| atomic.h (137623) | atomic.h (137784) |
|---|---|
| 1/*- 2 * Copyright (c) 1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * | 1/*- 2 * Copyright (c) 1998 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 9 unchanged lines hidden (view full) --- 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * |
| 26 * $FreeBSD: head/sys/i386/include/atomic.h 137623 2004-11-12 19:18:46Z jhb $ | 26 * $FreeBSD: head/sys/i386/include/atomic.h 137784 2004-11-16 20:42:32Z jhb $ |
| 27 */ 28#ifndef _MACHINE_ATOMIC_H_ 29#define _MACHINE_ATOMIC_H_ 30 31/* 32 * Various simple arithmetic on memory which is atomic in the presence 33 * of interrupts and multiple processors. 34 * --- 78 unchanged lines hidden (view full) --- 113 * 114 * if (*dst == exp) *dst = src (all 32 bit words) 115 * 116 * Returns 0 on failure, non-zero on success 117 */ 118 119#if defined(__GNUC__) || defined(__INTEL_COMPILER) 120 | 27 */ 28#ifndef _MACHINE_ATOMIC_H_ 29#define _MACHINE_ATOMIC_H_ 30 31/* 32 * Various simple arithmetic on memory which is atomic in the presence 33 * of interrupts and multiple processors. 34 * --- 78 unchanged lines hidden (view full) --- 113 * 114 * if (*dst == exp) *dst = src (all 32 bit words) 115 * 116 * Returns 0 on failure, non-zero on success 117 */ 118 119#if defined(__GNUC__) || defined(__INTEL_COMPILER) 120 |
| 121#if defined(I386_CPU) || defined(CPU_DISABLE_CMPXCHG) | 121#if defined(CPU_DISABLE_CMPXCHG) |
| 122 123static __inline int 124atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) 125{ 126 int res = exp; 127 128 __asm __volatile( 129 " pushfl ; " --- 9 unchanged lines hidden (view full) --- 139 : "+a" (res) /* 0 (result) */ 140 : "r" (src), /* 1 */ 141 "m" (*(dst)) /* 2 */ 142 : "memory"); 143 144 return (res); 145} 146 | 122 123static __inline int 124atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) 125{ 126 int res = exp; 127 128 __asm __volatile( 129 " pushfl ; " --- 9 unchanged lines hidden (view full) --- 139 : "+a" (res) /* 0 (result) */ 140 : "r" (src), /* 1 */ 141 "m" (*(dst)) /* 2 */ 142 : "memory"); 143 144 return (res); 145} 146 |
| 147#else /* defined(I386_CPU) */ | 147#else /* defined(CPU_DISABLE_CMPXCHG) */ |
| 148 149static __inline int 150atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) 151{ 152 int res = exp; 153 154 __asm __volatile ( 155 " " __XSTRING(MPLOCKED) " " --- 5 unchanged lines hidden (view full) --- 161 : "+a" (res) /* 0 (result) */ 162 : "r" (src), /* 1 */ 163 "m" (*(dst)) /* 2 */ 164 : "memory"); 165 166 return (res); 167} 168 | 148 149static __inline int 150atomic_cmpset_int(volatile u_int *dst, u_int exp, u_int src) 151{ 152 int res = exp; 153 154 __asm __volatile ( 155 " " __XSTRING(MPLOCKED) " " --- 5 unchanged lines hidden (view full) --- 161 : "+a" (res) /* 0 (result) */ 162 : "r" (src), /* 1 */ 163 "m" (*(dst)) /* 2 */ 164 : "memory"); 165 166 return (res); 167} 168 |
| 169#endif /* defined(I386_CPU) */ | 169#endif /* defined(CPU_DISABLE_CMPXCHG) */ |
| 170 171#endif /* defined(__GNUC__) || defined(__INTEL_COMPILER) */ 172 173#if defined(__GNUC__) || defined(__INTEL_COMPILER) 174 175#if defined(_KERNEL) && !defined(SMP) 176 177/* --- 276 unchanged lines hidden --- | 170 171#endif /* defined(__GNUC__) || defined(__INTEL_COMPILER) */ 172 173#if defined(__GNUC__) || defined(__INTEL_COMPILER) 174 175#if defined(_KERNEL) && !defined(SMP) 176 177/* --- 276 unchanged lines hidden --- |