From: Leif Lindholm <leif.lindholm@linaro.org>
To: edk2-devel@lists.01.org
Cc: ard.biesheuvel@linaro.org
Subject: [PATCH v2] Omap35xxPkg: add GetTimeInNanoSecond implementation
Date: Thu, 30 Nov 2017 14:22:57 +0000 [thread overview]
Message-ID: <20171130142257.28140-1-leif.lindholm@linaro.org> (raw)
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>
---
Omap35xxPkg/Library/Omap35xxTimerLib/TimerLib.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
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);
+}
--
2.11.0
next reply other threads:[~2017-11-30 14:18 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-30 14:22 Leif Lindholm [this message]
2017-11-30 14:24 ` [PATCH v2] Omap35xxPkg: add GetTimeInNanoSecond implementation Ard Biesheuvel
2017-11-30 14:34 ` Leif Lindholm
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