NetBSD/sys/arch/i386/isa/rtc.h

/*	$NetBSD: rtc.h,v 1.7 1994/10/27 04:18:10 cgd Exp $	*/

/*-
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * 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.
 *
 *	@(#)rtc.h	7.1 (Berkeley) 5/12/91
 */
/* 
 * Mach Operating System
 * Copyright (c) 1991,1990,1989 Carnegie Mellon University
 * All Rights Reserved.
 * 
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 * 
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 * 
 * Carnegie Mellon requests users of this software to return to
 * 
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 * 
 * any improvements or extensions that they make and grant Carnegie Mellon
 * the rights to redistribute these changes.
 */
/*
  Copyright 1988, 1989 by Intel Corporation, Santa Clara, California.

		All Rights Reserved

Permission to use, copy, modify, and distribute this software and
its documentation for any purpose and without fee is hereby
granted, provided that the above copyright notice appears in all
copies and that both the copyright notice and this permission notice
appear in supporting documentation, and that the name of Intel
not be used in advertising or publicity pertaining to distribution
of the software without specific, written prior permission.

INTEL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS,
IN NO EVENT SHALL INTEL BE LIABLE FOR ANY SPECIAL, INDIRECT, OR
CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
LOSS OF USE, DATA OR PROFITS, WHETHER IN ACTION OF CONTRACT,
NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
 * RTC/CMOS Register locations
 */
/*
 * Register A definitions
 */
#define RTC_STATUSA	0x0a	/* register A address */
#define RTC_UIP		0x80	/* Update in progress bit */
#define RTC_DIV0	0x00	/* Time base of 4.194304 MHz */
#define RTC_DIV1	0x10	/* Time base of 1.048576 MHz */
#define RTC_DIV2	0x20	/* Time base of 32.768 KHz */
#define RTC_RATE6	0x06	/* interrupt rate of 976.562 */

/*
 * Register B definitions
 */
#define RTC_STATUSB	0x0b	/* register B address */
#define RTC_SET		0x80	/* stop updates for time set */
#define RTC_PIE		0x40	/* Periodic interrupt enable */
#define RTC_AIE		0x20	/* Alarm interrupt enable */
#define RTC_UIE		0x10	/* Update ended interrupt enable */
#define RTC_SQWE	0x08	/* Square wave enable */
#define RTC_DM		0x04	/* Date mode, 1 = binary, 0 = BCD */
#define RTC_HM		0x02	/* hour mode, 1 = 24 hour, 0 = 12 hour */
#define RTC_DSE		0x01	/* Daylight savings enable */

/* 
 * Register C definitions
 */
#define RTC_INTR	0x0c	/* register C address */
#define RTC_IRQF	0x80	/* IRQ flag */
#define RTC_PF		0x40	/* PF flag bit */
#define RTC_AF		0x20	/* AF flag bit */
#define RTC_UF		0x10	/* UF flag bit */

/*
 * Register D definitions
 */
#define RTC_D		0x0d	/* register D address */
#define RTC_VRT		0x80	/* Valid RAM and time bit */

#define RTC_NREG	0x0e	/* number of RTC registers */
#define RTC_NREGP	0x0a	/* number of RTC registers to set time */

/*
 * These are generic CMOS locations, but we call then RTC anyway...
 */
#define RTC_DIAG	0x0e	/* status register E - bios diagnostic */
#define RTCDG_BITS	"\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time"

#define RTC_RESET	0x0f	/* status register F - reset code byte */
#define	 RTCRS_RST	 0x00		/* normal reset */
#define	 RTCRS_LOAD	 0x04		/* load system */

#define RTC_FDISKETTE	0x10	/* diskette drive type in upper/lower nibble */
#define	 RTCFDT_NONE	 0		/* none present */
#define	 RTCFDT_360K	 0x10		/* 360K */
#define	 RTCFDT_12M	 0x20		/* 1.2M */
#define	 RTCFDT_720K	 0x30		/* 720K */
#define	 RTCFDT_144M	 0x40		/* 1.44M */
#define	 RTCFDT_TYPE5	 0x50		/* 2.88M, presumably */
#define	 RTCFDT_TYPE6	 0x60		/* 2.88M */

#define RTC_BASELO	0x15	/* low byte of basemem size */
#define RTC_BASEHI	0x16	/* high byte of basemem size */
#define RTC_EXTLO	0x17	/* low byte of extended mem size */
#define RTC_EXTHI	0x18	/* low byte of extended mem size */

#define RTC_CENTURY	0x32	/* current century - please increment in Dec99*/