getsecs.c revision 1.6 
1/*	$NetBSD: getsecs.c,v 1.6 2002/11/09 06:34:38 thorpej Exp $	*/
2
3#include <sys/param.h>
4
5#include <netinet/in.h>
6#include <netinet/in_systm.h>
7
8#include <lib/libsa/stand.h>
9#include <lib/libsa/net.h>
10
11#include "include/prom.h"
12#include "include/rpb.h"
13
14int
15getsecs(void)
16{
17	static long tnsec;
18	static long lastpcc, wrapsecs;
19	long curpcc;
20
21	if (tnsec == 0) {
22		tnsec = 1;
23		lastpcc = alpha_rpcc() & 0xffffffff;
24		wrapsecs = (0xffffffff /
25		    ((struct rpb *)HWRPB_ADDR)->rpb_cc_freq) + 1;
26
27#if 0
28		printf("getsecs: cc freq = %d, time to wrap = %d\n",
29		    ((struct rpb *)HWRPB_ADDR)->rpb_cc_freq, wrapsecs);
30#endif
31	}
32
33	curpcc = alpha_rpcc() & 0xffffffff;
34	if (curpcc < lastpcc)
35		curpcc += 0x100000000;
36
37	tnsec += ((curpcc - lastpcc) * 1000000000) / ((struct rpb *)HWRPB_ADDR)->rpb_cc_freq;
38	lastpcc = curpcc;
39
40	return (tnsec / 1000000000);
41}
42