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/*******************************************************************************

 *

 * Module Name: nsaccess - Top-level functions for accessing ACPI namespace

 *

 ******************************************************************************/

/******************************************************************************

 *

 * 1. Copyright Notice

 *

 * Some or all of this work - Copyright (c) 1999 - 2011, 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 __NSACCESS_C__

#include "acpi.h"

#include "accommon.h"

#include "amlcode.h"

#include "acnamesp.h"

#include "acdispat.h"

#define _COMPONENT          ACPI_NAMESPACE

        ACPI_MODULE_NAME    ("nsaccess")

/*******************************************************************************

 *

 * FUNCTION:    AcpiNsRootInitialize

 *

 * PARAMETERS:  None

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Allocate and initialize the default root named objects

 *

 * MUTEX:       Locks namespace for entire execution

 *

 ******************************************************************************/

ACPI_STATUS

AcpiNsRootInitialize (

    void)

{

    ACPI_STATUS                 Status;

    const ACPI_PREDEFINED_NAMES *InitVal = NULL;

    ACPI_NAMESPACE_NODE         *NewNode;

    ACPI_OPERAND_OBJECT         *ObjDesc;

    ACPI_STRING                 Val = NULL;

    ACPI_FUNCTION_TRACE (NsRootInitialize);

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /*

     * The global root ptr is initially NULL, so a non-NULL value indicates

     * that AcpiNsRootInitialize() has already been called; just return.

     */

    if (AcpiGbl_RootNode)

    {

        Status = AE_OK;

        goto UnlockAndExit;

    }

    /*

     * Tell the rest of the subsystem that the root is initialized

     * (This is OK because the namespace is locked)

     */

    AcpiGbl_RootNode = &AcpiGbl_RootNodeStruct;

    /* Enter the pre-defined names in the name table */

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO,

        "Entering predefined entries into namespace\n"));

    for (InitVal = AcpiGbl_PreDefinedNames; InitVal->Name; InitVal++)

    {

        /* _OSI is optional for now, will be permanent later */

        if (!ACPI_STRCMP (InitVal->Name, "_OSI") && !AcpiGbl_CreateOsiMethod)

        {

            continue;

        }

        Status = AcpiNsLookup (NULL, InitVal->Name, InitVal->Type,

                        ACPI_IMODE_LOAD_PASS2, ACPI_NS_NO_UPSEARCH,

                        NULL, &NewNode);

        if (ACPI_FAILURE (Status) || (!NewNode)) /* Must be on same line for code converter */

        {

            ACPI_EXCEPTION ((AE_INFO, Status,

                "Could not create predefined name %s",

                InitVal->Name));

        }

        /*

         * Name entered successfully. If entry in PreDefinedNames[] specifies

         * an initial value, create the initial value.

         */

        if (InitVal->Val)

        {

            Status = AcpiOsPredefinedOverride (InitVal, &Val);

            if (ACPI_FAILURE (Status))

            {

                ACPI_ERROR ((AE_INFO,

                    "Could not override predefined %s",

                    InitVal->Name));

            }

            if (!Val)

            {

                Val = InitVal->Val;

            }

            /*

             * Entry requests an initial value, allocate a

             * descriptor for it.

             */

            ObjDesc = AcpiUtCreateInternalObject (InitVal->Type);

            if (!ObjDesc)

            {

                Status = AE_NO_MEMORY;

                goto UnlockAndExit;

            }

            /*

             * Convert value string from table entry to

             * internal representation. Only types actually

             * used for initial values are implemented here.

