sys/arch/atari/dev/clockreg.h

   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
  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 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 */