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 "movec %0, %%CACR\n\t" 38 "nop\n\t" 39 : : "r" (CACHE_INVALIDATE) ); 40 #endif 41 } 42 43 static inline void __flush_cache_all(void) 44 { 45 #ifdef CACHE_PUSH 46 mcf_cache_push(); 47 #endif 48 __clear_cache_all(); 49 } 50 51 /* 52 * Some ColdFire parts implement separate instruction and data caches, 53 * on those we should just flush the appropriate cache. If we don't need 54 * to do any specific flushing then this will be optimized away. 55 */ 56 static inline void __flush_icache_all(void) 57 { 58 #ifdef CACHE_INVALIDATEI 59 __asm__ __volatile__ ( 60 "movec %0, %%CACR\n\t" 61 "nop\n\t" 62 : : "r" (CACHE_INVALIDATEI) ); 63 #endif 64 } 65 66 static inline void __flush_dcache_all(void) 67 { 68 #ifdef CACHE_PUSH 69 mcf_cache_push(); 70 #endif 71 #ifdef CACHE_INVALIDATED 72 __asm__ __volatile__ ( 73 "movec %0, %%CACR\n\t" 74 "nop\n\t" 75 : : "r" (CACHE_INVALIDATED) ); 76 #else 77 /* Flush the write buffer */ 78 __asm__ __volatile__ ( "nop" ); 79 #endif 80 } 81 82 /* 83 * Push cache entries at supplied address. We want to write back any dirty 84 * data and then invalidate the cache lines associated with this address. 85 */ 86 static inline void cache_push(unsigned long paddr, int len) 87 { 88 __flush_cache_all(); 89 } 90 91 /* 92 * Clear cache entries at supplied address (that is don't write back any 93 * dirty data). 94 */ 95 static inline void cache_clear(unsigned long paddr, int len) 96 { 97 __clear_cache_all(); 98 } 99 100 #endif /* _M68KNOMMU_CACHEFLUSH_H */ 101