160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/* $NetBSD: clock.c,v 1.1 2002/06/06 19:48:03 fredette Exp $ */
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/* $OpenBSD: clock.c,v 1.10 2001/08/31 03:13:42 mickey Exp $ */
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/*
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* Copyright (c) 1998,1999 Michael Shalayeff
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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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* 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 Michael Shalayeff.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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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 BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND,
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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/time.h>
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#include <dev/clock_subr.h>
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#include <machine/pdc.h>
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#include <machine/iomod.h>
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#include <machine/psl.h>
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#include <machine/intr.h>
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#include <machine/reg.h>
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#include <machine/cpufunc.h>
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#include <machine/autoconf.h>
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#include <hp700/hp700/machdep.h>
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#if defined(DDB)
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#include <machine/db_machdep.h>
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#include <ddb/db_sym.h>
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#include <ddb/db_extern.h>
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#endif
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volatile struct timeval time;
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void startrtclock __P((void));
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static struct pdc_tod tod PDC_ALIGNMENT;
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void
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cpu_initclocks()
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{
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extern u_int cpu_hzticks;
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u_int time_inval;
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/* Start the interval timer. */
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mfctl(CR_ITMR, time_inval);
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mtctl(time_inval + cpu_hzticks, CR_ITMR);
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}
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int
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clock_intr (v)
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void *v;
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{
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struct clockframe *frame = v;
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/* printf ("clock int 0x%x @ 0x%x for %p\n", t,
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CLKF_PC(frame), curproc); */
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cpu_initclocks();
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if (!cold)
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hardclock(frame);
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#if 0
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ddb_regs = *frame;
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db_show_regs(NULL, 0, 0, NULL);
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#endif
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/* printf ("clock out 0x%x\n", t); */
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return 1;
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}
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/*
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* initialize the system time from the time of day clock
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*/
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void
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inittodr(t)
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time_t t;
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{
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int tbad = 0;
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int pagezero_cookie;
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if (t < 5*SECYR) {
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printf ("WARNING: preposterous time in file system");
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t = 6*SECYR + 186*SECDAY + SECDAY/2;
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tbad = 1;
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}
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pagezero_cookie = hp700_pagezero_map();
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pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_READ,
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&tod, 0, 0, 0, 0, 0);
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hp700_pagezero_unmap(pagezero_cookie);
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time.tv_sec = tod.sec;
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time.tv_usec = tod.usec;
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if (!tbad) {
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u_long dt;
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dt = (time.tv_sec < t)? t - time.tv_sec : time.tv_sec - t;
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if (dt < 2 * SECDAY)
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return;
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printf("WARNING: clock %s %ld days",
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time.tv_sec < t? "lost" : "gained", dt / SECDAY);
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}
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printf (" -- CHECK AND RESET THE DATE!\n");
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}
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/*
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* reset the time of day clock to the value in time
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*/
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void
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resettodr()
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{
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int pagezero_cookie;
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tod.sec = time.tv_sec;
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tod.usec = time.tv_usec;
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pagezero_cookie = hp700_pagezero_map();
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pdc_call((iodcio_t)PAGE0->mem_pdc, 1, PDC_TOD, PDC_TOD_WRITE, &tod);
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hp700_pagezero_unmap(pagezero_cookie);
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}
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void
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setstatclockrate(newhz)
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int newhz;
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{
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/* nothing we can do */
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}
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