sys/arch/mvme68k/stand/sboot/clockreg.h

   1 /*      $NetBSD: clockreg.h,v 1.1.1.1.70.3 2004/09/21 13:19:17 skrll Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)clockreg.h  8.1 (Berkeley) 6/11/93
  41  */
  42
  43 /*
  44  * Mostek MK48T02 clock.
  45  */
  46 struct clockreg {
  47         volatile u_char cl_csr;         /* control register */
  48         volatile u_char cl_sec;         /* seconds (0..59; BCD) */
  49         volatile u_char cl_min;         /* minutes (0..59; BCD) */
  50         volatile u_char cl_hour;        /* hour (0..23; BCD) */
  51         volatile u_char cl_wday;        /* weekday (1..7) */
  52         volatile u_char cl_mday;        /* day in month (1..31; BCD) */
  53         volatile u_char cl_month;       /* month (1..12; BCD) */
  54         volatile u_char cl_year;        /* year (0..99; BCD) */
  55 };
  56
  57 /* bits in cl_csr */
  58 #define CLK_WRITE       0x80            /* want to write */
  59 #define CLK_READ        0x40            /* want to read (freeze clock) */
  60
  61 /*
  62  * Sun chose the year `68' as their base count, so that
  63  * cl_year==0 means 1968.
  64  */
  65 #define YEAR0   68