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clockreg.h revision 1.5 
      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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed by Leo Weppelman.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 #ifndef _CLOCKREG_H
     34 #define _CLOCKREG_H
     35 #include "opt_mbtype.h"
     36 
     37 /*
     38  * Atari TT hardware:
     39  * Motorola MC146818A RealTimeClock
     40  */
     41 
     42 #define	RTC	((struct rtc *)AD_RTC)
     43 
     44 struct rtc {
     45 	volatile u_char	rtc_dat[4];
     46 };
     47 
     48 #ifdef _ATARIHW_
     49 #define rtc_regno	rtc_dat[1]	/* register nr. select		*/
     50 #define rtc_data	rtc_dat[3]	/* data register		*/
     51 #elif _MILANHW_
     52 #define rtc_regno	rtc_dat[0]	/* register nr. select		*/
     53 #define rtc_data	rtc_dat[1]	/* data register		*/
     54 #endif
     55 
     56 /*
     57  * Pull in general mc146818 definitions
     58  */
     59 #include <dev/ic/mc146818reg.h>
     60 
     61 /*
     62  * Some useful constants/macros
     63  */
     64 #define	is_leap(x)		(!(x % 4) && ((x % 100) || !(x % 1000)))
     65 #define	range_test(n, l, h)	((n) < (l) || (n) > (h))
     66 #define	SECS_DAY		86400L
     67 #define	SECS_HOUR		3600L
     68 #define	GEMSTARTOFTIME		((machineid & ATARI_CLKBROKEN) ? 1970 : 1968)
     69 #define	BSDSTARTOFTIME		1970
     70 #endif /* _CLOCKREG_H */
     71