arch/sh/mm/cache-sh2.c

   1 /*
   2  * arch/sh/mm/cache-sh2.c
   3  *
   4  * Copyright (C) 2002 Paul Mundt
   5  *
   6  * Released under the terms of the GNU GPL v2.0.
   7  */
   8
   9 #include <linux/init.h>
  10 #include <linux/mm.h>
  11
  12 #include <asm/cache.h>
  13 #include <asm/addrspace.h>
  14 #include <asm/processor.h>
  15 #include <asm/cacheflush.h>
  16 #include <asm/io.h>
  17
  18 void __flush_wback_region(void *start, int size)
  19 {
  20         unsigned long v;
  21         unsigned long begin, end;
  22
  23         begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
  24         end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
  25                 & ~(L1_CACHE_BYTES-1);
  26         for (v = begin; v < end; v+=L1_CACHE_BYTES) {
  27                 /* FIXME cache purge */
  28                 ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008);
  29         }
  30 }
  31
  32 void __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                 ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008);
  42         }
  43 }
  44
  45 void __flush_invalidate_region(void *start, int size)
  46 {
  47         unsigned long v;
  48         unsigned long begin, end;
  49
  50         begin = (unsigned long)start & ~(L1_CACHE_BYTES-1);
  51         end = ((unsigned long)start + size + L1_CACHE_BYTES-1)
  52                 & ~(L1_CACHE_BYTES-1);
  53         for (v = begin; v < end; v+=L1_CACHE_BYTES) {
  54                 ctrl_outl((v & 0x1ffffc00), (v & 0x00000ff0) | 0x00000008);
  55         }
  56 }
  57