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

   1 /******************************************************************************
   2  *
   3  * Module Name: dswload2 - Dispatcher second pass namespace load callbacks
   4  *
   5  *****************************************************************************/
   6
   7 /******************************************************************************
   8  *
   9  * 1. Copyright Notice
  10  *
  11  * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
  12  * All rights reserved.
  13  *
  14  * 2. License
  15  *
  16  * 2.1. This is your license from Intel Corp. under its intellectual property
  17  * rights.  You may have additional license terms from the party that provided
  18  * you this software, covering your right to use that party's intellectual
  19  * property rights.
  20  *
  21  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  22  * copy of the source code appearing in this file ("Covered Code") an
  23  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  24  * base code distributed originally by Intel ("Original Intel Code") to copy,
  25  * make derivatives, distribute, use and display any portion of the Covered
  26  * Code in any form, with the right to sublicense such rights; and
  27  *
  28  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  29  * license (with the right to sublicense), under only those claims of Intel
  30  * patents that are infringed by the Original Intel Code, to make, use, sell,
  31  * offer to sell, and import the Covered Code and derivative works thereof
  32  * solely to the minimum extent necessary to exercise the above copyright
  33  * license, and in no event shall the patent license extend to any additions
  34  * to or modifications of the Original Intel Code.  No other license or right
  35  * is granted directly or by implication, estoppel or otherwise;
  36  *
  37  * The above copyright and patent license is granted only if the following
  38  * conditions are met:
  39  *
  40  * 3. Conditions
  41  *
  42  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  43  * Redistribution of source code of any substantial portion of the Covered
  44  * Code or modification with rights to further distribute source must include
  45  * the above Copyright Notice, the above License, this list of Conditions,
  46  * and the following Disclaimer and Export Compliance provision.  In addition,
  47  * Licensee must cause all Covered Code to which Licensee contributes to
  48  * contain a file documenting the changes Licensee made to create that Covered
  49  * Code and the date of any change.  Licensee must include in that file the
  50  * documentation of any changes made by any predecessor Licensee.  Licensee
  51  * must include a prominent statement that the modification is derived,
  52  * directly or indirectly, from Original Intel Code.
  53  *
  54  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  55  * Redistribution of source code of any substantial portion of the Covered
  56  * Code or modification without rights to further distribute source must
  57  * include the following Disclaimer and Export Compliance provision in the
  58  * documentation and/or other materials provided with distribution.  In
  59  * addition, Licensee may not authorize further sublicense of source of any
  60  * portion of the Covered Code, and must include terms to the effect that the
  61  * license from Licensee to its licensee is limited to the intellectual
  62  * property embodied in the software Licensee provides to its licensee, and
  63  * not to intellectual property embodied in modifications its licensee may
  64  * make.
  65  *
  66  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  67  * substantial portion of the Covered Code or modification must reproduce the
  68  * above Copyright Notice, and the following Disclaimer and Export Compliance
  69  * provision in the documentation and/or other materials provided with the
  70  * distribution.
  71  *
  72  * 3.4. Intel retains all right, title, and interest in and to the Original
  73  * Intel Code.
  74  *
  75  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  76  * Intel shall be used in advertising or otherwise to promote the sale, use or
  77  * other dealings in products derived from or relating to the Covered Code
  78  * without prior written authorization from Intel.
  79  *
  80  * 4. Disclaimer and Export Compliance
  81  *
  82  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  83  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  84  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  85  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  86  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  87  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  88  * PARTICULAR PURPOSE.
  89  *
  90  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  91  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  92  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  93  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  94  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  95  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  96  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  97  * LIMITED REMEDY.
  98  *
  99  * 4.3. Licensee shall not export, either directly or indirectly, any of this
 100  * software or system incorporating such software without first obtaining any
 101  * required license or other approval from the U. S. Department of Commerce or
 102  * any other agency or department of the United States Government.  In the
 103  * event Licensee exports any such software from the United States or
 104  * re-exports any such software from a foreign destination, Licensee shall
 105  * ensure that the distribution and export/re-export of the software is in
 106  * compliance with all laws, regulations, orders, or other restrictions of the
 107  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
 108  * any of its subsidiaries will export/re-export any technical data, process,
 109  * software, or service, directly or indirectly, to any country for which the
 110  * United States government or any agency thereof requires an export license,
 111  * other governmental approval, or letter of assurance, without first obtaining
 112  * such license, approval or letter.
