evevent.c File Reference

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

Include dependency graph for evevent.c:

Go to the source code of this file.

Macros
#define	_COMPONENT   ACPI_EVENTS

Functions
static ACPI_STATUS	AcpiEvFixedEventInitialize (void)
static UINT32	AcpiEvFixedEventDispatch (UINT32 Event)
ACPI_STATUS	AcpiEvInitializeEvents (void)
ACPI_STATUS	AcpiEvInstallXruptHandlers (void)
UINT32	AcpiEvFixedEventDetect (void)

Macro Definition Documentation

_COMPONENT

#define _COMPONENT   ACPI_EVENTS

Definition at line 48 of file evevent.c.

Function Documentation

AcpiEvFixedEventDetect()

UINT32 AcpiEvFixedEventDetect

(

void

)

Definition at line 232 of file evevent.c.

{
    UINT32                  IntStatus = ACPI_INTERRUPT_NOT_HANDLED;
    UINT32                  FixedStatus;
    UINT32                  FixedEnable;
    UINT32                  i;
    ACPI_STATUS             Status;


    ACPI_FUNCTION_NAME (EvFixedEventDetect);


    /*
     * Read the fixed feature status and enable registers, as all the cases
     * depend on their values. Ignore errors here.
     */
    Status = AcpiHwRegisterRead (ACPI_REGISTER_PM1_STATUS, &FixedStatus);
    Status |= AcpiHwRegisterRead (ACPI_REGISTER_PM1_ENABLE, &FixedEnable);
    if (ACPI_FAILURE (Status))
    {
        return (IntStatus);
    }

    ACPI_DEBUG_PRINT ((ACPI_DB_INTERRUPTS,
        "Fixed Event Block: Enable %08X Status %08X\n",
        FixedEnable, FixedStatus));

    /*
     * Check for all possible Fixed Events and dispatch those that are active
     */
    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
    {
        /* Both the status and enable bits must be on for this event */

        if ((FixedStatus & AcpiGbl_FixedEventInfo[i].StatusBitMask) &&
            (FixedEnable & AcpiGbl_FixedEventInfo[i].EnableBitMask))
        {
            /*
             * Found an active (signalled) event. Invoke global event
             * handler if present.
             */
            AcpiFixedEventCount[i]++;
            if (AcpiGbl_GlobalEventHandler)
            {
                AcpiGbl_GlobalEventHandler (ACPI_EVENT_TYPE_FIXED, NULL,
                     i, AcpiGbl_GlobalEventHandlerContext);
            }

            IntStatus |= AcpiEvFixedEventDispatch (i);
        }
    }

    return (IntStatus);
}

Referenced by AcpiEvSciXruptHandler().

AcpiEvFixedEventDispatch()

static UINT32 AcpiEvFixedEventDispatch ( UINT32  Event )

static

Definition at line 305 of file evevent.c.

{

    ACPI_FUNCTION_ENTRY ();


    /* Clear the status bit */

    (void) AcpiWriteBitRegister (
        AcpiGbl_FixedEventInfo[Event].StatusRegisterId,
        ACPI_CLEAR_STATUS);

    /*
     * Make sure that a handler exists. If not, report an error
     * and disable the event to prevent further interrupts.
     */
    if (!AcpiGbl_FixedEventHandlers[Event].Handler)
    {
        (void) AcpiWriteBitRegister (
            AcpiGbl_FixedEventInfo[Event].EnableRegisterId,
            ACPI_DISABLE_EVENT);

        ACPI_ERROR ((AE_INFO,
            "No installed handler for fixed event - %s (%u), disabling",
            AcpiUtGetEventName (Event), Event));

        return (ACPI_INTERRUPT_NOT_HANDLED);
    }

    /* Invoke the Fixed Event handler */

    return ((AcpiGbl_FixedEventHandlers[Event].Handler)(
        AcpiGbl_FixedEventHandlers[Event].Context));
}

Referenced by AcpiEvFixedEventDetect().

AcpiEvFixedEventInitialize()

static ACPI_STATUS AcpiEvFixedEventInitialize ( void  )

static

Definition at line 185 of file evevent.c.

{
    UINT32                  i;
    ACPI_STATUS             Status;


    /*
     * Initialize the structure that keeps track of fixed event handlers and
     * enable the fixed events.
     */
    for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++)
    {
        AcpiGbl_FixedEventHandlers[i].Handler = NULL;
        AcpiGbl_FixedEventHandlers[i].Context = NULL;

        /* Disable the fixed event */

        if (AcpiGbl_FixedEventInfo[i].EnableRegisterId != 0xFF)
        {
            Status = AcpiWriteBitRegister (
                AcpiGbl_FixedEventInfo[i].EnableRegisterId,
                ACPI_DISABLE_EVENT);
            if (ACPI_FAILURE (Status))
            {
                return (Status);
            }
        }
    }

    return (AE_OK);
}

Referenced by AcpiEvInitializeEvents().

AcpiEvInitializeEvents()

ACPI_STATUS AcpiEvInitializeEvents

(

void

)

Definition at line 77 of file evevent.c.

{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (EvInitializeEvents);


    /* If Hardware Reduced flag is set, there are no fixed events */

    if (AcpiGbl_ReducedHardware)
    {
        return_ACPI_STATUS (AE_OK);
    }

    /*
     * Initialize the Fixed and General Purpose Events. This is done prior to
     * enabling SCIs to prevent interrupts from occurring before the handlers
     * are installed.
     */
    Status = AcpiEvFixedEventInitialize ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "Unable to initialize fixed events"));
        return_ACPI_STATUS (Status);
    }

    Status = AcpiEvGpeInitialize ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "Unable to initialize general purpose events"));
        return_ACPI_STATUS (Status);
    }

    return_ACPI_STATUS (Status);
}

Referenced by AcpiEnableSubsystem().

AcpiEvInstallXruptHandlers()

ACPI_STATUS AcpiEvInstallXruptHandlers

(

void

)

Definition at line 131 of file evevent.c.

{
    ACPI_STATUS             Status;


    ACPI_FUNCTION_TRACE (EvInstallXruptHandlers);


    /* If Hardware Reduced flag is set, there is no ACPI h/w */

    if (AcpiGbl_ReducedHardware)
    {
        return_ACPI_STATUS (AE_OK);
    }

    /* Install the SCI handler */

    Status = AcpiEvInstallSciHandler ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "Unable to install System Control Interrupt handler"));
        return_ACPI_STATUS (Status);
    }

    /* Install the handler for the Global Lock */

    Status = AcpiEvInitGlobalLockHandler ();
    if (ACPI_FAILURE (Status))
    {
        ACPI_EXCEPTION ((AE_INFO, Status,
            "Unable to initialize Global Lock handler"));
        return_ACPI_STATUS (Status);
    }

    AcpiGbl_EventsInitialized = TRUE;
    return_ACPI_STATUS (Status);
}

Referenced by AcpiEnableSubsystem().