1/****************************************************************************** 2 * 3 * Module Name: dsfield - Dispatcher field routines 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2013, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44#define __DSFIELD_C__ 45 46#include <contrib/dev/acpica/include/acpi.h> 47#include <contrib/dev/acpica/include/accommon.h> 48#include <contrib/dev/acpica/include/amlcode.h> 49#include <contrib/dev/acpica/include/acdispat.h> 50#include <contrib/dev/acpica/include/acinterp.h> 51#include <contrib/dev/acpica/include/acnamesp.h> 52#include <contrib/dev/acpica/include/acparser.h> 53 54 55#define _COMPONENT ACPI_DISPATCHER 56 ACPI_MODULE_NAME ("dsfield") 57 58/* Local prototypes */ 59 60#ifdef ACPI_ASL_COMPILER 61#include <contrib/dev/acpica/include/acdisasm.h> 62 63static ACPI_STATUS 64AcpiDsCreateExternalRegion ( 65 ACPI_STATUS LookupStatus, 66 ACPI_PARSE_OBJECT *Op, 67 char *Path, 68 ACPI_WALK_STATE *WalkState, 69 ACPI_NAMESPACE_NODE **Node); 70#endif 71 72static ACPI_STATUS 73AcpiDsGetFieldNames ( 74 ACPI_CREATE_FIELD_INFO *Info, 75 ACPI_WALK_STATE *WalkState, 76 ACPI_PARSE_OBJECT *Arg); 77 78 79#ifdef ACPI_ASL_COMPILER 80/******************************************************************************* 81 * 82 * FUNCTION: AcpiDsCreateExternalRegion (iASL Disassembler only) 83 * 84 * PARAMETERS: LookupStatus - Status from NsLookup operation 85 * Op - Op containing the Field definition and args 86 * Path - Pathname of the region 87 * ` WalkState - Current method state 88 * Node - Where the new region node is returned 89 * 90 * RETURN: Status 91 * 92 * DESCRIPTION: Add region to the external list if NOT_FOUND. Create a new 93 * region node/object. 94 * 95 ******************************************************************************/ 96 97static ACPI_STATUS 98AcpiDsCreateExternalRegion ( 99 ACPI_STATUS LookupStatus, 100 ACPI_PARSE_OBJECT *Op, 101 char *Path, 102 ACPI_WALK_STATE *WalkState, 103 ACPI_NAMESPACE_NODE **Node) 104{ 105 ACPI_STATUS Status; 106 ACPI_OPERAND_OBJECT *ObjDesc; 107 108 109 if (LookupStatus != AE_NOT_FOUND) 110 { 111 return (LookupStatus); 112 } 113 114 /* 115 * Table disassembly: 116 * OperationRegion not found. Generate an External for it, and 117 * insert the name into the namespace. 118 */ 119 AcpiDmAddToExternalList (Op, Path, ACPI_TYPE_REGION, 0); 120 Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ACPI_TYPE_REGION, 121 ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT, WalkState, Node); 122 if (ACPI_FAILURE (Status)) 123 { 124 return (Status); 125 } 126 127 /* Must create and install a region object for the new node */ 128 129 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_REGION); 130 if (!ObjDesc) 131 { 132 return (AE_NO_MEMORY); 133 } 134 135 ObjDesc->Region.Node = *Node; 136 Status = AcpiNsAttachObject (*Node, ObjDesc, ACPI_TYPE_REGION); 137 return (Status); 138} 139#endif 140 141 142/******************************************************************************* 143 * 144 * FUNCTION: AcpiDsCreateBufferField 145 * 146 * PARAMETERS: Op - Current parse op (CreateXXField) 147 * WalkState - Current state 148 * 149 * RETURN: Status 150 * 151 * DESCRIPTION: Execute the CreateField operators: 152 * CreateBitFieldOp, 153 * CreateByteFieldOp, 154 * CreateWordFieldOp, 155 * CreateDwordFieldOp, 156 * CreateQwordFieldOp, 157 * CreateFieldOp (all of which define a field in a buffer) 158 * 159 ******************************************************************************/ 160 161ACPI_STATUS 162AcpiDsCreateBufferField ( 163 ACPI_PARSE_OBJECT *Op, 164 ACPI_WALK_STATE *WalkState) 165{ 166 ACPI_PARSE_OBJECT *Arg; 167 ACPI_NAMESPACE_NODE *Node; 168 ACPI_STATUS Status; 169 