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1/* una_asm.S: Kernel unaligned trap assembler helpers.
2 *
3 * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 */
6
7#include <linux/errno.h>
8
9 .text
10
11retl_efault:
12 retl
13 mov -EFAULT, %o0
14
15 /* int __do_int_store(unsigned long *dst_addr, int size,
16 * unsigned long *src_val)
17 *
18 * %o0 = dest_addr
19 * %o1 = size
20 * %o2 = src_val
21 *
22 * Return '0' on success, -EFAULT on failure.
23 */
24 .globl __do_int_store
25__do_int_store:
26 ld [%o2], %g1
27 cmp %o1, 2
28 be 2f
29 cmp %o1, 4
30 be 1f
31 srl %g1, 24, %g2
32 srl %g1, 16, %g7
334: stb %g2, [%o0]
34 srl %g1, 8, %g2
355: stb %g7, [%o0 + 1]
36 ld [%o2 + 4], %g7
376: stb %g2, [%o0 + 2]
38 srl %g7, 24, %g2
397: stb %g1, [%o0 + 3]
40 srl %g7, 16, %g1
418: stb %g2, [%o0 + 4]
42 srl %g7, 8, %g2
439: stb %g1, [%o0 + 5]
4410: stb %g2, [%o0 + 6]
45 b 0f
4611: stb %g7, [%o0 + 7]
471: srl %g1, 16, %g7
4812: stb %g2, [%o0]
49 srl %g1, 8, %g2
5013: stb %g7, [%o0 + 1]
5114: stb %g2, [%o0 + 2]
52 b 0f
5315: stb %g1, [%o0 + 3]
542: srl %g1, 8, %g2
5516: stb %g2, [%o0]
5617: stb %g1, [%o0 + 1]
570: retl
58 mov 0, %o0
59
60 .section __ex_table,#alloc
61 .word 4b, retl_efault
62 .word 5b, retl_efault
63 .word 6b, retl_efault
64 .word 7b, retl_efault
65 .word 8b, retl_efault
66 .word 9b, retl_efault
67 .word 10b, retl_efault
68 .word 11b, retl_efault
69 .word 12b, retl_efault
70 .word 13b, retl_efault
71 .word 14b, retl_efault
72 .word 15b, retl_efault
73 .word 16b, retl_efault
74 .word 17b, retl_efault
75 .previous
76
77 /* int do_int_load(unsigned long *dest_reg, int size,
78 * unsigned long *saddr, int is_signed)
79 *
80 * %o0 = dest_reg
81 * %o1 = size
82 * %o2 = saddr
83 * %o3 = is_signed
84 *
85 * Return '0' on success, -EFAULT on failure.
86 */
87 .globl do_int_load
88do_int_load:
89 cmp %o1, 8
90 be 9f
91 cmp %o1, 4
92 be 6f
934: ldub [%o2], %g1
945: ldub [%o2 + 1], %g2
95 sll %g1, 8, %g1
96 tst %o3
97 be 3f
98 or %g1, %g2, %g1
99 sll %g1, 16, %g1
100 sra %g1, 16, %g1
1013: b 0f
102 st %g1, [%o0]
1036: ldub [%o2 + 1], %g2
104 sll %g1, 24, %g1
1057: ldub [%o2 + 2], %g7
106 sll %g2, 16, %g2
1078: ldub [%o2 + 3], %g3
108 sll %g7, 8, %g7
109 or %g3, %g2, %g3
110 or %g7, %g3, %g7
111 or %g1, %g7, %g1
112 b 0f
113 st %g1, [%o0]
1149: ldub [%o2], %g1
11510: ldub [%o2 + 1], %g2
116 sll %g1, 24, %g1
11711: ldub [%o2 + 2], %g7
118 sll %g2, 16, %g2
11912: ldub [%o2 + 3], %g3
120 sll %g7, 8, %g7
121 or %g1, %g2, %g1
122 or %g7, %g3, %g7
123 or %g1, %g7, %g7
12413: ldub [%o2 + 4], %g1
125 st %g7, [%o0]
12614: ldub [%o2 + 5], %g2
127 sll %g1, 24, %g1
12815: ldub [%o2 + 6], %g7
129 sll %g2, 16, %g2
13016: ldub [%o2 + 7], %g3
131 sll %g7, 8, %g7
132 or %g1, %g2, %g1
133 or %g7, %g3, %g7
134 or %g1, %g7, %g7
135 st %g7, [%o0 + 4]
1360: retl
137 mov 0, %o0
138
139 .section __ex_table,#alloc
140 .word 4b, retl_efault
141 .word 5b, retl_efault
142 .word 6b, retl_efault
143 .word 7b, retl_efault
144 .word 8b, retl_efault
145 .word 9b, retl_efault
146 .word 10b, retl_efault
147 .word 11b, retl_efault
148 .word 12b, retl_efault
149 .word 13b, retl_efault
150 .word 14b, retl_efault
151 .word 15b, retl_efault
152 .word 16b, retl_efault
153 .previous
1/* SPDX-License-Identifier: GPL-2.0 */
2/* una_asm.S: Kernel unaligned trap assembler helpers.
