/* $OpenBSD: clock.c,v 1.19 2003/10/15 18:54:55 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 void cpu_initclocks() { extern volatile u_long cpu_itmr; extern u_long cpu_hzticks; u_long __itmr; mfctl(CR_ITMR, __itmr); cpu_itmr = __itmr; __itmr += cpu_hzticks; mtctl(__itmr, CR_ITMR); } /* * initialize the system time from the time of day clock */ void inittodr(t) time_t t; { struct pdc_tod tod PDC_ALIGNMENT; int error, tbad = 0; if (t < 12*SECYR) { printf ("WARNING: preposterous time in file system"); t = 6*SECYR + 186*SECDAY + SECDAY/2; tbad = 1; } if ((error = pdc_call((iodcio_t)pdc, 1, PDC_TOD, PDC_TOD_READ, &tod, 0, 0, 0, 0, 0))) printf("clock: failed to fetch (%d)\n", error); 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() { int error; if ((error = pdc_call((iodcio_t)pdc, 1, PDC_TOD, PDC_TOD_WRITE, time.tv_sec, time.tv_usec))) printf("clock: failed to save (%d)\n"); } void setstatclockrate(newhz) int newhz; { /* nothing we can do */ }