Add a generic implementation of inittodr() and resettodr(), as well as
a set of helper routines to deal with real-time clocks. The generic functions access the clock diver using a kobj interface. This is intended to reduce code reduplication and make it easy to support more than one clock model on a single architecture. This code is currently only used on sparc64, but it is planned to convert the code of the other architectures to it later.
This commit is contained in:
Thomas Moestl
parent
2c7178b5fc
commit
d7f7792edf
@ -16,6 +16,7 @@ aic7xxx_{seq,reg}.h optional ahc \
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dependency "$S/dev/aic7xxx/aic7xxx.{reg,seq} $S/cam/scsi/scsi_message.h aicasm"
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kern/device_if.m standard
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kern/bus_if.m standard
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kern/clock_if.m optional genclock
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kern/linker_if.m standard
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cam/cam.c optional scbus
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cam/cam_extend.c optional scbus
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@ -838,6 +839,7 @@ kern/md5c.c standard
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kern/subr_autoconf.c standard
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kern/subr_blist.c standard
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kern/subr_bus.c standard
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kern/subr_clock.c optional genclock
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kern/subr_devstat.c standard
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kern/subr_disk.c standard
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kern/subr_disklabel.c standard
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44
sys/kern/clock_if.m
Normal file
44
sys/kern/clock_if.m
Normal file
@ -0,0 +1,44 @@
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# Copyright (c) 2001 by Thomas Moestl <tmm@FreeBSD.org>.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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# IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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# OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#
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# $FreeBSD$
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#include <sys/bus.h>
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#include <sys/time.h>
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INTERFACE clock;
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# Interface for clock drivers. This is inspired by the NetBSD device-independent
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# clock code (by Gordon W. Ross).
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# An EINVAL error return from this call signifies that the clock has an illegal
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# setting.
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METHOD int gettime {
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device_t dev;
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struct timespec *ts;
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};
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METHOD int settime {
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device_t dev;
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struct timespec *ts;
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};
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316
sys/kern/subr_clock.c
Normal file
316
sys/kern/subr_clock.c
Normal file
@ -0,0 +1,316 @@
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/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Utah $Hdr: clock.c 1.18 91/01/21$
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* from: @(#)clock.c 8.2 (Berkeley) 1/12/94
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* from: NetBSD: clock_subr.c,v 1.6 2001/07/07 17:04:02 thorpej Exp
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* and
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* from: src/sys/i386/isa/clock.c,v 1.176 2001/09/04
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*
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* $FreeBSD$
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*/
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/*
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* Helpers for time-of-day clocks. This is useful for architectures that need
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* support multiple models of such clocks, and generally serves to make the
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* code more machine-independent.
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* If the clock in question can also be used as a time counter, the driver
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* needs to initiate this.
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* This code is not yet used by all architectures.
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*/
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/*
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* Generic routines to convert between a POSIX date
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* (seconds since 1/1/1970) and yr/mo/day/hr/min/sec
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* Derived from NetBSD arch/hp300/hp300/clock.c
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/bus.h>
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#include <sys/clock.h>
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#include <sys/sysctl.h>
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#include <sys/timetc.h>
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#include "clock_if.h"
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static __inline int leapyear(int year);
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static int sysctl_machdep_adjkerntz(SYSCTL_HANDLER_ARGS);
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#define FEBRUARY 2
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#define days_in_year(y) (leapyear(y) ? 366 : 365)
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#define days_in_month(y, m) \
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(month_days[(m) - 1] + (m == FEBRUARY ? leapyear(y) : 0))
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/* Day of week. Days are counted from 1/1/1970, which was a Thursday */
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#define day_of_week(days) (((days) + 4) % 7)
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static const int month_days[12] = {
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31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
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};
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static device_t clock_dev = NULL;
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static long clock_res;
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int adjkerntz; /* local offset from GMT in seconds */
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int disable_rtc_set; /* disable resettodr() if != 0 */
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int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
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/*
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* These have traditionally been in machdep, but should probably be moved to
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* kern.
