rtc.h revision 37556
1/*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)rtc.h 7.1 (Berkeley) 5/12/91 37 * $Id: rtc.h,v 1.10 1997/02/22 09:37:03 peter Exp $ 38 */ 39 40#ifndef _I386_ISA_RTC_H_ 41#define _I386_ISA_RTC_H_ 1 42 43/* 44 * MC146818 RTC Register locations 45 */ 46 47#define RTC_SEC 0x00 /* seconds */ 48#define RTC_SECALRM 0x01 /* seconds alarm */ 49#define RTC_MIN 0x02 /* minutes */ 50#define RTC_MINALRM 0x03 /* minutes alarm */ 51#define RTC_HRS 0x04 /* hours */ 52#define RTC_HRSALRM 0x05 /* hours alarm */ 53#define RTC_WDAY 0x06 /* week day */ 54#define RTC_DAY 0x07 /* day of month */ 55#define RTC_MONTH 0x08 /* month of year */ 56#define RTC_YEAR 0x09 /* month of year */ 57 58#define RTC_STATUSA 0x0a /* status register A */ 59#define RTCSA_TUP 0x80 /* time update, don't look now */ 60#define RTCSA_RESET 0x70 /* reset divider */ 61#define RTCSA_DIVIDER 0x20 /* divider correct for 32768 Hz */ 62#define RTCSA_8192 0x03 /* 8192 Hz interrupt */ 63#define RTCSA_4096 0x04 64#define RTCSA_2048 0x05 65#define RTCSA_1024 0x06 /* default for profiling */ 66#define RTCSA_PROF RTCSA_1024 67#define RTC_PROFRATE 1024 68#define RTCSA_512 0x07 69#define RTCSA_256 0x08 70#define RTCSA_128 0x09 71#define RTCSA_NOPROF RTCSA_128 72#define RTC_NOPROFRATE 128 73#define RTCSA_64 0x0a 74#define RTCSA_32 0x0b /* 32 Hz interrupt */ 75 76#define RTC_STATUSB 0x0b /* status register B */ 77#define RTCSB_DST 0x01 /* USA Daylight Savings Time enable */ 78#define RTCSB_24HR 0x02 /* 0 = 12 hours, 1 = 24 hours */ 79#define RTCSB_BCD 0x04 /* 0 = BCD, 1 = Binary coded time */ 80#define RTCSB_SQWE 0x08 /* 1 = output sqare wave at SQW pin */ 81#define RTCSB_UINTR 0x10 /* 1 = enable update-ended interrupt */ 82#define RTCSB_AINTR 0x20 /* 1 = enable alarm interrupt */ 83#define RTCSB_PINTR 0x40 /* 1 = enable periodic clock interrupt */ 84#define RTCSB_HALT 0x80 /* stop clock updates */ 85 86#define RTC_INTR 0x0c /* status register C (R) interrupt source */ 87#define RTCIR_UPDATE 0x10 /* update intr */ 88#define RTCIR_ALARM 0x20 /* alarm intr */ 89#define RTCIR_PERIOD 0x40 /* periodic intr */ 90#define RTCIR_INT 0x80 /* interrupt output signal */ 91 92#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */ 93#define RTCSD_PWR 0x80 /* clock power OK */ 94 95#define RTC_DIAG 0x0e /* status register E - bios diagnostic */ 96#define RTCDG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time" 97 98#define RTC_RESET 0x0f /* status register F - reset code byte */ 99#define RTCRS_RST 0x00 /* normal reset */ 100#define RTCRS_LOAD 0x04 /* load system */ 101 102#define RTC_FDISKETTE 0x10 /* diskette drive type in upper/lower nibble */ 103#define RTCFDT_NONE 0 /* none present */ 104#define RTCFDT_360K 0x10 /* 360K */ 105#define RTCFDT_12M 0x20 /* 1.2M */ 106#define RTCFDT_720K 0x30 /* 720K */ 107#define RTCFDT_144M 0x40 /* 1.44M */ 108#define RTCFDT_288M_1 0x50 /* 2.88M, some BIOSes */ 109#define RTCFDT_288M 0x60 /* 2.88M */ 110 111#define RTC_BASELO 0x15 /* low byte of basemem size */ 112#define RTC_BASEHI 0x16 /* high byte of basemem size */ 113#define RTC_EXTLO 0x17 /* low byte of extended mem size */ 114#define RTC_EXTHI 0x18 /* low byte of extended mem size */ 115 116#define RTC_CENTURY 0x32 /* current century */ 117#endif /* _I386_ISA_RTC_H_ */ 118