1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _M68KNOMMU_CACHEFLUSH_H 3 #define _M68KNOMMU_CACHEFLUSH_H 4 5 /* 6 * (C) Copyright 2000-2010, Greg Ungerer <gerg@snapgear.com> 7 */ 8 #include <linux/mm.h> 9 #include <asm/mcfsim.h> 10 11 #define flush_cache_all() __flush_cache_all() 12 #define flush_cache_mm(mm) do { } while (0) 13 #define flush_cache_dup_mm(mm) do { } while (0) 14 #define flush_cache_range(vma, start, end) do { } while (0) 15 #define flush_cache_page(vma, vmaddr) do { } while (0) 16 #define flush_dcache_range(start, len) __flush_dcache_all() 17 #define ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE 0 18 #define flush_dcache_page(page) do { } while (0) 19 #define flush_dcache_mmap_lock(mapping) do { } while (0) 20 #define flush_dcache_mmap_unlock(mapping) do { } while (0) 21 #define flush_icache_range(start, len) __flush_icache_all() 22 #define flush_icache_page(vma,pg) do { } while (0) 23 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0) 24 #define flush_cache_vmap(start, end) do { } while (0) 25 #define flush_cache_vunmap(start, end) do { } while (0) 26 27 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \ 28 memcpy(dst, src, len) 29 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \ 30 memcpy(dst, src, len) 31 32 void mcf_cache_push(void); 33 34 static inline void __clear_cache_all(void) 35 { 36 #ifdef CACHE_INVALIDATE 37 __asm__ __volatile__ ( 38 "movec %0, %%CACR\n\t" 39 "nop\n\t" 40 : : "r" (CACHE_INVALIDATE) ); 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 "movec %0, %%CACR\n\t" 62 "nop\n\t" 63 : : "r" (CACHE_INVALIDATEI) ); 64 #endif 65 } 66 67 static inline void __flush_dcache_all(void) 68 { 69 #ifdef CACHE_PUSH 70 mcf_cache_push(); 71 #endif 72 #ifdef CACHE_INVALIDATED 73 __asm__ __volatile__ ( 74 "movec %0, %%CACR\n\t" 75 "nop\n\t" 76 : : "r" (CACHE_INVALIDATED) ); 77 #else 78 /* Flush the write buffer */ 79 __asm__ __volatile__ ( "nop" ); 80 #endif 81 } 82 83 /* 84 * Push cache entries at supplied address. We want to write back any dirty 85 * data and then invalidate the cache lines associated with this address. 86 */ 87 static inline void cache_push(unsigned long paddr, int len) 88 { 89 __flush_cache_all(); 90 } 91 92 /* 93 * Clear cache entries at supplied address (that is don't write back any 94 * dirty data). 95 */ 96 static inline void cache_clear(unsigned long paddr, int len) 97 { 98 __clear_cache_all(); 99 } 100 101 #endif /* _M68KNOMMU_CACHEFLUSH_H */ 102