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Operation region access dispatch

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date	99.06.03.15.57.00;	author rmoore1;	state Exp;
This commit is contained in:
aystarik 2005-06-29 16:39:27 +00:00
parent b2054503be
commit 10b80b150d
1 changed files with 79 additions and 779 deletions
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source/components/events/evregion.c
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@ -1,7 +1,6 @@
/******************************************************************************
*
* Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch
* $Revision: 1.139 $
*
* Module Name: evregion - ACPI Operation Region handler dispatch
*
*****************************************************************************/
@ -9,813 +8,114 @@
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2003, Intel Corp.
* All rights reserved.
* Some or all of this work - Copyright (c) 1999, Intel Corp. All rights
* reserved.
*
* 2. License
*
* 2.1. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") a 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; and
*
* 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 Licensee a non-exclusive and non-transferable patent
* license (without 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;
*
* 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
* the above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
* 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.
* 3.1. Redistribution of source code of any substantial portion of the Covered
* Code or modification 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.
* 3.2. Redistribution in binary 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.
*
* 3.3. 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
* 3.3. 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
* 3.4. 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.
* 4.1. 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
* 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.
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* required license or other approval from the U. S. Department of Commerce or
* any other agency or department of the United States Government. In the
* event Licensee exports any such software from the United States or re-
* exports any such software from a foreign destination, Licensee shall ensure
* that the distribution and export/re-export of the software is in compliance
* with all laws, regulations, orders, or other restrictions of the U.S. Export
* Administration Regulations. Licensee agrees that neither it nor any of its
* subsidiaries will export/re-export any technical data, process, software, or
* service, directly or indirectly, to any country for which the United States
* government or any agency thereof requires an export license, other
* governmental approval, or letter of assurance, without first obtaining such
* license, approval or letter.
*
*****************************************************************************/
#include <acpi.h>
#include <events.h>
#define __EVREGION_C__
#include "acpi.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evregion")
#define _THIS_MODULE "evregion.c"
#define _COMPONENT EVENT_HANDLING
/*******************************************************************************
/**************************************************************************
*
* FUNCTION: AcpiEvInitAddressSpaces
* FUNCTION: EvOpRegionDispatch
*
* PARAMETERS:
* PARAMETERS:
*
* RETURN: Status
* RETURN: None.
*
* DESCRIPTION: Installs the core subsystem address space handlers.
* DESCRIPTION: Dispatch an operation region access to a previously
* installed handler.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitAddressSpaces (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE ("EvInitAddressSpaces");
/*
* All address spaces (PCI Config, EC, SMBus) are scope dependent
* and registration must occur for a specific device. In the case
* 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)
*/
Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
ACPI_ADR_SPACE_SYSTEM_MEMORY,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if ((ACPI_FAILURE (Status)) &&
(Status != AE_ALREADY_EXISTS))
{
return_ACPI_STATUS (Status);
}
Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
ACPI_ADR_SPACE_SYSTEM_IO,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if ((ACPI_FAILURE (Status)) &&
(Status != AE_ALREADY_EXISTS))
{
return_ACPI_STATUS (Status);
}
Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if ((ACPI_FAILURE (Status)) &&
(Status != AE_ALREADY_EXISTS))
{
return_ACPI_STATUS (Status);
}
Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
ACPI_ADR_SPACE_DATA_TABLE,
ACPI_DEFAULT_HANDLER, NULL, NULL);
if ((ACPI_FAILURE (Status)) &&
(Status != AE_ALREADY_EXISTS))
{
return_ACPI_STATUS (Status);
}
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvExecuteRegMethod
*
* PARAMETERS: RegionObj - Object structure
* Function - On (1) or Off (0)
*
* RETURN: Status
*
* DESCRIPTION: Execute _REG method for a region
*
******************************************************************************/
static ACPI_STATUS
AcpiEvExecuteRegMethod (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function)
{
ACPI_OPERAND_OBJECT *Params[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);
}
/*
* _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
*/
Params[0] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!Params[0])
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Params[1] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
if (!Params[1])
{
Status = AE_NO_MEMORY;
goto Cleanup;
}
/* Set up the parameter objects */
Params[0]->Integer.Value = RegionObj->Region.SpaceId;
Params[1]->Integer.Value = Function;
Params[2] = NULL;
/* Execute the method, no return value */
ACPI_DEBUG_EXEC(AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, RegionObj2->Extra.Method_REG, NULL));
Status = AcpiNsEvaluateByHandle (RegionObj2->Extra.Method_REG, Params, NULL);
AcpiUtRemoveReference (Params[1]);
Cleanup:
AcpiUtRemoveReference (Params[0]);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvAddressSpaceDispatch
*
* PARAMETERS: RegionObj - internal region object
* SpaceId - ID of the address space (0-255)
* Function - Read or Write operation
* Address - Where in the space to read or write
* BitWidth - Field width in bits (8, 16, 32, or 64)
* Value - Pointer to in or out value
*
* RETURN: Status
*
* DESCRIPTION: Dispatch an address space or operation region access to
* a previously installed handler.
