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/* $NetBSD: alpha_mmclock_gettime.c,v 1.1 1995/12/20 12:54:24 cgd Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Chris G. Demetriou
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
#include <sys/types.h>
#include <sys/fcntl.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <machine/sysarch.h>
#include "libalpha.h"
void
alpha_mmclock_gettime(tdp)
struct alpha_timedata *tdp;
{
u_long npcc, pccdiff;
do {
tdp->td_tv.tv_usec = alpha_mmclockdata->td_tv.tv_usec;
tdp->td_tv.tv_sec = alpha_mmclockdata->td_tv.tv_sec;
tdp->td_cc = alpha_mmclockdata->td_cc;
} while (tdp->td_tv.tv_usec != alpha_mmclockdata->td_tv.tv_usec ||
tdp->td_tv.tv_sec != alpha_mmclockdata->td_tv.tv_sec);
npcc = rpcc() & 0x00000000ffffffffUL;
if (npcc < tdp->td_cc)
npcc += 0x0000000100000000UL;
tdp->td_cc = npcc - tdp->td_cc;
}
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