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https://github.com/acpica/acpica/
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851c390750
Support for 16-bit ACPICA has been completely removed since it is no longer necessary and it clutters the code. All 16-bit macros, types, and conditional compiles have been removed, cleaning up and simplifying the code across the entire subsystem. DOS support is no longer needed since the Linux firmware kit is now available.
751 lines
23 KiB
C
751 lines
23 KiB
C
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/******************************************************************************
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*
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* Name: hwsleep.c - ACPI Hardware Sleep/Wake Interface
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* $Revision: 1.86 $
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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 - 2006, 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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#include "acpi.h"
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#include "actables.h"
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwsleep")
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/*******************************************************************************
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*
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* FUNCTION: AcpiSetFirmwareWakingVector
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*
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* PARAMETERS: PhysicalAddress - Physical address of ACPI real mode
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* entry point.
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*
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* RETURN: Status
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*
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* DESCRIPTION: Access function for the FirmwareWakingVector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiSetFirmwareWakingVector (
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ACPI_PHYSICAL_ADDRESS PhysicalAddress)
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{
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ACPI_TABLE_FACS *Facs;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiSetFirmwareWakingVector);
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/* Get the FACS */
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Status = AcpiGetTableByIndex (ACPI_TABLE_INDEX_FACS, (ACPI_TABLE_HEADER **) &Facs);
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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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/* Set the vector */
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if ((Facs->Length < 32) ||
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(!(Facs->XFirmwareWakingVector)))
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{
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/*
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* ACPI 1.0 FACS or short table or optional X_ field is zero
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*/
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Facs->FirmwareWakingVector = (UINT32) PhysicalAddress;
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}
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else
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{
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/*
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* ACPI 2.0 FACS with valid X_ field
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*/
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Facs->XFirmwareWakingVector = PhysicalAddress;
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}
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiSetFirmwareWakingVector)
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetFirmwareWakingVector
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*
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* PARAMETERS: *PhysicalAddress - Where the contents of
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* the FirmwareWakingVector field of
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* the FACS will be returned.
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*
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* RETURN: Status, vector
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*
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* DESCRIPTION: Access function for the FirmwareWakingVector field in FACS
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetFirmwareWakingVector (
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ACPI_PHYSICAL_ADDRESS *PhysicalAddress)
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{
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ACPI_TABLE_FACS *Facs;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiGetFirmwareWakingVector);
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if (!PhysicalAddress)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Get the FACS */
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Status = AcpiGetTableByIndex (ACPI_TABLE_INDEX_FACS, (ACPI_TABLE_HEADER **) &Facs);
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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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/* Get the vector */
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if ((Facs->Length < 32) ||
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(!(Facs->XFirmwareWakingVector)))
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{
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/*
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* ACPI 1.0 FACS or short table or optional X_ field is zero
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*/
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*PhysicalAddress =
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(ACPI_PHYSICAL_ADDRESS) Facs->FirmwareWakingVector;
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}
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else
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{
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/*
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* ACPI 2.0 FACS with valid X_ field
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*/
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*PhysicalAddress = (ACPI_PHYSICAL_ADDRESS) Facs->XFirmwareWakingVector;
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}
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetFirmwareWakingVector)
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/*******************************************************************************
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*
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* FUNCTION: AcpiEnterSleepStatePrep
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*
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* PARAMETERS: SleepState - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Prepare to enter a system sleep state (see ACPI 2.0 spec p 231)
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* This function must execute with interrupts enabled.
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* We break sleeping into 2 stages so that OSPM can handle
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* various OS-specific tasks between the two steps.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEnterSleepStatePrep (
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UINT8 SleepState)
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{
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ACPI_STATUS Status;
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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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ACPI_FUNCTION_TRACE (AcpiEnterSleepStatePrep);
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/*
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* _PSW methods could be run here to enable wake-on keyboard, LAN, etc.
