| atomic.h (88117) | atomic.h (90515) |
|---|---|
| 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 88117 2001-12-18 08:51:34Z jhb $ | 26 * $FreeBSD: head/sys/i386/include/atomic.h 90515 2002-02-11 03:41:59Z bde $ |
| 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 * --- 40 unchanged lines hidden (view full) --- 75 76#else /* !KLD_MODULE */ 77 78/* 79 * For userland, assume the SMP case and use lock prefixes so that 80 * the binaries will run on both types of systems. 81 */ 82#if defined(SMP) || !defined(_KERNEL) | 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 * --- 40 unchanged lines hidden (view full) --- 75 76#else /* !KLD_MODULE */ 77 78/* 79 * For userland, assume the SMP case and use lock prefixes so that 80 * the binaries will run on both types of systems. 81 */ 82#if defined(SMP) || !defined(_KERNEL) |
| 83#if defined(LOCORE) 84#define MPLOCKED lock ; 85#else /* !LOCORE */ | |
| 86#define MPLOCKED "lock ; " | 83#define MPLOCKED "lock ; " |
| 87#endif /* LOCORE */ 88#else /* SMP || !_KERNEL */ | 84#else |
| 89#define MPLOCKED | 85#define MPLOCKED |
| 90#endif /* SMP || !_KERNEL */ | 86#endif |
| 91 | 87 |
| 92#if !defined(LOCORE) | |
| 93/* 94 * The assembly is volatilized to demark potential before-and-after side 95 * effects if an interrupt or SMP collision were to occur. 96 */ 97#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \ 98static __inline void \ 99atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 100{ \ --- 99 unchanged lines hidden (view full) --- 200atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 201{ \ 202 __asm __volatile(SOP \ 203 : "+m" (*p), /* 0 */ \ 204 "+r" (v) /* 1 */ \ 205 : : "memory"); \ 206} 207#endif /* defined(I386_CPU) */ | 88/* 89 * The assembly is volatilized to demark potential before-and-after side 90 * effects if an interrupt or SMP collision were to occur. 91 */ 92#define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \ 93static __inline void \ 94atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 95{ \ --- 99 unchanged lines hidden (view full) --- 195atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 196{ \ 197 __asm __volatile(SOP \ 198 : "+m" (*p), /* 0 */ \ 199 "+r" (v) /* 1 */ \ 200 : : "memory"); \ 201} 202#endif /* defined(I386_CPU) */ |
| 208#endif /* !defined(LOCORE) */ | |
| 209#endif /* KLD_MODULE */ 210 | 203#endif /* KLD_MODULE */ 204 |
| 211#if !defined(LOCORE) | |
| 212ATOMIC_ASM(set, char, "orb %b1,%0", "iq", v) 213ATOMIC_ASM(clear, char, "andb %b1,%0", "iq", ~v) 214ATOMIC_ASM(add, char, "addb %b1,%0", "iq", v) 215ATOMIC_ASM(subtract, char, "subb %b1,%0", "iq", v) 216 217ATOMIC_ASM(set, short, "orw %w1,%0", "ir", v) 218ATOMIC_ASM(clear, short, "andw %w1,%0", "ir", ~v) 219ATOMIC_ASM(add, short, "addw %w1,%0", "ir", v) --- 182 unchanged lines hidden (view full) --- 402 " xchgl %1,%0 ; " 403 "# atomic_readandclear_int" 404 : "=&r" (result) /* 0 (result) */ 405 : "m" (*addr)); /* 1 (addr) */ 406 407 return (result); 408} 409#endif /* !defined(WANT_FUNCTIONS) */ | 205ATOMIC_ASM(set, char, "orb %b1,%0", "iq", v) 206ATOMIC_ASM(clear, char, "andb %b1,%0", "iq", ~v) 207ATOMIC_ASM(add, char, "addb %b1,%0", "iq", v) 208ATOMIC_ASM(subtract, char, "subb %b1,%0", "iq", v) 209 210ATOMIC_ASM(set, short, "orw %w1,%0", "ir", v) 211ATOMIC_ASM(clear, short, "andw %w1,%0", "ir", ~v) 212ATOMIC_ASM(add, short, "addw %w1,%0", "ir", v) --- 182 unchanged lines hidden (view full) --- 395 " xchgl %1,%0 ; " 396 "# atomic_readandclear_int" 397 : "=&r" (result) /* 0 (result) */ 398 : "m" (*addr)); /* 1 (addr) */ 399 400 return (result); 401} 402#endif /* !defined(WANT_FUNCTIONS) */ |
| 410#endif /* !defined(LOCORE) */ | |
| 411#endif /* ! _MACHINE_ATOMIC_H_ */ | 403#endif /* ! _MACHINE_ATOMIC_H_ */ |