1 /* $OpenBSD: clock.c,v 1.19 2003/10/15 18:54:55 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 extern volatile u_long cpu_itmr; 59 extern u_long cpu_hzticks; 60 u_long __itmr; 61 62 mfctl(CR_ITMR, __itmr); 63 cpu_itmr = __itmr; 64 __itmr += cpu_hzticks; 65 mtctl(__itmr, CR_ITMR); 66 } 67 68 /* 69 * initialize the system time from the time of day clock 70 */ 71 void 72 inittodr(t) 73 time_t t; 74 { 75 struct pdc_tod tod PDC_ALIGNMENT; 76 int error, tbad = 0; 77 78 if (t < 12*SECYR) { 79 printf ("WARNING: preposterous time in file system"); 80 t = 6*SECYR + 186*SECDAY + SECDAY/2; 81 tbad = 1; 82 } 83 84 if ((error = pdc_call((iodcio_t)pdc, 85 1, PDC_TOD, PDC_TOD_READ, &tod, 0, 0, 0, 0, 0))) 86 printf("clock: failed to fetch (%d)\n", error); 87 88 time.tv_sec = tod.sec; 89 time.tv_usec = tod.usec; 90 91 if (!tbad) { 92 u_long dt; 93 94 dt = (time.tv_sec < t)? t - time.tv_sec : time.tv_sec - t; 95 96 if (dt < 2 * SECDAY) 97 return; 98 printf("WARNING: clock %s %ld days", 99 time.tv_sec < t? "lost" : "gained", dt / SECDAY); 100 } 101 102 printf (" -- CHECK AND RESET THE DATE!\n"); 103 } 104 105 /* 106 * reset the time of day clock to the value in time 107 */ 108 void 109 resettodr() 110 { 111 int error; 112 113 if ((error = pdc_call((iodcio_t)pdc, 1, PDC_TOD, PDC_TOD_WRITE, 114 time.tv_sec, time.tv_usec))) 115 printf("clock: failed to save (%d)\n"); 116 } 117 118 void 119 setstatclockrate(newhz) 120 int newhz; 121 { 122 /* nothing we can do */ 123 } 124