static ACPI_STATUS
AcpiNsInitOneObject (
    ACPI_HANDLE             ObjHandle,
    UINT32                  Level,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_OBJECT_TYPE        Type;
    ACPI_STATUS             Status = AE_OK;
    ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
    ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
    ACPI_OPERAND_OBJECT     *ObjDesc;


    ACPI_FUNCTION_NAME (NsInitOneObject);


    Info->ObjectCount++;

    /* And even then, we are only interested in a few object types */

    Type = AcpiNsGetType (ObjHandle);
    ObjDesc = AcpiNsGetAttachedObject (Node);
    if (!ObjDesc)
    {
        return (AE_OK);
    }

    /* Increment counters for object types we are looking for */

    switch (Type)
    {
    case ACPI_TYPE_REGION:

        Info->OpRegionCount++;
        break;

    case ACPI_TYPE_BUFFER_FIELD:

        Info->FieldCount++;
        break;

    case ACPI_TYPE_LOCAL_BANK_FIELD:

        Info->FieldCount++;
        break;

    case ACPI_TYPE_BUFFER:

        Info->BufferCount++;
        break;

    case ACPI_TYPE_PACKAGE:

        Info->PackageCount++;
        break;

    default:

        /* No init required, just exit now */

        return (AE_OK);
    }

    /* If the object is already initialized, nothing else to do */

    if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID)
    {
        return (AE_OK);
    }

    /* Must lock the interpreter before executing AML code */

    AcpiExEnterInterpreter ();

    /*
     * Each of these types can contain executable AML code within the
     * declaration.
     */
    switch (Type)
    {
    case ACPI_TYPE_REGION:

        Info->OpRegionInit++;
        Status = AcpiDsGetRegionArguments (ObjDesc);
        break;

    case ACPI_TYPE_BUFFER_FIELD:

        Info->FieldInit++;
        Status = AcpiDsGetBufferFieldArguments (ObjDesc);
        break;

    case ACPI_TYPE_LOCAL_BANK_FIELD:

        Info->FieldInit++;
        Status = AcpiDsGetBankFieldArguments (ObjDesc);
        break;

    case ACPI_TYPE_BUFFER:
//.........这里部分代码省略.........

ACPI_STATUS
AcpiExResolveNodeToValue (
    ACPI_NAMESPACE_NODE     **ObjectPtr,
    ACPI_WALK_STATE         *WalkState)

{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *SourceDesc;
    ACPI_OPERAND_OBJECT     *ObjDesc = NULL;
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_OBJECT_TYPE        EntryType;


    ACPI_FUNCTION_TRACE (ExResolveNodeToValue);


    /*
     * The stack pointer points to a ACPI_NAMESPACE_NODE (Node). Get the
     * object that is attached to the Node.
     */
    Node       = *ObjectPtr;
    SourceDesc = AcpiNsGetAttachedObject (Node);
    EntryType  = AcpiNsGetType ((ACPI_HANDLE) Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Entry=%p SourceDesc=%p [%s]\n",
         Node, SourceDesc, AcpiUtGetTypeName (EntryType)));

    if ((EntryType == ACPI_TYPE_LOCAL_ALIAS) ||
        (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))
    {
        /* There is always exactly one level of indirection */

        Node       = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Node->Object);
        SourceDesc = AcpiNsGetAttachedObject (Node);
        EntryType  = AcpiNsGetType ((ACPI_HANDLE) Node);
        *ObjectPtr = Node;
    }

    /*
     * Several object types require no further processing:
     * 1) Device/Thermal objects don't have a "real" subobject, return the Node
     * 2) Method locals and arguments have a pseudo-Node
     * 3) 10/2007: Added method type to assist with Package construction.
     */
    if ((EntryType == ACPI_TYPE_DEVICE)  ||
        (EntryType == ACPI_TYPE_THERMAL) ||
        (EntryType == ACPI_TYPE_METHOD)  ||
        (Node->Flags & (ANOBJ_METHOD_ARG | ANOBJ_METHOD_LOCAL)))
    {
        return_ACPI_STATUS (AE_OK);
    }

    if (!SourceDesc)
    {
        ACPI_ERROR ((AE_INFO, "No object attached to node %p",
            Node));
        return_ACPI_STATUS (AE_AML_NO_OPERAND);
    }

