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

 *

 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init

 *

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

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

 *

 * 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 __EVRGNINI_C__

#include "acpi.h"

#include "accommon.h"

#include "acevents.h"

#include "acnamesp.h"

#define _COMPONENT          ACPI_EVENTS

        ACPI_MODULE_NAME    ("evrgnini")

/* Local prototypes */

static BOOLEAN

AcpiEvIsPciRootBridge (

    ACPI_NAMESPACE_NODE     *Node);

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

 *

 * FUNCTION:    AcpiEvSystemMemoryRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Setup a SystemMemory operation region

 *

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

ACPI_STATUS

AcpiEvSystemMemoryRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_OPERAND_OBJECT     *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle;

    ACPI_MEM_SPACE_CONTEXT  *LocalRegionContext;

    ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup);

    if (Function == ACPI_REGION_DEACTIVATE)

    {

        if (*RegionContext)

        {

            LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext;

            /* Delete a cached mapping if present */

            if (LocalRegionContext->MappedLength)

            {

                AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress,

                    LocalRegionContext->MappedLength);

            }

            ACPI_FREE (LocalRegionContext);

            *RegionContext = NULL;

        }

        return_ACPI_STATUS (AE_OK);

    }

    /* Create a new context */

    LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT));

    if (!(LocalRegionContext))

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    /* Save the region length and address for use in the handler */

    LocalRegionContext->Length  = RegionDesc->Region.Length;

    LocalRegionContext->Address = RegionDesc->Region.Address;

    *RegionContext = LocalRegionContext;

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvIoSpaceRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Setup a IO operation region

 *

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

ACPI_STATUS

AcpiEvIoSpaceRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup);

    if (Function == ACPI_REGION_DEACTIVATE)

    {

        *RegionContext = NULL;

    }

    else

    {

        *RegionContext = HandlerContext;

    }

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvPciConfigRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Setup a PCI_Config operation region

 *

 * MUTEX:       Assumes namespace is not locked

 *

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

ACPI_STATUS

AcpiEvPciConfigRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_STATUS             Status = AE_OK;

    UINT64                  PciValue;

    ACPI_PCI_ID             *PciId = *RegionContext;

    ACPI_OPERAND_OBJECT     *HandlerObj;

    ACPI_NAMESPACE_NODE     *ParentNode;

    ACPI_NAMESPACE_NODE     *PciRootNode;

    ACPI_NAMESPACE_NODE     *PciDeviceNode;

    ACPI_OPERAND_OBJECT     *RegionObj = (ACPI_OPERAND_OBJECT  *) Handle;

    ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup);

    HandlerObj = RegionObj->Region.Handler;

    if (!HandlerObj)

    {

        /*

         * No installed handler. This shouldn't happen because the dispatch

         * routine checks before we get here, but we check again just in case.

         */

        ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,

            "Attempting to init a region %p, with no handler\n", RegionObj));

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    *RegionContext = NULL;

    if (Function == ACPI_REGION_DEACTIVATE)

    {

        if (PciId)

        {

            ACPI_FREE (PciId);

        }

        return_ACPI_STATUS (Status);

    }

    ParentNode = RegionObj->Region.Node->Parent;

    /*

     * Get the _SEG and _BBN values from the device upon which the handler

     * is installed.

     *

     * We need to get the _SEG and _BBN objects relative to the PCI BUS device.

     * This is the device the handler has been registered to handle.

     */

    /*

     * If the AddressSpace.Node is still pointing to the root, we need

     * to scan upward for a PCI Root bridge and re-associate the OpRegion

     * handlers with that device.

     */

    if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode)

    {

        /* Start search from the parent object */

        PciRootNode = ParentNode;

        while (PciRootNode != AcpiGbl_RootNode)

        {

            /* Get the _HID/_CID in order to detect a RootBridge */

            if (AcpiEvIsPciRootBridge (PciRootNode))

            {

                /* Install a handler for this PCI root bridge */

                Status = AcpiInstallAddressSpaceHandler (

                            (ACPI_HANDLE) PciRootNode,

                            ACPI_ADR_SPACE_PCI_CONFIG,

                            ACPI_DEFAULT_HANDLER, NULL, NULL);

                if (ACPI_FAILURE (Status))

                {

                    if (Status == AE_SAME_HANDLER)

                    {

                        /*

                         * It is OK if the handler is already installed on the

                         * root bridge. Still need to return a context object

                         * for the new PCI_Config operation region, however.

                         */

                        Status = AE_OK;

                    }

                    else

                    {

                        ACPI_EXCEPTION ((AE_INFO, Status,

                            "Could not install PciConfig handler "

                            "for Root Bridge %4.4s",

                            AcpiUtGetNodeName (PciRootNode)));

                    }

                }

                break;

            }

            PciRootNode = PciRootNode->Parent;

        }

        /* PCI root bridge not found, use namespace root node */

    }

    else

    {

        PciRootNode = HandlerObj->AddressSpace.Node;

    }

    /*

     * If this region is now initialized, we are done.

