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 __flush_cache_all(void) 34 { 35 #ifdef CACHE_PUSH 36 mcf_cache_push(); 37 #endif 38 #ifdef CACHE_INVALIDATE 39 __asm__ __volatile__ ( 40 "movel %0, %%d0\n\t" 41 "movec %%d0, %%CACR\n\t" 42 "nop\n\t" 43 : : "i" (CACHE_INVALIDATE) : "d0" ); 44 #endif 45 } 46 47 /* 48 * Some ColdFire parts implement separate instruction and data caches, 49 * on those we should just flush the appropriate cache. If we don't need 50 * to do any specific flushing then this will be optimized away. 51 */ 52 static inline void __flush_icache_all(void) 53 { 54 #ifdef CACHE_INVALIDATEI 55 __asm__ __volatile__ ( 56 "movel %0, %%d0\n\t" 57 "movec %%d0, %%CACR\n\t" 58 "nop\n\t" 59 : : "i" (CACHE_INVALIDATEI) : "d0" ); 60 #endif 61 } 62 63 static inline void __flush_dcache_all(void) 64 { 65 #ifdef CACHE_PUSH 66 mcf_cache_push(); 67 #endif 68 #ifdef CACHE_INVALIDATED 69 __asm__ __volatile__ ( 70 "movel %0, %%d0\n\t" 71 "movec %%d0, %%CACR\n\t" 72 "nop\n\t" 73 : : "i" (CACHE_INVALIDATED) : "d0" ); 74 #else 75 /* Flush the wrtite buffer */ 76 __asm__ __volatile__ ( "nop" ); 77 #endif 78 } 79 #endif /* _M68KNOMMU_CACHEFLUSH_H */ 80