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 /******************************************************************************
  *
  * Module Name: dswload - Dispatcher namespace load callbacks
  *
  *****************************************************************************/
 
 /******************************************************************************
  *
  * 1. Copyright Notice
  *
  * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp.
  * All rights reserved.
  *
  * 2. License
  *
  * 2.1. This is your license from Intel Corp. under its intellectual property
  * rights.  You may have additional license terms from the party that provided
  * you this software, covering your right to use that party's intellectual
  * property rights.
  *
  * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
  * copy of the source code appearing in this file ("Covered Code") an
  * irrevocable, perpetual, worldwide license under Intel's copyrights in the
  * base code distributed originally by Intel ("Original Intel Code") to copy,
  * make derivatives, distribute, use and display any portion of the Covered
  * Code in any form, with the right to sublicense such rights; and
  *
  * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
  * license (with the right to sublicense), under only those claims of Intel
  * patents that are infringed by the Original Intel Code, to make, use, sell,
  * offer to sell, and import the Covered Code and derivative works thereof
  * solely to the minimum extent necessary to exercise the above copyright
  * license, and in no event shall the patent license extend to any additions
  * to or modifications of the Original Intel Code.  No other license or right
  * is granted directly or by implication, estoppel or otherwise;
  *
  * The above copyright and patent license is granted only if the following
  * conditions are met:
  *
  * 3. Conditions
  *
  * 3.1. Redistribution of Source with Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification with rights to further distribute source must include
  * the above Copyright Notice, the above License, this list of Conditions,
  * and the following Disclaimer and Export Compliance provision.  In addition,
  * Licensee must cause all Covered Code to which Licensee contributes to
  * contain a file documenting the changes Licensee made to create that Covered
  * Code and the date of any change.  Licensee must include in that file the
  * documentation of any changes made by any predecessor Licensee.  Licensee
  * must include a prominent statement that the modification is derived,
  * directly or indirectly, from Original Intel Code.
  *
  * 3.2. Redistribution of Source with no Rights to Further Distribute Source.
  * Redistribution of source code of any substantial portion of the Covered
  * Code or modification without rights to further distribute source must
  * include the following Disclaimer and Export Compliance provision in the
  * documentation and/or other materials provided with distribution.  In
  * addition, Licensee may not authorize further sublicense of source of any
  * portion of the Covered Code, and must include terms to the effect that the
  * license from Licensee to its licensee is limited to the intellectual
  * property embodied in the software Licensee provides to its licensee, and
  * not to intellectual property embodied in modifications its licensee may
  * make.
  *
  * 3.3. Redistribution of Executable. Redistribution in executable form of any
  * substantial portion of the Covered Code or modification must reproduce the
  * above Copyright Notice, and the following Disclaimer and Export Compliance
  * provision in the documentation and/or other materials provided with the
  * distribution.
  *
  * 3.4. Intel retains all right, title, and interest in and to the Original
  * Intel Code.
  *
  * 3.5. Neither the name Intel nor any other trademark owned or controlled by
  * Intel shall be used in advertising or otherwise to promote the sale, use or
  * other dealings in products derived from or relating to the Covered Code
  * without prior written authorization from Intel.
  *
  * 4. Disclaimer and Export Compliance
  *
  * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
  * HERE.  ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
  * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT,  ASSISTANCE,
  * INSTALLATION, TRAINING OR OTHER SERVICES.  INTEL WILL NOT PROVIDE ANY
  * UPDATES, ENHANCEMENTS OR EXTENSIONS.  INTEL SPECIFICALLY DISCLAIMS ANY
  * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
  * PARTICULAR PURPOSE.
  *
  * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
  * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
  * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
  * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
  * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
  * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.  THESE LIMITATIONS
  * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
  * LIMITED REMEDY.
  *
  * 4.3. Licensee shall not export, either directly or indirectly, any of this
  * software or system incorporating such software without first obtaining any
  * required license or other approval from the U. S. Department of Commerce or
  * any other agency or department of the United States Government.  In the
  * event Licensee exports any such software from the United States or
  * re-exports any such software from a foreign destination, Licensee shall
  * ensure that the distribution and export/re-export of the software is in
  * compliance with all laws, regulations, orders, or other restrictions of the
  * U.S. Export Administration Regulations. Licensee agrees that neither it nor
  * any of its subsidiaries will export/re-export any technical data, process,
  * software, or service, directly or indirectly, to any country for which the
  * United States government or any agency thereof requires an export license,
  * other governmental approval, or letter of assurance, without first obtaining
  * such license, approval or letter.
  *
  *****************************************************************************/
 
