1 /* $NetBSD: clock.c,v 1.11 2024/07/20 20:36:33 andvar Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department, Ralph Campbell, and Kazumasa Utashiro of 11 * Software Research Associates, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah $Hdr: clock.c 1.18 91/01/21$ 38 * 39 * @(#)clock.c 8.1 (Berkeley) 6/11/93 40 */ 41 42 #include <sys/cdefs.h> 43 __KERNEL_RCSID(0, "$NetBSD: clock.c,v 1.11 2024/07/20 20:36:33 andvar Exp $"); 44 45 #include <sys/param.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 #include <sys/systm.h> 49 #include <dev/clock_subr.h> 50 51 #include <machine/cpu.h> 52 #include <machine/autoconf.h> 53 #include <machine/mainboard.h> 54 #include <machine/sysconf.h> 55 56 #define MINYEAR 1998 /* "today" */ 57 58 /* 59 * Machine-dependent clock routines. 60 * 61 * Startrtclock restarts the real-time clock, which provides 62 * hardclock interrupts to kern_clock.c. 63 * 64 * Inittodr initializes the time of day hardware which provides 65 * date functions. Its primary function is to use some file 66 * system information in case the hardware clock lost state. 67 * 68 * Resettodr restores the time of day hardware after a time change. 69 */ 70 71 /* 72 * We assume newhz is either stathz or profhz, and that neither will 73 * change after being set up above. Could recalculate intervals here 74 * but that would be a drag. 75 */ 76 void 77 setstatclockrate(int newhz) 78 { 79 } 80 81 /* 82 * Set up the real-time and statistics clocks. Leave stathz 0 only if 83 * no alternative timer is available. 84 */ 85 void 86 cpu_initclocks(void) 87 { 88 if (platform.clkinit) 89 (*platform.clkinit)(); 90 } 91