/******************************************************************************
*
* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
* Address Spaces.
*
*****************************************************************************/
/******************************************************************************
*
* 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 __EVXFREGN_C__
#include "acpi.h"
#include "accommon.h"
#include "acnamesp.h"
#include "acevents.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evxfregn")
/*******************************************************************************
*
* FUNCTION: AcpiInstallAddressSpaceHandler
*
* PARAMETERS: Device - Handle 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.
*
* NOTE: This function should only be called after AcpiEnableSubsystem has
* been called. This is because any _REG methods associated with the Space ID
* are executed here, and these methods can only be safely executed after
* the default handlers have been installed and the hardware has been
* initialized (via AcpiEnableSubsystem.)
*
******************************************************************************/
ACPI_STATUS
AcpiInstallAddressSpaceHandler (
ACPI_HANDLE Device,
ACPI_ADR_SPACE_TYPE SpaceId,
ACPI_ADR_SPACE_HANDLER Handler,
ACPI_ADR_SPACE_SETUP Setup,
void *Context)
{
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler);
/* Parameter validation */
if (!Device)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Convert and validate the device handle */
Node = AcpiNsValidateHandle (Device);
if (!Node)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Install the handler for all Regions for this Space ID */
Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
/*
* For the default SpaceIDs, (the IDs for which there are default region handlers
* installed) Only execute the _REG methods if the global initialization _REG
* methods have already been run (via AcpiInitializeObjects). In other words,
* we will defer the execution of the _REG methods for these SpaceIDs until
* execution of AcpiInitializeObjects. This is done because we need the handlers
* for the default spaces (mem/io/pci/table) to be installed before we can run
* any control methods (or _REG methods). There is known BIOS code that depends
* on this.
*
* For all other SpaceIDs, we can safely execute the _REG methods immediately.
* This means that for IDs like EmbeddedController, this function should be called
* only after AcpiEnableSubsystem has been called.
*/
switch (SpaceId)
{
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
case ACPI_ADR_SPACE_SYSTEM_IO:
case ACPI_ADR_SPACE_PCI_CONFIG:
case ACPI_ADR_SPACE_DATA_TABLE:
if (!AcpiGbl_RegMethodsExecuted)
{
/* We will defer execution of the _REG methods for this space */
goto UnlockAndExit;
}
break;
default:
break;
}
/* Run all _REG methods for this address space */
Status = AcpiEvExecuteRegMethods (Node, SpaceId);
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler)
/*******************************************************************************
*
* FUNCTION: AcpiRemoveAddressSpaceHandler
*
* PARAMETERS: Device - Handle for the device
* SpaceId - The address space ID
* Handler - Address of the handler
*
* RETURN: Status
*
* DESCRIPTION: Remove a previously installed handler.
*
******************************************************************************/
ACPI_STATUS
AcpiRemoveAddressSpaceHandler (
ACPI_HANDLE Device,
ACPI_ADR_SPACE_TYPE SpaceId,
ACPI_ADR_SPACE_HANDLER Handler)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_OPERAND_OBJECT *RegionObj;
ACPI_OPERAND_OBJECT **LastObjPtr;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler);
/* Parameter validation */
if (!Device)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Convert and validate the device handle */
Node = AcpiNsValidateHandle (Device);
if (!Node ||
((Node->Type != ACPI_TYPE_DEVICE) &&
(Node->Type != ACPI_TYPE_PROCESSOR) &&
(Node->Type != ACPI_TYPE_THERMAL) &&
(Node != AcpiGbl_RootNode)))
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Make sure the internal object exists */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
Status = AE_NOT_EXIST;
goto UnlockAndExit;
}
/* Find the address handler the user requested */
HandlerObj = ObjDesc->Device.Handler;
LastObjPtr = &ObjDesc->Device.Handler;
while (HandlerObj)
{
/* We have a handler, see if user requested this one */
if (HandlerObj->AddressSpace.SpaceId == SpaceId)
{
/* Handler must be the same as the installed handler */
if (HandlerObj->AddressSpace.Handler != Handler)
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
/* Matched SpaceId, first dereference this in the Regions */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Removing address handler %p(%p) for region %s "
"on Device %p(%p)\n",
HandlerObj, Handler, AcpiUtGetRegionName (SpaceId),
Node, ObjDesc));
RegionObj = HandlerObj->AddressSpace.RegionList;
/* Walk the handler's region list */
while (RegionObj)
{
/*
* First disassociate the handler from the region.
*
* NOTE: this doesn't mean that the region goes away
* The region is just inaccessible as indicated to
* the _REG method
*/
AcpiEvDetachRegion (RegionObj, TRUE);
/*
* Walk the list: Just grab the head because the
* DetachRegion removed the previous head.
*/
RegionObj = HandlerObj->AddressSpace.RegionList;
}
/* Remove this Handler object from the list */
*LastObjPtr = HandlerObj->AddressSpace.Next;
/* Now we can delete the handler object */
AcpiUtRemoveReference (HandlerObj);
goto UnlockAndExit;
}
/* Walk the linked list of handlers */
LastObjPtr = &HandlerObj->AddressSpace.Next;
HandlerObj = HandlerObj->AddressSpace.Next;
}
/* The handler does not exist */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc));
Status = AE_NOT_EXIST;
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler)