1 /* $NetBSD: atomic.h,v 1.4 2005/12/28 19:09:29 perry Exp $ */ 2 3 /* 4 * Copyright 2002 (c) Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Frank van der Linden for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #ifndef _ATOMIC_H 39 #define _ATOMIC_H 40 41 #ifndef _LOCORE 42 43 static __inline u_int64_t 44 x86_atomic_testset_u64(volatile u_int64_t *ptr, u_int64_t val) { 45 __asm volatile ("xchgq %0,(%2)" :"=r" (val):"0" (val),"r" (ptr)); 46 return val; 47 } 48 49 static __inline u_int32_t 50 x86_atomic_testset_u32(volatile u_int32_t *ptr, u_int32_t val) { 51 __asm volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr)); 52 return val; 53 } 54 55 56 57 static __inline int32_t 58 x86_atomic_testset_i32(volatile int32_t *ptr, int32_t val) { 59 __asm volatile ("xchgl %0,(%2)" :"=r" (val):"0" (val),"r" (ptr)); 60 return val; 61 } 62 63 64 65 static __inline void 66 x86_atomic_setbits_u32(volatile u_int32_t *ptr, u_int32_t bits) { 67 __asm volatile("lock ; orl %1,%0" : "=m" (*ptr) : "ir" (bits)); 68 } 69 70 static __inline void 71 x86_atomic_clearbits_u32(volatile u_int32_t *ptr, u_int32_t bits) { 72 __asm volatile("lock ; andl %1,%0" : "=m" (*ptr) : "ir" (~bits)); 73 } 74 75 76 77 static __inline void 78 x86_atomic_setbits_u64(volatile u_int64_t *ptr, u_int64_t bits) { 79 __asm volatile("lock ; orq %1,%0" : "=m" (*ptr) : "ir" (~bits)); 80 } 81 82 static __inline void 83 x86_atomic_clearbits_u64(volatile u_int64_t *ptr, u_int64_t bits) { 84 __asm volatile("lock ; andq %1,%0" : "=m" (*ptr) : "ir" (~bits)); 85 } 86 87 #define x86_atomic_testset_ul x86_atomic_testset_u32 88 #define x86_atomic_testset_i x86_atomic_testset_i32 89 #define x86_atomic_setbits_l x86_atomic_setbits_u32 90 #define x86_atomic_setbits_ul x86_atomic_setbits_u32 91 #define x86_atomic_clearbits_l x86_atomic_clearbits_u32 92 #define x86_atomic_clearbits_ul x86_atomic_clearbits_u32 93 94 #endif 95 #endif 96
