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6
7#include <linux/module.h>
8#include <asm/uaccess.h>
9
10unsigned long __generic_copy_from_user(void *to, const void __user *from,
11 unsigned long n)
12{
13 unsigned long tmp, res;
14
15 asm volatile ("\n"
16 " tst.l %0\n"
17 " jeq 2f\n"
18 "1: "MOVES".l (%1)+,%3\n"
19 " move.l %3,(%2)+\n"
20 " subq.l #1,%0\n"
21 " jne 1b\n"
22 "2: btst #1,%5\n"
23 " jeq 4f\n"
24 "3: "MOVES".w (%1)+,%3\n"
25 " move.w %3,(%2)+\n"
26 "4: btst #0,%5\n"
27 " jeq 6f\n"
28 "5: "MOVES".b (%1)+,%3\n"
29 " move.b %3,(%2)+\n"
30 "6:\n"
31 " .section .fixup,\"ax\"\n"
32 " .even\n"
33 "10: move.l %0,%3\n"
34 "7: clr.l (%2)+\n"
35 " subq.l #1,%3\n"
36 " jne 7b\n"
37 " lsl.l #2,%0\n"
38 " btst #1,%5\n"
39 " jeq 8f\n"
40 "30: clr.w (%2)+\n"
41 " addq.l #2,%0\n"
42 "8: btst #0,%5\n"
43 " jeq 6b\n"
44 "50: clr.b (%2)+\n"
45 " addq.l #1,%0\n"
46 " jra 6b\n"
47 " .previous\n"
48 "\n"
49 " .section __ex_table,\"a\"\n"
50 " .align 4\n"
51 " .long 1b,10b\n"
52 " .long 3b,30b\n"
53 " .long 5b,50b\n"
54 " .previous"
55 : "=d" (res), "+a" (from), "+a" (to), "=&d" (tmp)
56 : "0" (n / 4), "d" (n & 3));
57
58 return res;
59}
60EXPORT_SYMBOL(__generic_copy_from_user);
61
62unsigned long __generic_copy_to_user(void __user *to, const void *from,
63 unsigned long n)
64{
65 unsigned long tmp, res;
66
67 asm volatile ("\n"
68 " tst.l %0\n"
69 " jeq 4f\n"
70 "1: move.l (%1)+,%3\n"
71 "2: "MOVES".l %3,(%2)+\n"
72 "3: subq.l #1,%0\n"
73 " jne 1b\n"
74 "4: btst #1,%5\n"
75 " jeq 6f\n"
76 " move.w (%1)+,%3\n"
77 "5: "MOVES".w %3,(%2)+\n"
78 "6: btst #0,%5\n"
79 " jeq 8f\n"
80 " move.b (%1)+,%3\n"
81 "7: "MOVES".b %3,(%2)+\n"
82 "8:\n"
83 " .section .fixup,\"ax\"\n"
84 " .even\n"
85 "20: lsl.l #2,%0\n"
86 "50: add.l %5,%0\n"
87 " jra 8b\n"
88 " .previous\n"
89 "\n"
90 " .section __ex_table,\"a\"\n"
91 " .align 4\n"
92 " .long 2b,20b\n"
93 " .long 3b,20b\n"
94 " .long 5b,50b\n"
95 " .long 6b,50b\n"
96 " .long 7b,50b\n"
97 " .long 8b,50b\n"
98 " .previous"
99 : "=d" (res), "+a" (from), "+a" (to), "=&d" (tmp)
100 : "0" (n / 4), "d" (n & 3));
101
102 return res;
103}
104EXPORT_SYMBOL(__generic_copy_to_user);
105
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108
109
110unsigned long __clear_user(void __user *to, unsigned long n)
111{
112 unsigned long res;
113
114 asm volatile ("\n"
115 " tst.l %0\n"
116 " jeq 3f\n"
117 "1: "MOVES".l %2,(%1)+\n"
118 "2: subq.l #1,%0\n"
119 " jne 1b\n"
120 "3: btst #1,%4\n"
121 " jeq 5f\n"
122 "4: "MOVES".w %2,(%1)+\n"
123 "5: btst #0,%4\n"
124 " jeq 7f\n"
125 "6: "MOVES".b %2,(%1)\n"
126 "7:\n"
127 " .section .fixup,\"ax\"\n"
128 " .even\n"
129 "10: lsl.l #2,%0\n"
130 "40: add.l %4,%0\n"
131 " jra 7b\n"
132 " .previous\n"
133 "\n"
134 " .section __ex_table,\"a\"\n"
135 " .align 4\n"
136 " .long 1b,10b\n"
137 " .long 2b,10b\n"
138 " .long 4b,40b\n"
139 " .long 5b,40b\n"
140 " .long 6b,40b\n"
141 " .long 7b,40b\n"
142 " .previous"
143 : "=d" (res), "+a" (to)
144 : "d" (0), "0" (n / 4), "d" (n & 3));
145
146 return res;
147}
148EXPORT_SYMBOL(__clear_user);
149