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*/
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Status = AcpiGetSleepTypeData (SleepState,
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&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
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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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/* Setup parameter object */
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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Arg.Type = ACPI_TYPE_INTEGER;
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Arg.Integer.Value = SleepState;
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/* Run the _PTS and _GTS methods */
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__PTS, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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return_ACPI_STATUS (Status);
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}
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__GTS, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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return_ACPI_STATUS (Status);
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}
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/* Setup the argument to _SST */
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switch (SleepState)
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{
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case ACPI_STATE_S0:
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Arg.Integer.Value = ACPI_SST_WORKING;
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break;
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case ACPI_STATE_S1:
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case ACPI_STATE_S2:
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case ACPI_STATE_S3:
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Arg.Integer.Value = ACPI_SST_SLEEPING;
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break;
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case ACPI_STATE_S4:
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Arg.Integer.Value = ACPI_SST_SLEEP_CONTEXT;
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break;
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default:
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Arg.Integer.Value = ACPI_SST_INDICATOR_OFF; /* Default is off */
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break;
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}
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/* Set the system indicators to show the desired sleep state. */
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "While executing method _SST"));
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}
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiEnterSleepStatePrep)
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/*******************************************************************************
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*
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* FUNCTION: AcpiEnterSleepState
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*
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* PARAMETERS: SleepState - Which sleep state to enter
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enter a system sleep state (see ACPI 2.0 spec p 231)
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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEnterSleepState (
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UINT8 SleepState)
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{
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UINT32 PM1AControl;
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UINT32 PM1BControl;
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ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
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ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
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UINT32 InValue;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiEnterSleepState);
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if ((AcpiGbl_SleepTypeA > ACPI_SLEEP_TYPE_MAX) ||
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(AcpiGbl_SleepTypeB > ACPI_SLEEP_TYPE_MAX))
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{
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ACPI_ERROR ((AE_INFO, "Sleep values out of range: A=%X B=%X",
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AcpiGbl_SleepTypeA, AcpiGbl_SleepTypeB));
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return_ACPI_STATUS (AE_AML_OPERAND_VALUE);
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}
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SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE_A);
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SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
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/* Clear wake status */
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Status = AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1);
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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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/* Clear all fixed and general purpose status bits */
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Status = AcpiHwClearAcpiStatus ();
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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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if (SleepState != ACPI_STATE_S5)
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{
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/* Disable BM arbitration */
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Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 1);
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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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/*
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* 1) Disable/Clear all GPEs
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* 2) Enable all wakeup GPEs
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*/
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Status = AcpiHwDisableAllGpes ();
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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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AcpiGbl_SystemAwakeAndRunning = FALSE;
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Status = AcpiHwEnableAllWakeupGpes ();
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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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/* Get current value of PM1A control */
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Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_CONTROL, &PM1AControl);
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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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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"Entering sleep state [S%d]\n", SleepState));
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/* Clear SLP_EN and SLP_TYP fields */
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PM1AControl &= ~(SleepTypeRegInfo->AccessBitMask |
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SleepEnableRegInfo->AccessBitMask);
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PM1BControl = PM1AControl;
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/* Insert SLP_TYP bits */
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PM1AControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
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PM1BControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
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/*
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* We split the writes of SLP_TYP and SLP_EN to workaround
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* poorly implemented hardware.
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*/
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/* Write #1: fill in SLP_TYP data */
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
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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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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1B_CONTROL, PM1BControl);
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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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/* Insert SLP_ENABLE bit */
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PM1AControl |= SleepEnableRegInfo->AccessBitMask;
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PM1BControl |= SleepEnableRegInfo->AccessBitMask;
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/* Write #2: SLP_TYP + SLP_EN */
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ACPI_FLUSH_CPU_CACHE ();
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
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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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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1B_CONTROL, PM1BControl);
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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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if (SleepState > ACPI_STATE_S3)
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{
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/*
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* We wanted to sleep > S3, but it didn't happen (by virtue of the
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* fact that we are still executing!)
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*
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* Wait ten seconds, then try again. This is to get S4/S5 to work on
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* all machines.
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*
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* We wait so long to allow chipsets that poll this reg very slowly to
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* still read the right value. Ideally, this block would go
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* away entirely.
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*/
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AcpiOsStall (10000000);
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_CONTROL,
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SleepEnableRegInfo->AccessBitMask);
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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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/* Wait until we enter sleep state */
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do
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{
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Status = AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
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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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/* Spin until we wake */
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} while (!InValue);
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiEnterSleepState)
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/*******************************************************************************
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*
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* FUNCTION: AcpiEnterSleepStateS4bios
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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: Perform a S4 bios request.
