dsmthdat.c revision 67754
1/******************************************************************************* 2 * 3 * Module Name: dsmthdat - control method arguments and local variables 4 * $Revision: 34 $ 5 * 6 ******************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights 13 * 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 __DSMTHDAT_C__ 118 119#include "acpi.h" 120#include "acparser.h" 121#include "acdispat.h" 122#include "acinterp.h" 123#include "amlcode.h" 124#include "acnamesp.h" 125 126 127#define _COMPONENT DISPATCHER 128 MODULE_NAME ("dsmthdat") 129 130 131/******************************************************************************* 132 * 133 * FUNCTION: AcpiDsMethodDataInit 134 * 135 * PARAMETERS: *ObjDesc 136 * 137 * RETURN: Status 138 * 139 * DESCRIPTION: Initialize the data structures that hold the method's arguments 140 * and locals. The data struct is an array of NTEs for each. 141 * This allows RefOf and DeRefOf to work properly for these 142 * special data types. 143 * 144 ******************************************************************************/ 145 146ACPI_STATUS 147AcpiDsMethodDataInit ( 148 ACPI_WALK_STATE *WalkState) 149{ 150 UINT32 i; 151 152 153 FUNCTION_TRACE ("DsMethodDataInit"); 154 155 /* 156 * WalkState fields are initialized to zero by the 157 * AcpiCmCallocate(). 158 * 159 * An Node is assigned to each argument and local so 160 * that RefOf() can return a pointer to the Node. 161 */ 162 163 /* Init the method arguments */ 164 165 for (i = 0; i < MTH_NUM_ARGS; i++) 166 { 167 MOVE_UNALIGNED32_TO_32 (&WalkState->Arguments[i].Name, 168 NAMEOF_ARG_NTE); 169 170 WalkState->Arguments[i].Name |= (i << 24); 171 WalkState->Arguments[i].DataType = ACPI_DESC_TYPE_NAMED; 172 WalkState->Arguments[i].Type = INTERNAL_TYPE_METHOD_ARGUMENT; 173 } 174 175 /* Init the method locals */ 176 177 for (i = 0; i < MTH_NUM_LOCALS; i++) 178 { 179 MOVE_UNALIGNED32_TO_32 (&WalkState->LocalVariables[i].Name, 180 NAMEOF_LOCAL_NTE); 181 182 WalkState->LocalVariables[i].Name |= (i << 24); 183 WalkState->LocalVariables[i].DataType = ACPI_DESC_TYPE_NAMED; 184 WalkState->LocalVariables[i].Type = INTERNAL_TYPE_METHOD_LOCAL_VAR; 185 } 186 187 return_ACPI_STATUS (AE_OK); 188} 189 190 191/******************************************************************************* 192 * 193 * FUNCTION: AcpiDsMethodDataDeleteAll 194 * 195 * PARAMETERS: None 196 * 197 * RETURN: Status 198 * 199 * DESCRIPTION: Delete method locals and arguments. Arguments are only 200 * deleted if this method was called from another method. 201 * 202 ******************************************************************************/ 203 204ACPI_STATUS 205AcpiDsMethodDataDeleteAll ( 206 ACPI_WALK_STATE *WalkState) 207{ 208 UINT32 Index; 209 ACPI_OPERAND_OBJECT *Object; 210 211 212 FUNCTION_TRACE ("DsMethodDataDeleteAll"); 213 214 215 /* Delete the locals */ 216 217 DEBUG_PRINT (ACPI_INFO, 218 ("MethodDeleteAll: Deleting local variables in %p\n", WalkState)); 219 220 for (Index = 0; Index < MTH_NUM_LOCALS; Index++) 221 { 222 Object = WalkState->LocalVariables[Index].Object; 223 if (Object) 224 { 225 DEBUG_PRINT (TRACE_EXEC, 226 ("MethodDeleteAll: Deleting Local%d=%p\n", Index, Object)); 227 228 /* Remove first */ 229 230 WalkState->LocalVariables[Index].Object = NULL; 231 232 /* Was given a ref when stored */ 233 234 AcpiCmRemoveReference (Object); 235 } 236 } 237 238 239 /* Delete the arguments */ 240 241 DEBUG_PRINT (ACPI_INFO, 242 ("MethodDeleteAll: Deleting arguments in %p\n", WalkState)); 243 244 for (Index = 0; Index < MTH_NUM_ARGS; Index++) 245 { 246 Object = WalkState->Arguments[Index].Object; 247 if (Object) 248 { 249 DEBUG_PRINT (TRACE_EXEC, 250 ("MethodDeleteAll: Deleting Arg%d=%p\n", Index, Object)); 251 252 /* Remove first */ 253 254 WalkState->Arguments[Index].Object = NULL; 255 256 /* Was given a ref when stored */ 257 258 AcpiCmRemoveReference (Object); 259 } 260 } 261 262 return_ACPI_STATUS (AE_OK); 263} 264 265 266/******************************************************************************* 267 * 268 * FUNCTION: AcpiDsMethodDataInitArgs 269 * 270 * PARAMETERS: None 271 * 272 * RETURN: Status 273 * 274 * DESCRIPTION: Initialize arguments for a method 275 * 276 ******************************************************************************/ 277 278ACPI_STATUS 279AcpiDsMethodDataInitArgs ( 280 ACPI_OPERAND_OBJECT **Params, 281 UINT32 MaxParamCount, 282 ACPI_WALK_STATE *WalkState) 283{ 284 ACPI_STATUS Status; 285 UINT32 Mindex; 286 UINT32 Pindex; 287 288 289 FUNCTION_TRACE_PTR ("DsMethodDataInitArgs", Params); 290 291 292 if (!Params) 293 { 294 DEBUG_PRINT (TRACE_EXEC, 295 ("DsMethodDataInitArgs: No param list passed to method\n")); 296 return_ACPI_STATUS (AE_OK); 297 } 298 299 /* Copy passed parameters into the new method stack frame */ 300 301 for (Pindex = Mindex = 0; 302 (Mindex < MTH_NUM_ARGS) && (Pindex < MaxParamCount); 303 Mindex++) 304 { 305 if (Params[Pindex]) 306 { 307 /* 308 * A valid parameter. 309 * Set the current method argument to the 310 * Params[Pindex++] argument object descriptor 311 */ 312 Status = AcpiDsMethodDataSetValue (MTH_TYPE_ARG, Mindex, 313 Params[Pindex], WalkState); 314 if (ACPI_FAILURE (Status)) 315 { 316 break; 317 } 318 319 Pindex++; 320 } 321 322 else 323 { 324 break; 325 } 326 } 327 328 DEBUG_PRINT (TRACE_EXEC, 329 ("DsMethodDataInitArgs: %d args passed to method\n", Pindex)); 330 return_ACPI_STATUS (AE_OK); 331} 332 333 334/******************************************************************************* 335 * 336 * FUNCTION: AcpiDsMethodDataGetEntry 337 * 338 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 339 * Index - Which localVar or argument to get 340 * Entry - Pointer to where a pointer to the stack 341 * entry is returned. 342 * 343 * RETURN: Status 344 * 345 * DESCRIPTION: Get the address of the stack entry given by Type:Index 346 * 347 ******************************************************************************/ 348 349ACPI_STATUS 350AcpiDsMethodDataGetEntry ( 351 UINT32 Type, 352 UINT32 Index, 353 ACPI_WALK_STATE *WalkState, 354 ACPI_OPERAND_OBJECT ***Entry) 355{ 356 357 FUNCTION_TRACE_U32 ("DsMethodDataGetEntry", Index); 358 359 360 /* 361 * Get the requested object. 