diff options
| author |   jsg <jsg@openbsd.org> | 2016-05-16 13:18:51 +0000 |
|---|---|---|
| committer | jsg <jsg@openbsd.org> | 2016-05-16 13:18:51 +0000 |
| commit | 5814f4d19e40aba733a0c3d4f2bf21ece9d8a863 (patch) | |
| tree | 084dca592987c9e6aecc3e6e63067c895602fe9f | |
| parent | fix perms (previous cleanup commit introduced part of an unrelated change) (diff) | |
| download | wireguard-openbsd-5814f4d19e40aba733a0c3d4f2bf21ece9d8a863.tar.xz wireguard-openbsd-5814f4d19e40aba733a0c3d4f2bf21ece9d8a863.zip | |
Implement membar(9) for armv5. As there are no barrier instructions in
armv5 this is just a "memory" clobber hint to the compiler.
ok kettenis@
| -rw-r--r-- | sys/arch/arm/include/atomic.h | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/sys/arch/arm/include/atomic.h b/sys/arch/arm/include/atomic.h index b50a12e9c12..27dddf96e60 100644 --- a/sys/arch/arm/include/atomic.h +++ b/sys/arch/arm/include/atomic.h @@ -1,4 +1,4 @@ -/* $OpenBSD: atomic.h,v 1.14 2016/04/25 08:00:43 patrick Exp $ */ +/* $OpenBSD: atomic.h,v 1.15 2016/05/16 13:18:51 jsg Exp $ */ /* Public Domain */ @@ -465,6 +465,19 @@ atomic_clearbits_int(volatile unsigned int *p, unsigned int v) : "memory", "cc" ); } +#endif /* CPU_ARMv7 */ + +#if !defined(CPU_ARMv7) + +#define __membar() do { __asm __volatile("" ::: "memory"); } while (0) + +#define membar_enter() __membar() +#define membar_exit() __membar() +#define membar_producer() __membar() +#define membar_consumer() __membar() +#define membar_sync() __membar() + +#else /* !CPU_ARMv7 */ #define __membar(_f) do { __asm __volatile(_f ::: "memory"); } while (0) |