Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <[email protected]>
---
 ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.c 
b/ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.c
index 384a31a..bcddf1e 100644
--- a/ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.c
+++ b/ArmPkg/Library/ArmArchTimerLib/ArmArchTimerLib.c
@@ -93,13 +93,19 @@ MicroSecondDelay (
   UINT64 TimerTicks64;
   UINT64 SystemCounterVal;
 
   // Calculate counter ticks that can represent requested delay:
   //  = MicroSeconds x TICKS_PER_MICRO_SEC
   //  = MicroSeconds x Frequency.10^-6
-  TimerTicks64 = ((UINT64)MicroSeconds * PcdGet32 (PcdArmArchTimerFreqInHz)) / 
1000000U;
+  TimerTicks64 = DivU64x32 (
+                   MultU64x32 (
+                     MicroSeconds,
+                     PcdGet32 (PcdArmArchTimerFreqInHz)
+                     ),
+                   1000000U
+                   );
 
   // Read System Counter value
   SystemCounterVal = ArmGenericTimerGetSystemCount ();
 
   TimerTicks64 += SystemCounterVal;
 
-- 
1.8.3.1



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