ACPI_OPERAND_OBJECT *ObjDesc; 170 ACPI_OPERAND_OBJECT *SecondDesc = NULL; 171 UINT32 Flags; 172 173 174 ACPI_FUNCTION_TRACE (DsCreateBufferField); 175 176 177 /* 178 * Get the NameString argument (name of the new BufferField) 179 */ 180 if (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP) 181 { 182 /* For CreateField, name is the 4th argument */ 183 184 Arg = AcpiPsGetArg (Op, 3); 185 } 186 else 187 { 188 /* For all other CreateXXXField operators, name is the 3rd argument */ 189 190 Arg = AcpiPsGetArg (Op, 2); 191 } 192 193 if (!Arg) 194 { 195 return_ACPI_STATUS (AE_AML_NO_OPERAND); 196 } 197 198 if (WalkState->DeferredNode) 199 { 200 Node = WalkState->DeferredNode; 201 Status = AE_OK; 202 } 203 else 204 { 205 /* Execute flag should always be set when this function is entered */ 206 207 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 208 { 209 return_ACPI_STATUS (AE_AML_INTERNAL); 210 } 211 212 /* Creating new namespace node, should not already exist */ 213 214 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 215 ACPI_NS_ERROR_IF_FOUND; 216 217 /* 218 * Mark node temporary if we are executing a normal control 219 * method. (Don't mark if this is a module-level code method) 220 */ 221 if (WalkState->MethodNode && 222 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 223 { 224 Flags |= ACPI_NS_TEMPORARY; 225 } 226 227 /* Enter the NameString into the namespace */ 228 229 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 230 ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS1, 231 Flags, WalkState, &Node); 232 if (ACPI_FAILURE (Status)) 233 { 234 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 235 return_ACPI_STATUS (Status); 236 } 237 } 238 239 /* 240 * We could put the returned object (Node) on the object stack for later, 241 * but for now, we will put it in the "op" object that the parser uses, 242 * so we can get it again at the end of this scope. 243 */ 244 Op->Common.Node = Node; 245 246 /* 247 * If there is no object attached to the node, this node was just created 248 * and we need to create the field object. Otherwise, this was a lookup 249 * of an existing node and we don't want to create the field object again. 250 */ 251 ObjDesc = AcpiNsGetAttachedObject (Node); 252 if (ObjDesc) 253 { 254 return_ACPI_STATUS (AE_OK); 255 } 256 257 /* 258 * The Field definition is not fully parsed at this time. 259 * (We must save the address of the AML for the buffer and index operands) 260 */ 261 262 /* Create the buffer field object */ 263 264 ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_BUFFER_FIELD); 265 if (!ObjDesc) 266 { 267 Status = AE_NO_MEMORY; 268 goto Cleanup; 269 } 270 271 /* 272 * Remember location in AML stream of the field unit opcode and operands -- 273 * since the buffer and index operands must be evaluated. 274 */ 275 SecondDesc = ObjDesc->Common.NextObject; 276 SecondDesc->Extra.AmlStart = Op->Named.Data; 277 SecondDesc->Extra.AmlLength = Op->Named.Length; 278 ObjDesc->BufferField.Node = Node; 279 280 /* Attach constructed field descriptors to parent node */ 281 282 Status = AcpiNsAttachObject (Node, ObjDesc, ACPI_TYPE_BUFFER_FIELD); 283 if (ACPI_FAILURE (Status)) 284 { 285 goto Cleanup; 286 } 287 288 289Cleanup: 290 291 /* Remove local reference to the object */ 292 293 AcpiUtRemoveReference (ObjDesc); 294 return_ACPI_STATUS (Status); 295} 296 297 298/******************************************************************************* 299 * 300 * FUNCTION: AcpiDsGetFieldNames 301 * 302 * PARAMETERS: Info - CreateField info structure 303 * ` WalkState - Current method state 304 * Arg - First parser arg for the field name list 305 * 306 * RETURN: Status 307 * 308 * DESCRIPTION: Process all named fields in a field declaration. Names are 309 * entered into the namespace. 