1002 lines
30 KiB
C
1002 lines
30 KiB
C
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/*******************************************************************************
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*
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* Module Name: hwregs - Read/write access functions for the various ACPI
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* control and status registers.
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* $Revision: 1.187 $
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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 - 2007, 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 __HWREGS_C__
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#include <contrib/dev/acpica/acpi.h>
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#include <contrib/dev/acpica/acnamesp.h>
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#include <contrib/dev/acpica/acevents.h>
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#define _COMPONENT ACPI_HARDWARE
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ACPI_MODULE_NAME ("hwregs")
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/*******************************************************************************
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*
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* FUNCTION: AcpiHwClearAcpiStatus
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*
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* PARAMETERS: None
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*
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* RETURN: None
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*
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* DESCRIPTION: Clears all fixed and general purpose status bits
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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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AcpiHwClearAcpiStatus (
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void)
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{
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS LockFlags = 0;
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ACPI_FUNCTION_TRACE (HwClearAcpiStatus);
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ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %04X to %04X\n",
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ACPI_BITMASK_ALL_FIXED_STATUS,
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(UINT16) AcpiGbl_FADT.XPm1aEventBlock.Address));
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LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_STATUS,
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ACPI_BITMASK_ALL_FIXED_STATUS);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/* Clear the fixed events */
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if (AcpiGbl_FADT.XPm1bEventBlock.Address)
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{
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Status = AcpiHwLowLevelWrite (16, ACPI_BITMASK_ALL_FIXED_STATUS,
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&AcpiGbl_FADT.XPm1bEventBlock);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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}
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/* Clear the GPE Bits in all GPE registers in all GPE blocks */
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Status = AcpiEvWalkGpeList (AcpiHwClearGpeBlock);
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UnlockAndExit:
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AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
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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: AcpiGetSleepTypeData
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*
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* PARAMETERS: SleepState - Numeric sleep state
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* *SleepTypeA - Where SLP_TYPa is returned
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* *SleepTypeB - Where SLP_TYPb is returned
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*
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* RETURN: Status - ACPI status
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*
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* DESCRIPTION: Obtain the SLP_TYPa and SLP_TYPb values for the requested sleep
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* state.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetSleepTypeData (
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UINT8 SleepState,
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UINT8 *SleepTypeA,
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UINT8 *SleepTypeB)
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{
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ACPI_STATUS Status = AE_OK;
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ACPI_EVALUATE_INFO *Info;
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ACPI_FUNCTION_TRACE (AcpiGetSleepTypeData);
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/* Validate parameters */
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if ((SleepState > ACPI_S_STATES_MAX) ||
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!SleepTypeA || !SleepTypeB)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Allocate the evaluation information block */
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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->Pathname = ACPI_CAST_PTR (char, AcpiGbl_SleepStateNames[SleepState]);
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/* Evaluate the namespace object containing the values for this state */
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Status = AcpiNsEvaluate (Info);
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if (ACPI_FAILURE (Status))
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_EXEC,
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"%s while evaluating SleepState [%s]\n",
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AcpiFormatException (Status), Info->Pathname));
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goto Cleanup;
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}
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/* Must have a return object */
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if (!Info->ReturnObject)
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{
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ACPI_ERROR ((AE_INFO, "No Sleep State object returned from [%s]",
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Info->Pathname));
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Status = AE_NOT_EXIST;
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}
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/* It must be of type Package */
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else if (ACPI_GET_OBJECT_TYPE (Info->ReturnObject) != ACPI_TYPE_PACKAGE)
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{
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ACPI_ERROR ((AE_INFO, "Sleep State return object is not a Package"));
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Status = AE_AML_OPERAND_TYPE;
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}
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/*
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* The package must have at least two elements. NOTE (March 2005): This
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* goes against the current ACPI spec which defines this object as a
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* package with one encoded DWORD element. However, existing practice
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* by BIOS vendors seems to be to have 2 or more elements, at least
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* one per sleep type (A/B).
