Merge ACPICA 20120215.

1 files changed, 1366 insertions, 0 deletions

diff --git a/sys/contrib/dev/acpica/components/events/evregion.c b/sys/contrib/dev/acpica/components/events/evregion.c
new file mode 100644
index 0000000..d149181
--- /dev/null
+++ b/sys/contrib/dev/acpica/components/events/evregion.c
@@ -0,0 +1,1366 @@
+/******************************************************************************
+ *
+ * Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2012, Intel Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGES.
+ */
+
+
+#define __EVREGION_C__
+
+#include <contrib/dev/acpica/include/acpi.h>
+#include <contrib/dev/acpica/include/accommon.h>
+#include <contrib/dev/acpica/include/acevents.h>
+#include <contrib/dev/acpica/include/acnamesp.h>
+#include <contrib/dev/acpica/include/acinterp.h>
+
+#define _COMPONENT          ACPI_EVENTS
+        ACPI_MODULE_NAME    ("evregion")
+
+
+/* Local prototypes */
+
+static BOOLEAN
+AcpiEvHasDefaultHandler (
+    ACPI_NAMESPACE_NODE     *Node,
+    ACPI_ADR_SPACE_TYPE     SpaceId);
+
+static void
+AcpiEvOrphanEcRegMethod (
+    void);
+
+static ACPI_STATUS
+AcpiEvRegRun (
+    ACPI_HANDLE             ObjHandle,
+    UINT32                  Level,
+    void                    *Context,
+    void                    **ReturnValue);
+
+static ACPI_STATUS
+AcpiEvInstallHandler (
+    ACPI_HANDLE             ObjHandle,
+    UINT32                  Level,
+    void                    *Context,
+    void                    **ReturnValue);
+
+/* These are the address spaces that will get default handlers */
+
+#define ACPI_NUM_DEFAULT_SPACES     4
+
+static UINT8        AcpiGbl_DefaultAddressSpaces[ACPI_NUM_DEFAULT_SPACES] =
+{
+    ACPI_ADR_SPACE_SYSTEM_MEMORY,
+    ACPI_ADR_SPACE_SYSTEM_IO,
+    ACPI_ADR_SPACE_PCI_CONFIG,
+    ACPI_ADR_SPACE_DATA_TABLE
+};
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInstallRegionHandlers
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Installs the core subsystem default address space handlers.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvInstallRegionHandlers (
+    void)
+{
+    ACPI_STATUS             Status;
+    UINT32                  i;
+
+
+    ACPI_FUNCTION_TRACE (EvInstallRegionHandlers);
+
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /*
+     * All address spaces (PCI Config, EC, SMBus) are scope dependent and
+     * registration must occur for a specific device.
+     *
+     * In the case of the system memory and IO address spaces there is
+     * currently no device associated with the address space. For these we
+     * use the root.
+     *
+     * We install the default PCI config space handler at the root so that
+     * this space is immediately available even though the we have not
+     * enumerated all the PCI Root Buses yet. This is to conform to the ACPI
+     * specification which states that the PCI config space must be always
+     * available -- even though we are nowhere near ready to find the PCI root
+     * buses at this point.
+     *
+     * NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
+     * has already been installed (via AcpiInstallAddressSpaceHandler).
+     * Similar for AE_SAME_HANDLER.
+     */
+    for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
+    {
+        Status = AcpiEvInstallSpaceHandler (AcpiGbl_RootNode,
+                    AcpiGbl_DefaultAddressSpaces[i],
+                    ACPI_DEFAULT_HANDLER, NULL, NULL);
+        switch (Status)
+        {
+        case AE_OK:
+        case AE_SAME_HANDLER:
+        case AE_ALREADY_EXISTS:
+
+            /* These exceptions are all OK */
+
+            Status = AE_OK;
+            break;
+
+        default:
+
+            goto UnlockAndExit;
+        }
+    }
+
+UnlockAndExit:
+    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvHasDefaultHandler
+ *
+ * PARAMETERS:  Node                - Namespace node for the device
+ *              SpaceId             - The address space ID
+ *
+ * RETURN:      TRUE if default handler is installed, FALSE otherwise
+ *
+ * DESCRIPTION: Check if the default handler is installed for the requested
+ *              space ID.
+ *
+ ******************************************************************************/
+
+static BOOLEAN
+AcpiEvHasDefaultHandler (
+    ACPI_NAMESPACE_NODE     *Node,
+    ACPI_ADR_SPACE_TYPE     SpaceId)
+{
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+
+
+    /* Must have an existing internal object */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (ObjDesc)
+    {
+        HandlerObj = ObjDesc->Device.Handler;
+
+        /* Walk the linked list of handlers for this object */
+
+        while (HandlerObj)
+        {
+            if (HandlerObj->AddressSpace.SpaceId == SpaceId)
+            {
+                if (HandlerObj->AddressSpace.HandlerFlags &
+                        ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
+                {
+                    return (TRUE);
+                }
+            }
+
+            HandlerObj = HandlerObj->AddressSpace.Next;
+        }
+    }
+
+    return (FALSE);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInitializeOpRegions
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute _REG methods for all Operation Regions that have
+ *              an installed default region handler.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvInitializeOpRegions (
+    void)
+{
+    ACPI_STATUS             Status;
+    UINT32                  i;
+
+
+    ACPI_FUNCTION_TRACE (EvInitializeOpRegions);
+
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+    if (ACPI_FAILURE (Status))
+    {
+        return_ACPI_STATUS (Status);
+    }
+
+    /* Run the _REG methods for OpRegions in each default address space */
+
+    for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
+    {
+        /*
+         * Make sure the installed handler is the DEFAULT handler. If not the
+         * default, the _REG methods will have already been run (when the
+         * handler was installed)
+         */
+        if (AcpiEvHasDefaultHandler (AcpiGbl_RootNode,
+               AcpiGbl_DefaultAddressSpaces[i]))
+        {
+            Status = AcpiEvExecuteRegMethods (AcpiGbl_RootNode,
+                        AcpiGbl_DefaultAddressSpaces[i]);
+        }
+    }
+
+    AcpiGbl_RegMethodsExecuted = TRUE;
+
+    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvExecuteRegMethod
+ *
+ * PARAMETERS:  RegionObj           - Region object
+ *              Function            - Passed to _REG: On (1) or Off (0)
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Execute _REG method for a region
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvExecuteRegMethod (
+    ACPI_OPERAND_OBJECT     *RegionObj,
+    UINT32                  Function)
+{
+    ACPI_EVALUATE_INFO      *Info;
+    ACPI_OPERAND_OBJECT     *Args[3];
+    ACPI_OPERAND_OBJECT     *RegionObj2;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
+
+
+    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
+    if (!RegionObj2)
+    {
+        return_ACPI_STATUS (AE_NOT_EXIST);
+    }
+
+    if (RegionObj2->Extra.Method_REG == NULL)
+    {
+        return_ACPI_STATUS (AE_OK);
+    }
+
+    /* Allocate and initialize the evaluation information block */
+
+    Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
+    if (!Info)
+    {
+        return_ACPI_STATUS (AE_NO_MEMORY);
+    }
+
+    Info->PrefixNode = RegionObj2->Extra.Method_REG;
+    Info->Pathname = NULL;
+    Info->Parameters = Args;
+    Info->Flags = ACPI_IGNORE_RETURN_VALUE;
+
+    /*
+     * The _REG method has two arguments:
+     *
+     * Arg0 - Integer:
+     *  Operation region space ID Same value as RegionObj->Region.SpaceId
+     *
+     * Arg1 - Integer:
+     *  connection status 1 for connecting the handler, 0 for disconnecting
+     *  the handler (Passed as a parameter)
+     */
+    Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
+    if (!Args[0])
+    {
+        Status = AE_NO_MEMORY;
+        goto Cleanup1;
+    }
+
+    Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
+    if (!Args[1])
+    {
+        Status = AE_NO_MEMORY;
+        goto Cleanup2;
+    }
+
+    Args[2] = NULL; /* Terminate list */
+
+    /* Execute the method, no return value */
+
+    ACPI_DEBUG_EXEC (
+        AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
+
+    Status = AcpiNsEvaluate (Info);
+    AcpiUtRemoveReference (Args[1]);
+
+Cleanup2:
+    AcpiUtRemoveReference (Args[0]);
+
+Cleanup1:
+    ACPI_FREE (Info);
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvAddressSpaceDispatch
+ *
+ * PARAMETERS:  RegionObj           - Internal region object
+ *              FieldObj            - Corresponding field. Can be NULL.
