1/*        $NetBSD: pthread_md.S,v 1.2 2022/05/19 07:10:15 skrll Exp $ */
2
3/*
4 * Copyright (c) 2001 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Wayne Knowles
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
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.
18 *
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.
30 */
31
32#include <sys/ras.h>
33#include <machine/asm.h>
34
35LEAF_ENTRY(pthread__ras_simple_lock_init)
36          ldi       1,%ret0                       /* 1 == unlocked */
37          stw       %ret0,0(%arg0)
38          stw       %ret0,4(%arg0)
39          stw       %ret0,8(%arg0)
40          stw       %ret0,12(%arg0)
41          bv,n      %r0(%rp)
42EXIT(pthread__ras_simple_lock_init)
43
44          .global pthread__lock_ras_start
45          .global pthread__lock_ras_end
46
47LEAF_ENTRY(pthread__ras_simple_lock_try)
48          ldo       15(%arg0),%arg0
49          depi      0,31,4,%arg0
50
51RAS_START_ASM_HIDDEN(pthread__lock)
52          ldw       0(%arg0),%ret0
53          stw       %r0,0(%arg0)                  /* 0 == locked */
54RAS_END_ASM_HIDDEN(pthread__lock)
55
56          comiclr,= 0,%ret0,%ret0                 /* if locked return 0 */
57          ldi       1,%ret0                       /* else return 1 */
58          bv,n      %r0(%rp)
59EXIT(pthread__ras_simple_lock_try)
60
61
62LEAF_ENTRY(pthread__ras_simple_unlock)
63          ldo       15(%arg0),%arg0
64          depi      0,31,4,%arg0
65          ldi       1,%ret0                       /* 1 == unlocked */
66          bv        %r0(%rp)
67          stw       %ret0,0(%arg0)
68EXIT(pthread__ras_simple_unlock)
69