 #define __DSWLOAD_C__
 
 #include "acpi.h"
 #include "accommon.h"
 #include "acparser.h"
 #include "amlcode.h"
 #include "acdispat.h"
 #include "acinterp.h"
 #include "acnamesp.h"
 #include "acevents.h"
 
 #ifdef ACPI_ASL_COMPILER
 #include "acdisasm.h"
 #endif
 
 #define _COMPONENT          ACPI_DISPATCHER
         ACPI_MODULE_NAME    ("dswload")
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsInitCallbacks
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *              PassNumber      - 1, 2, or 3
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Init walk state callbacks
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsInitCallbacks (
     ACPI_WALK_STATE         *WalkState,
     UINT32                  PassNumber)
 {
 
     switch (PassNumber)
     {
     case 1:
         WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
                                         ACPI_PARSE_DELETE_TREE;
         WalkState->DescendingCallback = AcpiDsLoad1BeginOp;
         WalkState->AscendingCallback  = AcpiDsLoad1EndOp;
         break;
 
     case 2:
         WalkState->ParseFlags         = ACPI_PARSE_LOAD_PASS1 |
                                         ACPI_PARSE_DELETE_TREE;
         WalkState->DescendingCallback = AcpiDsLoad2BeginOp;
         WalkState->AscendingCallback  = AcpiDsLoad2EndOp;
         break;
 
     case 3:
 #ifndef ACPI_NO_METHOD_EXECUTION
         WalkState->ParseFlags        |= ACPI_PARSE_EXECUTE  |
                                         ACPI_PARSE_DELETE_TREE;
         WalkState->DescendingCallback = AcpiDsExecBeginOp;
         WalkState->AscendingCallback  = AcpiDsExecEndOp;
 #endif
         break;
 
     default:
         return (AE_BAD_PARAMETER);
     }
 
     return (AE_OK);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsLoad1BeginOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *              OutOp           - Where to return op if a new one is created
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsLoad1BeginOp (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       **OutOp)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_STATUS             Status;
     ACPI_OBJECT_TYPE        ObjectType;
     char                    *Path;
     UINT32                  Flags;
 
 
     ACPI_FUNCTION_TRACE (DsLoad1BeginOp);
 
 
     Op = WalkState->Op;
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
 
     /* We are only interested in opcodes that have an associated name */
 
     if (Op)
     {
         if (!(WalkState->OpInfo->Flags & AML_NAMED))
         {
             *OutOp = Op;
             return_ACPI_STATUS (AE_OK);
         }
 
         /* Check if this object has already been installed in the namespace */
 
         if (Op->Common.Node)
         {
             *OutOp = Op;
             return_ACPI_STATUS (AE_OK);
         }
     }
 
     Path = AcpiPsGetNextNamestring (&WalkState->ParserState);
 
     /* Map the raw opcode into an internal object type */
 
     ObjectType = WalkState->OpInfo->ObjectType;
 
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
         "State=%p Op=%p [%s]\n", WalkState, Op, AcpiUtGetTypeName (ObjectType)));
 
     switch (WalkState->Opcode)
     {
     case AML_SCOPE_OP:
 
         /*
          * The target name of the Scope() operator must exist at this point so
          * that we can actually open the scope to enter new names underneath it.
          * Allow search-to-root for single namesegs.
          */
         Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
                         ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, &(Node));
 #ifdef ACPI_ASL_COMPILER
         if (Status == AE_NOT_FOUND)
         {
             /*
              * Table disassembly:
              * Target of Scope() not found. Generate an External for it, and
              * insert the name into the namespace.
              */
             AcpiDmAddToExternalList (Path, ACPI_TYPE_DEVICE, 0);
             Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
                        ACPI_IMODE_LOAD_PASS1, ACPI_NS_SEARCH_PARENT,
                        WalkState, &Node);
         }
 #endif
         if (ACPI_FAILURE (Status))
         {
             ACPI_ERROR_NAMESPACE (Path, Status);
             return_ACPI_STATUS (Status);
         }
 
         /*
          * Check to make sure that the target is
          * one of the opcodes that actually opens a scope
          */
         switch (Node->Type)
         {
         case ACPI_TYPE_ANY:
         case ACPI_TYPE_LOCAL_SCOPE:         /* Scope  */
         case ACPI_TYPE_DEVICE:
         case ACPI_TYPE_POWER:
         case ACPI_TYPE_PROCESSOR:
         case ACPI_TYPE_THERMAL:
 
             /* These are acceptable types */
             break;
 
         case ACPI_TYPE_INTEGER:
         case ACPI_TYPE_STRING:
         case ACPI_TYPE_BUFFER:
 
