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 *

 * Module Name: exresnte - AML Interpreter object resolution

 *

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

 *

 * 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.

 *

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

#include "accommon.h"

#include "acdispat.h"

#include "acinterp.h"

#include "acnamesp.h"

        ACPI_MODULE_NAME    ("exresnte")

 *

 * FUNCTION:    AcpiExResolveNodeToValue

 *

 * PARAMETERS:  ObjectPtr       - Pointer to a location that contains

 *                                a pointer to a NS node, and will receive a

 *                                pointer to the resolved object.

 *              WalkState       - Current state.  Valid only if executing AML

 *                                code.  NULL if simply resolving an object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Resolve a Namespace node to a valued object

 *

 * Note: for some of the data types, the pointer attached to the Node

 * can be either a pointer to an actual internal object or a pointer into the

 * AML stream itself.  These types are currently:

 *

 *      ACPI_TYPE_INTEGER

 *      ACPI_TYPE_STRING

 *      ACPI_TYPE_BUFFER

 *      ACPI_TYPE_MUTEX

 *      ACPI_TYPE_PACKAGE

 *

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

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;

     * 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);

         Node, SourceDesc, AcpiUtGetTypeName (EntryType)));

        (EntryType == ACPI_TYPE_LOCAL_METHOD_ALIAS))

    {

        /* There is always exactly one level of indirection */

        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);

    }

    {

        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:

        {

            ACPI_ERROR ((AE_INFO, "Object not a Package, type %s",

                AcpiUtGetObjectTypeName (SourceDesc)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

        if (ACPI_SUCCESS (Status))

        {

            /* Return an additional reference to the object */

            AcpiUtAddReference (ObjDesc);

        }

        break;

        {

            ACPI_ERROR ((AE_INFO, "Object not a Buffer, type %s",

                AcpiUtGetObjectTypeName (SourceDesc)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

        if (ACPI_SUCCESS (Status))

        {

            /* Return an additional reference to the object */

            AcpiUtAddReference (ObjDesc);

        }

        break;

        {

            ACPI_ERROR ((AE_INFO, "Object not a String, type %s",

                AcpiUtGetObjectTypeName (SourceDesc)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

        AcpiUtAddReference (ObjDesc);

        break;

        {

            ACPI_ERROR ((AE_INFO, "Object not a Integer, type %s",

                AcpiUtGetObjectTypeName (SourceDesc)));

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

        AcpiUtAddReference (ObjDesc);

        break;

    case ACPI_TYPE_LOCAL_REGION_FIELD:

    case ACPI_TYPE_LOCAL_BANK_FIELD:

    case ACPI_TYPE_LOCAL_INDEX_FIELD:

            "FieldRead Node=%p SourceDesc=%p Type=%X\n",

            Node, SourceDesc, EntryType));

        break;

    case ACPI_TYPE_POWER:

    case ACPI_TYPE_PROCESSOR:

    case ACPI_TYPE_EVENT:

    case ACPI_TYPE_REGION:

        AcpiUtAddReference (ObjDesc);

        break;

            "Untyped entry %p, no attached object!", Node));

        {

        case ACPI_REFCLASS_TABLE:   /* This is a DdbHandle */

        case ACPI_REFCLASS_REFOF:

        case ACPI_REFCLASS_INDEX:

            AcpiUtAddReference (ObjDesc);

            break;

            /* No named references are allowed here */

                "Unsupported Reference type 0x%X",

                SourceDesc->Reference.Class));

        }

        break;

            "Node %p - Unknown object type 0x%X",

            Node, EntryType));

    return_ACPI_STATUS (Status);

}