830 lines
27 KiB
C
830 lines
27 KiB
C
/******************************************************************************
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*
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* Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch
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* $Revision: 137 $
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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 - 2003, 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 __EVREGION_C__
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#include "acpi.h"
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#include "acevents.h"
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#include "acnamesp.h"
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#include "acinterp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evregion")
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInitAddressSpaces
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*
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* PARAMETERS:
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*
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* RETURN: Status
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*
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* DESCRIPTION: Installs the core subsystem address space handlers.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitAddressSpaces (
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void)
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{
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("EvInitAddressSpaces");
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/*
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* All address spaces (PCI Config, EC, SMBus) are scope dependent
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* and registration must occur for a specific device. In the case
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* system memory and IO address spaces there is currently no device
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* associated with the address space. For these we use the root.
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* We install the default PCI config space handler at the root so
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* that this space is immediately available even though the we have
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* not enumerated all the PCI Root Buses yet. This is to conform
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* to the ACPI specification which states that the PCI config
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* space must be always available -- even though we are nowhere
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* near ready to find the PCI root buses at this point.
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*
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* NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
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* has already been installed (via AcpiInstallAddressSpaceHandler)
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*/
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Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
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ACPI_ADR_SPACE_SYSTEM_MEMORY,
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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if ((ACPI_FAILURE (Status)) &&
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(Status != AE_ALREADY_EXISTS))
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
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ACPI_ADR_SPACE_SYSTEM_IO,
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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if ((ACPI_FAILURE (Status)) &&
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(Status != AE_ALREADY_EXISTS))
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
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ACPI_ADR_SPACE_PCI_CONFIG,
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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if ((ACPI_FAILURE (Status)) &&
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(Status != AE_ALREADY_EXISTS))
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiInstallAddressSpaceHandler ((ACPI_HANDLE) AcpiGbl_RootNode,
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ACPI_ADR_SPACE_DATA_TABLE,
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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if ((ACPI_FAILURE (Status)) &&
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(Status != AE_ALREADY_EXISTS))
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{
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return_ACPI_STATUS (Status);
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}
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return_ACPI_STATUS (AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvExecuteRegMethod
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*
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* PARAMETERS: RegionObj - Object structure
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* Function - On (1) or Off (0)
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute _REG method for a region
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*
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******************************************************************************/
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static ACPI_STATUS
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AcpiEvExecuteRegMethod (
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ACPI_OPERAND_OBJECT *RegionObj,
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UINT32 Function)
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{
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ACPI_OPERAND_OBJECT *Params[3];
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("EvExecuteRegMethod");
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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if (RegionObj2->Extra.Method_REG == NULL)
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{
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return_ACPI_STATUS (AE_OK);
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}
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/*
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* _REG method has two arguments
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* Arg0: Integer: Operation region space ID
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* Same value as RegionObj->Region.SpaceId
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* Arg1: Integer: connection status
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* 1 for connecting the handler,
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* 0 for disconnecting the handler
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* Passed as a parameter
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*/
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Params[0] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
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if (!Params[0])
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
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Params[1] = AcpiUtCreateInternalObject (ACPI_TYPE_INTEGER);
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if (!Params[1])
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{
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Status = AE_NO_MEMORY;
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goto Cleanup;
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}
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/*
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* Set up the parameter objects
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*/
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Params[0]->Integer.Value = RegionObj->Region.SpaceId;
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Params[1]->Integer.Value = Function;
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Params[2] = NULL;
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/*
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* Execute the method, no return value
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*/
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ACPI_DEBUG_EXEC(AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, RegionObj2->Extra.Method_REG, NULL));
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Status = AcpiNsEvaluateByHandle (RegionObj2->Extra.Method_REG, Params, NULL);
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AcpiUtRemoveReference (Params[1]);
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Cleanup:
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AcpiUtRemoveReference (Params[0]);
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvAddressSpaceDispatch
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*
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* PARAMETERS: RegionObj - internal region object
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* SpaceId - ID of the address space (0-255)
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* Function - Read or Write operation
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* Address - Where in the space to read or write
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* BitWidth - Field width in bits (8, 16, 32, or 64)