    /*
     * Action is based on the type of the Node, which indicates the type
     * of the attached object or pointer
     */
    switch (EntryType)
    {
    case ACPI_TYPE_PACKAGE:

        if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
        {
            ACPI_ERROR ((AE_INFO, "Object not a Package, type %s",
                AcpiUtGetObjectTypeName (SourceDesc)));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }

        Status = AcpiDsGetPackageArguments (SourceDesc);
        if (ACPI_SUCCESS (Status))
        {
            /* Return an additional reference to the object */

            ObjDesc = SourceDesc;
            AcpiUtAddReference (ObjDesc);
        }
        break;


    case ACPI_TYPE_BUFFER:

        if (SourceDesc->Common.Type != ACPI_TYPE_BUFFER)
        {
            ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s",
                AcpiUtGetObjectTypeName (SourceDesc)));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }

        Status = AcpiDsGetBufferArguments (SourceDesc);
        if (ACPI_SUCCESS (Status))
        {
            /* Return an additional reference to the object */

            ObjDesc = SourceDesc;
//.........这里部分代码省略.........

//.........这里部分代码省略.........
         * Add 1 to count to allow for null terminated internal list
         */
        Info->Parameters = ACPI_ALLOCATE_ZEROED (
            ((ACPI_SIZE) Info->ParamCount + 1) * sizeof (void *));
        if (!Info->Parameters)
        {
            Status = AE_NO_MEMORY;
            goto Cleanup;
        }

        /* Convert each external object in the list to an internal object */

        for (i = 0; i < Info->ParamCount; i++)
        {
            Status = AcpiUtCopyEobjectToIobject (
                &ExternalParams->Pointer[i], &Info->Parameters[i]);
            if (ACPI_FAILURE (Status))
            {
                goto Cleanup;
            }
        }

        Info->Parameters[Info->ParamCount] = NULL;
    }


#if 0

    /*
     * Begin incoming argument count analysis. Check for too few args
     * and too many args.
     */

    switch (AcpiNsGetType (Info->Node))
    {
    case ACPI_TYPE_METHOD:

        /* Check incoming argument count against the method definition */

        if (Info->ObjDesc->Method.ParamCount > Info->ParamCount)
        {
            ACPI_ERROR ((AE_INFO,
                "Insufficient arguments (%u) - %u are required",
                Info->ParamCount,
                Info->ObjDesc->Method.ParamCount));

            Status = AE_MISSING_ARGUMENTS;
            goto Cleanup;
        }

        else if (Info->ObjDesc->Method.ParamCount < Info->ParamCount)
        {
            ACPI_WARNING ((AE_INFO,
                "Excess arguments (%u) - only %u are required",
                Info->ParamCount,
                Info->ObjDesc->Method.ParamCount));

            /* Just pass the required number of arguments */

            Info->ParamCount = Info->ObjDesc->Method.ParamCount;
        }

        /*
         * Any incoming external objects to be passed as arguments to the
         * method must be converted to internal objects
         */

static void
AcpiNsExecModuleCode (
    ACPI_OPERAND_OBJECT     *MethodObj,
    ACPI_EVALUATE_INFO      *Info)
{
    ACPI_OPERAND_OBJECT     *ParentObj;
    ACPI_NAMESPACE_NODE     *ParentNode;
    ACPI_OBJECT_TYPE        Type;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (NsExecModuleCode);


    /*
     * Get the parent node. We cheat by using the NextObject field
     * of the method object descriptor.
     */
    ParentNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE,
                    MethodObj->Method.NextObject);
    Type = AcpiNsGetType (ParentNode);

    /*
     * Get the region handler and save it in the method object. We may need
     * this if an operation region declaration causes a _REG method to be run.
     *
     * We can't do this in AcpiPsLinkModuleCode because
     * AcpiGbl_RootNode->Object is NULL at PASS1.
     */
    if ((Type == ACPI_TYPE_DEVICE) && ParentNode->Object)
    {
        MethodObj->Method.Dispatch.Handler =
            ParentNode->Object->Device.Handler;
    }

    /* Must clear NextObject (AcpiNsAttachObject needs the field) */

    MethodObj->Method.NextObject = NULL;

