diff options
Diffstat (limited to 'arch/mips/include/asm/barrier.h')
| -rw-r--r-- | arch/mips/include/asm/barrier.h | 60 |
1 files changed, 43 insertions, 17 deletions
diff --git a/arch/mips/include/asm/barrier.h b/arch/mips/include/asm/barrier.h index 8e9ac313ca3..c0884f02d3a 100644 --- a/arch/mips/include/asm/barrier.h +++ b/arch/mips/include/asm/barrier.h @@ -88,12 +88,20 @@ : /* no output */ \ : "m" (*(int *)CKSEG1) \ : "memory") - -#define fast_wmb() __sync() -#define fast_rmb() __sync() -#define fast_mb() __sync() -#ifdef CONFIG_SGI_IP28 -#define fast_iob() \ +#ifdef CONFIG_CPU_CAVIUM_OCTEON +# define OCTEON_SYNCW_STR ".set push\n.set arch=octeon\nsyncw\nsyncw\n.set pop\n" +# define __syncw() __asm__ __volatile__(OCTEON_SYNCW_STR : : : "memory") + +# define fast_wmb() __syncw() +# define fast_rmb() barrier() +# define fast_mb() __sync() +# define fast_iob() do { } while (0) +#else /* ! CONFIG_CPU_CAVIUM_OCTEON */ +# define fast_wmb() __sync() +# define fast_rmb() __sync() +# define fast_mb() __sync() +# ifdef CONFIG_SGI_IP28 +# define fast_iob() \ __asm__ __volatile__( \ ".set push\n\t" \ ".set noreorder\n\t" \ @@ -104,13 +112,14 @@ : /* no output */ \ : "m" (*(int *)CKSEG1ADDR(0x1fa00004)) \ : "memory") -#else -#define fast_iob() \ +# else +# define fast_iob() \ do { \ __sync(); \ __fast_iob(); \ } while (0) -#endif +# endif +#endif /* CONFIG_CPU_CAVIUM_OCTEON */ #ifdef CONFIG_CPU_HAS_WB @@ -131,25 +140,42 @@ #endif /* !CONFIG_CPU_HAS_WB */ #if defined(CONFIG_WEAK_ORDERING) && defined(CONFIG_SMP) -#define __WEAK_ORDERING_MB " sync \n" +# ifdef CONFIG_CPU_CAVIUM_OCTEON +# define smp_mb() __sync() +# define smp_rmb() barrier() +# define smp_wmb() __syncw() +# else +# define smp_mb() __asm__ __volatile__("sync" : : :"memory") +# define smp_rmb() __asm__ __volatile__("sync" : : :"memory") +# define smp_wmb() __asm__ __volatile__("sync" : : :"memory") +# endif #else -#define __WEAK_ORDERING_MB " \n" +#define smp_mb() barrier() +#define smp_rmb() barrier() +#define smp_wmb() barrier() #endif + #if defined(CONFIG_WEAK_REORDERING_BEYOND_LLSC) && defined(CONFIG_SMP) #define __WEAK_LLSC_MB " sync \n" #else #define __WEAK_LLSC_MB " \n" #endif -#define smp_mb() __asm__ __volatile__(__WEAK_ORDERING_MB : : :"memory") -#define smp_rmb() __asm__ __volatile__(__WEAK_ORDERING_MB : : :"memory") -#define smp_wmb() __asm__ __volatile__(__WEAK_ORDERING_MB : : :"memory") - #define set_mb(var, value) \ do { var = value; smp_mb(); } while (0) #define smp_llsc_mb() __asm__ __volatile__(__WEAK_LLSC_MB : : :"memory") -#define smp_llsc_rmb() __asm__ __volatile__(__WEAK_LLSC_MB : : :"memory") -#define smp_llsc_wmb() __asm__ __volatile__(__WEAK_LLSC_MB : : :"memory") + +#ifdef CONFIG_CPU_CAVIUM_OCTEON +#define smp_mb__before_llsc() smp_wmb() +/* Cause previous writes to become visible on all CPUs as soon as possible */ +#define nudge_writes() __asm__ __volatile__(".set push\n\t" \ + ".set arch=octeon\n\t" \ + "syncw\n\t" \ + ".set pop" : : : "memory") +#else +#define smp_mb__before_llsc() smp_llsc_mb() +#define nudge_writes() mb() +#endif #endif /* __ASM_BARRIER_H */ |