Hi,
On 2015/08/10 19:34, Kengo NAKAHARA wrote:
> I am testing NetBSD on Cortex-A9 development board. I found delay()
> shorten rarely.
>
> I found below patch fix this issue.
> ====================
> diff --git a/sys/arch/arm/arm32/cortex_pmc.c b/sys/arch/arm/arm32/cortex_pmc.c
> index 277c272..16c9cc6 100644
> --- a/sys/arch/arm/arm32/cortex_pmc.c
> +++ b/sys/arch/arm/arm32/cortex_pmc.c
> @@ -103,7 +103,7 @@ delay(u_int arg)
> if (ctrl & CORTEX_CNTOFL_C) {
> /* Reset overflow flag for cycle counter in overflow register */
> armreg_pmovsr_write(CORTEX_CNTOFL_C);
> - delta += (last + (counts_per_wrap - cur));
> + delta += (cur + (counts_per_wrap - last));
> } else {
> delta += (cur - last);
> }
> ====================
>
> Could you comment this patch?
> If there is no objection, I will commit this patch after a few days.
I committed this patch.
Thanks,
--
//////////////////////////////////////////////////////////////////////
Internet Initiative Japan Inc.
Device Engineering Section,
Core Product Development Department,
Product Division,
Technology Unit
Kengo NAKAHARA <k-nakahara%iij.ad.jp@localhost>