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      1 /*	$NetBSD: clockreg.h,v 1.3 2005/12/11 12:18:19 christos 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
     66