C++ AcpiPsParseAml函数代码示例

ACPI_STATUS
AcpiDsAutoSerializeMethod (
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_OPERAND_OBJECT     *ObjDesc)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op = NULL;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_TRACE_PTR (DsAutoSerializeMethod, Node);


    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "Method auto-serialization parse [%4.4s] %p\n",
        AcpiUtGetNodeName (Node), Node));

    /* Create/Init a root op for the method parse tree */

    Op = AcpiPsAllocOp (AML_METHOD_OP);
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    AcpiPsSetName (Op, Node->Name.Integer);
    Op->Common.Node = Node;

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (Node->OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, Node, ObjDesc->Method.AmlStart,
                ObjDesc->Method.AmlLength, NULL, 0);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        return_ACPI_STATUS (Status);
    }

    WalkState->DescendingCallback = AcpiDsDetectNamedOpcodes;

    /* Parse the method, scan for creation of named objects */

    Status = AcpiPsParseAml (WalkState);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    AcpiPsDeleteParseTree (Op);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDbDisassembleMethod (
    char                    *Name)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_NAMESPACE_NODE     *Method;


    Method = AcpiDbConvertToNode (Name);
    if (!Method)
    {
        return (AE_BAD_PARAMETER);
    }

    ObjDesc = Method->Object;

    Op = AcpiPsCreateScopeOp ();
    if (!Op)
    {
        return (AE_NO_MEMORY);
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
    if (!WalkState)
    {
        return (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL,
                    ObjDesc->Method.AmlStart,
                    ObjDesc->Method.AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Parse the AML */

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
    Status = AcpiPsParseAml (WalkState);

    AcpiDmDisassemble (NULL, Op, 0);
    AcpiPsDeleteParseTree (Op);
    return (AE_OK);
}

ACPI_STATUS
AcpiNsOneCompleteParse (
    UINT32                  PassNumber,
    ACPI_TABLE_DESC         *TableDesc)
{
    ACPI_PARSE_OBJECT       *ParseRoot;
    ACPI_STATUS             Status;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_TRACE ("NsOneCompleteParse");


    /* Create and init a Root Node */

    ParseRoot = AcpiPsCreateScopeOp ();
    if (!ParseRoot)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }


    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (TABLE_ID_DSDT,
                                    NULL, NULL, NULL);
    if (!WalkState)
    {
        AcpiPsFreeOp (ParseRoot);
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, ParseRoot, NULL, TableDesc->AmlStart,
                    TableDesc->AmlLength, NULL, NULL, PassNumber);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        return_ACPI_STATUS (Status);
    }

    /* Parse the AML */

    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "*PARSE* pass %d parse\n", PassNumber));
    Status = AcpiPsParseAml (WalkState);

    AcpiPsDeleteParseTree (ParseRoot);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDbDisassembleMethod (
    char                    *Name)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    ACPI_NAMESPACE_NODE     *Method;


    Method = AcpiDbConvertToNode (Name);
    if (!Method)
    {
        return (AE_BAD_PARAMETER);
    }

    if (Method->Type != ACPI_TYPE_METHOD)
    {
        ACPI_ERROR ((AE_INFO, "%s (%s): Object must be a control method",
            Name, AcpiUtGetTypeName (Method->Type)));
        return (AE_BAD_PARAMETER);
    }

    ObjDesc = Method->Object;

    Op = AcpiPsCreateScopeOp ();
    if (!Op)
    {
        return (AE_NO_MEMORY);
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
    if (!WalkState)
    {
        return (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL,
        ObjDesc->Method.AmlStart,
        ObjDesc->Method.AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
    WalkState->OwnerId = ObjDesc->Method.OwnerId;

    /* Push start scope on scope stack and make it current */

    Status = AcpiDsScopeStackPush (Method,
        Method->Type, WalkState);
    if (ACPI_FAILURE (Status))
    {
        return (Status);
    }

