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      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