drivers/bus/acpi/acpica/dispatcher/dswload2.c

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2018, 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 #include "acpi.h"
  45 #include "accommon.h"
  46 #include "acparser.h"
  47 #include "amlcode.h"
  48 #include "acdispat.h"
  49 #include "acinterp.h"
  50 #include "acnamesp.h"
  51 #include "acevents.h"
  52
  53 #define _COMPONENT          ACPI_DISPATCHER
  54         ACPI_MODULE_NAME    ("dswload2")
  55
  56
  57 /*******************************************************************************
  58  *
  59  * FUNCTION:    AcpiDsLoad2BeginOp
  60  *
  61  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  62  *              OutOp           - Wher to return op if a new one is created
  63  *
  64  * RETURN:      Status
  65  *
  66  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
  67  *
  68  ******************************************************************************/
  69
  70 ACPI_STATUS
  71 AcpiDsLoad2BeginOp (
  72     ACPI_WALK_STATE         *WalkState,
  73     ACPI_PARSE_OBJECT       **OutOp)
  74 {
  75     ACPI_PARSE_OBJECT       *Op;
  76     ACPI_NAMESPACE_NODE     *Node;
  77     ACPI_STATUS             Status;
  78     ACPI_OBJECT_TYPE        ObjectType;
  79     char                    *BufferPtr;
  80     UINT32                  Flags;
  81
  82
  83     ACPI_FUNCTION_TRACE (DsLoad2BeginOp);
  84
  85
  86     Op = WalkState->Op;
  87     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
  88
  89     if (Op)
  90     {
  91         if ((WalkState->ControlState) &&
  92             (WalkState->ControlState->Common.State ==
  93                 ACPI_CONTROL_CONDITIONAL_EXECUTING))
  94         {
  95             /* We are executing a while loop outside of a method */
  96
  97             Status = AcpiDsExecBeginOp (WalkState, OutOp);
  98             return_ACPI_STATUS (Status);
  99         }
 100
 101         /* We only care about Namespace opcodes here */
 102
 103         if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE)   &&
 104               (WalkState->Opcode != AML_INT_NAMEPATH_OP)) ||
 105             (!(WalkState->OpInfo->Flags & AML_NAMED)))
 106         {
 107             return_ACPI_STATUS (AE_OK);
 108         }
 109
 110         /* Get the name we are going to enter or lookup in the namespace */
 111
 112         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 113         {
 114             /* For Namepath op, get the path string */
 115
 116             BufferPtr = Op->Common.Value.String;
 117             if (!BufferPtr)
 118             {
 119                 /* No name, just exit */
 120
 121                 return_ACPI_STATUS (AE_OK);
 122             }
 123         }
 124         else
 125         {
 126             /* Get name from the op */
 127
 128             BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name);
 129         }
 130     }
 131     else
 132     {
 133         /* Get the namestring from the raw AML */
 134
 135         BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState);
 136     }
 137
 138     /* Map the opcode into an internal object type */
 139
 140     ObjectType = WalkState->OpInfo->ObjectType;
 141
 142     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 143         "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType));
 144
 145     switch (WalkState->Opcode)
 146     {
 147     case AML_FIELD_OP:
 148     case AML_BANK_FIELD_OP:
 149     case AML_INDEX_FIELD_OP:
 150
 151         Node = NULL;
 152         Status = AE_OK;
 153         break;
 154
 155     case AML_INT_NAMEPATH_OP:
 156         /*
 157          * The NamePath is an object reference to an existing object.
 158          * Don't enter the name into the namespace, but look it up
 159          * for use later.
 160          */
 161         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 162             ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 163             WalkState, &(Node));
 164         break;
 165
 166     case AML_SCOPE_OP:
 167
 168         /* Special case for Scope(\) -> refers to the Root node */
 169
 170         if (Op && (Op->Named.Node == AcpiGbl_RootNode))
 171         {
 172             Node = Op->Named.Node;
 173
 174             Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
 175             if (ACPI_FAILURE (Status))
 176             {
 177                 return_ACPI_STATUS (Status);
 178             }
 179         }
 180         else
 181         {
 182             /*
 183              * The Path is an object reference to an existing object.
 184              * Don't enter the name into the namespace, but look it up
 185              * for use later.