+ *              Function            - Read or Write operation
+ *              RegionOffset        - Where in the region to read or write
+ *              BitWidth            - Field width in bits (8, 16, 32, or 64)
+ *              Value               - Pointer to in or out value, must be
+ *                                    a full 64-bit integer
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Dispatch an address space or operation region access to
+ *              a previously installed handler.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvAddressSpaceDispatch (
+    ACPI_OPERAND_OBJECT     *RegionObj,
+    ACPI_OPERAND_OBJECT     *FieldObj,
+    UINT32                  Function,
+    UINT32                  RegionOffset,
+    UINT32                  BitWidth,
+    UINT64                  *Value)
+{
+    ACPI_STATUS             Status;
+    ACPI_ADR_SPACE_HANDLER  Handler;
+    ACPI_ADR_SPACE_SETUP    RegionSetup;
+    ACPI_OPERAND_OBJECT     *HandlerDesc;
+    ACPI_OPERAND_OBJECT     *RegionObj2;
+    void                    *RegionContext = NULL;
+    ACPI_CONNECTION_INFO    *Context;
+
+
+    ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
+
+
+    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
+    if (!RegionObj2)
+    {
+        return_ACPI_STATUS (AE_NOT_EXIST);
+    }
+
+    /* Ensure that there is a handler associated with this region */
+
+    HandlerDesc = RegionObj->Region.Handler;
+    if (!HandlerDesc)
+    {
+        ACPI_ERROR ((AE_INFO,
+            "No handler for Region [%4.4s] (%p) [%s]",
+            AcpiUtGetNodeName (RegionObj->Region.Node),
+            RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+
+        return_ACPI_STATUS (AE_NOT_EXIST);
+    }
+
+    Context = HandlerDesc->AddressSpace.Context;
+
+    /*
+     * It may be the case that the region has never been initialized.
+     * Some types of regions require special init code
+     */
+    if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
+    {
+        /* This region has not been initialized yet, do it */
+
+        RegionSetup = HandlerDesc->AddressSpace.Setup;
+        if (!RegionSetup)
+        {
+            /* No initialization routine, exit with error */
+
+            ACPI_ERROR ((AE_INFO,
+                "No init routine for region(%p) [%s]",
+                RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+            return_ACPI_STATUS (AE_NOT_EXIST);
+        }
+
+        /*
+         * We must exit the interpreter because the region setup will
+         * potentially execute control methods (for example, the _REG method
+         * for this region)
+         */
+        AcpiExExitInterpreter ();
+
+        Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
+                    Context, &RegionContext);
+
+        /* Re-enter the interpreter */
+
+        AcpiExEnterInterpreter ();
+
+        /* Check for failure of the Region Setup */
+
+        if (ACPI_FAILURE (Status))
+        {
+            ACPI_EXCEPTION ((AE_INFO, Status,
+                "During region initialization: [%s]",
+                AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+            return_ACPI_STATUS (Status);
+        }
+
+        /* Region initialization may have been completed by RegionSetup */
+
+        if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
+        {
+            RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
+
+            if (RegionObj2->Extra.RegionContext)
+            {
+                /* The handler for this region was already installed */
+
+                ACPI_FREE (RegionContext);
+            }
+            else
+            {
+                /*
+                 * Save the returned context for use in all accesses to
+                 * this particular region
+                 */
+                RegionObj2->Extra.RegionContext = RegionContext;
+            }
+        }
+    }
+
+    /* We have everything we need, we can invoke the address space handler */
+
+    Handler = HandlerDesc->AddressSpace.Handler;
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
+        &RegionObj->Region.Handler->AddressSpace, Handler,
+        ACPI_FORMAT_NATIVE_UINT (RegionObj->Region.Address + RegionOffset),
+        AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+
+
+    /*
+     * Special handling for GenericSerialBus and GeneralPurposeIo:
+     * There are three extra parameters that must be passed to the
+     * handler via the context:
+     *   1) Connection buffer, a resource template from Connection() op.
+     *   2) Length of the above buffer.
+     *   3) Actual access length from the AccessAs() op.
+     */
+    if (((RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GSBUS) ||
+            (RegionObj->Region.SpaceId == ACPI_ADR_SPACE_GPIO)) &&
+        Context &&
+        FieldObj)
+    {
+        /* Get the Connection (ResourceTemplate) buffer */
+
+        Context->Connection = FieldObj->Field.ResourceBuffer;
+        Context->Length = FieldObj->Field.ResourceLength;
+        Context->AccessLength = FieldObj->Field.AccessLength;
+    }
+
+    if (!(HandlerDesc->AddressSpace.HandlerFlags &
+            ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
+    {
+        /*
+         * For handlers other than the default (supplied) handlers, we must
+         * exit the interpreter because the handler *might* block -- we don't
+         * know what it will do, so we can't hold the lock on the intepreter.
+         */
+        AcpiExExitInterpreter();
+    }
+
+    /* Call the handler */
+
+    Status = Handler (Function,
+        (RegionObj->Region.Address + RegionOffset), BitWidth, Value,
+        Context, RegionObj2->Extra.RegionContext);
+
+    if (ACPI_FAILURE (Status))
+    {
+        ACPI_EXCEPTION ((AE_INFO, Status, "Returned by Handler for [%s]",
+            AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+    }
+
+    if (!(HandlerDesc->AddressSpace.HandlerFlags &
+            ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
+    {
+        /*
+         * We just returned from a non-default handler, we must re-enter the
+         * interpreter
+         */
+       AcpiExEnterInterpreter ();
+    }
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvDetachRegion
+ *
+ * PARAMETERS:  RegionObj           - Region Object
+ *              AcpiNsIsLocked      - Namespace Region Already Locked?
