dsfield.c revision 167802
1/****************************************************************************** 2 * 3 * Module Name: dsfield - Dispatcher field routines 4 * $Revision: 1.84 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999 - 2007, 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 __DSFIELD_C__ 118 119#include <contrib/dev/acpica/acpi.h> 120#include <contrib/dev/acpica/amlcode.h> 121#include <contrib/dev/acpica/acdispat.h> 122#include <contrib/dev/acpica/acinterp.h> 123#include <contrib/dev/acpica/acnamesp.h> 124#include <contrib/dev/acpica/acparser.h> 125 126 127#define _COMPONENT ACPI_DISPATCHER 128 ACPI_MODULE_NAME ("dsfield") 129 130/* Local prototypes */ 131 132static ACPI_STATUS 133AcpiDsGetFieldNames ( 134 ACPI_CREATE_FIELD_INFO *Info, 135 ACPI_WALK_STATE *WalkState, 136 ACPI_PARSE_OBJECT *Arg); 137 138 139/******************************************************************************* 140 * 141 * FUNCTION: AcpiDsCreateBufferField 142 * 143 * PARAMETERS: Op - Current parse op (CreateXXField) 144 * WalkState - Current state 145 * 146 * RETURN: Status 147 * 148 * DESCRIPTION: Execute the CreateField operators: 149 * CreateBitFieldOp, 150 * CreateByteFieldOp, 151 * CreateWordFieldOp, 152 * CreateDWordFieldOp, 153 * CreateQWordFieldOp, 154 * CreateFieldOp (all of which define a field in a buffer) 155 * 156 ******************************************************************************/ 157 158ACPI_STATUS 159AcpiDsCreateBufferField ( 160 ACPI_PARSE_OBJECT *Op, 161 ACPI_WALK_STATE *WalkState) 162{ 163 ACPI_PARSE_OBJECT *Arg; 164 ACPI_NAMESPACE_NODE *Node; 165 ACPI_STATUS Status; 166 ACPI_OPERAND_OBJECT *ObjDesc; 167 ACPI_OPERAND_OBJECT *SecondDesc = NULL; 168 UINT32 Flags; 169 170 171 ACPI_FUNCTION_TRACE (DsCreateBufferField); 172 173 174 /* Get the NameString argument */ 175 176 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 177 { 178 Arg = AcpiPsGetArg (Op, 3); 179 } 180 else 181 { 182 /* Create Bit/Byte/Word/Dword field */ 183 184 Arg = AcpiPsGetArg (Op, 2); 185 } 186 187 if (!Arg) 188 { 189 return_ACPI_STATUS (AE_AML_NO_OPERAND); 190 } 191 192 if (WalkState->DeferredNode) 193 { 194 Node = WalkState->DeferredNode; 195 Status = AE_OK; 196 } 197 else 198 { 199 /* 200 * During the load phase, we want to enter the name of the field into 201 * the namespace. During the execute phase (when we evaluate the size 202 * operand), we want to lookup the name 203 */ 204 if (WalkState->ParseFlags & ACPI_PARSE_EXECUTE) 205 { 206 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE; 207 } 208 else 209 { 210 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 211 ACPI_NS_ERROR_IF_FOUND; 212 } 213 214 /* 215 * Enter the NameString into the namespace 216 */ 217 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 218 ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1, 219 Flags, WalkState, &(Node)); 220 if (ACPI_FAILURE (Status)) 221 { 222 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 223 return_ACPI_STATUS (Status); 224 } 225 } 226 227 /* 228 * We could put the returned object (Node) on the object stack for later, 229 * but for now, we will put it in the "op" object that the parser uses, 230 * so we can get it again at the end of this scope 231 */ 232 Op->Common.Node = Node; 233 234 /* 235 * If there is no object attached to the node, this node was just created 236 * and we need to create the field object. Otherwise, this was a lookup 237 * of an existing node and we don't want to create the field object again. 238 */ 239 ObjDesc = AcpiNsGetAttachedObject (Node); 240 if (ObjDesc) 241 { 242 return_ACPI_STATUS (AE_OK); 243 } 244 245 /* 246 * The Field definition is not fully parsed at this time. 247 * (We must save the address of the AML for the buffer and index operands) 248 */ 249 250 /* Create the buffer field object */ 251 252 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 253 if (!ObjDesc) 254 { 255 Status = AE_NO_MEMORY; 256 goto Cleanup; 257 } 258 259 /* 260 * Remember location in AML stream of the field unit 261 * opcode and operands -- since the buffer and index 262 * operands must be evaluated. 