             */

            switch (InitVal->Type)

            {

            case ACPI_TYPE_METHOD:

                ObjDesc->Method.ParamCount = (UINT8) ACPI_TO_INTEGER (Val);

                ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;

#if defined (ACPI_ASL_COMPILER)

                /* Save the parameter count for the iASL compiler */

                NewNode->Value = ObjDesc->Method.ParamCount;

#else

                /* Mark this as a very SPECIAL method */

                ObjDesc->Method.InfoFlags = ACPI_METHOD_INTERNAL_ONLY;

                ObjDesc->Method.Dispatch.Implementation = AcpiUtOsiImplementation;

#endif

                break;

            case ACPI_TYPE_INTEGER:

                ObjDesc->Integer.Value = ACPI_TO_INTEGER (Val);

                break;

            case ACPI_TYPE_STRING:

                /* Build an object around the static string */

                ObjDesc->String.Length = (UINT32) ACPI_STRLEN (Val);

                ObjDesc->String.Pointer = Val;

                ObjDesc->Common.Flags |= AOPOBJ_STATIC_POINTER;

                break;

            case ACPI_TYPE_MUTEX:

                ObjDesc->Mutex.Node = NewNode;

                ObjDesc->Mutex.SyncLevel = (UINT8) (ACPI_TO_INTEGER (Val) - 1);

                /* Create a mutex */

                Status = AcpiOsCreateMutex (&ObjDesc->Mutex.OsMutex);

                if (ACPI_FAILURE (Status))

                {

                    AcpiUtRemoveReference (ObjDesc);

                    goto UnlockAndExit;

                }

                /* Special case for ACPI Global Lock */

                if (ACPI_STRCMP (InitVal->Name, "_GL_") == 0)

                {

                    AcpiGbl_GlobalLockMutex = ObjDesc;

                    /* Create additional counting semaphore for global lock */

                    Status = AcpiOsCreateSemaphore (

                                1, 0, &AcpiGbl_GlobalLockSemaphore);

                    if (ACPI_FAILURE (Status))

                    {

                        AcpiUtRemoveReference (ObjDesc);

                        goto UnlockAndExit;

                    }

                }

                break;

            default:

                ACPI_ERROR ((AE_INFO, "Unsupported initial type value 0x%X",

                    InitVal->Type));

                AcpiUtRemoveReference (ObjDesc);

                ObjDesc = NULL;

                continue;

            }

            /* Store pointer to value descriptor in the Node */

            Status = AcpiNsAttachObject (NewNode, ObjDesc,

                        ObjDesc->Common.Type);

            /* Remove local reference to the object */

            AcpiUtRemoveReference (ObjDesc);

        }

    }

UnlockAndExit:

    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);

    /* Save a handle to "_GPE", it is always present */

    if (ACPI_SUCCESS (Status))

    {

        Status = AcpiNsGetNode (NULL, "\\_GPE", ACPI_NS_NO_UPSEARCH,

                    &AcpiGbl_FadtGpeDevice);

    }

    return_ACPI_STATUS (Status);

}

/*******************************************************************************

 *

 * FUNCTION:    AcpiNsLookup

 *

 * PARAMETERS:  ScopeInfo       - Current scope info block

 *              Pathname        - Search pathname, in internal format

 *                                (as represented in the AML stream)

 *              Type            - Type associated with name

 *              InterpreterMode - IMODE_LOAD_PASS2 => add name if not found

 *              Flags           - Flags describing the search restrictions

 *              WalkState       - Current state of the walk

 *              ReturnNode      - Where the Node is placed (if found

 *                                or created successfully)

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Find or enter the passed name in the name space.

 *              Log an error if name not found in Exec mode.

 *

 * MUTEX:       Assumes namespace is locked.

 *

 ******************************************************************************/

ACPI_STATUS

AcpiNsLookup (

    ACPI_GENERIC_STATE      *ScopeInfo,

    char                    *Pathname,

    ACPI_OBJECT_TYPE        Type,

    ACPI_INTERPRETER_MODE   InterpreterMode,

    UINT32                  Flags,

    ACPI_WALK_STATE         *WalkState,

    ACPI_NAMESPACE_NODE     **ReturnNode)

{

    ACPI_STATUS             Status;

    char                    *Path = Pathname;

    ACPI_NAMESPACE_NODE     *PrefixNode;

    ACPI_NAMESPACE_NODE     *CurrentNode = NULL;

