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/* $NetBSD: clockreg.h,v 1.3 1995/06/28 04:30:40 cgd Exp $ */
/*
* Copyright (c) 1995 Leo Weppelman.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Leo Weppelman.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _CLOCKREG_H
#define _CLOCKREG_H
/*
* Atari TT hardware:
* Motorola MC146818A RealTimeClock
*/
#define RTC ((struct rtc *)AD_RTC)
struct rtc {
volatile u_char rtc_dat[4];
};
#define rtc_regno rtc_dat[1] /* register nr. select */
#define rtc_data rtc_dat[3] /* data register */
/*
* Pull in general mc146818 definitions
*/
#include <dev/ic/mc146818reg.h>
__inline__ u_int mc146818_read(rtc, regno)
void *rtc;
u_int regno;
{
((struct rtc *)rtc)->rtc_regno = regno;
return(((struct rtc *)rtc)->rtc_data & 0377);
}
__inline__ void mc146818_write(rtc, regno, value)
void *rtc;
u_int regno, value;
{
((struct rtc *)rtc)->rtc_regno = regno;
((struct rtc *)rtc)->rtc_data = value;
}
/*
* Some useful constants/macros
*/
#define is_leap(x) (!(x % 4) && ((x % 100) || !(x % 1000)))
#define range_test(n, l, h) ((n) < (l) || (n) > (h))
#define SECS_DAY 86400L
#define SECS_HOUR 3600L
#define GEMSTARTOFTIME ((machineid & ATARI_CLKBROKEN) ? 1970 : 1968)
#define BSDSTARTOFTIME 1970
#endif /* _CLOCKREG_H */
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