362 * The stack "Type" is either a LocalVariable or an Argument 363 */ 364 365 switch (Type) 366 { 367 368 case MTH_TYPE_LOCAL: 369 370 if (Index > MTH_MAX_LOCAL) 371 { 372 DEBUG_PRINT (ACPI_ERROR, 373 ("DsMethodDataGetEntry: LocalVar index %d is invalid (max %d)\n", 374 Index, MTH_MAX_LOCAL)); 375 return_ACPI_STATUS (AE_BAD_PARAMETER); 376 } 377 378 *Entry = 379 (ACPI_OPERAND_OBJECT **) &WalkState->LocalVariables[Index].Object; 380 break; 381 382 383 case MTH_TYPE_ARG: 384 385 if (Index > MTH_MAX_ARG) 386 { 387 DEBUG_PRINT (ACPI_ERROR, 388 ("DsMethodDataGetEntry: Argument index %d is invalid (max %d)\n", 389 Index, MTH_MAX_ARG)); 390 return_ACPI_STATUS (AE_BAD_PARAMETER); 391 } 392 393 *Entry = 394 (ACPI_OPERAND_OBJECT **) &WalkState->Arguments[Index].Object; 395 break; 396 397 398 default: 399 DEBUG_PRINT (ACPI_ERROR, 400 ("DsMethodDataGetEntry: Stack type %d is invalid\n", 401 Type)); 402 return_ACPI_STATUS (AE_BAD_PARAMETER); 403 } 404 405 406 return_ACPI_STATUS (AE_OK); 407} 408 409 410/******************************************************************************* 411 * 412 * FUNCTION: AcpiDsMethodDataSetEntry 413 * 414 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 415 * Index - Which localVar or argument to get 416 * Object - Object to be inserted into the stack entry 417 * 418 * RETURN: Status 419 * 420 * DESCRIPTION: Insert an object onto the method stack at entry Type:Index. 421 * 422 ******************************************************************************/ 423 424ACPI_STATUS 425AcpiDsMethodDataSetEntry ( 426 UINT32 Type, 427 UINT32 Index, 428 ACPI_OPERAND_OBJECT *Object, 429 ACPI_WALK_STATE *WalkState) 430{ 431 ACPI_STATUS Status; 432 ACPI_OPERAND_OBJECT **Entry; 433 434 435 FUNCTION_TRACE ("DsMethodDataSetEntry"); 436 437 /* Get a pointer to the stack entry to set */ 438 439 Status = AcpiDsMethodDataGetEntry (Type, Index, WalkState, &Entry); 440 if (ACPI_FAILURE (Status)) 441 { 442 return_ACPI_STATUS (Status); 443 } 444 445 /* Increment ref count so object can't be deleted while installed */ 446 447 AcpiCmAddReference (Object); 448 449 /* Install the object into the stack entry */ 450 451 *Entry = Object; 452 453 return_ACPI_STATUS (AE_OK); 454} 455 456 457/******************************************************************************* 458 * 459 * FUNCTION: AcpiDsMethodDataGetType 460 * 461 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 462 * Index - Which localVar or argument whose type 463 * to get 464 * 465 * RETURN: Data type of selected Arg or Local 466 * Used only in ExecMonadic2()/TypeOp. 467 * 468 ******************************************************************************/ 469 470OBJECT_TYPE_INTERNAL 471AcpiDsMethodDataGetType ( 472 UINT32 Type, 473 UINT32 Index, 474 ACPI_WALK_STATE *WalkState) 475{ 476 ACPI_STATUS Status; 477 ACPI_OPERAND_OBJECT **Entry; 478 ACPI_OPERAND_OBJECT *Object; 479 480 481 FUNCTION_TRACE ("DsMethodDataGetType"); 482 483 484 /* Get a pointer to the requested stack entry */ 485 486 Status = AcpiDsMethodDataGetEntry (Type, Index, WalkState, &Entry); 487 if (ACPI_FAILURE (Status)) 488 { 489 return_VALUE ((ACPI_TYPE_NOT_FOUND)); 490 } 491 492 /* Get the object from the method stack */ 493 494 Object = *Entry; 495 496 /* Get the object