1413 lines
42 KiB
C
1413 lines
42 KiB
C
/******************************************************************************
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*
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* Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch
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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 __EVREGION_C__
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#include "acpi.h"
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#include "accommon.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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/* Local prototypes */
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static BOOLEAN
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AcpiEvHasDefaultHandler (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_ADR_SPACE_TYPE SpaceId);
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static void
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AcpiEvOrphanEcRegMethod (
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void);
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static ACPI_STATUS
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AcpiEvRegRun (
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ACPI_HANDLE ObjHandle,
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UINT32 Level,
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void *Context,
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void **ReturnValue);
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static ACPI_STATUS
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AcpiEvInstallHandler (
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ACPI_HANDLE ObjHandle,
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UINT32 Level,
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void *Context,
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void **ReturnValue);
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/* These are the address spaces that will get default handlers */
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#define ACPI_NUM_DEFAULT_SPACES 4
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static UINT8 AcpiGbl_DefaultAddressSpaces[ACPI_NUM_DEFAULT_SPACES] =
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{
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ACPI_ADR_SPACE_SYSTEM_MEMORY,
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ACPI_ADR_SPACE_SYSTEM_IO,
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ACPI_ADR_SPACE_PCI_CONFIG,
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ACPI_ADR_SPACE_DATA_TABLE
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};
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInstallRegionHandlers
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Installs the core subsystem default address space handlers.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInstallRegionHandlers (
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void)
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{
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ACPI_STATUS Status;
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UINT32 i;
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ACPI_FUNCTION_TRACE (EvInstallRegionHandlers);
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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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/*
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* All address spaces (PCI Config, EC, SMBus) are scope dependent and
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* registration must occur for a specific device.
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*
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* In the case of the system memory and IO address spaces there is
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* currently no device associated with the address space. For these we
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* use the root.
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*
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* We install the default PCI config space handler at the root so that
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* this space is immediately available even though the we have not
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* enumerated all the PCI Root Buses yet. This is to conform to the ACPI
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* specification which states that the PCI config space must be always
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* available -- even though we are nowhere near ready to find the PCI root
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* 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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* Similar for AE_SAME_HANDLER.
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*/
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for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
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{
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Status = AcpiEvInstallSpaceHandler (AcpiGbl_RootNode,
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AcpiGbl_DefaultAddressSpaces[i],
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ACPI_DEFAULT_HANDLER, NULL, NULL);
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switch (Status)
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{
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case AE_OK:
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case AE_SAME_HANDLER:
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case AE_ALREADY_EXISTS:
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/* These exceptions are all OK */
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Status = AE_OK;
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break;
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default:
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goto UnlockAndExit;
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}
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}
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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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/*******************************************************************************
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*
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* FUNCTION: AcpiEvHasDefaultHandler
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*
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* PARAMETERS: Node - Namespace node for the device
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* SpaceId - The address space ID
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*
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* RETURN: TRUE if default handler is installed, FALSE otherwise
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*
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* DESCRIPTION: Check if the default handler is installed for the requested
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* space ID.
