1 #ifndef __ASM_SH_CACHEFLUSH_H 2 #define __ASM_SH_CACHEFLUSH_H 3 4 #include <linux/mm.h> 5 6 #ifdef __KERNEL__ 7 8 #ifdef CONFIG_CACHE_OFF 9 /* 10 * Nothing to do when the cache is disabled, initial flush and explicit 11 * disabling is handled at CPU init time. 12 * 13 * See arch/sh/kernel/cpu/init.c:cache_init(). 14 */ 15 #define p3_cache_init() do { } while (0) 16 #define flush_cache_all() do { } while (0) 17 #define flush_cache_mm(mm) do { } while (0) 18 #define flush_cache_dup_mm(mm) do { } while (0) 19 #define flush_cache_range(vma, start, end) do { } while (0) 20 #define flush_cache_page(vma, vmaddr, pfn) do { } while (0) 21 #define flush_dcache_page(page) do { } while (0) 22 #define flush_icache_range(start, end) do { } while (0) 23 #define flush_icache_page(vma,pg) do { } while (0) 24 #define flush_dcache_mmap_lock(mapping) do { } while (0) 25 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 26 #define flush_cache_sigtramp(vaddr) do { } while (0) 27 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 28 #define __flush_wback_region(start, size) do { (void)(start); } while (0) 29 #define __flush_purge_region(start, size) do { (void)(start); } while (0) 30 #define __flush_invalidate_region(start, size) do { (void)(start); } while (0) 31 #else 32 #include <cpu/cacheflush.h> 33 34 /* 35 * Consistent DMA requires that the __flush_xxx() primitives must be set 36 * for any of the enabled non-coherent caches (most of the UP CPUs), 37 * regardless of PIPT or VIPT cache configurations. 38 */ 39 40 /* Flush (write-back only) a region (smaller than a page) */ 41 extern void __flush_wback_region(void *start, int size); 42 /* Flush (write-back & invalidate) a region (smaller than a page) */ 43 extern void __flush_purge_region(void *start, int size); 44 /* Flush (invalidate only) a region (smaller than a page) */ 45 extern void __flush_invalidate_region(void *start, int size); 46 #endif 47 48 #define ARCH_HAS_FLUSH_ANON_PAGE 49 extern void __flush_anon_page(struct page *page, unsigned long); 50 51 static inline void flush_anon_page(struct vm_area_struct *vma, 52 struct page *page, unsigned long vmaddr) 53 { 54 if (boot_cpu_data.dcache.n_aliases && PageAnon(page)) 55 __flush_anon_page(page, vmaddr); 56 } 57 58 #define ARCH_HAS_FLUSH_KERNEL_DCACHE_PAGE 59 static inline void flush_kernel_dcache_page(struct page *page) 60 { 61 flush_dcache_page(page); 62 } 63 64 extern void copy_to_user_page(struct vm_area_struct *vma, 65 struct page *page, unsigned long vaddr, void *dst, const void *src, 66 unsigned long len); 67 68 extern void copy_from_user_page(struct vm_area_struct *vma, 69 struct page *page, unsigned long vaddr, void *dst, const void *src, 70 unsigned long len); 71 72 #define flush_cache_vmap(start, end) flush_cache_all() 73 #define flush_cache_vunmap(start, end) flush_cache_all() 74 75 void kmap_coherent_init(void); 76 void *kmap_coherent(struct page *page, unsigned long addr); 77 void kunmap_coherent(void); 78 79 #define PG_dcache_dirty PG_arch_1 80 81 #endif /* __KERNEL__ */ 82 #endif /* __ASM_SH_CACHEFLUSH_H */ 83