1 #ifndef __ASM_SH_CACHEFLUSH_H 2 #define __ASM_SH_CACHEFLUSH_H 3 4 #ifdef __KERNEL__ 5 6 #ifdef CONFIG_CACHE_OFF 7 /* 8 * Nothing to do when the cache is disabled, initial flush and explicit 9 * disabling is handled at CPU init time. 10 * 11 * See arch/sh/kernel/cpu/init.c:cache_init(). 12 */ 13 #define p3_cache_init() do { } while (0) 14 #define flush_cache_all() do { } while (0) 15 #define flush_cache_mm(mm) do { } while (0) 16 #define flush_cache_dup_mm(mm) do { } while (0) 17 #define flush_cache_range(vma, start, end) do { } while (0) 18 #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 19 #define flush_dcache_page(page) do { } while (0) 20 #define flush_icache_range(start, end) do { } while (0) 21 #define flush_icache_page(vma,pg) do { } while (0) 22 #define flush_dcache_mmap_lock(mapping) do { } while (0) 23 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 24 #define flush_cache_sigtramp(vaddr) do { } while (0) 25 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 26 #define __flush_wback_region(start, size) do { (void)(start); } while (0) 27 #define __flush_purge_region(start, size) do { (void)(start); } while (0) 28 #define __flush_invalidate_region(start, size) do { (void)(start); } while (0) 29 #else 30 #include <cpu/cacheflush.h> 31 32 /* 33 * Consistent DMA requires that the __flush_xxx() primitives must be set 34 * for any of the enabled non-coherent caches (most of the UP CPUs), 35 * regardless of PIPT or VIPT cache configurations. 36 */ 37 38 /* Flush (write-back only) a region (smaller than a page) */ 39 extern void __flush_wback_region(void *start, int size); 40 /* Flush (write-back & invalidate) a region (smaller than a page) */ 41 extern void __flush_purge_region(void *start, int size); 42 /* Flush (invalidate only) a region (smaller than a page) */ 43 extern void __flush_invalidate_region(void *start, int size); 44 #endif 45 46 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE 47 static inline void flush_kernel_dcache_page(struct page *page) 48 { 49 flush_dcache_page(page); 50 } 51 52 #if defined(CONFIG_CPU_SH4) && !defined(CONFIG_CACHE_OFF) 53 extern void copy_to_user_page(struct vm_area_struct *vma, 54 struct page *page, unsigned long vaddr, void *dst, const void *src, 55 unsigned long len); 56 57 extern void copy_from_user_page(struct vm_area_struct *vma, 58 struct page *page, unsigned long vaddr, void *dst, const void *src, 59 unsigned long len); 60 #else 61 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 62 do { \ 63 flush_cache_page(vma, vaddr, page_to_pfn(page));\ 64 memcpy(dst, src, len); \ 65 flush_icache_user_range(vma, page, vaddr, len); \ 66 } while (0) 67 68 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 69 do { \ 70 flush_cache_page(vma, vaddr, page_to_pfn(page));\ 71 memcpy(dst, src, len); \ 72 } while (0) 73 #endif 74 75 #define flush_cache_vmap(start, end) flush_cache_all() 76 #define flush_cache_vunmap(start, end) flush_cache_all() 77 78 #endif /* __KERNEL__ */ 79 #endif /* __ASM_SH_CACHEFLUSH_H */ 80