 113  *
 114  *****************************************************************************/
 115
 116 #define __DSWLOAD2_C__
 117
 118 #include "acpi.h"
 119 #include "accommon.h"
 120 #include "acparser.h"
 121 #include "amlcode.h"
 122 #include "acdispat.h"
 123 #include "acinterp.h"
 124 #include "acnamesp.h"
 125 #include "acevents.h"
 126
 127 #define _COMPONENT          ACPI_DISPATCHER
 128         ACPI_MODULE_NAME    ("dswload2")
 129
 130
 131 /*******************************************************************************
 132  *
 133  * FUNCTION:    AcpiDsLoad2BeginOp
 134  *
 135  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 136  *              OutOp           - Wher to return op if a new one is created
 137  *
 138  * RETURN:      Status
 139  *
 140  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
 141  *
 142  ******************************************************************************/
 143
 144 ACPI_STATUS
 145 AcpiDsLoad2BeginOp (
 146     ACPI_WALK_STATE         *WalkState,
 147     ACPI_PARSE_OBJECT       **OutOp)
 148 {
 149     ACPI_PARSE_OBJECT       *Op;
 150     ACPI_NAMESPACE_NODE     *Node;
 151     ACPI_STATUS             Status;
 152     ACPI_OBJECT_TYPE        ObjectType;
 153     char                    *BufferPtr;
 154     UINT32                  Flags;
 155
 156
 157     ACPI_FUNCTION_TRACE (DsLoad2BeginOp);
 158
 159
 160     Op = WalkState->Op;
 161     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
 162
 163     if (Op)
 164     {
 165         if ((WalkState->ControlState) &&
 166             (WalkState->ControlState->Common.State ==
 167                 ACPI_CONTROL_CONDITIONAL_EXECUTING))
 168         {
 169             /* We are executing a while loop outside of a method */
 170
 171             Status = AcpiDsExecBeginOp (WalkState, OutOp);
 172             return_ACPI_STATUS (Status);
 173         }
 174
 175         /* We only care about Namespace opcodes here */
 176
 177         if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE)   &&
 178               (WalkState->Opcode != AML_INT_NAMEPATH_OP)) ||
 179             (!(WalkState->OpInfo->Flags & AML_NAMED)))
 180         {
 181             return_ACPI_STATUS (AE_OK);
 182         }
 183
 184         /* Get the name we are going to enter or lookup in the namespace */
 185
 186         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
 187         {
 188             /* For Namepath op, get the path string */
 189
 190             BufferPtr = Op->Common.Value.String;
 191             if (!BufferPtr)
 192             {
 193                 /* No name, just exit */
 194
 195                 return_ACPI_STATUS (AE_OK);
 196             }
 197         }
 198         else
 199         {
 200             /* Get name from the op */
 201
 202             BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name);
 203         }
 204     }
 205     else
 206     {
 207         /* Get the namestring from the raw AML */
 208
 209         BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState);
 210     }
 211
 212     /* Map the opcode into an internal object type */
 213
 214     ObjectType = WalkState->OpInfo->ObjectType;
 215
 216     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 217         "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType));
 218
 219     switch (WalkState->Opcode)
 220     {
 221     case AML_FIELD_OP:
 222     case AML_BANK_FIELD_OP:
 223     case AML_INDEX_FIELD_OP:
 224
 225         Node = NULL;
 226         Status = AE_OK;
 227         break;
 228
 229     case AML_INT_NAMEPATH_OP:
 230         /*
 231          * The NamePath is an object reference to an existing object.
 232          * Don't enter the name into the namespace, but look it up
 233          * for use later.
 234          */
 235         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 236                         ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 237                         WalkState, &(Node));
 238         break;
 239
 240     case AML_SCOPE_OP:
 241
 242         /* Special case for Scope(\) -> refers to the Root node */
 243
 244         if (Op && (Op->Named.Node == AcpiGbl_RootNode))
 245         {
 246             Node = Op->Named.Node;
 247
 248             Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
 249             if (ACPI_FAILURE (Status))
 250             {
 251                 return_ACPI_STATUS (Status);
 252             }
 253         }
 254         else
 255         {
 256             /*
 257              * The Path is an object reference to an existing object.
