/* $NetBSD: mutex.h,v 1.6.26.1 2023/08/09 17:42:01 martin Exp $ */ /*- * Copyright (c) 2002, 2007 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jason R. Thorpe and Andrew Doran. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #ifndef _POWERPC_MUTEX_H_ #define _POWERPC_MUTEX_H_ #include #ifdef __MUTEX_PRIVATE #include #include #endif struct kmutex { union { #ifdef __MUTEX_PRIVATE struct { volatile uintptr_t mtxm_owner; ipl_cookie_t mtxm_ipl; __cpu_simple_lock_t mtxm_lock; } m; #endif struct { uintptr_t mtxp_a; uint32_t mtxp_b[2]; } p; } u; }; #ifdef __MUTEX_PRIVATE #define mtx_owner u.m.mtxm_owner #define mtx_ipl u.m.mtxm_ipl #define mtx_lock u.m.mtxm_lock #define __HAVE_SIMPLE_MUTEXES 1 #define __HAVE_MUTEX_STUBS 1 #define MUTEX_CAS(p, o, n) _lock_cas((p), (o), (n)) int _lock_cas(volatile uintptr_t *, uintptr_t, uintptr_t); #endif /* __MUTEX_PRIVATE */ #endif /* _POWERPC_MUTEX_H_ */