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*/
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SYSCTL_PROC(_machdep, OID_AUTO, adjkerntz, CTLTYPE_INT|CTLFLAG_RW,
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&adjkerntz, 0, sysctl_machdep_adjkerntz, "I", "");
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SYSCTL_INT(_machdep, OID_AUTO, disable_rtc_set,
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CTLFLAG_RW, &disable_rtc_set, 0, "");
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SYSCTL_INT(_machdep, OID_AUTO, wall_cmos_clock,
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CTLFLAG_RW, &wall_cmos_clock, 0, "");
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static int
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sysctl_machdep_adjkerntz(SYSCTL_HANDLER_ARGS)
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{
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int error;
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error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2,
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req);
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if (!error && req->newptr)
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resettodr();
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return (error);
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}
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/*
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* This inline avoids some unnecessary modulo operations
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* as compared with the usual macro:
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* ( ((year % 4) == 0 &&
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* (year % 100) != 0) ||
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* ((year % 400) == 0) )
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* It is otherwise equivalent.
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*/
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static __inline int
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leapyear(int year)
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{
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int rv = 0;
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if ((year & 3) == 0) {
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rv = 1;
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if ((year % 100) == 0) {
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rv = 0;
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if ((year % 400) == 0)
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rv = 1;
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}
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}
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return (rv);
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}
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int
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clock_ct_to_ts(struct clocktime *ct, struct timespec *ts)
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{
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time_t secs;
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int i, year, days;
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year = ct->year;
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/* Sanity checks. */
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if (ct->mon < 1 || ct->mon > 12 || ct->day < 1 ||
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ct->day > days_in_month(year, ct->mon) ||
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ct->hour > 23 || ct->min > 59 || ct->sec > 59 ||
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ct->year > 2037) /* time_t overflow */
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return (EINVAL);
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/*
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* Compute days since start of time
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* First from years, then from months.
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*/
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days = 0;
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for (i = POSIX_BASE_YEAR; i < year; i++)
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days += days_in_year(i);
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/* Months */
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for (i = 1; i < ct->mon; i++)
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days += days_in_month(year, i);
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days += (ct->day - 1);
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/* Another sanity check. */
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if (ct->dow != -1 && ct->dow != day_of_week(days))
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return (EINVAL);
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/* Add hours, minutes, seconds. */
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secs = ((days * 24 + ct->hour) * 60 + ct->min) * 60 + ct->sec;
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ts->tv_sec = secs;
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ts->tv_nsec = ct->nsec;
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return (0);
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}
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void
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clock_ts_to_ct(struct timespec *ts, struct clocktime *ct)
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{
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int i, year, days;
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time_t rsec; /* remainder seconds */
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time_t secs;
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secs = ts->tv_sec;
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days = secs / SECDAY;
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rsec = secs % SECDAY;
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ct->dow = day_of_week(days);
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/* Subtract out whole years, counting them in i. */
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for (year = POSIX_BASE_YEAR; days >= days_in_year(year); year++)
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days -= days_in_year(year);
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ct->year = year;
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/* Subtract out whole months, counting them in i. */
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for (i = 1; days >= days_in_month(year, i); i++)
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days -= days_in_month(year, i);
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ct->mon = i;
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/* Days are what is left over (+1) from all that. */
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ct->day = days + 1;
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/* Hours, minutes, seconds are easy */
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ct->hour = rsec / 3600;
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rsec = rsec % 3600;
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ct->min = rsec / 60;
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rsec = rsec % 60;
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ct->sec = rsec;
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ct->nsec = ts->tv_nsec;
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}
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void
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clock_register(device_t dev, long res)
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{
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if (clock_dev != NULL) {
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if (clock_res > res) {
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if (bootverbose) {
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device_printf(dev, "not installed as "
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"time-of-day clock: clock %s has higher "
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"resolution\n", device_get_name(clock_dev));
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}
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return;
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} else {
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if (bootverbose) {
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device_printf(clock_dev, "removed as "
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"time-of-day clock: clock %s has higher "
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"resolution\n", device_get_name(dev));
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}
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}
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}
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clock_dev = dev;
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clock_res = res;
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if (bootverbose) {
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device_printf(dev, "registered as a time-of-day clock "
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"(resolution %ldus)\n", res);
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}
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}
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/*
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* inittodr and settodr derived from the i386 versions written
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* by Christoph Robitschko <chmr@edvz.tu-graz.ac.at>, reintroduced and
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* updated by Chris Stenton <chris@gnome.co.uk> 8/10/94
|
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*/
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/*
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* Initialize the time of day register, based on the time base which is, e.g.
|
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* from a filesystem.
