386 lines
14 KiB
C
386 lines
14 KiB
C
/******************************************************************************
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*
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* Module Name: evxfregn - External Interfaces, ACPI Operation Regions and
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* Address Spaces.
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification with rights to further distribute source must include
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* the above Copyright Notice, the above License, this list of Conditions,
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* and the following Disclaimer and Export Compliance provision. In addition,
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* Licensee must cause all Covered Code to which Licensee contributes to
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* contain a file documenting the changes Licensee made to create that Covered
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* Code and the date of any change. Licensee must include in that file the
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* documentation of any changes made by any predecessor Licensee. Licensee
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* must include a prominent statement that the modification is derived,
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* directly or indirectly, from Original Intel Code.
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*
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* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
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* Code or modification without rights to further distribute source must
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* include the following Disclaimer and Export Compliance provision in the
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* documentation and/or other materials provided with distribution. In
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* addition, Licensee may not authorize further sublicense of source of any
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* portion of the Covered Code, and must include terms to the effect that the
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* license from Licensee to its licensee is limited to the intellectual
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* property embodied in the software Licensee provides to its licensee, and
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* not to intellectual property embodied in modifications its licensee may
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* make.
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*
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* 3.3. Redistribution of Executable. Redistribution in executable form of any
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* substantial portion of the Covered Code or modification must reproduce the
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* above Copyright Notice, and the following Disclaimer and Export Compliance
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* provision in the documentation and/or other materials provided with the
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* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
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* Intel shall be used in advertising or otherwise to promote the sale, use or
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* other dealings in products derived from or relating to the Covered Code
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
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* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
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* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
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* any other agency or department of the United States Government. In the
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* event Licensee exports any such software from the United States or
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* re-exports any such software from a foreign destination, Licensee shall
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* ensure that the distribution and export/re-export of the software is in
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* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
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* software, or service, directly or indirectly, to any country for which the
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* United States government or any agency thereof requires an export license,
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* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __EVXFREGN_C__
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#include "acpi.h"
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxfregn")
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallAddressSpaceHandler
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*
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* PARAMETERS: Device - Handle for the device
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* SpaceId - The address space ID
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* Handler - Address of the handler
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* Setup - Address of the setup function
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* Context - Value passed to the handler on each access
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
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*
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* NOTE: This function should only be called after AcpiEnableSubsystem has
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* been called. This is because any _REG methods associated with the Space ID
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* are executed here, and these methods can only be safely executed after
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* the default handlers have been installed and the hardware has been
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* initialized (via AcpiEnableSubsystem.)
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallAddressSpaceHandler (
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ACPI_HANDLE Device,
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_ADR_SPACE_HANDLER Handler,
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ACPI_ADR_SPACE_SETUP Setup,
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void *Context)
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{
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiInstallAddressSpaceHandler);
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/* Parameter validation */
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if (!Device)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Convert and validate the device handle */
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Node = AcpiNsValidateHandle (Device);
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if (!Node)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Install the handler for all Regions for this Space ID */
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Status = AcpiEvInstallSpaceHandler (Node, SpaceId, Handler, Setup, Context);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* For the default SpaceIDs, (the IDs for which there are default region handlers
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* installed) Only execute the _REG methods if the global initialization _REG
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* methods have already been run (via AcpiInitializeObjects). In other words,
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* we will defer the execution of the _REG methods for these SpaceIDs until
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* execution of AcpiInitializeObjects. This is done because we need the handlers
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* for the default spaces (mem/io/pci/table) to be installed before we can run
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* any control methods (or _REG methods). There is known BIOS code that depends
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* on this.
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*
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* For all other SpaceIDs, we can safely execute the _REG methods immediately.
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* This means that for IDs like EmbeddedController, this function should be called
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* only after AcpiEnableSubsystem has been called.