 186              */
 187             Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 188                 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 189                 WalkState, &(Node));
 190             if (ACPI_FAILURE (Status))
 191             {
 192 #ifdef ACPI_ASL_COMPILER
 193                 if (Status == AE_NOT_FOUND)
 194                 {
 195                     Status = AE_OK;
 196                 }
 197                 else
 198                 {
 199                     ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
 200                         BufferPtr, Status);
 201                 }
 202 #else
 203                 ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
 204                     BufferPtr, Status);
 205 #endif
 206                 return_ACPI_STATUS (Status);
 207             }
 208         }
 209
 210         /*
 211          * We must check to make sure that the target is
 212          * one of the opcodes that actually opens a scope
 213          */
 214         switch (Node->Type)
 215         {
 216         case ACPI_TYPE_ANY:
 217         case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 218         case ACPI_TYPE_DEVICE:
 219         case ACPI_TYPE_POWER:
 220         case ACPI_TYPE_PROCESSOR:
 221         case ACPI_TYPE_THERMAL:
 222
 223             /* These are acceptable types */
 224             break;
 225
 226         case ACPI_TYPE_INTEGER:
 227         case ACPI_TYPE_STRING:
 228         case ACPI_TYPE_BUFFER:
 229
 230             /*
 231              * These types we will allow, but we will change the type.
 232              * This enables some existing code of the form:
 233              *
 234              *  Name (DEB, 0)
 235              *  Scope (DEB) { ... }
 236              */
 237             ACPI_WARNING ((AE_INFO,
 238                 "Type override - [%4.4s] had invalid type (%s) "
 239                 "for Scope operator, changed to type ANY",
 240                 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));
 241
 242             Node->Type = ACPI_TYPE_ANY;
 243             WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
 244             break;
 245
 246         case ACPI_TYPE_METHOD:
 247
 248             /*
 249              * Allow scope change to root during execution of module-level
 250              * code. Root is typed METHOD during this time.
 251              */
 252             if ((Node == AcpiGbl_RootNode) &&
 253                 (WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
 254             {
 255                 break;
 256             }
 257
 258             /*lint -fallthrough */
 259
 260         default:
 261
 262             /* All other types are an error */
 263
 264             ACPI_ERROR ((AE_INFO,
 265                 "Invalid type (%s) for target of "
 266                 "Scope operator [%4.4s] (Cannot override)",
 267                 AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));
 268
 269             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 270         }
 271         break;
 272
 273     default:
 274
 275         /* All other opcodes */
 276
 277         if (Op && Op->Common.Node)
 278         {
 279             /* This op/node was previously entered into the namespace */
 280
 281             Node = Op->Common.Node;
 282
 283             if (AcpiNsOpensScope (ObjectType))
 284             {
 285                 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
 286                 if (ACPI_FAILURE (Status))
 287                 {
 288                     return_ACPI_STATUS (Status);
 289                 }
 290             }
 291
 292             return_ACPI_STATUS (AE_OK);
 293         }
 294
 295         /*
 296          * Enter the named type into the internal namespace. We enter the name
 297          * as we go downward in the parse tree. Any necessary subobjects that
 298          * involve arguments to the opcode must be created as we go back up the
 299          * parse tree later.
 300          *
 301          * Note: Name may already exist if we are executing a deferred opcode.
 302          */
 303         if (WalkState->DeferredNode)
 304         {
 305             /* This name is already in the namespace, get the node */
 306
 307             Node = WalkState->DeferredNode;
 308             Status = AE_OK;
 309             break;
 310         }
 311
 312         Flags = ACPI_NS_NO_UPSEARCH;
 313         if (WalkState->PassNumber == ACPI_IMODE_EXECUTE)
 314         {
 315             /* Execution mode, node cannot already exist, node is temporary */
 316
 317             Flags |= ACPI_NS_ERROR_IF_FOUND;
 318
 319             if (!(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
 320             {
 321                 Flags |= ACPI_NS_TEMPORARY;
 322             }
 323         }
 324
 325 #ifdef ACPI_ASL_COMPILER
 326
 327         /*
 328          * Do not open a scope for AML_EXTERNAL_OP
 329          * AcpiNsLookup can open a new scope based on the object type
 330          * of this op. AML_EXTERNAL_OP is a declaration rather than a
 331          * definition. In the case that this external is a method object,
 332          * AcpiNsLookup will open a new scope. However, an AML_EXTERNAL_OP
 333          * associated with the ACPI_TYPE_METHOD is a declaration, rather than
 334          * a definition. Flags is set to avoid opening a scope for any
 335          * AML_EXTERNAL_OP.
