1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License"). You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #ifndef _ASM_ATOMIC_H
28 #define _ASM_ATOMIC_H
29
30 #pragma ident "%Z%%M% %I% %E% SMI"
31
32 #include <sys/types.h>
33
34 #ifdef __cplusplus
35 extern "C" {
36 #endif
37
38 #if !defined(__lint) && defined(__GNUC__)
39
40 #if defined(__amd64)
41
atomic_or_long(ulong_t * target,ulong_t bits)42 extern __inline__ void atomic_or_long(ulong_t *target, ulong_t bits)
43 {
44 __asm__ __volatile__(
45 "lock; orq %1, (%0)"
46 : /* no output */
47 : "r" (target), "r" (bits));
48 }
49
atomic_and_long(ulong_t * target,ulong_t bits)50 extern __inline__ void atomic_and_long(ulong_t *target, ulong_t bits)
51 {
52 __asm__ __volatile__(
53 "lock; andq %1, (%0)"
54 : /* no output */
55 : "r" (target), "r" (bits));
56 }
57
58 #ifdef notdef
cas64(uint64_t * target,uint64_t cmp,uint64_t newval)59 extern __inline__ uint64_t cas64(uint64_t *target, uint64_t cmp,
60 uint64_t newval)
61 {
62 uint64_t retval;
63
64 __asm__ __volatile__(
65 "movq %2, %%rax; lock; cmpxchgq %3, (%1)"
66 : "=a" (retval)
67 : "r" (target), "r" (cmp), "r" (newval));
68 return (retval);
69 }
70 #endif
71
72 #elif defined(__i386)
73
74 extern __inline__ void atomic_or_long(ulong_t *target, ulong_t bits)
75 {
76 __asm__ __volatile__(
77 "lock; orl %1, (%0)"
78 : /* no output */
79 : "r" (target), "r" (bits));
80 }
81
82 extern __inline__ void atomic_and_long(ulong_t *target, ulong_t bits)
83 {
84 __asm__ __volatile__(
85 "lock; andl %1, (%0)"
86 : /* no output */
87 : "r" (target), "r" (bits));
88 }
89
90 #else
91 #error "port me"
92 #endif
93
94 #endif /* !__lint && __GNUC__ */
95
96 #ifdef __cplusplus
97 }
98 #endif
99
100 #endif /* _ASM_ATOMIC_H */
101