diff options
| -rw-r--r-- | arch/mips/Kconfig | 1 | ||||
| -rw-r--r-- | arch/mips/include/asm/barrier.h | 43 |
2 files changed, 31 insertions, 13 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index 8b5d174685f..70376e58631 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1295,7 +1295,6 @@ config CPU_CAVIUM_OCTEON select SYS_SUPPORTS_SMP select NR_CPUS_DEFAULT_16 select WEAK_ORDERING - select WEAK_REORDERING_BEYOND_LLSC select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES help diff --git a/arch/mips/include/asm/barrier.h b/arch/mips/include/asm/barrier.h index 1a5a51c3e96..a2670a239e0 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 @@ -131,9 +140,15 @@ #endif /* !CONFIG_CPU_HAS_WB */ #if defined(CONFIG_WEAK_ORDERING) && defined(CONFIG_SMP) -#define smp_mb() __asm__ __volatile__("sync" : : :"memory") -#define smp_rmb() __asm__ __volatile__("sync" : : :"memory") -#define smp_wmb() __asm__ __volatile__("sync" : : :"memory") +# 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 smp_mb() barrier() #define smp_rmb() barrier() @@ -151,6 +166,10 @@ #define smp_llsc_mb() __asm__ __volatile__(__WEAK_LLSC_MB : : :"memory") +#ifdef CONFIG_CPU_CAVIUM_OCTEON +#define smp_mb__before_llsc() smp_wmb() +#else #define smp_mb__before_llsc() smp_llsc_mb() +#endif #endif /* __ASM_BARRIER_H */ |