     * (InstallAddressSpaceHandler could have initialized it)

     */

    if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)

    {

        return_ACPI_STATUS (AE_OK);

    }

    /* Region is still not initialized. Create a new context */

    PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID));

    if (!PciId)

    {

        return_ACPI_STATUS (AE_NO_MEMORY);

    }

    /*

     * For PCI_Config space access, we need the segment, bus, device and

     * function numbers. Acquire them here.

     *

     * Find the parent device object. (This allows the operation region to be

     * within a subscope under the device, such as a control method.)

     */

    PciDeviceNode = RegionObj->Region.Node;

    while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE))

    {

        PciDeviceNode = PciDeviceNode->Parent;

    }

    if (!PciDeviceNode)

    {

        ACPI_FREE (PciId);

        return_ACPI_STATUS (AE_AML_OPERAND_TYPE);

    }

    /*

     * Get the PCI device and function numbers from the _ADR object

     * contained in the parent's scope.

     */

    Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR,

                PciDeviceNode, &PciValue);

    /*

     * The default is zero, and since the allocation above zeroed the data,

     * just do nothing on failure.

     */

    if (ACPI_SUCCESS (Status))

    {

        PciId->Device   = ACPI_HIWORD (ACPI_LODWORD (PciValue));

        PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue));

    }

    /* The PCI segment number comes from the _SEG method */

    Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG,

                PciRootNode, &PciValue);

    if (ACPI_SUCCESS (Status))

    {

        PciId->Segment = ACPI_LOWORD (PciValue);

    }

    /* The PCI bus number comes from the _BBN method */

    Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN,

                PciRootNode, &PciValue);

    if (ACPI_SUCCESS (Status))

    {

        PciId->Bus = ACPI_LOWORD (PciValue);

    }

    /* Complete/update the PCI ID for this device */

    Status = AcpiHwDerivePciId (PciId, PciRootNode, RegionObj->Region.Node);

    if (ACPI_FAILURE (Status))

    {

        ACPI_FREE (PciId);

        return_ACPI_STATUS (Status);

    }

    *RegionContext = PciId;

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvIsPciRootBridge

 *

 * PARAMETERS:  Node            - Device node being examined

 *

 * RETURN:      TRUE if device is a PCI/PCI-Express Root Bridge

 *

 * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by

 *              examining the _HID and _CID for the device.

 *

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

static BOOLEAN

AcpiEvIsPciRootBridge (

    ACPI_NAMESPACE_NODE     *Node)

{

    ACPI_STATUS             Status;

    ACPI_DEVICE_ID          *Hid;

    ACPI_DEVICE_ID_LIST     *Cid;

    UINT32                  i;

    BOOLEAN                 Match;

    /* Get the _HID and check for a PCI Root Bridge */

    Status = AcpiUtExecute_HID (Node, &Hid);

    if (ACPI_FAILURE (Status))

    {

        return (FALSE);

    }

    Match = AcpiUtIsPciRootBridge (Hid->String);

    ACPI_FREE (Hid);

    if (Match)

    {

        return (TRUE);

    }

    /* The _HID did not match. Get the _CID and check for a PCI Root Bridge */

    Status = AcpiUtExecute_CID (Node, &Cid);

    if (ACPI_FAILURE (Status))

    {

        return (FALSE);

    }

    /* Check all _CIDs in the returned list */

    for (i = 0; i < Cid->Count; i++)

    {

        if (AcpiUtIsPciRootBridge (Cid->Ids[i].String))

        {

            ACPI_FREE (Cid);

            return (TRUE);

        }

    }

    ACPI_FREE (Cid);

    return (FALSE);

}

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

 *

 * FUNCTION:    AcpiEvPciBarRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Setup a PciBAR operation region

 *

 * MUTEX:       Assumes namespace is not locked

 *

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

ACPI_STATUS

AcpiEvPciBarRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_FUNCTION_TRACE (EvPciBarRegionSetup);

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvCmosRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Setup a CMOS operation region

 *

 * MUTEX:       Assumes namespace is not locked

 *

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

ACPI_STATUS

AcpiEvCmosRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_FUNCTION_TRACE (EvCmosRegionSetup);

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvDefaultRegionSetup

 *

 * PARAMETERS:  Handle              - Region we are interested in

 *              Function            - Start or stop

 *              HandlerContext      - Address space handler context

 *              RegionContext       - Region specific context

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Default region initialization

 *

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

ACPI_STATUS

AcpiEvDefaultRegionSetup (

    ACPI_HANDLE             Handle,

    UINT32                  Function,

    void                    *HandlerContext,

    void                    **RegionContext)

{

    ACPI_FUNCTION_TRACE (EvDefaultRegionSetup);

    if (Function == ACPI_REGION_DEACTIVATE)

    {

        *RegionContext = NULL;

    }

    else

    {

        *RegionContext = HandlerContext;

    }

    return_ACPI_STATUS (AE_OK);

}

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

 *

 * FUNCTION:    AcpiEvInitializeRegion

 *

 * PARAMETERS:  RegionObj       - Region we are initializing

 *              AcpiNsLocked    - Is namespace locked?