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Break the association between the handler and the region
+ *              this is a two way association.
+ *
+ ******************************************************************************/
+
+void
+AcpiEvDetachRegion(
+    ACPI_OPERAND_OBJECT     *RegionObj,
+    BOOLEAN                 AcpiNsIsLocked)
+{
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_OPERAND_OBJECT     **LastObjPtr;
+    ACPI_ADR_SPACE_SETUP    RegionSetup;
+    void                    **RegionContext;
+    ACPI_OPERAND_OBJECT     *RegionObj2;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (EvDetachRegion);
+
+
+    RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
+    if (!RegionObj2)
+    {
+        return_VOID;
+    }
+    RegionContext = &RegionObj2->Extra.RegionContext;
+
+    /* Get the address handler from the region object */
+
+    HandlerObj = RegionObj->Region.Handler;
+    if (!HandlerObj)
+    {
+        /* This region has no handler, all done */
+
+        return_VOID;
+    }
+
+    /* Find this region in the handler's list */
+
+    ObjDesc = HandlerObj->AddressSpace.RegionList;
+    LastObjPtr = &HandlerObj->AddressSpace.RegionList;
+
+    while (ObjDesc)
+    {
+        /* Is this the correct Region? */
+
+        if (ObjDesc == RegionObj)
+        {
+            ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+                "Removing Region %p from address handler %p\n",
+                RegionObj, HandlerObj));
+
+            /* This is it, remove it from the handler's list */
+
+            *LastObjPtr = ObjDesc->Region.Next;
+            ObjDesc->Region.Next = NULL;        /* Must clear field */
+
+            if (AcpiNsIsLocked)
+            {
+                Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+                if (ACPI_FAILURE (Status))
+                {
+                    return_VOID;
+                }
+            }
+
+            /* Now stop region accesses by executing the _REG method */
+
+            Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_DISCONNECT);
+            if (ACPI_FAILURE (Status))
+            {
+                ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]",
+                    AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+            }
+
+            if (AcpiNsIsLocked)
+            {
+                Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+                if (ACPI_FAILURE (Status))
+                {
+                    return_VOID;
+                }
+            }
+
+            /*
+             * If the region has been activated, call the setup handler with
+             * the deactivate notification
+             */
+            if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
+            {
+                RegionSetup = HandlerObj->AddressSpace.Setup;
+                Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
+                    HandlerObj->AddressSpace.Context, RegionContext);
+
+                /* Init routine may fail, Just ignore errors */
+
+                if (ACPI_FAILURE (Status))
+                {
+                    ACPI_EXCEPTION ((AE_INFO, Status,
+                        "from region handler - deactivate, [%s]",
+                        AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+                }
+
+                RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
+            }
+
+            /*
+             * Remove handler reference in the region
+             *
+             * NOTE: this doesn't mean that the region goes away, the region
+             * is just inaccessible as indicated to the _REG method
+             *
+             * If the region is on the handler's list, this must be the
+             * region's handler
+             */
+            RegionObj->Region.Handler = NULL;
+            AcpiUtRemoveReference (HandlerObj);
+
+            return_VOID;
+        }
+
+        /* Walk the linked list of handlers */
+
+        LastObjPtr = &ObjDesc->Region.Next;
+        ObjDesc = ObjDesc->Region.Next;
+    }
+
+    /* If we get here, the region was not in the handler's region list */
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Cannot remove region %p from address handler %p\n",
+        RegionObj, HandlerObj));
+
+    return_VOID;
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvAttachRegion
+ *
+ * PARAMETERS:  HandlerObj          - Handler Object
+ *              RegionObj           - Region Object
+ *              AcpiNsIsLocked      - Namespace Region Already Locked?
