Rev 1267 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
156 | 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 | |||
1702 | cejka | 29 | /** @addtogroup ppc32 |
30 | * @{ |
||
31 | */ |
||
32 | /** @file |
||
33 | */ |
||
34 | |||
342 | jermar | 35 | #ifndef __ppc32_ATOMIC_H__ |
36 | #define __ppc32_ATOMIC_H__ |
||
156 | decky | 37 | |
1001 | decky | 38 | static inline void atomic_inc(atomic_t *val) |
39 | { |
||
1107 | jermar | 40 | long tmp; |
156 | decky | 41 | |
1267 | decky | 42 | asm volatile ( |
990 | decky | 43 | "1:\n" |
44 | "lwarx %0, 0, %2\n" |
||
45 | "addic %0, %0, 1\n" |
||
46 | "stwcx. %0, 0, %2\n" |
||
47 | "bne- 1b" |
||
48 | : "=&r" (tmp), "=m" (val->count) |
||
49 | : "r" (&val->count), "m" (val->count) |
||
1267 | decky | 50 | : "cc" |
51 | ); |
||
156 | decky | 52 | } |
53 | |||
1001 | decky | 54 | static inline void atomic_dec(atomic_t *val) |
55 | { |
||
1107 | jermar | 56 | long tmp; |
990 | decky | 57 | |
1267 | decky | 58 | asm volatile ( |
990 | decky | 59 | "1:\n" |
60 | "lwarx %0, 0, %2\n" |
||
61 | "addic %0, %0, -1\n" |
||
62 | "stwcx. %0, 0, %2\n" |
||
63 | "bne- 1b" |
||
64 | : "=&r" (tmp), "=m" (val->count) |
||
65 | : "r" (&val->count), "m" (val->count) |
||
1267 | decky | 66 | : "cc" |
67 | ); |
||
156 | decky | 68 | } |
69 | |||
1104 | jermar | 70 | static inline long atomic_postinc(atomic_t *val) |
1001 | decky | 71 | { |
72 | atomic_inc(val); |
||
73 | return val->count - 1; |
||
74 | } |
||
75 | |||
1104 | jermar | 76 | static inline long atomic_postdec(atomic_t *val) |
1001 | decky | 77 | { |
78 | atomic_dec(val); |
||
79 | return val->count + 1; |
||
80 | } |
||
81 | |||
1104 | jermar | 82 | static inline long atomic_preinc(atomic_t *val) |
1001 | decky | 83 | { |
84 | atomic_inc(val); |
||
85 | return val->count; |
||
86 | } |
||
87 | |||
1104 | jermar | 88 | static inline long atomic_predec(atomic_t *val) |
1001 | decky | 89 | { |
90 | atomic_dec(val); |
||
91 | return val->count; |
||
92 | } |
||
93 | |||
156 | decky | 94 | #endif |
1702 | cejka | 95 | |
96 | /** @} |
||
97 | */ |
||
98 |