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*/
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else if (Info->ReturnObject->Package.Count < 2)
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{
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ACPI_ERROR ((AE_INFO,
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"Sleep State return package does not have at least two elements"));
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Status = AE_AML_NO_OPERAND;
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}
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/* The first two elements must both be of type Integer */
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else if ((ACPI_GET_OBJECT_TYPE (Info->ReturnObject->Package.Elements[0])
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!= ACPI_TYPE_INTEGER) ||
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(ACPI_GET_OBJECT_TYPE (Info->ReturnObject->Package.Elements[1])
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!= ACPI_TYPE_INTEGER))
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{
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ACPI_ERROR ((AE_INFO,
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"Sleep State return package elements are not both Integers (%s, %s)",
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AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[0]),
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AcpiUtGetObjectTypeName (Info->ReturnObject->Package.Elements[1])));
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Status = AE_AML_OPERAND_TYPE;
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}
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else
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{
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/* Valid _Sx_ package size, type, and value */
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*SleepTypeA = (UINT8)
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(Info->ReturnObject->Package.Elements[0])->Integer.Value;
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*SleepTypeB = (UINT8)
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(Info->ReturnObject->Package.Elements[1])->Integer.Value;
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}
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if (ACPI_FAILURE (Status))
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{
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ACPI_EXCEPTION ((AE_INFO, Status,
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"While evaluating SleepState [%s], bad Sleep object %p type %s",
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Info->Pathname, Info->ReturnObject,
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AcpiUtGetObjectTypeName (Info->ReturnObject)));
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}
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AcpiUtRemoveReference (Info->ReturnObject);
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Cleanup:
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ACPI_FREE (Info);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetSleepTypeData)
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/*******************************************************************************
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*
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* FUNCTION: AcpiHwGetRegisterBitMask
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*
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* PARAMETERS: RegisterId - Index of ACPI Register to access
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*
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* RETURN: The bitmask to be used when accessing the register
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*
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* DESCRIPTION: Map RegisterId into a register bitmask.
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*
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******************************************************************************/
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ACPI_BIT_REGISTER_INFO *
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AcpiHwGetBitRegisterInfo (
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UINT32 RegisterId)
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{
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ACPI_FUNCTION_ENTRY ();
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if (RegisterId > ACPI_BITREG_MAX)
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{
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ACPI_ERROR ((AE_INFO, "Invalid BitRegister ID: %X", RegisterId));
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return (NULL);
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}
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return (&AcpiGbl_BitRegisterInfo[RegisterId]);
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}
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/*******************************************************************************
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*
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* FUNCTION: AcpiGetRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI BitRegister to access
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* ReturnValue - Value that was read from the register
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*
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* RETURN: Status and the value read from specified Register. Value
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* returned is normalized to bit0 (is shifted all the way right)
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*
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* DESCRIPTION: ACPI BitRegister read function.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiGetRegister (
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UINT32 RegisterId,
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UINT32 *ReturnValue)
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{
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UINT32 RegisterValue = 0;
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (AcpiGetRegister);
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/* Read from the register */
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Status = AcpiHwRegisterRead (ACPI_MTX_LOCK,
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BitRegInfo->ParentRegister, &RegisterValue);
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if (ACPI_SUCCESS (Status))
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{
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/* Normalize the value that was read */
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RegisterValue = ((RegisterValue & BitRegInfo->AccessBitMask)
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>> BitRegInfo->BitPosition);
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*ReturnValue = RegisterValue;
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ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Read value %8.8X register %X\n",
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RegisterValue, BitRegInfo->ParentRegister));
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}
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiGetRegister)
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/*******************************************************************************
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*
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* FUNCTION: AcpiSetRegister
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*
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* PARAMETERS: RegisterId - ID of ACPI BitRegister to access
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* Value - (only used on write) value to write to the
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* Register, NOT pre-normalized to the bit pos
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*
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* RETURN: Status
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*
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* DESCRIPTION: ACPI Bit Register write function.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiSetRegister (
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UINT32 RegisterId,
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UINT32 Value)
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{
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UINT32 RegisterValue = 0;
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ACPI_BIT_REGISTER_INFO *BitRegInfo;
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ACPI_STATUS Status;
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ACPI_CPU_FLAGS LockFlags;
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|
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ACPI_FUNCTION_TRACE_U32 (AcpiSetRegister, RegisterId);
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|
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/* Get the info structure corresponding to the requested ACPI Register */
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BitRegInfo = AcpiHwGetBitRegisterInfo (RegisterId);
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if (!BitRegInfo)
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{
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ACPI_ERROR ((AE_INFO, "Bad ACPI HW RegisterId: %X", RegisterId));
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
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/* Always do a register read first so we can insert the new bits */
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Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
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BitRegInfo->ParentRegister, &RegisterValue);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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/*
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* Decode the Register ID
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* Register ID = [Register block ID] | [bit ID]
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*
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* Check bit ID to fine locate Register offset.
