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| Rev | Author | Line No. | Line |
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| 112 | jermar | 1 | /* |
| 2 | * Copyright (C) 2005 Jakub Jermar |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * - Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * - Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * - The name of the author may not be used to endorse or promote products |
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| 15 | * derived from this software without specific prior written permission. |
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| 16 | * |
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 27 | */ |
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| 28 | |||
| 29 | #ifndef __ia64_ATOMIC_H__ |
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| 30 | #define __ia64_ATOMIC_H__ |
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| 31 | |||
| 475 | jermar | 32 | #include <arch/types.h> |
| 112 | jermar | 33 | |
| 475 | jermar | 34 | typedef volatile __u64 atomic_t; |
| 112 | jermar | 35 | |
| 475 | jermar | 36 | static inline atomic_t atomic_add(atomic_t *val, int imm) |
| 37 | { |
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| 38 | atomic_t v; |
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| 39 | |||
| 477 | vana | 40 | |
| 41 | __asm__ volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (*val) : "i" (imm)); |
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| 42 | |||
| 475 | jermar | 43 | *val += imm; |
| 44 | |||
| 45 | return v; |
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| 112 | jermar | 46 | } |
| 47 | |||
| 477 | vana | 48 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
| 49 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
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| 475 | jermar | 50 | |
| 477 | vana | 51 | |
| 52 | static inline atomic_t atomic_inc_pre(atomic_t *val) { return atomic_add(val, 1); } |
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| 53 | static inline atomic_t atomic_dec_pre(atomic_t *val) { return atomic_add(val, -1); } |
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| 54 | |||
| 55 | |||
| 56 | static inline atomic_t atomic_inc_post(atomic_t *val) { return atomic_add(val, 1)+1; } |
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| 57 | static inline atomic_t atomic_dec_post(atomic_t *val) { return atomic_add(val, -1)-1; } |
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| 58 | |||
| 59 | |||
| 60 | |||
| 61 | |||
| 112 | jermar | 62 | #endif |