Annotation of sys/arch/sparc64/include/atomic.h, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: atomic.h,v 1.3 2007/03/13 08:34:03 art Exp $ */
! 2: /*
! 3: * Copyright (c) 2007 Artur Grabowski <art@openbsd.org>
! 4: *
! 5: * Permission to use, copy, modify, and distribute this software for any
! 6: * purpose with or without fee is hereby granted, provided that the above
! 7: * copyright notice and this permission notice appear in all copies.
! 8: *
! 9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
! 10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
! 11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
! 12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
! 13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
! 14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
! 15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
! 16: */
! 17:
! 18: #ifndef _SPARC64_ATOMIC_H_
! 19: #define _SPARC64_ATOMIC_H_
! 20:
! 21: #if defined(_KERNEL)
! 22:
! 23: static __inline unsigned int
! 24: sparc64_casa(volatile unsigned int *uip, unsigned int expect, unsigned int new)
! 25: {
! 26: __asm __volatile("casa [%2] %3, %4, %0"
! 27: : "+r" (new), "=m" (*uip)
! 28: : "r" (uip), "n" (ASI_N), "r" (expect), "m" (*uip));
! 29:
! 30: return (new);
! 31: }
! 32:
! 33: static __inline void
! 34: atomic_setbits_int(volatile unsigned int *uip, unsigned int v)
! 35: {
! 36: volatile unsigned int e, r;
! 37:
! 38: r = *uip;
! 39: do {
! 40: e = r;
! 41: r = sparc64_casa(uip, e, e | v);
! 42: } while (r != e);
! 43: }
! 44:
! 45: static __inline void
! 46: atomic_clearbits_int(volatile unsigned int *uip, unsigned int v)
! 47: {
! 48: volatile unsigned int e, r;
! 49:
! 50: r = *uip;
! 51: do {
! 52: e = r;
! 53: r = sparc64_casa(uip, e, e & ~v);
! 54: } while (r != e);
! 55: }
! 56:
! 57: #endif /* defined(_KERNEL) */
! 58: #endif /* _SPARC64_ATOMIC_H_ */
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