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* Check Mask to determine Register offset, and then read-write.
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*/
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switch (BitRegInfo->ParentRegister)
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{
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case ACPI_REGISTER_PM1_STATUS:
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/*
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* Status Registers are different from the rest. Clear by
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* writing 1, and writing 0 has no effect. So, the only relevant
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* information is the single bit we're interested in, all others should
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* be written as 0 so they will be left unchanged.
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*/
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Value = ACPI_REGISTER_PREPARE_BITS (Value,
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BitRegInfo->BitPosition, BitRegInfo->AccessBitMask);
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if (Value)
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{
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_STATUS, (UINT16) Value);
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RegisterValue = 0;
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}
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break;
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case ACPI_REGISTER_PM1_ENABLE:
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ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
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BitRegInfo->AccessBitMask, Value);
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_ENABLE, (UINT16) RegisterValue);
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break;
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case ACPI_REGISTER_PM1_CONTROL:
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/*
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* Write the PM1 Control register.
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* Note that at this level, the fact that there are actually TWO
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* registers (A and B - and B may not exist) is abstracted.
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*/
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ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM1 control: Read %X\n",
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RegisterValue));
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ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
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BitRegInfo->AccessBitMask, Value);
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Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM1_CONTROL, (UINT16) RegisterValue);
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break;
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case ACPI_REGISTER_PM2_CONTROL:
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Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
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ACPI_REGISTER_PM2_CONTROL, &RegisterValue);
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if (ACPI_FAILURE (Status))
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{
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goto UnlockAndExit;
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_IO, "PM2 control: Read %X from %8.8X%8.8X\n",
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RegisterValue,
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ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XPm2ControlBlock.Address)));
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ACPI_REGISTER_INSERT_VALUE (RegisterValue, BitRegInfo->BitPosition,
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BitRegInfo->AccessBitMask, Value);
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|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_IO, "About to write %4.4X to %8.8X%8.8X\n",
|
|
RegisterValue,
|
|
ACPI_FORMAT_UINT64 (AcpiGbl_FADT.XPm2ControlBlock.Address)));
|
|
|
|
Status = AcpiHwRegisterWrite (ACPI_MTX_DO_NOT_LOCK,
|
|
ACPI_REGISTER_PM2_CONTROL, (UINT8) (RegisterValue));
|
|
break;
|
|
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
|
|
AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
|
|
|
|
/* Normalize the value that was read */
|
|
|
|
ACPI_DEBUG_EXEC (RegisterValue =
|
|
((RegisterValue & BitRegInfo->AccessBitMask) >>
|
|
BitRegInfo->BitPosition));
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_IO, "Set bits: %8.8X actual %8.8X register %X\n",
|
|
Value, RegisterValue, BitRegInfo->ParentRegister));
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiSetRegister)
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiHwRegisterRead
|
|
*
|
|
* PARAMETERS: UseLock - Lock hardware? True/False
|
|
* RegisterId - ACPI Register ID
|
|
* ReturnValue - Where the register value is returned
|
|
*
|
|
* RETURN: Status and the value read.
