1#ifndef __H8300_UACCESS_H
2#define __H8300_UACCESS_H
3
4
5
6
7#include <linux/sched.h>
8#include <linux/mm.h>
9#include <linux/string.h>
10
11#include <asm/segment.h>
12
13#define VERIFY_READ 0
14#define VERIFY_WRITE 1
15
16
17#define access_ok(type, addr, size) __access_ok((unsigned long)addr,size)
18static inline int __access_ok(unsigned long addr, unsigned long size)
19{
20#define RANGE_CHECK_OK(addr, size, lower, upper) \
21 (((addr) >= (lower)) && (((addr) + (size)) < (upper)))
22
23 extern unsigned long _ramend;
24 return(RANGE_CHECK_OK(addr, size, 0L, (unsigned long)&_ramend));
25}
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40struct exception_table_entry
41{
42 unsigned long insn, fixup;
43};
44
45
46extern unsigned long search_exception_table(unsigned long);
47
48
49
50
51
52
53
54#define put_user(x, ptr) \
55({ \
56 int __pu_err = 0; \
57 typeof(*(ptr)) __pu_val = (x); \
58 switch (sizeof (*(ptr))) { \
59 case 1: \
60 case 2: \
61 case 4: \
62 *(ptr) = (__pu_val); \
63 break; \
64 case 8: \
65 memcpy(ptr, &__pu_val, sizeof (*(ptr))); \
66 break; \
67 default: \
68 __pu_err = __put_user_bad(); \
69 break; \
70 } \
71 __pu_err; \
72})
73#define __put_user(x, ptr) put_user(x, ptr)
74
75extern int __put_user_bad(void);
76
77
78
79
80
81
82
83#define __ptr(x) ((unsigned long *)(x))
84
85
86
87
88
89
90
91#define get_user(x, ptr) \
92({ \
93 int __gu_err = 0; \
94 typeof(*(ptr)) __gu_val = *ptr; \
95 switch (sizeof(*(ptr))) { \
96 case 1: \
97 case 2: \
98 case 4: \
99 case 8: \
100 break; \
101 default: \
102 __gu_err = __get_user_bad(); \
103 break; \
104 } \
105 (x) = __gu_val; \
106 __gu_err; \
107})
108#define __get_user(x, ptr) get_user(x, ptr)
109
110extern int __get_user_bad(void);
111
112#define copy_from_user(to, from, n) (memcpy(to, from, n), 0)
113#define copy_to_user(to, from, n) (memcpy(to, from, n), 0)
114
115#define __copy_from_user(to, from, n) copy_from_user(to, from, n)
116#define __copy_to_user(to, from, n) copy_to_user(to, from, n)
117#define __copy_to_user_inatomic __copy_to_user
118#define __copy_from_user_inatomic __copy_from_user
119
120#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n)) return retval; })
121
122#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n)) return retval; })
123
124
125
126
127
128static inline long
129strncpy_from_user(char *dst, const char *src, long count)
130{
131 char *tmp;
132 strncpy(dst, src, count);
133 for (tmp = dst; *tmp && count > 0; tmp++, count--)
134 ;
135 return(tmp - dst);
136}
137
138
139
140
141
142
143static inline long strnlen_user(const char *src, long n)
144{
145 return(strlen(src) + 1);
146}
147
148#define strlen_user(str) strnlen_user(str, 32767)
149
150
151
152
153
154static inline unsigned long
155clear_user(void *to, unsigned long n)
156{
157 memset(to, 0, n);
158 return 0;
159}
160
161#define __clear_user clear_user
162
163#endif
164