diff options
author | Michal Simek <monstr@monstr.eu> | 2009-03-27 09:25:23 -0400 |
---|---|---|
committer | Michal Simek <monstr@monstr.eu> | 2009-03-27 09:25:23 -0400 |
commit | 2660663ff2d34a3665381a2591bbc3ce0cdbd69c (patch) | |
tree | 46cc31cc8d95ffc37b5362990e0940bf0461f9c1 /arch/microblaze/include/asm/uaccess.h | |
parent | 89272a51b322aa14332d58896b9d377ea9b4e551 (diff) |
microblaze_v8: uaccess files
Reviewed-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Stephen Neuendorffer <stephen.neuendorffer@xilinx.com>
Acked-by: John Linn <john.linn@xilinx.com>
Acked-by: John Williams <john.williams@petalogix.com>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze/include/asm/uaccess.h')
-rw-r--r-- | arch/microblaze/include/asm/uaccess.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h new file mode 100644 index 000000000000..5a3ffc308e12 --- /dev/null +++ b/arch/microblaze/include/asm/uaccess.h | |||
@@ -0,0 +1,134 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2006 Atmark Techno, Inc. | ||
3 | * | ||
4 | * This file is subject to the terms and conditions of the GNU General Public | ||
5 | * License. See the file "COPYING" in the main directory of this archive | ||
6 | * for more details. | ||
7 | */ | ||
8 | |||
9 | #ifndef _ASM_MICROBLAZE_UACCESS_H | ||
10 | #define _ASM_MICROBLAZE_UACCESS_H | ||
11 | |||
12 | #ifdef __KERNEL__ | ||
13 | #ifndef __ASSEMBLY__ | ||
14 | |||
15 | #include <linux/kernel.h> | ||
16 | #include <linux/errno.h> | ||
17 | #include <linux/sched.h> /* RLIMIT_FSIZE */ | ||
18 | #include <linux/mm.h> | ||
19 | |||
20 | #include <asm/mmu.h> | ||
21 | #include <asm/page.h> | ||
22 | #include <asm/pgtable.h> | ||
23 | #include <asm/segment.h> | ||
24 | #include <linux/string.h> | ||
25 | |||
26 | #define VERIFY_READ 0 | ||
27 | #define VERIFY_WRITE 1 | ||
28 | |||
29 | extern int ___range_ok(unsigned long addr, unsigned long size); | ||
30 | |||
31 | #define __range_ok(addr, size) \ | ||
32 | ___range_ok((unsigned long)(addr), (unsigned long)(size)) | ||
33 | |||
34 | #define access_ok(type, addr, size) (__range_ok((addr), (size)) == 0) | ||
35 | #define __access_ok(add, size) (__range_ok((addr), (size)) == 0) | ||
36 | |||
37 | extern inline int bad_user_access_length(void) | ||
38 | { | ||
39 | return 0; | ||
40 | } | ||
41 | /* FIXME this is function for optimalization -> memcpy */ | ||
42 | #define __get_user(var, ptr) \ | ||
43 | ({ \ | ||
44 | int __gu_err = 0; \ | ||
45 | switch (sizeof(*(ptr))) { \ | ||
46 | case 1: \ | ||
47 | case 2: \ | ||
48 | case 4: \ | ||
49 | (var) = *(ptr); \ | ||
50 | break; \ | ||
51 | case 8: \ | ||
52 | memcpy((void *) &(var), (ptr), 8); \ | ||
53 | break; \ | ||
54 | default: \ | ||
55 | (var) = 0; \ | ||
56 | __gu_err = __get_user_bad(); \ | ||
57 | break; \ | ||
58 | } \ | ||
59 | __gu_err; \ | ||
60 | }) | ||
61 | |||
62 | #define __get_user_bad() (bad_user_access_length(), (-EFAULT)) | ||
63 | |||
64 | #define __put_user(var, ptr) \ | ||
65 | ({ \ | ||
66 | int __pu_err = 0; \ | ||
67 | switch (sizeof(*(ptr))) { \ | ||
68 | case 1: \ | ||
69 | case 2: \ | ||
70 | case 4: \ | ||
71 | *(ptr) = (var); \ | ||
72 | break; \ | ||
73 | case 8: { \ | ||
74 | typeof(*(ptr)) __pu_val = var; \ | ||
75 | memcpy(ptr, &__pu_val, sizeof(__pu_val));\ | ||
76 | } \ | ||
77 | break; \ | ||
78 | default: \ | ||
79 | __pu_err = __put_user_bad(); \ | ||
80 | break; \ | ||
81 | } \ | ||
82 | __pu_err; \ | ||
83 | }) | ||
84 | |||
85 | #define __put_user_bad() (bad_user_access_length(), (-EFAULT)) | ||
86 | |||
87 | #define put_user(x, ptr) __put_user(x, ptr) | ||
88 | #define get_user(x, ptr) __get_user(x, ptr) | ||
89 | |||
90 | #define copy_to_user(to, from, n) (memcpy(to, from, n), 0) | ||
91 | #define copy_from_user(to, from, n) (memcpy(to, from, n), 0) | ||
92 | |||
93 | #define __copy_to_user(to, from, n) (copy_to_user(to, from, n)) | ||
94 | #define __copy_from_user(to, from, n) (copy_from_user(to, from, n)) | ||
95 | #define __copy_to_user_inatomic(to, from, n) (__copy_to_user(to, from, n)) | ||
96 | #define __copy_from_user_inatomic(to, from, n) (__copy_from_user(to, from, n)) | ||
97 | |||
98 | #define __clear_user(addr, n) (memset((void *)addr, 0, n), 0) | ||
99 | |||
100 | static inline unsigned long clear_user(void *addr, unsigned long size) | ||
101 | { | ||
102 | if (access_ok(VERIFY_WRITE, addr, size)) | ||
103 | size = __clear_user(addr, size); | ||
104 | return size; | ||
105 | } | ||
106 | |||
107 | /* Returns 0 if exception not found and fixup otherwise. */ | ||
108 | extern unsigned long search_exception_table(unsigned long); | ||
109 | |||
110 | |||
111 | extern long strncpy_from_user(char *dst, const char __user *src, long count); | ||
112 | extern long strnlen_user(const char __user *src, long count); | ||
113 | extern long __strncpy_from_user(char *dst, const char __user *src, long count); | ||
114 | |||
115 | /* | ||
116 | * The exception table consists of pairs of addresses: the first is the | ||
117 | * address of an instruction that is allowed to fault, and the second is | ||
118 | * the address at which the program should continue. No registers are | ||
119 | * modified, so it is entirely up to the continuation code to figure out | ||
120 | * what to do. | ||
121 | * | ||
122 | * All the routines below use bits of fixup code that are out of line | ||
123 | * with the main instruction path. This means when everything is well, | ||
124 | * we don't even have to jump over them. Further, they do not intrude | ||
125 | * on our cache or tlb entries. | ||
126 | */ | ||
127 | struct exception_table_entry { | ||
128 | unsigned long insn, fixup; | ||
129 | }; | ||
130 | |||
131 | #endif /* __ASSEMBLY__ */ | ||
132 | #endif /* __KERNEL__ */ | ||
133 | |||
134 | #endif /* _ASM_MICROBLAZE_UACCESS_H */ | ||