/**
Called by the platform code to process a tick.
@param Duration The number of 100ns elasped since the last call
to TimerTick
**/
VOID
EFIAPI
CoreTimerTick (
IN UINT64 Duration
)
{
IEVENT *Event;
//
// Check runtiem flag in case there are ticks while exiting boot services
//
CoreAcquireLock (&mEfiSystemTimeLock);
//
// Update the system time
//
mEfiSystemTime += Duration;
//
// If the head of the list is expired, fire the timer event
// to process it
//
if (!IsListEmpty (&mEfiTimerList)) {
Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
if (Event->Timer.TriggerTime <= mEfiSystemTime) {
CoreSignalEvent (mEfiCheckTimerEvent);
}
}
CoreReleaseLock (&mEfiSystemTimeLock);
}
VOID
CoreNotifyProtocolEntry (
IN PROTOCOL_ENTRY *ProtEntry
)
/*++
Routine Description:
Signal event for every protocol in protocol entry.
Arguments:
ProtEntry - Protocol entry
Returns:
--*/
{
PROTOCOL_NOTIFY *ProtNotify;
EFI_LIST_ENTRY *Link;
ASSERT_LOCKED (&gProtocolDatabaseLock);
for (Link=ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link=Link->ForwardLink) {
ProtNotify = CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);
CoreSignalEvent (ProtNotify->Event);
}
}
/**
Sets the type of timer and the trigger time for a timer event.
@param UserEvent The timer event that is to be signaled at the
specified time
@param Type The type of time that is specified in
TriggerTime
@param TriggerTime The number of 100ns units until the timer
expires
@retval EFI_SUCCESS The event has been set to be signaled at the
requested time
@retval EFI_INVALID_PARAMETER Event or Type is not valid
**/
EFI_STATUS
EFIAPI
CoreSetTimer (
IN EFI_EVENT UserEvent,
IN EFI_TIMER_DELAY Type,
IN UINT64 TriggerTime
)
{
IEVENT *Event;
Event = UserEvent;
if (Event == NULL) {
return EFI_INVALID_PARAMETER;
}
if (Event->Signature != EVENT_SIGNATURE) {
return EFI_INVALID_PARAMETER;
}
if ((UINT32)Type > TimerRelative || (Event->Type & EVT_TIMER) == 0) {
return EFI_INVALID_PARAMETER;
}
CoreAcquireLock (&mEfiTimerLock);
//
// If the timer is queued to the timer database, remove it
//
if (Event->Timer.Link.ForwardLink != NULL) {
RemoveEntryList (&Event->Timer.Link);
Event->Timer.Link.ForwardLink = NULL;
}
Event->Timer.TriggerTime = 0;
Event->Timer.Period = 0;
if (Type != TimerCancel) {
if (Type == TimerPeriodic) {
if (TriggerTime == 0) {
gTimer->GetTimerPeriod (gTimer, &TriggerTime);
}
Event->Timer.Period = TriggerTime;
}
Event->Timer.TriggerTime = CoreCurrentSystemTime () + TriggerTime;
CoreInsertEventTimer (Event);
if (TriggerTime == 0) {
CoreSignalEvent (mEfiCheckTimerEvent);
}
}
CoreReleaseLock (&mEfiTimerLock);
return EFI_SUCCESS;
}
/**
Signal event for every protocol in protocol entry.
@param ProtEntry Protocol entry
**/
VOID
CoreNotifyProtocolEntry (
IN PROTOCOL_ENTRY *ProtEntry
)
{
PROTOCOL_NOTIFY *ProtNotify;
LIST_ENTRY *Link;
ASSERT_LOCKED (&gProtocolDatabaseLock);
for (Link=ProtEntry->Notify.ForwardLink; Link != &ProtEntry->Notify; Link=Link->ForwardLink) {
ProtNotify = CR(Link, PROTOCOL_NOTIFY, Link, PROTOCOL_NOTIFY_SIGNATURE);
CoreSignalEvent (ProtNotify->Event);
}
}
/**
Stops execution until an event is signaled.
@param NumberOfEvents The number of events in the UserEvents array
@param UserEvents An array of EFI_EVENT
@param UserIndex Pointer to the index of the event which
satisfied the wait condition
@retval EFI_SUCCESS The event indicated by Index was signaled.
@retval EFI_INVALID_PARAMETER The event indicated by Index has a notification
function or Event was not a valid type
@retval EFI_UNSUPPORTED The current TPL is not TPL_APPLICATION
**/
EFI_STATUS
EFIAPI
CoreWaitForEvent (
IN UINTN NumberOfEvents,
IN EFI_EVENT *UserEvents,
OUT UINTN *UserIndex
)
{
EFI_STATUS Status;
UINTN Index;
//
// Can only WaitForEvent at TPL_APPLICATION
//
if (gEfiCurrentTpl != TPL_APPLICATION) {
return EFI_UNSUPPORTED;
}
for(;;) {
for(Index = 0; Index < NumberOfEvents; Index++) {
Status = CoreCheckEvent (UserEvents[Index]);
//
// provide index of event that caused problem
//
if (Status != EFI_NOT_READY) {
*UserIndex = Index;
return Status;
}
}
//
// Signal the Idle event
//
CoreSignalEvent (gIdleLoopEvent);
}
}
/**
Checks the sorted timer list against the current system time.
Signals any expired event timer.
@param CheckEvent Not used
@param Context Not used
**/
VOID
EFIAPI
CoreCheckTimers (
IN EFI_EVENT CheckEvent,
IN VOID *Context
)
{
UINT64 SystemTime;
IEVENT *Event;
//
// Check the timer database for expired timers
//
CoreAcquireLock (&mEfiTimerLock);
SystemTime = CoreCurrentSystemTime ();
while (!IsListEmpty (&mEfiTimerList)) {
Event = CR (mEfiTimerList.ForwardLink, IEVENT, Timer.Link, EVENT_SIGNATURE);
//
// If this timer is not expired, then we're done
//
if (Event->Timer.TriggerTime > SystemTime) {
break;
}
//
// Remove this timer from the timer queue
//
RemoveEntryList (&Event->Timer.Link);
Event->Timer.Link.ForwardLink = NULL;
//
// Signal it
//
CoreSignalEvent (Event);
//
// If this is a periodic timer, set it
//
if (Event->Timer.Period != 0) {
//
// Compute the timers new trigger time
//
Event->Timer.TriggerTime = Event->Timer.TriggerTime + Event->Timer.Period;
//
// If that's before now, then reset the timer to start from now
//
if (Event->Timer.TriggerTime <= SystemTime) {
Event->Timer.TriggerTime = SystemTime;
CoreSignalEvent (mEfiCheckTimerEvent);
}
//
// Add the timer
//
CoreInsertEventTimer (Event);
}
}
CoreReleaseLock (&mEfiTimerLock);
}
