Rev 1400 | Rev 1964 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed
Rev | Author | Line No. | Line |
---|---|---|---|
1400 | decky | 1 | /* |
2 | * Copyright (C) 2006 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 | |||
1656 | cejka | 29 | /** @addtogroup libcppc64 |
30 | * @{ |
||
31 | */ |
||
32 | /** @file |
||
33 | */ |
||
34 | |||
1400 | decky | 35 | #ifndef __ppc64_ATOMIC_H__ |
36 | #define __ppc64_ATOMIC_H__ |
||
37 | |||
38 | static inline void atomic_inc(atomic_t *val) |
||
39 | { |
||
40 | long tmp; |
||
41 | |||
42 | asm __volatile__ ( |
||
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) |
||
50 | : "cc"); |
||
51 | } |
||
52 | |||
53 | static inline void atomic_dec(atomic_t *val) |
||
54 | { |
||
55 | long tmp; |
||
56 | |||
57 | asm __volatile__( |
||
58 | "1:\n" |
||
59 | "lwarx %0, 0, %2\n" |
||
60 | "addic %0, %0, -1\n" |
||
61 | "stwcx. %0, 0, %2\n" |
||
62 | "bne- 1b" |
||
63 | : "=&r" (tmp), "=m" (val->count) |
||
64 | : "r" (&val->count), "m" (val->count) |
||
65 | : "cc"); |
||
66 | } |
||
67 | |||
68 | static inline long atomic_postinc(atomic_t *val) |
||
69 | { |
||
70 | atomic_inc(val); |
||
71 | return val->count - 1; |
||
72 | } |
||
73 | |||
74 | static inline long atomic_postdec(atomic_t *val) |
||
75 | { |
||
76 | atomic_dec(val); |
||
77 | return val->count + 1; |
||
78 | } |
||
79 | |||
80 | static inline long atomic_preinc(atomic_t *val) |
||
81 | { |
||
82 | atomic_inc(val); |
||
83 | return val->count; |
||
84 | } |
||
85 | |||
86 | static inline long atomic_predec(atomic_t *val) |
||
87 | { |
||
88 | atomic_dec(val); |
||
89 | return val->count; |
||
90 | } |
||
91 | |||
92 | #endif |
||
1656 | cejka | 93 | |
94 | /** @} |
||
95 | */ |
||
96 |