 336          */
 337         if (WalkState->Opcode == AML_EXTERNAL_OP)
 338         {
 339             Flags |= ACPI_NS_DONT_OPEN_SCOPE;
 340         }
 341 #endif
 342
 343         /*
 344          * For name creation opcodes, the full namepath prefix must
 345          * exist, except for the final (new) nameseg.
 346          */
 347         if (WalkState->OpInfo->Flags & AML_NAMED)
 348         {
 349             Flags |= ACPI_NS_PREFIX_MUST_EXIST;
 350         }
 351
 352         /* Add new entry or lookup existing entry */
 353
 354         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 355             ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node);
 356
 357         if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY))
 358         {
 359             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 360                 "***New Node [%4.4s] %p is temporary\n",
 361                 AcpiUtGetNodeName (Node), Node));
 362         }
 363         break;
 364     }
 365
 366     if (ACPI_FAILURE (Status))
 367     {
 368         ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
 369             BufferPtr, Status);
 370         return_ACPI_STATUS (Status);
 371     }
 372
 373     if (!Op)
 374     {
 375         /* Create a new op */
 376
 377         Op = AcpiPsAllocOp (WalkState->Opcode, WalkState->Aml);
 378         if (!Op)
 379         {
 380             return_ACPI_STATUS (AE_NO_MEMORY);
 381         }
 382
 383         /* Initialize the new op */
 384
 385         if (Node)
 386         {
 387             Op->Named.Name = Node->Name.Integer;
 388         }
 389         *OutOp = Op;
 390     }
 391
 392     /*
 393      * Put the Node in the "op" object that the parser uses, so we
 394      * can get it again quickly when this scope is closed
 395      */
 396     Op->Common.Node = Node;
 397     return_ACPI_STATUS (Status);
 398 }
 399
 400
 401 /*******************************************************************************
 402  *
 403  * FUNCTION:    AcpiDsLoad2EndOp
 404  *
 405  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 406  *
 407  * RETURN:      Status
 408  *
 409  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 410  *              both control methods and everything else.
 411  *
 412  ******************************************************************************/
 413
 414 ACPI_STATUS
 415 AcpiDsLoad2EndOp (
 416     ACPI_WALK_STATE         *WalkState)
 417 {
 418     ACPI_PARSE_OBJECT       *Op;
 419     ACPI_STATUS             Status = AE_OK;
 420     ACPI_OBJECT_TYPE        ObjectType;
 421     ACPI_NAMESPACE_NODE     *Node;
 422     ACPI_PARSE_OBJECT       *Arg;
 423     ACPI_NAMESPACE_NODE     *NewNode;
 424     UINT32                  i;
 425     UINT8                   RegionSpace;
 426
 427
 428     ACPI_FUNCTION_TRACE (DsLoad2EndOp);
 429
 430     Op = WalkState->Op;
 431     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 432         WalkState->OpInfo->Name, Op, WalkState));
 433
 434     /* Check if opcode had an associated namespace object */
 435
 436     if (!(WalkState->OpInfo->Flags & AML_NSOBJECT))
 437     {
 438         return_ACPI_STATUS (AE_OK);
 439     }
 440
 441     if (Op->Common.AmlOpcode == AML_SCOPE_OP)
 442     {
 443         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 444             "Ending scope Op=%p State=%p\n", Op, WalkState));
 445     }
 446
 447     ObjectType = WalkState->OpInfo->ObjectType;
 448
 449     /*
 450      * Get the Node/name from the earlier lookup
 451      * (It was saved in the *op structure)
 452      */
 453     Node = Op->Common.Node;
 454
 455     /*
 456      * Put the Node on the object stack (Contains the ACPI Name of
 457      * this object)
 458      */
 459     WalkState->Operands[0] = (void *) Node;
 460     WalkState->NumOperands = 1;
 461
 462     /* Pop the scope stack */
 463
 464     if (AcpiNsOpensScope (ObjectType) &&
 465        (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP))
 466     {
 467         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 468             AcpiUtGetTypeName (ObjectType), Op));
 469
 470         Status = AcpiDsScopeStackPop (WalkState);
 471         if (ACPI_FAILURE (Status))
 472         {
 473             goto Cleanup;
 474         }
 475     }
 476
 477     /*
 478      * Named operations are as follows:
 479      *
 480      * AML_ALIAS
 481      * AML_BANKFIELD