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Create the association between the handler and the region
+ *              this is a two way association.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvAttachRegion (
+    ACPI_OPERAND_OBJECT     *HandlerObj,
+    ACPI_OPERAND_OBJECT     *RegionObj,
+    BOOLEAN                 AcpiNsIsLocked)
+{
+
+    ACPI_FUNCTION_TRACE (EvAttachRegion);
+
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Adding Region [%4.4s] %p to address handler %p [%s]\n",
+        AcpiUtGetNodeName (RegionObj->Region.Node),
+        RegionObj, HandlerObj,
+        AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
+
+    /* Link this region to the front of the handler's list */
+
+    RegionObj->Region.Next = HandlerObj->AddressSpace.RegionList;
+    HandlerObj->AddressSpace.RegionList = RegionObj;
+
+    /* Install the region's handler */
+
+    if (RegionObj->Region.Handler)
+    {
+        return_ACPI_STATUS (AE_ALREADY_EXISTS);
+    }
+
+    RegionObj->Region.Handler = HandlerObj;
+    AcpiUtAddReference (HandlerObj);
+
+    return_ACPI_STATUS (AE_OK);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInstallHandler
+ *
+ * PARAMETERS:  WalkNamespace callback
+ *
+ * DESCRIPTION: This routine installs an address handler into objects that are
+ *              of type Region or Device.
+ *
+ *              If the Object is a Device, and the device has a handler of
+ *              the same type then the search is terminated in that branch.
+ *
+ *              This is because the existing handler is closer in proximity
+ *              to any more regions than the one we are trying to install.
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiEvInstallHandler (
+    ACPI_HANDLE             ObjHandle,
+    UINT32                  Level,
+    void                    *Context,
+    void                    **ReturnValue)
+{
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+    ACPI_OPERAND_OBJECT     *NextHandlerObj;
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_NAMESPACE_NODE     *Node;
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_NAME (EvInstallHandler);
+
+
+    HandlerObj = (ACPI_OPERAND_OBJECT  *) Context;
+
+    /* Parameter validation */
+
+    if (!HandlerObj)
+    {
+        return (AE_OK);
+    }
+
+    /* Convert and validate the device handle */
+
+    Node = AcpiNsValidateHandle (ObjHandle);
+    if (!Node)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /*
+     * We only care about regions and objects that are allowed to have
+     * address space handlers
+     */
+    if ((Node->Type != ACPI_TYPE_DEVICE) &&
+        (Node->Type != ACPI_TYPE_REGION) &&
+        (Node != AcpiGbl_RootNode))
+    {
+        return (AE_OK);
+    }
+
+    /* Check for an existing internal object */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (!ObjDesc)
+    {
+        /* No object, just exit */
+
+        return (AE_OK);
+    }
+
+    /* Devices are handled different than regions */
+
+    if (ObjDesc->Common.Type == ACPI_TYPE_DEVICE)
+    {
+        /* Check if this Device already has a handler for this address space */
+
+        NextHandlerObj = ObjDesc->Device.Handler;
+        while (NextHandlerObj)
+        {
+            /* Found a handler, is it for the same address space? */
+
+            if (NextHandlerObj->AddressSpace.SpaceId ==
+                    HandlerObj->AddressSpace.SpaceId)
+            {
+                ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+                    "Found handler for region [%s] in device %p(%p) "
+                    "handler %p\n",
+                    AcpiUtGetRegionName (HandlerObj->AddressSpace.SpaceId),
+                    ObjDesc, NextHandlerObj, HandlerObj));
+
+                /*
+                 * Since the object we found it on was a device, then it
+                 * means that someone has already installed a handler for
+                 * the branch of the namespace from this device on. Just
+                 * bail out telling the walk routine to not traverse this
+                 * branch. This preserves the scoping rule for handlers.
+                 */
+                return (AE_CTRL_DEPTH);
+            }
+
+            /* Walk the linked list of handlers attached to this device */
+
+            NextHandlerObj = NextHandlerObj->AddressSpace.Next;
+        }
+
+        /*
+         * As long as the device didn't have a handler for this space we
+         * don't care about it. We just ignore it and proceed.
+         */
+        return (AE_OK);
+    }
+
+    /* Object is a Region */
+
+    if (ObjDesc->Region.SpaceId != HandlerObj->AddressSpace.SpaceId)
+    {
+        /* This region is for a different address space, just ignore it */
+
+        return (AE_OK);
+    }
+
+    /*
+     * Now we have a region and it is for the handler's address space type.
+     *
+     * First disconnect region for any previous handler (if any)
+     */
+    AcpiEvDetachRegion (ObjDesc, FALSE);
+
+    /* Connect the region to the new handler */
+
+    Status = AcpiEvAttachRegion (HandlerObj, ObjDesc, FALSE);
+    return (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvInstallSpaceHandler
+ *
+ * PARAMETERS:  Node            - Namespace node for the device
+ *              SpaceId         - The address space ID
+ *              Handler         - Address of the handler
+ *              Setup           - Address of the setup function
+ *              Context         - Value passed to the handler on each access
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
+ *              Assumes namespace is locked
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvInstallSpaceHandler (
+    ACPI_NAMESPACE_NODE     *Node,
+    ACPI_ADR_SPACE_TYPE     SpaceId,
+    ACPI_ADR_SPACE_HANDLER  Handler,
+    ACPI_ADR_SPACE_SETUP    Setup,
+    void                    *Context)
+{
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_OPERAND_OBJECT     *HandlerObj;
+    ACPI_STATUS             Status;
+    ACPI_OBJECT_TYPE        Type;
+    UINT8                  Flags = 0;
+
+
+    ACPI_FUNCTION_TRACE (EvInstallSpaceHandler);
+
+
+    /*
+     * This registration is valid for only the types below and the root. This
+     * is where the default handlers get placed.
