Re: [PATCH v2] Omap35xxPkg: add GetTimeInNanoSecond implementation

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 30 November 2017 at 14:22, Leif Lindholm <leif.lindholm@linaro.org> wrote:
> 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
>

Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>