73 lines
2.9 KiB
C
73 lines
2.9 KiB
C
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Copyright (C) 2022 Intel Corporation.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: @(#)rtc.h 7.1 (Berkeley) 5/12/91
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* $FreeBSD$
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*/
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#ifndef _MC146818_RTC_H_
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#define _MC146818_RTC_H_
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/*
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* MC146818 RTC Register locations
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*/
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#define RTC_SEC 0x00 /* seconds */
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#define RTC_SECALRM 0x01 /* seconds alarm */
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#define RTC_MIN 0x02 /* minutes */
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#define RTC_MINALRM 0x03 /* minutes alarm */
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#define RTC_HRS 0x04 /* hours */
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#define RTC_HRSALRM 0x05 /* hours alarm */
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#define RTC_WDAY 0x06 /* week day */
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#define RTC_DAY 0x07 /* day of month */
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#define RTC_MONTH 0x08 /* month of year */
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#define RTC_YEAR 0x09 /* year in century*/
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#define RTC_CENTURY 0x32 /* century */
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#define RTC_STATUSA 0x0a /* status register A */
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#define RTCSA_TUP 0x80U /* time update, don't look now */
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#define RTC_STATUSB 0x0b /* status register B */
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#define RTCSB_24HR 0x02U /* 0 = 12 hours, 1 = 24 hours */
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#define RTCSB_BCD 0x04U /* 0 = BCD, 1 = Binary coded time */
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#define RTCSB_AINTR 0x20U /* 1 = enable alarm interrupt */
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#define RTCSB_HALT 0x80U /* stop clock updates */
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#define RTC_INTR 0x0c /* status register C (R) interrupt source */
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#define RTCIR_ALARM 0x20U /* alarm intr */
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#define RTCIR_INT 0x80U /* interrupt output signal */
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#define RTC_STATUSD 0x0d /* status register D (R) Lost Power */
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#endif /* _MC146818_RTC_H_ */
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