3 *
4 * Copyright (C) 1996,2005,2008 David S. Miller (davem@davemloft.net)
5 * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 */
7
8#include <linux/errno.h>
9
10 .text
11
12retl_efault:
13 retl
14 mov -EFAULT, %o0
15
16 /* int __do_int_store(unsigned long *dst_addr, int size,
17 * unsigned long *src_val)
18 *
19 * %o0 = dest_addr
20 * %o1 = size
21 * %o2 = src_val
22 *
23 * Return '0' on success, -EFAULT on failure.
24 */
25 .globl __do_int_store
26__do_int_store:
27 ld [%o2], %g1
28 cmp %o1, 2
29 be 2f
30 cmp %o1, 4
31 be 1f
32 srl %g1, 24, %g2
33 srl %g1, 16, %g7
344: stb %g2, [%o0]
35 srl %g1, 8, %g2
365: stb %g7, [%o0 + 1]
37 ld [%o2 + 4], %g7
386: stb %g2, [%o0 + 2]
39 srl %g7, 24, %g2
407: stb %g1, [%o0 + 3]
41 srl %g7, 16, %g1
428: stb %g2, [%o0 + 4]
43 srl %g7, 8, %g2
449: stb %g1, [%o0 + 5]
4510: stb %g2, [%o0 + 6]
46 b 0f
4711: stb %g7, [%o0 + 7]
481: srl %g1, 16, %g7
4912: stb %g2, [%o0]
50 srl %g1, 8, %g2
5113: stb %g7, [%o0 + 1]
5214: stb %g2, [%o0 + 2]
53 b 0f
5415: stb %g1, [%o0 + 3]
552: srl %g1, 8, %g2
5616: stb %g2, [%o0]
5717: stb %g1, [%o0 + 1]
580: retl
59 mov 0, %o0
60
61 .section __ex_table,#alloc
62 .word 4b, retl_efault
63 .word 5b, retl_efault
64 .word 6b, retl_efault
65 .word 7b, retl_efault
66 .word 8b, retl_efault
67 .word 9b, retl_efault
68 .word 10b, retl_efault
69 .word 11b, retl_efault
70 .word 12b, retl_efault
71 .word 13b, retl_efault
72 .word 14b, retl_efault
73 .word 15b, retl_efault
74 .word 16b, retl_efault
75 .word 17b, retl_efault
76 .previous
77
78 /* int do_int_load(unsigned long *dest_reg, int size,
79 * unsigned long *saddr, int is_signed)
80 *
81 * %o0 = dest_reg
82 * %o1 = size
83 * %o2 = saddr
84 * %o3 = is_signed
85 *
86 * Return '0' on success, -EFAULT on failure.
87 */
88 .globl do_int_load
89do_int_load:
90 cmp %o1, 8
91 be 9f
92 cmp %o1, 4
93 be 6f
944: ldub [%o2], %g1
955: ldub [%o2 + 1], %g2
96 sll %g1, 8, %g1
97 tst %o3
98 be 3f
99 or %g1, %g2, %g1
100 sll %g1, 16, %g1
101 sra %g1, 16, %g1
1023: b 0f
103 st %g1, [%o0]
1046: ldub [%o2 + 1], %g2
105 sll %g1, 24, %g1
1067: ldub [%o2 + 2], %g7
107 sll %g2, 16, %g2
1088: ldub [%o2 + 3], %g3
109 sll %g7, 8, %g7
110 or %g3, %g2, %g3
111 or %g7, %g3, %g7
112 or %g1, %g7, %g1
113 b 0f
114 st %g1, [%o0]
1159: ldub [%o2], %g1
11610: ldub [%o2 + 1], %g2
117 sll %g1, 24, %g1
11811: ldub [%o2 + 2], %g7
119 sll %g2, 16, %g2
12012: ldub [%o2 + 3], %g3
121 sll %g7, 8, %g7
122 or %g1, %g2, %g1
123 or %g7, %g3, %g7
124 or %g1, %g7, %g7
12513: ldub [%o2 + 4], %g1
126 st %g7, [%o0]
12714: ldub [%o2 + 5], %g2
128 sll %g1, 24, %g1
12915: ldub [%o2 + 6], %g7
130 sll %g2, 16, %g2
13116: ldub [%o2 + 7], %g3
132 sll %g7, 8, %g7
133 or %g1, %g2, %g1
134 or %g7, %g3, %g7
135 or %g1, %g7, %g7
136 st %g7, [%o0 + 4]
1370: retl
138 mov 0, %o0
139
140 .section __ex_table,#alloc
141 .word 4b, retl_efault
142 .word 5b, retl_efault
143 .word 6b, retl_efault
144 .word 7b, retl_efault
145 .word 8b, retl_efault
146 .word 9b, retl_efault
147 .word 10b, retl_efault
148 .word 11b, retl_efault
149 .word 12b, retl_efault
150 .word 13b, retl_efault
151 .word 14b, retl_efault
152 .word 15b, retl_efault
153 .word 16b, retl_efault
154 .previous