Subversion Repositories Kolibri OS

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

 *

 * Module Name: exconfig - Namespace reconfiguration (Load/Unload opcodes)

 *

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

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

 *

 * 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 __EXCONFIG_C__

#include "acpi.h"

#include "accommon.h"

#include "acinterp.h"

#include "acnamesp.h"

#include "actables.h"

#include "acdispat.h"

#include "acevents.h"

#define _COMPONENT          ACPI_EXECUTER

        ACPI_MODULE_NAME    ("exconfig")

/* Local prototypes */

static ACPI_STATUS

AcpiExAddTable (

    UINT32                  TableIndex,

    ACPI_NAMESPACE_NODE     *ParentNode,

    ACPI_OPERAND_OBJECT     **DdbHandle);

static ACPI_STATUS

AcpiExRegionRead (

    ACPI_OPERAND_OBJECT     *ObjDesc,

    UINT32                  Length,

    UINT8                   *Buffer);

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

 *

 * FUNCTION:    AcpiExAddTable

 *

 * PARAMETERS:  Table               - Pointer to raw table

 *              ParentNode          - Where to load the table (scope)

 *              DdbHandle           - Where to return the table handle.

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Common function to Install and Load an ACPI table with a

 *              returned table handle.

 *

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

static ACPI_STATUS

AcpiExAddTable (

    UINT32                  TableIndex,

    ACPI_NAMESPACE_NODE     *ParentNode,

    ACPI_OPERAND_OBJECT     **DdbHandle)

{

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_STATUS             Status;

    ACPI_OWNER_ID           OwnerId;

    ACPI_FUNCTION_TRACE (ExAddTable);

    /* Create an object to be the table handle */

    ObjDesc = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_REFERENCE);

    if (!ObjDesc)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    /* Init the table handle */

    ObjDesc->Common.Flags |= AOPOBJ_DATA_VALID;

    ObjDesc->Reference.Class = ACPI_REFCLASS_TABLE;

    *DdbHandle = ObjDesc;

    /* Install the new table into the local data structures */

    ObjDesc->Reference.Value = TableIndex;

    /* Add the table to the namespace */

    Status = AcpiNsLoadTable (TableIndex, ParentNode);

    if (ACPI_FAILURE (Status))

    {

        AcpiUtRemoveReference (ObjDesc);

        *DdbHandle = NULL;

        return_ACPI_STATUS (Status);

    }

    /* Execute any module-level code that was found in the table */

    AcpiExExitInterpreter ();

    AcpiNsExecModuleCodeList ();

    AcpiExEnterInterpreter ();

    /*

     * Update GPEs for any new _Lxx/_Exx methods. Ignore errors. The host is

     * responsible for discovering any new wake GPEs by running _PRW methods

     * that may have been loaded by this table.

     */

    Status = AcpiTbGetOwnerId (TableIndex, &OwnerId);

    if (ACPI_SUCCESS (Status))

    {

        AcpiEvUpdateGpes (OwnerId);

    }

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiExLoadTableOp

 *

 * PARAMETERS:  WalkState           - Current state with operands

 *              ReturnDesc          - Where to store the return object

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load an ACPI table from the RSDT/XSDT

 *

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

ACPI_STATUS

AcpiExLoadTableOp (

    ACPI_WALK_STATE         *WalkState,

    ACPI_OPERAND_OBJECT     **ReturnDesc)

{

    ACPI_STATUS             Status;

    ACPI_OPERAND_OBJECT     **Operand = &WalkState->Operands[0];

    ACPI_NAMESPACE_NODE     *ParentNode;

    ACPI_NAMESPACE_NODE     *StartNode;

    ACPI_NAMESPACE_NODE     *ParameterNode = NULL;

    ACPI_OPERAND_OBJECT     *DdbHandle;

    ACPI_TABLE_HEADER       *Table;

    UINT32                  TableIndex;

    ACPI_FUNCTION_TRACE (ExLoadTableOp);

    /* Validate lengths for the SignatureString, OEMIDString, OEMTableID */

    if ((Operand[0]->String.Length > ACPI_NAME_SIZE) ||

        (Operand[1]->String.Length > ACPI_OEM_ID_SIZE) ||

        (Operand[2]->String.Length > ACPI_OEM_TABLE_ID_SIZE))

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    /* Find the ACPI table in the RSDT/XSDT */

    Status = AcpiTbFindTable (Operand[0]->String.Pointer,

                              Operand[1]->String.Pointer,

                              Operand[2]->String.Pointer, &TableIndex);

    if (ACPI_FAILURE (Status))