    ACPI_NAMESPACE_NODE     *ThisNode = NULL;

    UINT32                  NumSegments;

    UINT32                  NumCarats;

    ACPI_NAME               SimpleName;

    ACPI_OBJECT_TYPE        TypeToCheckFor;

    ACPI_OBJECT_TYPE        ThisSearchType;

    UINT32                  SearchParentFlag = ACPI_NS_SEARCH_PARENT;

    UINT32                  LocalFlags;

    ACPI_FUNCTION_TRACE (NsLookup);

    if (!ReturnNode)

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    LocalFlags = Flags & ~(ACPI_NS_ERROR_IF_FOUND | ACPI_NS_SEARCH_PARENT);

    *ReturnNode = ACPI_ENTRY_NOT_FOUND;

    AcpiGbl_NsLookupCount++;

    if (!AcpiGbl_RootNode)

    {

        return_ACPI_STATUS (AE_NO_NAMESPACE);

    }

    /* Get the prefix scope. A null scope means use the root scope */

    if ((!ScopeInfo) ||

        (!ScopeInfo->Scope.Node))

    {

        ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

            "Null scope prefix, using root node (%p)\n",

            AcpiGbl_RootNode));

        PrefixNode = AcpiGbl_RootNode;

    }

    else

    {

        PrefixNode = ScopeInfo->Scope.Node;

        if (ACPI_GET_DESCRIPTOR_TYPE (PrefixNode) != ACPI_DESC_TYPE_NAMED)

        {

            ACPI_ERROR ((AE_INFO, "%p is not a namespace node [%s]",

                PrefixNode, AcpiUtGetDescriptorName (PrefixNode)));

            return_ACPI_STATUS (AE_AML_INTERNAL);

        }

        if (!(Flags & ACPI_NS_PREFIX_IS_SCOPE))

        {

            /*

             * This node might not be a actual "scope" node (such as a

             * Device/Method, etc.)  It could be a Package or other object

             * node. Backup up the tree to find the containing scope node.

             */

            while (!AcpiNsOpensScope (PrefixNode->Type) &&

                    PrefixNode->Type != ACPI_TYPE_ANY)

            {

                PrefixNode = PrefixNode->Parent;

            }

        }

    }

    /* Save type. TBD: may be no longer necessary */

    TypeToCheckFor = Type;

    /*

     * Begin examination of the actual pathname

     */

    if (!Pathname)

    {

        /* A Null NamePath is allowed and refers to the root */

        NumSegments = 0;

        ThisNode = AcpiGbl_RootNode;

        Path = "";

        ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

            "Null Pathname (Zero segments), Flags=%X\n", Flags));

    }

    else

    {

        /*

         * Name pointer is valid (and must be in internal name format)

         *

         * Check for scope prefixes:

         *

         * As represented in the AML stream, a namepath consists of an

         * optional scope prefix followed by a name segment part.

         *

         * If present, the scope prefix is either a Root Prefix (in

         * which case the name is fully qualified), or one or more

         * Parent Prefixes (in which case the name's scope is relative

         * to the current scope).

         */

        if (*Path == (UINT8) AML_ROOT_PREFIX)

        {

            /* Pathname is fully qualified, start from the root */

            ThisNode = AcpiGbl_RootNode;

            SearchParentFlag = ACPI_NS_NO_UPSEARCH;

            /* Point to name segment part */

            Path++;

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Path is absolute from root [%p]\n", ThisNode));

        }

        else

        {

            /* Pathname is relative to current scope, start there */

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Searching relative to prefix scope [%4.4s] (%p)\n",

                AcpiUtGetNodeName (PrefixNode), PrefixNode));

            /*

             * Handle multiple Parent Prefixes (carat) by just getting

             * the parent node for each prefix instance.

