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/* $OpenBSD: clockreg.h,v 1.2 1998/12/15 05:52:30 smurph Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This software was developed by the Computer Systems Engineering group
* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
* contributed to Berkeley.
*
* All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Lawrence Berkeley Laboratory.
*
* 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 the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``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 REGENTS OR CONTRIBUTORS 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.
*
* @(#)clockreg.h 8.1 (Berkeley) 6/11/93
*/
#include <machine/idprom.h>
/*
* Sun-4/Sun-4c/Sun-4m clock Mostek TOD clock.
*/
/*
* Mostek MK48T02 clock.
*
* The clock includes 2040 bytes of RAM, the last 32 of which serve to
* identify the kind of Sun 4c this is.
*
* or, the Mostek MK48T08 clock.
*
* This is used in the Sun 4m machines. It is identical to the MK48T02,
* except for being 8K in size. The following structure, then, describes
* the last 2K of it's 8K address space. We simply ignore the first 6K..
*/
struct clockreg {
char cl_nvram[2008]; /* `free' nonvolatile memory */
struct idprom cl_idprom; /* `id prom' */
volatile u_char cl_csr; /* control register */
volatile u_char cl_sec; /* seconds (0..59; BCD) */
volatile u_char cl_min; /* minutes (0..59; BCD) */
volatile u_char cl_hour; /* hour (0..23; BCD) */
volatile u_char cl_wday; /* weekday (1..7) */
volatile u_char cl_mday; /* day in month (1..31; BCD) */
volatile u_char cl_month; /* month (1..12; BCD) */
volatile u_char cl_year; /* year (0..99; BCD) */
};
/* bits in cl_csr */
#define CLK_WRITE 0x80 /* want to write */
#define CLK_READ 0x40 /* want to read (freeze clock) */
#define CLK_MK48T08_OFF 6*1024 /* struct clockreg is 6K forward */
struct clockreg *clockreg;
/*
* Sun chose the year `68' as their base count, so that
* cl_year==0 means 1968.
*/
#define YEAR0 68
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