1 /* $OpenBSD: clock.c,v 1.17 2002/11/27 21:47:14 mickey Exp $ */ 2 3 /* 4 * Copyright (c) 1998,1999 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by Michael Shalayeff. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 22 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 23 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 24 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 26 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND, 27 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 30 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/kernel.h> 36 #include <sys/time.h> 37 38 #include <dev/clock_subr.h> 39 40 #include <machine/pdc.h> 41 #include <machine/iomod.h> 42 #include <machine/psl.h> 43 #include <machine/intr.h> 44 #include <machine/reg.h> 45 #include <machine/cpufunc.h> 46 #include <machine/autoconf.h> 47 48 #if defined(DDB) 49 #include <uvm/uvm_extern.h> 50 #include <machine/db_machdep.h> 51 #include <ddb/db_sym.h> 52 #include <ddb/db_extern.h> 53 #endif 54 55 void 56 cpu_initclocks() 57 { 58 CPU_CLOCKUPDATE(); 59 } 60 61 /* 62 * initialize the system time from the time of day clock 63 */ 64 void 65 inittodr(t) 66 time_t t; 67 { 68 struct pdc_tod tod PDC_ALIGNMENT; 69 int error, tbad = 0; 70 71 if (t < 12*SECYR) { 72 printf ("WARNING: preposterous time in file system"); 73 t = 6*SECYR + 186*SECDAY + SECDAY/2; 74 tbad = 1; 75 } 76 77 if ((error = pdc_call((iodcio_t)pdc, 78 1, PDC_TOD, PDC_TOD_READ, &tod, 0, 0, 0, 0, 0))) 79 printf("clock: failed to fetch (%d)\n", error); 80 81 time.tv_sec = tod.sec; 82 time.tv_usec = tod.usec; 83 84 if (!tbad) { 85 u_long dt; 86 87 dt = (time.tv_sec < t)? t - time.tv_sec : time.tv_sec - t; 88 89 if (dt < 2 * SECDAY) 90 return; 91 printf("WARNING: clock %s %ld days", 92 time.tv_sec < t? "lost" : "gained", dt / SECDAY); 93 } 94 95 printf (" -- CHECK AND RESET THE DATE!\n"); 96 } 97 98 /* 99 * reset the time of day clock to the value in time 100 */ 101 void 102 resettodr() 103 { 104 int error; 105 106 if ((error = pdc_call((iodcio_t)pdc, 1, PDC_TOD, PDC_TOD_WRITE, 107 time.tv_sec, time.tv_usec))) 108 printf("clock: failed to save (%d)\n"); 109 } 110 111 void 112 setstatclockrate(newhz) 113 int newhz; 114 { 115 /* nothing we can do */ 116 } 117