From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- tools/virtio/asm/barrier.h | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 tools/virtio/asm/barrier.h (limited to 'tools/virtio/asm') diff --git a/tools/virtio/asm/barrier.h b/tools/virtio/asm/barrier.h new file mode 100644 index 000000000..aff61e133 --- /dev/null +++ b/tools/virtio/asm/barrier.h @@ -0,0 +1,14 @@ +#if defined(__i386__) || defined(__x86_64__) +#define barrier() asm volatile("" ::: "memory") +#define mb() __sync_synchronize() + +#define smp_mb() mb() +# define smp_rmb() barrier() +# define smp_wmb() barrier() +/* Weak barriers should be used. If not - it's a bug */ +# define rmb() abort() +# define wmb() abort() +#else +#error Please fill in barrier macros +#endif + -- cgit v1.2.3-54-g00ecf