diff options
Diffstat (limited to 'arch/blackfin/include/asm/cacheflush.h')
| -rw-r--r-- | arch/blackfin/include/asm/cacheflush.h | 35 |
1 files changed, 16 insertions, 19 deletions
diff --git a/arch/blackfin/include/asm/cacheflush.h b/arch/blackfin/include/asm/cacheflush.h index 1b040f5b4fe..d7726ab486f 100644 --- a/arch/blackfin/include/asm/cacheflush.h +++ b/arch/blackfin/include/asm/cacheflush.h @@ -30,7 +30,8 @@ #ifndef _BLACKFIN_CACHEFLUSH_H #define _BLACKFIN_CACHEFLUSH_H -extern void blackfin_icache_dcache_flush_range(unsigned long start_address, unsigned long end_address); +#include <asm/blackfin.h> /* for SSYNC() */ + extern void blackfin_icache_flush_range(unsigned long start_address, unsigned long end_address); extern void blackfin_dcache_flush_range(unsigned long start_address, unsigned long end_address); extern void blackfin_dcache_invalidate_range(unsigned long start_address, unsigned long end_address); @@ -54,32 +55,28 @@ extern void blackfin_invalidate_entire_dcache(void); static inline void flush_icache_range(unsigned start, unsigned end) { -#if defined(CONFIG_BFIN_DCACHE) && defined(CONFIG_BFIN_ICACHE) - -# if defined(CONFIG_BFIN_WT) - blackfin_icache_flush_range((start), (end)); - flush_icache_range_others(start, end); -# else - blackfin_icache_dcache_flush_range((start), (end)); -# endif - -#else +#if defined(CONFIG_BFIN_WB) + blackfin_dcache_flush_range(start, end); +#endif -# if defined(CONFIG_BFIN_ICACHE) - blackfin_icache_flush_range((start), (end)); + /* Make sure all write buffers in the data side of the core + * are flushed before trying to invalidate the icache. This + * needs to be after the data flush and before the icache + * flush so that the SSYNC does the right thing in preventing + * the instruction prefetcher from hitting things in cached + * memory at the wrong time -- it runs much further ahead than + * the pipeline. + */ + SSYNC(); +#if defined(CONFIG_BFIN_ICACHE) + blackfin_icache_flush_range(start, end); flush_icache_range_others(start, end); -# endif -# if defined(CONFIG_BFIN_DCACHE) - blackfin_dcache_flush_range((start), (end)); -# endif - #endif } #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ do { memcpy(dst, src, len); \ flush_icache_range((unsigned) (dst), (unsigned) (dst) + (len)); \ - flush_icache_range_others((unsigned long) (dst), (unsigned long) (dst) + (len));\ } while (0) #define copy_from_user_page(vma, page, vaddr, dst, src, len) memcpy(dst, src, len) |