|
|
*
|
|
* DESCRIPTION: Read from the specified ACPI register
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiHwRegisterRead (
|
|
BOOLEAN UseLock,
|
|
UINT32 RegisterId,
|
|
UINT32 *ReturnValue)
|
|
{
|
|
UINT32 Value1 = 0;
|
|
UINT32 Value2 = 0;
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS LockFlags = 0;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (HwRegisterRead);
|
|
|
|
|
|
if (ACPI_MTX_LOCK == UseLock)
|
|
{
|
|
LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
|
|
}
|
|
|
|
switch (RegisterId)
|
|
{
|
|
case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT.XPm1aEventBlock);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* PM1B is optional */
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT.XPm1bEventBlock);
|
|
Value1 |= Value2;
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_XPm1aEnable);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* PM1B is optional */
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_XPm1bEnable);
|
|
Value1 |= Value2;
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value1, &AcpiGbl_FADT.XPm1aControlBlock);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiHwLowLevelRead (16, &Value2, &AcpiGbl_FADT.XPm1bControlBlock);
|
|
Value1 |= Value2;
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
|
|
|
|
Status = AcpiHwLowLevelRead (8, &Value1, &AcpiGbl_FADT.XPm2ControlBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
|
|
|
|
Status = AcpiHwLowLevelRead (32, &Value1, &AcpiGbl_FADT.XPmTimerBlock);
|
|
break;
|
|
|
|
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
|
|
|
|
Status = AcpiOsReadPort (AcpiGbl_FADT.SmiCommand, &Value1, 8);
|
|
break;
|
|
|
|
default:
|
|
ACPI_ERROR ((AE_INFO, "Unknown Register ID: %X",
|
|
RegisterId));
|
|
Status = AE_BAD_PARAMETER;
|
|
break;
|
|
}
|
|
|
|
UnlockAndExit:
|
|
if (ACPI_MTX_LOCK == UseLock)
|
|
{
|
|
AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
|
|
}
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
*ReturnValue = Value1;
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiHwRegisterWrite
|
|
*
|
|
* PARAMETERS: UseLock - Lock hardware? True/False
|
|
* RegisterId - ACPI Register ID
|
|
* Value - The value to write
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Write to the specified ACPI register
|
|
*
|
|
* NOTE: In accordance with the ACPI specification, this function automatically
|
|
* preserves the value of the following bits, meaning that these bits cannot be
|
|
* changed via this interface:
|
|
*
|
|
* PM1_CONTROL[0] = SCI_EN
|
|
* PM1_CONTROL[9]
|
|
* PM1_STATUS[11]
|
|
*
|
|
* ACPI References:
|
|
* 1) Hardware Ignored Bits: When software writes to a register with ignored
|
|
* bit fields, it preserves the ignored bit fields
|
|
* 2) SCI_EN: OSPM always preserves this bit position
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiHwRegisterWrite (
|
|
BOOLEAN UseLock,
|
|
UINT32 RegisterId,
|
|
UINT32 Value)
|
|
{
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS LockFlags = 0;
|
|
UINT32 ReadValue;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (HwRegisterWrite);
|
|
|
|
|
|
if (ACPI_MTX_LOCK == UseLock)
|
|
{
|
|
LockFlags = AcpiOsAcquireLock (AcpiGbl_HardwareLock);
|
|
}
|
|
|
|
switch (RegisterId)
|
|
{
|
|
case ACPI_REGISTER_PM1_STATUS: /* 16-bit access */
|
|
|
|
/* Perform a read first to preserve certain bits (per ACPI spec) */
|
|
|
|
Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
|
|
ACPI_REGISTER_PM1_STATUS, &ReadValue);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Insert the bits to be preserved */
|
|
|
|
ACPI_INSERT_BITS (Value, ACPI_PM1_STATUS_PRESERVED_BITS, ReadValue);
|
|
|
|
/* Now we can write the data */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1aEventBlock);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* PM1B is optional */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1bEventBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1_ENABLE: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1aEnable);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* PM1B is optional */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_XPm1bEnable);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1_CONTROL: /* 16-bit access */
|
|
|
|
/*
|
|
* Perform a read first to preserve certain bits (per ACPI spec)
|
|
*
|
|
* Note: This includes SCI_EN, we never want to change this bit
|
|
*/
|
|
Status = AcpiHwRegisterRead (ACPI_MTX_DO_NOT_LOCK,
|
|
ACPI_REGISTER_PM1_CONTROL, &ReadValue);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Insert the bits to be preserved */
|
|
|
|
ACPI_INSERT_BITS (Value, ACPI_PM1_CONTROL_PRESERVED_BITS, ReadValue);
|
|
|
|
/* Now we can write the data */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1aControlBlock);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1bControlBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1A_CONTROL: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1aControlBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM1B_CONTROL: /* 16-bit access */
|
|
|
|
Status = AcpiHwLowLevelWrite (16, Value, &AcpiGbl_FADT.XPm1bControlBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM2_CONTROL: /* 8-bit access */
|
|
|
|
Status = AcpiHwLowLevelWrite (8, Value, &AcpiGbl_FADT.XPm2ControlBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_PM_TIMER: /* 32-bit access */
|
|
|
|
Status = AcpiHwLowLevelWrite (32, Value, &AcpiGbl_FADT.XPmTimerBlock);
|
|
break;
|
|
|
|
|
|
case ACPI_REGISTER_SMI_COMMAND_BLOCK: /* 8-bit access */
|
|
|
|
/* SMI_CMD is currently always in IO space */
|
|
|
|
Status = AcpiOsWritePort (AcpiGbl_FADT.SmiCommand, Value, 8);
|
|
break;
|
|
|
|
|
|
default:
|
|
Status = AE_BAD_PARAMETER;
|
|
break;
|
|
}
|
|
|
|
UnlockAndExit:
|
|
if (ACPI_MTX_LOCK == UseLock)
|
|
{
|
|
AcpiOsReleaseLock (AcpiGbl_HardwareLock, LockFlags);
|
|
}
|
|
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiHwLowLevelRead
|
|
*
|
|
* PARAMETERS: Width - 8, 16, or 32
|
|
* Value - Where the value is returned
|
|
* Reg - GAS register structure
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Read from either memory or IO space.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiHwLowLevelRead (
|
|
UINT32 Width,
|
|
UINT32 *Value,
|
|
ACPI_GENERIC_ADDRESS *Reg)
|
|
{
|
|
UINT64 Address;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_NAME (HwLowLevelRead);
|
|
|
|
|
|
/*
|
|
* Must have a valid pointer to a GAS structure, and
|
|
* a non-zero address within. However, don't return an error
|
|
* because the PM1A/B code must not fail if B isn't present.