             /*
              * These types we will allow, but we will change the type. This
              * enables some existing code of the form:
              *
              *  Name (DEB, 0)
              *  Scope (DEB) { ... }
              *
              * Note: silently change the type here. On the second pass, we will report
              * a warning
              */
             ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)\n",
                 Path, AcpiUtGetTypeName (Node->Type)));
 
             Node->Type = ACPI_TYPE_ANY;
             WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
             break;
 
         default:
 
             /* All other types are an error */
 
             ACPI_ERROR ((AE_INFO,
                 "Invalid type (%s) for target of Scope operator [%4.4s] (Cannot override)",
                 AcpiUtGetTypeName (Node->Type), Path));
 
             return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
         }
         break;
 
 
     default:
         /*
          * For all other named opcodes, we will enter the name into
          * the namespace.
          *
          * Setup the search flags.
          * Since we are entering a name into the namespace, we do not want to
          * enable the search-to-root upsearch.
          *
          * There are only two conditions where it is acceptable that the name
          * already exists:
          *    1) the Scope() operator can reopen a scoping object that was
          *       previously defined (Scope, Method, Device, etc.)
          *    2) Whenever we are parsing a deferred opcode (OpRegion, Buffer,
          *       BufferField, or Package), the name of the object is already
          *       in the namespace.
          */
         if (WalkState->DeferredNode)
         {
             /* This name is already in the namespace, get the node */
 
             Node = WalkState->DeferredNode;
             Status = AE_OK;
             break;
         }
 
         /*
          * If we are executing a method, do not create any namespace objects
          * during the load phase, only during execution.
          */
         if (WalkState->MethodNode)
         {
             Node = NULL;
             Status = AE_OK;
             break;
         }
 
         Flags = ACPI_NS_NO_UPSEARCH;
         if ((WalkState->Opcode != AML_SCOPE_OP) &&
             (!(WalkState->ParseFlags & ACPI_PARSE_DEFERRED_OP)))
         {
             Flags |= ACPI_NS_ERROR_IF_FOUND;
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "[%s] Cannot already exist\n",
                     AcpiUtGetTypeName (ObjectType)));
         }
         else
         {
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "[%s] Both Find or Create allowed\n",
                     AcpiUtGetTypeName (ObjectType)));
         }
 
         /*
          * Enter the named type into the internal namespace. We enter the name
          * as we go downward in the parse tree. Any necessary subobjects that
          * involve arguments to the opcode must be created as we go back up the
          * parse tree later.
          */
         Status = AcpiNsLookup (WalkState->ScopeInfo, Path, ObjectType,
                         ACPI_IMODE_LOAD_PASS1, Flags, WalkState, &Node);
         if (ACPI_FAILURE (Status))
         {
             if (Status == AE_ALREADY_EXISTS)
             {
                 /* The name already exists in this scope */
 
                 if (Node->Flags & ANOBJ_IS_EXTERNAL)
                 {
                     /*
                      * Allow one create on an object or segment that was
                      * previously declared External
                      */
                     Node->Flags &= ~ANOBJ_IS_EXTERNAL;
                     Node->Type = (UINT8) ObjectType;
 
                     /* Just retyped a node, probably will need to open a scope */
 
                     if (AcpiNsOpensScope (ObjectType))
                     {
                         Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
                         if (ACPI_FAILURE (Status))
                         {
                             return_ACPI_STATUS (Status);
                         }
                     }
 
                     Status = AE_OK;
                 }
             }
 
             if (ACPI_FAILURE (Status))
             {
                 ACPI_ERROR_NAMESPACE (Path, Status);
                 return_ACPI_STATUS (Status);
             }
         }
         break;
     }
 
     /* Common exit */
 
     if (!Op)
     {
         /* Create a new op */
 
         Op = AcpiPsAllocOp (WalkState->Opcode);
         if (!Op)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
     }
 
     /* Initialize the op */
 
 #if (defined (ACPI_NO_METHOD_EXECUTION) || defined (ACPI_CONSTANT_EVAL_ONLY))
     Op->Named.Path = ACPI_CAST_PTR (UINT8, Path);
 #endif
 
     if (Node)
     {
         /*
          * Put the Node in the "op" object that the parser uses, so we
          * can get it again quickly when this scope is closed
          */
         Op->Common.Node = Node;
         Op->Named.Name = Node->Name.Integer;
     }
 
     AcpiPsAppendArg (AcpiPsGetParentScope (&WalkState->ParserState), Op);
     *OutOp = Op;
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsLoad1EndOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Ascending callback used during the loading of the namespace,
  *              both control methods and everything else.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsLoad1EndOp (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_OBJECT_TYPE        ObjectType;
     ACPI_STATUS             Status = AE_OK;
 
 
     ACPI_FUNCTION_TRACE (DsLoad1EndOp);
 