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*
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******************************************************************************/
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static BOOLEAN
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AcpiEvHasDefaultHandler (
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ACPI_NAMESPACE_NODE *Node,
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ACPI_ADR_SPACE_TYPE SpaceId)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *HandlerObj;
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/* Must have an existing internal object */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (ObjDesc)
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{
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HandlerObj = ObjDesc->Device.Handler;
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/* Walk the linked list of handlers for this object */
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while (HandlerObj)
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{
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if (HandlerObj->AddressSpace.SpaceId == SpaceId)
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{
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if (HandlerObj->AddressSpace.HandlerFlags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
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{
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return (TRUE);
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}
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}
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HandlerObj = HandlerObj->AddressSpace.Next;
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}
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvInitializeOpRegions
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Execute _REG methods for all Operation Regions that have
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* an installed default region handler.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEvInitializeOpRegions (
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void)
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{
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ACPI_STATUS Status;
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UINT32 i;
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ACPI_FUNCTION_TRACE (EvInitializeOpRegions);
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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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/* Run the _REG methods for OpRegions in each default address space */
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for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
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{
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/*
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* Make sure the installed handler is the DEFAULT handler. If not the
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* default, the _REG methods will have already been run (when the
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* handler was installed)
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*/
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if (AcpiEvHasDefaultHandler (AcpiGbl_RootNode,
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AcpiGbl_DefaultAddressSpaces[i]))
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{
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Status = AcpiEvExecuteRegMethods (AcpiGbl_RootNode,
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AcpiGbl_DefaultAddressSpaces[i]);
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}
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}
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AcpiGbl_RegMethodsExecuted = TRUE;
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|
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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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|
|
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvExecuteRegMethod
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*
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* PARAMETERS: RegionObj - Region object
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* Function - Passed to _REG: 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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|
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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_EVALUATE_INFO *Info;
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ACPI_OPERAND_OBJECT *Args[3];
|
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ACPI_OPERAND_OBJECT *RegionObj2;
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ACPI_STATUS Status;
|
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|
|
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ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
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|
|
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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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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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/* Allocate and initialize the evaluation information block */
|
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|
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Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
|
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if (!Info)
|
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{
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return_ACPI_STATUS (AE_NO_MEMORY);
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}
|
|
|
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Info->PrefixNode = RegionObj2->Extra.Method_REG;
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Info->Pathname = NULL;
|
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Info->Parameters = Args;
|
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Info->Flags = ACPI_IGNORE_RETURN_VALUE;
|
|
|
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/*
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* The _REG method has two arguments:
|
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*
|
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* Arg0 - Integer:
|
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* Operation region space ID Same value as RegionObj->Region.SpaceId
|
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*
|
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* Arg1 - Integer:
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* connection status 1 for connecting the handler, 0 for disconnecting
|
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* the handler (Passed as a parameter)
|
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*/
|
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Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
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if (!Args[0])
|
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{
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Status = AE_NO_MEMORY;
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goto Cleanup1;
|
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}
|
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|
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Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
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if (!Args[1])
|
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{
|
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Status = AE_NO_MEMORY;
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goto Cleanup2;
|
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}
|
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|
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Args[2] = NULL; /* Terminate list */
|
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|
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/* Execute the method, no return value */
|
|
|
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ACPI_DEBUG_EXEC (
|
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AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
|
|
|
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Status = AcpiNsEvaluate (Info);
|
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AcpiUtRemoveReference (Args[1]);
|
|
|
|
Cleanup2:
|
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AcpiUtRemoveReference (Args[0]);
|
|
|
|
Cleanup1:
|
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ACPI_FREE (Info);
|
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return_ACPI_STATUS (Status);
|
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}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAddressSpaceDispatch
|
|
*
|
|
* PARAMETERS: RegionObj - Internal region object
|
|
* Function - Read or Write operation
|
|
* RegionOffset - Where in the region to read or write
|
|
* BitWidth - Field width in bits (8, 16, 32, or 64)
|
|
* Value - Pointer to in or out value, must be
|
|
* a full 64-bit integer
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Dispatch an address space or operation region access to
|
|
* a previously installed handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvAddressSpaceDispatch (
|
|
ACPI_OPERAND_OBJECT *RegionObj,
|
|
UINT32 Function,
|
|
UINT32 RegionOffset,
|
|
UINT32 BitWidth,
|
|
UINT64 *Value)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_ADR_SPACE_HANDLER Handler;
|
|
ACPI_ADR_SPACE_SETUP RegionSetup;
|
|
ACPI_OPERAND_OBJECT *HandlerDesc;
|
|
ACPI_OPERAND_OBJECT *RegionObj2;
|
|
void *RegionContext = NULL;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
|
|
|
|
|
|
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
|
|
if (!RegionObj2)
|
|
{
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|
|
/* Ensure that there is a handler associated with this region */
|
|
|
|
HandlerDesc = RegionObj->Region.Handler;
|
|
if (!HandlerDesc)
|
|
{
|
|
ACPI_ERROR ((AE_INFO,
|
|
"No handler for Region [%4.4s] (%p) [%s]",
|
|
AcpiUtGetNodeName (RegionObj->Region.Node),
|
|
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|
|
/*
|
|
* It may be the case that the region has never been initialized.