 *

 * RETURN:      Status

 *

 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them

 *              for execution at a later time

 *

 *              Get the appropriate address space handler for a newly

 *              created region.

 *

 *              This also performs address space specific initialization. For

 *              example, PCI regions must have an _ADR object that contains

 *              a PCI address in the scope of the definition. This address is

 *              required to perform an access to PCI config space.

 *

 * MUTEX:       Interpreter should be unlocked, because we may run the _REG

 *              method for this region.

 *

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

ACPI_STATUS

AcpiEvInitializeRegion (

    ACPI_OPERAND_OBJECT     *RegionObj,

    BOOLEAN                 AcpiNsLocked)

{

    ACPI_OPERAND_OBJECT     *HandlerObj;

    ACPI_OPERAND_OBJECT     *ObjDesc;

    ACPI_ADR_SPACE_TYPE     SpaceId;

    ACPI_NAMESPACE_NODE     *Node;

    ACPI_STATUS             Status;

    ACPI_NAMESPACE_NODE     *MethodNode;

    ACPI_NAME               *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG;

    ACPI_OPERAND_OBJECT     *RegionObj2;

    ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked);

    if (!RegionObj)

    {

        return_ACPI_STATUS (AE_BAD_PARAMETER);

    }

    if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED)

    {

        return_ACPI_STATUS (AE_OK);

    }

    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);

    if (!RegionObj2)

    {

        return_ACPI_STATUS (AE_NOT_EXIST);

    }

    Node = RegionObj->Region.Node->Parent;

    SpaceId = RegionObj->Region.SpaceId;

    /* Setup defaults */

    RegionObj->Region.Handler = NULL;

    RegionObj2->Extra.Method_REG = NULL;

    RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE);

    RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED;

    /* Find any "_REG" method associated with this region definition */

    Status = AcpiNsSearchOneScope (

                *RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode);

    if (ACPI_SUCCESS (Status))

    {

        /*

         * The _REG method is optional and there can be only one per region

         * definition. This will be executed when the handler is attached

         * or removed

         */

        RegionObj2->Extra.Method_REG = MethodNode;

    }

    /*

     * The following loop depends upon the root Node having no parent

     * ie: AcpiGbl_RootNode->ParentEntry being set to NULL

     */

    while (Node)

    {

        /* Check to see if a handler exists */

        HandlerObj = NULL;

        ObjDesc = AcpiNsGetAttachedObject (Node);

        if (ObjDesc)

        {

            /* Can only be a handler if the object exists */

            switch (Node->Type)

            {

            case ACPI_TYPE_DEVICE:

                HandlerObj = ObjDesc->Device.Handler;

                break;

            case ACPI_TYPE_PROCESSOR:

                HandlerObj = ObjDesc->Processor.Handler;

                break;

            case ACPI_TYPE_THERMAL:

                HandlerObj = ObjDesc->ThermalZone.Handler;

                break;

            case ACPI_TYPE_METHOD:

                /*

                 * If we are executing module level code, the original

                 * Node's object was replaced by this Method object and we

                 * saved the handler in the method object.

                 *

                 * See AcpiNsExecModuleCode

                 */

                if (ObjDesc->Method.InfoFlags & ACPI_METHOD_MODULE_LEVEL)

                {

                    HandlerObj = ObjDesc->Method.Dispatch.Handler;

                }

                break;

            default:

                /* Ignore other objects */

                break;

            }

            while (HandlerObj)

            {

                /* Is this handler of the correct type? */

                if (HandlerObj->AddressSpace.SpaceId == SpaceId)

                {

                    /* Found correct handler */

                    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,

                        "Found handler %p for region %p in obj %p\n",

                        HandlerObj, RegionObj, ObjDesc));

                    Status = AcpiEvAttachRegion (HandlerObj, RegionObj,

                                AcpiNsLocked);

                    /*

                     * Tell all users that this region is usable by

                     * running the _REG method

                     */

                    if (AcpiNsLocked)

                    {

                        Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);

                        if (ACPI_FAILURE (Status))

                        {

                            return_ACPI_STATUS (Status);

                        }

                    }

                    Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_CONNECT);

                    if (AcpiNsLocked)

                    {

                        Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);

                        if (ACPI_FAILURE (Status))

                        {

                            return_ACPI_STATUS (Status);

                        }

                    }

                    return_ACPI_STATUS (AE_OK);

                }

                /* Try next handler in the list */

                HandlerObj = HandlerObj->AddressSpace.Next;

            }

        }

        /* This node does not have the handler we need; Pop up one level */

        Node = Node->Parent;

    }

    /* If we get here, there is no handler for this region */

    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,

        "No handler for RegionType %s(%X) (RegionObj %p)\n",

        AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj));

    return_ACPI_STATUS (AE_NOT_EXIST);

}