 
     Op = WalkState->Op;
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
 
     /* We are only interested in opcodes that have an associated name */
 
     if (!(WalkState->OpInfo->Flags & (AML_NAMED | AML_FIELD)))
     {
         return_ACPI_STATUS (AE_OK);
     }
 
     /* Get the object type to determine if we should pop the scope */
 
     ObjectType = WalkState->OpInfo->ObjectType;
 
 #ifndef ACPI_NO_METHOD_EXECUTION
     if (WalkState->OpInfo->Flags & AML_FIELD)
     {
         /*
          * If we are executing a method, do not create any namespace objects
          * during the load phase, only during execution.
          */
         if (!WalkState->MethodNode)
         {
             if (WalkState->Opcode == AML_FIELD_OP          ||
                 WalkState->Opcode == AML_BANK_FIELD_OP     ||
                 WalkState->Opcode == AML_INDEX_FIELD_OP)
             {
                 Status = AcpiDsInitFieldObjects (Op, WalkState);
             }
         }
         return_ACPI_STATUS (Status);
     }
 
     /*
      * If we are executing a method, do not create any namespace objects
      * during the load phase, only during execution.
      */
     if (!WalkState->MethodNode)
     {
         if (Op->Common.AmlOpcode == AML_REGION_OP)
         {
             Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
                         (ACPI_ADR_SPACE_TYPE) ((Op->Common.Value.Arg)->Common.Value.Integer),
                         WalkState);
             if (ACPI_FAILURE (Status))
             {
                 return_ACPI_STATUS (Status);
             }
         }
         else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP)
         {
             Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
                         REGION_DATA_TABLE, WalkState);
             if (ACPI_FAILURE (Status))
             {
                 return_ACPI_STATUS (Status);
             }
         }
     }
 #endif
 
     if (Op->Common.AmlOpcode == AML_NAME_OP)
     {
         /* For Name opcode, get the object type from the argument */
 
         if (Op->Common.Value.Arg)
         {
             ObjectType = (AcpiPsGetOpcodeInfo (
                 (Op->Common.Value.Arg)->Common.AmlOpcode))->ObjectType;
 
             /* Set node type if we have a namespace node */
 
             if (Op->Common.Node)
             {
                 Op->Common.Node->Type = (UINT8) ObjectType;
             }
         }
     }
 
     /*
      * If we are executing a method, do not create any namespace objects
      * during the load phase, only during execution.
      */
     if (!WalkState->MethodNode)
     {
         if (Op->Common.AmlOpcode == AML_METHOD_OP)
         {
             /*
              * MethodOp PkgLength NameString MethodFlags TermList
              *
              * Note: We must create the method node/object pair as soon as we
              * see the method declaration. This allows later pass1 parsing
              * of invocations of the method (need to know the number of
              * arguments.)
              */
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
                 WalkState, Op, Op->Named.Node));
 
             if (!AcpiNsGetAttachedObject (Op->Named.Node))
             {
                 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
                 WalkState->NumOperands = 1;
 
                 Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
                 if (ACPI_SUCCESS (Status))
                 {
                     Status = AcpiExCreateMethod (Op->Named.Data,
                                         Op->Named.Length, WalkState);
                 }
 
                 WalkState->Operands[0] = NULL;
                 WalkState->NumOperands = 0;
 
                 if (ACPI_FAILURE (Status))
                 {
                     return_ACPI_STATUS (Status);
                 }
             }
         }
     }
 
     /* Pop the scope stack (only if loading a table) */
 
     if (!WalkState->MethodNode &&
         AcpiNsOpensScope (ObjectType))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s): Popping scope for Op %p\n",
             AcpiUtGetTypeName (ObjectType), Op));
 
         Status = AcpiDsScopeStackPop (WalkState);
     }
 
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsLoad2BeginOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *              OutOp           - Wher to return op if a new one is created
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Descending callback used during the loading of ACPI tables.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsLoad2BeginOp (
     ACPI_WALK_STATE         *WalkState,
     ACPI_PARSE_OBJECT       **OutOp)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_STATUS             Status;
     ACPI_OBJECT_TYPE        ObjectType;
     char                    *BufferPtr;
     UINT32                  Flags;
 
 
     ACPI_FUNCTION_TRACE (DsLoad2BeginOp);
 
 
     Op = WalkState->Op;
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Op=%p State=%p\n", Op, WalkState));
 
     if (Op)
     {
         if ((WalkState->ControlState) &&
             (WalkState->ControlState->Common.State ==
                 ACPI_CONTROL_CONDITIONAL_EXECUTING))
         {
             /* We are executing a while loop outside of a method */
 
             Status = AcpiDsExecBeginOp (WalkState, OutOp);
             return_ACPI_STATUS (Status);
         }
 