263 */ 264 SecondDesc = ObjDesc->Common.NextObject; 265 SecondDesc->Extra.AmlStart = Op->Named.Data; 266 SecondDesc->Extra.AmlLength = Op->Named.Length; 267 ObjDesc->BufferField.Node = Node; 268 269 /* Attach constructed field descriptors to parent node */ 270 271 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 272 if (ACPI_FAILURE (Status)) 273 { 274 goto Cleanup; 275 } 276 277 278Cleanup: 279 280 /* Remove local reference to the object */ 281 282 AcpiUtRemoveReference (ObjDesc); 283 return_ACPI_STATUS (Status); 284} 285 286 287/******************************************************************************* 288 * 289 * FUNCTION: AcpiDsGetFieldNames 290 * 291 * PARAMETERS: Info - CreateField info structure 292 * ` WalkState - Current method state 293 * Arg - First parser arg for the field name list 294 * 295 * RETURN: Status 296 * 297 * DESCRIPTION: Process all named fields in a field declaration. Names are 298 * entered into the namespace. 299 * 300 ******************************************************************************/ 301 302static ACPI_STATUS 303AcpiDsGetFieldNames ( 304 ACPI_CREATE_FIELD_INFO *Info, 305 ACPI_WALK_STATE *WalkState, 306 ACPI_PARSE_OBJECT *Arg) 307{ 308 ACPI_STATUS Status; 309 ACPI_INTEGER Position; 310 311 312 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 313 314 315 /* First field starts at bit zero */ 316 317 Info->FieldBitPosition = 0; 318 319 /* Process all elements in the field list (of parse nodes) */ 320 321 while (Arg) 322 { 323 /* 324 * Three types of field elements are handled: 325 * 1) Offset - specifies a bit offset 326 * 2) AccessAs - changes the access mode 327 * 3) Name - Enters a new named field into the namespace 328 */ 329 switch (Arg->Common.AmlOpcode) 330 { 331 case AML_INT_RESERVEDFIELD_OP: 332 333 Position = (ACPI_INTEGER) Info->FieldBitPosition 334 + (ACPI_INTEGER) Arg->Common.Value.Size; 335 336 if (Position > ACPI_UINT32_MAX) 337 { 338 ACPI_ERROR ((AE_INFO, 339 "Bit offset within field too large (> 0xFFFFFFFF)")); 340 return_ACPI_STATUS (AE_SUPPORT); 341 } 342 343 Info->FieldBitPosition = (UINT32) Position; 344 break; 345 346 347 case AML_INT_ACCESSFIELD_OP: 348 349 /* 350 * Get a new AccessType and AccessAttribute -- to be used for all 351 * field units that follow, until field end or another AccessAs 352 * keyword. 353 * 354 * In FieldFlags, preserve the flag bits other than the 355 * ACCESS_TYPE bits 356 */ 357 Info->FieldFlags = (UINT8) 358 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 359 ((UINT8) ((UINT32) Arg->Common.Value.Integer >> 8))); 360 361 Info->Attribute = (UINT8) (Arg->Common.Value.Integer); 362 break; 363 364 365 case AML_INT_NAMEDFIELD_OP: 366 367 /* Lookup the name */ 368 369 Status = AcpiNsLookup (WalkState->ScopeInfo, 370 (char *) &Arg->Named.Name, 371 Info->FieldType, ACPI_IMODE_EXECUTE, 372 ACPI_NS_DONT_OPEN_SCOPE, 373 WalkState, &Info->FieldNode); 374 if (ACPI_FAILURE (Status)) 375 { 376 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 377 if (Status != AE_ALREADY_EXISTS) 378 { 379 return_ACPI_STATUS (Status); 380 } 381 382 /* Already exists, ignore error */ 383 } 384 else 385 { 386 Arg->Common.Node = Info->FieldNode; 387 Info->FieldBitLength = Arg->Common.Value.Size; 388 389 /* Create and initialize an object for the new Field Node */ 390 391 Status = AcpiExPrepFieldValue (Info); 392 if (ACPI_FAILURE (Status)) 393 { 394 return_ACPI_STATUS (Status); 395 } 396 } 397 398 /* Keep track of bit position for the next field */ 399 400 Position = (ACPI_INTEGER) Info->FieldBitPosition 401 + (ACPI_INTEGER) Arg->Common.Value.Size; 402 403 if (Position > ACPI_UINT32_MAX) 404 { 405 ACPI_ERROR ((AE_INFO, 406 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 407 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 408 return_ACPI_STATUS (AE_SUPPORT); 409 } 410 411 Info->FieldBitPosition += Info->FieldBitLength; 412 break; 413 414 415 default: 416 417 ACPI_ERROR ((AE_INFO, 418 "Invalid opcode in field list: %X", 419 Arg->Common.AmlOpcode)); 420 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 421 } 422 423 Arg = Arg->Common.Next; 424 } 425 426 return_ACPI_STATUS (AE_OK); 427} 428 429 430/******************************************************************************* 431 * 432 * FUNCTION: AcpiDsCreateField 433 * 434 * PARAMETERS: Op - Op containing the