310 * 311 ******************************************************************************/ 312 313static ACPI_STATUS 314AcpiDsGetFieldNames ( 315 ACPI_CREATE_FIELD_INFO *Info, 316 ACPI_WALK_STATE *WalkState, 317 ACPI_PARSE_OBJECT *Arg) 318{ 319 ACPI_STATUS Status; 320 UINT64 Position; 321 ACPI_PARSE_OBJECT *Child; 322 323 324 ACPI_FUNCTION_TRACE_PTR (DsGetFieldNames, Info); 325 326 327 /* First field starts at bit zero */ 328 329 Info->FieldBitPosition = 0; 330 331 /* Process all elements in the field list (of parse nodes) */ 332 333 while (Arg) 334 { 335 /* 336 * Four types of field elements are handled: 337 * 1) Name - Enters a new named field into the namespace 338 * 2) Offset - specifies a bit offset 339 * 3) AccessAs - changes the access mode/attributes 340 * 4) Connection - Associate a resource template with the field 341 */ 342 switch (Arg->Common.AmlOpcode) 343 { 344 case AML_INT_RESERVEDFIELD_OP: 345 346 Position = (UINT64) Info->FieldBitPosition 347 + (UINT64) Arg->Common.Value.Size; 348 349 if (Position > ACPI_UINT32_MAX) 350 { 351 ACPI_ERROR ((AE_INFO, 352 "Bit offset within field too large (> 0xFFFFFFFF)")); 353 return_ACPI_STATUS (AE_SUPPORT); 354 } 355 356 Info->FieldBitPosition = (UINT32) Position; 357 break; 358 359 case AML_INT_ACCESSFIELD_OP: 360 case AML_INT_EXTACCESSFIELD_OP: 361 /* 362 * Get new AccessType, AccessAttribute, and AccessLength fields 363 * -- to be used for all field units that follow, until the 364 * end-of-field or another AccessAs keyword is encountered. 365 * NOTE. These three bytes are encoded in the integer value 366 * of the parseop for convenience. 367 * 368 * In FieldFlags, preserve the flag bits other than the 369 * ACCESS_TYPE bits. 370 */ 371 372 /* AccessType (ByteAcc, WordAcc, etc.) */ 373 374 Info->FieldFlags = (UINT8) 375 ((Info->FieldFlags & ~(AML_FIELD_ACCESS_TYPE_MASK)) | 376 ((UINT8) ((UINT32) (Arg->Common.Value.Integer & 0x07)))); 377 378 /* AccessAttribute (AttribQuick, AttribByte, etc.) */ 379 380 Info->Attribute = (UINT8) ((Arg->Common.Value.Integer >> 8) & 0xFF); 381 382 /* AccessLength (for serial/buffer protocols) */ 383 384 Info->AccessLength = (UINT8) ((Arg->Common.Value.Integer >> 16) & 0xFF); 385 break; 386 387 case AML_INT_CONNECTION_OP: 388 /* 389 * Clear any previous connection. New connection is used for all 390 * fields that follow, similar to AccessAs 391 */ 392 Info->ResourceBuffer = NULL; 393 Info->ConnectionNode = NULL; 394 395 /* 396 * A Connection() is either an actual resource descriptor (buffer) 397 * or a named reference to a resource template 398 */ 399 Child = Arg->Common.Value.Arg; 400 if (Child->Common.AmlOpcode == AML_INT_BYTELIST_OP) 401 { 402 Info->ResourceBuffer = Child->Named.Data; 403 Info->ResourceLength = (UINT16) Child->Named.Value.Integer; 404 } 405 else 406 { 407 /* Lookup the Connection() namepath, it should already exist */ 408 409 Status = AcpiNsLookup (WalkState->ScopeInfo, 410 Child->Common.Value.Name, ACPI_TYPE_ANY, 411 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 412 WalkState, &Info->ConnectionNode); 413 if (ACPI_FAILURE (Status)) 414 { 415 ACPI_ERROR_NAMESPACE (Child->Common.Value.Name, Status); 416 return_ACPI_STATUS (Status); 417 } 418 } 419 break; 420 421 case AML_INT_NAMEDFIELD_OP: 422 423 /* Lookup the name, it should already exist */ 424 425 Status = AcpiNsLookup (WalkState->ScopeInfo, 426 (char *) &Arg->Named.Name, Info->FieldType, 427 ACPI_IMODE_EXECUTE, ACPI_NS_DONT_OPEN_SCOPE, 428 WalkState, &Info->FieldNode); 429 if (ACPI_FAILURE (Status)) 430 { 431 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 432 return_ACPI_STATUS (Status); 433 } 434 else 435 { 436 Arg->Common.Node = Info->FieldNode; 437 Info->FieldBitLength = Arg->Common.Value.Size; 438 439 /* 440 * If there is no object attached to the node, this node was 441 * just created and we need to create the field object. 