 258              * Don't enter the name into the namespace, but look it up
 259              * for use later.
 260              */
 261             Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 262                         ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
 263                         WalkState, &(Node));
 264             if (ACPI_FAILURE (Status))
 265             {
 266 #ifdef ACPI_ASL_COMPILER
 267                 if (Status == AE_NOT_FOUND)
 268                 {
 269                     Status = AE_OK;
 270                 }
 271                 else
 272                 {
 273                     ACPI_ERROR_NAMESPACE (BufferPtr, Status);
 274                 }
 275 #else
 276                 ACPI_ERROR_NAMESPACE (BufferPtr, Status);
 277 #endif
 278                 return_ACPI_STATUS (Status);
 279             }
 280         }
 281
 282         /*
 283          * We must check to make sure that the target is
 284          * one of the opcodes that actually opens a scope
 285          */
 286         switch (Node->Type)
 287         {
 288         case ACPI_TYPE_ANY:
 289         case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
 290         case ACPI_TYPE_DEVICE:
 291         case ACPI_TYPE_POWER:
 292         case ACPI_TYPE_PROCESSOR:
 293         case ACPI_TYPE_THERMAL:
 294
 295             /* These are acceptable types */
 296             break;
 297
 298         case ACPI_TYPE_INTEGER:
 299         case ACPI_TYPE_STRING:
 300         case ACPI_TYPE_BUFFER:
 301
 302             /*
 303              * These types we will allow, but we will change the type.
 304              * This enables some existing code of the form:
 305              *
 306              *  Name (DEB, 0)
 307              *  Scope (DEB) { ... }
 308              */
 309             ACPI_WARNING ((AE_INFO,
 310                 "Type override - [%4.4s] had invalid type (%s) "
 311                 "for Scope operator, changed to type ANY\n",
 312                 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type)));
 313
 314             Node->Type = ACPI_TYPE_ANY;
 315             WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
 316             break;
 317
 318         default:
 319
 320             /* All other types are an error */
 321
 322             ACPI_ERROR ((AE_INFO,
 323                 "Invalid type (%s) for target of "
 324                 "Scope operator [%4.4s] (Cannot override)",
 325                 AcpiUtGetTypeName (Node->Type), AcpiUtGetNodeName (Node)));
 326
 327             return (AE_AML_OPERAND_TYPE);
 328         }
 329         break;
 330
 331     default:
 332
 333         /* All other opcodes */
 334
 335         if (Op && Op->Common.Node)
 336         {
 337             /* This op/node was previously entered into the namespace */
 338
 339             Node = Op->Common.Node;
 340
 341             if (AcpiNsOpensScope (ObjectType))
 342             {
 343                 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
 344                 if (ACPI_FAILURE (Status))
 345                 {
 346                     return_ACPI_STATUS (Status);
 347                 }
 348             }
 349
 350             return_ACPI_STATUS (AE_OK);
 351         }
 352
 353         /*
 354          * Enter the named type into the internal namespace. We enter the name
 355          * as we go downward in the parse tree. Any necessary subobjects that
 356          * involve arguments to the opcode must be created as we go back up the
 357          * parse tree later.
 358          *
 359          * Note: Name may already exist if we are executing a deferred opcode.
