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 31 extern unsigned long __must_check 32 __copy_from_user(void *to, const void __user *from, unsigned long n); 33 extern unsigned long __must_check 34 __copy_to_user(void __user *to, const void *from, unsigned long n); 35 extern unsigned long __must_check 36 __clear_user(void __user *addr, unsigned long n); 37 extern unsigned long __must_check 38 __strncpy_from_user(char *to, const char __user *from, unsigned long count); 39 extern unsigned long 40 __strnlen_user(const char __user *s, long n); 41 42 #include <asm-generic/uaccess.h> 43 44 extern int fixup_exception(struct pt_regs *regs); 45 46 #endif /* __UNICORE_UACCESS_H__ */ 47