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/* $OpenBSD: clock.c,v 1.14 2002/05/14 20:41:33 mickey Exp $ */
/*
* Copyright (c) 1998,1999 Michael Shalayeff
* 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 Michael Shalayeff.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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 MIND,
* 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/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <dev/clock_subr.h>
#include <machine/pdc.h>
#include <machine/iomod.h>
#include <machine/psl.h>
#include <machine/intr.h>
#include <machine/reg.h>
#include <machine/cpufunc.h>
#include <machine/autoconf.h>
#if defined(DDB)
#include <uvm/uvm_extern.h>
#include <machine/db_machdep.h>
#include <ddb/db_sym.h>
#include <ddb/db_extern.h>
#endif
struct timeval time;
void startrtclock(void);
void
cpu_initclocks()
{
extern u_int cpu_hzticks;
u_int time_inval;
/* Start the interval timer. */
mfctl(CR_ITMR, time_inval);
mtctl(time_inval + cpu_hzticks, CR_ITMR);
}
int
clock_intr (v)
void *v;
{
struct trapframe *frame = v;
/* printf ("clock int 0x%x @ 0x%x for %p\n", t,
frame->tf_iioq_head, curproc); */
cpu_initclocks();
hardclock(frame);
#if 0
ddb_regs = *frame;
db_show_regs(NULL, 0, 0, NULL);
#endif
/* printf ("clock out 0x%x\n", t); */
return 1;
}
/*
* initialize the system time from the time of day clock
*/
void
inittodr(t)
time_t t;
{
struct pdc_tod tod PDC_ALIGNMENT;
int tbad = 0;
if (t < 5*SECYR) {
printf ("WARNING: preposterous time in file system");
t = 6*SECYR + 186*SECDAY + SECDAY/2;
tbad = 1;
}
pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_READ,
&tod, 0, 0, 0, 0, 0);
time.tv_sec = tod.sec;
time.tv_usec = tod.usec;
if (!tbad) {
u_long dt;
dt = (time.tv_sec < t)? t - time.tv_sec : time.tv_sec - t;
if (dt < 2 * SECDAY)
return;
printf("WARNING: clock %s %ld days",
time.tv_sec < t? "lost" : "gained", dt / SECDAY);
}
printf (" -- CHECK AND RESET THE DATE!\n");
}
/*
* reset the time of day clock to the value in time
*/
void
resettodr()
{
pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_WRITE,
time.tv_sec, time.tv_usec);
}
void
setstatclockrate(newhz)
int newhz;
{
/* nothing we can do */
}
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