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 #include <asm/system.h>
  20
  21 #define __copy_from_user        __copy_from_user
  22 #define __copy_to_user          __copy_to_user
  23 #define __strncpy_from_user     __strncpy_from_user
  24 #define __strnlen_user          __strnlen_user
  25 #define __clear_user            __clear_user
  26
  27 #define __kernel_ok             (segment_eq(get_fs(), KERNEL_DS))
  28 #define __user_ok(addr, size)   (((size) <= TASK_SIZE)                  \
  29                                 && ((addr) <= TASK_SIZE - (size)))
  30 #define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
  31
  32 extern unsigned long __must_check
  33 __copy_from_user(void *to, const void __user *from, unsigned long n);
  34 extern unsigned long __must_check
  35 __copy_to_user(void __user *to, const void *from, unsigned long n);
  36 extern unsigned long __must_check
  37 __clear_user(void __user *addr, unsigned long n);
  38 extern unsigned long __must_check
  39 __strncpy_from_user(char *to, const char __user *from, unsigned long count);
  40 extern unsigned long
  41 __strnlen_user(const char __user *s, long n);
  42
  43 #include <asm-generic/uaccess.h>
  44
  45 extern int fixup_exception(struct pt_regs *regs);
  46
  47 #endif /* __UNICORE_UACCESS_H__ */