1 /* $NetBSD: clockreg.h,v 1.7 2014/11/17 02:15:48 christos 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 39 struct 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 range_test(n, l, h) ((n) < (l) || (n) > (h)) 60 #define GEMSTARTOFTIME ((machineid & ATARI_CLKBROKEN) ? 1970 : 1968) 61 #endif /* _CLOCKREG_H */ 62