xref: /illumos-gate/usr/src/uts/intel/asm/htable.h (revision 74ecdb5171c9f3673b9393b1a3dc6f3a65e93895)
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 2004 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  *
26  * Copyright 2018 Joyent, Inc.
27  */
28 
29 #ifndef _ASM_HTABLE_H
30 #define	_ASM_HTABLE_H
31 
32 #include <sys/ccompile.h>
33 #include <sys/types.h>
34 
35 #ifdef	__cplusplus
36 extern "C" {
37 #endif
38 
39 #if !defined(__lint) && defined(__GNUC__)
40 
41 /*
42  * This set of atomic operations are designed primarily
43  * for some ia32 hat layer operations.
44  */
45 
46 extern __GNU_INLINE void
atomic_orb(uint8_t * addr,uint8_t value)47 atomic_orb(uint8_t *addr, uint8_t value)
48 {
49 	__asm__ __volatile__(
50 	    "lock; orb %%dl,%0"
51 	    : "=m" (*addr)
52 	    : "d" (value), "m" (*addr)
53 	    : "cc");
54 }
55 
56 extern __GNU_INLINE void
atomic_andb(uint8_t * addr,uint8_t value)57 atomic_andb(uint8_t *addr, uint8_t value)
58 {
59 	__asm__ __volatile__(
60 	    "lock; andb %%dl,%0"
61 	    : "=m" (*addr)
62 	    : "d" (value), "m" (*addr)
63 	    : "cc");
64 }
65 
66 extern __GNU_INLINE void
atomic_inc16(uint16_t * addr)67 atomic_inc16(uint16_t *addr)
68 {
69 	__asm__ __volatile__(
70 	    "lock; incw %0"
71 	    : "=m" (*addr)
72 	    : "m" (*addr)
73 	    : "cc");
74 }
75 
76 extern __GNU_INLINE void
atomic_dec16(uint16_t * addr)77 atomic_dec16(uint16_t *addr)
78 {
79 	__asm__ __volatile__(
80 	    "lock; decw %0"
81 	    : "=m" (*addr)
82 	    : "m" (*addr)
83 	    : "cc");
84 }
85 
86 #endif	/* !__lint && __GNUC__ */
87 
88 #ifdef	__cplusplus
89 }
90 #endif
91 
92 #endif	/* _ASM_HTABLE_H */
93