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| Rev | Author | Line No. | Line |
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| 112 | jermar | 1 | /* |
| 2071 | jermar | 2 | * Copyright (c) 2005 Jakub Jermar |
| 112 | jermar | 3 | * All rights reserved. |
| 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 | |||
| 1888 | jermar | 29 | /** @addtogroup ia64 |
| 1702 | cejka | 30 | * @{ |
| 31 | */ |
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| 32 | /** @file |
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| 33 | */ |
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| 34 | |||
| 1888 | jermar | 35 | #ifndef KERN_ia64_ATOMIC_H_ |
| 36 | #define KERN_ia64_ATOMIC_H_ |
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| 112 | jermar | 37 | |
| 627 | jermar | 38 | /** Atomic addition. |
| 39 | * |
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| 40 | * @param val Atomic value. |
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| 41 | * @param imm Value to add. |
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| 42 | * |
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| 1024 | jermar | 43 | * @return Value before addition. |
| 627 | jermar | 44 | */ |
| 1104 | jermar | 45 | static inline long atomic_add(atomic_t *val, int imm) |
| 475 | jermar | 46 | { |
| 1104 | jermar | 47 | long v; |
| 475 | jermar | 48 | |
| 2082 | decky | 49 | asm volatile ("fetchadd8.rel %0 = %1, %2\n" : "=r" (v), "+m" (val->count) : "i" (imm)); |
| 477 | vana | 50 | |
| 475 | jermar | 51 | return v; |
| 112 | jermar | 52 | } |
| 53 | |||
| 3593 | rimsky | 54 | |
| 55 | static inline uint64_t test_and_set(atomic_t *val) { |
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| 56 | uint64_t v; |
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| 57 | |||
| 58 | asm volatile ( |
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| 59 | "movl %0=0x01;;\n" |
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| 60 | "xchg8 %0=%1,%0;;\n" |
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| 61 | : "=r" (v),"+m" (val->count) |
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| 62 | ); |
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| 63 | |||
| 64 | return v; |
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| 65 | } |
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| 66 | |||
| 67 | |||
| 477 | vana | 68 | static inline void atomic_inc(atomic_t *val) { atomic_add(val, 1); } |
| 69 | static inline void atomic_dec(atomic_t *val) { atomic_add(val, -1); } |
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| 475 | jermar | 70 | |
| 1104 | jermar | 71 | static inline long atomic_preinc(atomic_t *val) { return atomic_add(val, 1) + 1; } |
| 72 | static inline long atomic_predec(atomic_t *val) { return atomic_add(val, -1) - 1; } |
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| 477 | vana | 73 | |
| 1104 | jermar | 74 | static inline long atomic_postinc(atomic_t *val) { return atomic_add(val, 1); } |
| 75 | static inline long atomic_postdec(atomic_t *val) { return atomic_add(val, -1); } |
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| 477 | vana | 76 | |
| 112 | jermar | 77 | #endif |
| 1702 | cejka | 78 | |
| 1888 | jermar | 79 | /** @} |
| 1702 | cejka | 80 | */ |