rtc.h revision 331521
1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 4. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)rtc.h 7.1 (Berkeley) 5/12/91 35 * $FreeBSD: stable/11/sys/isa/rtc.h 331521 2018-03-25 01:52:38Z ian $ 36 */ 37 38#ifndef _I386_ISA_RTC_H_ 39#define _I386_ISA_RTC_H_ 1 40 41/* 42 * MC146818 RTC Register locations 43 */ 44 45#define RTC_SEC 0x00 /* seconds */ 46#define RTC_SECALRM 0x01 /* seconds alarm */ 47#define RTC_MIN 0x02 /* minutes */ 48#define RTC_MINALRM 0x03 /* minutes alarm */ 49#define RTC_HRS 0x04 /* hours */ 50#define RTC_HRSALRM 0x05 /* hours alarm */ 51#define RTC_WDAY 0x06 /* week day */ 52#define RTC_DAY 0x07 /* day of month */ 53#define RTC_MONTH 0x08 /* month of year */ 54#define RTC_YEAR 0x09 /* month of year */ 55 56#define RTC_STATUSA 0x0a /* status register A */ 57#define RTCSA_TUP 0x80 /* time update, don't look now */ 58#define RTCSA_RESET 0x70 /* reset divider */ 59#define RTCSA_DIVIDER 0x20 /* divider correct for 32768 Hz */ 60#define RTCSA_8192 0x03 /* 8192 Hz interrupt */ 61#define RTCSA_4096 0x04 62#define RTCSA_2048 0x05 63#define RTCSA_1024 0x06 /* default for profiling */ 64#define RTCSA_PROF RTCSA_1024 65#define RTC_PROFRATE 1024 66#define RTCSA_512 0x07 67#define RTCSA_256 0x08 68#define RTCSA_128 0x09 69#define RTCSA_NOPROF RTCSA_128 70#define RTC_NOPROFRATE 128 71#define RTCSA_64 0x0a 72#define RTCSA_32 0x0b /* 32 Hz interrupt */ 73 74#define RTC_STATUSB 0x0b /* status register B */ 75#define RTCSB_DST 0x01 /* USA Daylight Savings Time enable */ 76#define RTCSB_24HR 0x02 /* 0 = 12 hours, 1 = 24 hours */ 77#define RTCSB_BCD 0x04 /* 0 = BCD, 1 = Binary coded time */ 78#define RTCSB_SQWE 0x08 /* 1 = output sqare wave at SQW pin */ 79#define RTCSB_UINTR 0x10 /* 1 = enable update-ended interrupt */ 80#define RTCSB_AINTR 0x20 /* 1 = enable alarm interrupt */ 81#define RTCSB_PINTR 0x40 /* 1 = enable periodic clock interrupt */ 82#define RTCSB_HALT 0x80 /* stop clock updates */ 83 84#define RTC_INTR 0x0c /* status register C (R) interrupt source */ 85#define RTCIR_UPDATE 0x10 /* update intr */ 86#define RTCIR_ALARM 0x20 /* alarm intr */ 87#define RTCIR_PERIOD 0x40 /* periodic intr */ 88#define RTCIR_INT 0x80 /* interrupt output signal */ 89 90#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */ 91#define RTCSD_PWR 0x80 /* clock power OK */ 92 93#define RTC_DIAG 0x0e /* status register E - bios diagnostic */ 94#define RTCDG_BITS "\020\010clock_battery\007ROM_cksum\006config_unit\005memory_size\004fixed_disk\003invalid_time" 95 96#define RTC_RESET 0x0f /* status register F - reset code byte */ 97#define RTCRS_RST 0x00 /* normal reset */ 98#define RTCRS_LOAD 0x04 /* load system */ 99 100#define RTC_FDISKETTE 0x10 /* diskette drive type in upper/lower nibble */ 101#define RTCFDT_NONE 0 /* none present */ 102#define RTCFDT_360K 0x10 /* 360K */ 103#define RTCFDT_12M 0x20 /* 1.2M */ 104#define RTCFDT_720K 0x30 /* 720K */ 105#define RTCFDT_144M 0x40 /* 1.44M */ 106#define RTCFDT_288M_1 0x50 /* 2.88M, some BIOSes */ 107#define RTCFDT_288M 0x60 /* 2.88M */ 108 109#define RTC_BASELO 0x15 /* low byte of basemem size */ 110#define RTC_BASEHI 0x16 /* high byte of basemem size */ 111#define RTC_EXTLO 0x17 /* low byte of extended mem size */ 112#define RTC_EXTHI 0x18 /* low byte of extended mem size */ 113 114#define RTC_CENTURY 0x32 /* current century */ 115 116#ifdef _KERNEL 117extern struct mtx atrtc_time_lock; 118extern int atrtcclock_disable; 119int rtcin(int reg); 120void atrtc_restore(void); 121void writertc(int reg, u_char val); 122#endif 123 124#endif /* _I386_ISA_RTC_H_ */ 125