LXR linux/arch/unicore32/include/asm/uaccess.h

   1/*
   2 * linux/arch/unicore32/include/asm/uaccess.h
   3 *
   4 * Code specific to PKUnity SoC and UniCore ISA
   5 *
   6 * Copyright (C) 2001-2010 GUAN Xue-tao
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License version 2 as
  10 * published by the Free Software Foundation.
  11 */
  12#ifndef __UNICORE_UACCESS_H__
  13#define __UNICORE_UACCESS_H__
  14
  15#include <linux/thread_info.h>
  16#include <linux/errno.h>
  17
  18#include <asm/memory.h>
  19
  20#define __copy_from_user        __copy_from_user
  21#define __copy_to_user          __copy_to_user
  22#define __strncpy_from_user     __strncpy_from_user
  23#define __strnlen_user          __strnlen_user
  24#define __clear_user            __clear_user
  25
  26#define __kernel_ok             (segment_eq(get_fs(), KERNEL_DS))
  27#define __user_ok(addr, size)   (((size) <= TASK_SIZE)                  \
  28                                && ((addr) <= TASK_SIZE - (size)))
  29#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
  30
  31extern unsigned long __must_check
  32__copy_from_user(void *to, const void __user *from, unsigned long n);
  33extern unsigned long __must_check
  34__copy_to_user(void __user *to, const void *from, unsigned long n);
  35extern unsigned long __must_check
  36__clear_user(void __user *addr, unsigned long n);
  37extern unsigned long __must_check
  38__strncpy_from_user(char *to, const char __user *from, unsigned long count);
  39extern unsigned long
  40__strnlen_user(const char __user *s, long n);
  41
  42#include <asm-generic/uaccess.h>
  43
  44extern int fixup_exception(struct pt_regs *regs);
  45
  46#endif /* __UNICORE_UACCESS_H__ */
  47