             */

            ThisNode = PrefixNode;

            NumCarats = 0;

            while (*Path == (UINT8) AML_PARENT_PREFIX)

            {

                /* Name is fully qualified, no search rules apply */

                SearchParentFlag = ACPI_NS_NO_UPSEARCH;

                /*

                 * Point past this prefix to the name segment

                 * part or the next Parent Prefix

                 */

                Path++;

                /* Backup to the parent node */

                NumCarats++;

                ThisNode = ThisNode->Parent;

                if (!ThisNode)

                {

                    /* Current scope has no parent scope */

                    ACPI_ERROR ((AE_INFO,

                        "ACPI path has too many parent prefixes (^) "

                        "- reached beyond root node"));

                    return_ACPI_STATUS (AE_NOT_FOUND);

                }

            }

            if (SearchParentFlag == ACPI_NS_NO_UPSEARCH)

            {

                ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                    "Search scope is [%4.4s], path has %u carat(s)\n",

                    AcpiUtGetNodeName (ThisNode), NumCarats));

            }

        }

        /*

         * Determine the number of ACPI name segments in this pathname.

         *

         * The segment part consists of either:

         *  - A Null name segment (0)

         *  - A DualNamePrefix followed by two 4-byte name segments

         *  - A MultiNamePrefix followed by a byte indicating the

         *      number of segments and the segments themselves.

         *  - A single 4-byte name segment

         *

         * Examine the name prefix opcode, if any, to determine the number of

         * segments.

         */

        switch (*Path)

        {

        case 0:

            /*

             * Null name after a root or parent prefixes. We already

             * have the correct target node and there are no name segments.

             */

            NumSegments  = 0;

            Type = ThisNode->Type;

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Prefix-only Pathname (Zero name segments), Flags=%X\n",

                Flags));

            break;

        case AML_DUAL_NAME_PREFIX:

            /* More than one NameSeg, search rules do not apply */

            SearchParentFlag = ACPI_NS_NO_UPSEARCH;

            /* Two segments, point to first name segment */

            NumSegments = 2;

            Path++;

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Dual Pathname (2 segments, Flags=%X)\n", Flags));

            break;

        case AML_MULTI_NAME_PREFIX_OP:

            /* More than one NameSeg, search rules do not apply */

            SearchParentFlag = ACPI_NS_NO_UPSEARCH;

            /* Extract segment count, point to first name segment */

            Path++;

            NumSegments = (UINT32) (UINT8) *Path;

            Path++;

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Multi Pathname (%u Segments, Flags=%X)\n",

                NumSegments, Flags));

            break;

        default:

            /*

             * Not a Null name, no Dual or Multi prefix, hence there is

             * only one name segment and Pathname is already pointing to it.

             */

            NumSegments = 1;

            ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                "Simple Pathname (1 segment, Flags=%X)\n", Flags));

            break;

        }

        ACPI_DEBUG_EXEC (AcpiNsPrintPathname (NumSegments, Path));

    }

    /*

     * Search namespace for each segment of the name. Loop through and

     * verify (or add to the namespace) each name segment.

     *

     * The object type is significant only at the last name

     * segment. (We don't care about the types along the path, only

     * the type of the final target object.)

     */

    ThisSearchType = ACPI_TYPE_ANY;

    CurrentNode = ThisNode;

    while (NumSegments && CurrentNode)

    {

        NumSegments--;

        if (!NumSegments)

        {

            /* This is the last segment, enable typechecking */

            ThisSearchType = Type;

            /*

             * Only allow automatic parent search (search rules) if the caller

             * requested it AND we have a single, non-fully-qualified NameSeg

             */

            if ((SearchParentFlag != ACPI_NS_NO_UPSEARCH) &&

                (Flags & ACPI_NS_SEARCH_PARENT))

            {

                LocalFlags |= ACPI_NS_SEARCH_PARENT;

            }

            /* Set error flag according to caller */

            if (Flags & ACPI_NS_ERROR_IF_FOUND)

            {

                LocalFlags |= ACPI_NS_ERROR_IF_FOUND;

            }

        }

        /* Extract one ACPI name from the front of the pathname */

        ACPI_MOVE_32_TO_32 (&SimpleName, Path);