    /* Parse the entire method AML including deferred operators */

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;

    Status = AcpiPsParseAml (WalkState);
    (void) AcpiDmParseDeferredOps (Op);

    /* Now we can disassemble the method */

    AcpiGbl_DbOpt_verbose = FALSE;
    AcpiDmDisassemble (NULL, Op, 0);
    AcpiGbl_DbOpt_verbose = TRUE;

    AcpiPsDeleteParseTree (Op);

    /* Method cleanup */

    AcpiNsDeleteNamespaceSubtree (Method);
    AcpiNsDeleteNamespaceByOwner (ObjDesc->Method.OwnerId);
    AcpiUtReleaseOwnerId (&ObjDesc->Method.OwnerId);
    return (AE_OK);
}

ACPI_STATUS
AcpiDbSecondPassParse (
    ACPI_PARSE_OBJECT       *Root)
{
    ACPI_PARSE_OBJECT       *Op = Root;
    ACPI_PARSE_OBJECT       *Method;
    ACPI_PARSE_OBJECT       *SearchOp;
    ACPI_PARSE_OBJECT       *StartOp;
    ACPI_STATUS             Status = AE_OK;
    UINT32                  BaseAmlOffset;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_ENTRY ();


    AcpiOsPrintf ("Pass two parse ....\n");

    while (Op)
    {
        if (Op->Common.AmlOpcode == AML_METHOD_OP)
        {
            Method = Op;

            /* Create a new walk state for the parse */

            WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
            if (!WalkState)
            {
                return (AE_NO_MEMORY);
            }

            /* Init the Walk State */

            WalkState->ParserState.Aml          =
            WalkState->ParserState.AmlStart     = Method->Named.Data;
            WalkState->ParserState.AmlEnd       =
            WalkState->ParserState.PkgEnd       = Method->Named.Data +
                                                  Method->Named.Length;
            WalkState->ParserState.StartScope   = Op;

            WalkState->DescendingCallback       = AcpiDsLoad1BeginOp;
            WalkState->AscendingCallback        = AcpiDsLoad1EndOp;

            /* Perform the AML parse */

            Status = AcpiPsParseAml (WalkState);

            BaseAmlOffset = (Method->Common.Value.Arg)->Common.AmlOffset + 1;
            StartOp = (Method->Common.Value.Arg)->Common.Next;
            SearchOp = StartOp;

            while (SearchOp)
            {
                SearchOp->Common.AmlOffset += BaseAmlOffset;
                SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
            }
        }

        if (Op->Common.AmlOpcode == AML_REGION_OP)
        {
            /* TBD: [Investigate] this isn't quite the right thing to do! */
            /*
             *
             * Method = (ACPI_DEFERRED_OP *) Op;
             * Status = AcpiPsParseAml (Op, Method->Body, Method->BodyLength);
             */
        }

        if (ACPI_FAILURE (Status))
        {
            break;
        }

        Op = AcpiPsGetDepthNext (Root, Op);
    }

    return (Status);
}

static ACPI_STATUS
AcpiDmDeferredParse (
    ACPI_PARSE_OBJECT       *Op,
    UINT8                   *Aml,
    UINT32                  AmlLength)
{
    ACPI_WALK_STATE         *WalkState;
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *SearchOp;
    ACPI_PARSE_OBJECT       *StartOp;
    UINT32                  BaseAmlOffset;
    ACPI_PARSE_OBJECT       *NewRootOp;
    ACPI_PARSE_OBJECT       *ExtraOp;


    ACPI_FUNCTION_TRACE (DmDeferredParse);


    if (!Aml || !AmlLength)
    {
        return_ACPI_STATUS (AE_OK);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Parsing deferred opcode %s [%4.4s]\n",
        Op->Common.AmlOpName, (char *) &Op->Named.Name));

    /* Need a new walk state to parse the AML */

    WalkState = AcpiDsCreateWalkState (0, Op, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, Aml,
        AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Parse the AML for this deferred opcode */

