2 * User space memory access functions
4 * Copyright (C) 1999, 2002 Niibe Yutaka
5 * Copyright (C) 2003 - 2008 Paul Mundt
8 * MIPS implementation version 1.15 by
9 * Copyright (C) 1996, 1997, 1998 by Ralf Baechle
12 #ifndef __ASM_SH_UACCESS_32_H
13 #define __ASM_SH_UACCESS_32_H
15 #define __get_user_size(x,ptr,size,retval) \
20 __get_user_asm(x, ptr, retval, "b"); \
23 __get_user_asm(x, ptr, retval, "w"); \
26 __get_user_asm(x, ptr, retval, "l"); \
29 __get_user_unknown(); \
35 #define __get_user_asm(x, addr, err, insn) \
37 __asm__ __volatile__( \
39 "mov." insn " %2, %1\n\t" \
41 ".section .fixup,\"ax\"\n" \
50 ".section __ex_table,\"a\"\n\t" \
53 :"=&r" (err), "=&r" (x) \
54 :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
56 #define __get_user_asm(x, addr, err, insn) \
58 __asm__ __volatile__ ( \
59 "mov." insn " %1, %0\n\t" \
64 #endif /* CONFIG_MMU */
66 extern void __get_user_unknown(void);
68 #define __put_user_size(x,ptr,size,retval) \
73 __put_user_asm(x, ptr, retval, "b"); \
76 __put_user_asm(x, ptr, retval, "w"); \
79 __put_user_asm((u32)x, ptr, \
83 __put_user_u64(x, ptr, retval); \
86 __put_user_unknown(); \
91 #define __put_user_asm(x, addr, err, insn) \
93 __asm__ __volatile__ ( \
95 "mov." insn " %1, %2\n\t" \
97 ".section .fixup,\"ax\"\n" \
105 ".section __ex_table,\"a\"\n\t" \
109 : "r" (x), "m" (__m(addr)), "i" (-EFAULT), \
115 #define __put_user_asm(x, addr, err, insn) \
117 __asm__ __volatile__ ( \
118 "mov." insn " %0, %1\n\t" \
120 : "r" (x), "m" (__m(addr)) \
124 #endif /* CONFIG_MMU */
126 #if defined(CONFIG_CPU_LITTLE_ENDIAN)
127 #define __put_user_u64(val,addr,retval) \
129 __asm__ __volatile__( \
132 "mov.l %S1,%T2\n\t" \
134 ".section .fixup,\"ax\"\n" \
142 ".section __ex_table,\"a\"\n\t" \
146 : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
149 #define __put_user_u64(val,addr,retval) \
151 __asm__ __volatile__( \
154 "mov.l %R1,%T2\n\t" \
156 ".section .fixup,\"ax\"\n" \
164 ".section __ex_table,\"a\"\n\t" \
168 : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
172 extern void __put_user_unknown(void);
175 __strncpy_from_user(unsigned long __dest, unsigned long __user __src, int __count)
178 unsigned long __dummy, _d, _s, _c;
180 __asm__ __volatile__(
193 ".section .fixup,\"ax\"\n"
201 ".section __ex_table,\"a\"\n"
205 : "=r" (res), "=&z" (__dummy), "=r" (_s), "=r" (_d), "=r"(_c)
206 : "0" (__count), "2" (__src), "3" (__dest), "4" (__count),
214 * Return the size of a string (including the ending 0 even when we have
215 * exceeded the maximum string length).
217 static inline long __strnlen_user(const char __user *__s, long __n)
220 unsigned long __dummy;
222 __asm__ __volatile__(
224 "mov.b @(%0,%3), %1\n\t"
231 ".section .fixup,\"ax\"\n"
239 ".section __ex_table,\"a\"\n"
243 : "=z" (res), "=&r" (__dummy)
244 : "0" (0), "r" (__s), "r" (__n)
249 #endif /* __ASM_SH_UACCESS_32_H */