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diff --git a/sys/contrib/dev/acpica/components/events/evregion.c b/sys/contrib/dev/acpica/components/events/evregion.c
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+/******************************************************************************
+ *
+ * Module Name: evregion - Operation Region support
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2013, 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")
+
+
+extern UINT8 AcpiGbl_DefaultAddressSpaces[];
+
+/* Local prototypes */
+
+static void
+AcpiEvOrphanEcRegMethod (
+ ACPI_NAMESPACE_NODE *EcDeviceNode);
+
+static ACPI_STATUS
+AcpiEvRegRun (
+ ACPI_HANDLE ObjHandle,
+ UINT32 Level,
+ void *Context,
+ void **ReturnValue);
+
+
+/*******************************************************************************
+ *
+ * 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: 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: 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->RelativePathname = 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: 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 (Node);
+ }
+
+ 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: EcDeviceNode - Namespace node for an EC device
+ *
+ * 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 EcDeviceNode used
+ * during EC handler installation. Otherwise, we would need to
+ * perform a time consuming namespace walk, executing _HID
+ * methods to find the EC device.
+ *
+ * MUTEX: Assumes the namespace is locked
+ *
+ ******************************************************************************/
+
+static void
+AcpiEvOrphanEcRegMethod (
+ ACPI_NAMESPACE_NODE *EcDeviceNode)
+{
+ ACPI_HANDLE RegMethod;
+ ACPI_NAMESPACE_NODE *NextNode;
+ ACPI_STATUS Status;
+ ACPI_OBJECT_LIST Args;
+ ACPI_OBJECT Objects[2];
+
+
+ ACPI_FUNCTION_TRACE (EvOrphanEcRegMethod);
+
+
+ if (!EcDeviceNode)
+ {
+ return_VOID;
+ }
+
+ /* Namespace is currently locked, must release */
+
+ (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
+
+ /* Get a handle to a _REG method immediately under the EC device */
+
+ Status = AcpiGetHandle (EcDeviceNode, METHOD_NAME__REG, &RegMethod);
+ if (ACPI_FAILURE (Status))
+ {
+ goto Exit; /* There is no _REG method present */
+ }
+
+ /*
+ * 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 EmbeddedControl SpaceID 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 the _REG */
+ }
+
+ NextNode = AcpiNsGetNextNode (EcDeviceNode, NextNode);
+ }
+
+ /* Evaluate the _REG(EmbeddedControl,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;
+}
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