    WalkState->ParseFlags &= ~ACPI_PARSE_DELETE_TREE;
    WalkState->ParseFlags |= ACPI_PARSE_DISASSEMBLE;
    Status = AcpiPsParseAml (WalkState);

    /*
     * We need to update all of the AML offsets, since the parser thought
     * that the method began at offset zero. In reality, it began somewhere
     * within the ACPI table, at the BaseAmlOffset. Walk the entire tree that
     * was just created and update the AmlOffset in each Op.
     */
    BaseAmlOffset = (Op->Common.Value.Arg)->Common.AmlOffset + 1;
    StartOp = (Op->Common.Value.Arg)->Common.Next;
    SearchOp = StartOp;

    while (SearchOp)
    {
        SearchOp->Common.AmlOffset += BaseAmlOffset;
        SearchOp = AcpiPsGetDepthNext (StartOp, SearchOp);
    }

    /*
     * For Buffer and Package opcodes, link the newly parsed subtree
     * into the main parse tree
     */
    switch (Op->Common.AmlOpcode)
    {
    case AML_BUFFER_OP:
    case AML_PACKAGE_OP:
    case AML_VAR_PACKAGE_OP:

        switch (Op->Common.AmlOpcode)
        {
        case AML_PACKAGE_OP:

            ExtraOp = Op->Common.Value.Arg;
            NewRootOp = ExtraOp->Common.Next;
            ACPI_FREE (ExtraOp);
            break;

        case AML_VAR_PACKAGE_OP:
        case AML_BUFFER_OP:
        default:

            NewRootOp = Op->Common.Value.Arg;
            break;
        }

        Op->Common.Value.Arg = NewRootOp->Common.Value.Arg;

        /* Must point all parents to the main tree */

        StartOp = Op;
        SearchOp = StartOp;
        while (SearchOp)
        {
            if (SearchOp->Common.Parent == NewRootOp)
            {
//.........这里部分代码省略.........

static ACPI_STATUS
AcpiDsExecuteArguments (
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_NAMESPACE_NODE     *ScopeNode,
    UINT32                  AmlLength,
    UINT8                   *AmlStart)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_TRACE (DsExecuteArguments);


    /*
     * Allocate a new parser op to be the root of the parsed tree
     */
    Op = AcpiPsAllocOp (AML_INT_EVAL_SUBTREE_OP);
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Save the Node for use in AcpiPsParseAml */

    Op->Common.Node = ScopeNode;

    /* Create and initialize a new parser state */

    WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
    if (!WalkState)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, AmlStart,
                    AmlLength, NULL, ACPI_IMODE_LOAD_PASS1);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /* Mark this parse as a deferred opcode */

    WalkState->ParseFlags = ACPI_PARSE_DEFERRED_OP;
    WalkState->DeferredNode = Node;

    /* Pass1: Parse the entire declaration */

    Status = AcpiPsParseAml (WalkState);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    /* Get and init the Op created above */

    Op->Common.Node = Node;
    AcpiPsDeleteParseTree (Op);

    /* Evaluate the deferred arguments */

    Op = AcpiPsAllocOp (AML_INT_EVAL_SUBTREE_OP);
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Op->Common.Node = ScopeNode;

    /* Create and initialize a new parser state */

    WalkState = AcpiDsCreateWalkState (0, NULL, NULL, NULL);
    if (!WalkState)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /* Execute the opcode and arguments */

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, AmlStart,
                    AmlLength, NULL, ACPI_IMODE_EXECUTE);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /* Mark this execution as a deferred opcode */

    WalkState->DeferredNode = Node;
    Status = AcpiPsParseAml (WalkState);

Cleanup:
    AcpiPsDeleteParseTree (Op);
    return_ACPI_STATUS (Status);
//.........这里部分代码省略.........

