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Annotation of sys/arch/sparc64/include/atomic.h, Revision 1.1.1.1

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_ */