include/asm-m68knommu/cacheflush.h

   1 #ifndef _M68KNOMMU_CACHEFLUSH_H
   2 #define _M68KNOMMU_CACHEFLUSH_H
   3
   4 /*
   5  * (C) Copyright 2000-2002, Greg Ungerer <gerg@snapgear.com>
   6  */
   7 #include <linux/mm.h>
   8
   9 #define flush_cache_all()                       __flush_cache_all()
  10 #define flush_cache_mm(mm)                      do { } while (0)
  11 #define flush_cache_range(vma, start, end)      do { } while (0)
  12 #define flush_cache_page(vma, vmaddr)           do { } while (0)
  13 #define flush_dcache_range(start,len)           do { } while (0)
  14 #define flush_dcache_page(page)                 do { } while (0)
  15 #define flush_dcache_mmap_lock(mapping)         do { } while (0)
  16 #define flush_dcache_mmap_unlock(mapping)       do { } while (0)
  17 #define flush_icache_range(start,len)           __flush_cache_all()
  18 #define flush_icache_page(vma,pg)               do { } while (0)
  19 #define flush_icache_user_range(vma,pg,adr,len) do { } while (0)
  20 #define flush_cache_vmap(start, end)            flush_cache_all()
  21 #define flush_cache_vunmap(start, end)          flush_cache_all()
  22
  23 #define copy_to_user_page(vma, page, vaddr, dst, src, len) \
  24         memcpy(dst, src, len)
  25 #define copy_from_user_page(vma, page, vaddr, dst, src, len) \
  26         memcpy(dst, src, len)
  27
  28 extern inline void __flush_cache_all(void)
  29 {
  30 #ifdef CONFIG_M5407
  31         /*
  32          *      Use cpushl to push and invalidate all cache lines.
  33          *      Gas doesn't seem to know how to generate the ColdFire
  34          *      cpushl instruction... Oh well, bit stuff it for now.
  35          */
  36         __asm__ __volatile__ (
  37                 "nop\n\t"
  38                 "clrl   %%d0\n\t"
  39                 "1:\n\t"
  40                 "movel  %%d0,%%a0\n\t"
  41                 "2:\n\t"
  42                 ".word  0xf468\n\t"
  43                 "addl   #0x10,%%a0\n\t"
  44                 "cmpl   #0x00000800,%%a0\n\t"
  45                 "blt    2b\n\t"
  46                 "addql  #1,%%d0\n\t"
  47                 "cmpil  #4,%%d0\n\t"
  48                 "bne    1b\n\t"
  49                 "movel  #0xb6088500,%%d0\n\t"
  50                 "movec  %%d0,%%CACR\n\t"
  51                 : : : "d0", "a0" );
  52 #endif /* CONFIG_M5407 */
  53 #ifdef CONFIG_M5272
  54         __asm__ __volatile__ (
  55                 "movel  #0x01000000, %%d0\n\t"
  56                 "movec  %%d0, %%CACR\n\t"
  57                 "nop\n\t"
  58                 "movel  #0x80000100, %%d0\n\t"
  59                 "movec  %%d0, %%CACR\n\t"
  60                 "nop\n\t"
  61                 : : : "d0" );
  62 #endif /* CONFIG_M5272 */
  63 #if 0 /* CONFIG_M5249 */
  64         __asm__ __volatile__ (
  65                 "movel  #0x01000000, %%d0\n\t"
  66                 "movec  %%d0, %%CACR\n\t"
  67                 "nop\n\t"
  68                 "movel  #0xa0000200, %%d0\n\t"
  69                 "movec  %%d0, %%CACR\n\t"
  70                 "nop\n\t"
  71                 : : : "d0" );
  72 #endif /* CONFIG_M5249 */
  73 }
  74
  75 #endif /* _M68KNOMMU_CACHEFLUSH_H */