type */ 497 498 if (!Object) 499 { 500 /* Any == 0 => "uninitialized" -- see spec 15.2.3.5.2.28 */ 501 return_VALUE (ACPI_TYPE_ANY); 502 } 503 504 return_VALUE (Object->Common.Type); 505} 506 507 508/******************************************************************************* 509 * 510 * FUNCTION: AcpiDsMethodDataGetNte 511 * 512 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 513 * Index - Which localVar or argument whose type 514 * to get 515 * 516 * RETURN: Get the Node associated with a local or arg. 517 * 518 ******************************************************************************/ 519 520ACPI_NAMESPACE_NODE * 521AcpiDsMethodDataGetNte ( 522 UINT32 Type, 523 UINT32 Index, 524 ACPI_WALK_STATE *WalkState) 525{ 526 ACPI_NAMESPACE_NODE *Node = NULL; 527 528 529 FUNCTION_TRACE ("DsMethodDataGetNte"); 530 531 532 switch (Type) 533 { 534 535 case MTH_TYPE_LOCAL: 536 537 if (Index > MTH_MAX_LOCAL) 538 { 539 DEBUG_PRINT (ACPI_ERROR, 540 ("DsMethodDataGetEntry: LocalVar index %d is invalid (max %d)\n", 541 Index, MTH_MAX_LOCAL)); 542 return_PTR (Node); 543 } 544 545 Node = &WalkState->LocalVariables[Index]; 546 break; 547 548 549 case MTH_TYPE_ARG: 550 551 if (Index > MTH_MAX_ARG) 552 { 553 DEBUG_PRINT (ACPI_ERROR, 554 ("DsMethodDataGetEntry: Argument index %d is invalid (max %d)\n", 555 Index, MTH_MAX_ARG)); 556 return_PTR (Node); 557 } 558 559 Node = &WalkState->Arguments[Index]; 560 break; 561 562 563 default: 564 DEBUG_PRINT (ACPI_ERROR, 565 ("DsMethodDataGetEntry: Stack type %d is invalid\n", 566 Type)); 567 break; 568 } 569 570 571 return_PTR (Node); 572} 573 574 575/******************************************************************************* 576 * 577 * FUNCTION: AcpiDsMethodDataGetValue 578 * 579 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 580 * Index - Which localVar or argument to get 581 * *DestDesc - Descriptor into which selected Arg 582 * or Local value should be copied 583 * 584 * RETURN: Status 585 * 586 * DESCRIPTION: Retrieve value of selected Arg or Local from the method frame 587 * at the current top of the method stack. 588 * Used only in AcpiAmlResolveToValue(). 589 * 590 ******************************************************************************/ 591 592ACPI_STATUS 593AcpiDsMethodDataGetValue ( 594 UINT32 Type, 595 UINT32 Index, 596 ACPI_WALK_STATE *WalkState, 597 ACPI_OPERAND_OBJECT **DestDesc) 598{ 599 ACPI_STATUS Status; 600 ACPI_OPERAND_OBJECT **Entry; 601 ACPI_OPERAND_OBJECT *Object; 602 603 604 FUNCTION_TRACE ("DsMethodDataGetValue"); 605 606 607 /* Validate the object descriptor */ 608 609 if (!DestDesc) 610 { 611 DEBUG_PRINT (ACPI_ERROR, 612 ("DsMethodDataGetValue: NULL object descriptor pointer\n")); 613 return_ACPI_STATUS (AE_BAD_PARAMETER); 614 } 615 616 617 /* Get a pointer to the requested method stack entry */ 618 619 Status = AcpiDsMethodDataGetEntry (Type, Index, WalkState, &Entry); 620 if (ACPI_FAILURE (Status)) 621 { 622 return_ACPI_STATUS (Status); 623 } 624 625 /* Get the object from the method stack */ 626 627 Object = *Entry; 628 629 630 /* Examine the returned object, it must be valid. */ 631 632 if (!Object) 633 { 634 /* 635 * Index points to uninitialized object stack value. 