442 * Otherwise, this was a lookup of an existing node and we 443 * don't want to create the field object again. 444 */ 445 if (!AcpiNsGetAttachedObject (Info->FieldNode)) 446 { 447 Status = AcpiExPrepFieldValue (Info); 448 if (ACPI_FAILURE (Status)) 449 { 450 return_ACPI_STATUS (Status); 451 } 452 } 453 } 454 455 /* Keep track of bit position for the next field */ 456 457 Position = (UINT64) Info->FieldBitPosition 458 + (UINT64) Arg->Common.Value.Size; 459 460 if (Position > ACPI_UINT32_MAX) 461 { 462 ACPI_ERROR ((AE_INFO, 463 "Field [%4.4s] bit offset too large (> 0xFFFFFFFF)", 464 ACPI_CAST_PTR (char, &Info->FieldNode->Name))); 465 return_ACPI_STATUS (AE_SUPPORT); 466 } 467 468 Info->FieldBitPosition += Info->FieldBitLength; 469 break; 470 471 default: 472 473 ACPI_ERROR ((AE_INFO, 474 "Invalid opcode in field list: 0x%X", Arg->Common.AmlOpcode)); 475 return_ACPI_STATUS (AE_AML_BAD_OPCODE); 476 } 477 478 Arg = Arg->Common.Next; 479 } 480 481 return_ACPI_STATUS (AE_OK); 482} 483 484 485/******************************************************************************* 486 * 487 * FUNCTION: AcpiDsCreateField 488 * 489 * PARAMETERS: Op - Op containing the Field definition and args 490 * RegionNode - Object for the containing Operation Region 491 * ` WalkState - Current method state 492 * 493 * RETURN: Status 494 * 495 * DESCRIPTION: Create a new field in the specified operation region 496 * 497 ******************************************************************************/ 498 499ACPI_STATUS 500AcpiDsCreateField ( 501 ACPI_PARSE_OBJECT *Op, 502 ACPI_NAMESPACE_NODE *RegionNode, 503 ACPI_WALK_STATE *WalkState) 504{ 505 ACPI_STATUS Status; 506 ACPI_PARSE_OBJECT *Arg; 507 ACPI_CREATE_FIELD_INFO Info; 508 509 510 ACPI_FUNCTION_TRACE_PTR (DsCreateField, Op); 511 512 513 /* First arg is the name of the parent OpRegion (must already exist) */ 514 515 Arg = Op->Common.Value.Arg; 516 517 if (!RegionNode) 518 { 519 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 520 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 521 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 522#ifdef ACPI_ASL_COMPILER 523 Status = AcpiDsCreateExternalRegion (Status, Arg, 524 Arg->Common.Value.Name, WalkState, &RegionNode); 525#endif 526 if (ACPI_FAILURE (Status)) 527 { 528 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 529 return_ACPI_STATUS (Status); 530 } 531 } 532 533 ACPI_MEMSET (&Info, 0, sizeof (ACPI_CREATE_FIELD_INFO)); 534 535 /* Second arg is the field flags */ 536 537 Arg = Arg->Common.Next; 538 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 539 Info.Attribute = 0; 540 541 /* Each remaining arg is a Named Field */ 542 543 Info.FieldType = ACPI_TYPE_LOCAL_REGION_FIELD; 544 Info.RegionNode = RegionNode; 545 546 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 547 return_ACPI_STATUS (Status); 548} 549 550 551/******************************************************************************* 552 * 553 * FUNCTION: AcpiDsInitFieldObjects 554 * 555 * PARAMETERS: Op - Op containing the Field definition and args 556 * ` WalkState - Current method state 557 * 558 * RETURN: Status 559 * 560 * DESCRIPTION: For each "Field Unit" name in the argument list that is 561 * part of the field declaration, enter the name into the 562 * namespace. 