1#ifndef _ASM_UACCESS_H
2#define _ASM_UACCESS_H
3
4
5
6
7
8#ifdef __KERNEL__
9#include <linux/errno.h>
10#include <linux/compiler.h>
11#include <linux/string.h>
12#include <linux/thread_info.h>
13#include <asm/asi.h>
14#include <asm/spitfire.h>
15#include <asm-generic/uaccess-unaligned.h>
16#include <asm/extable_64.h>
17#endif
18
19#ifndef __ASSEMBLY__
20
21#include <asm/processor.h>
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36#define KERNEL_DS ((mm_segment_t) { ASI_P })
37#define USER_DS ((mm_segment_t) { ASI_AIUS })
38
39#define VERIFY_READ 0
40#define VERIFY_WRITE 1
41
42#define get_fs() ((mm_segment_t){(current_thread_info()->current_ds)})
43#define get_ds() (KERNEL_DS)
44
45#define segment_eq(a, b) ((a).seg == (b).seg)
46
47#define set_fs(val) \
48do { \
49 current_thread_info()->current_ds = (val).seg; \
50 __asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \
51} while(0)
52
53
54
55
56
57static inline bool __chk_range_not_ok(unsigned long addr, unsigned long size, unsigned long limit)
58{
59 if (__builtin_constant_p(size))
60 return addr > limit - size;
61
62 addr += size;
63 if (addr < size)
64 return true;
65
66 return addr > limit;
67}
68
69#define __range_not_ok(addr, size, limit) \
70({ \
71 __chk_user_ptr(addr); \
72 __chk_range_not_ok((unsigned long __force)(addr), size, limit); \
73})
74
75static inline int __access_ok(const void __user * addr, unsigned long size)
76{
77 return 1;
78}
79
80static inline int access_ok(int type, const void __user * addr, unsigned long size)
81{
82 return 1;
83}
84
85void __retl_efault(void);
86
87
88
89
90
91
92
93
94
95
96#define put_user(x, ptr) ({ \
97 unsigned long __pu_addr = (unsigned long)(ptr); \
98 __chk_user_ptr(ptr); \
99 __put_user_nocheck((__typeof__(*(ptr)))(x), __pu_addr, sizeof(*(ptr)));\
100})
101
102#define get_user(x, ptr) ({ \
103 unsigned long __gu_addr = (unsigned long)(ptr); \
104 __chk_user_ptr(ptr); \
105 __get_user_nocheck((x), __gu_addr, sizeof(*(ptr)), __typeof__(*(ptr)));\
106})
107
108#define __put_user(x, ptr) put_user(x, ptr)
109#define __get_user(x, ptr) get_user(x, ptr)
110
111struct __large_struct { unsigned long buf[100]; };
112#define __m(x) ((struct __large_struct *)(x))
113
114#define __put_user_nocheck(data, addr, size) ({ \
115 register int __pu_ret; \
116 switch (size) { \
117 case 1: __put_user_asm(data, b, addr, __pu_ret); break; \
118 case 2: __put_user_asm(data, h, addr, __pu_ret); break; \
119 case 4: __put_user_asm(data, w, addr, __pu_ret); break; \
120 case 8: __put_user_asm(data, x, addr, __pu_ret); break; \
121 default: __pu_ret = __put_user_bad(); break; \
122 } \
123 __pu_ret; \
124})
125
126#define __put_user_asm(x, size, addr, ret) \
127__asm__ __volatile__( \
128 "/* Put user asm, inline. */\n" \
129 "1:\t" "st"#size "a %1, [%2] %%asi\n\t" \
130 "clr %0\n" \
131 "2:\n\n\t" \
132 ".section .fixup,#alloc,#execinstr\n\t" \
133 ".align 4\n" \
134 "3:\n\t" \
135 "sethi %%hi(2b), %0\n\t" \
136 "jmpl %0 + %%lo(2b), %%g0\n\t" \
137 " mov %3, %0\n\n\t" \
138 ".previous\n\t" \
139 ".section __ex_table,\"a\"\n\t" \
140 ".align 4\n\t" \
141 ".word 1b, 3b\n\t" \
142 ".previous\n\n\t" \
143 : "=r" (ret) : "r" (x), "r" (__m(addr)), \
144 "i" (-EFAULT))
145
146int __put_user_bad(void);
147
148#define __get_user_nocheck(data, addr, size, type) ({ \
149 register int __gu_ret; \
150 register unsigned long __gu_val; \
151 switch (size) { \
152 case 1: __get_user_asm(__gu_val, ub, addr, __gu_ret); break; \
153 case 2: __get_user_asm(__gu_val, uh, addr, __gu_ret); break; \
154 case 4: __get_user_asm(__gu_val, uw, addr, __gu_ret); break; \
155 case 8: __get_user_asm(__gu_val, x, addr, __gu_ret); break; \
156 default: \
157 __gu_val = 0; \
158 __gu_ret = __get_user_bad(); \
159 break; \
160 } \
161 data = (__force type) __gu_val; \
162 __gu_ret; \
163})
164
165#define __get_user_asm(x, size, addr, ret) \
166__asm__ __volatile__( \
167 "/* Get user asm, inline. */\n" \
168 "1:\t" "ld"#size "a [%2] %%asi, %1\n\t" \
169 "clr %0\n" \
170 "2:\n\n\t" \
171 ".section .fixup,#alloc,#execinstr\n\t" \
172 ".align 4\n" \
173 "3:\n\t" \
174 "sethi %%hi(2b), %0\n\t" \
175 "clr %1\n\t" \
176 "jmpl %0 + %%lo(2b), %%g0\n\t" \
177 " mov %3, %0\n\n\t" \
178 ".previous\n\t" \
179 ".section __ex_table,\"a\"\n\t" \
180 ".align 4\n\t" \
181 ".word 1b, 3b\n\n\t" \
182 ".previous\n\t" \
183 : "=r" (ret), "=r" (x) : "r" (__m(addr)), \
184 "i" (-EFAULT))
185
186int __get_user_bad(void);
187
188unsigned long __must_check ___copy_from_user(void *to,
189 const void __user *from,
190 unsigned long size);
191static inline unsigned long __must_check
192copy_from_user(void *to, const void __user *from, unsigned long size)
193{
194 check_object_size(to, size, false);
195
196 return ___copy_from_user(to, from, size);
197}
198#define __copy_from_user copy_from_user
199
200unsigned long __must_check ___copy_to_user(void __user *to,
201 const void *from,
202 unsigned long size);
203static inline unsigned long __must_check
204copy_to_user(void __user *to, const void *from, unsigned long size)
205{
206 check_object_size(from, size, true);
207
208 return ___copy_to_user(to, from, size);
209}
210#define __copy_to_user copy_to_user
211
212unsigned long __must_check ___copy_in_user(void __user *to,
213 const void __user *from,
214 unsigned long size);
215static inline unsigned long __must_check
216copy_in_user(void __user *to, void __user *from, unsigned long size)
217{
218 return ___copy_in_user(to, from, size);
219}
220#define __copy_in_user copy_in_user
221
222unsigned long __must_check __clear_user(void __user *, unsigned long);
223
224#define clear_user __clear_user
225
226__must_check long strlen_user(const char __user *str);
227__must_check long strnlen_user(const char __user *str, long n);
228
229#define __copy_to_user_inatomic __copy_to_user
230#define __copy_from_user_inatomic __copy_from_user
231
232struct pt_regs;
233unsigned long compute_effective_address(struct pt_regs *,
234 unsigned int insn,
235 unsigned int rd);
236
237#endif
238
239#endif
240