636 * This means that either 1) The expected argument was 637 * not passed to the method, or 2) A local variable 638 * was referenced by the method (via the ASL) 639 * before it was initialized. Either case is an error. 640 */ 641 642 switch (Type) 643 { 644 case MTH_TYPE_ARG: 645 DEBUG_PRINT (ACPI_ERROR, 646 ("DsMethodDataGetValue: Uninitialized Arg[%d] at entry %X\n", 647 Index, Entry)); 648 return_ACPI_STATUS (AE_AML_UNINITIALIZED_ARG); 649 break; 650 651 case MTH_TYPE_LOCAL: 652 DEBUG_PRINT (ACPI_ERROR, 653 ("DsMethodDataGetValue: Uninitialized Local[%d] at entry %X\n", 654 Index, Entry)); 655 return_ACPI_STATUS (AE_AML_UNINITIALIZED_LOCAL); 656 break; 657 } 658 } 659 660 661 /* 662 * Index points to initialized and valid object stack value. 663 * Return an additional reference to the object 664 */ 665 666 *DestDesc = Object; 667 AcpiCmAddReference (Object); 668 669 return_ACPI_STATUS (AE_OK); 670} 671 672 673/******************************************************************************* 674 * 675 * FUNCTION: AcpiDsMethodDataDeleteValue 676 * 677 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 678 * Index - Which localVar or argument to delete 679 * 680 * RETURN: Status 681 * 682 * DESCRIPTION: Delete the entry at Type:Index on the method stack. Inserts 683 * a null into the stack slot after the object is deleted. 684 * 685 ******************************************************************************/ 686 687ACPI_STATUS 688AcpiDsMethodDataDeleteValue ( 689 UINT32 Type, 690 UINT32 Index, 691 ACPI_WALK_STATE *WalkState) 692{ 693 ACPI_STATUS Status; 694 ACPI_OPERAND_OBJECT **Entry; 695 ACPI_OPERAND_OBJECT *Object; 696 697 698 FUNCTION_TRACE ("DsMethodDataDeleteValue"); 699 700 701 /* Get a pointer to the requested entry */ 702 703 Status = AcpiDsMethodDataGetEntry (Type, Index, WalkState, &Entry); 704 if (ACPI_FAILURE (Status)) 705 { 706 return_ACPI_STATUS (Status); 707 } 708 709 /* Get the current entry in this slot k */ 710 711 Object = *Entry; 712 713 /* 714 * Undefine the Arg or Local by setting its descriptor 715 * pointer to NULL. Locals/Args can contain both 716 * ACPI_OPERAND_OBJECTS and ACPI_NAMESPACE_NODEs 717 */ 718 *Entry = NULL; 719 720 721 if ((Object) && 722 (VALID_DESCRIPTOR_TYPE (Object, ACPI_DESC_TYPE_INTERNAL))) 723 { 724 /* 725 * There is a valid object in this slot 726 * Decrement the reference count by one to balance the 727 * increment when the object was stored in the slot. 728 */ 729 730 AcpiCmRemoveReference (Object); 731 } 732 733 734 return_ACPI_STATUS (AE_OK); 735} 736 737 738/******************************************************************************* 739 * 740 * FUNCTION: AcpiDsMethodDataSetValue 741 * 742 * PARAMETERS: Type - Either MTH_TYPE_LOCAL or MTH_TYPE_ARG 743 * Index - Which localVar or argument to set 744 * *SrcDesc - Value to be stored 745 * *DestDesc - Descriptor into which *SrcDesc 746 * can be copied, or NULL if one must 747 * be allocated for the purpose. If 748 * provided, this descriptor will be 749 * used for the new value. 