From: Leif Lindholm <leif.lindholm@linaro.org>
Date: Thu, 30 Nov 2017 13:55:59 +0000 (+0000)
Subject: Omap35xxPkg: add GetTimeInNanoSecond implementation
X-Git-Tag: edk2-stable201903~2965
X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=commitdiff_plain;h=7d976f279e49bc4897715e3c9c23781812341d51;hp=ef1b70ff08ed956da52691f277635b3c2dc124a2

Omap35xxPkg: add GetTimeInNanoSecond implementation

Commit a63be426f8e3 ("ArmPlatformPkg: Store initial timer value") caused
BeagleBoard to stop building, due to Omap35xxTimerLib lacking an
implementation of GetTimeInNanoSecond (). So add one.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---

diff --git a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
index 652c47b6f6..a6f79ddd57 100644
--- a/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
+++ b/Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c
@@ -131,3 +131,27 @@ GetPerformanceCounterProperties (
 
   return PcdGet64(PcdEmbeddedPerformanceCounterFrequencyInHz);
 }
+
+/**
+  Converts elapsed ticks of performance counter to time in nanoseconds.
+
+  This function converts the elapsed ticks of running performance counter to
+  time value in unit of nanoseconds.
+
+  @param  Ticks     The number of elapsed ticks of running performance counter.
+
+  @return The elapsed time in nanoseconds.
+
+**/
+UINT64
+EFIAPI
+GetTimeInNanoSecond (
+  IN      UINT64                     Ticks
+  )
+{
+  UINT32 Period;
+
+  Period = PcdGet32 (PcdEmbeddedPerformanceCounterPeriodInNanoseconds);
+
+  return (Ticks * Period);
+}