 482      * AML_CREATEBITFIELD
 483      * AML_CREATEBYTEFIELD
 484      * AML_CREATEDWORDFIELD
 485      * AML_CREATEFIELD
 486      * AML_CREATEQWORDFIELD
 487      * AML_CREATEWORDFIELD
 488      * AML_DATA_REGION
 489      * AML_DEVICE
 490      * AML_EVENT
 491      * AML_FIELD
 492      * AML_INDEXFIELD
 493      * AML_METHOD
 494      * AML_METHODCALL
 495      * AML_MUTEX
 496      * AML_NAME
 497      * AML_NAMEDFIELD
 498      * AML_OPREGION
 499      * AML_POWERRES
 500      * AML_PROCESSOR
 501      * AML_SCOPE
 502      * AML_THERMALZONE
 503      */
 504
 505     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 506         "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
 507         AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node));
 508
 509     /* Decode the opcode */
 510
 511     Arg = Op->Common.Value.Arg;
 512
 513     switch (WalkState->OpInfo->Type)
 514     {
 515
 516     case AML_TYPE_CREATE_FIELD:
 517         /*
 518          * Create the field object, but the field buffer and index must
 519          * be evaluated later during the execution phase
 520          */
 521         Status = AcpiDsCreateBufferField (Op, WalkState);
 522         break;
 523
 524      case AML_TYPE_NAMED_FIELD:
 525         /*
 526          * If we are executing a method, initialize the field
 527          */
 528         if (WalkState->MethodNode)
 529         {
 530             Status = AcpiDsInitFieldObjects (Op, WalkState);
 531         }
 532
 533         switch (Op->Common.AmlOpcode)
 534         {
 535         case AML_INDEX_FIELD_OP:
 536
 537             Status = AcpiDsCreateIndexField (
 538                 Op, (ACPI_HANDLE) Arg->Common.Node, WalkState);
 539             break;
 540
 541         case AML_BANK_FIELD_OP:
 542
 543             Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState);
 544             break;
 545
 546         case AML_FIELD_OP:
 547
 548             Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState);
 549             break;
 550
 551         default:
 552
 553             /* All NAMED_FIELD opcodes must be handled above */
 554             break;
 555         }
 556         break;
 557
 558      case AML_TYPE_NAMED_SIMPLE:
 559
 560         Status = AcpiDsCreateOperands (WalkState, Arg);
 561         if (ACPI_FAILURE (Status))
 562         {
 563             goto Cleanup;
 564         }
 565
 566         switch (Op->Common.AmlOpcode)
 567         {
 568         case AML_PROCESSOR_OP:
 569
 570             Status = AcpiExCreateProcessor (WalkState);
 571             break;
 572
 573         case AML_POWER_RESOURCE_OP:
 574
 575             Status = AcpiExCreatePowerResource (WalkState);
 576             break;
 577
 578         case AML_MUTEX_OP:
 579
 580             Status = AcpiExCreateMutex (WalkState);
 581             break;
 582
 583         case AML_EVENT_OP:
 584
 585             Status = AcpiExCreateEvent (WalkState);
 586             break;
 587
 588         case AML_ALIAS_OP:
 589
 590             Status = AcpiExCreateAlias (WalkState);
 591             break;
 592
 593         default:
 594
 595             /* Unknown opcode */
 596
 597             Status = AE_OK;
 598             goto Cleanup;
 599         }
 600
 601         /* Delete operands */
 602
 603         for (i = 1; i < WalkState->NumOperands; i++)
 604         {
 605             AcpiUtRemoveReference (WalkState->Operands[i]);
 606             WalkState->Operands[i] = NULL;
 607         }
 608
 609         break;
 610
 611     case AML_TYPE_NAMED_COMPLEX:
 612
 613         switch (Op->Common.AmlOpcode)
 614         {
 615         case AML_REGION_OP:
 616         case AML_DATA_REGION_OP:
 617
 618             if (Op->Common.AmlOpcode == AML_REGION_OP)
 619             {
 620                 RegionSpace = (ACPI_ADR_SPACE_TYPE)
 621                     ((Op->Common.Value.Arg)->Common.Value.Integer);
 622             }
 623             else
 624             {
 625                 RegionSpace = ACPI_ADR_SPACE_DATA_TABLE;
 626             }
 627
 628             /*
 629              * The OpRegion is not fully parsed at this time. The only valid
 630              * argument is the SpaceId. (We must save the address of the
 631              * AML of the address and length operands)
 632              *
 633              * If we have a valid region, initialize it. The namespace is
 634              * unlocked at this point.
