xref: /netbsd-src/sys/arch/usermode/dev/clock.c (revision 482eef70502290f7cbd2cb9a24a4f41e6bacd98d)
1*482eef70Srin /* $NetBSD: clock.c,v 1.27 2020/05/29 12:30:41 rin Exp $ */
238365ca3Sjmcneill 
338365ca3Sjmcneill /*-
438365ca3Sjmcneill  * Copyright (c) 2007 Jared D. McNeill <jmcneill@invisible.ca>
538365ca3Sjmcneill  * All rights reserved.
638365ca3Sjmcneill  *
738365ca3Sjmcneill  * Redistribution and use in source and binary forms, with or without
838365ca3Sjmcneill  * modification, are permitted provided that the following conditions
938365ca3Sjmcneill  * are met:
1038365ca3Sjmcneill  * 1. Redistributions of source code must retain the above copyright
1138365ca3Sjmcneill  *    notice, this list of conditions and the following disclaimer.
1238365ca3Sjmcneill  * 2. Redistributions in binary form must reproduce the above copyright
1338365ca3Sjmcneill  *    notice, this list of conditions and the following disclaimer in the
1438365ca3Sjmcneill  *    documentation and/or other materials provided with the distribution.
1538365ca3Sjmcneill  *
1638365ca3Sjmcneill  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
1738365ca3Sjmcneill  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
1838365ca3Sjmcneill  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
1938365ca3Sjmcneill  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
2038365ca3Sjmcneill  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
2138365ca3Sjmcneill  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
2238365ca3Sjmcneill  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
2338365ca3Sjmcneill  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
2438365ca3Sjmcneill  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
2538365ca3Sjmcneill  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
2638365ca3Sjmcneill  * POSSIBILITY OF SUCH DAMAGE.
2738365ca3Sjmcneill  */
2838365ca3Sjmcneill 
29d27fbb9fSjmcneill #include "opt_hz.h"
30d27fbb9fSjmcneill 
3138365ca3Sjmcneill #include <sys/cdefs.h>
32*482eef70Srin __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.27 2020/05/29 12:30:41 rin Exp $");
3338365ca3Sjmcneill 
3438365ca3Sjmcneill #include <sys/param.h>
3538365ca3Sjmcneill #include <sys/proc.h>
3638365ca3Sjmcneill #include <sys/systm.h>
3738365ca3Sjmcneill #include <sys/device.h>
3805d970b4Sreinoud #include <sys/lwp.h>
3905d970b4Sreinoud #include <sys/cpu.h>
4005d970b4Sreinoud #include <sys/malloc.h>
41e47a5502Sjoerg #include <sys/timetc.h>
426a94506dSjmcneill #include <sys/time.h>
4338365ca3Sjmcneill 
4405d970b4Sreinoud #include <machine/pcb.h>
4538365ca3Sjmcneill #include <machine/mainbus.h>
4626740a1aSjmcneill #include <machine/thunk.h>
4738365ca3Sjmcneill 
48940f2702Sjmcneill #include <dev/clock_subr.h>
49940f2702Sjmcneill 
5038365ca3Sjmcneill static int	clock_match(device_t, cfdata_t, void *);
5138365ca3Sjmcneill static void	clock_attach(device_t, device_t, void *);
5238365ca3Sjmcneill 
5316a03381Sjmcneill static unsigned int clock_getcounter(struct timecounter *);
5438365ca3Sjmcneill 
55940f2702Sjmcneill static int	clock_todr_gettime(struct todr_chip_handle *, struct timeval *);
56940f2702Sjmcneill 
571ea95bd6Sreinoud extern void setup_clock_intr(void);
581ea95bd6Sreinoud void clock_intr(void *priv);
591ea95bd6Sreinoud 
601ea95bd6Sreinoud 
61d27fbb9fSjmcneill struct clock_softc {
6238365ca3Sjmcneill 	device_t		sc_dev;