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* Value - Pointer to in or out value
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dispatch an address space or operation region access to
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* a previously installed handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvAddressSpaceDispatch (
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ACPI_OPERAND_OBJECT *RegionObj,
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UINT32 Function,
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ACPI_PHYSICAL_ADDRESS Address,
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UINT32 BitWidth,
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void *Value)
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{
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ACPI_STATUS Status;
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ACPI_STATUS Status2;
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ACPI_ADR_SPACE_HANDLER Handler;
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ACPI_ADR_SPACE_SETUP RegionSetup;
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ACPI_OPERAND_OBJECT *HandlerDesc;
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ACPI_OPERAND_OBJECT *RegionObj2;
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void *RegionContext = NULL;
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ACPI_FUNCTION_TRACE ("EvAddressSpaceDispatch");
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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/*
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* Ensure that there is a handler associated with this region
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*/
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HandlerDesc = RegionObj->Region.AddrHandler;
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if (!HandlerDesc)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "no handler for region(%p) [%s]\n",
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RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (AE_NOT_EXIST);
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}
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/*
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* It may be the case that the region has never been initialized
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* Some types of regions require special init code
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*/
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if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
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{
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/*
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* This region has not been initialized yet, do it
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*/
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RegionSetup = HandlerDesc->AddrHandler.Setup;
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if (!RegionSetup)
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{
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/*
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* Bad news, no init routine and not init'd
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "No init routine for region(%p) [%s]\n",
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RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (AE_UNKNOWN_STATUS);
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}
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/*
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* We must exit the interpreter because the region setup will potentially
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* execute control methods
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*/
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AcpiExExitInterpreter ();
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Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
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HandlerDesc->AddrHandler.Context, &RegionContext);
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/* Re-enter the interpreter */
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Status2 = AcpiExEnterInterpreter ();
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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/*
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* Init routine may fail
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*/
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Region Init: %s [%s]\n",
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AcpiFormatException (Status),
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AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
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return_ACPI_STATUS (Status);
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}
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RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
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/*
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* Save the returned context for use in all accesses to
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* this particular region.
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*/
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RegionObj2->Extra.RegionContext = RegionContext;
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}
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/*
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* We have everything we need, begin the process
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*/
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Handler = HandlerDesc->AddrHandler.Handler;
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Addrhandler %p (%p), Address %8.8X%8.8X\n",
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&RegionObj->Region.AddrHandler->AddrHandler, Handler,
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ACPI_HIDWORD (Address), ACPI_LODWORD (Address)));
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if (!(HandlerDesc->AddrHandler.Flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
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{
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/*
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* For handlers other than the default (supplied) handlers, we must
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* exit the interpreter because the handler *might* block -- we don't
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* know what it will do, so we can't hold the lock on the intepreter.
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*/
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AcpiExExitInterpreter();
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}
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/*
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* Invoke the handler.
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*/
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Status = Handler (Function, Address, BitWidth, Value,
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HandlerDesc->AddrHandler.Context,
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RegionObj2->Extra.RegionContext);
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if (ACPI_FAILURE (Status))
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{
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ACPI_REPORT_ERROR (("Handler for [%s] returned %s\n",
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AcpiUtGetRegionName (RegionObj->Region.SpaceId),
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AcpiFormatException (Status)));
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}
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if (!(HandlerDesc->AddrHandler.Flags & ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
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{
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/*
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* We just returned from a non-default handler, we must re-enter the
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* interpreter
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*/
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Status2 = AcpiExEnterInterpreter ();
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if (ACPI_FAILURE (Status2))
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{
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return_ACPI_STATUS (Status2);
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}
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}
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return_ACPI_STATUS (Status);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvDetachRegion
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*
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* PARAMETERS: RegionObj - Region Object
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* AcpiNsIsLocked - Namespace Region Already Locked?
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*
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* RETURN: None
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*
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* DESCRIPTION: Break the association between the handler and the region
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* this is a two way association.
