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Linux/arch/m68k/include/asm/cacheflush_no.h

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  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 

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