1/*	$NetBSD: membar_ops.S,v 1.7 2015/01/08 22:27:17 riastradh Exp $	*/
2
3/*-
4 * Copyright (c) 2006, 2007 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Jason R. Thorpe.
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 "atomic_op_asm.h"
33
34	.text
35
36#ifdef _KERNEL
37
38/*
39 * We start out with no-op versions that do nothing.  We hot-patch when
40 * we detect a MP system.
41 */
42LEAF(_membar_producer, 0)
43	RET
44	nop
45	END(_membar_producer)
46EXPORT(_membar_producer_end)
47
48LEAF(_membar_sync, 0)
49	RET
50	nop
51	END(_membar_sync)
52EXPORT(_membar_sync_end)
53
54LEAF(_membar_producer_mp, 0)
55	wmb
56	RET
57	END(_membar_producer_mp)
58EXPORT(_membar_producer_mp_end)
59
60LEAF(_membar_sync_mp, 0)
61	mb
62	RET
63	END(_membar_sync_mp)
64EXPORT(_membar_sync_mp_end)
65
66#else	/* _KERNEL */
67
68LEAF(_membar_producer, 0)
69	mb
70	RET
71	END(_membar_producer)
72EXPORT(_membar_producer_end)
73
74LEAF(_membar_sync, 0)
75	mb
76	RET
77	END(_membar_sync)
78EXPORT(_membar_sync_end)
79
80#endif	/* _KERNEL */
81
82ATOMIC_OP_ALIAS(membar_producer,_membar_producer)
83ATOMIC_OP_ALIAS(membar_sync,_membar_sync)
84ATOMIC_OP_ALIAS(membar_enter,_membar_sync)
85STRONG_ALIAS(_membar_enter,_membar_sync)
86ATOMIC_OP_ALIAS(membar_exit,_membar_sync)
87STRONG_ALIAS(_membar_exit,_membar_sync)
88ATOMIC_OP_ALIAS(membar_consumer,_membar_sync)
89STRONG_ALIAS(_membar_consumer,_membar_sync)
90ATOMIC_OP_ALIAS(membar_datadep_consumer,_membar_sync)
91STRONG_ALIAS(_membar_datadep_consumer,_membar_sync)
92