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* THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiEnterSleepStateS4bios (
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void)
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{
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UINT32 InValue;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiEnterSleepStateS4bios);
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Status = AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1);
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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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Status = AcpiHwClearAcpiStatus ();
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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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* 1) Disable/Clear all GPEs
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* 2) Enable all wakeup GPEs
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*/
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Status = AcpiHwDisableAllGpes ();
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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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AcpiGbl_SystemAwakeAndRunning = FALSE;
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Status = AcpiHwEnableAllWakeupGpes ();
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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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ACPI_FLUSH_CPU_CACHE ();
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Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand,
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(UINT32) AcpiGbl_FADT.S4BiosRequest, 8);
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do {
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AcpiOsStall(1000);
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Status = AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &InValue);
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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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} while (!InValue);
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return_ACPI_STATUS (AE_OK);
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}
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ACPI_EXPORT_SYMBOL (AcpiEnterSleepStateS4bios)
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/*******************************************************************************
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*
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* FUNCTION: AcpiLeaveSleepState
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*
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* PARAMETERS: SleepState - Which sleep state we just exited
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*
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* RETURN: Status
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*
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* DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
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* Called with interrupts ENABLED.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiLeaveSleepState (
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UINT8 SleepState)
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{
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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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ACPI_STATUS Status;
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ACPI_BIT_REGISTER_INFO *SleepTypeRegInfo;
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ACPI_BIT_REGISTER_INFO *SleepEnableRegInfo;
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UINT32 PM1AControl;
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UINT32 PM1BControl;
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ACPI_FUNCTION_TRACE (AcpiLeaveSleepState);
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/*
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* Set SLP_TYPE and SLP_EN to state S0.
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* This is unclear from the ACPI Spec, but it is required
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* by some machines.
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*/
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Status = AcpiGetSleepTypeData (ACPI_STATE_S0,
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&AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB);
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if (ACPI_SUCCESS (Status))
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{
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SleepTypeRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_TYPE_A);
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SleepEnableRegInfo = AcpiHwGetBitRegisterInfo (ACPI_BITREG_SLEEP_ENABLE);
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/* Get current value of PM1A control */
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Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_CONTROL, &PM1AControl);
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if (ACPI_SUCCESS (Status))
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{
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/* Clear SLP_EN and SLP_TYP fields */
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PM1AControl &= ~(SleepTypeRegInfo->AccessBitMask |
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SleepEnableRegInfo->AccessBitMask);
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PM1BControl = PM1AControl;
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/* Insert SLP_TYP bits */
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PM1AControl |= (AcpiGbl_SleepTypeA << SleepTypeRegInfo->BitPosition);
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PM1BControl |= (AcpiGbl_SleepTypeB << SleepTypeRegInfo->BitPosition);
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/* Just ignore any errors */
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(void) AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1A_CONTROL, PM1AControl);
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(void) AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1B_CONTROL, PM1BControl);
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}
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}
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/* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
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AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
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/* Setup parameter object */
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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Arg.Type = ACPI_TYPE_INTEGER;
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/* Ignore any errors from these methods */
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Arg.Integer.Value = ACPI_SST_WAKING;
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST"));
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}
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Arg.Integer.Value = SleepState;
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__BFS, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During Method _BFS"));
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}
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__WAK, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During Method _WAK"));
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}
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/* TBD: _WAK "sometimes" returns stuff - do we want to look at it? */
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/*
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* Restore the GPEs:
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* 1) Disable/Clear all GPEs
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* 2) Enable all runtime GPEs
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*/
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Status = AcpiHwDisableAllGpes ();
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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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AcpiGbl_SystemAwakeAndRunning = TRUE;
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Status = AcpiHwEnableAllRuntimeGpes ();
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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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/* Enable power button */
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(void) AcpiSetRegister(
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AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].EnableRegisterId, 1);
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(void) AcpiSetRegister(
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AcpiGbl_FixedEventInfo[ACPI_EVENT_POWER_BUTTON].StatusRegisterId, 1);
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/* Enable BM arbitration */
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Status = AcpiSetRegister (ACPI_BITREG_ARB_DISABLE, 0);
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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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Arg.Integer.Value = ACPI_SST_WORKING;
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Status = AcpiEvaluateObject (NULL, METHOD_NAME__SST, &ArgList, NULL);
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if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
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{
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ACPI_EXCEPTION ((AE_INFO, Status, "During Method _SST"));
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}
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiLeaveSleepState)
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