    {

        if (Status != AE_NOT_FOUND)

        {

            return_ACPI_STATUS (Status);

        }

        /* Table not found, return an Integer=0 and AE_OK */

        DdbHandle = AcpiUtCreateIntegerObject ((UINT64) 0);

        if (!DdbHandle)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        *ReturnDesc = DdbHandle;

        return_ACPI_STATUS (AE_OK);

    }

    /* Default nodes */

    StartNode = WalkState->ScopeInfo->Scope.Node;

    ParentNode = AcpiGbl_RootNode;

    /* RootPath (optional parameter) */

    if (Operand[3]->String.Length > 0)

    {

        /*

         * Find the node referenced by the RootPathString.  This is the

         * location within the namespace where the table will be loaded.

         */

        Status = AcpiNsGetNode (StartNode, Operand[3]->String.Pointer,

                    ACPI_NS_SEARCH_PARENT, &ParentNode);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

    }

    /* ParameterPath (optional parameter) */

    if (Operand[4]->String.Length > 0)

    {

        if ((Operand[4]->String.Pointer[0] != '\\') &&

            (Operand[4]->String.Pointer[0] != '^'))

        {

            /*

             * Path is not absolute, so it will be relative to the node

             * referenced by the RootPathString (or the NS root if omitted)

             */

            StartNode = ParentNode;

        }

        /* Find the node referenced by the ParameterPathString */

        Status = AcpiNsGetNode (StartNode, Operand[4]->String.Pointer,

                    ACPI_NS_SEARCH_PARENT, &ParameterNode);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

    }

    /* Load the table into the namespace */

    Status = AcpiExAddTable (TableIndex, ParentNode, &DdbHandle);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    /* Parameter Data (optional) */

    if (ParameterNode)

    {

        /* Store the parameter data into the optional parameter object */

        Status = AcpiExStore (Operand[5],

                    ACPI_CAST_PTR (ACPI_OPERAND_OBJECT, ParameterNode),

                    WalkState);

        if (ACPI_FAILURE (Status))

        {

            (void) AcpiExUnloadTable (DdbHandle);

            AcpiUtRemoveReference (DdbHandle);

            return_ACPI_STATUS (Status);

        }

    }

    Status = AcpiGetTableByIndex (TableIndex, &Table);

    if (ACPI_SUCCESS (Status))

    {

        ACPI_INFO ((AE_INFO, "Dynamic OEM Table Load:"));

        AcpiTbPrintTableHeader (0, Table);

    }

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)

    {

        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, Table,

                    AcpiGbl_TableHandlerContext);

    }

    *ReturnDesc = DdbHandle;

    return_ACPI_STATUS  (Status);

}

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

 *

 * FUNCTION:    AcpiExRegionRead

 *

 * PARAMETERS:  ObjDesc         - Region descriptor

 *              Length          - Number of bytes to read

 *              Buffer          - Pointer to where to put the data

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Read data from an operation region. The read starts from the

 *              beginning of the region.

 *

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

static ACPI_STATUS

AcpiExRegionRead (

    ACPI_OPERAND_OBJECT     *ObjDesc,

    UINT32                  Length,

    UINT8                   *Buffer)

{

    ACPI_STATUS             Status;

    UINT64                  Value;

    UINT32                  RegionOffset = 0;

    UINT32                  i;

    /* Bytewise reads */

    for (i = 0; i < Length; i++)

    {

        Status = AcpiEvAddressSpaceDispatch (ObjDesc, ACPI_READ,

                    RegionOffset, 8, &Value);

        if (ACPI_FAILURE (Status))

        {

            return (Status);

        }

        *Buffer = (UINT8) Value;

        Buffer++;

        RegionOffset++;

    }

    return (AE_OK);

}

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

 *

 * FUNCTION:    AcpiExLoadOp

 *

 * PARAMETERS:  ObjDesc         - Region or Buffer/Field where the table will be

 *                                obtained

 *              Target          - Where a handle to the table will be stored

 *              WalkState       - Current state

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Load an ACPI table from a field or operation region

 *

 * NOTE: Region Fields (Field, BankField, IndexFields) are resolved to buffer

 *       objects before this code is reached.

 *

 *       If source is an operation region, it must refer to SystemMemory, as

 *       per the ACPI specification.

