arch/mn10300/mm/cache.c

   1 /* MN10300 Cache flushing routines
   2  *
   3  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public Licence
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the Licence, or (at your option) any later version.
  10  */
  11 #include <linux/module.h>
  12 #include <linux/mm.h>
  13 #include <linux/mman.h>
  14 #include <linux/threads.h>
  15 #include <asm/page.h>
  16 #include <asm/pgtable.h>
  17 #include <asm/processor.h>
  18 #include <asm/cacheflush.h>
  19 #include <asm/io.h>
  20 #include <asm/uaccess.h>
  21
  22 EXPORT_SYMBOL(mn10300_icache_inv);
  23 EXPORT_SYMBOL(mn10300_dcache_inv);
  24 EXPORT_SYMBOL(mn10300_dcache_inv_range);
  25 EXPORT_SYMBOL(mn10300_dcache_inv_range2);
  26 EXPORT_SYMBOL(mn10300_dcache_inv_page);
  27
  28 #ifdef CONFIG_MN10300_CACHE_WBACK
  29 EXPORT_SYMBOL(mn10300_dcache_flush);
  30 EXPORT_SYMBOL(mn10300_dcache_flush_inv);
  31 EXPORT_SYMBOL(mn10300_dcache_flush_inv_range);
  32 EXPORT_SYMBOL(mn10300_dcache_flush_inv_range2);
  33 EXPORT_SYMBOL(mn10300_dcache_flush_inv_page);
  34 EXPORT_SYMBOL(mn10300_dcache_flush_range);
  35 EXPORT_SYMBOL(mn10300_dcache_flush_range2);
  36 EXPORT_SYMBOL(mn10300_dcache_flush_page);
  37 #endif
  38
  39 /*
  40  * allow userspace to flush the instruction cache
  41  */
  42 asmlinkage long sys_cacheflush(unsigned long start, unsigned long end)
  43 {
  44         if (end < start)
  45                 return -EINVAL;
  46
  47         flush_icache_range(start, end);
  48         return 0;
  49 }