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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 | /** @addtogroup ia64 |
29 | /** @addtogroup ia64 |
| 30 | * @{ |
30 | * @{ |
| 31 | */ |
31 | */ |
| 32 | /** @file |
32 | /** @file |
| 33 | */ |
33 | */ |
| 34 | 34 | ||
| 35 | #ifndef KERN_ia64_ATOMIC_H_ |
35 | #ifndef KERN_ia64_ATOMIC_H_ |
| 36 | #define KERN_ia64_ATOMIC_H_ |
36 | #define KERN_ia64_ATOMIC_H_ |
| 37 | 37 | ||
| 38 | /** Atomic addition. |
38 | /** Atomic addition. |
| 39 | * |
39 | * |
| 40 | * @param val Atomic value. |
40 | * @param val Atomic value. |
| 41 | * @param imm Value to add. |
41 | * @param imm Value to add. |
| 42 | * |
42 | * |
| 43 | * @return Value before addition. |
43 | * @return Value before addition. |
| 44 | */ |
44 | */ |
| 45 | static inline long atomic_add(atomic_t *val, int imm) |
45 | static inline long atomic_add(atomic_t *val, int imm) |
| 46 | { |
46 | { |
| 47 | long v; |
47 | long v; |
| 48 | 48 | ||
| 49 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); |
49 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); |
| 50 | 50 | ||
| 51 | return v; |
51 | return v; |
| 52 | } |
52 | } |
| 53 | 53 | ||
| 54 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
54 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
| 55 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
55 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
| 56 | 56 | ||
| 57 | static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; } |
57 | static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; } |
| 58 | static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; } |
58 | static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; } |
| 59 | 59 | ||
| 60 | static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); } |
60 | static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); } |
| 61 | static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); } |
61 | static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); } |
| 62 | 62 | ||
| 63 | #endif |
63 | #endif |
| 64 | 64 | ||
| 65 | /** @} |
65 | /** @} |
| 66 | */ |
66 | */ |
| 67 | 67 | ||