|
|
* Some types of regions require special init code
|
|
*/
|
|
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
|
|
{
|
|
/* This region has not been initialized yet, do it */
|
|
|
|
RegionSetup = HandlerDesc->AddressSpace.Setup;
|
|
if (!RegionSetup)
|
|
{
|
|
/* No initialization routine, exit with error */
|
|
|
|
ACPI_ERROR ((AE_INFO,
|
|
"No init routine for region(%p) [%s]",
|
|
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
return_ACPI_STATUS (AE_NOT_EXIST);
|
|
}
|
|
|
|
/*
|
|
* We must exit the interpreter because the region setup will
|
|
* potentially execute control methods (for example, the _REG method
|
|
* for this region)
|
|
*/
|
|
AcpiExExitInterpreter ();
|
|
|
|
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
|
|
HandlerDesc->AddressSpace.Context, &RegionContext);
|
|
|
|
/* Re-enter the interpreter */
|
|
|
|
AcpiExEnterInterpreter ();
|
|
|
|
/* Check for failure of the Region Setup */
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"During region initialization: [%s]",
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Region initialization may have been completed by RegionSetup */
|
|
|
|
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
|
|
{
|
|
RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
|
|
|
|
if (RegionObj2->Extra.RegionContext)
|
|
{
|
|
/* The handler for this region was already installed */
|
|
|
|
ACPI_FREE (RegionContext);
|
|
}
|
|
else
|
|
{
|
|
/*
|
|
* Save the returned context for use in all accesses to
|
|
* this particular region
|
|
*/
|
|
RegionObj2->Extra.RegionContext = RegionContext;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* We have everything we need, we can invoke the address space handler */
|
|
|
|
Handler = HandlerDesc->AddressSpace.Handler;
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
|
|
&RegionObj->Region.Handler->AddressSpace, Handler,
|
|
ACPI_FORMAT_NATIVE_UINT (RegionObj->Region.Address + RegionOffset),
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
|
|
if (!(HandlerDesc->AddressSpace.HandlerFlags &
|
|
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
|
|
{
|
|
/*
|
|
* For handlers other than the default (supplied) handlers, we must
|
|
* exit the interpreter because the handler *might* block -- we don't
|
|
* know what it will do, so we can't hold the lock on the intepreter.
|
|
*/
|
|
AcpiExExitInterpreter();
|
|
}
|
|
|
|
/* Call the handler */
|
|
|
|
Status = Handler (Function,
|
|
(RegionObj->Region.Address + RegionOffset), BitWidth, Value,
|
|
HandlerDesc->AddressSpace.Context, RegionObj2->Extra.RegionContext);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status, "Returned by Handler for [%s]",
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
}
|
|
|
|
if (!(HandlerDesc->AddressSpace.HandlerFlags &
|
|
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
|
|
{
|
|
/*
|
|
* We just returned from a non-default handler, we must re-enter the
|
|
* interpreter
|
|
*/
|
|
AcpiExEnterInterpreter ();
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvDetachRegion
|
|
*
|
|
* PARAMETERS: RegionObj - Region Object
|
|
* AcpiNsIsLocked - Namespace Region Already Locked?
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Break the association between the handler and the region
|
|
* this is a two way association.
