arch/sh/mm/flush-sh4.c

   1 #include <linux/mm.h>
   2 #include <asm/mmu_context.h>
   3 #include <asm/cacheflush.h>
   4
   5 /*
   6  * Write back the dirty D-caches, but not invalidate them.
   7  *
   8  * START: Virtual Address (U0, P1, or P3)
   9  * SIZE: Size of the region.
  10  */
  11 void __weak __flush_wback_region(void *start, int size)
  12 {
  13         unsigned long v;
  14         unsigned long begin, end;
  15
  16         begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
  17         end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
  18                 & ~(L1_CACHE_BYTES-1);
  19         for (v = begin; v < end; v+=L1_CACHE_BYTES) {
  20                 asm volatile("ocbwb     %0"
  21                              : /* no output */
  22                              : "m" (__m(v)));
  23         }
  24 }
  25
  26 /*
  27  * Write back the dirty D-caches and invalidate them.
  28  *
  29  * START: Virtual Address (U0, P1, or P3)
  30  * SIZE: Size of the region.
  31  */
  32 void __weak __flush_purge_region(void *start, int size)
  33 {
  34         unsigned long v;
  35         unsigned long begin, end;
  36
  37         begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
  38         end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
  39                 & ~(L1_CACHE_BYTES-1);
  40         for (v = begin; v < end; v+=L1_CACHE_BYTES) {
  41                 asm volatile("ocbp      %0"
  42                              : /* no output */
  43                              : "m" (__m(v)));
  44         }
  45 }
  46
  47 /*
  48  * No write back please
  49  */
  50 void __weak __flush_invalidate_region(void *start, int size)
  51 {
  52         unsigned long v;
  53         unsigned long begin, end;
  54
  55         begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
  56         end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
  57                 & ~(L1_CACHE_BYTES-1);
  58         for (v = begin; v < end; v+=L1_CACHE_BYTES) {
  59                 asm volatile("ocbi      %0"
  60                              : /* no output */
  61                              : "m" (__m(v)));
  62         }
  63 }