1 #ifndef _M68KNOMMU_CACHEFLUSH_H 2 #define _M68KNOMMU_CACHEFLUSH_H 3 4 /* 5 * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com> 6 */ 7 #include <linux/mm.h> 8 #include <asm/mcfsim.h> 9 10 #define flush_cache_all() __flush_cache_all() 11 #define flush_cache_mm(mm) do { } while (0) 12 #define flush_cache_dup_mm(mm) do { } while (0) 13 #define flush_cache_range(vma, start, end) do { } while (0) 14 #define flush_cache_page(vma, vmaddr) do { } while (0) 15 #define flush_dcache_range(start, len) __flush_dcache_all() 16 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 17 #define flush_dcache_page(page) do { } while (0) 18 #define flush_dcache_mmap_lock(mapping) do { } while (0) 19 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 20 #define flush_icache_range(start, len) __flush_icache_all() 21 #define flush_icache_page(vma,pg) do { } while (0) 22 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 23 #define flush_cache_vmap(start, end) do { } while (0) 24 #define flush_cache_vunmap(start, end) do { } while (0) 25 26 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 27 memcpy(dst, src, len) 28 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 29 memcpy(dst, src, len) 30 31 void mcf_cache_push(void); 32 33 static inline void __clear_cache_all(void) 34 { 35 #ifdef CACHE_INVALIDATE 36 __asm__ __volatile__ ( 37 "movel %0, %%d0\n\t" 38 "movec %%d0, %%CACR\n\t" 39 "nop\n\t" 40 : : "i" (CACHE_INVALIDATE) : "d0" ); 41 #endif 42 } 43 44 static inline void __flush_cache_all(void) 45 { 46 #ifdef CACHE_PUSH 47 mcf_cache_push(); 48 #endif 49 __clear_cache_all(); 50 } 51 52 /* 53 * Some ColdFire parts implement separate instruction and data caches, 54 * on those we should just flush the appropriate cache. If we don't need 55 * to do any specific flushing then this will be optimized away. 56 */ 57 static inline void __flush_icache_all(void) 58 { 59 #ifdef CACHE_INVALIDATEI 60 __asm__ __volatile__ ( 61 "movel %0, %%d0\n\t" 62 "movec %%d0, %%CACR\n\t" 63 "nop\n\t" 64 : : "i" (CACHE_INVALIDATEI) : "d0" ); 65 #endif 66 } 67 68 static inline void __flush_dcache_all(void) 69 { 70 #ifdef CACHE_PUSH 71 mcf_cache_push(); 72 #endif 73 #ifdef CACHE_INVALIDATED 74 __asm__ __volatile__ ( 75 "movel %0, %%d0\n\t" 76 "movec %%d0, %%CACR\n\t" 77 "nop\n\t" 78 : : "i" (CACHE_INVALIDATED) : "d0" ); 79 #else 80 /* Flush the wrtite buffer */ 81 __asm__ __volatile__ ( "nop" ); 82 #endif 83 } 84 85 /* 86 * Push cache entries at supplied address. We want to write back any dirty 87 * data and the invalidate the cache lines associated with this address. 88 */ 89 static inline void cache_push(unsigned long paddr, int len) 90 { 91 __flush_cache_all(); 92 } 93 94 /* 95 * Clear cache entries at supplied address (that is don't write back any 96 * dirty data). 97 */ 98 static inline void cache_clear(unsigned long paddr, int len) 99 { 100 __clear_cache_all(); 101 } 102 103 #endif /* _M68KNOMMU_CACHEFLUSH_H */ 104