1/* $NetBSD: clockreg.h,v 1.5 2001/04/24 06:27:58 leo Exp $ */ 2 3/* 4 * Copyright (c) 1995 Leo Weppelman. 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 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28#ifndef _CLOCKREG_H 29#define _CLOCKREG_H 30#include "opt_mbtype.h" 31 32/* 33 * Atari TT hardware: 34 * Motorola MC146818A RealTimeClock 35 */ 36 37#define RTC ((struct rtc *)AD_RTC) 38 39struct rtc { 40 volatile u_char rtc_dat[4]; 41}; 42 43#ifdef _ATARIHW_ 44#define rtc_regno rtc_dat[1] /* register nr. select */ 45#define rtc_data rtc_dat[3] /* data register */ 46#elif _MILANHW_ 47#define rtc_regno rtc_dat[0] /* register nr. select */ 48#define rtc_data rtc_dat[1] /* data register */ 49#endif 50 51/* 52 * Pull in general mc146818 definitions 53 */ 54#include <dev/ic/mc146818reg.h> 55 56/* 57 * Some useful constants/macros 58 */ 59#define is_leap(x) (!(x % 4) && ((x % 100) || !(x % 1000))) 60#define range_test(n, l, h) ((n) < (l) || (n) > (h)) 61#define SECS_DAY 86400L 62#define SECS_HOUR 3600L 63#define GEMSTARTOFTIME ((machineid & ATARI_CLKBROKEN) ? 1970 : 1968) 64#define BSDSTARTOFTIME 1970 65#endif /* _CLOCKREG_H */ 66