1/*	$NetBSD: mutex.h,v 1.6.26.1 2023/08/09 17:42:01 martin Exp $	*/
 2
 3/*-
 4 * Copyright (c) 2002, 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 and Andrew Doran.
 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#ifndef _POWERPC_MUTEX_H_
33#define	_POWERPC_MUTEX_H_
34
35#include <sys/types.h>
36
37#ifdef __MUTEX_PRIVATE
38#include <sys/intr.h>
39#include <machine/intr.h>
40#endif
41
42struct kmutex {
43	union {
44#ifdef __MUTEX_PRIVATE
45		struct {
46			volatile uintptr_t	mtxm_owner;
47			ipl_cookie_t		mtxm_ipl;
48			__cpu_simple_lock_t	mtxm_lock;
49		} m;
50#endif
51		struct {
52			uintptr_t		mtxp_a;
53			uint32_t		mtxp_b[2];
54		} p;
55	} u;
56};
57
58#ifdef __MUTEX_PRIVATE
59
60#define	mtx_owner	u.m.mtxm_owner
61#define	mtx_ipl		u.m.mtxm_ipl
62#define	mtx_lock	u.m.mtxm_lock
63
64#define	__HAVE_SIMPLE_MUTEXES		1
65#define	__HAVE_MUTEX_STUBS		1
66
67#define	MUTEX_CAS(p, o, n)		_lock_cas((p), (o), (n))
68
69int	_lock_cas(volatile uintptr_t *, uintptr_t, uintptr_t);
70
71#endif	/* __MUTEX_PRIVATE */
72
73#endif /* _POWERPC_MUTEX_H_ */