+     */
+    if ((Node->Type != ACPI_TYPE_DEVICE)     &&
+        (Node->Type != ACPI_TYPE_PROCESSOR)  &&
+        (Node->Type != ACPI_TYPE_THERMAL)    &&
+        (Node != AcpiGbl_RootNode))
+    {
+        Status = AE_BAD_PARAMETER;
+        goto UnlockAndExit;
+    }
+
+    if (Handler == ACPI_DEFAULT_HANDLER)
+    {
+        Flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
+
+        switch (SpaceId)
+        {
+        case ACPI_ADR_SPACE_SYSTEM_MEMORY:
+            Handler = AcpiExSystemMemorySpaceHandler;
+            Setup   = AcpiEvSystemMemoryRegionSetup;
+            break;
+
+        case ACPI_ADR_SPACE_SYSTEM_IO:
+            Handler = AcpiExSystemIoSpaceHandler;
+            Setup   = AcpiEvIoSpaceRegionSetup;
+            break;
+
+        case ACPI_ADR_SPACE_PCI_CONFIG:
+            Handler = AcpiExPciConfigSpaceHandler;
+            Setup   = AcpiEvPciConfigRegionSetup;
+            break;
+
+        case ACPI_ADR_SPACE_CMOS:
+            Handler = AcpiExCmosSpaceHandler;
+            Setup   = AcpiEvCmosRegionSetup;
+            break;
+
+        case ACPI_ADR_SPACE_PCI_BAR_TARGET:
+            Handler = AcpiExPciBarSpaceHandler;
+            Setup   = AcpiEvPciBarRegionSetup;
+            break;
+
+        case ACPI_ADR_SPACE_DATA_TABLE:
+            Handler = AcpiExDataTableSpaceHandler;
+            Setup   = NULL;
+            break;
+
+        default:
+            Status = AE_BAD_PARAMETER;
+            goto UnlockAndExit;
+        }
+    }
+
+    /* If the caller hasn't specified a setup routine, use the default */
+
+    if (!Setup)
+    {
+        Setup = AcpiEvDefaultRegionSetup;
+    }
+
+    /* Check for an existing internal object */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (ObjDesc)
+    {
+        /*
+         * The attached device object already exists. Make sure the handler
+         * is not already installed.
+         */
+        HandlerObj = ObjDesc->Device.Handler;
+
+        /* Walk the handler list for this device */
+
+        while (HandlerObj)
+        {
+            /* Same SpaceId indicates a handler already installed */
+
+            if (HandlerObj->AddressSpace.SpaceId == SpaceId)
+            {
+                if (HandlerObj->AddressSpace.Handler == Handler)
+                {
+                    /*
+                     * It is (relatively) OK to attempt to install the SAME
+                     * handler twice. This can easily happen with the
+                     * PCI_Config space.
+                     */
+                    Status = AE_SAME_HANDLER;
+                    goto UnlockAndExit;
+                }
+                else
+                {
+                    /* A handler is already installed */
+
+                    Status = AE_ALREADY_EXISTS;
+                }
+                goto UnlockAndExit;
+            }
+
+            /* Walk the linked list of handlers */
+
+            HandlerObj = HandlerObj->AddressSpace.Next;
+        }
+    }
+    else
+    {
+        ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+            "Creating object on Device %p while installing handler\n", Node));
+
+        /* ObjDesc does not exist, create one */
+
+        if (Node->Type == ACPI_TYPE_ANY)
+        {
+            Type = ACPI_TYPE_DEVICE;
+        }
+        else
+        {
+            Type = Node->Type;
+        }
+
+        ObjDesc = AcpiUtCreateInternalObject (Type);
+        if (!ObjDesc)
+        {
+            Status = AE_NO_MEMORY;
+            goto UnlockAndExit;
+        }
+
+        /* Init new descriptor */
+
+        ObjDesc->Common.Type = (UINT8) Type;
+
+        /* Attach the new object to the Node */
+
+        Status = AcpiNsAttachObject (Node, ObjDesc, Type);
+
+        /* Remove local reference to the object */
+
+        AcpiUtRemoveReference (ObjDesc);
+
+        if (ACPI_FAILURE (Status))
+        {
+            goto UnlockAndExit;
+        }
+    }
+
+    ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
+        "Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
+        AcpiUtGetRegionName (SpaceId), SpaceId,
+        AcpiUtGetNodeName (Node), Node, ObjDesc));
+
+    /*
+     * Install the handler
+     *
+     * At this point there is no existing handler. Just allocate the object
+     * for the handler and link it into the list.