    /* Initialize the evaluation information block */

    ACPI_MEMSET (Info, 0, sizeof (ACPI_EVALUATE_INFO));
    Info->PrefixNode = ParentNode;

    /*
     * Get the currently attached parent object. Add a reference, because the
     * ref count will be decreased when the method object is installed to
     * the parent node.
     */
    ParentObj = AcpiNsGetAttachedObject (ParentNode);
    if (ParentObj)
    {
        AcpiUtAddReference (ParentObj);
    }

    /* Install the method (module-level code) in the parent node */

    Status = AcpiNsAttachObject (ParentNode, MethodObj,
                ACPI_TYPE_METHOD);
    if (ACPI_FAILURE (Status))
    {
        goto Exit;
    }

    /* Execute the parent node as a control method */

    Status = AcpiNsEvaluate (Info);

    ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "Executed module-level code at %p\n",
        MethodObj->Method.AmlStart));

    /* Delete a possible implicit return value (in slack mode) */

    if (Info->ReturnObject)
    {
        AcpiUtRemoveReference (Info->ReturnObject);
    }

    /* Detach the temporary method object */

    AcpiNsDetachObject (ParentNode);

    /* Restore the original parent object */

    if (ParentObj)
    {
        Status = AcpiNsAttachObject (ParentNode, ParentObj, Type);
    }
    else
    {
        ParentNode->Type = (UINT8) Type;
    }

Exit:
    if (ParentObj)
    {
        AcpiUtRemoveReference (ParentObj);
    }
    return_VOID;
}

ACPI_STATUS
AcpiExStoreObjectToNode (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_WALK_STATE         *WalkState,
    UINT8                   ImplicitConversion)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *TargetDesc;
    ACPI_OPERAND_OBJECT     *NewDesc;
    ACPI_OBJECT_TYPE        TargetType;


    ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);


    /* Get current type of the node, and object attached to Node */

    TargetType = AcpiNsGetType (Node);
    TargetDesc = AcpiNsGetAttachedObject (Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p (%s) to node %p (%s)\n",
        SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
              Node, AcpiUtGetTypeName (TargetType)));

    /*
     * Resolve the source object to an actual value
     * (If it is a reference object)
     */
    Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Do the actual store operation */

    switch (TargetType)
    {
    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:
        /*
         * The simple data types all support implicit source operand
         * conversion before the store.
         */

        if ((WalkState->Opcode == AML_COPY_OP) ||
            !ImplicitConversion)
        {
            /*
             * However, CopyObject and Stores to ArgX do not perform
             * an implicit conversion, as per the ACPI specification.
             * A direct store is performed instead.
             */
            Status = AcpiExStoreDirectToNode (SourceDesc, Node,
                WalkState);
            break;
        }

        /* Store with implicit source operand conversion support */

        Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc,
            &NewDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        if (NewDesc != TargetDesc)
        {
            /*
             * Store the new NewDesc as the new value of the Name, and set
             * the Name's type to that of the value being stored in it.
             * SourceDesc reference count is incremented by AttachObject.
             *
             * Note: This may change the type of the node if an explicit
             * store has been performed such that the node/object type
             * has been changed.
             */
            Status = AcpiNsAttachObject (Node, NewDesc,
                NewDesc->Common.Type);

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                "Store %s into %s via Convert/Attach\n",
                AcpiUtGetObjectTypeName (SourceDesc),
                AcpiUtGetObjectTypeName (NewDesc)));
        }
        break;

    case ACPI_TYPE_BUFFER_FIELD:
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:
        /*
         * For all fields, always write the source data to the target
         * field. Any required implicit source operand conversion is
         * performed in the function below as necessary. Note, field
         * objects must retain their original type permanently.
         */
//.........这里部分代码省略.........