563 * 564 ******************************************************************************/ 565 566ACPI_STATUS 567AcpiDsInitFieldObjects ( 568 ACPI_PARSE_OBJECT *Op, 569 ACPI_WALK_STATE *WalkState) 570{ 571 ACPI_STATUS Status; 572 ACPI_PARSE_OBJECT *Arg = NULL; 573 ACPI_NAMESPACE_NODE *Node; 574 UINT8 Type = 0; 575 UINT32 Flags; 576 577 578 ACPI_FUNCTION_TRACE_PTR (DsInitFieldObjects, Op); 579 580 581 /* Execute flag should always be set when this function is entered */ 582 583 if (!(WalkState->ParseFlags & ACPI_PARSE_EXECUTE)) 584 { 585 if (WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP) 586 { 587 /* BankField Op is deferred, just return OK */ 588 589 return_ACPI_STATUS (AE_OK); 590 } 591 592 return_ACPI_STATUS (AE_AML_INTERNAL); 593 } 594 595 /* 596 * Get the FieldList argument for this opcode. This is the start of the 597 * list of field elements. 598 */ 599 switch (WalkState->Opcode) 600 { 601 case AML_FIELD_OP: 602 603 Arg = AcpiPsGetArg (Op, 2); 604 Type = ACPI_TYPE_LOCAL_REGION_FIELD; 605 break; 606 607 case AML_BANK_FIELD_OP: 608 609 Arg = AcpiPsGetArg (Op, 4); 610 Type = ACPI_TYPE_LOCAL_BANK_FIELD; 611 break; 612 613 case AML_INDEX_FIELD_OP: 614 615 Arg = AcpiPsGetArg (Op, 3); 616 Type = ACPI_TYPE_LOCAL_INDEX_FIELD; 617 break; 618 619 default: 620 621 return_ACPI_STATUS (AE_BAD_PARAMETER); 622 } 623 624 /* Creating new namespace node(s), should not already exist */ 625 626 Flags = ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | 627 ACPI_NS_ERROR_IF_FOUND; 628 629 /* 630 * Mark node(s) temporary if we are executing a normal control 631 * method. (Don't mark if this is a module-level code method) 632 */ 633 if (WalkState->MethodNode && 634 !(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL)) 635 { 636 Flags |= ACPI_NS_TEMPORARY; 637 } 638 639 /* 640 * Walk the list of entries in the FieldList 641 * Note: FieldList can be of zero length. In this case, Arg will be NULL. 642 */ 643 while (Arg) 644 { 645 /* 646 * Ignore OFFSET/ACCESSAS/CONNECTION terms here; we are only interested 647 * in the field names in order to enter them into the namespace. 648 */ 649 if (Arg->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP) 650 { 651 Status = AcpiNsLookup (WalkState->ScopeInfo, 652 (char *) &Arg->Named.Name, Type, ACPI_IMODE_LOAD_PASS1, 653 Flags, WalkState, &Node); 654 if (ACPI_FAILURE (Status)) 655 { 656 ACPI_ERROR_NAMESPACE ((char *) &Arg->Named.Name, Status); 657 if (Status != AE_ALREADY_EXISTS) 658 { 659 return_ACPI_STATUS (Status); 660 } 661 662 /* Name already exists, just ignore this error */ 663 664 Status = AE_OK; 665 } 666 667 Arg->Common.Node = Node; 668 } 669 670 /* Get the next field element in the list */ 671 672 Arg = Arg->Common.Next; 673 } 674 675 return_ACPI_STATUS (AE_OK); 676} 677 678 679/******************************************************************************* 680 * 681 * FUNCTION: AcpiDsCreateBankField 682 * 683 * PARAMETERS: Op - Op containing the Field definition and args 684 * RegionNode - Object for the containing Operation Region 685 * WalkState - Current method state 686 * 687 * RETURN: Status 688 * 689 * DESCRIPTION: Create a new bank field in the specified operation region 690 * 691 ******************************************************************************/ 692 693ACPI_STATUS 694AcpiDsCreateBankField ( 695 ACPI_PARSE_OBJECT *Op, 696 ACPI_NAMESPACE_NODE *RegionNode, 697 ACPI_WALK_STATE *WalkState) 698{ 699 ACPI_STATUS Status; 700 ACPI_PARSE_OBJECT *Arg; 701 ACPI_CREATE_FIELD_INFO Info; 702 703 704 ACPI_FUNCTION_TRACE_PTR (DsCreateBankField, Op); 705 706 707 /* First arg is the name of the parent OpRegion (must already exist) */ 708 709 Arg = Op->Common.Value.Arg; 710 if (!RegionNode) 711 { 712 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.Name, 713 ACPI_TYPE_REGION, ACPI_IMODE_EXECUTE, 714 ACPI_NS_SEARCH_PARENT, WalkState, &RegionNode); 