ACPI_STATUS
AcpiPsxExecute (
    ACPI_NAMESPACE_NODE     *MethodNode,
    ACPI_OPERAND_OBJECT     **Params,
    ACPI_OPERAND_OBJECT     **ReturnObjDesc)
{
    ACPI_STATUS             Status;
    ACPI_OPERAND_OBJECT     *ObjDesc;
    UINT32                  i;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;


    ACPI_FUNCTION_TRACE ("PsxExecute");


    /* Validate the Node and get the attached object */

    if (!MethodNode)
    {
        return_ACPI_STATUS (AE_NULL_ENTRY);
    }

    ObjDesc = AcpiNsGetAttachedObject (MethodNode);
    if (!ObjDesc)
    {
        return_ACPI_STATUS (AE_NULL_OBJECT);
    }

    /* Init for new method, wait on concurrency semaphore */

    Status = AcpiDsBeginMethodExecution (MethodNode, ObjDesc, NULL);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    if (Params)
    {
        /*
         * The caller "owns" the parameters, so give each one an extra
         * reference
         */
        for (i = 0; Params[i]; i++)
        {
            AcpiUtAddReference (Params[i]);
        }
    }

    /*
     * 1) Perform the first pass parse of the method to enter any
     * named objects that it creates into the namespace
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "**** Begin Method Parse **** Entry=%p obj=%p\n",
        MethodNode, ObjDesc));

    /* Create and init a Root Node */

    Op = AcpiPsCreateScopeOp ();
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /*
     * Get a new OwnerId for objects created by this method.  Namespace
     * objects (such as Operation Regions) can be created during the
     * first pass parse.
     */
    ObjDesc->Method.OwningId = AcpiUtAllocateOwnerId (ACPI_OWNER_TYPE_METHOD);

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (ObjDesc->Method.OwningId,
                                    NULL, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, MethodNode, ObjDesc->Method.AmlStart,
                    ObjDesc->Method.AmlLength, NULL, NULL, 1);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        return_ACPI_STATUS (Status);
    }

    /* Parse the AML */

    Status = AcpiPsParseAml (WalkState);
    AcpiPsDeleteParseTree (Op);

    /*
     * 2) Execute the method.  Performs second pass parse simultaneously
     */
    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "**** Begin Method Execution **** Entry=%p obj=%p\n",
        MethodNode, ObjDesc));
//.........这里部分代码省略.........

ACPI_STATUS
AcpiPsExecuteTable (
    ACPI_EVALUATE_INFO      *Info)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op = NULL;
    ACPI_WALK_STATE         *WalkState = NULL;


    ACPI_FUNCTION_TRACE (PsExecuteTable);


    /* Create and init a Root Node */

    Op = AcpiPsCreateScopeOp (Info->ObjDesc->Method.AmlStart);
    if (!Op)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (
        Info->ObjDesc->Method.OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, Info->Node,
        Info->ObjDesc->Method.AmlStart,
        Info->ObjDesc->Method.AmlLength, Info, Info->PassNumber);
    if (ACPI_FAILURE (Status))
    {
        goto Cleanup;
    }

    if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
    {
        WalkState->ParseFlags |= ACPI_PARSE_MODULE_LEVEL;
    }

    /* Info->Node is the default location to load the table  */

    if (Info->Node && Info->Node != AcpiGbl_RootNode)
    {
        Status = AcpiDsScopeStackPush (
            Info->Node, ACPI_TYPE_METHOD, WalkState);
        if (ACPI_FAILURE (Status))
        {
            goto Cleanup;
        }
    }

    /*
     * Parse the AML, WalkState will be deleted by ParseAml
     */
    AcpiExEnterInterpreter ();
    Status = AcpiPsParseAml (WalkState);
    AcpiExExitInterpreter ();
    WalkState = NULL;

Cleanup:
    if (WalkState)
    {
        AcpiDsDeleteWalkState (WalkState);
    }
    if (Op)
    {
        AcpiPsDeleteParseTree (Op);
    }
    return_ACPI_STATUS (Status);
}

//.........这里部分代码省略.........