ACPI_STATUS
AcpiDsInitOneObject (
    ACPI_HANDLE             ObjHandle,
    UINT32                  Level,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_OBJECT_TYPE        Type;
    ACPI_STATUS             Status;
    ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;


    ACPI_FUNCTION_NAME ("DsInitOneObject");


    /*
     * We are only interested in objects owned by the table that
     * was just loaded
     */
    if (((ACPI_NAMESPACE_NODE *) ObjHandle)->OwnerId !=
            Info->TableDesc->TableId)
    {
        return (AE_OK);
    }

    Info->ObjectCount++;

    /* And even then, we are only interested in a few object types */

    Type = AcpiNsGetType (ObjHandle);

    switch (Type)
    {
    case ACPI_TYPE_REGION:

        Status = AcpiDsInitializeRegion (ObjHandle);
        if (ACPI_FAILURE (Status))
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region %p [%4.4s] - Init failure, %s\n",
                ObjHandle, ((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Ascii,
                AcpiFormatException (Status)));
        }

        Info->OpRegionCount++;
        break;


    case ACPI_TYPE_METHOD:

        Info->MethodCount++;

        /* Print a dot for each method unless we are going to print the entire pathname */

        if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES))
        {
            ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, "."));
        }

        /*
         * Set the execution data width (32 or 64) based upon the
         * revision number of the parent ACPI table.
         * TBD: This is really for possible future support of integer width
         * on a per-table basis. Currently, we just use a global for the width.
         */
        if (Info->TableDesc->Pointer->Revision == 1)
        {
            ((ACPI_NAMESPACE_NODE *) ObjHandle)->Flags |= ANOBJ_DATA_WIDTH_32;
        }

        /*
         * Always parse methods to detect errors, we may delete
         * the parse tree below
         */
        Status = AcpiDsParseMethod (ObjHandle);
        if (ACPI_FAILURE (Status))
        {
            ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Method %p [%4.4s] - parse failure, %s\n",
                ObjHandle, ((ACPI_NAMESPACE_NODE *) ObjHandle)->Name.Ascii,
                AcpiFormatException (Status)));

            /* This parse failed, but we will continue parsing more methods */

            break;
        }

        /*
         * Delete the parse tree.  We simple re-parse the method
         * for every execution since there isn't much overhead
         */
        AcpiNsDeleteNamespaceSubtree (ObjHandle);
        AcpiNsDeleteNamespaceByOwner (((ACPI_NAMESPACE_NODE *) ObjHandle)->Object->Method.OwningId);
        break;


    case ACPI_TYPE_DEVICE:

        Info->DeviceCount++;
        break;


//.........这里部分代码省略.........

ACPI_STATUS
AcpiNsEvaluate (
    ACPI_EVALUATE_INFO      *Info)
{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (NsEvaluate);


    if (!Info)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    if (!Info->Node)
    {
        /*
         * Get the actual namespace node for the target object if we
         * need to. Handles these cases:
         *
         * 1) Null node, valid pathname from root (absolute path)
         * 2) Node and valid pathname (path relative to Node)
         * 3) Node, Null pathname
         */
        Status = AcpiNsGetNode (Info->PrefixNode, Info->RelativePathname,
            ACPI_NS_NO_UPSEARCH, &Info->Node);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }
    }

    /*
     * For a method alias, we must grab the actual method node so that
     * proper scoping context will be established before execution.
     */
    if (AcpiNsGetType (Info->Node) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
    {
        Info->Node = ACPI_CAST_PTR (
            ACPI_NAMESPACE_NODE, Info->Node->Object);
    }

    /* Complete the info block initialization */

    Info->ReturnObject = NULL;
    Info->NodeFlags = Info->Node->Flags;
    Info->ObjDesc = AcpiNsGetAttachedObject (Info->Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n",
        Info->RelativePathname, Info->Node,
        AcpiNsGetAttachedObject (Info->Node)));

    /* Get info if we have a predefined name (_HID, etc.) */

    Info->Predefined = AcpiUtMatchPredefinedMethod (Info->Node->Name.Ascii);

    /* Get the full pathname to the object, for use in warning messages */

    Info->FullPathname = AcpiNsGetExternalPathname (Info->Node);
    if (!Info->FullPathname)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Count the number of arguments being passed in */

    Info->ParamCount = 0;
    if (Info->Parameters)
    {
        while (Info->Parameters[Info->ParamCount])
        {
            Info->ParamCount++;
        }

        /* Warn on impossible argument count */

        if (Info->ParamCount > ACPI_METHOD_NUM_ARGS)
        {
            ACPI_WARN_PREDEFINED ((AE_INFO, Info->FullPathname, ACPI_WARN_ALWAYS,
                "Excess arguments (%u) - using only %u",
                Info->ParamCount, ACPI_METHOD_NUM_ARGS));

