diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 14:05:52 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@linux-sh.org> | 2006-09-27 14:05:52 +0900 |
| commit | fdfc74f9fcebdda14609159d5010b758a9409acf (patch) | |
| tree | 191532cb703383768cc198a41503e412578921bb | |
| parent | 36efc35447154317f9ffc5163a1793b5f7ff3de1 (diff) | |
sh: Support for SH-4A memory barriers.
SH-4A supports 'synco' as a barrier, sprinkle it around
the cache ops as necessary..
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
| -rw-r--r-- | arch/sh/mm/cache-sh4.c | 5 | ||||
| -rw-r--r-- | include/asm-sh/system.h | 7 |
2 files changed, 12 insertions, 0 deletions
diff --git a/arch/sh/mm/cache-sh4.c b/arch/sh/mm/cache-sh4.c index 94c05d09c3f..846b63d6f5e 100644 --- a/arch/sh/mm/cache-sh4.c +++ b/arch/sh/mm/cache-sh4.c @@ -184,6 +184,7 @@ void flush_cache_sigtramp(unsigned long addr) i++, index += cpu_data->icache.way_incr) ctrl_outl(0, index); /* Clear out Valid-bit */ back_to_P1(); + wmb(); local_irq_restore(flags); } @@ -223,6 +224,8 @@ void flush_dcache_page(struct page *page) flush_cache_4096(CACHE_OC_ADDRESS_ARRAY | 0x2000, phys); flush_cache_4096(CACHE_OC_ADDRESS_ARRAY | 0x3000, phys); } + + wmb(); } static inline void flush_icache_all(void) @@ -247,6 +250,7 @@ void flush_dcache_all(void) __flush_dcache_all(); else __flush_dcache_all_ex(); + wmb(); } void flush_cache_all(void) @@ -377,5 +381,6 @@ void flush_icache_user_range(struct vm_area_struct *vma, struct page *page, unsigned long addr, int len) { flush_cache_page(vma, addr, page_to_pfn(page)); + mb(); } diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h index e89728d405d..eb4902ed920 100644 --- a/include/asm-sh/system.h +++ b/include/asm-sh/system.h @@ -84,10 +84,17 @@ static __inline__ unsigned long tas(volatile int *m) extern void __xchg_called_with_bad_pointer(void); +#ifdef CONFIG_CPU_SH4A +#define mb() __asm__ __volatile__ ("synco": : :"memory") +#define rmb() mb() +#define wmb() __asm__ __volatile__ ("synco": : :"memory") +#define read_barrier_depends() do { } while(0) +#else #define mb() __asm__ __volatile__ ("": : :"memory") #define rmb() mb() #define wmb() __asm__ __volatile__ ("": : :"memory") #define read_barrier_depends() do { } while(0) +#endif #ifdef CONFIG_SMP #define smp_mb() mb() |