 360          */
 361         if (WalkState->DeferredNode)
 362         {
 363             /* This name is already in the namespace, get the node */
 364
 365             Node = WalkState->DeferredNode;
 366             Status = AE_OK;
 367             break;
 368         }
 369
 370         Flags = ACPI_NS_NO_UPSEARCH;
 371         if (WalkState->PassNumber == ACPI_IMODE_EXECUTE)
 372         {
 373             /* Execution mode, node cannot already exist, node is temporary */
 374
 375             Flags |= ACPI_NS_ERROR_IF_FOUND;
 376
 377             if (!(WalkState->ParseFlags & ACPI_PARSE_MODULE_LEVEL))
 378             {
 379                 Flags |= ACPI_NS_TEMPORARY;
 380             }
 381         }
 382
 383         /* Add new entry or lookup existing entry */
 384
 385         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
 386                     ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node);
 387
 388         if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY))
 389         {
 390             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 391                 "***New Node [%4.4s] %p is temporary\n",
 392                 AcpiUtGetNodeName (Node), Node));
 393         }
 394         break;
 395     }
 396
 397     if (ACPI_FAILURE (Status))
 398     {
 399         ACPI_ERROR_NAMESPACE (BufferPtr, Status);
 400         return_ACPI_STATUS (Status);
 401     }
 402
 403     if (!Op)
 404     {
 405         /* Create a new op */
 406
 407         Op = AcpiPsAllocOp (WalkState->Opcode);
 408         if (!Op)
 409         {
 410             return_ACPI_STATUS (AE_NO_MEMORY);
 411         }
 412
 413         /* Initialize the new op */
 414
 415         if (Node)
 416         {
 417             Op->Named.Name = Node->Name.Integer;
 418         }
 419         *OutOp = Op;
 420     }
 421
 422     /*
 423      * Put the Node in the "op" object that the parser uses, so we
 424      * can get it again quickly when this scope is closed
 425      */
 426     Op->Common.Node = Node;
 427     return_ACPI_STATUS (Status);
 428 }
 429
 430
 431 /*******************************************************************************
 432  *
 433  * FUNCTION:    AcpiDsLoad2EndOp
 434  *
 435  * PARAMETERS:  WalkState       - Current state of the parse tree walk
 436  *
 437  * RETURN:      Status
 438  *
 439  * DESCRIPTION: Ascending callback used during the loading of the namespace,
 440  *              both control methods and everything else.
 441  *
 442  ******************************************************************************/
 443
 444 ACPI_STATUS
 445 AcpiDsLoad2EndOp (
 446     ACPI_WALK_STATE         *WalkState)
 447 {
 448     ACPI_PARSE_OBJECT       *Op;
 449     ACPI_STATUS             Status = AE_OK;
 450     ACPI_OBJECT_TYPE        ObjectType;
 451     ACPI_NAMESPACE_NODE     *Node;
 452     ACPI_PARSE_OBJECT       *Arg;
 453     ACPI_NAMESPACE_NODE     *NewNode;
 454 #ifndef ACPI_NO_METHOD_EXECUTION
 455     UINT32                  i;
 456     UINT8                   RegionSpace;
 457 #endif
 458
 459
 460     ACPI_FUNCTION_TRACE (DsLoad2EndOp);
 461
 462     Op = WalkState->Op;
 463     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
 464             WalkState->OpInfo->Name, Op, WalkState));
 465
 466     /* Check if opcode had an associated namespace object */
 467
 468     if (!(WalkState->OpInfo->Flags & AML_NSOBJECT))
 469     {
 470         return_ACPI_STATUS (AE_OK);
 471     }
 472
 473     if (Op->Common.AmlOpcode == AML_SCOPE_OP)
 474     {
 475         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 476             "Ending scope Op=%p State=%p\n", Op, WalkState));
 477     }
 478
 479     ObjectType = WalkState->OpInfo->ObjectType;
 480
 481     /*
 482      * Get the Node/name from the earlier lookup
 483      * (It was saved in the *op structure)
 484      */
 485     Node = Op->Common.Node;
 486
 487     /*
 488      * Put the Node on the object stack (Contains the ACPI Name of
 489      * this object)
 490      */
 491     WalkState->Operands[0] = (void *) Node;
 492     WalkState->NumOperands = 1;
 493
 494     /* Pop the scope stack */
 495
 496     if (AcpiNsOpensScope (ObjectType) &&
 497        (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP))
 498     {
 499         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
 500             AcpiUtGetTypeName (ObjectType), Op));
 501
 502         Status = AcpiDsScopeStackPop (WalkState);
 503         if (ACPI_FAILURE (Status))
 504         {
 505             goto Cleanup;
 506         }
 507     }
 508
 509     /*
 510      * Named operations are as follows:
 511      *
 512      * AML_ALIAS
 513      * AML_BANKFIELD
 514      * AML_CREATEBITFIELD
 515      * AML_CREATEBYTEFIELD
 516      * AML_CREATEDWORDFIELD
 517      * AML_CREATEFIELD
 518      * AML_CREATEQWORDFIELD
 519      * AML_CREATEWORDFIELD
 520      * AML_DATA_REGION
 521      * AML_DEVICE
 522      * AML_EVENT
 523      * AML_FIELD
 524      * AML_INDEXFIELD
 525      * AML_METHOD
 526      * AML_METHODCALL
 527      * AML_MUTEX
 528      * AML_NAME
 529      * AML_NAMEDFIELD
 530      * AML_OPREGION
 531      * AML_POWERRES
 532      * AML_PROCESSOR
 533      * AML_SCOPE
 534      * AML_THERMALZONE
 535      */
 536
 537     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 538         "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
 539         AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node));
 540
 541     /* Decode the opcode */
 542
 543     Arg = Op->Common.Value.Arg;
 544
 545     switch (WalkState->OpInfo->Type)
 546     {
 547 #ifndef ACPI_NO_METHOD_EXECUTION
 548
 549     case AML_TYPE_CREATE_FIELD:
 550         /*
 551          * Create the field object, but the field buffer and index must
 552          * be evaluated later during the execution phase
 553          */
 554         Status = AcpiDsCreateBufferField (Op, WalkState);
 555         break;
 556
 557
 558      case AML_TYPE_NAMED_FIELD:
 559         /*
 560          * If we are executing a method, initialize the field
 561          */
 562         if (WalkState->MethodNode)
 563         {
 564             Status = AcpiDsInitFieldObjects (Op, WalkState);
 565         }
 566
 567         switch (Op->Common.AmlOpcode)
 568         {
 569         case AML_INDEX_FIELD_OP:
 570
 571             Status = AcpiDsCreateIndexField (Op, (ACPI_HANDLE) Arg->Common.Node,
 572                         WalkState);
 573             break;
 574
 575         case AML_BANK_FIELD_OP:
 576
 577             Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState);
 578             break;
 579
 580         case AML_FIELD_OP:
 581
 582             Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState);
 583             break;
 584
 585         default:
 586             /* All NAMED_FIELD opcodes must be handled above */
 587             break;
 588         }
 589         break;
 590
 591
 592      case AML_TYPE_NAMED_SIMPLE:
 593
 594         Status = AcpiDsCreateOperands (WalkState, Arg);
 595         if (ACPI_FAILURE (Status))
 596         {
 597             goto Cleanup;
 598         }
 599
 600         switch (Op->Common.AmlOpcode)
 601         {
 602         case AML_PROCESSOR_OP:
 603
 604             Status = AcpiExCreateProcessor (WalkState);
 605             break;
 606
 607         case AML_POWER_RES_OP:
 608
 609             Status = AcpiExCreatePowerResource (WalkState);
 610             break;
 611
 612         case AML_MUTEX_OP:
 613
 614             Status = AcpiExCreateMutex (WalkState);
 615             break;
 616
 617         case AML_EVENT_OP:
 618
 619             Status = AcpiExCreateEvent (WalkState);
 620             break;
 621
 622
 623         case AML_ALIAS_OP:
 624
 625             Status = AcpiExCreateAlias (WalkState);
 626             break;
 627
 628         default:
 629             /* Unknown opcode */
 630
 631             Status = AE_OK;
 632             goto Cleanup;
 633         }
 634
 635         /* Delete operands */
 636
 637         for (i = 1; i < WalkState->NumOperands; i++)
 638         {
 639             AcpiUtRemoveReference (WalkState->Operands[i]);
 640             WalkState->Operands[i] = NULL;
 641         }
 642
 643         break;
 644 #endif /* ACPI_NO_METHOD_EXECUTION */
 645
 646     case AML_TYPE_NAMED_COMPLEX:
 647
 648         switch (Op->Common.AmlOpcode)
 649         {
 650 #ifndef ACPI_NO_METHOD_EXECUTION
 651         case AML_REGION_OP:
 652         case AML_DATA_REGION_OP:
 653
 654             if (Op->Common.AmlOpcode == AML_REGION_OP)
 655             {
 656                 RegionSpace = (ACPI_ADR_SPACE_TYPE)
 657                       ((Op->Common.Value.Arg)->Common.Value.Integer);
 658             }
 659             else
 660             {
 661                 RegionSpace = ACPI_ADR_SPACE_DATA_TABLE;
 662             }
 663
 664             /*
 665              * The OpRegion is not fully parsed at this time. The only valid
 666              * argument is the SpaceId. (We must save the address of the
 667              * AML of the address and length operands)
 668              *
 669              * If we have a valid region, initialize it. The namespace is
 670              * unlocked at this point.