 *

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

ACPI_STATUS

AcpiExLoadOp (

    ACPI_OPERAND_OBJECT     *ObjDesc,

    ACPI_OPERAND_OBJECT     *Target,

    ACPI_WALK_STATE         *WalkState)

{

    ACPI_OPERAND_OBJECT     *DdbHandle;

    ACPI_TABLE_HEADER       *Table;

    ACPI_TABLE_DESC         TableDesc;

    UINT32                  TableIndex;

    ACPI_STATUS             Status;

    UINT32                  Length;

    ACPI_FUNCTION_TRACE (ExLoadOp);

    ACPI_MEMSET (&TableDesc, 0, sizeof (ACPI_TABLE_DESC));

    /* Source Object can be either an OpRegion or a Buffer/Field */

    switch (ObjDesc->Common.Type)

    {

    case ACPI_TYPE_REGION:

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

            "Load table from Region %p\n", ObjDesc));

        /* Region must be SystemMemory (from ACPI spec) */

        if (ObjDesc->Region.SpaceId != ACPI_ADR_SPACE_SYSTEM_MEMORY)

        {

            return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

        }

        /*

         * If the Region Address and Length have not been previously evaluated,

         * evaluate them now and save the results.

         */

        if (!(ObjDesc->Common.Flags & AOPOBJ_DATA_VALID))

        {

            Status = AcpiDsGetRegionArguments (ObjDesc);

            if (ACPI_FAILURE (Status))

            {

                return_ACPI_STATUS (Status);

            }

        }

        /* Get the table header first so we can get the table length */

        Table = ACPI_ALLOCATE (sizeof (ACPI_TABLE_HEADER));

        if (!Table)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        Status = AcpiExRegionRead (ObjDesc, sizeof (ACPI_TABLE_HEADER),

                    ACPI_CAST_PTR (UINT8, Table));

        Length = Table->Length;

        ACPI_FREE (Table);

        if (ACPI_FAILURE (Status))

        {

            return_ACPI_STATUS (Status);

        }

        /* Must have at least an ACPI table header */

        if (Length < sizeof (ACPI_TABLE_HEADER))

        {

            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);

        }

        /*

         * The original implementation simply mapped the table, with no copy.

         * However, the memory region is not guaranteed to remain stable and

         * we must copy the table to a local buffer. For example, the memory

         * region is corrupted after suspend on some machines. Dynamically

         * loaded tables are usually small, so this overhead is minimal.

         *

         * The latest implementation (5/2009) does not use a mapping at all.

         * We use the low-level operation region interface to read the table

         * instead of the obvious optimization of using a direct mapping.

         * This maintains a consistent use of operation regions across the

         * entire subsystem. This is important if additional processing must

         * be performed in the (possibly user-installed) operation region

         * handler. For example, AcpiExec and ASLTS depend on this.

         */

        /* Allocate a buffer for the table */

        TableDesc.Pointer = ACPI_ALLOCATE (Length);

        if (!TableDesc.Pointer)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        /* Read the entire table */

        Status = AcpiExRegionRead (ObjDesc, Length,

                    ACPI_CAST_PTR (UINT8, TableDesc.Pointer));

        if (ACPI_FAILURE (Status))

        {

            ACPI_FREE (TableDesc.Pointer);

            return_ACPI_STATUS (Status);

        }

        TableDesc.Address = ObjDesc->Region.Address;

        break;

    case ACPI_TYPE_BUFFER: /* Buffer or resolved RegionField */

        ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,

            "Load table from Buffer or Field %p\n", ObjDesc));

        /* Must have at least an ACPI table header */

        if (ObjDesc->Buffer.Length < sizeof (ACPI_TABLE_HEADER))

        {

            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);

        }

        /* Get the actual table length from the table header */

        Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, ObjDesc->Buffer.Pointer);

        Length = Table->Length;

        /* Table cannot extend beyond the buffer */

        if (Length > ObjDesc->Buffer.Length)

        {

            return_ACPI_STATUS (AE_AML_BUFFER_LIMIT);

        }

        if (Length < sizeof (ACPI_TABLE_HEADER))

        {

            return_ACPI_STATUS (AE_INVALID_TABLE_LENGTH);

        }

        /*

         * Copy the table from the buffer because the buffer could be modified

         * or even deleted in the future

         */

        TableDesc.Pointer = ACPI_ALLOCATE (Length);

        if (!TableDesc.Pointer)

        {

            return_ACPI_STATUS (AE_NO_MEMORY);

        }

        ACPI_MEMCPY (TableDesc.Pointer, Table, Length);

        TableDesc.Address = ACPI_TO_INTEGER (TableDesc.Pointer);

        break;

    default:

        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

    }

    /* Validate table checksum (will not get validated in TbAddTable) */

    Status = AcpiTbVerifyChecksum (TableDesc.Pointer, Length);

    if (ACPI_FAILURE (Status))