            Info->ParamCount = ACPI_METHOD_NUM_ARGS;
        }
    }

    /*
     * For predefined names: Check that the declared argument count
     * matches the ACPI spec -- otherwise this is a BIOS error.
     */
    AcpiNsCheckAcpiCompliance (Info->FullPathname, Info->Node,
        Info->Predefined);

    /*
     * For all names: Check that the incoming argument count for
     * this method/object matches the actual ASL/AML definition.
     */
    AcpiNsCheckArgumentCount (Info->FullPathname, Info->Node,
        Info->ParamCount, Info->Predefined);
//.........这里部分代码省略.........

ACPI_STATUS
AcpiExPrepFieldValue (
    ACPI_CREATE_FIELD_INFO  *Info)
{
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_OPERAND_OBJECT     *SecondDesc = NULL;
    ACPI_STATUS             Status;
    UINT32                  AccessByteWidth;
    UINT32                  Type;


    ACPI_FUNCTION_TRACE (ExPrepFieldValue);


    /* Parameter validation */

    if (Info->FieldType != ACPI_TYPE_LOCAL_INDEX_FIELD)
    {
        if (!Info->RegionNode)
        {
            ACPI_ERROR ((AE_INFO, "Null RegionNode"));
            return_ACPI_STATUS (AE_AML_NO_OPERAND);
        }

        Type = AcpiNsGetType (Info->RegionNode);
        if (Type != ACPI_TYPE_REGION)
        {
            ACPI_ERROR ((AE_INFO, "Needed Region, found type 0x%X (%s)",
                Type, AcpiUtGetTypeName (Type)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
    }

    /* Allocate a new field object */

    ObjDesc = AcpiUtCreateInternalObject (Info->FieldType);
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Initialize areas of the object that are common to all fields */

    ObjDesc->CommonField.Node = Info->FieldNode;
    Status = AcpiExPrepCommonFieldObject (ObjDesc,
                Info->FieldFlags, Info->Attribute,
                Info->FieldBitPosition, Info->FieldBitLength);
    if (ACPI_FAILURE (Status))
    {
        AcpiUtDeleteObjectDesc (ObjDesc);
        return_ACPI_STATUS (Status);
    }

    /* Initialize areas of the object that are specific to the field type */

    switch (Info->FieldType)
    {
    case ACPI_TYPE_LOCAL_REGION_FIELD:

        ObjDesc->Field.RegionObj = AcpiNsGetAttachedObject (Info->RegionNode);

        /* Fields specific to GenericSerialBus fields */

        ObjDesc->Field.AccessLength = Info->AccessLength;

        if (Info->ConnectionNode)
        {
            SecondDesc = Info->ConnectionNode->Object;
            if (!(SecondDesc->Common.Flags & AOPOBJ_DATA_VALID))
            {
                Status = AcpiDsGetBufferArguments (SecondDesc);
                if (ACPI_FAILURE (Status))
                {
                    AcpiUtDeleteObjectDesc (ObjDesc);
                    return_ACPI_STATUS (Status);
                }
            }

            ObjDesc->Field.ResourceBuffer = SecondDesc->Buffer.Pointer;
            ObjDesc->Field.ResourceLength = (UINT16) SecondDesc->Buffer.Length;
        }
        else if (Info->ResourceBuffer)
        {
            ObjDesc->Field.ResourceBuffer = Info->ResourceBuffer;
            ObjDesc->Field.ResourceLength = Info->ResourceLength;
        }

        /* Allow full data read from EC address space */

        if ((ObjDesc->Field.RegionObj->Region.SpaceId == ACPI_ADR_SPACE_EC) &&
            (ObjDesc->CommonField.BitLength > 8))
        {
            AccessByteWidth = ACPI_ROUND_BITS_UP_TO_BYTES (
                ObjDesc->CommonField.BitLength);

            /* Maximum byte width supported is 255 */

            if (AccessByteWidth < 256)
            {
//.........这里部分代码省略.........