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*/
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switch (SpaceId)
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{
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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case ACPI_ADR_SPACE_SYSTEM_IO:
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case ACPI_ADR_SPACE_PCI_CONFIG:
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case ACPI_ADR_SPACE_DATA_TABLE:
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if (!AcpiGbl_RegMethodsExecuted)
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{
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/* We will defer execution of the _REG methods for this space */
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goto UnlockAndExit;
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}
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break;
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default:
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break;
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}
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/* Run all _REG methods for this address space */
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Status = AcpiEvExecuteRegMethods (Node, SpaceId);
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiInstallAddressSpaceHandler)
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/*******************************************************************************
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*
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* FUNCTION: AcpiRemoveAddressSpaceHandler
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*
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* PARAMETERS: Device - Handle for the device
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* SpaceId - The address space ID
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a previously installed handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiRemoveAddressSpaceHandler (
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ACPI_HANDLE Device,
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ACPI_ADR_SPACE_TYPE SpaceId,
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ACPI_ADR_SPACE_HANDLER Handler)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *HandlerObj;
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ACPI_OPERAND_OBJECT *RegionObj;
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ACPI_OPERAND_OBJECT **LastObjPtr;
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ACPI_NAMESPACE_NODE *Node;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiRemoveAddressSpaceHandler);
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/* Parameter validation */
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if (!Device)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Convert and validate the device handle */
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Node = AcpiNsValidateHandle (Device);
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if (!Node ||
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((Node->Type != ACPI_TYPE_DEVICE) &&
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(Node->Type != ACPI_TYPE_PROCESSOR) &&
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(Node->Type != ACPI_TYPE_THERMAL) &&
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(Node != AcpiGbl_RootNode)))
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Make sure the internal object exists */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (!ObjDesc)
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{
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Status = AE_NOT_EXIST;
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goto UnlockAndExit;
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}
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/* Find the address handler the user requested */
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HandlerObj = ObjDesc->Device.Handler;
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LastObjPtr = &ObjDesc->Device.Handler;
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while (HandlerObj)
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{
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/* We have a handler, see if user requested this one */
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if (HandlerObj->AddressSpace.SpaceId == SpaceId)
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{
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/* Handler must be the same as the installed handler */
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if (HandlerObj->AddressSpace.Handler != Handler)
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{
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Status = AE_BAD_PARAMETER;
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goto UnlockAndExit;
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}
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/* Matched SpaceId, first dereference this in the Regions */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Removing address handler %p(%p) for region %s "
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"on Device %p(%p)\n",
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HandlerObj, Handler, AcpiUtGetRegionName (SpaceId),
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Node, ObjDesc));
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RegionObj = HandlerObj->AddressSpace.RegionList;
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/* Walk the handler's region list */
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while (RegionObj)
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{
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/*
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* First disassociate the handler from the region.
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*
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* NOTE: this doesn't mean that the region goes away
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* The region is just inaccessible as indicated to
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* the _REG method
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*/
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AcpiEvDetachRegion (RegionObj, TRUE);
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/*
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* Walk the list: Just grab the head because the
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* DetachRegion removed the previous head.
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*/
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RegionObj = HandlerObj->AddressSpace.RegionList;
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}
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/* Remove this Handler object from the list */
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*LastObjPtr = HandlerObj->AddressSpace.Next;
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/* Now we can delete the handler object */
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AcpiUtRemoveReference (HandlerObj);
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goto UnlockAndExit;
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}
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/* Walk the linked list of handlers */
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LastObjPtr = &HandlerObj->AddressSpace.Next;
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HandlerObj = HandlerObj->AddressSpace.Next;
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}
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/* The handler does not exist */
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Unable to remove address handler %p for %s(%X), DevNode %p, obj %p\n",
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Handler, AcpiUtGetRegionName (SpaceId), SpaceId, Node, ObjDesc));
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Status = AE_NOT_EXIST;
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UnlockAndExit:
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(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiRemoveAddressSpaceHandler)
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