hwesleep.c File Reference

#include "acpi.h"
#include "accommon.h"

Include dependency graph for hwesleep.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_HARDWARE

Functions
void	AcpiHwExecuteSleepMethod (char *MethodPathname, UINT32 IntegerArgument)
ACPI_STATUS	AcpiHwExtendedSleep (UINT8 SleepState)
ACPI_STATUS	AcpiHwExtendedWakePrep (UINT8 SleepState)
ACPI_STATUS	AcpiHwExtendedWake (UINT8 SleepState)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_HARDWARE

Definition at line 48 of file hwesleep.c.

Function Documentation

AcpiHwExecuteSleepMethod()

void AcpiHwExecuteSleepMethod	(	char *	MethodPathname,
		UINT32	IntegerArgument
	)

Definition at line 67 of file hwesleep.c.

{
    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, MethodPathname, &ArgList, NULL);
    if (ACPI_FAILURE (Status) && Status != AE_NOT_FOUND)
    {
        ACPI_EXCEPTION ((AE_INFO, Status, "While executing method %s",
            MethodPathname));
    }
 
    return_VOID;
}

Referenced by AcpiEnterSleepStatePrep(), AcpiHwExtendedWake(), and AcpiHwLegacyWake().

AcpiHwExtendedSleep()

ACPI_STATUS AcpiHwExtendedSleep

(

UINT8

SleepState

)

Definition at line 112 of file hwesleep.c.

{
    ACPI_STATUS             Status;
    UINT8                   SleepControl;
    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 ((UINT64) ACPI_X_WAKE_STATUS,
        &AcpiGbl_FADT.SleepStatus);
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    AcpiGbl_SystemAwakeAndRunning = FALSE;
 
    /*
     * 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));
 
    SleepControl = ((AcpiGbl_SleepTypeA << ACPI_X_SLEEP_TYPE_POSITION) &
        ACPI_X_SLEEP_TYPE_MASK) | ACPI_X_SLEEP_ENABLE;
 
    /* Flush caches, as per ACPI specification */
 
    if (SleepState < ACPI_STATE_S4)
    {
        ACPI_FLUSH_CPU_CACHE ();
    }
 
    Status = AcpiOsEnterSleep (SleepState, SleepControl, 0);
    if (Status == AE_CTRL_TERMINATE)
    {
        return_ACPI_STATUS (AE_OK);
    }
    if (ACPI_FAILURE (Status))
    {
        return_ACPI_STATUS (Status);
    }
 
    Status = AcpiWrite ((UINT64) SleepControl, &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);
}

AcpiHwExtendedWake()

ACPI_STATUS AcpiHwExtendedWake

(

UINT8

SleepState

)

Definition at line 243 of file hwesleep.c.

{
    ACPI_FUNCTION_TRACE (HwExtendedWake);
 
 
    /* Ensure EnterSleepStatePrep -> EnterSleepState ordering */
 
    AcpiGbl_SleepTypeA = ACPI_SLEEP_TYPE_INVALID;
 
    /* Execute the wake methods */
 
    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WAKING);
    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__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 ((UINT64) ACPI_X_WAKE_STATUS, &AcpiGbl_FADT.SleepStatus);
    AcpiGbl_SystemAwakeAndRunning = TRUE;
 
    AcpiHwExecuteSleepMethod (METHOD_PATHNAME__SST, ACPI_SST_WORKING);
    return_ACPI_STATUS (AE_OK);
}

AcpiHwExtendedWakePrep()

ACPI_STATUS AcpiHwExtendedWakePrep

(

UINT8

SleepState

)

Definition at line 207 of file hwesleep.c.

{
    UINT8                   SleepTypeValue;
 
 
    ACPI_FUNCTION_TRACE (HwExtendedWakePrep);
 
 
    if (AcpiGbl_SleepTypeAS0 != ACPI_SLEEP_TYPE_INVALID)
    {
        SleepTypeValue = ((AcpiGbl_SleepTypeAS0 << ACPI_X_SLEEP_TYPE_POSITION) &
            ACPI_X_SLEEP_TYPE_MASK);
 
        (void) AcpiWrite ((UINT64) (SleepTypeValue | ACPI_X_SLEEP_ENABLE),
            &AcpiGbl_FADT.SleepControl);
    }
 
    return_ACPI_STATUS (AE_OK);
}