    Op = AcpiPsCreateScopeOp (Info->ObjDesc->Method.AmlStart);
    if (!Op)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    /* Create and initialize a new walk state */

    Info->PassNumber = ACPI_IMODE_EXECUTE;
    WalkState = AcpiDsCreateWalkState (
        Info->ObjDesc->Method.OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        Status = AE_NO_MEMORY;
        goto Cleanup;
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, Info->Node,
        Info->ObjDesc->Method.AmlStart,
        Info->ObjDesc->Method.AmlLength, Info, Info->PassNumber);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)
    {
        WalkState->ParseFlags |= ACPI_PARSE_MODULE_LEVEL;
    }

    /* Invoke an internal method if necessary */

    if (Info->ObjDesc->Method.InfoFlags & ACPI_METHOD_INTERNAL_ONLY)
    {
        Status = Info->ObjDesc->Method.Dispatch.Implementation (WalkState);
        Info->ReturnObject = WalkState->ReturnDesc;

        /* Cleanup states */

        AcpiDsScopeStackClear (WalkState);
        AcpiPsCleanupScope (&WalkState->ParserState);
        AcpiDsTerminateControlMethod (WalkState->MethodDesc, WalkState);
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /*
     * Start method evaluation with an implicit return of zero.
     * This is done for Windows compatibility.
     */
    if (AcpiGbl_EnableInterpreterSlack)
    {
        WalkState->ImplicitReturnObj =
            AcpiUtCreateIntegerObject ((UINT64) 0);
        if (!WalkState->ImplicitReturnObj)
        {
            Status = AE_NO_MEMORY;
            AcpiDsDeleteWalkState (WalkState);
            goto Cleanup;
        }
    }

    /* Parse the AML */

    Status = AcpiPsParseAml (WalkState);

    /* WalkState was deleted by ParseAml */

Cleanup:
    AcpiPsDeleteParseTree (Op);

    /* Take away the extra reference that we gave the parameters above */

    AcpiPsUpdateParameterList (Info, REF_DECREMENT);

    /* Exit now if error above */

    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /*
     * If the method has returned an object, signal this to the caller with
     * a control exception code
     */
    if (Info->ReturnObject)
    {
        ACPI_DEBUG_PRINT ((ACPI_DB_PARSE, "Method returned ObjDesc=%p\n",
            Info->ReturnObject));
        ACPI_DUMP_STACK_ENTRY (Info->ReturnObject);

        Status = AE_CTRL_RETURN_VALUE;
    }

    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiNsOneCompleteParse (
    UINT32                  PassNumber,
    UINT32                  TableIndex,
    ACPI_NAMESPACE_NODE     *StartNode)
{
    ACPI_PARSE_OBJECT       *ParseRoot;
    ACPI_STATUS             Status;
    UINT32                  AmlLength;
    UINT8                   *AmlStart;
    ACPI_WALK_STATE         *WalkState;
    ACPI_TABLE_HEADER       *Table;
    ACPI_OWNER_ID           OwnerId;


    ACPI_FUNCTION_TRACE (NsOneCompleteParse);


    Status = AcpiGetTableByIndex (TableIndex, &Table);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Table must consist of at least a complete header */

    if (Table->Length < sizeof (ACPI_TABLE_HEADER))
    {
        return_ACPI_STATUS (AE_BAD_HEADER);
    }

    AmlStart = (UINT8 *) Table + sizeof (ACPI_TABLE_HEADER);
    AmlLength = Table->Length - sizeof (ACPI_TABLE_HEADER);

    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }

    /* Create and init a Root Node */

    ParseRoot = AcpiPsCreateScopeOp (AmlStart);
    if (!ParseRoot)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Create and initialize a new walk state */