+     */
+    HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
+    if (!HandlerObj)
+    {
+        Status = AE_NO_MEMORY;
+        goto UnlockAndExit;
+    }
+
+    /* Init handler obj */
+
+    HandlerObj->AddressSpace.SpaceId = (UINT8) SpaceId;
+    HandlerObj->AddressSpace.HandlerFlags = Flags;
+    HandlerObj->AddressSpace.RegionList = NULL;
+    HandlerObj->AddressSpace.Node = Node;
+    HandlerObj->AddressSpace.Handler = Handler;
+    HandlerObj->AddressSpace.Context = Context;
+    HandlerObj->AddressSpace.Setup  = Setup;
+
+    /* Install at head of Device.AddressSpace list */
+
+    HandlerObj->AddressSpace.Next = ObjDesc->Device.Handler;
+
+    /*
+     * The Device object is the first reference on the HandlerObj.
+     * Each region that uses the handler adds a reference.
+     */
+    ObjDesc->Device.Handler = HandlerObj;
+
+    /*
+     * Walk the namespace finding all of the regions this
+     * handler will manage.
+     *
+     * Start at the device and search the branch toward
+     * the leaf nodes until either the leaf is encountered or
+     * a device is detected that has an address handler of the
+     * same type.
+     *
+     * In either case, back up and search down the remainder
+     * of the branch
+     */
+    Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
+                ACPI_NS_WALK_UNLOCK, AcpiEvInstallHandler, NULL,
+                HandlerObj, NULL);
+
+UnlockAndExit:
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvExecuteRegMethods
+ *
+ * PARAMETERS:  Node            - Namespace node for the device
+ *              SpaceId         - The address space ID
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Run all _REG methods for the input Space ID;
+ *              Note: assumes namespace is locked, or system init time.
+ *
+ ******************************************************************************/
+
+ACPI_STATUS
+AcpiEvExecuteRegMethods (
+    ACPI_NAMESPACE_NODE     *Node,
+    ACPI_ADR_SPACE_TYPE     SpaceId)
+{
+    ACPI_STATUS             Status;
+
+
+    ACPI_FUNCTION_TRACE (EvExecuteRegMethods);
+
+
+    /*
+     * Run all _REG methods for all Operation Regions for this space ID. This
+     * is a separate walk in order to handle any interdependencies between
+     * regions and _REG methods. (i.e. handlers must be installed for all
+     * regions of this Space ID before we can run any _REG methods)
+     */
+    Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
+                ACPI_NS_WALK_UNLOCK, AcpiEvRegRun, NULL,
+                &SpaceId, NULL);
+
+    /* Special case for EC: handle "orphan" _REG methods with no region */
+
+    if (SpaceId == ACPI_ADR_SPACE_EC)
+    {
+        AcpiEvOrphanEcRegMethod ();
+    }
+
+    return_ACPI_STATUS (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvRegRun
+ *
+ * PARAMETERS:  WalkNamespace callback
+ *
+ * DESCRIPTION: Run _REG method for region objects of the requested spaceID
+ *
+ ******************************************************************************/
+
+static ACPI_STATUS
+AcpiEvRegRun (
+    ACPI_HANDLE             ObjHandle,
+    UINT32                  Level,
+    void                    *Context,
+    void                    **ReturnValue)
+{
+    ACPI_OPERAND_OBJECT     *ObjDesc;
+    ACPI_NAMESPACE_NODE     *Node;
+    ACPI_ADR_SPACE_TYPE     SpaceId;
+    ACPI_STATUS             Status;
+
+
+    SpaceId = *ACPI_CAST_PTR (ACPI_ADR_SPACE_TYPE, Context);
+
+    /* Convert and validate the device handle */
+
+    Node = AcpiNsValidateHandle (ObjHandle);
+    if (!Node)
+    {
+        return (AE_BAD_PARAMETER);
+    }
+
+    /*
+     * We only care about regions.and objects that are allowed to have address
+     * space handlers
+     */
+    if ((Node->Type != ACPI_TYPE_REGION) &&
+        (Node != AcpiGbl_RootNode))
+    {
+        return (AE_OK);
+    }
+
+    /* Check for an existing internal object */
+
+    ObjDesc = AcpiNsGetAttachedObject (Node);
+    if (!ObjDesc)
+    {
+        /* No object, just exit */
+
+        return (AE_OK);
+    }
+
+    /* Object is a Region */
+
+    if (ObjDesc->Region.SpaceId != SpaceId)
+    {
+        /* This region is for a different address space, just ignore it */
+
+        return (AE_OK);
+    }
+
+    Status = AcpiEvExecuteRegMethod (ObjDesc, ACPI_REG_CONNECT);
+    return (Status);
+}
+
+
+/*******************************************************************************
+ *
+ * FUNCTION:    AcpiEvOrphanEcRegMethod
+ *
+ * PARAMETERS:  None
+ *
+ * RETURN:      None
+ *
+ * DESCRIPTION: Execute an "orphan" _REG method that appears under the EC
+ *              device. This is a _REG method that has no corresponding region
+ *              within the EC device scope. The orphan _REG method appears to
+ *              have been enabled by the description of the ECDT in the ACPI
+ *              specification: "The availability of the region space can be
+ *              detected by providing a _REG method object underneath the
+ *              Embedded Controller device."