        /* Try to find the single (4 character) ACPI name */

        Status = AcpiNsSearchAndEnter (SimpleName, WalkState, CurrentNode,

                    InterpreterMode, ThisSearchType, LocalFlags, &ThisNode);

        if (ACPI_FAILURE (Status))

        {

            if (Status == AE_NOT_FOUND)

            {

                /* Name not found in ACPI namespace */

                ACPI_DEBUG_PRINT ((ACPI_DB_NAMES,

                    "Name [%4.4s] not found in scope [%4.4s] %p\n",

                    (char *) &SimpleName, (char *) &CurrentNode->Name,

                    CurrentNode));

            }

            *ReturnNode = ThisNode;

            return_ACPI_STATUS (Status);

        }

        /* More segments to follow? */

        if (NumSegments > 0)

        {

            /*

             * If we have an alias to an object that opens a scope (such as a

             * device or processor), we need to dereference the alias here so

             * that we can access any children of the original node (via the

             * remaining segments).

             */

            if (ThisNode->Type == ACPI_TYPE_LOCAL_ALIAS)

            {

                if (!ThisNode->Object)

                {

                    return_ACPI_STATUS (AE_NOT_EXIST);

                }

                if (AcpiNsOpensScope (((ACPI_NAMESPACE_NODE *)

                        ThisNode->Object)->Type))

                {

                    ThisNode = (ACPI_NAMESPACE_NODE *) ThisNode->Object;

                }

            }

        }

        /* Special handling for the last segment (NumSegments == 0) */

        else

        {

            /*

             * Sanity typecheck of the target object:

             *

             * If 1) This is the last segment (NumSegments == 0)

             *    2) And we are looking for a specific type

             *       (Not checking for TYPE_ANY)

             *    3) Which is not an alias

             *    4) Which is not a local type (TYPE_SCOPE)

             *    5) And the type of target object is known (not TYPE_ANY)

             *    6) And target object does not match what we are looking for

             *

             * Then we have a type mismatch. Just warn and ignore it.

             */

            if ((TypeToCheckFor != ACPI_TYPE_ANY)                   &&

                (TypeToCheckFor != ACPI_TYPE_LOCAL_ALIAS)           &&

                (TypeToCheckFor != ACPI_TYPE_LOCAL_METHOD_ALIAS)    &&

                (TypeToCheckFor != ACPI_TYPE_LOCAL_SCOPE)           &&

                (ThisNode->Type != ACPI_TYPE_ANY)                   &&

                (ThisNode->Type != TypeToCheckFor))

            {

                /* Complain about a type mismatch */

                ACPI_WARNING ((AE_INFO,

                    "NsLookup: Type mismatch on %4.4s (%s), searching for (%s)",

                    ACPI_CAST_PTR (char, &SimpleName),

                    AcpiUtGetTypeName (ThisNode->Type),

                    AcpiUtGetTypeName (TypeToCheckFor)));

            }

            /*

             * If this is the last name segment and we are not looking for a

             * specific type, but the type of found object is known, use that

             * type to (later) see if it opens a scope.

             */

            if (Type == ACPI_TYPE_ANY)

            {

                Type = ThisNode->Type;

            }

        }

        /* Point to next name segment and make this node current */

        Path += ACPI_NAME_SIZE;

        CurrentNode = ThisNode;

    }

    /* Always check if we need to open a new scope */

    if (!(Flags & ACPI_NS_DONT_OPEN_SCOPE) && (WalkState))

    {

        /*

         * If entry is a type which opens a scope, push the new scope on the

         * scope stack.

         */

        if (AcpiNsOpensScope (Type))

        {

            Status = AcpiDsScopeStackPush (ThisNode, Type, WalkState);

            if (ACPI_FAILURE (Status))

            {

                return_ACPI_STATUS (Status);

            }

        }

    }

    *ReturnNode = ThisNode;

    return_ACPI_STATUS (AE_OK);

}