2 * Copyright (C) 2011 Texas Instruments Incorporated
3 * Author: Mark Salter <msalter@redhat.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 #ifndef _ASM_C6X_UACCESS_H
10 #define _ASM_C6X_UACCESS_H
12 #include <linux/types.h>
13 #include <linux/compiler.h>
14 #include <linux/string.h>
16 #ifdef CONFIG_ACCESS_CHECK
17 #define __access_ok _access_ok
21 * __copy_from_user/copy_to_user are based on ones in asm-generic/uaccess.h
23 * C6X supports unaligned 32 and 64 bit loads and stores.
25 static inline __must_check long __copy_from_user(void *to,
26 const void __user *from, unsigned long n)
31 if (__builtin_constant_p(n)) {
34 *(u8 *)to = *(u8 __force *)from;
37 asm volatile ("ldnw .d1t1 *%2,%0\n"
45 asm volatile ("ldndw .d1t1 *%2,%0\n"
47 "stndw .d1t1 %0,*%1\n"
57 memcpy(to, (const void __force *)from, n);
61 static inline __must_check long __copy_to_user(void __user *to,
62 const void *from, unsigned long n)
67 if (__builtin_constant_p(n)) {
70 *(u8 __force *)to = *(u8 *)from;
73 asm volatile ("ldnw .d1t1 *%2,%0\n"
81 asm volatile ("ldndw .d1t1 *%2,%0\n"
83 "stndw .d1t1 %0,*%1\n"
93 memcpy((void __force *)to, from, n);
97 #define __copy_to_user __copy_to_user
98 #define __copy_from_user __copy_from_user
100 extern int _access_ok(unsigned long addr, unsigned long size);
101 #ifdef CONFIG_ACCESS_CHECK
102 #define __access_ok _access_ok
105 #include <asm-generic/uaccess.h>
107 #endif /* _ASM_C6X_UACCESS_H */