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*/
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void
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inittodr(time_t base)
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{
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struct timespec diff, ref, ts;
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int error;
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|
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if (base) {
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ref.tv_sec = base;
|
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ref.tv_nsec = 0;
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tc_setclock(&ref);
|
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}
|
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|
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if (clock_dev == NULL) {
|
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printf("warning: no time-of-day clock registered, system time "
|
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"will not be set accurately\n");
|
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return;
|
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}
|
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error = CLOCK_GETTIME(clock_dev, &ts);
|
||||
if (error != 0 && error != EINVAL) {
|
||||
printf("warning: clock_gettime failed (%d), the system time "
|
||||
"will not be set accurately\n", error);
|
||||
return;
|
||||
}
|
||||
if (error == EINVAL || ts.tv_sec < 0) {
|
||||
printf("Invalid time in real time clock.\n");
|
||||
printf("Check and reset the date immediately!\n");
|
||||
}
|
||||
|
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ts.tv_sec += tz.tz_minuteswest * 60 +
|
||||
(wall_cmos_clock ? adjkerntz : 0);
|
||||
|
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if (timespeccmp(&ref, &ts, >)) {
|
||||
diff = ref;
|
||||
timespecsub(&ref, &ts);
|
||||
} else {
|
||||
diff = ts;
|
||||
timespecsub(&diff, &ref);
|
||||
}
|
||||
if (ts.tv_sec >= 2) {
|
||||
/* badly off, adjust it */
|
||||
tc_setclock(&ts);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Write system time back to RTC
|
||||
*/
|
||||
void
|
||||
resettodr()
|
||||
{
|
||||
struct timespec ts;
|
||||
int error;
|
||||
|
||||
if (disable_rtc_set || clock_dev == NULL)
|
||||
return;
|
||||
|
||||
getnanotime(&ts);
|
||||
ts.tv_sec -= tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0);
|
||||
if ((error = CLOCK_SETTIME(clock_dev, &ts)) != 0) {
|
||||
printf("warning: clock_settime failed (%d), time-of-day clock "
|
||||
"not adjusted to system time\n", error);
|
||||
return;
|
||||
}
|
||||
}
|
||||
316
sys/kern/subr_rtc.c
Normal file
316
sys/kern/subr_rtc.c
Normal file
@ -0,0 +1,316 @@
|
||||
/*
|
||||
* Copyright (c) 1988 University of Utah.
|
||||
* Copyright (c) 1982, 1990, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* the Systems Programming Group of the University of Utah Computer
|
||||
* Science Department.
|
||||
*
|
||||
* 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 the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
|
||||
*
|
||||
* from: Utah $Hdr: clock.c 1.18 91/01/21$
|
||||
* from: @(#)clock.c 8.2 (Berkeley) 1/12/94
|
||||
* from: NetBSD: clock_subr.c,v 1.6 2001/07/07 17:04:02 thorpej Exp
|
||||
* and
|
||||
* from: src/sys/i386/isa/clock.c,v 1.176 2001/09/04
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
/*
|
||||
* Helpers for time-of-day clocks. This is useful for architectures that need
|
||||
* support multiple models of such clocks, and generally serves to make the
|
||||
* code more machine-independent.
|
||||
* If the clock in question can also be used as a time counter, the driver
|
||||
* needs to initiate this.
|
||||
* This code is not yet used by all architectures.