static ACPI_STATUS
AcpiDsInitOneObject (
    ACPI_HANDLE             ObjHandle,
    UINT32                  Level,
    void                    *Context,
    void                    **ReturnValue)
{
    ACPI_INIT_WALK_INFO     *Info = (ACPI_INIT_WALK_INFO *) Context;
    ACPI_NAMESPACE_NODE     *Node = (ACPI_NAMESPACE_NODE *) ObjHandle;
    ACPI_OBJECT_TYPE        Type;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_ENTRY ();


    /*
     * We are only interested in NS nodes owned by the table that
     * was just loaded
     */
    if (Node->OwnerId != Info->OwnerId)
    {
        return (AE_OK);
    }

    Info->ObjectCount++;

    /* And even then, we are only interested in a few object types */

    Type = AcpiNsGetType (ObjHandle);

    switch (Type)
    {
    case ACPI_TYPE_REGION:

        Status = AcpiDsInitializeRegion (ObjHandle);
        if (ACPI_FAILURE (Status))
        {
            ACPI_EXCEPTION ((AE_INFO, Status,
                "During Region initialization %p [%4.4s]",
                ObjHandle, AcpiUtGetNodeName (ObjHandle)));
        }

        Info->OpRegionCount++;
        break;


    case ACPI_TYPE_METHOD:

        Info->MethodCount++;
        break;


    case ACPI_TYPE_DEVICE:

        Info->DeviceCount++;
        break;


    default:
        break;
    }

    /*
     * We ignore errors from above, and always return OK, since
     * we don't want to abort the walk on a single error.
     */
    return (AE_OK);
}

ACPI_STATUS
AcpiExStoreObjectToNode (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_WALK_STATE         *WalkState,
    UINT8                   ImplicitConversion)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *TargetDesc;
    ACPI_OPERAND_OBJECT     *NewDesc;
    ACPI_OBJECT_TYPE        TargetType;


    ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);


    /* Get current type of the node, and object attached to Node */

    TargetType = AcpiNsGetType (Node);
    TargetDesc = AcpiNsGetAttachedObject (Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p [%s] to node %p [%s]\n",
        SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
        Node, AcpiUtGetTypeName (TargetType)));

    /* Only limited target types possible for everything except CopyObject */

    if (WalkState->Opcode != AML_COPY_OBJECT_OP)
    {
        /*
         * Only CopyObject allows all object types to be overwritten. For
         * TargetRef(s), there are restrictions on the object types that
         * are allowed.
         *
         * Allowable operations/typing for Store:
         *
         * 1) Simple Store
         *      Integer     --> Integer (Named/Local/Arg)
         *      String      --> String  (Named/Local/Arg)
         *      Buffer      --> Buffer  (Named/Local/Arg)
         *      Package     --> Package (Named/Local/Arg)
         *
         * 2) Store with implicit conversion
         *      Integer     --> String or Buffer  (Named)
         *      String      --> Integer or Buffer (Named)
         *      Buffer      --> Integer or String (Named)
         */
        switch (TargetType)
        {
        case ACPI_TYPE_PACKAGE:
            /*
             * Here, can only store a package to an existing package.
             * Storing a package to a Local/Arg is OK, and handled
             * elsewhere.
             */
            if (WalkState->Opcode == AML_STORE_OP)
            {
                if (SourceDesc->Common.Type != ACPI_TYPE_PACKAGE)
                {
                    ACPI_ERROR ((AE_INFO,
                        "Cannot assign type [%s] to [Package] "
                        "(source must be type Pkg)",
                        AcpiUtGetObjectTypeName (SourceDesc)));

                    return_ACPI_STATUS (AE_AML_TARGET_TYPE);
                }
                break;
            }

        /* Fallthrough */

        case ACPI_TYPE_DEVICE:
        case ACPI_TYPE_EVENT:
        case ACPI_TYPE_MUTEX:
        case ACPI_TYPE_REGION:
        case ACPI_TYPE_POWER:
        case ACPI_TYPE_PROCESSOR:
        case ACPI_TYPE_THERMAL:

            ACPI_ERROR ((AE_INFO,
                "Target must be [Buffer/Integer/String/Reference]"
                ", found [%s] (%4.4s)",
                AcpiUtGetTypeName (Node->Type), Node->Name.Ascii));

            return_ACPI_STATUS (AE_AML_TARGET_TYPE);

        default:
            break;
        }
    }

    /*
     * Resolve the source object to an actual value
     * (If it is a reference object)
     */
    Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
//.........这里部分代码省略.........

