* Copyright (c) 1988 Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 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
* @(#)clock.c 7.4 (Berkeley) 12/16/90
#include "../include/pte.h"
#include "../include/cpu.h"
#include "../include/mtpr.h"
#include "../include/clock.h"
* Machine-dependent clock routines.
* Startrtclock restarts the real-time clock, which provides
* hardclock interrupts to kern_clock.c.
* Inittodr initializes any time of day hardware which provides
* date functions. Its primary function is to use some file
* system information in case the hardare clock lost state.
* Start the real-time clock by initializing the
* interval timer on the console processor card
static struct cphdr cpclock
; /* must be in data space */
cpclock
.cp_unit
= CPCLOCK
;
cpclock
.cp_comm
= CPWRITE
;
extern int tickadj
; /* XXX */
tickadj
= 240000 / (60 * hz
);
printf("clock set to %dhz\n", hz
);
cpclock
.cp_count
= hztocount(hz
);
/* try to insure last cmd was taken by cp */
for (t
= 30000; (cnlast
->cp_unit
&CPTAKE
) == 0 && t
> 0; t
--)
uncache(&cnlast
->cp_unit
);
mtpr(CPMDCB
, kvtophys(&cpclock
));
for (t
= 30000; (cpclock
.cp_unit
&CPDONE
) == 0 && t
> 0; t
--)
uncache(&cpclock
.cp_unit
);
* Initialze the time of day register, based on
* the time base which is, e.g. from a filesystem.
printf("WARNING: preposterous time in file system ");
time
.tv_sec
= 6*SECYR
+ 186*SECDAY
+ SECDAY
/2;
printf("CHECK AND RESET THE DATE!\n");