+ *
+ *              To quickly access the EC device, we use the EC_ID that appears
+ *              within the ECDT. Otherwise, we would need to perform a time-
+ *              consuming namespace walk, executing _HID methods to find the
+ *              EC device.
+ *
+ ******************************************************************************/
+
+static void
+AcpiEvOrphanEcRegMethod (
+    void)
+{
+    ACPI_TABLE_ECDT         *Table;
+    ACPI_STATUS             Status;
+    ACPI_OBJECT_LIST        Args;
+    ACPI_OBJECT             Objects[2];
+    ACPI_NAMESPACE_NODE     *EcDeviceNode;
+    ACPI_NAMESPACE_NODE     *RegMethod;
+    ACPI_NAMESPACE_NODE     *NextNode;
+
+
+    ACPI_FUNCTION_TRACE (EvOrphanEcRegMethod);
+
+
+    /* Get the ECDT (if present in system) */
+
+    Status = AcpiGetTable (ACPI_SIG_ECDT, 0,
+        ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Table));
+    if (ACPI_FAILURE (Status))
+    {
+        return_VOID;
+    }
+
+    /* We need a valid EC_ID string */
+
+    if (!(*Table->Id))
+    {
+        return_VOID;
+    }
+
+    /* Namespace is currently locked, must release */
+
+    (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+
+    /* Get a handle to the EC device referenced in the ECDT */
+
+    Status = AcpiGetHandle (NULL,
+        ACPI_CAST_PTR (char, Table->Id),
+        ACPI_CAST_PTR (ACPI_HANDLE, &EcDeviceNode));
+    if (ACPI_FAILURE (Status))
+    {
+        goto Exit;
+    }
+
+    /* Get a handle to a _REG method immediately under the EC device */
+
+    Status = AcpiGetHandle (EcDeviceNode,
+        METHOD_NAME__REG, ACPI_CAST_PTR (ACPI_HANDLE, &RegMethod));
+    if (ACPI_FAILURE (Status))
+    {
+        goto Exit;
+    }
+
+    /*
+     * Execute the _REG method only if there is no Operation Region in
+     * this scope with the Embedded Controller space ID. Otherwise, it
+     * will already have been executed. Note, this allows for Regions
+     * with other space IDs to be present; but the code below will then
+     * execute the _REG method with the EC space ID argument.
+     */
+    NextNode = AcpiNsGetNextNode (EcDeviceNode, NULL);
+    while (NextNode)
+    {
+        if ((NextNode->Type == ACPI_TYPE_REGION) &&
+            (NextNode->Object) &&
+            (NextNode->Object->Region.SpaceId == ACPI_ADR_SPACE_EC))
+        {
+            goto Exit; /* Do not execute _REG */
+        }
+        NextNode = AcpiNsGetNextNode (EcDeviceNode, NextNode);
+    }
+
+    /* Evaluate the _REG(EC,Connect) method */
+
+    Args.Count = 2;
+    Args.Pointer = Objects;
+    Objects[0].Type = ACPI_TYPE_INTEGER;
+    Objects[0].Integer.Value = ACPI_ADR_SPACE_EC;
+    Objects[1].Type = ACPI_TYPE_INTEGER;
+    Objects[1].Integer.Value = ACPI_REG_CONNECT;
+
+    Status = AcpiEvaluateObject (RegMethod, NULL, &Args, NULL);
+
+Exit:
+    /* We ignore all errors from above, don't care */
+
+    Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
+    return_VOID;
+}