         /* We only care about Namespace opcodes here */
 
         if ((!(WalkState->OpInfo->Flags & AML_NSOPCODE)   &&
               (WalkState->Opcode != AML_INT_NAMEPATH_OP)) ||
             (!(WalkState->OpInfo->Flags & AML_NAMED)))
         {
 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
             if ((WalkState->OpInfo->Class == AML_CLASS_EXECUTE) ||
                 (WalkState->OpInfo->Class == AML_CLASS_CONTROL))
             {
                 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                     "Begin/EXEC: %s (fl %8.8X)\n", WalkState->OpInfo->Name,
                     WalkState->OpInfo->Flags));
 
                 /* Executing a type1 or type2 opcode outside of a method */
 
                 Status = AcpiDsExecBeginOp (WalkState, OutOp);
                 return_ACPI_STATUS (Status);
             }
 #endif
             return_ACPI_STATUS (AE_OK);
         }
 
         /* Get the name we are going to enter or lookup in the namespace */
 
         if (WalkState->Opcode == AML_INT_NAMEPATH_OP)
         {
             /* For Namepath op, get the path string */
 
             BufferPtr = Op->Common.Value.String;
             if (!BufferPtr)
             {
                 /* No name, just exit */
 
                 return_ACPI_STATUS (AE_OK);
             }
         }
         else
         {
             /* Get name from the op */
 
             BufferPtr = ACPI_CAST_PTR (char, &Op->Named.Name);
         }
     }
     else
     {
         /* Get the namestring from the raw AML */
 
         BufferPtr = AcpiPsGetNextNamestring (&WalkState->ParserState);
     }
 
     /* Map the opcode into an internal object type */
 
     ObjectType = WalkState->OpInfo->ObjectType;
 
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
         "State=%p Op=%p Type=%X\n", WalkState, Op, ObjectType));
 
     switch (WalkState->Opcode)
     {
     case AML_FIELD_OP:
     case AML_BANK_FIELD_OP:
     case AML_INDEX_FIELD_OP:
 
         Node = NULL;
         Status = AE_OK;
         break;
 
     case AML_INT_NAMEPATH_OP:
         /*
          * The NamePath is an object reference to an existing object.
          * Don't enter the name into the namespace, but look it up
          * for use later.
          */
         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
                         ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
                         WalkState, &(Node));
         break;
 
     case AML_SCOPE_OP:
         /*
          * The Path is an object reference to an existing object.
          * Don't enter the name into the namespace, but look it up
          * for use later.
          */
         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
                         ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT,
                         WalkState, &(Node));
         if (ACPI_FAILURE (Status))
         {
 #ifdef ACPI_ASL_COMPILER
             if (Status == AE_NOT_FOUND)
             {
                 Status = AE_OK;
             }
             else
             {
                 ACPI_ERROR_NAMESPACE (BufferPtr, Status);
             }
 #else
             ACPI_ERROR_NAMESPACE (BufferPtr, Status);
 #endif
             return_ACPI_STATUS (Status);
         }
 
         /*
          * We must check to make sure that the target is
          * one of the opcodes that actually opens a scope
          */
         switch (Node->Type)
         {
         case ACPI_TYPE_ANY:
         case ACPI_TYPE_LOCAL_SCOPE:         /* Scope */
         case ACPI_TYPE_DEVICE:
         case ACPI_TYPE_POWER:
         case ACPI_TYPE_PROCESSOR:
         case ACPI_TYPE_THERMAL:
 
             /* These are acceptable types */
             break;
 
         case ACPI_TYPE_INTEGER:
         case ACPI_TYPE_STRING:
         case ACPI_TYPE_BUFFER:
 
             /*
              * These types we will allow, but we will change the type. This
              * enables some existing code of the form:
              *
              *  Name (DEB, 0)
              *  Scope (DEB) { ... }
              */
             ACPI_WARNING ((AE_INFO,
                 "Type override - [%4.4s] had invalid type (%s) for Scope operator, changed to (Scope)",
                 BufferPtr, AcpiUtGetTypeName (Node->Type)));
 
             Node->Type = ACPI_TYPE_ANY;
             WalkState->ScopeInfo->Common.Value = ACPI_TYPE_ANY;
             break;
 
         default:
 
             /* All other types are an error */
 
             ACPI_ERROR ((AE_INFO,
                 "Invalid type (%s) for target of Scope operator [%4.4s]",
                 AcpiUtGetTypeName (Node->Type), BufferPtr));
 
             return (AE_AML_OPERAND_TYPE);
         }
         break;
 
     default:
 
         /* All other opcodes */
 
         if (Op && Op->Common.Node)
         {
             /* This op/node was previously entered into the namespace */
 
