/* $OpenBSD: atomic.h,v 1.2 2004/06/13 21:49:16 niklas Exp $ */ /* $NetBSD: atomic.h,v 1.1.2.2 2000/02/21 18:54:07 sommerfeld Exp $ */ /*- * Copyright (c) 2000 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by RedBack Networks Inc. * * Author: Bill Sommerfeld * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the NetBSD * Foundation, Inc. and its contributors. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * 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 _ATOMIC_H_ #define _ATOMIC_H_ #ifndef _LOCORE static __inline u_int32_t i386_atomic_testset_ul (volatile u_int32_t *ptr, unsigned long val) { __asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr)); return val; } static __inline int i386_atomic_testset_i (volatile int *ptr, unsigned long val) { __asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr)); return val; } static __inline void i386_atomic_setbits_l (volatile u_int32_t *ptr, unsigned long bits) { __asm __volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits)); } static __inline void i386_atomic_clearbits_l (volatile u_int32_t *ptr, unsigned long bits) { bits = ~bits; __asm __volatile("lock ; and %1,%0" : "=m" (*ptr) : "ir" (bits)); } #endif #endif