160 lines
4.0 KiB
C
160 lines
4.0 KiB
C
/* $NetBSD: clock.c,v 1.3 2003/11/23 17:09:29 chs Exp $ */
|
|
|
|
/* $OpenBSD: clock.c,v 1.10 2001/08/31 03:13:42 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/cdefs.h>
|
|
__KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.3 2003/11/23 17:09:29 chs Exp $");
|
|
|
|
#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>
|
|
|
|
#include <hp700/hp700/machdep.h>
|
|
|
|
#if defined(DDB)
|
|
#include <machine/db_machdep.h>
|
|
#include <ddb/db_sym.h>
|
|
#include <ddb/db_extern.h>
|
|
#endif
|
|
|
|
volatile struct timeval time;
|
|
|
|
void startrtclock(void);
|
|
|
|
static struct pdc_tod tod PDC_ALIGNMENT;
|
|
|
|
void
|
|
cpu_initclocks(void)
|
|
{
|
|
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(void *v)
|
|
{
|
|
struct clockframe *frame = v;
|
|
|
|
/* printf ("clock int 0x%x @ 0x%x for %p\n", t,
|
|
CLKF_PC(frame), curproc); */
|
|
|
|
cpu_initclocks();
|
|
if (!cold)
|
|
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(time_t t)
|
|
{
|
|
int tbad = 0;
|
|
int pagezero_cookie;
|
|
|
|
if (t < 5*SECYR) {
|
|
printf ("WARNING: preposterous time in file system");
|
|
t = 6*SECYR + 186*SECDAY + SECDAY/2;
|
|
tbad = 1;
|
|
}
|
|
|
|
pagezero_cookie = hp700_pagezero_map();
|
|
pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_READ,
|
|
&tod, 0, 0, 0, 0, 0);
|
|
hp700_pagezero_unmap(pagezero_cookie);
|
|
|
|
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(void)
|
|
{
|
|
int pagezero_cookie;
|
|
|
|
tod.sec = time.tv_sec;
|
|
tod.usec = time.tv_usec;
|
|
|
|
pagezero_cookie = hp700_pagezero_map();
|
|
pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_WRITE, &tod);
|
|
hp700_pagezero_unmap(pagezero_cookie);
|
|
}
|
|
|
|
void
|
|
setstatclockrate(int newhz)
|
|
{
|
|
/* nothing we can do */
|
|
}
|
|
|