    {

        ACPI_FREE (TableDesc.Pointer);

        return_ACPI_STATUS (Status);

    }

    /* Complete the table descriptor */

    TableDesc.Length = Length;

    TableDesc.Flags = ACPI_TABLE_ORIGIN_ALLOCATED;

    /* Install the new table into the local data structures */

    Status = AcpiTbAddTable (&TableDesc, &TableIndex);

    if (ACPI_FAILURE (Status))

    {

        /* Delete allocated table buffer */

        AcpiTbDeleteTable (&TableDesc);

        return_ACPI_STATUS (Status);

    }

    /*

     * Add the table to the namespace.

     *

     * Note: Load the table objects relative to the root of the namespace.

     * This appears to go against the ACPI specification, but we do it for

     * compatibility with other ACPI implementations.

     */

    Status = AcpiExAddTable (TableIndex, AcpiGbl_RootNode, &DdbHandle);

    if (ACPI_FAILURE (Status))

    {

        /* On error, TablePtr was deallocated above */

        return_ACPI_STATUS (Status);

    }

    /* Store the DdbHandle into the Target operand */

    Status = AcpiExStore (DdbHandle, Target, WalkState);

    if (ACPI_FAILURE (Status))

    {

        (void) AcpiExUnloadTable (DdbHandle);

        /* TablePtr was deallocated above */

        AcpiUtRemoveReference (DdbHandle);

        return_ACPI_STATUS (Status);

    }

    ACPI_INFO ((AE_INFO, "Dynamic OEM Table Load:"));

    AcpiTbPrintTableHeader (0, TableDesc.Pointer);

    /* Remove the reference by added by AcpiExStore above */

    AcpiUtRemoveReference (DdbHandle);

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)

    {

        (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_LOAD, TableDesc.Pointer,

                    AcpiGbl_TableHandlerContext);

    }

    return_ACPI_STATUS (Status);

}

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

 *

 * FUNCTION:    AcpiExUnloadTable

 *

 * PARAMETERS:  DdbHandle           - Handle to a previously loaded table

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Unload an ACPI table

 *

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

ACPI_STATUS

AcpiExUnloadTable (

    ACPI_OPERAND_OBJECT     *DdbHandle)

{

    ACPI_STATUS             Status = AE_OK;

    ACPI_OPERAND_OBJECT     *TableDesc = DdbHandle;

    UINT32                  TableIndex;

    ACPI_TABLE_HEADER       *Table;

    ACPI_FUNCTION_TRACE (ExUnloadTable);

    /*

     * Validate the handle

     * Although the handle is partially validated in AcpiExReconfiguration()

     * when it calls AcpiExResolveOperands(), the handle is more completely

     * validated here.

     *

     * Handle must be a valid operand object of type reference. Also, the

     * DdbHandle must still be marked valid (table has not been previously

     * unloaded)

     */

    if ((!DdbHandle) ||

        (ACPI_GET_DESCRIPTOR_TYPE (DdbHandle) != ACPI_DESC_TYPE_OPERAND) ||

        (DdbHandle->Common.Type != ACPI_TYPE_LOCAL_REFERENCE) ||

        (!(DdbHandle->Common.Flags & AOPOBJ_DATA_VALID)))

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    /* Get the table index from the DdbHandle */

    TableIndex = TableDesc->Reference.Value;

    /* Ensure the table is still loaded */

    if (!AcpiTbIsTableLoaded (TableIndex))

    {

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    /* Invoke table handler if present */

    if (AcpiGbl_TableHandler)

    {

        Status = AcpiGetTableByIndex (TableIndex, &Table);

        if (ACPI_SUCCESS (Status))

        {

            (void) AcpiGbl_TableHandler (ACPI_TABLE_EVENT_UNLOAD, Table,

                        AcpiGbl_TableHandlerContext);

        }

    }

    /* Delete the portion of the namespace owned by this table */

    Status = AcpiTbDeleteNamespaceByOwner (TableIndex);

    if (ACPI_FAILURE (Status))

    {

        return_ACPI_STATUS (Status);

    }

    (void) AcpiTbReleaseOwnerId (TableIndex);

    AcpiTbSetTableLoadedFlag (TableIndex, FALSE);

    /*

     * Invalidate the handle. We do this because the handle may be stored

     * in a named object and may not be actually deleted until much later.

     */

    DdbHandle->Common.Flags &= ~AOPOBJ_DATA_VALID;

    return_ACPI_STATUS (AE_OK);

}