|
|
*/
|
|
if (!Reg)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Get a local copy of the address. Handles possible alignment issues */
|
|
|
|
ACPI_MOVE_64_TO_64 (&Address, &Reg->Address);
|
|
if (!Address)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
*Value = 0;
|
|
|
|
/*
|
|
* Two address spaces supported: Memory or IO.
|
|
* PCI_Config is not supported here because the GAS struct is insufficient
|
|
*/
|
|
switch (Reg->SpaceId)
|
|
{
|
|
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
|
|
|
|
Status = AcpiOsReadMemory (
|
|
(ACPI_PHYSICAL_ADDRESS) Address, Value, Width);
|
|
break;
|
|
|
|
|
|
case ACPI_ADR_SPACE_SYSTEM_IO:
|
|
|
|
Status = AcpiOsReadPort ((ACPI_IO_ADDRESS) Address, Value, Width);
|
|
break;
|
|
|
|
|
|
default:
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unsupported address space: %X", Reg->SpaceId));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
|
|
"Read: %8.8X width %2d from %8.8X%8.8X (%s)\n",
|
|
*Value, Width, ACPI_FORMAT_UINT64 (Address),
|
|
AcpiUtGetRegionName (Reg->SpaceId)));
|
|
|
|
return (Status);
|
|
}
|
|
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiHwLowLevelWrite
|
|
*
|
|
* PARAMETERS: Width - 8, 16, or 32
|
|
* Value - To be written
|
|
* Reg - GAS register structure
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Write to either memory or IO space.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiHwLowLevelWrite (
|
|
UINT32 Width,
|
|
UINT32 Value,
|
|
ACPI_GENERIC_ADDRESS *Reg)
|
|
{
|
|
UINT64 Address;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_NAME (HwLowLevelWrite);
|
|
|
|
|
|
/*
|
|
* Must have a valid pointer to a GAS structure, and
|
|
* a non-zero address within. However, don't return an error
|
|
* because the PM1A/B code must not fail if B isn't present.
|
|
*/
|
|
if (!Reg)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
/* Get a local copy of the address. Handles possible alignment issues */
|
|
|
|
ACPI_MOVE_64_TO_64 (&Address, &Reg->Address);
|
|
if (!Address)
|
|
{
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Two address spaces supported: Memory or IO.
|
|
* PCI_Config is not supported here because the GAS struct is insufficient
|
|
*/
|
|
switch (Reg->SpaceId)
|
|
{
|
|
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
|
|
|
|
Status = AcpiOsWriteMemory (
|
|
(ACPI_PHYSICAL_ADDRESS) Address, Value, Width);
|
|
break;
|
|
|
|
|
|
case ACPI_ADR_SPACE_SYSTEM_IO:
|
|
|
|
Status = AcpiOsWritePort (
|
|
(ACPI_IO_ADDRESS) Address, Value, Width);
|
|
break;
|
|
|
|
|
|
default:
|
|
ACPI_ERROR ((AE_INFO,
|
|
"Unsupported address space: %X", Reg->SpaceId));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_IO,
|
|
"Wrote: %8.8X width %2d to %8.8X%8.8X (%s)\n",
|
|
Value, Width, ACPI_FORMAT_UINT64 (Address),
|
|
AcpiUtGetRegionName (Reg->SpaceId)));
|
|
|
|
return (Status);
|
|
}
|