1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * User space memory access functions
4 *
5 * Copyright (C) 1999, 2002 Niibe Yutaka
6 * Copyright (C) 2003 - 2008 Paul Mundt
7 *
8 * Based on:
9 * MIPS implementation version 1.15 by
10 * Copyright (C) 1996, 1997, 1998 by Ralf Baechle
11 * and i386 version.
12 */
13 #ifndef __ASM_SH_UACCESS_32_H
14 #define __ASM_SH_UACCESS_32_H
15
16 #define __get_user_size(x,ptr,size,retval) \
17 do { \
18 retval = 0; \
19 switch (size) { \
20 case 1: \
21 __get_user_asm(x, ptr, retval, "b"); \
22 break; \
23 case 2: \
24 __get_user_asm(x, ptr, retval, "w"); \
25 break; \
26 case 4: \
27 __get_user_asm(x, ptr, retval, "l"); \
28 break; \
29 default: \
30 __get_user_unknown(); \
31 break; \
32 } \
33 } while (0)
34
35 #ifdef CONFIG_MMU
36 #define __get_user_asm(x, addr, err, insn) \
37 ({ \
38 __asm__ __volatile__( \
39 "1:\n\t" \
40 "mov." insn " %2, %1\n\t" \
41 "2:\n" \
42 ".section .fixup,\"ax\"\n" \
43 "3:\n\t" \
44 "mov #0, %1\n\t" \
45 "mov.l 4f, %0\n\t" \
46 "jmp @%0\n\t" \
47 " mov %3, %0\n\t" \
48 ".balign 4\n" \
49 "4: .long 2b\n\t" \
50 ".previous\n" \
51 ".section __ex_table,\"a\"\n\t" \
52 ".long 1b, 3b\n\t" \
53 ".previous" \
54 :"=&r" (err), "=&r" (x) \
55 :"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
56 #else
57 #define __get_user_asm(x, addr, err, insn) \
58 do { \
59 __asm__ __volatile__ ( \
60 "mov." insn " %1, %0\n\t" \
61 : "=&r" (x) \
62 : "m" (__m(addr)) \
63 ); \
64 } while (0)
65 #endif /* CONFIG_MMU */
66
67 extern void __get_user_unknown(void);
68
69 #define __put_user_size(x,ptr,size,retval) \
70 do { \
71 retval = 0; \
72 switch (size) { \
73 case 1: \
74 __put_user_asm(x, ptr, retval, "b"); \
75 break; \
76 case 2: \
77 __put_user_asm(x, ptr, retval, "w"); \
78 break; \
79 case 4: \
80 __put_user_asm(x, ptr, retval, "l"); \
81 break; \
82 case 8: \
83 __put_user_u64(x, ptr, retval); \
84 break; \
85 default: \
86 __put_user_unknown(); \
87 } \
88 } while (0)
89
90 #ifdef CONFIG_MMU
91 #define __put_user_asm(x, addr, err, insn) \
92 do { \
93 __asm__ __volatile__ ( \
94 "1:\n\t" \
95 "mov." insn " %1, %2\n\t" \
96 "2:\n" \
97 ".section .fixup,\"ax\"\n" \
98 "3:\n\t" \
99 "mov.l 4f, %0\n\t" \
100 "jmp @%0\n\t" \
101 " mov %3, %0\n\t" \
102 ".balign 4\n" \
103 "4: .long 2b\n\t" \
104 ".previous\n" \
105 ".section __ex_table,\"a\"\n\t" \
106 ".long 1b, 3b\n\t" \
107 ".previous" \
108 : "=&r" (err) \
109 : "r" (x), "m" (__m(addr)), "i" (-EFAULT), \
110 "0" (err) \
111 : "memory" \
112 ); \
113 } while (0)
114 #else
115 #define __put_user_asm(x, addr, err, insn) \
116 do { \
117 __asm__ __volatile__ ( \
118 "mov." insn " %0, %1\n\t" \
119 : /* no outputs */ \
120 : "r" (x), "m" (__m(addr)) \
121 : "memory" \
122 ); \
123 } while (0)
124 #endif /* CONFIG_MMU */
125
126 #if defined(CONFIG_CPU_LITTLE_ENDIAN)
127 #define __put_user_u64(val,addr,retval) \
128 ({ \
129 __asm__ __volatile__( \
130 "1:\n\t" \
131 "mov.l %R1,%2\n\t" \
132 "mov.l %S1,%T2\n\t" \
133 "2:\n" \
134 ".section .fixup,\"ax\"\n" \
135 "3:\n\t" \
136 "mov.l 4f,%0\n\t" \
137 "jmp @%0\n\t" \
138 " mov %3,%0\n\t" \
139 ".balign 4\n" \
140 "4: .long 2b\n\t" \
141 ".previous\n" \
142 ".section __ex_table,\"a\"\n\t" \
143 ".long 1b, 3b\n\t" \
144 ".previous" \
145 : "=r" (retval) \
146 : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
147 : "memory"); })
148 #else
149 #define __put_user_u64(val,addr,retval) \
150 ({ \
151 __asm__ __volatile__( \
152 "1:\n\t" \
153 "mov.l %S1,%2\n\t" \
154 "mov.l %R1,%T2\n\t" \
155 "2:\n" \
156 ".section .fixup,\"ax\"\n" \
157 "3:\n\t" \
158 "mov.l 4f,%0\n\t" \
159 "jmp @%0\n\t" \
160 " mov %3,%0\n\t" \
161 ".balign 4\n" \
162 "4: .long 2b\n\t" \
163 ".previous\n" \
164 ".section __ex_table,\"a\"\n\t" \
165 ".long 1b, 3b\n\t" \
166 ".previous" \
167 : "=r" (retval) \
168 : "r" (val), "m" (__m(addr)), "i" (-EFAULT), "0" (retval) \
169 : "memory"); })
170 #endif
171
172 extern void __put_user_unknown(void);
173
174 #endif /* __ASM_SH_UACCESS_32_H */