1 /* $NetBSD: clock.c,v 1.3 2000/07/24 18:40:00 jdolecek Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * Copyright (c) 1994 Gordon W. Ross 7 * Copyright (c) 1993 Adam Glass 8 * 9 * This software was developed by the Computer Systems Engineering group 10 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 11 * contributed to Berkeley. 12 * 13 * All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Lawrence Berkeley Laboratory. 17 * 18 * Redistribution and use in source and binary forms, with or without 19 * modification, are permitted provided that the following conditions 20 * are met: 21 * 1. Redistributions of source code must retain the above copyright 22 * notice, this list of conditions and the following disclaimer. 23 * 2. Redistributions in binary form must reproduce the above copyright 24 * notice, this list of conditions and the following disclaimer in the 25 * documentation and/or other materials provided with the distribution. 26 * 3. All advertising materials mentioning features or use of this software 27 * must display the following acknowledgement: 28 * This product includes software developed by the University of 29 * California, Berkeley and its contributors. 30 * 4. Neither the name of the University nor the names of its contributors 31 * may be used to endorse or promote products derived from this software 32 * without specific prior written permission. 33 * 34 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 35 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 36 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 37 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 38 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 39 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 40 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 41 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 42 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 43 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 44 * SUCH DAMAGE. 45 * 46 * @(#)clock.c 8.1 (Berkeley) 6/11/93 47 */ 48 49 /* 50 * Clock driver. 51 */ 52 53 #include "sboot.h" 54 #include "clockreg.h" 55 56 #include <machine/prom.h> 57 #include "libsa.h" 58 59 static struct clockreg *clockreg = (struct clockreg *) CLOCK_ADDR; 60 61 /* 62 * Set up the system's time, given a `reasonable' time value. 63 */ 64 u_long time() 65 { 66 struct clockreg *cl = clockreg; 67 int sec, min, hour, day, mon, year; 68 69 cl->cl_csr |= CLK_READ; /* enable read (stop time) */ 70 sec = cl->cl_sec; 71 min = cl->cl_min; 72 hour = cl->cl_hour; 73 day = cl->cl_mday; 74 mon = cl->cl_month; 75 year = cl->cl_year; 76 cl->cl_csr &= ~CLK_READ; /* time wears on */ 77 return(chiptotime(sec, min, hour, day, mon, year)); 78 } 79