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1 | /* |
1 | /* |
2 | * Copyright (C) 2005 Jakub Jermar |
2 | * Copyright (C) 2005 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | #ifndef __ia64_ATOMIC_H__ |
29 | #ifndef __ia64_ATOMIC_H__ |
30 | #define __ia64_ATOMIC_H__ |
30 | #define __ia64_ATOMIC_H__ |
31 | 31 | ||
32 | #include <arch/types.h> |
32 | #include <arch/types.h> |
33 | 33 | ||
34 | typedef volatile __u64 atomic_t; |
34 | typedef struct { volatile __u64 count; } atomic_t; |
35 | 35 | ||
36 | static inline atomic_t atomic_add(atomic_t *val, int imm) |
36 | static inline atomic_t atomic_add(atomic_t *val, int imm) |
37 | { |
37 | { |
38 | atomic_t v; |
38 | atomic_t v; |
39 | 39 | ||
40 | 40 | ||
41 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (*val) : "i" (imm)); |
41 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); |
42 | 42 | ||
43 | return v; |
43 | return v; |
44 | } |
44 | } |
- | 45 | ||
- | 46 | static inline void atomic_set(atomic_t *val, __u64 i) |
|
- | 47 | { |
|
- | 48 | val->count = i; |
|
- | 49 | } |
|
- | 50 | ||
- | 51 | static inline __u32 atomic_get(atomic_t *val) |
|
- | 52 | { |
|
- | 53 | return val->count; |
|
- | 54 | } |
|
45 | 55 | ||
46 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
56 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
47 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
57 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
48 | 58 | ||
49 | 59 | ||
50 | static inline atomic_t atomic_inc_pre(atomic_t *val) { return atomic_add(val, 1); } |
60 | static inline atomic_t atomic_inc_pre(atomic_t *val) { return atomic_add(val, 1); } |
51 | static inline atomic_t atomic_dec_pre(atomic_t *val) { return atomic_add(val, -1); } |
61 | static inline atomic_t atomic_dec_pre(atomic_t *val) { return atomic_add(val, -1); } |
52 | 62 | ||
53 | 63 | ||
54 | static inline atomic_t atomic_inc_post(atomic_t *val) { return atomic_add(val, 1) + 1; } |
64 | static inline atomic_t atomic_inc_post(atomic_t *val) { return atomic_add(val, 1) + 1; } |
55 | static inline atomic_t atomic_dec_post(atomic_t *val) { return atomic_add(val, -1) - 1; } |
65 | static inline atomic_t atomic_dec_post(atomic_t *val) { return atomic_add(val, -1) - 1; } |
56 | 66 | ||
57 | #endif |
67 | #endif |
58 | 68 |