diff options
| -rw-r--r-- | PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c index 0ed874357b..c62c3a9b2b 100644 --- a/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c +++ b/PcAtChipsetPkg/HpetTimerDxe/HpetTimer.c @@ -492,11 +492,17 @@ TimerDriverSetTimerPeriod ( IN UINT64 TimerPeriod
)
{
+ EFI_TPL Tpl;
UINT64 MainCounter;
UINT64 Delta;
UINT64 CurrentComparator;
HPET_TIMER_MSI_ROUTE_REGISTER HpetTimerMsiRoute;
-
+
+ //
+ // Disable interrupts
+ //
+ Tpl = gBS->RaiseTPL (TPL_HIGH_LEVEL);
+
//
// Disable HPET timer when adjusting the timer period
//
@@ -616,7 +622,12 @@ TimerDriverSetTimerPeriod ( // is disabled.
//
HpetEnable (TRUE);
-
+
+ //
+ // Restore interrupts
+ //
+ gBS->RestoreTPL (Tpl);
+
return EFI_SUCCESS;
}
|