             Node = Op->Common.Node;
 
             if (AcpiNsOpensScope (ObjectType))
             {
                 Status = AcpiDsScopeStackPush (Node, ObjectType, WalkState);
                 if (ACPI_FAILURE (Status))
                 {
                     return_ACPI_STATUS (Status);
                 }
             }
 
             return_ACPI_STATUS (AE_OK);
         }
 
         /*
          * Enter the named type into the internal namespace. We enter the name
          * as we go downward in the parse tree. Any necessary subobjects that
          * involve arguments to the opcode must be created as we go back up the
          * parse tree later.
          *
          * Note: Name may already exist if we are executing a deferred opcode.
          */
         if (WalkState->DeferredNode)
         {
             /* This name is already in the namespace, get the node */
 
             Node = WalkState->DeferredNode;
             Status = AE_OK;
             break;
         }
 
         Flags = ACPI_NS_NO_UPSEARCH;
         if (WalkState->PassNumber == ACPI_IMODE_EXECUTE)
         {
             /* Execution mode, node cannot already exist, node is temporary */
 
             Flags |= (ACPI_NS_ERROR_IF_FOUND | ACPI_NS_TEMPORARY);
         }
 
         /* Add new entry or lookup existing entry */
 
         Status = AcpiNsLookup (WalkState->ScopeInfo, BufferPtr, ObjectType,
                     ACPI_IMODE_LOAD_PASS2, Flags, WalkState, &Node);
 
         if (ACPI_SUCCESS (Status) && (Flags & ACPI_NS_TEMPORARY))
         {
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "***New Node [%4.4s] %p is temporary\n",
                 AcpiUtGetNodeName (Node), Node));
         }
         break;
     }
 
     if (ACPI_FAILURE (Status))
     {
         ACPI_ERROR_NAMESPACE (BufferPtr, Status);
         return_ACPI_STATUS (Status);
     }
 
     if (!Op)
     {
         /* Create a new op */
 
         Op = AcpiPsAllocOp (WalkState->Opcode);
         if (!Op)
         {
             return_ACPI_STATUS (AE_NO_MEMORY);
         }
 
         /* Initialize the new op */
 
         if (Node)
         {
             Op->Named.Name = Node->Name.Integer;
         }
         *OutOp = Op;
     }
 
     /*
      * Put the Node in the "op" object that the parser uses, so we
      * can get it again quickly when this scope is closed
      */
     Op->Common.Node = Node;
     return_ACPI_STATUS (Status);
 }
 
 
 /*******************************************************************************
  *
  * FUNCTION:    AcpiDsLoad2EndOp
  *
  * PARAMETERS:  WalkState       - Current state of the parse tree walk
  *
  * RETURN:      Status
  *
  * DESCRIPTION: Ascending callback used during the loading of the namespace,
  *              both control methods and everything else.
  *
  ******************************************************************************/
 
 ACPI_STATUS
 AcpiDsLoad2EndOp (
     ACPI_WALK_STATE         *WalkState)
 {
     ACPI_PARSE_OBJECT       *Op;
     ACPI_STATUS             Status = AE_OK;
     ACPI_OBJECT_TYPE        ObjectType;
     ACPI_NAMESPACE_NODE     *Node;
     ACPI_PARSE_OBJECT       *Arg;
     ACPI_NAMESPACE_NODE     *NewNode;
 #ifndef ACPI_NO_METHOD_EXECUTION
     UINT32                  i;
     UINT8                   RegionSpace;
 #endif
 
 
     ACPI_FUNCTION_TRACE (DsLoad2EndOp);
 
     Op = WalkState->Op;
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Opcode [%s] Op %p State %p\n",
             WalkState->OpInfo->Name, Op, WalkState));
 
     /* Check if opcode had an associated namespace object */
 
     if (!(WalkState->OpInfo->Flags & AML_NSOBJECT))
     {
 #ifndef ACPI_NO_METHOD_EXECUTION
 #ifdef ACPI_ENABLE_MODULE_LEVEL_CODE
         /* No namespace object. Executable opcode? */
 
         if ((WalkState->OpInfo->Class == AML_CLASS_EXECUTE) ||
             (WalkState->OpInfo->Class == AML_CLASS_CONTROL))
         {
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "End/EXEC:   %s (fl %8.8X)\n", WalkState->OpInfo->Name,
                 WalkState->OpInfo->Flags));
 
             /* Executing a type1 or type2 opcode outside of a method */
 
             Status = AcpiDsExecEndOp (WalkState);
             return_ACPI_STATUS (Status);
         }
 #endif
 #endif
         return_ACPI_STATUS (AE_OK);
     }
 
     if (Op->Common.AmlOpcode == AML_SCOPE_OP)
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
             "Ending scope Op=%p State=%p\n", Op, WalkState));
     }
 