 671              *
 672              * Need to unlock interpreter if it is locked (if we are running
 673              * a control method), in order to allow _REG methods to be run
 674              * during AcpiEvInitializeRegion.
 675              */
 676             if (WalkState->MethodNode)
 677             {
 678                 /*
 679                  * Executing a method: initialize the region and unlock
 680                  * the interpreter
 681                  */
 682                 Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
 683                             RegionSpace, WalkState);
 684                 if (ACPI_FAILURE (Status))
 685                 {
 686                     return (Status);
 687                 }
 688
 689                 AcpiExExitInterpreter ();
 690             }
 691
 692             Status = AcpiEvInitializeRegion (AcpiNsGetAttachedObject (Node),
 693                         FALSE);
 694             if (WalkState->MethodNode)
 695             {
 696                 AcpiExEnterInterpreter ();
 697             }
 698
 699             if (ACPI_FAILURE (Status))
 700             {
 701                 /*
 702                  *  If AE_NOT_EXIST is returned, it is not fatal
 703                  *  because many regions get created before a handler
 704                  *  is installed for said region.
 705                  */
 706                 if (AE_NOT_EXIST == Status)
 707                 {
 708                     Status = AE_OK;
 709                 }
 710             }
 711             break;
 712
 713
 714         case AML_NAME_OP:
 715
 716             Status = AcpiDsCreateNode (WalkState, Node, Op);
 717             break;
 718
 719
 720         case AML_METHOD_OP:
 721             /*
 722              * MethodOp PkgLength NameString MethodFlags TermList
 723              *
 724              * Note: We must create the method node/object pair as soon as we
 725              * see the method declaration. This allows later pass1 parsing
 726              * of invocations of the method (need to know the number of
 727              * arguments.)
 728              */
 729             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 730                 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
 731                 WalkState, Op, Op->Named.Node));
 732
 733             if (!AcpiNsGetAttachedObject (Op->Named.Node))
 734             {
 735                 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
 736                 WalkState->NumOperands = 1;
 737
 738                 Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
 739                 if (ACPI_SUCCESS (Status))
 740                 {
 741                     Status = AcpiExCreateMethod (Op->Named.Data,
 742                                         Op->Named.Length, WalkState);
 743                 }
 744                 WalkState->Operands[0] = NULL;
 745                 WalkState->NumOperands = 0;
 746
 747                 if (ACPI_FAILURE (Status))
 748                 {
 749                     return_ACPI_STATUS (Status);
 750                 }
 751             }
 752             break;
 753
 754 #endif /* ACPI_NO_METHOD_EXECUTION */
 755
 756         default:
 757             /* All NAMED_COMPLEX opcodes must be handled above */
 758             break;
 759         }
 760         break;
 761
 762
 763     case AML_CLASS_INTERNAL:
 764
 765         /* case AML_INT_NAMEPATH_OP: */
 766         break;
 767
 768
 769     case AML_CLASS_METHOD_CALL:
 770
 771         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
 772             "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
 773             WalkState, Op, Node));
 774
 775         /*
 776          * Lookup the method name and save the Node
 777          */
 778         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
 779                         ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
 780                         ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
 781                         WalkState, &(NewNode));
 782         if (ACPI_SUCCESS (Status))
 783         {
 784             /*
 785              * Make sure that what we found is indeed a method
 786              * We didn't search for a method on purpose, to see if the name
 787              * would resolve
 788              */
 789             if (NewNode->Type != ACPI_TYPE_METHOD)
 790             {
 791                 Status = AE_AML_OPERAND_TYPE;
 792             }
 793
 794             /* We could put the returned object (Node) on the object stack for
 795              * later, but for now, we will put it in the "op" object that the
 796              * parser uses, so we can get it again at the end of this scope
 797              */
 798             Op->Common.Node = NewNode;
 799         }
 800         else
 801         {
 802             ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
 803         }
 804         break;
 805
 806
 807     default:
 808         break;
 809     }
 810
 811 Cleanup:
 812
 813     /* Remove the Node pushed at the very beginning */
 814
 815     WalkState->Operands[0] = NULL;
 816     WalkState->NumOperands = 0;
 817     return_ACPI_STATUS (Status);
 818 }
 819