11.13Sriastrad/* $NetBSD: mutex.h,v 1.13 2023/07/12 12:50:13 riastradh Exp $ */ 21.2Sad 31.2Sad/*- 41.8Sad * Copyright (c) 2002, 2006 The NetBSD Foundation, Inc. 51.2Sad * All rights reserved. 61.2Sad * 71.2Sad * This code is derived from software contributed to The NetBSD Foundation 81.2Sad * by Jason R. Thorpe and Andrew Doran. 91.2Sad * 101.2Sad * Redistribution and use in source and binary forms, with or without 111.2Sad * modification, are permitted provided that the following conditions 121.2Sad * are met: 131.2Sad * 1. Redistributions of source code must retain the above copyright 141.2Sad * notice, this list of conditions and the following disclaimer. 151.2Sad * 2. Redistributions in binary form must reproduce the above copyright 161.2Sad * notice, this list of conditions and the following disclaimer in the 171.2Sad * documentation and/or other materials provided with the distribution. 181.2Sad * 191.2Sad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 201.2Sad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 211.2Sad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 221.2Sad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 231.2Sad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 241.2Sad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 251.2Sad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 261.2Sad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 271.2Sad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 281.2Sad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 291.2Sad * POSSIBILITY OF SUCH DAMAGE. 301.2Sad */ 311.2Sad 321.2Sad#ifndef _SPARC_MUTEX_H_ 331.2Sad#define _SPARC_MUTEX_H_ 341.2Sad 351.13Sriastrad#include <sys/types.h> 361.13Sriastrad 371.9Smartin#ifdef __MUTEX_PRIVATE 381.12Sriastrad#include <machine/intr.h> 391.12Sriastrad 401.9Smartin#include "psl.h" 411.9Smartin#endif 421.9Smartin 431.2Sadstruct kmutex { 441.8Sad union { 451.8Sad volatile uintptr_t mtxa_owner; 461.8Sad#ifdef __MUTEX_PRIVATE 471.8Sad struct { 481.8Sad volatile uint8_t mtxs_dummy; 491.8Sad ipl_cookie_t mtxs_ipl; 501.8Sad __cpu_simple_lock_t mtxs_lock; 511.8Sad volatile uint8_t mtxs_unused; 521.8Sad } s; 531.8Sad#endif 541.8Sad } u; 551.2Sad}; 561.2Sad 571.8Sad#ifdef __MUTEX_PRIVATE 581.2Sad 591.8Sad#define mtx_owner u.mtxa_owner 601.8Sad#define mtx_ipl u.s.mtxs_ipl 611.8Sad#define mtx_lock u.s.mtxs_lock 621.7Sad 631.8Sad#define __HAVE_SIMPLE_MUTEXES 1 641.2Sad 651.8Sad#define MUTEX_CAS(p, o, n) \ 661.8Sad (_atomic_cas_ulong((volatile unsigned long *)(p), (o), (n)) == (o)) 671.2Sad 681.8Sadunsigned long _atomic_cas_ulong(volatile unsigned long *, 691.8Sad unsigned long, unsigned long); 701.3Sad 711.2Sad#endif /* __MUTEX_PRIVATE */ 721.2Sad 731.2Sad#endif /* _SPARC_MUTEX_H_ */ 74