|
|
*
|
|
******************************************************************************/
|
|
|
|
void
|
|
AcpiEvDetachRegion(
|
|
ACPI_OPERAND_OBJECT *RegionObj,
|
|
BOOLEAN AcpiNsIsLocked)
|
|
{
|
|
ACPI_OPERAND_OBJECT *HandlerObj;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_OPERAND_OBJECT **LastObjPtr;
|
|
ACPI_ADR_SPACE_SETUP RegionSetup;
|
|
void **RegionContext;
|
|
ACPI_OPERAND_OBJECT *RegionObj2;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvDetachRegion);
|
|
|
|
|
|
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
|
|
if (!RegionObj2)
|
|
{
|
|
return_VOID;
|
|
}
|
|
RegionContext = &RegionObj2->Extra.RegionContext;
|
|
|
|
/* Get the address handler from the region object */
|
|
|
|
HandlerObj = RegionObj->Region.Handler;
|
|
if (!HandlerObj)
|
|
{
|
|
/* This region has no handler, all done */
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/* Find this region in the handler's list */
|
|
|
|
ObjDesc = HandlerObj->AddressSpace.RegionList;
|
|
LastObjPtr = &HandlerObj->AddressSpace.RegionList;
|
|
|
|
while (ObjDesc)
|
|
{
|
|
/* Is this the correct Region? */
|
|
|
|
if (ObjDesc == RegionObj)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Removing Region %p from address handler %p\n",
|
|
RegionObj, HandlerObj));
|
|
|
|
/* This is it, remove it from the handler's list */
|
|
|
|
*LastObjPtr = ObjDesc->Region.Next;
|
|
ObjDesc->Region.Next = NULL; /* Must clear field */
|
|
|
|
if (AcpiNsIsLocked)
|
|
{
|
|
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
}
|
|
|
|
/* Now stop region accesses by executing the _REG method */
|
|
|
|
Status = AcpiEvExecuteRegMethod (RegionObj, ACPI_REG_DISCONNECT);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]",
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
}
|
|
|
|
if (AcpiNsIsLocked)
|
|
{
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If the region has been activated, call the setup handler with
|
|
* the deactivate notification
|
|
*/
|
|
if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
|
|
{
|
|
RegionSetup = HandlerObj->AddressSpace.Setup;
|
|
Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
|
|
HandlerObj->AddressSpace.Context, RegionContext);
|
|
|
|
/* Init routine may fail, Just ignore errors */
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
ACPI_EXCEPTION ((AE_INFO, Status,
|
|
"from region handler - deactivate, [%s]",
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
}
|
|
|
|
RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
|
|
}
|
|
|
|
/*
|
|
* Remove handler reference in the region
|
|
*
|
|
* NOTE: this doesn't mean that the region goes away, the region
|
|
* is just inaccessible as indicated to the _REG method
|
|
*
|
|
* If the region is on the handler's list, this must be the
|
|
* region's handler
|
|
*/
|
|
RegionObj->Region.Handler = NULL;
|
|
AcpiUtRemoveReference (HandlerObj);
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
/* Walk the linked list of handlers */
|
|
|
|
LastObjPtr = &ObjDesc->Region.Next;
|
|
ObjDesc = ObjDesc->Region.Next;
|
|
}
|
|
|
|
/* If we get here, the region was not in the handler's region list */
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Cannot remove region %p from address handler %p\n",
|
|
RegionObj, HandlerObj));
|
|
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvAttachRegion
|
|
*
|
|
* PARAMETERS: HandlerObj - Handler Object
|
|
* RegionObj - Region Object
|
|
* AcpiNsIsLocked - Namespace Region Already Locked?
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Create the association between the handler and the region
|
|
* this is a two way association.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvAttachRegion (
|
|
ACPI_OPERAND_OBJECT *HandlerObj,
|
|
ACPI_OPERAND_OBJECT *RegionObj,
|
|
BOOLEAN AcpiNsIsLocked)
|
|
{
|
|
|
|
ACPI_FUNCTION_TRACE (EvAttachRegion);
|
|
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Adding Region [%4.4s] %p to address handler %p [%s]\n",
|
|
AcpiUtGetNodeName (RegionObj->Region.Node),
|
|
RegionObj, HandlerObj,
|
|
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
|
|
|
|
/* Link this region to the front of the handler's list */
|
|
|
|
RegionObj->Region.Next = HandlerObj->AddressSpace.RegionList;
|
|
HandlerObj->AddressSpace.RegionList = RegionObj;
|
|
|
|
/* Install the region's handler */
|
|
|
|
if (RegionObj->Region.Handler)
|
|
{
|
|
return_ACPI_STATUS (AE_ALREADY_EXISTS);
|
|
}
|
|
|
|
RegionObj->Region.Handler = HandlerObj;
|
|
AcpiUtAddReference (HandlerObj);
|
|
|
|
return_ACPI_STATUS (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvInstallHandler
|
|
*
|
|
* PARAMETERS: WalkNamespace callback
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static 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 = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We only care about regions and objects that are allowed to have
|
|
* address space handlers
|
|
*/
|
|
if ((Node->Type != ACPI_TYPE_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 (ObjDesc->Common.Type == ACPI_TYPE_DEVICE)
|
|
{
|
|
/* Check if this Device already has a handler for this address space */
|
|
|
|
NextHandlerObj = ObjDesc->Device.Handler;
|
|
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);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvInstallSpaceHandler
|
|
*
|
|
* PARAMETERS: Node - Namespace node 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.