ACPI_STATUS
AcpiNsEvaluate (
    ACPI_EVALUATE_INFO      *Info)
{
    ACPI_STATUS             Status;
    ACPI_NAMESPACE_NODE     *Node;


    ACPI_FUNCTION_TRACE (NsEvaluate);


    if (!Info)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /* Initialize the return value to an invalid object */

    Info->ReturnObject = NULL;
    Info->ParamCount = 0;

    /*
     * Get the actual namespace node for the target object. Handles these cases:
     *
     * 1) Null node, Pathname (absolute path)
     * 2) Node, Pathname (path relative to Node)
     * 3) Node, Null Pathname
     */
    Status = AcpiNsGetNode (Info->PrefixNode, Info->Pathname,
                ACPI_NS_NO_UPSEARCH, &Info->ResolvedNode);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * For a method alias, we must grab the actual method node so that proper
     * scoping context will be established before execution.
     */
    if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_LOCAL_METHOD_ALIAS)
    {
        Info->ResolvedNode =
            ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Info->ResolvedNode->Object);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_NAMES, "%s [%p] Value %p\n", Info->Pathname,
        Info->ResolvedNode, AcpiNsGetAttachedObject (Info->ResolvedNode)));

    Node = Info->ResolvedNode;

    /*
     * Two major cases here:
     *
     * 1) The object is a control method -- execute it
     * 2) The object is not a method -- just return it's current value
     */
    if (AcpiNsGetType (Info->ResolvedNode) == ACPI_TYPE_METHOD)
    {
        /*
         * 1) Object is a control method - execute it
         */

        /* Verify that there is a method object associated with this node */

        Info->ObjDesc = AcpiNsGetAttachedObject (Info->ResolvedNode);
        if (!Info->ObjDesc)
        {
            ACPI_ERROR ((AE_INFO, "Control method has no attached sub-object"));
            return_ACPI_STATUS (AE_NULL_OBJECT);
        }

        /* Count the number of arguments being passed to the method */

        if (Info->Parameters)
        {
            while (Info->Parameters[Info->ParamCount])
            {
                if (Info->ParamCount > ACPI_METHOD_MAX_ARG)
                {
                    return_ACPI_STATUS (AE_LIMIT);
                }
                Info->ParamCount++;
            }
        }

        ACPI_DUMP_PATHNAME (Info->ResolvedNode, "ACPI: Execute Method",
            ACPI_LV_INFO, _COMPONENT);

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "Method at AML address %p Length %X\n",
            Info->ObjDesc->Method.AmlStart + 1,
            Info->ObjDesc->Method.AmlLength - 1));

        /*
         * Any namespace deletion must acquire both the namespace and
         * interpreter locks to ensure that no thread is using the portion of
         * the namespace that is being deleted.
         *
         * Execute the method via the interpreter. The interpreter is locked
         * here before calling into the AML parser
//.........这里部分代码省略.........

ACPI_STATUS
AcpiExStoreObjectToNode (
    ACPI_OPERAND_OBJECT     *SourceDesc,
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_WALK_STATE         *WalkState,
    UINT8                   ImplicitConversion)
{
    ACPI_STATUS             Status = AE_OK;
    ACPI_OPERAND_OBJECT     *TargetDesc;
    ACPI_OPERAND_OBJECT     *NewDesc;
    ACPI_OBJECT_TYPE        TargetType;


    ACPI_FUNCTION_TRACE_PTR (ExStoreObjectToNode, SourceDesc);


    /* Get current type of the node, and object attached to Node */

    TargetType = AcpiNsGetType (Node);
    TargetDesc = AcpiNsGetAttachedObject (Node);

    ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Storing %p(%s) into node %p(%s)\n",
        SourceDesc, AcpiUtGetObjectTypeName (SourceDesc),
              Node, AcpiUtGetTypeName (TargetType)));