Field definition and args 435 * RegionNode - Object for the containing Operation Region 436 * ` WalkState - Current method state 437 * 438 * RETURN: Status 439 * 440 * DESCRIPTION: Create a new field in the specified operation region 441 * 442 ******************************************************************************/ 443 444ACPI_STATUS 445AcpiDsCreateField ( 446 ACPI_PARSE_OBJECT *Op, 447 ACPI_NAMESPACE_NODE *RegionNode, 448 ACPI_WALK_STATE *WalkState) 449{ 450 ACPI_STATUS Status; 451 ACPI_PARSE_OBJECT *Arg; 452 ACPI_CREATE_FIELD_INFO Info; 453 454 455 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 456 457 458 /* First arg is the name of the parent OpRegion (must already exist) */ 459 460 Arg = Op->Common.Value.Arg; 461 if (!RegionNode) 462 { 463 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 464 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 465 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 466 if (ACPI_FAILURE (Status)) 467 { 468 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 469 return_ACPI_STATUS (Status); 470 } 471 } 472 473 /* Second arg is the field flags */ 474 475 Arg = Arg->Common.Next; 476 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 477 Info.Attribute = 0; 478 479 /* Each remaining arg is a Named Field */ 480 481 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 482 Info.RegionNode = RegionNode; 483 484 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 485 486 return_ACPI_STATUS (Status); 487} 488 489 490/******************************************************************************* 491 * 492 * FUNCTION: AcpiDsInitFieldObjects 493 * 494 * PARAMETERS: Op - Op containing the Field definition and args 495 * ` WalkState - Current method state 496 * 497 * RETURN: Status 498 * 499 * DESCRIPTION: For each "Field Unit" name in the argument list that is 500 * part of the field declaration, enter the name into the 501 * namespace. 502 * 503 ******************************************************************************/ 504 505ACPI_STATUS 506AcpiDsInitFieldObjects ( 507 ACPI_PARSE_OBJECT *Op, 508 ACPI_WALK_STATE *WalkState) 509{ 510 ACPI_STATUS Status; 511 ACPI_PARSE_OBJECT *Arg = NULL; 512 ACPI_NAMESPACE_NODE *Node; 513 UINT8 Type = 0; 514 515 516 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 517 518 519 switch (WalkState->Opcode) 520 { 521 case AML_FIELD_OP: 522 Arg = AcpiPsGetArg (Op, 2); 523 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 524 break; 525 526 case AML_BANK_FIELD_OP: 527 Arg = AcpiPsGetArg (Op, 4); 528 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 529 break; 530 531 case AML_INDEX_FIELD_OP: 532 Arg = AcpiPsGetArg (Op, 3); 533 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 534 break; 535 536 default: 537 return_ACPI_STATUS (AE_BAD_PARAMETER); 538 } 539 540 /* 541 * Walk the list of entries in the FieldList 542 */ 543 while (Arg) 544 { 545 /* Ignore OFFSET and ACCESSAS terms here */ 546 547 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 548 { 549 Status = AcpiNsLookup (WalkState->ScopeInfo, 550 (char *) &Arg->Named.Name, 551 Type, ACPI_IMODE_LOAD_PASS1, 552 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 553 ACPI_NS_ERROR_IF_FOUND, 554 WalkState, &Node); 555 if (ACPI_FAILURE (Status)) 556 { 557 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 558 if (Status != AE_ALREADY_EXISTS) 559 { 560 return_ACPI_STATUS (Status); 561 } 562 563 /* Name already exists, just ignore this error */ 564 565 Status = AE_OK; 566 } 567 568 Arg->Common.Node = Node; 569 } 570 571 /* Move to next field in the list */ 572 573 Arg = Arg->Common.Next; 574 } 575 576 return_ACPI_STATUS (AE_OK); 577} 578 579 580/******************************************************************************* 581 * 582 * FUNCTION: AcpiDsCreateBankField 583 * 584 * PARAMETERS: Op - Op containing the Field definition and args 585 * RegionNode - Object for the containing Operation Region 586 * ` WalkState - Current method state 587 * 588 * RETURN: Status 589 * 590 * DESCRIPTION: Create a new bank field in the specified operation region 591 * 592 ******************************************************************************/ 593 594ACPI_STATUS 595AcpiDsCreateBankField ( 596 