750 * 751 * RETURN: Status 752 * 753 * DESCRIPTION: Store a value in an Arg or Local. The SrcDesc is installed 754 * as the new value for the Arg or Local and the reference count 755 * is incremented. 756 * 757 ******************************************************************************/ 758 759ACPI_STATUS 760AcpiDsMethodDataSetValue ( 761 UINT32 Type, 762 UINT32 Index, 763 ACPI_OPERAND_OBJECT *SrcDesc, 764 ACPI_WALK_STATE *WalkState) 765{ 766 ACPI_STATUS Status; 767 ACPI_OPERAND_OBJECT **Entry; 768 769 770 FUNCTION_TRACE ("DsMethodDataSetValue"); 771 DEBUG_PRINT (TRACE_EXEC, 772 ("DsMethodDataSetValue: Type=%d Idx=%d Obj=%p\n", 773 Type, Index, SrcDesc)); 774 775 776 /* Parameter validation */ 777 778 if (!SrcDesc) 779 { 780 return_ACPI_STATUS (AE_BAD_PARAMETER); 781 } 782 783 784 /* Get a pointer to the requested method stack entry */ 785 786 Status = AcpiDsMethodDataGetEntry (Type, Index, WalkState, &Entry); 787 if (ACPI_FAILURE (Status)) 788 { 789 goto Cleanup; 790 } 791 792 if (*Entry == SrcDesc) 793 { 794 DEBUG_PRINT (TRACE_EXEC, 795 ("DsMethodDataSetValue: Obj=%p already installed!\n", 796 SrcDesc)); 797 goto Cleanup; 798 } 799 800 801 /* 802 * If there is an object already in this slot, we either 803 * have to delete it, or if this is an argument and there 804 * is an object reference stored there, we have to do 805 * an indirect store! 806 */ 807 808 if (*Entry) 809 { 810 /* 811 * Check for an indirect store if an argument 812 * contains an object reference (stored as an Node). 813 * We don't allow this automatic dereferencing for 814 * locals, since a store to a local should overwrite 815 * anything there, including an object reference. 816 * 817 * If both Arg0 and Local0 contain RefOf (Local4): 818 * 819 * Store (1, Arg0) - Causes indirect store to local4 820 * Store (1, Local0) - Stores 1 in local0, overwriting 821 * the reference to local4 822 * Store (1, DeRefof (Local0)) - Causes indirect store to local4 823 * 824 * Weird, but true. 825 */ 826 827 if ((Type == MTH_TYPE_ARG) && 828 (VALID_DESCRIPTOR_TYPE (*Entry, ACPI_DESC_TYPE_NAMED))) 829 { 830 DEBUG_PRINT (TRACE_EXEC, 831 ("DsMethodDataSetValue: Arg (%p) is an ObjRef(Node), storing in %p\n", 832 SrcDesc, *Entry)); 833 834 /* Detach an existing object from the Node */ 835 836 AcpiNsDetachObject ((ACPI_NAMESPACE_NODE *) *Entry); 837 838 /* 839 * Store this object into the Node 840 * (do the indirect store) 841 */ 842 843 Status = AcpiNsAttachObject ((ACPI_NAMESPACE_NODE *) *Entry, SrcDesc, 844 SrcDesc->Common.Type); 845 return_ACPI_STATUS (Status); 846 } 847 848 849 /* 850 * Otherwise, just delete the existing object 851 * before storing the new one 852 */ 853 854 AcpiDsMethodDataDeleteValue (Type, Index, WalkState); 855 } 856 857 858 /* 859 * Install the ObjStack descriptor (*SrcDesc) into 860 * the descriptor for the Arg or Local. 861 * Install the new object in the stack entry 862 * (increments the object reference count by one) 863 */ 864 865 Status = AcpiDsMethodDataSetEntry (Type, Index, SrcDesc, WalkState); 866 if (ACPI_FAILURE (Status)) 867 { 868 goto Cleanup; 869 } 870 871 /* Normal exit */ 872 873 return_ACPI_STATUS (AE_OK); 874 875 876 /* Error exit */ 877 878Cleanup: 879 880 return_ACPI_STATUS (Status); 881} 882 883