exresnte.c File Reference

#include "acpi.h"
#include "accommon.h"
#include "acdispat.h"
#include "acinterp.h"
#include "acnamesp.h"

Include dependency graph for exresnte.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EXECUTER

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

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EXECUTER

Definition at line 51 of file exresnte.c.

Function Documentation

AcpiExResolveNodeToValue()

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

Definition at line 82 of file exresnte.c.

{
    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 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 [%4.4s] %p",
            Node->Name.Ascii, Node));
        return_ACPI_STATUS (AE_AML_UNINITIALIZED_NODE);
    }
 
    /*
     * 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;
            AcpiUtAddReference (ObjDesc);
        }
        break;
 
    case ACPI_TYPE_STRING:
 
        if (SourceDesc->Common.Type != ACPI_TYPE_STRING)
        {
            ACPI_ERROR ((AE_INFO, "Object not a String, type %s",
                AcpiUtGetObjectTypeName (SourceDesc)));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
 
        /* Return an additional reference to the object */
 
        ObjDesc = SourceDesc;
        AcpiUtAddReference (ObjDesc);
        break;
 
    case ACPI_TYPE_INTEGER:
 
        if (SourceDesc->Common.Type != ACPI_TYPE_INTEGER)
        {
            ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s",
                AcpiUtGetObjectTypeName (SourceDesc)));
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
 
        /* Return an additional reference to the object */
 
        ObjDesc = SourceDesc;
        AcpiUtAddReference (ObjDesc);
        break;
 
    case ACPI_TYPE_BUFFER_FIELD:
    case ACPI_TYPE_LOCAL_REGION_FIELD:
    case ACPI_TYPE_LOCAL_BANK_FIELD:
    case ACPI_TYPE_LOCAL_INDEX_FIELD:
 
        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
            "FieldRead Node=%p SourceDesc=%p Type=%X\n",
            Node, SourceDesc, EntryType));
 
        Status = AcpiExReadDataFromField (WalkState, SourceDesc, &ObjDesc);
        break;
 
    /* For these objects, just return the object attached to the Node */
 
    case ACPI_TYPE_MUTEX:
    case ACPI_TYPE_POWER:
    case ACPI_TYPE_PROCESSOR:
    case ACPI_TYPE_EVENT:
    case ACPI_TYPE_REGION:
 
        /* Return an additional reference to the object */
 
        ObjDesc = SourceDesc;
        AcpiUtAddReference (ObjDesc);
        break;
 
    /* TYPE_ANY is untyped, and thus there is no object associated with it */
 
    case ACPI_TYPE_ANY:
 
        ACPI_ERROR ((AE_INFO,
            "Untyped entry %p, no attached object!", Node));
 
        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);  /* Cannot be AE_TYPE */
 
    case ACPI_TYPE_LOCAL_REFERENCE:
 
        switch (SourceDesc->Reference.Class)
        {
        case ACPI_REFCLASS_TABLE:   /* This is a DdbHandle */
        case ACPI_REFCLASS_REFOF:
        case ACPI_REFCLASS_INDEX:
 
            /* Return an additional reference to the object */
 
            ObjDesc = SourceDesc;
            AcpiUtAddReference (ObjDesc);
            break;
 
        default:
 
            /* No named references are allowed here */
 
            ACPI_ERROR ((AE_INFO,
                "Unsupported Reference type 0x%X",
                SourceDesc->Reference.Class));
 
            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
        }
        break;
 
    default:
 
        /* Default case is for unknown types */
 
        ACPI_ERROR ((AE_INFO,
            "Node %p - Unknown object type 0x%X",
            Node, EntryType));
 
        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
 
    } /* switch (EntryType) */
 
 
    /* Return the object descriptor */
 
    *ObjectPtr = (void *) ObjDesc;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiDsResolvePackageElement(), AcpiExOpcode_1A_0T_1R(), AcpiExResolveToValue(), and AcpiNsEvaluate().