|
|
* Assumes namespace is locked
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvInstallSpaceHandler (
|
|
ACPI_NAMESPACE_NODE *Node,
|
|
ACPI_ADR_SPACE_TYPE SpaceId,
|
|
ACPI_ADR_SPACE_HANDLER Handler,
|
|
ACPI_ADR_SPACE_SETUP Setup,
|
|
void *Context)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_OPERAND_OBJECT *HandlerObj;
|
|
ACPI_STATUS Status;
|
|
ACPI_OBJECT_TYPE Type;
|
|
UINT8 Flags = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvInstallSpaceHandler);
|
|
|
|
|
|
/*
|
|
* This registration is valid for only the types below and the root. This
|
|
* is where the default handlers get placed.
|
|
*/
|
|
if ((Node->Type != ACPI_TYPE_DEVICE) &&
|
|
(Node->Type != ACPI_TYPE_PROCESSOR) &&
|
|
(Node->Type != ACPI_TYPE_THERMAL) &&
|
|
(Node != AcpiGbl_RootNode))
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (Handler == ACPI_DEFAULT_HANDLER)
|
|
{
|
|
Flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
|
|
|
|
switch (SpaceId)
|
|
{
|
|
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
|
|
Handler = AcpiExSystemMemorySpaceHandler;
|
|
Setup = AcpiEvSystemMemoryRegionSetup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_SYSTEM_IO:
|
|
Handler = AcpiExSystemIoSpaceHandler;
|
|
Setup = AcpiEvIoSpaceRegionSetup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_PCI_CONFIG:
|
|
Handler = AcpiExPciConfigSpaceHandler;
|
|
Setup = AcpiEvPciConfigRegionSetup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_CMOS:
|
|
Handler = AcpiExCmosSpaceHandler;
|
|
Setup = AcpiEvCmosRegionSetup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_PCI_BAR_TARGET:
|
|
Handler = AcpiExPciBarSpaceHandler;
|
|
Setup = AcpiEvPciBarRegionSetup;
|
|
break;
|
|
|
|
case ACPI_ADR_SPACE_DATA_TABLE:
|
|
Handler = AcpiExDataTableSpaceHandler;
|
|
Setup = NULL;
|
|
break;
|
|
|
|
default:
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
|
|
/* If the caller hasn't specified a setup routine, use the default */
|
|
|
|
if (!Setup)
|
|
{
|
|
Setup = AcpiEvDefaultRegionSetup;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (ObjDesc)
|
|
{
|
|
/*
|
|
* The attached device object already exists. Make sure the handler
|
|
* is not already installed.
|
|
*/
|
|
HandlerObj = ObjDesc->Device.Handler;
|
|
|
|
/* Walk the handler list for this device */
|
|
|
|
while (HandlerObj)
|
|
{
|
|
/* Same SpaceId indicates a handler already installed */
|
|
|
|
if (HandlerObj->AddressSpace.SpaceId == SpaceId)
|
|
{
|
|
if (HandlerObj->AddressSpace.Handler == Handler)
|
|
{
|
|
/*
|
|
* It is (relatively) OK to attempt to install the SAME
|
|
* handler twice. This can easily happen with the
|
|
* PCI_Config space.
|
|
*/
|
|
Status = AE_SAME_HANDLER;
|
|
goto UnlockAndExit;
|
|
}
|
|
else
|
|
{
|
|
/* A handler is already installed */
|
|
|
|
Status = AE_ALREADY_EXISTS;
|
|
}
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Walk the linked list of handlers */
|
|
|
|
HandlerObj = HandlerObj->AddressSpace.Next;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Creating object on Device %p while installing handler\n", Node));
|
|
|
|
/* ObjDesc does not exist, create one */
|
|
|
|
if (Node->Type == ACPI_TYPE_ANY)
|
|
{
|
|
Type = ACPI_TYPE_DEVICE;
|
|
}
|
|
else
|
|
{
|
|
Type = Node->Type;
|
|
}
|
|
|
|
ObjDesc = AcpiUtCreateInternalObject (Type);
|
|
if (!ObjDesc)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Init new descriptor */
|
|
|
|
ObjDesc->Common.Type = (UINT8) Type;
|
|
|
|
/* Attach the new object to the Node */
|
|
|
|
Status = AcpiNsAttachObject (Node, ObjDesc, Type);
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
|
|
"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
|
|
AcpiUtGetRegionName (SpaceId), SpaceId,
|
|
AcpiUtGetNodeName (Node), Node, ObjDesc));
|
|
|
|
/*
|
|
* Install the handler
|
|
*
|
|
* At this point there is no existing handler. Just allocate the object
|
|
* for the handler and link it into the list.
