Omap35xxPkg: add GetTimeInNanoSecond implementation

[mirror_edk2.git] / Omap35xxPkg / Library / Omap35xxTimerLib / TimerLib.c

diff --git a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
index 652c47b6f61a8b737bf9c75feb8636bae83d8918..a6f79ddd57f62ab07bf7f6059498bf2ab9355b9c 100644 (file)
--- a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
+++ b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
@@ -131,3 +131,27 @@ GetPerformanceCounterProperties (
 \r
   return PcdGet64(PcdEmbeddedPerformanceCounterFrequencyInHz);\r
 }\r
+\r
+/**\r
+  Converts elapsed ticks of performance counter to time in nanoseconds.\r
+\r
+  This function converts the elapsed ticks of running performance counter to\r
+  time value in unit of nanoseconds.\r
+\r
+  @param  Ticks     The number of elapsed ticks of running performance counter.\r
+\r
+  @return The elapsed time in nanoseconds.\r
+\r
+**/\r
+UINT64\r
+EFIAPI\r
+GetTimeInNanoSecond (\r
+  IN      UINT64                     Ticks\r
+  )\r
+{\r
+  UINT32 Period;\r
+\r
+  Period = PcdGet32 (PcdEmbeddedPerformanceCounterPeriodInNanoseconds);\r
+\r
+  return (Ticks * Period);\r
+}\r