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author | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
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committer | jkim <jkim@FreeBSD.org> | 2012-02-16 22:59:29 +0000 |
commit | a561c762bacb78b14d2bf5fb20afc1566203f990 (patch) | |
tree | d4ae2db1980d2ec7b164b1a5658fd2ae62569456 /sys/contrib/dev/acpica/components/hardware/hwesleep.c | |
parent | 2b86faa18cb89921d202e133fa6a1c39b63cfe16 (diff) | |
parent | a6dfe3119152f97e640cc135d963b9f7c95c84ef (diff) | |
download | FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.zip FreeBSD-src-a561c762bacb78b14d2bf5fb20afc1566203f990.tar.gz |
Merge ACPICA 20120215.
Diffstat (limited to 'sys/contrib/dev/acpica/components/hardware/hwesleep.c')
-rw-r--r-- | sys/contrib/dev/acpica/components/hardware/hwesleep.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/sys/contrib/dev/acpica/components/hardware/hwesleep.c b/sys/contrib/dev/acpica/components/hardware/hwesleep.c new file mode 100644 index 0000000..8133e85 --- /dev/null +++ b/sys/contrib/dev/acpica/components/hardware/hwesleep.c @@ -0,0 +1,263 @@ +/****************************************************************************** + * + * Name: hwesleep.c - ACPI Hardware Sleep/Wake Support functions for the + * extended FADT-V5 sleep registers. + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2012, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include <contrib/dev/acpica/include/acpi.h> +#include <contrib/dev/acpica/include/accommon.h> + +#define _COMPONENT ACPI_HARDWARE + ACPI_MODULE_NAME ("hwesleep") + + +/******************************************************************************* + * + * FUNCTION: AcpiHwExecuteSleepMethod + * + * PARAMETERS: MethodName - Pathname of method to execute + * IntegerArgument - Argument to pass to the method + * + * RETURN: None + * + * DESCRIPTION: Execute a sleep/wake related method with one integer argument + * and no return value. + * + ******************************************************************************/ + +void +AcpiHwExecuteSleepMethod ( + char *MethodName, + UINT32 IntegerArgument) +{ + ACPI_OBJECT_LIST ArgList; + ACPI_OBJECT Arg; + ACPI_STATUS Status; + + + ACPI_FUNCTION_TRACE (HwExecuteSleepMethod); + + + /* One argument, IntegerArgument; No return value expected */ + + ArgList.Count = 1; + ArgList.Pointer = &Arg; + Arg.Type = ACPI_TYPE_INTEGER; + Arg.Integer.Value = (UINT64) IntegerArgument; + + Status = AcpiEvaluateObject (NULL, MethodName, &ArgList, NULL); + if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND) + { + ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s", + MethodName)); + } + + return_VOID; +} + + +/******************************************************************************* + * + * FUNCTION: AcpiHwExtendedSleep + * + * PARAMETERS: SleepState - Which sleep state to enter + * + * RETURN: Status + * + * DESCRIPTION: Enter a system sleep state via the extended FADT sleep + * registers (V5 FADT). + * THIS FUNCTION MUST BE CALLED WITH INTERRUPTS DISABLED + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwExtendedSleep ( + UINT8 SleepState) +{ + ACPI_STATUS Status; + UINT8 SleepTypeValue; + UINT64 SleepStatus; + + + ACPI_FUNCTION_TRACE (HwExtendedSleep); + + + /* Extended sleep registers must be valid */ + + if (!AcpiGbl_FADT.SleepControl.Address || + !AcpiGbl_FADT.SleepStatus.Address) + { + return_ACPI_STATUS (AE_NOT_EXIST); + } + + /* Clear wake status (WAK_STS) */ + + Status = AcpiWrite (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + AcpiGbl_SystemAwakeAndRunning = FALSE; + + /* Execute the _GTS method (Going To Sleep) */ + + AcpiHwExecuteSleepMethod (METHOD_NAME__GTS, SleepState); + + /* Flush caches, as per ACPI specification */ + + ACPI_FLUSH_CPU_CACHE (); + + /* + * Set the SLP_TYP and SLP_EN bits. + * + * Note: We only use the first value returned by the \_Sx method + * (AcpiGbl_SleepTypeA) - As per ACPI specification. + */ + ACPI_DEBUG_PRINT ((ACPI_DB_INIT, + "Entering sleep state [S%u]\n", SleepState)); + + SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) & + ACPI_X_SLEEP_TYPE_MASK); + + Status = AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE), + &AcpiGbl_FADT.SleepControl); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + /* Wait for transition back to Working State */ + + do + { + Status = AcpiRead (&SleepStatus, &AcpiGbl_FADT.SleepStatus); + if (ACPI_FAILURE (Status)) + { + return_ACPI_STATUS (Status); + } + + } while (!(((UINT8) SleepStatus) & ACPI_X_WAKE_STATUS)); + + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiHwExtendedWakePrep + * + * PARAMETERS: SleepState - Which sleep state we just exited + * + * RETURN: Status + * + * DESCRIPTION: Perform first part of OS-independent ACPI cleanup after + * a sleep. Called with interrupts ENABLED. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwExtendedWakePrep ( + UINT8 SleepState) +{ + ACPI_STATUS Status; + UINT8 SleepTypeValue; + + + ACPI_FUNCTION_TRACE (HwExtendedWakePrep); + + + Status = AcpiGetSleepTypeData (ACPI_STATE_S0, + &AcpiGbl_SleepTypeA, &AcpiGbl_SleepTypeB); + if (ACPI_SUCCESS (Status)) + { + SleepTypeValue = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) & + ACPI_X_SLEEP_TYPE_MASK); + + (void) AcpiWrite ((SleepTypeValue | ACPI_X_SLEEP_ENABLE), + &AcpiGbl_FADT.SleepControl); + } + + AcpiHwExecuteSleepMethod (METHOD_NAME__BFS, SleepState); + return_ACPI_STATUS (AE_OK); +} + + +/******************************************************************************* + * + * FUNCTION: AcpiHwExtendedWake + * + * PARAMETERS: SleepState - Which sleep state we just exited + * + * RETURN: Status + * + * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep + * Called with interrupts ENABLED. + * + ******************************************************************************/ + +ACPI_STATUS +AcpiHwExtendedWake ( + UINT8 SleepState) +{ + ACPI_FUNCTION_TRACE (HwExtendedWake); + + + /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */ + + AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID; + + /* Execute the wake methods */ + + AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WAKING); + AcpiHwExecuteSleepMethod (METHOD_NAME__WAK, SleepState); + + /* + * Some BIOS code assumes that WAK_STS will be cleared on resume + * and use it to determine whether the system is rebooting or + * resuming. Clear WAK_STS for compatibility. + */ + (void) AcpiWrite (ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus); + AcpiGbl_SystemAwakeAndRunning = TRUE; + + AcpiHwExecuteSleepMethod (METHOD_NAME__SST, ACPI_SST_WORKING); + return_ACPI_STATUS (AE_OK); +} |