arch/sh/mm/pg-nommu.c

   1 /*
   2  * arch/sh/mm/pg-nommu.c
   3  *
   4  * clear_page()/copy_page() implementation for MMUless SH.
   5  *
   6  * Copyright (C) 2003  Paul Mundt
   7  *
   8  * This file is subject to the terms and conditions of the GNU General Public
   9  * License.  See the file "COPYING" in the main directory of this archive
  10  * for more details.
  11  */
  12 #include <linux/init.h>
  13 #include <linux/kernel.h>
  14 #include <linux/string.h>
  15 #include <asm/page.h>
  16 #include <asm/uaccess.h>
  17
  18 void copy_page(void *to, void *from)
  19 {
  20         memcpy(to, from, PAGE_SIZE);
  21 }
  22
  23 void clear_page(void *to)
  24 {
  25         memset(to, 0, PAGE_SIZE);
  26 }
  27
  28 __kernel_size_t __copy_user(void *to, const void *from, __kernel_size_t n)
  29 {
  30         memcpy(to, from, n);
  31         return 0;
  32 }
  33
  34 __kernel_size_t __clear_user(void *to, __kernel_size_t n)
  35 {
  36         memset(to, 0, n);
  37         return 0;
  38 }