diff options
| author | Rich Felker <dalias@libc.org> | 2016-07-28 19:21:10 +0000 |
|---|---|---|
| committer | Rich Felker <dalias@libc.org> | 2016-08-05 03:29:34 +0000 |
| commit | 2b47d54ed41c33baf5825185168b493317c5572f (patch) | |
| tree | a42a2098fa73f41d6d5b214e1eeca5712d419551 /arch/sh/include/asm/barrier.h | |
| parent | 834da197058bebcb343320dafb8b62d416d4038c (diff) | |
sh: add J2 atomics using the cas.l instruction
Signed-off-by: Rich Felker <dalias@libc.org>
Diffstat (limited to 'arch/sh/include/asm/barrier.h')
| -rw-r--r-- | arch/sh/include/asm/barrier.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/sh/include/asm/barrier.h b/arch/sh/include/asm/barrier.h index 8a84e05adb2e..3c30b6e166b6 100644 --- a/arch/sh/include/asm/barrier.h +++ b/arch/sh/include/asm/barrier.h @@ -29,6 +29,11 @@ #define wmb() mb() #define ctrl_barrier() __icbi(PAGE_OFFSET) #else +#if defined(CONFIG_CPU_J2) && defined(CONFIG_SMP) +#define __smp_mb() do { int tmp = 0; __asm__ __volatile__ ("cas.l %0,%0,@%1" : "+r"(tmp) : "z"(&tmp) : "memory", "t"); } while(0) +#define __smp_rmb() __smp_mb() +#define __smp_wmb() __smp_mb() +#endif #define ctrl_barrier() __asm__ __volatile__ ("nop;nop;nop;nop;nop;nop;nop;nop") #endif |