|
|
*/
|
|
HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
|
|
if (!HandlerObj)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Init handler obj */
|
|
|
|
HandlerObj->AddressSpace.SpaceId = (UINT8) SpaceId;
|
|
HandlerObj->AddressSpace.HandlerFlags = Flags;
|
|
HandlerObj->AddressSpace.RegionList = NULL;
|
|
HandlerObj->AddressSpace.Node = Node;
|
|
HandlerObj->AddressSpace.Handler = Handler;
|
|
HandlerObj->AddressSpace.Context = Context;
|
|
HandlerObj->AddressSpace.Setup = Setup;
|
|
|
|
/* Install at head of Device.AddressSpace list */
|
|
|
|
HandlerObj->AddressSpace.Next = ObjDesc->Device.Handler;
|
|
|
|
/*
|
|
* The Device object is the first reference on the HandlerObj.
|
|
* Each region that uses the handler adds a reference.
|
|
*/
|
|
ObjDesc->Device.Handler = HandlerObj;
|
|
|
|
/*
|
|
* Walk the namespace finding all of the regions this
|
|
* handler will manage.
|
|
*
|
|
* Start at the device and search the branch toward
|
|
* the leaf nodes until either the leaf is encountered or
|
|
* a device is detected that has an address handler of the
|
|
* same type.
|
|
*
|
|
* In either case, back up and search down the remainder
|
|
* of the branch
|
|
*/
|
|
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
|
|
ACPI_NS_WALK_UNLOCK, AcpiEvInstallHandler, NULL,
|
|
HandlerObj, NULL);
|
|
|
|
UnlockAndExit:
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvExecuteRegMethods
|
|
*
|
|
* PARAMETERS: Node - Namespace node for the device
|
|
* SpaceId - The address space ID
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Run all _REG methods for the input Space ID;
|
|
* Note: assumes namespace is locked, or system init time.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiEvExecuteRegMethods (
|
|
ACPI_NAMESPACE_NODE *Node,
|
|
ACPI_ADR_SPACE_TYPE SpaceId)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvExecuteRegMethods);
|
|
|
|
|
|
/*
|
|
* Run all _REG methods for all Operation Regions for this space ID. This
|
|
* is a separate walk in order to handle any interdependencies between
|
|
* regions and _REG methods. (i.e. handlers must be installed for all
|
|
* regions of this Space ID before we can run any _REG methods)
|
|
*/
|
|
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
|
|
ACPI_NS_WALK_UNLOCK, AcpiEvRegRun, NULL,
|
|
&SpaceId, NULL);
|
|
|
|
/* Special case for EC: handle "orphan" _REG methods with no region */
|
|
|
|
if (SpaceId == ACPI_ADR_SPACE_EC)
|
|
{
|
|
AcpiEvOrphanEcRegMethod ();
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvRegRun
|
|
*
|
|
* PARAMETERS: WalkNamespace callback
|
|
*
|
|
* DESCRIPTION: Run _REG method for region objects of the requested spaceID
|
|
*
|
|
******************************************************************************/
|
|
|
|
static ACPI_STATUS
|
|
AcpiEvRegRun (
|
|
ACPI_HANDLE ObjHandle,
|
|
UINT32 Level,
|
|
void *Context,
|
|
void **ReturnValue)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_ADR_SPACE_TYPE SpaceId;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
SpaceId = *ACPI_CAST_PTR (ACPI_ADR_SPACE_TYPE, Context);
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
Node = AcpiNsValidateHandle (ObjHandle);
|
|
if (!Node)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* We only care about regions.and objects that are allowed to have address
|
|
* space handlers
|
|
*/
|
|
if ((Node->Type != ACPI_TYPE_REGION) &&
|
|
(Node != AcpiGbl_RootNode))
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
/* No object, just exit */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Object is a Region */
|
|
|
|
if (ObjDesc->Region.SpaceId != SpaceId)
|
|
{
|
|
/* This region is for a different address space, just ignore it */
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
Status = AcpiEvExecuteRegMethod (ObjDesc, ACPI_REG_CONNECT);
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiEvOrphanEcRegMethod
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Execute an "orphan" _REG method that appears under the EC
|
|
* device. This is a _REG method that has no corresponding region
|
|
* within the EC device scope. The orphan _REG method appears to
|
|
* have been enabled by the description of the ECDT in the ACPI
|
|
* specification: "The availability of the region space can be
|
|
* detected by providing a _REG method object underneath the
|
|
* Embedded Controller device."
