leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

unicore32 additional architecture files: low-level lib: uaccess

Browse Source 
This patch implements low-level uaccess libraries.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>
Acked-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
GuanXuetao
2011-02-26 18:49:26 +08:00
parent 28bab059a2
commit 77c93b2f23
8 changed files with 648 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

47
arch/unicore32/include/asm/uaccess.h Normal file
View File

@@ -0,0 +1,47 @@
/*
* linux/arch/unicore32/include/asm/uaccess.h
*
* Code specific to PKUnity SoC and UniCore ISA
*
* Copyright (C) 2001-2010 GUAN Xue-tao
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef __UNICORE_UACCESS_H__
#define __UNICORE_UACCESS_H__
#include <linux/thread_info.h>
#include <linux/errno.h>
#include <asm/memory.h>
#include <asm/system.h>
#define __copy_from_user __copy_from_user
#define __copy_to_user __copy_to_user
#define __strncpy_from_user __strncpy_from_user
#define __strnlen_user __strnlen_user
#define __clear_user __clear_user
#define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
#define __user_ok(addr, size) (((size) <= TASK_SIZE) \
&& ((addr) <= TASK_SIZE - (size)))
#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
extern unsigned long __must_check
__copy_from_user(void *to, const void __user *from, unsigned long n);
extern unsigned long __must_check
__copy_to_user(void __user *to, const void *from, unsigned long n);
extern unsigned long __must_check
__clear_user(void __user *addr, unsigned long n);
extern unsigned long __must_check
__strncpy_from_user(char *to, const char __user *from, unsigned long count);
extern unsigned long
__strnlen_user(const char __user *s, long n);
#include <asm-generic/uaccess.h>
extern int fixup_exception(struct pt_regs *regs);
#endif /* __UNICORE_UACCESS_H__ */