*
******************************************************************************/
ACPI_STATUS
AcpiEvAddressSpaceDispatch (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function,
ACPI_PHYSICAL_ADDRESS Address,
UINT32 BitWidth,
void *Value)
{
ACPI_STATUS Status;
ACPI_STATUS Status2;
ACPI_ADR_SPACE_HANDLER Handler;
ACPI_ADR_SPACE_SETUP RegionSetup;
ACPI_OPERAND_OBJECT *HandlerDesc;
ACPI_OPERAND_OBJECT *RegionObj2;
void *RegionContext = NULL;
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.AddressSpace;
if (!HandlerDesc)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "no handler for region(%p) [%s]\n",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* 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_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n",
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 (e.g., _REG method for this region)
*/
AcpiExExitInterpreter ();
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
HandlerDesc->AddressSpace.Context, &RegionContext);
/* Re-enter the interpreter */
Status2 = AcpiExEnterInterpreter ();
if (ACPI_FAILURE (Status2))
{
return_ACPI_STATUS (Status2);
}
/* Check for failure of the Region Setup */
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n",
AcpiFormatException (Status),
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_MEM_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.AddressSpace->AddressSpace, Handler,
ACPI_HIDWORD (Address), ACPI_LODWORD (Address),
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
if (!(HandlerDesc->AddressSpace.Flags & 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, Address, BitWidth, Value,
HandlerDesc->AddressSpace.Context,
RegionObj2->Extra.RegionContext);
if (ACPI_FAILURE (Status))
{
ACPI_REPORT_ERROR (("Handler for [%s] returned %s\n",
AcpiUtGetRegionName (RegionObj->Region.SpaceId),
AcpiFormatException (Status)));
}
if (!(HandlerDesc->AddressSpace.Flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
{
/*
* We just returned from a non-default handler, we must re-enter the
* interpreter
*/
Status2 = AcpiExEnterInterpreter ();
if (ACPI_FAILURE (Status2))
{
return_ACPI_STATUS (Status2);
}
}
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)
EvOpRegionDispatch (UINT32 Region)
{
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.AddressSpace;
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, 0);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region _REG, [%s]\n",
AcpiFormatException (Status),
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
}
if (AcpiNsIsLocked)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_VOID;
}
}
/* Call the setup handler with the deactivate notification */
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_DEBUG_PRINT ((ACPI_DB_ERROR, "%s from region init, [%s]\n",
AcpiFormatException (Status),
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 better be the region's handler
*/
RegionObj->Region.AddressSpace = 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_STATUS Status;
ACPI_STATUS Status2;
ACPI_FUNCTION_TRACE ("EvAttachRegion");
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Adding Region %p to address handler %p [%s]\n",
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.AddressSpace)
{
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
RegionObj->Region.AddressSpace = HandlerObj;
AcpiUtAddReference (HandlerObj);
/*
* Tell all users that this region is usable by running the _REG
* method
*/
if (AcpiNsIsLocked)
{
Status2 = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status2))
{
return_ACPI_STATUS (Status2);
}
}
Status = AcpiEvExecuteRegMethod (RegionObj, 1);
if (AcpiNsIsLocked)
{
Status2 = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status2))
{
return_ACPI_STATUS (Status2);
}
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallHandler
*
* PARAMETERS: Handle - Node to be dumped
* Level - Nesting level of the handle
* Context - Passed into AcpiNsWalkNamespace
*
* 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.
*
******************************************************************************/
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 = AcpiNsMapHandleToNode (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 (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_DEVICE)
{
/* Check if this Device already has a handler for this address space */
NextHandlerObj = ObjDesc->Device.AddressSpace;
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);
}