Commit | Line | Data |
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24f287e4 | 1 | /* bitops.S: Sparc64 atomic bit operations. |
1da177e4 | 2 | * |
24f287e4 | 3 | * Copyright (C) 2000, 2007 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | */ |
5 | ||
1da177e4 | 6 | #include <asm/asi.h> |
24f287e4 | 7 | #include <asm/backoff.h> |
1da177e4 | 8 | |
b445e26c DM |
9 | .text |
10 | ||
1da177e4 LT |
11 | .globl test_and_set_bit |
12 | .type test_and_set_bit,#function | |
13 | test_and_set_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 14 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
15 | srlx %o0, 6, %g1 |
16 | mov 1, %o2 | |
17 | sllx %g1, 3, %g3 | |
18 | and %o0, 63, %g2 | |
19 | sllx %o2, %g2, %o2 | |
20 | add %o1, %g3, %o1 | |
21 | 1: ldx [%o1], %g7 | |
22 | or %g7, %o2, %g1 | |
23 | casx [%o1], %g7, %g1 | |
24 | cmp %g7, %g1 | |
24f287e4 | 25 | bne,pn %xcc, 2f |
1da177e4 | 26 | and %g7, %o2, %g2 |
1da177e4 | 27 | clr %o0 |
b445e26c | 28 | movrne %g2, 1, %o0 |
1da177e4 | 29 | retl |
b445e26c | 30 | nop |
24f287e4 | 31 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 LT |
32 | .size test_and_set_bit, .-test_and_set_bit |
33 | ||
34 | .globl test_and_clear_bit | |
35 | .type test_and_clear_bit,#function | |
36 | test_and_clear_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 37 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
38 | srlx %o0, 6, %g1 |
39 | mov 1, %o2 | |
40 | sllx %g1, 3, %g3 | |
41 | and %o0, 63, %g2 | |
42 | sllx %o2, %g2, %o2 | |
43 | add %o1, %g3, %o1 | |
44 | 1: ldx [%o1], %g7 | |
45 | andn %g7, %o2, %g1 | |
46 | casx [%o1], %g7, %g1 | |
47 | cmp %g7, %g1 | |
24f287e4 | 48 | bne,pn %xcc, 2f |
1da177e4 | 49 | and %g7, %o2, %g2 |
1da177e4 | 50 | clr %o0 |
b445e26c | 51 | movrne %g2, 1, %o0 |
1da177e4 | 52 | retl |
b445e26c | 53 | nop |
24f287e4 | 54 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 LT |
55 | .size test_and_clear_bit, .-test_and_clear_bit |
56 | ||
57 | .globl test_and_change_bit | |
58 | .type test_and_change_bit,#function | |
59 | test_and_change_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 60 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
61 | srlx %o0, 6, %g1 |
62 | mov 1, %o2 | |
63 | sllx %g1, 3, %g3 | |
64 | and %o0, 63, %g2 | |
65 | sllx %o2, %g2, %o2 | |
66 | add %o1, %g3, %o1 | |
67 | 1: ldx [%o1], %g7 | |
68 | xor %g7, %o2, %g1 | |
69 | casx [%o1], %g7, %g1 | |
70 | cmp %g7, %g1 | |
24f287e4 | 71 | bne,pn %xcc, 2f |
1da177e4 | 72 | and %g7, %o2, %g2 |
1da177e4 | 73 | clr %o0 |
b445e26c | 74 | movrne %g2, 1, %o0 |
1da177e4 | 75 | retl |
b445e26c | 76 | nop |
24f287e4 | 77 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 LT |
78 | .size test_and_change_bit, .-test_and_change_bit |
79 | ||
80 | .globl set_bit | |
81 | .type set_bit,#function | |
82 | set_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 83 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
84 | srlx %o0, 6, %g1 |
85 | mov 1, %o2 | |
86 | sllx %g1, 3, %g3 | |
87 | and %o0, 63, %g2 | |
88 | sllx %o2, %g2, %o2 | |
89 | add %o1, %g3, %o1 | |
90 | 1: ldx [%o1], %g7 | |
91 | or %g7, %o2, %g1 | |
92 | casx [%o1], %g7, %g1 | |
93 | cmp %g7, %g1 | |
24f287e4 | 94 | bne,pn %xcc, 2f |
1da177e4 LT |
95 | nop |
96 | retl | |
97 | nop | |
24f287e4 | 98 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 LT |
99 | .size set_bit, .-set_bit |
100 | ||
101 | .globl clear_bit | |
102 | .type clear_bit,#function | |
103 | clear_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 104 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
105 | srlx %o0, 6, %g1 |
106 | mov 1, %o2 | |
107 | sllx %g1, 3, %g3 | |
108 | and %o0, 63, %g2 | |
109 | sllx %o2, %g2, %o2 | |
110 | add %o1, %g3, %o1 | |
111 | 1: ldx [%o1], %g7 | |
112 | andn %g7, %o2, %g1 | |
113 | casx [%o1], %g7, %g1 | |
114 | cmp %g7, %g1 | |
24f287e4 | 115 | bne,pn %xcc, 2f |
1da177e4 LT |
116 | nop |
117 | retl | |
118 | nop | |
24f287e4 | 119 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 LT |
120 | .size clear_bit, .-clear_bit |
121 | ||
122 | .globl change_bit | |
123 | .type change_bit,#function | |
124 | change_bit: /* %o0=nr, %o1=addr */ | |
24f287e4 | 125 | BACKOFF_SETUP(%o3) |
1da177e4 LT |
126 | srlx %o0, 6, %g1 |
127 | mov 1, %o2 | |
128 | sllx %g1, 3, %g3 | |
129 | and %o0, 63, %g2 | |
130 | sllx %o2, %g2, %o2 | |
131 | add %o1, %g3, %o1 | |
132 | 1: ldx [%o1], %g7 | |
133 | xor %g7, %o2, %g1 | |
134 | casx [%o1], %g7, %g1 | |
135 | cmp %g7, %g1 | |
24f287e4 | 136 | bne,pn %xcc, 2f |
1da177e4 LT |
137 | nop |
138 | retl | |
139 | nop | |
24f287e4 | 140 | 2: BACKOFF_SPIN(%o3, %o4, 1b) |
1da177e4 | 141 | .size change_bit, .-change_bit |