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
27	.ident	"%Z%%M%	%I%	%E% SMI"
28
29#include <sys/asm_linkage.h>
30	.file		"i386_locks.s"
31	ENTRY(tnfw_b_get_lock)
32#if defined (__amd64)
33	/* XX64 - fix me */
34#else
35	movl	4(%esp), %edx
36	subl	%eax, %eax
37	lock
38	btsl	$0, (%edx)
39	jnc	.L1
40	incl	%eax
41.L1:
42#endif
43	ret
44
45	ENTRY(tnfw_b_clear_lock)
46#if defined (__amd64)
47	/* XX64 - fix me */
48#else
49	movl	4(%esp), %eax
50	movb	$0, (%eax)
51#endif
52	ret
53
54	ENTRY(tnfw_b_atomic_swap)
55#if defined (__amd64)
56	/* XX64 - fix me */
57#else
58	movl	4(%esp), %edx
59	movl	8(%esp), %eax
60	xchgl	%eax, (%edx)
61#endif
62	ret
63