    /*
     * Resolve the source object to an actual value
     * (If it is a reference object)
     */
    Status = AcpiExResolveObject (&SourceDesc, TargetType, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* If no implicit conversion, drop into the default case below */

    if ((!ImplicitConversion) ||
          ((WalkState->Opcode == AML_COPY_OP) &&
           (TargetType != ACPI_TYPE_LOCAL_REGION_FIELD) &&
           (TargetType != ACPI_TYPE_LOCAL_BANK_FIELD) &&
           (TargetType != ACPI_TYPE_LOCAL_INDEX_FIELD)))
    {
        /*
         * Force execution of default (no implicit conversion). Note:
         * CopyObject does not perform an implicit conversion, as per the ACPI
         * spec -- except in case of region/bank/index fields -- because these
         * objects must retain their original type permanently.
         */
        TargetType = ACPI_TYPE_ANY;
    }

    /* Do the actual store operation */

    switch (TargetType)
    {
    case ACPI_TYPE_BUFFER_FIELD:
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:

        /* For fields, copy the source data to the target field. */

        Status = AcpiExWriteDataToField (SourceDesc, TargetDesc,
                    &WalkState->ResultObj);
        break;


    case ACPI_TYPE_INTEGER:
    case ACPI_TYPE_STRING:
    case ACPI_TYPE_BUFFER:

        /*
         * These target types are all of type Integer/String/Buffer, and
         * therefore support implicit conversion before the store.
         *
         * Copy and/or convert the source object to a new target object
         */
        Status = AcpiExStoreObjectToObject (SourceDesc, TargetDesc,
                    &NewDesc, WalkState);
        if (ACPI_FAILURE (Status))
        {
            return_ACPI_STATUS (Status);
        }

        if (NewDesc != TargetDesc)
        {
            /*
             * Store the new NewDesc as the new value of the Name, and set
             * the Name's type to that of the value being stored in it.
             * SourceDesc reference count is incremented by AttachObject.
             *
             * Note: This may change the type of the node if an explicit store
             * has been performed such that the node/object type has been
             * changed.
             */
            Status = AcpiNsAttachObject (Node, NewDesc, NewDesc->Common.Type);

            ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
                "Store %s into %s via Convert/Attach\n",
//.........这里部分代码省略.........

ACPI_STATUS
AcpiNsEvaluateByHandle (
    ACPI_NAMESPACE_NODE     *Handle,
    ACPI_OPERAND_OBJECT     **Params,
    ACPI_OPERAND_OBJECT     **ReturnObject)
{
    ACPI_NAMESPACE_NODE     *Node;
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *LocalReturnObject;


    ACPI_FUNCTION_TRACE ("NsEvaluateByHandle");


    /* Check if namespace has been initialized */

    if (!AcpiGbl_RootNode)
    {
        return_ACPI_STATUS (AE_NO_NAMESPACE);
    }

    /* Parameter Validation */

    if (!Handle)
    {
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    if (ReturnObject)
    {
        /* Initialize the return value to an invalid object */

        *ReturnObject = NULL;
    }

    /* Get the prefix handle and Node */

    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    Node = AcpiNsMapHandleToNode (Handle);
    if (!Node)
    {
        (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
        return_ACPI_STATUS (AE_BAD_PARAMETER);
    }

    /*
     * Two major cases here:
     * 1) The object is an actual control method -- execute it.
     * 2) The object is not a method -- just return it's current
     *      value
     *
     * In both cases, the namespace is unlocked by the
     *  AcpiNs* procedure
     */
    if (AcpiNsGetType (Node) == ACPI_TYPE_METHOD)
    {
        /*
         * Case 1) We have an actual control method to execute
         */
        Status = AcpiNsExecuteControlMethod (Node, Params,
                                            &LocalReturnObject);
    }
    else
    {
        /*
         * Case 2) Object is NOT a method, just return its
         * current value
         */
        Status = AcpiNsGetObjectValue (Node, &LocalReturnObject);
    }

    /*
     * Check if there is a return value on the stack that must
     * be dealt with
     */
    if (Status == AE_CTRL_RETURN_VALUE)
    {
        /*
         * If the Method returned a value and the caller
         * provided a place to store a returned value, Copy
         * the returned value to the object descriptor provided
         * by the caller.
         */
        if (ReturnObject)
        {
            /*
             * Valid return object, copy the pointer to
             * the returned object
             */
            *ReturnObject = LocalReturnObject;
        }

        /* Map AE_CTRL_RETURN_VALUE to AE_OK, we are done with it */

        Status = AE_OK;
//.........这里部分代码省略.........