96 lines
3.4 KiB
C
96 lines
3.4 KiB
C
/* $NetBSD: atomic.h,v 1.1 2003/04/26 18:39:37 fvdl Exp $ */
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/*
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* Copyright 2002 (c) Wasabi Systems, Inc.
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* All rights reserved.
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*
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* Written by Frank van der Linden for Wasabi Systems, Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the NetBSD Project by
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* Wasabi Systems, Inc.
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* 4. The name of Wasabi Systems, Inc. may not be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _ATOMIC_H
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#define _ATOMIC_H
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#ifndef _LOCORE
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static __inline u_int64_t
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x86_atomic_testset_u64(volatile u_int64_t *ptr, u_int64_t val) {
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__asm__ volatile ("xchgq %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
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return val;
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}
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static __inline u_int32_t
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x86_atomic_testset_u32(volatile u_int32_t *ptr, u_int32_t val) {
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__asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
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return val;
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}
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static __inline int32_t
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x86_atomic_testset_i32(volatile int32_t *ptr, int32_t val) {
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__asm__ volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr));
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return val;
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}
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static __inline void
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x86_atomic_setbits_u32(volatile u_int32_t *ptr, u_int32_t bits) {
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__asm __volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits));
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}
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static __inline void
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x86_atomic_clearbits_u32(volatile u_int32_t *ptr, u_int32_t bits) {
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__asm __volatile("lock ; andl %1,%0" : "=m" (*ptr) : "ir" (~bits));
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}
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static __inline void
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x86_atomic_setbits_u64(volatile u_int64_t *ptr, u_int64_t bits) {
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__asm __volatile("lock ; orq %1,%0" : "=m" (*ptr) : "ir" (~bits));
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}
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static __inline void
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x86_atomic_clearbits_u64(volatile u_int64_t *ptr, u_int64_t bits) {
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__asm __volatile("lock ; andq %1,%0" : "=m" (*ptr) : "ir" (~bits));
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}
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#define x86_atomic_testset_ul x86_atomic_testset_u32
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#define x86_atomic_testset_i x86_atomic_testset_i32
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#define x86_atomic_setbits_l x86_atomic_setbits_u32
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#define x86_atomic_setbits_ul x86_atomic_setbits_u32
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#define x86_atomic_clearbits_l x86_atomic_clearbits_u32
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#define x86_atomic_clearbits_ul x86_atomic_clearbits_u32
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#endif
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#endif
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