|
||||
*/
|
||||
|
||||
/*
|
||||
* Generic routines to convert between a POSIX date
|
||||
* (seconds since 1/1/1970) and yr/mo/day/hr/min/sec
|
||||
* Derived from NetBSD arch/hp300/hp300/clock.c
|
||||
*/
|
||||
#include <sys/param.h>
|
||||
#include <sys/systm.h>
|
||||
#include <sys/kernel.h>
|
||||
#include <sys/bus.h>
|
||||
#include <sys/clock.h>
|
||||
#include <sys/sysctl.h>
|
||||
#include <sys/timetc.h>
|
||||
|
||||
#include "clock_if.h"
|
||||
|
||||
static __inline int leapyear(int year);
|
||||
static int sysctl_machdep_adjkerntz(SYSCTL_HANDLER_ARGS);
|
||||
|
||||
#define FEBRUARY 2
|
||||
#define days_in_year(y) (leapyear(y) ? 366 : 365)
|
||||
#define days_in_month(y, m) \
|
||||
(month_days[(m) - 1] + (m == FEBRUARY ? leapyear(y) : 0))
|
||||
/* Day of week. Days are counted from 1/1/1970, which was a Thursday */
|
||||
#define day_of_week(days) (((days) + 4) % 7)
|
||||
|
||||
static const int month_days[12] = {
|
||||
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
|
||||
};
|
||||
|
||||
static device_t clock_dev = NULL;
|
||||
static long clock_res;
|
||||
|
||||
int adjkerntz; /* local offset from GMT in seconds */
|
||||
int disable_rtc_set; /* disable resettodr() if != 0 */
|
||||
int wall_cmos_clock; /* wall CMOS clock assumed if != 0 */
|
||||
|
||||
/*
|
||||
* These have traditionally been in machdep, but should probably be moved to
|
||||
* kern.
|
||||
*/
|
||||
SYSCTL_PROC(_machdep, OID_AUTO, adjkerntz, CTLTYPE_INT|CTLFLAG_RW,
|
||||
&adjkerntz, 0, sysctl_machdep_adjkerntz, "I", "");
|
||||
|
||||
SYSCTL_INT(_machdep, OID_AUTO, disable_rtc_set,
|
||||
CTLFLAG_RW, &disable_rtc_set, 0, "");
|
||||
|
||||
SYSCTL_INT(_machdep, OID_AUTO, wall_cmos_clock,
|
||||
CTLFLAG_RW, &wall_cmos_clock, 0, "");
|
||||
|
||||
static int
|
||||
sysctl_machdep_adjkerntz(SYSCTL_HANDLER_ARGS)
|
||||
{
|
||||
int error;
|
||||
error = sysctl_handle_int(oidp, oidp->oid_arg1, oidp->oid_arg2,
|
||||
req);
|
||||
if (!error && req->newptr)
|
||||
resettodr();
|
||||
return (error);
|
||||
}
|
||||
|
||||
/*
|
||||
* This inline avoids some unnecessary modulo operations
|
||||
* as compared with the usual macro:
|
||||
* ( ((year % 4) == 0 &&
|
||||
* (year % 100) != 0) ||
|
||||
* ((year % 400) == 0) )
|
||||
* It is otherwise equivalent.
|
||||
*/
|
||||
static __inline int
|
||||
leapyear(int year)
|
||||
{
|
||||
int rv = 0;
|
||||
|
||||
if ((year & 3) == 0) {
|
||||
rv = 1;
|
||||
if ((year % 100) == 0) {
|
||||
rv = 0;
|
||||
if ((year % 400) == 0)
|
||||
rv = 1;
|
||||
}
|
||||
}
|
||||
return (rv);
|
||||
}
|
||||
|
||||
int
|
||||
clock_ct_to_ts(struct clocktime *ct, struct timespec *ts)
|
||||
{
|
||||
time_t secs;
|
||||
int i, year, days;
|
||||
|
||||
year = ct->year;
|
||||
|
||||
/* Sanity checks. */
|
||||
if (ct->mon < 1 || ct->mon > 12 || ct->day < 1 ||
|
||||
ct->day > days_in_month(year, ct->mon) ||
|
||||
ct->hour > 23 || ct->min > 59 || ct->sec > 59 ||
|
||||
ct->year > 2037) /* time_t overflow */
|
||||
return (EINVAL);
|
||||
|
||||
/*
|
||||
* Compute days since start of time
|
||||
* First from years, then from months.