63940f2702Sjmcneill 	struct todr_chip_handle	sc_todr;
64d27fbb9fSjmcneill };
6538365ca3Sjmcneill 
66e47a5502Sjoerg static struct timecounter clock_timecounter = {
67*482eef70Srin 	.tc_get_timecount = clock_getcounter,
68*482eef70Srin 	.tc_counter_mask = ~0u,
69*482eef70Srin 	.tc_frequency = 1000000000ULL,
70*482eef70Srin 	.tc_name = "CLOCK_MONOTONIC",
71*482eef70Srin 	.tc_quality = -100,
72e47a5502Sjoerg };
73e47a5502Sjoerg 
74d27fbb9fSjmcneill timer_t clock_timerid;
751ea95bd6Sreinoud int clock_running = 0;
7684f3db98Sjmcneill 
77d27fbb9fSjmcneill CFATTACH_DECL_NEW(clock, sizeof(struct clock_softc),
7838365ca3Sjmcneill     clock_match, clock_attach, NULL, NULL);
7938365ca3Sjmcneill 
8038365ca3Sjmcneill static int
clock_match(device_t parent,cfdata_t match,void * opaque)8138365ca3Sjmcneill clock_match(device_t parent, cfdata_t match, void *opaque)
8238365ca3Sjmcneill {
8338365ca3Sjmcneill 	struct thunkbus_attach_args *taa = opaque;
8438365ca3Sjmcneill 
8538365ca3Sjmcneill 	if (taa->taa_type != THUNKBUS_TYPE_CLOCK)
8638365ca3Sjmcneill 		return 0;
8738365ca3Sjmcneill 
8838365ca3Sjmcneill 	return 1;
8938365ca3Sjmcneill }
9038365ca3Sjmcneill 
9138365ca3Sjmcneill static void
clock_attach(device_t parent,device_t self,void * opaque)9238365ca3Sjmcneill clock_attach(device_t parent, device_t self, void *opaque)
9338365ca3Sjmcneill {
94d27fbb9fSjmcneill 	struct clock_softc *sc = device_private(self);
9538365ca3Sjmcneill 
9638365ca3Sjmcneill 	aprint_naive("\n");
9738365ca3Sjmcneill 	aprint_normal("\n");
9838365ca3Sjmcneill 
9938365ca3Sjmcneill 	sc->sc_dev = self;
10038365ca3Sjmcneill 
101940f2702Sjmcneill 	sc->sc_todr.todr_gettime = clock_todr_gettime;
102940f2702Sjmcneill 	todr_attach(&sc->sc_todr);
103940f2702Sjmcneill 
104d27fbb9fSjmcneill 	clock_timerid = thunk_timer_attach();
105940f2702Sjmcneill 	clock_timecounter.tc_quality = 1000;
106e47a5502Sjoerg 	tc_init(&clock_timecounter);
1071ea95bd6Sreinoud 
1081ea95bd6Sreinoud 	setup_clock_intr();
1091ea95bd6Sreinoud 	clock_running = 1;
11038365ca3Sjmcneill }
11138365ca3Sjmcneill 
1121ea95bd6Sreinoud void
clock_intr(void * priv)113d27fbb9fSjmcneill clock_intr(void *priv)
114d27fbb9fSjmcneill {
115d27fbb9fSjmcneill 	struct clockframe cf;
116d27fbb9fSjmcneill 	int nticks = thunk_timer_getoverrun(clock_timerid) + 1;
117d27fbb9fSjmcneill 
118d27fbb9fSjmcneill 	while (nticks-- > 0) {
119d27fbb9fSjmcneill 		hardclock(&cf);
120d27fbb9fSjmcneill 	}
12184f3db98Sjmcneill }
12284f3db98Sjmcneill 
12305d970b4Sreinoud 
12416a03381Sjmcneill static unsigned int
clock_getcounter(struct timecounter * tc)125e47a5502Sjoerg clock_getcounter(struct timecounter *tc)
126e47a5502Sjoerg {
12716a03381Sjmcneill 	return thunk_getcounter();
128940f2702Sjmcneill }
129940f2702Sjmcneill 
130940f2702Sjmcneill static int
clock_todr_gettime(struct todr_chip_handle * tch,struct timeval * tv)131940f2702Sjmcneill clock_todr_gettime(struct todr_chip_handle *tch, struct timeval *tv)
132940f2702Sjmcneill {
13316a03381Sjmcneill 	struct thunk_timeval ttv;
13416a03381Sjmcneill 	int error;
13516a03381Sjmcneill 
13616a03381Sjmcneill 	error = thunk_gettimeofday(&ttv, NULL);
13716a03381Sjmcneill 	if (error)
13816a03381Sjmcneill 		return error;
13916a03381Sjmcneill 
14016a03381Sjmcneill 	tv->tv_sec = ttv.tv_sec;
14116a03381Sjmcneill 	tv->tv_usec = ttv.tv_usec;
14216a03381Sjmcneill 
14316a03381Sjmcneill 	return 0;
144e47a5502Sjoerg }
145