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ras1.c revision 1.5 
      1 /* $NetBSD: ras1.c,v 1.5 2004/01/18 16:47:06 martin Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by the NetBSD
     18  *      Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #include <errno.h>
     37 #include <stdio.h>
     38 #include <signal.h>
     39 #include <sys/ras.h>
     40 #include <sys/time.h>
     41 
     42 #define COUNT	10
     43 
     44 __volatile int handled = 0;
     45 __volatile int count = 0;
     46 struct itimerval itv;
     47 
     48 void handler(int);
     49 
     50 void
     51 handler(int sig)
     52 {
     53 
     54 	handled++;
     55 }
     56 
     57 int
     58 main(void)
     59 {
     60 
     61         signal(SIGVTALRM, handler);
     62 
     63         itv.it_interval.tv_sec = 0;
     64         itv.it_interval.tv_usec = 0;
     65         itv.it_value.tv_sec = 10;
     66         itv.it_value.tv_usec = 0;
     67         setitimer(ITIMER_VIRTUAL, &itv, NULL);
     68 
     69 	if (rasctl((caddr_t)&&start, (caddr_t)&&end - (caddr_t)&&start,
     70 	    RAS_INSTALL) < 0) {
     71 		if (errno == EOPNOTSUPP) {
     72 			printf("RAS is not supported on this architecture\n");
     73 			return 0;
     74 		}
     75 		return (1);
     76 	}
     77 
     78 	__insn_barrier();
     79 start:
     80 	count++;
     81 	if (count > COUNT)
     82 		goto end;
     83 
     84 	while (!handled) {
     85 		continue;
     86 	}
     87 end:
     88 	__insn_barrier();
     89 
     90 	return (handled != 0);
     91 }
     92