 663 664 665 ACPI_FUNCTION_TRACE (DsStoreObjectToLocal); 666 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Opcode=%X Index=%d Obj=%p\n", 667 Opcode, Index, ObjDesc)); 668 669 /* Parameter validation */ 670 671 if (!ObjDesc) 672 { 673 return_ACPI_STATUS (AE_BAD_PARAMETER); 674 } 675 676 /* Get the namespace node for the arg/local */ 677 678 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 679 if (ACPI_FAILURE (Status)) 680 { 681 return_ACPI_STATUS (Status); 682 } 683 684 CurrentObjDesc = AcpiNsGetAttachedObject (Node); 685 if (CurrentObjDesc == ObjDesc) 686 { 687 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Obj=%p already installed!\n", 688 ObjDesc)); 689 return_ACPI_STATUS (Status); 690 } 691 692 /* 693 * If the reference count on the object is more than one, we must 694 * take a copy of the object before we store. A reference count 695 * of exactly 1 means that the object was just created during the 696 * evaluation of an expression, and we can safely use it since it 697 * is not used anywhere else. 698 */ 699 NewObjDesc = ObjDesc; 700 if (ObjDesc->Common.ReferenceCount > 1) 701 { 702 Status = AcpiUtCopyIobjectToIobject (ObjDesc, &NewObjDesc, WalkState); 703 if (ACPI_FAILURE (Status)) 704 { 705 return_ACPI_STATUS (Status); 706 } 707 } 708 709 /* 710 * If there is an object already in this slot, we either 711 * have to delete it, or if this is an argument and there 712 * is an object reference stored there, we have to do 713 * an indirect store! 714 */ 715 if (CurrentObjDesc) 716 { 717 /* 718 * Check for an indirect store if an argument 719 * contains an object reference (stored as an Node). 720 * We don't allow this automatic dereferencing for 721 * locals, since a store to a local should overwrite 722 * anything there, including an object reference. 723 * 724 * If both Arg0 and Local0 contain RefOf (Local4): 725 * 726 * Store (1, Arg0) - Causes indirect store to local4 727 * Store (1, Local0) - Stores 1 in local0, overwriting 728 * the reference to local4 729 * Store (1, DeRefof (Local0)) - Causes indirect store to local4 730 * 731 * Weird, but true. 732 */ 733 if (Opcode == AML_ARG_OP) 734 { 735 /* 736 * If we have a valid reference object that came from RefOf(), 737 * do the indirect store 738 */ 739 if ((ACPI_GET_DESCRIPTOR_TYPE (CurrentObjDesc) == ACPI_DESC_TYPE_OPERAND) && 740 (CurrentObjDesc->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) && 741 (CurrentObjDesc->Reference.Opcode == AML_REF_OF_OP)) 742 { 743 ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, 744 "Arg (%p) is an ObjRef(Node), storing in node %p\n", 745 NewObjDesc, CurrentObjDesc)); 746 747 /* 748 * Store this object to the Node (perform the indirect store) 749 * NOTE: No implicit conversion is performed, as per the ACPI 750 * specification rules on storing to Locals/Args. 751 */ 752 Status = AcpiExStoreObjectToNode (NewObjDesc, 753 CurrentObjDesc->Reference.Object, WalkState, 754 ACPI_NO_IMPLICIT_CONVERSION); 755 756 /* Remove local reference if we copied the object above */ 757 758 if (NewObjDesc != ObjDesc) 759 { 760 AcpiUtRemoveReference (NewObjDesc); 761 } 762 return_ACPI_STATUS (Status); 763 } 764 } 765 766 /* 767 * Delete the existing object 768 * before storing the new one 769 */ 770 AcpiDsMethodDataDeleteValue (Opcode, Index, WalkState); 771 } 772 773 /* 774 * Install the Obj descriptor (*NewObjDesc) into 775 * the descriptor for the Arg or Local. 776 * (increments the object reference count by one) 777 */ 778 Status = AcpiDsMethodDataSetValue (Opcode, Index, NewObjDesc, WalkState); 779 780 /* Remove local reference if we copied the object above */ 781 782 if (NewObjDesc != ObjDesc) 783 { 784 AcpiUtRemoveReference (NewObjDesc); 785 } 786 787 return_ACPI_STATUS (Status); 788} 789 790 791#ifdef ACPI_OBSOLETE_FUNCTIONS 792/******************************************************************************* 793 * 794 * FUNCTION: AcpiDsMethodDataGetType 795 * 796 * PARAMETERS: Opcode - Either AML_LOCAL_OP or AML_ARG_OP 797 * Index - Which Local or Arg whose type to get 798 * WalkState - Current walk state object 799 * 800 * RETURN: Data type of current value of the selected Arg or Local 801 * 802 * DESCRIPTION: Get the type of the object stored in the Local or Arg 803 * 804 ******************************************************************************/ 805 806ACPI_OBJECT_TYPE 807AcpiDsMethodDataGetType ( 808 UINT16 Opcode, 809 UINT32 Index, 810 ACPI_WALK_STATE *WalkState) 811{ 812 ACPI_STATUS Status; 813 ACPI_NAMESPACE_NODE *Node; 814 ACPI_OPERAND_OBJECT *Object; 815 816 817 ACPI_FUNCTION_TRACE (DsMethodDataGetType); 818 819 820 /* Get the namespace node for the arg/local */ 821 822 Status = AcpiDsMethodDataGetNode (Opcode, Index, WalkState, &Node); 823 if (ACPI_FAILURE (Status)) 824 { 825 return_VALUE ((ACPI_TYPE_NOT_FOUND)); 826 } 827 828 /* Get the object */ 829 830 Object = AcpiNsGetAttachedObject (Node); 831 if (!Object) 832 { 833 /* Uninitialized local/arg, return TYPE_ANY */ 834 835 return_VALUE (ACPI_TYPE_ANY); 836 } 837 838 /* Get the object type */ 839 840 return_VALUE (ACPI_GET_OBJECT_TYPE (Object)); 841} 842#endif 843 844 845