Rev 1398 | Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1160 | decky | 1 | /* |
| 2 | * Copyright (C) 2005 Martin Decky |
||
| 3 | * All rights reserved. |
||
| 4 | * |
||
| 5 | * Redistribution and use in source and binary forms, with or without |
||
| 6 | * modification, are permitted provided that the following conditions |
||
| 7 | * are met: |
||
| 8 | * |
||
| 9 | * - Redistributions of source code must retain the above copyright |
||
| 10 | * notice, this list of conditions and the following disclaimer. |
||
| 11 | * - Redistributions in binary form must reproduce the above copyright |
||
| 12 | * notice, this list of conditions and the following disclaimer in the |
||
| 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 |
||
| 15 | * derived from this software without specific prior written permission. |
||
| 16 | * |
||
| 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 |
||
| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
||
| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
||
| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
||
| 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 |
||
| 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 |
||
| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
||
| 27 | */ |
||
| 28 | |||
| 29 | #ifndef __ppc64_ATOMIC_H__ |
||
| 30 | #define __ppc64_ATOMIC_H__ |
||
| 31 | |||
| 32 | static inline void atomic_inc(atomic_t *val) |
||
| 33 | { |
||
| 34 | long tmp; |
||
| 35 | |||
| 36 | asm __volatile__ ( |
||
| 37 | "1:\n" |
||
| 38 | "lwarx %0, 0, %2\n" |
||
| 39 | "addic %0, %0, 1\n" |
||
| 40 | "stwcx. %0, 0, %2\n" |
||
| 41 | "bne- 1b" |
||
| 42 | : "=&r" (tmp), "=m" (val->count) |
||
| 43 | : "r" (&val->count), "m" (val->count) |
||
| 44 | : "cc"); |
||
| 45 | } |
||
| 46 | |||
| 47 | static inline void atomic_dec(atomic_t *val) |
||
| 48 | { |
||
| 49 | long tmp; |
||
| 50 | |||
| 51 | asm __volatile__( |
||
| 52 | "1:\n" |
||
| 53 | "lwarx %0, 0, %2\n" |
||
| 54 | "addic %0, %0, -1\n" |
||
| 55 | "stwcx. %0, 0, %2\n" |
||
| 56 | "bne- 1b" |
||
| 57 | : "=&r" (tmp), "=m" (val->count) |
||
| 58 | : "r" (&val->count), "m" (val->count) |
||
| 59 | : "cc"); |
||
| 60 | } |
||
| 61 | |||
| 62 | static inline long atomic_postinc(atomic_t *val) |
||
| 63 | { |
||
| 64 | atomic_inc(val); |
||
| 65 | return val->count - 1; |
||
| 66 | } |
||
| 67 | |||
| 68 | static inline long atomic_postdec(atomic_t *val) |
||
| 69 | { |
||
| 70 | atomic_dec(val); |
||
| 71 | return val->count + 1; |
||
| 72 | } |
||
| 73 | |||
| 74 | static inline long atomic_preinc(atomic_t *val) |
||
| 75 | { |
||
| 76 | atomic_inc(val); |
||
| 77 | return val->count; |
||
| 78 | } |
||
| 79 | |||
| 80 | static inline long atomic_predec(atomic_t *val) |
||
| 81 | { |
||
| 82 | atomic_dec(val); |
||
| 83 | return val->count; |
||
| 84 | } |
||
| 85 | |||
| 86 | #endif |