108 lines
3.1 KiB
C
108 lines
3.1 KiB
C
/*-
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* Copyright (c) 2001 Mitsuru IWASAKI
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "acpi.h"
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#include <machine/cpufunc.h>
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#include <dev/acpica/acpica_support.h>
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ACPI_MODULE_NAME("SUPPORT")
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/*
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* Implement support code temporary here until officially merged into
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* Intel ACPI CA release.
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*/
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#undef _COMPONENT
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#define _COMPONENT ACPI_HARDWARE
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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: Enter a system sleep state S4BIOS
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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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ACPI_OBJECT_LIST ArgList;
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ACPI_OBJECT Arg;
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UINT32 Value;
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ACPI_FUNCTION_TRACE ("AcpiEnterSleepStateS4Bios");
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/* run the _PTS and _GTS methods */
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ACPI_MEMSET(&ArgList, 0, sizeof(ArgList));
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ArgList.Count = 1;
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ArgList.Pointer = &Arg;
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ACPI_MEMSET(&Arg, 0, sizeof(Arg));
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Arg.Type = ACPI_TYPE_INTEGER;
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Arg.Integer.Value = ACPI_STATE_S4;
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AcpiEvaluateObject (NULL, "\\_PTS", &ArgList, NULL);
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AcpiEvaluateObject (NULL, "\\_GTS", &ArgList, NULL);
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/* clear wake status */
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AcpiSetRegister (ACPI_BITREG_WAKE_STATUS, 1, ACPI_MTX_LOCK);
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ACPI_DISABLE_IRQS ();
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AcpiHwDisableNonWakeupGpes();
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/* flush caches */
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ACPI_FLUSH_CPU_CACHE ();
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/* write the value to command port and wait until we enter sleep state */
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do
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{
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AcpiOsStall(1000000);
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AcpiOsWritePort (AcpiGbl_FADT->SmiCmd, AcpiGbl_FADT->S4BiosReq, 8);
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AcpiGetRegister (ACPI_BITREG_WAKE_STATUS, &Value, ACPI_MTX_LOCK);
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}
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while (!Value);
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AcpiHwEnableNonWakeupGpes();
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ACPI_ENABLE_IRQS ();
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return_ACPI_STATUS (AE_OK);
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}
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