 635              *
 636              * Need to unlock interpreter if it is locked (if we are running
 637              * a control method), in order to allow _REG methods to be run
 638              * during AcpiEvInitializeRegion.
 639              */
 640             if (WalkState->MethodNode)
 641             {
 642                 /*
 643                  * Executing a method: initialize the region and unlock
 644                  * the interpreter
 645                  */
 646                 Status = AcpiExCreateRegion (Op->Named.Data,
 647                     Op->Named.Length, RegionSpace, WalkState);
 648                 if (ACPI_FAILURE (Status))
 649                 {
 650                     return_ACPI_STATUS (Status);
 651                 }
 652             }
 653
 654             Status = AcpiEvInitializeRegion (
 655                 AcpiNsGetAttachedObject (Node));
 656             break;
 657
 658         case AML_NAME_OP:
 659
 660             Status = AcpiDsCreateNode (WalkState, Node, Op);
 661             break;
 662
 663         case AML_METHOD_OP:
 664             /*
 665              * MethodOp PkgLength NameString MethodFlags TermList
 666              *
 667              * Note: We must create the method node/object pair as soon as we
 668              * see the method declaration. This allows later pass1 parsing
 669              * of invocations of the method (need to know the number of
 670              * arguments.)
 671              */
 672             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 673                 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
 674                 WalkState, Op, Op->Named.Node));
 675
 676             if (!AcpiNsGetAttachedObject (Op->Named.Node))
 677             {
 678                 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
 679                 WalkState->NumOperands = 1;
 680
 681                 Status = AcpiDsCreateOperands (
 682                     WalkState, Op->Common.Value.Arg);
 683                 if (ACPI_SUCCESS (Status))
 684                 {
 685                     Status = AcpiExCreateMethod (
 686                         Op->Named.Data, Op->Named.Length, WalkState);
 687                 }
 688
 689                 WalkState->Operands[0] = NULL;
 690                 WalkState->NumOperands = 0;
 691
 692                 if (ACPI_FAILURE (Status))
 693                 {
 694                     return_ACPI_STATUS (Status);
 695                 }
 696             }
 697             break;
 698
 699
 700         default:
 701
 702             /* All NAMED_COMPLEX opcodes must be handled above */
 703             break;
 704         }
 705         break;
 706
 707     case AML_CLASS_INTERNAL:
 708
 709         /* case AML_INT_NAMEPATH_OP: */
 710         break;
 711
 712     case AML_CLASS_METHOD_CALL:
 713
 714         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 715             "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
 716             WalkState, Op, Node));
 717
 718         /*
 719          * Lookup the method name and save the Node
 720          */
 721         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 722             ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 723             ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 724             WalkState, &(NewNode));
 725         if (ACPI_SUCCESS (Status))
 726         {
 727             /*
 728              * Make sure that what we found is indeed a method
 729              * We didn't search for a method on purpose, to see if the name
 730              * would resolve
 731              */
 732             if (NewNode->Type != ACPI_TYPE_METHOD)
 733             {
 734                 Status = AE_AML_OPERAND_TYPE;
 735             }
 736
 737             /* We could put the returned object (Node) on the object stack for
 738              * later, but for now, we will put it in the "op" object that the
 739              * parser uses, so we can get it again at the end of this scope
 740              */
 741             Op->Common.Node = NewNode;
 742         }
 743         else
 744         {
 745             ACPI_ERROR_NAMESPACE (WalkState->ScopeInfo,
 746                 Arg->Common.Value.String, Status);
 747         }
 748         break;
 749
 750
 751     default:
 752
 753         break;
 754     }
 755
 756 Cleanup:
 757
 758     /* Remove the Node pushed at the very beginning */
 759
 760     WalkState->Operands[0] = NULL;
 761     WalkState->NumOperands = 0;
 762     return_ACPI_STATUS (Status);
 763 }