|
||||
*/
|
||||
days = 0;
|
||||
for (i = POSIX_BASE_YEAR; i < year; i++)
|
||||
days += days_in_year(i);
|
||||
|
||||
/* Months */
|
||||
for (i = 1; i < ct->mon; i++)
|
||||
days += days_in_month(year, i);
|
||||
days += (ct->day - 1);
|
||||
|
||||
/* Another sanity check. */
|
||||
if (ct->dow != -1 && ct->dow != day_of_week(days))
|
||||
return (EINVAL);
|
||||
|
||||
/* Add hours, minutes, seconds. */
|
||||
secs = ((days * 24 + ct->hour) * 60 + ct->min) * 60 + ct->sec;
|
||||
|
||||
ts->tv_sec = secs;
|
||||
ts->tv_nsec = ct->nsec;
|
||||
return (0);
|
||||
}
|
||||
|
||||
void
|
||||
clock_ts_to_ct(struct timespec *ts, struct clocktime *ct)
|
||||
{
|
||||
int i, year, days;
|
||||
time_t rsec; /* remainder seconds */
|
||||
time_t secs;
|
||||
|
||||
secs = ts->tv_sec;
|
||||
days = secs / SECDAY;
|
||||
rsec = secs % SECDAY;
|
||||
|
||||
ct->dow = day_of_week(days);
|
||||
|
||||
/* Subtract out whole years, counting them in i. */
|
||||
for (year = POSIX_BASE_YEAR; days >= days_in_year(year); year++)
|
||||
days -= days_in_year(year);
|
||||
ct->year = year;
|
||||
|
||||
/* Subtract out whole months, counting them in i. */
|
||||
for (i = 1; days >= days_in_month(year, i); i++)
|
||||
days -= days_in_month(year, i);
|
||||
ct->mon = i;
|
||||
|
||||
/* Days are what is left over (+1) from all that. */
|
||||
ct->day = days + 1;
|
||||
|
||||
/* Hours, minutes, seconds are easy */
|
||||
ct->hour = rsec / 3600;
|
||||
rsec = rsec % 3600;
|
||||
ct->min = rsec / 60;
|
||||
rsec = rsec % 60;
|
||||
ct->sec = rsec;
|
||||
ct->nsec = ts->tv_nsec;
|
||||
}
|
||||
|
||||
void
|
||||
clock_register(device_t dev, long res)
|
||||
{
|
||||
|
||||
if (clock_dev != NULL) {
|
||||
if (clock_res > res) {
|
||||
if (bootverbose) {
|
||||
device_printf(dev, "not installed as "
|
||||
"time-of-day clock: clock %s has higher "
|
||||
"resolution\n", device_get_name(clock_dev));
|
||||
}
|
||||
return;
|
||||
} else {
|
||||
if (bootverbose) {
|
||||
device_printf(clock_dev, "removed as "
|
||||
"time-of-day clock: clock %s has higher "
|
||||
"resolution\n", device_get_name(dev));
|
||||
}
|
||||
}
|
||||
}
|
||||
clock_dev = dev;
|
||||
clock_res = res;
|
||||
if (bootverbose) {
|
||||
device_printf(dev, "registered as a time-of-day clock "
|
||||
"(resolution %ldus)\n", res);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* inittodr and settodr derived from the i386 versions written
|
||||
* by Christoph Robitschko <chmr@edvz.tu-graz.ac.at>, reintroduced and
|
||||
* updated by Chris Stenton <chris@gnome.co.uk> 8/10/94
|
||||
*/
|
||||
|
||||
/*
|
||||
* Initialize the time of day register, based on the time base which is, e.g.
|
||||
* from a filesystem.