715#ifdef ACPI_ASL_COMPILER 716 Status = AcpiDsCreateExternalRegion (Status, Arg, 717 Arg->Common.Value.Name, WalkState, &RegionNode); 718#endif 719 if (ACPI_FAILURE (Status)) 720 { 721 ACPI_ERROR_NAMESPACE (Arg->Common.Value.Name, Status); 722 return_ACPI_STATUS (Status); 723 } 724 } 725 726 /* Second arg is the Bank Register (Field) (must already exist) */ 727 728 Arg = Arg->Common.Next; 729 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 730 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 731 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 732 if (ACPI_FAILURE (Status)) 733 { 734 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 735 return_ACPI_STATUS (Status); 736 } 737 738 /* 739 * Third arg is the BankValue 740 * This arg is a TermArg, not a constant 741 * It will be evaluated later, by AcpiDsEvalBankFieldOperands 742 */ 743 Arg = Arg->Common.Next; 744 745 /* Fourth arg is the field flags */ 746 747 Arg = Arg->Common.Next; 748 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 749 750 /* Each remaining arg is a Named Field */ 751 752 Info.FieldType = ACPI_TYPE_LOCAL_BANK_FIELD; 753 Info.RegionNode = RegionNode; 754 755 /* 756 * Use Info.DataRegisterNode to store BankField Op 757 * It's safe because DataRegisterNode will never be used when create bank field 758 * We store AmlStart and AmlLength in the BankField Op for late evaluation 759 * Used in AcpiExPrepFieldValue(Info) 760 * 761 * TBD: Or, should we add a field in ACPI_CREATE_FIELD_INFO, like "void *ParentOp"? 762 */ 763 Info.DataRegisterNode = (ACPI_NAMESPACE_NODE*) Op; 764 765 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 766 return_ACPI_STATUS (Status); 767} 768 769 770/******************************************************************************* 771 * 772 * FUNCTION: AcpiDsCreateIndexField 773 * 774 * PARAMETERS: Op - Op containing the Field definition and args 775 * RegionNode - Object for the containing Operation Region 776 * ` WalkState - Current method state 777 * 778 * RETURN: Status 779 * 780 * DESCRIPTION: Create a new index field in the specified operation region 781 * 782 ******************************************************************************/ 783 784ACPI_STATUS 785AcpiDsCreateIndexField ( 786 ACPI_PARSE_OBJECT *Op, 787 ACPI_NAMESPACE_NODE *RegionNode, 788 ACPI_WALK_STATE *WalkState) 789{ 790 ACPI_STATUS Status; 791 ACPI_PARSE_OBJECT *Arg; 792 ACPI_CREATE_FIELD_INFO Info; 793 794 795 ACPI_FUNCTION_TRACE_PTR (DsCreateIndexField, Op); 796 797 798 /* First arg is the name of the Index register (must already exist) */ 799 800 Arg = Op->Common.Value.Arg; 801 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 802 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 803 ACPI_NS_SEARCH_PARENT, WalkState, &Info.RegisterNode); 804 if (ACPI_FAILURE (Status)) 805 { 806 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 807 return_ACPI_STATUS (Status); 808 } 809 810 /* Second arg is the data register (must already exist) */ 811 812 Arg = Arg->Common.Next; 813 Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String, 814 ACPI_TYPE_ANY, ACPI_IMODE_EXECUTE, 815 ACPI_NS_SEARCH_PARENT, WalkState, &Info.DataRegisterNode); 816 if (ACPI_FAILURE (Status)) 817 { 818 ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status); 819 return_ACPI_STATUS (Status); 820 } 821 822 /* Next arg is the field flags */ 823 824 Arg = Arg->Common.Next; 825 Info.FieldFlags = (UINT8) Arg->Common.Value.Integer; 826 827 /* Each remaining arg is a Named Field */ 828 829 Info.FieldType = ACPI_TYPE_LOCAL_INDEX_FIELD; 830 Info.RegionNode = RegionNode; 831 832 Status = AcpiDsGetFieldNames (&Info, WalkState, Arg->Common.Next); 833 return_ACPI_STATUS (Status); 834} 835