Attachment 251098 Details for Bug 271826 – timebase sync hack

[patch] timebase sync hack

tbsync.diff (text/plain), 1.01 KB, created by ben on 2024-05-30 19:07:44 UTC

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Creator: ben

Created: 2024-05-30 19:07:44 UTC

Size: 1.01 KB

patch

obsolete

>diff --git a/sys/powerpc/powermac/platform_powermac.c b/sys/powerpc/powermac/platform_powermac.c
>index c63ef521ca8f..1184b49d6780 100644
>--- a/sys/powerpc/powermac/platform_powermac.c
>+++ b/sys/powerpc/powermac/platform_powermac.c
>@@ -424,9 +424,12 @@ powermac_smp_timebase_sync(platform_t plat, u_long tb, int ap)
> 	if (ap) {
> 		/* APs.  Hold off until we get a stable timebase. */
> 		critical_enter();
>+mb();
> 		while (!tb_ready)
> 			atomic_thread_fence_seq_cst();
>+mb();
> 		mttb(tb);
>+mb();
> 		atomic_add_int(&cpu_done, 1);
> 		while (cpu_done < mp_ncpus)
> 			atomic_thread_fence_seq_cst();
>@@ -438,10 +441,14 @@ powermac_smp_timebase_sync(platform_t plat, u_long tb, int ap)
> 		atomic_set_int(&cpu_done, 0);
> 		freeze_timebase(powermac_tb_dev, true);
> 		tb_ready = true;
>+mb();
> 		mttb(tb);
>+mb();
> 		atomic_add_int(&cpu_done, 1);
>+mb();
> 		while (cpu_done < mp_ncpus)
> 			atomic_thread_fence_seq_cst();
>+mb();
> 		freeze_timebase(powermac_tb_dev, false);
> 		/* Reset tb_ready so we can resync at runtime */
> 		tb_ready = false;

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Attachments on bug 271826: 242607 | 242608 | 242609 | 242610 | 242611 | 251098 | 251202 | 251226