|
||||
*/
|
||||
void
|
||||
inittodr(time_t base)
|
||||
{
|
||||
struct timespec diff, ref, ts;
|
||||
int error;
|
||||
|
||||
if (base) {
|
||||
ref.tv_sec = base;
|
||||
ref.tv_nsec = 0;
|
||||
tc_setclock(&ref);
|
||||
}
|
||||
|
||||
if (clock_dev == NULL) {
|
||||
printf("warning: no time-of-day clock registered, system time "
|
||||
"will not be set accurately\n");
|
||||
return;
|
||||
}
|
||||
error = CLOCK_GETTIME(clock_dev, &ts);
|
||||
if (error != 0 && error != EINVAL) {
|
||||
printf("warning: clock_gettime failed (%d), the system time "
|
||||
"will not be set accurately\n", error);
|
||||
return;
|
||||
}
|
||||
if (error == EINVAL || ts.tv_sec < 0) {
|
||||
printf("Invalid time in real time clock.\n");
|
||||
printf("Check and reset the date immediately!\n");
|
||||
}
|
||||
|
||||
ts.tv_sec += tz.tz_minuteswest * 60 +
|
||||
(wall_cmos_clock ? adjkerntz : 0);
|
||||
|
||||
if (timespeccmp(&ref, &ts, >)) {
|
||||
diff = ref;
|
||||
timespecsub(&ref, &ts);
|
||||
} else {
|
||||
diff = ts;
|
||||
timespecsub(&diff, &ref);
|
||||
}
|
||||
if (ts.tv_sec >= 2) {
|
||||
/* badly off, adjust it */
|
||||
tc_setclock(&ts);
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Write system time back to RTC
|
||||
*/
|
||||
void
|
||||
resettodr()
|
||||
{
|
||||
struct timespec ts;
|
||||
int error;
|
||||
|
||||
if (disable_rtc_set || clock_dev == NULL)
|
||||
return;
|
||||
|
||||
getnanotime(&ts);
|
||||
ts.tv_sec -= tz.tz_minuteswest * 60 + (wall_cmos_clock ? adjkerntz : 0);
|
||||
if ((error = CLOCK_SETTIME(clock_dev, &ts)) != 0) {
|
||||
printf("warning: clock_settime failed (%d), time-of-day clock "
|
||||
"not adjusted to system time\n", error);
|
||||
return;
|
||||
}
|
||||
}
|
||||
77
sys/sys/clock.h
Normal file
77
sys/sys/clock.h
Normal file
@ -0,0 +1,77 @@
|
||||
/*-
|
||||
* Copyright (c) 1996 The NetBSD Foundation, Inc.
|
||||
* All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to The NetBSD Foundation
|
||||
* by Gordon W. Ross
|
||||
*
|
||||
* 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 the NetBSD
|
||||
* Foundation, Inc. and its contributors.
|
||||
* 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.
|
||||
*
|
||||
* $NetBSD: clock_subr.h,v 1.7 2000/10/03 13:41:07 tsutsui Exp $
|
||||
*
|
||||
* $FreeBSD$
|
||||
*/
|
||||
|
||||
#ifndef _SYS_CLOCK_H_
|
||||
#define _SYS_CLOCK_H_
|
||||
|
||||
/*
|
||||
* Structure to hold the values typically reported by time-of-day clocks.
|
||||
* This can be passed to the generic conversion functions to be converted
|
||||
* to a struct timespec.
|
||||
*/
|
||||
struct clocktime {
|
||||
int year; /* year - 1900 */
|
||||
int mon; /* month (1 - 12) */
|
||||
int day; /* day (1 - 31) */
|
||||
int hour; /* hour (0 - 23) */
|
||||
int min; /* minute (0 - 59) */
|
||||
int sec; /* second (0 - 59) */
|
||||
int dow; /* day of week (0 - 6; 0 = Sunday) */
|
||||
long nsec; /* nano seconds */
|
||||
};
|
||||
|
||||
int clock_ct_to_ts(struct clocktime *, struct timespec *);
|
||||
void clock_ts_to_ct(struct timespec *, struct clocktime *);
|
||||
void clock_register(device_t, long);
|
||||
|
||||
/*
|
||||
* BCD to decimal and decimal to BCD.
|
||||
*/
|
||||
#define FROMBCD(x) (((x) >> 4) * 10 + ((x) & 0xf))
|
||||
#define TOBCD(x) (((x) / 10 * 16) + ((x) % 10))
|
||||
|
||||
/* Some handy constants. */
|
||||
#define SECDAY (24 * 60 * 60)
|
||||
#define SECYR (SECDAY * 365)
|
||||
|
||||
/* Traditional POSIX base year */
|
||||
#define POSIX_BASE_YEAR 1970
|
||||
|
||||
#endif /* !_SYS_CLOCK_H_ */
|
||||
Loading…
Reference in New Issue
Block a user