ACPI_PARSE_OBJECT *Op, 597 ACPI_NAMESPACE_NODE *RegionNode, 598 ACPI_WALK_STATE *WalkState) 599{ 600 ACPI_STATUS Status; 601 ACPI_PARSE_OBJECT *Arg; 602 ACPI_CREATE_FIELD_INFO Info; 603 604 605 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 606 607 608 /* First arg is the name of the parent OpRegion (must already exist) */ 609 610 Arg = Op->Common.Value.Arg; 611 if (!RegionNode) 612 { 613 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 614 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 615 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 616 if (ACPI_FAILURE (Status)) 617 { 618 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 619 return_ACPI_STATUS (Status); 620 } 621 } 622 623 /* Second arg is the Bank Register (Field) (must already exist) */ 624 625 Arg = Arg->Common.Next; 626 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 627 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 628 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 629 if (ACPI_FAILURE (Status)) 630 { 631 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 632 return_ACPI_STATUS (Status); 633 } 634 635 /* Third arg is the BankValue */ 636 637 /* TBD: This arg is a TermArg, not a constant, and must be evaluated */ 638 639 Arg = Arg->Common.Next; 640 641 /* Currently, only the following constants are supported */ 642 643 switch (Arg->Common.AmlOpcode) 644 { 645 case AML_ZERO_OP: 646 Info.BankValue = 0; 647 break; 648 649 case AML_ONE_OP: 650 Info.BankValue = 1; 651 break; 652 653 case AML_BYTE_OP: 654 case AML_WORD_OP: 655 case AML_DWORD_OP: 656 case AML_QWORD_OP: 657 Info.BankValue = (UINT32) Arg->Common.Value.Integer; 658 break; 659 660 default: 661 Info.BankValue = 0; 662 ACPI_ERROR ((AE_INFO, "Non-constant BankValue for BankField is not implemented")); 663 } 664 665 /* Fourth arg is the field flags */ 666 667 Arg = Arg->Common.Next; 668 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 669 670 /* Each remaining arg is a Named Field */ 671 672 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 673 Info.RegionNode = RegionNode; 674 675 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 676 677 return_ACPI_STATUS (Status); 678} 679 680 681/******************************************************************************* 682 * 683 * FUNCTION: AcpiDsCreateIndexField 684 * 685 * PARAMETERS: Op - Op containing the Field definition and args 686 * RegionNode - Object for the containing Operation Region 687 * ` WalkState - Current method state 688 * 689 * RETURN: Status 690 * 691 * DESCRIPTION: Create a new index field in the specified operation region 692 * 693 ******************************************************************************/ 694 695ACPI_STATUS 696AcpiDsCreateIndexField ( 697 ACPI_PARSE_OBJECT *Op, 698 ACPI_NAMESPACE_NODE *RegionNode, 699 ACPI_WALK_STATE *WalkState) 700{ 701 ACPI_STATUS Status; 702 ACPI_PARSE_OBJECT *Arg; 703 ACPI_CREATE_FIELD_INFO Info; 704 705 706 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 707 708 709 /* First arg is the name of the Index register (must already exist) */ 710 711 Arg = Op->Common.Value.Arg; 712 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 713 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 714 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 715 if (ACPI_FAILURE (Status)) 716 { 717 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 718 return_ACPI_STATUS (Status); 719 } 720 721 /* Second arg is the data register (must already exist) */ 722 723 Arg = Arg->Common.Next; 724 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 725 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 726 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 727 if (ACPI_FAILURE (Status)) 728 { 729 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 730 return_ACPI_STATUS (Status); 731 } 732 733 /* Next arg is the field flags */ 734 735 Arg = Arg->Common.Next; 736 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 737 738 /* Each remaining arg is a Named Field */ 739 740 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 741 Info.RegionNode = RegionNode; 742 743 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 744 745 return_ACPI_STATUS (Status); 746} 747 748 749