1 /* $NetBSD: _context_u.S,v 1.4 2008/08/11 21:45:24 skrll Exp $ */
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
32 #include <machine/asm.h>
34 LEAF_ENTRY(pthread__ras_simple_lock_init)
35 ldi 1,%ret0 /* 1 == unlocked */
41 EXIT(pthread__ras_simple_lock_init)
43 .global pthread__lock_ras_start
44 .global pthread__lock_ras_end
46 LEAF_ENTRY(pthread__ras_simple_lock_try)
50 pthread__lock_ras_start:
52 stw %r0,0(%arg0) /* 0 == locked */
53 pthread__lock_ras_end:
55 comiclr,= 0,%ret0,%ret0 /* if locked return 0 */
56 ldi 1,%ret0 /* else return 1 */
58 EXIT(pthread__ras_simple_lock_try)
61 LEAF_ENTRY(pthread__ras_simple_unlock)
64 ldi 1,%ret0 /* 1 == unlocked */
67 EXIT(pthread__ras_simple_unlock)