|
|
*
|
|
* To quickly access the EC device, we use the EC_ID that appears
|
|
* within the ECDT. Otherwise, we would need to perform a time-
|
|
* consuming namespace walk, executing _HID methods to find the
|
|
* EC device.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void
|
|
AcpiEvOrphanEcRegMethod (
|
|
void)
|
|
{
|
|
ACPI_TABLE_ECDT *Table;
|
|
ACPI_STATUS Status;
|
|
ACPI_OBJECT_LIST Args;
|
|
ACPI_OBJECT Objects[2];
|
|
ACPI_NAMESPACE_NODE *EcDeviceNode;
|
|
ACPI_NAMESPACE_NODE *RegMethod;
|
|
ACPI_NAMESPACE_NODE *NextNode;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (EvOrphanEcRegMethod);
|
|
|
|
|
|
/* Get the ECDT (if present in system) */
|
|
|
|
Status = AcpiGetTable (ACPI_SIG_ECDT, 0,
|
|
ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Table));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* We need a valid EC_ID string */
|
|
|
|
if (!(*Table->Id))
|
|
{
|
|
return_VOID;
|
|
}
|
|
|
|
/* Namespace is currently locked, must release */
|
|
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
|
|
/* Get a handle to the EC device referenced in the ECDT */
|
|
|
|
Status = AcpiGetHandle (NULL,
|
|
ACPI_CAST_PTR (char, Table->Id),
|
|
ACPI_CAST_PTR (ACPI_HANDLE, &EcDeviceNode));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/* Get a handle to a _REG method immediately under the EC device */
|
|
|
|
Status = AcpiGetHandle (EcDeviceNode,
|
|
METHOD_NAME__REG, ACPI_CAST_PTR (ACPI_HANDLE, &RegMethod));
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto Exit;
|
|
}
|
|
|
|
/*
|
|
* Execute the _REG method only if there is no Operation Region in
|
|
* this scope with the Embedded Controller space ID. Otherwise, it
|
|
* will already have been executed. Note, this allows for Regions
|
|
* with other space IDs to be present; but the code below will then
|
|
* execute the _REG method with the EC space ID argument.
|
|
*/
|
|
NextNode = AcpiNsGetNextNode (EcDeviceNode, NULL);
|
|
while (NextNode)
|
|
{
|
|
if ((NextNode->Type == ACPI_TYPE_REGION) &&
|
|
(NextNode->Object) &&
|
|
(NextNode->Object->Region.SpaceId == ACPI_ADR_SPACE_EC))
|
|
{
|
|
goto Exit; /* Do not execute _REG */
|
|
}
|
|
NextNode = AcpiNsGetNextNode (EcDeviceNode, NextNode);
|
|
}
|
|
|
|
/* Evaluate the _REG(EC,Connect) method */
|
|
|
|
Args.Count = 2;
|
|
Args.Pointer = Objects;
|
|
Objects[0].Type = ACPI_TYPE_INTEGER;
|
|
Objects[0].Integer.Value = ACPI_ADR_SPACE_EC;
|
|
Objects[1].Type = ACPI_TYPE_INTEGER;
|
|
Objects[1].Integer.Value = ACPI_REG_CONNECT;
|
|
|
|
Status = AcpiEvaluateObject (RegMethod, NULL, &Args, NULL);
|
|
|
|
Exit:
|
|
/* We ignore all errors from above, don't care */
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
return_VOID;
|
|
}
|