     ObjectType = WalkState->OpInfo->ObjectType;
 
     /*
      * Get the Node/name from the earlier lookup
      * (It was saved in the *op structure)
      */
     Node = Op->Common.Node;
 
     /*
      * Put the Node on the object stack (Contains the ACPI Name of
      * this object)
      */
     WalkState->Operands[0] = (void *) Node;
     WalkState->NumOperands = 1;
 
     /* Pop the scope stack */
 
     if (AcpiNsOpensScope (ObjectType) &&
        (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP))
     {
         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "(%s) Popping scope for Op %p\n",
             AcpiUtGetTypeName (ObjectType), Op));
 
         Status = AcpiDsScopeStackPop (WalkState);
         if (ACPI_FAILURE (Status))
         {
             goto Cleanup;
         }
     }
 
     /*
      * Named operations are as follows:
      *
      * AML_ALIAS
      * AML_BANKFIELD
      * AML_CREATEBITFIELD
      * AML_CREATEBYTEFIELD
      * AML_CREATEDWORDFIELD
      * AML_CREATEFIELD
      * AML_CREATEQWORDFIELD
      * AML_CREATEWORDFIELD
      * AML_DATA_REGION
      * AML_DEVICE
      * AML_EVENT
      * AML_FIELD
      * AML_INDEXFIELD
      * AML_METHOD
      * AML_METHODCALL
      * AML_MUTEX
      * AML_NAME
      * AML_NAMEDFIELD
      * AML_OPREGION
      * AML_POWERRES
      * AML_PROCESSOR
      * AML_SCOPE
      * AML_THERMALZONE
      */
 
     ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
         "Create-Load [%s] State=%p Op=%p NamedObj=%p\n",
         AcpiPsGetOpcodeName (Op->Common.AmlOpcode), WalkState, Op, Node));
 
     /* Decode the opcode */
 
     Arg = Op->Common.Value.Arg;
 
     switch (WalkState->OpInfo->Type)
     {
 #ifndef ACPI_NO_METHOD_EXECUTION
 
     case AML_TYPE_CREATE_FIELD:
         /*
          * Create the field object, but the field buffer and index must
          * be evaluated later during the execution phase
          */
         Status = AcpiDsCreateBufferField (Op, WalkState);
         break;
 
 
      case AML_TYPE_NAMED_FIELD:
         /*
          * If we are executing a method, initialize the field
          */
         if (WalkState->MethodNode)
         {
             Status = AcpiDsInitFieldObjects (Op, WalkState);
         }
 
         switch (Op->Common.AmlOpcode)
         {
         case AML_INDEX_FIELD_OP:
 
             Status = AcpiDsCreateIndexField (Op, (ACPI_HANDLE) Arg->Common.Node,
                         WalkState);
             break;
 
         case AML_BANK_FIELD_OP:
 
             Status = AcpiDsCreateBankField (Op, Arg->Common.Node, WalkState);
             break;
 
         case AML_FIELD_OP:
 
             Status = AcpiDsCreateField (Op, Arg->Common.Node, WalkState);
             break;
 
         default:
             /* All NAMED_FIELD opcodes must be handled above */
             break;
         }
         break;
 
 
      case AML_TYPE_NAMED_SIMPLE:
 
         Status = AcpiDsCreateOperands (WalkState, Arg);
         if (ACPI_FAILURE (Status))
         {
             goto Cleanup;
         }
 
         switch (Op->Common.AmlOpcode)
         {
         case AML_PROCESSOR_OP:
 
             Status = AcpiExCreateProcessor (WalkState);
             break;
 
         case AML_POWER_RES_OP:
 
             Status = AcpiExCreatePowerResource (WalkState);
             break;
 
         case AML_MUTEX_OP:
 
             Status = AcpiExCreateMutex (WalkState);
             break;
 
         case AML_EVENT_OP:
 
             Status = AcpiExCreateEvent (WalkState);
             break;
 
 
         case AML_ALIAS_OP:
 
             Status = AcpiExCreateAlias (WalkState);
             break;
 
         default:
             /* Unknown opcode */
 
             Status = AE_OK;
             goto Cleanup;
         }
 
         /* Delete operands */
 
         for (i = 1; i < WalkState->NumOperands; i++)
         {
             AcpiUtRemoveReference (WalkState->Operands[i]);
             WalkState->Operands[i] = NULL;
         }
 
         break;
 #endif /* ACPI_NO_METHOD_EXECUTION */
 
     case AML_TYPE_NAMED_COMPLEX:
 
         switch (Op->Common.AmlOpcode)
         {
 #ifndef ACPI_NO_METHOD_EXECUTION
         case AML_REGION_OP:
         case AML_DATA_REGION_OP:
 
             if (Op->Common.AmlOpcode == AML_REGION_OP)
             {
                 RegionSpace = (ACPI_ADR_SPACE_TYPE)
                       ((Op->Common.Value.Arg)->Common.Value.Integer);
             }
             else
             {
                 RegionSpace = REGION_DATA_TABLE;
             }
 