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*
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******************************************************************************/
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void
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AcpiEvDetachRegion(
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ACPI_OPERAND_OBJECT *RegionObj,
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BOOLEAN AcpiNsIsLocked)
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{
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ACPI_OPERAND_OBJECT *HandlerObj;
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT **LastObjPtr;
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ACPI_ADR_SPACE_SETUP RegionSetup;
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void *RegionContext;
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE ("EvDetachRegion");
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RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
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if (!RegionObj2)
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{
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return_VOID;
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}
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RegionContext = RegionObj2->Extra.RegionContext;
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/*
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* Get the address handler from the region object
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*/
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HandlerObj = RegionObj->Region.AddrHandler;
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if (!HandlerObj)
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{
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/*
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* This region has no handler, all done
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*/
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return_VOID;
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}
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/*
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* Find this region in the handler's list
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*/
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ObjDesc = HandlerObj->AddrHandler.RegionList;
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LastObjPtr = &HandlerObj->AddrHandler.RegionList;
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while (ObjDesc)
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{
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/*
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* See if this is the one
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*/
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if (ObjDesc == RegionObj)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
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"Removing Region %p from address handler %p\n",
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RegionObj, HandlerObj));
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/*
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* This is it, remove it from the handler's list
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*/
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*LastObjPtr = ObjDesc->Region.Next;
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ObjDesc->Region.Next = NULL; /* Must clear field */
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if (AcpiNsIsLocked)
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{
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Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
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if (ACPI_FAILURE (Status))
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{
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return_VOID;
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}
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}
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/*
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* Now stop region accesses by executing the _REG method
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*/
|
|
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->AddrHandler.Setup;
|
|
Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
|
|
HandlerObj->AddrHandler.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.AddrHandler = NULL;
|
|
|
|
return_VOID;
|
|
|
|
} /* found the right handler */
|
|
|
|
/*
|
|
* Move through 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->AddrHandler.RegionList;
|
|
HandlerObj->AddrHandler.RegionList = RegionObj;
|
|
|
|
/*
|
|
* Set the region's handler
|
|
*/
|
|
RegionObj->Region.AddrHandler = 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: AcpiEvAddrHandlerHelper
|
|
*
|
|
* 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.
|
|
*
|
|
* 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
|
|
AcpiEvAddrHandlerHelper (
|
|
ACPI_HANDLE ObjHandle,
|
|
UINT32 Level,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_OPERAND_OBJECT *HandlerObj;
|
|
ACPI_OPERAND_OBJECT *TmpObj;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_NAME ("EvAddrHandlerHelper");
|
|
|
|
|
|
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 can have address 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)
|
|
{
|
|
/*
|
|
* The object DNE, we don't care about it
|
|
*/
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Devices are handled different than regions
|
|
*/
|
|
if (ACPI_GET_OBJECT_TYPE (ObjDesc) == ACPI_TYPE_DEVICE)
|
|
{
|
|
/*
|
|
* See if this guy has any handlers
|
|
*/
|
|
TmpObj = ObjDesc->Device.AddrHandler;
|
|
while (TmpObj)
|
|
{
|
|
/*
|
|
* Now let's see if it's for the same address space.
|
|
*/
|
|
if (TmpObj->AddrHandler.SpaceId == HandlerObj->AddrHandler.SpaceId)
|
|
{
|
|
/*
|
|
* It's for the same address space
|
|
*/
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Found handler for region [%s] in device %p(%p) handler %p\n",
|
|
AcpiUtGetRegionName (HandlerObj->AddrHandler.SpaceId),
|
|
ObjDesc, TmpObj, 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);
|
|
}
|
|
|
|
/*
|
|
* Move through the linked list of handlers
|
|
*/
|
|
TmpObj = TmpObj->AddrHandler.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);
|
|
}
|
|
|
|
/*
|
|
* Only here if it was a region
|
|
*/
|
|
if (ObjDesc->Region.SpaceId != HandlerObj->AddrHandler.SpaceId)
|
|
{
|
|
/*
|
|
* This region is for a different address space
|
|
* 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);
|
|
|
|
/*
|
|
* Then connect the region to the new handler
|
|
*/
|
|
Status = AcpiEvAttachRegion (HandlerObj, ObjDesc, FALSE);
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|