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ArmPlatformPkg/SP804Timer: Fix IRQ handler when the Timer IRQ is shared 

The handler must check if the raised interrupt belongs to the SP804
Timer controller.




git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11473 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
oliviermartin 2011-03-31 11:35:10 +00:00
parent 1e6a5cfcec
commit e100fa8c1e
1 changed files with 9 additions and 7 deletions
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16
ArmPlatformPkg/Drivers/SP804TimerDxe/SP804Timer.c
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@ -74,15 +74,17 @@ TimerInterruptHandler (
//
OriginalTPL = gBS->RaiseTPL (TPL_HIGH_LEVEL);
// clear the periodic interrupt
// If the interrupt is shared then we must check if this interrupt source is the one associated to this Timer
if (MmioRead32 (SP804_TIMER0_BASE + SP804_TIMER_MSK_INT_STS_REG) != 0) {
// clear the periodic interrupt
MmioWrite32 (SP804_TIMER0_BASE + SP804_TIMER_INT_CLR_REG, 0);
MmioWrite32 (SP804_TIMER0_BASE + SP804_TIMER_INT_CLR_REG, 0);
// signal end of interrupt early to help avoid losing subsequent ticks from long duration handlers
gInterrupt->EndOfInterrupt (gInterrupt, Source);
// signal end of interrupt early to help avoid losing subsequent ticks from long duration handlers
gInterrupt->EndOfInterrupt (gInterrupt, Source);
if (mTimerNotifyFunction) {
mTimerNotifyFunction (mTimerPeriod);
if (mTimerNotifyFunction) {
mTimerNotifyFunction (mTimerPeriod);
}
}
gBS->RestoreTPL (OriginalTPL);