xref: /titanic_44/usr/src/uts/intel/asm/atomic.h (revision 3f7d54a6b84904c8f4d8daa4c7b577bede7df8b9)
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 
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 
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
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