/* $NetBSD: clock.c,v 1.2 2008/01/07 17:27:12 joerg Exp $ */ /*- * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Jared D. McNeill. * 4. Neither the name of The NetBSD Foundation nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include <sys/cdefs.h> __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.2 2008/01/07 17:27:12 joerg Exp $"); #include <sys/param.h> #include <sys/proc.h> #include <sys/user.h> #include <sys/systm.h> #include <sys/device.h> #include <sys/timetc.h> #include <machine/mainbus.h> static int clock_match(device_t, cfdata_t, void *); static void clock_attach(device_t, device_t, void *); static void clock_intr(int); static u_int clock_getcounter(struct timecounter *); typedef struct clock_softc { device_t sc_dev; } clock_softc_t; extern int setitimer(int, const struct itimerval *, struct itimerval *); static struct timecounter clock_timecounter = { clock_getcounter, /* get_timecount */ 0, /* no poll_pps */ ~0u, /* counter_mask */ 1000000, /* frequency */ "gettimeofday", /* name */ 100, /* quality */ NULL, /* prev */ NULL, /* next */ }; CFATTACH_DECL_NEW(clock, sizeof(clock_softc_t), clock_match, clock_attach, NULL, NULL); static int clock_match(device_t parent, cfdata_t match, void *opaque) { struct thunkbus_attach_args *taa = opaque; if (taa->taa_type != THUNKBUS_TYPE_CLOCK) return 0; return 1; } static void clock_attach(device_t parent, device_t self, void *opaque) { clock_softc_t *sc = device_private(self); struct itimerval itimer; aprint_naive("\n"); aprint_normal("\n"); sc->sc_dev = self; (void)signal(SIGALRM, clock_intr); itimer.it_interval.tv_sec = 0; itimer.it_interval.tv_usec = 10000; itimer.it_value = itimer.it_interval; (void)setitimer(ITIMER_REAL, &itimer, NULL); tc_init(&clock_timecounter); } static void clock_intr(int notused) { extern int usermode_x; struct clockframe cf; #if notyet /* XXXJDM */ if (usermode_x > IPL_SOFTCLOCK) return; #endif hardclock(&cf); } static u_int clock_getcounter(struct timecounter *tc) { extern int gettimeofday(struct timeval *, void *); struct timeval tv; gettimeofday(&tv, NULL); return tv.tv_sec * 1000000 + tv.tv_usec; }