arch/m68k/include/asm/cacheflush_no.h

   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 */