    WalkState = AcpiDsCreateWalkState (OwnerId, NULL, NULL, NULL);
    if (!WalkState)
    {
        AcpiPsFreeOp (ParseRoot);
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, ParseRoot, NULL,
        AmlStart, AmlLength, NULL, (UINT8) PassNumber);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        goto Cleanup;
    }

    /* Found OSDT table, enable the namespace override feature */

    if (ACPI_COMPARE_NAME(Table->Signature, ACPI_SIG_OSDT) &&
        PassNumber == ACPI_IMODE_LOAD_PASS1)
    {
        WalkState->NamespaceOverride = TRUE;
    }

    /* StartNode is the default location to load the table  */

    if (StartNode && StartNode != AcpiGbl_RootNode)
    {
        Status = AcpiDsScopeStackPush (
            StartNode, ACPI_TYPE_METHOD, WalkState);
        if (ACPI_FAILURE (Status))
        {
            AcpiDsDeleteWalkState (WalkState);
            goto Cleanup;
        }
    }

    /* Parse the AML */

    ACPI_DEBUG_PRINT ((ACPI_DB_PARSE,
        "*PARSE* pass %u parse\n", PassNumber));
    AcpiExEnterInterpreter ();
    Status = AcpiPsParseAml (WalkState);
    AcpiExExitInterpreter ();

Cleanup:
    AcpiPsDeleteParseTree (ParseRoot);
    return_ACPI_STATUS (Status);
}

ACPI_STATUS
AcpiDsExecuteArguments (
    ACPI_NAMESPACE_NODE     *Node,
    ACPI_NAMESPACE_NODE     *ScopeNode,
    UINT32                  AmlLength,
    UINT8                   *AmlStart)
{
    ACPI_STATUS             Status;
    ACPI_PARSE_OBJECT       *Op;
    ACPI_WALK_STATE         *WalkState;
    ACPI_PARSE_OBJECT       *Arg;


    ACPI_FUNCTION_TRACE ("AcpiDsExecuteArguments");


    /*
     * Allocate a new parser op to be the root of the parsed tree
     */
    Op = AcpiPsAllocOp (AML_INT_EVAL_SUBTREE_OP);
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    /* Save the Node for use in AcpiPsParseAml */

    Op->Common.Node = ScopeNode;

    /* Create and initialize a new parser state */

    WalkState = AcpiDsCreateWalkState (TABLE_ID_DSDT, NULL, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, AmlStart,
                    AmlLength, NULL, NULL, 1);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        return_ACPI_STATUS (Status);
    }

    WalkState->ParseFlags = ACPI_PARSE_DEFERRED_OP;

    /* Pass1: Parse the entire declaration */

    Status = AcpiPsParseAml (WalkState);
    if (ACPI_FAILURE (Status))
    {
        AcpiPsDeleteParseTree (Op);
        return_ACPI_STATUS (Status);
    }

    /* Get and init the Op created above */

    Arg = Op->Common.Value.Arg;
    Op->Common.Node = Node;
    Arg->Common.Node = Node;
    AcpiPsDeleteParseTree (Op);

    /* Evaluate the address and length arguments for the Buffer Field */

    Op = AcpiPsAllocOp (AML_INT_EVAL_SUBTREE_OP);
    if (!Op)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Op->Common.Node = ScopeNode;

    /* Create and initialize a new parser state */

    WalkState = AcpiDsCreateWalkState (TABLE_ID_DSDT, NULL, NULL, NULL);
    if (!WalkState)
    {
        return_ACPI_STATUS (AE_NO_MEMORY);
    }

    Status = AcpiDsInitAmlWalk (WalkState, Op, NULL, AmlStart,
                    AmlLength, NULL, NULL, 3);
    if (ACPI_FAILURE (Status))
    {
        AcpiDsDeleteWalkState (WalkState);
        return_ACPI_STATUS (Status);
    }

    Status = AcpiPsParseAml (WalkState);
    AcpiPsDeleteParseTree (Op);
    return_ACPI_STATUS (Status);
}