2 * Copyright (c) 2006,2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * $DragonFly: src/sys/platform/pc64/amd64/systimer.c,v 1.3 2008/08/29 17:07:10 dillon Exp $
37 #include <sys/types.h>
38 #include <sys/systm.h>
39 #include <sys/kernel.h>
40 #include <sys/systimer.h>
41 #include <sys/sysctl.h>
42 #include <sys/signal.h>
43 #include <sys/interrupt.h>
46 #include <machine/globaldata.h>
47 #include <machine/md_var.h>
51 int wall_cmos_clock = 0;
55 * SYSTIMER IMPLEMENTATION
59 * Initialize the systimer subsystem, called from MI code in early boot.
62 cpu_initclocks(void *arg __unused)
67 * Configure the interrupt for our core systimer. Use the kqueue timer
71 cputimer_intr_config(struct cputimer *timer)
76 * Reload the interrupt for our core systimer. Because the caller's
77 * reload calculation can be negatively indexed, we need a minimal
78 * check to ensure that a reasonable reload value is selected.
81 cputimer_intr_reload(sysclock_t reload)
86 * Initialize the time of day register, based on the time base which is, e.g.
95 * Write system time back to the RTC
108 DRIVERSLEEP(int usec)