             /*
              * If we are executing a method, initialize the region
              */
             if (WalkState->MethodNode)
             {
                 Status = AcpiExCreateRegion (Op->Named.Data, Op->Named.Length,
                             RegionSpace, WalkState);
                 if (ACPI_FAILURE (Status))
                 {
                     return (Status);
                 }
             }
 
             /*
              * The OpRegion is not fully parsed at this time. Only valid
              * argument is the SpaceId. (We must save the address of the
              * AML of the address and length operands)
              */
 
             /*
              * If we have a valid region, initialize it
              * Namespace is NOT locked at this point.
              *
              * TBD: need to unlock interpreter if it is locked, in order
              * to allow _REG methods to be run.
              */
             Status = AcpiEvInitializeRegion (AcpiNsGetAttachedObject (Node),
                         FALSE);
             if (ACPI_FAILURE (Status))
             {
                 /*
                  *  If AE_NOT_EXIST is returned, it is not fatal
                  *  because many regions get created before a handler
                  *  is installed for said region.
                  */
                 if (AE_NOT_EXIST == Status)
                 {
                     Status = AE_OK;
                 }
             }
             break;
 
 
         case AML_NAME_OP:
 
             Status = AcpiDsCreateNode (WalkState, Node, Op);
             break;
 
 
         case AML_METHOD_OP:
             /*
              * MethodOp PkgLength NameString MethodFlags TermList
              *
              * Note: We must create the method node/object pair as soon as we
              * see the method declaration. This allows later pass1 parsing
              * of invocations of the method (need to know the number of
              * arguments.)
              */
             ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
                 "LOADING-Method: State=%p Op=%p NamedObj=%p\n",
                 WalkState, Op, Op->Named.Node));
 
             if (!AcpiNsGetAttachedObject (Op->Named.Node))
             {
                 WalkState->Operands[0] = ACPI_CAST_PTR (void, Op->Named.Node);
                 WalkState->NumOperands = 1;
 
                 Status = AcpiDsCreateOperands (WalkState, Op->Common.Value.Arg);
                 if (ACPI_SUCCESS (Status))
                 {
                     Status = AcpiExCreateMethod (Op->Named.Data,
                                         Op->Named.Length, WalkState);
                 }
                 WalkState->Operands[0] = NULL;
                 WalkState->NumOperands = 0;
 
                 if (ACPI_FAILURE (Status))
                 {
                     return_ACPI_STATUS (Status);
                 }
             }
             break;
 
 #endif /* ACPI_NO_METHOD_EXECUTION */
 
         default:
             /* All NAMED_COMPLEX opcodes must be handled above */
             break;
         }
         break;
 
 
     case AML_CLASS_INTERNAL:
 
         /* case AML_INT_NAMEPATH_OP: */
         break;
 
 
     case AML_CLASS_METHOD_CALL:
 
         ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH,
             "RESOLVING-MethodCall: State=%p Op=%p NamedObj=%p\n",
             WalkState, Op, Node));
 
         /*
          * Lookup the method name and save the Node
          */
         Status = AcpiNsLookup (WalkState->ScopeInfo, Arg->Common.Value.String,
                         ACPI_TYPE_ANY, ACPI_IMODE_LOAD_PASS2,
                         ACPI_NS_SEARCH_PARENT | ACPI_NS_DONT_OPEN_SCOPE,
                         WalkState, &(NewNode));
         if (ACPI_SUCCESS (Status))
         {
             /*
              * Make sure that what we found is indeed a method
              * We didn't search for a method on purpose, to see if the name
              * would resolve
              */
             if (NewNode->Type != ACPI_TYPE_METHOD)
             {
                 Status = AE_AML_OPERAND_TYPE;
             }
 
             /* We could put the returned object (Node) on the object stack for
              * later, but for now, we will put it in the "op" object that the
              * parser uses, so we can get it again at the end of this scope
              */
             Op->Common.Node = NewNode;
         }
         else
         {
             ACPI_ERROR_NAMESPACE (Arg->Common.Value.String, Status);
         }
         break;
 
 
     default:
         break;
     }
 
 Cleanup:
 
     /* Remove the Node pushed at the very beginning */
 
     WalkState->Operands[0] = NULL;
     WalkState->NumOperands = 0;
     return_ACPI_STATUS (Status);
 }