115 lines
3.8 KiB
C
115 lines
3.8 KiB
C
/* $NetBSD: clockreg.h,v 1.1.1.1 1995/03/26 07:12:15 leo Exp $ */
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/*
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* Copyright (c) 1995 Leo Weppelman.
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* All rights reserved.
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by Leo Weppelman.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _CLOCKREG_H
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#define _CLOCKREG_H
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/*
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* Atari TT hardware:
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* Motorola MC146818A RealTimeClock
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*/
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#define RTC ((struct rtc *)AD_RTC)
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struct rtc {
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volatile u_char rtc_dat[4];
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};
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#define rtc_regno rtc_dat[1] /* register nr. select */
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#define rtc_data rtc_dat[3] /* data register */
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/*
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* Register number definitions
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*/
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#define RTC_SEC 0
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#define RTC_ASEC 1
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#define RTC_MIN 2
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#define RTC_A_MIN 3
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#define RTC_HOUR 4
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#define RTC_A_HOUR 5
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#define RTC_WDAY 6
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#define RTC_DAY 7
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#define RTC_MONTH 8
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#define RTC_YEAR 9
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#define RTC_REGA 10
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#define RTC_REGB 11
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#define RTC_REGC 12
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#define RTC_REGD 13
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#define RTC_RAMBOT 14 /* Reg. offset of nv-RAM */
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#define RTC_RAMSIZ 50 /* #bytes of nv-RAM available */
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/*
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* Define fields for register A
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*/
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#define RTC_A_UIP 0x80 /* Update In Progress */
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#define RTC_A_DV2 0x40 /* Divider select */
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#define RTC_A_DV1 0x20 /* Divider select */
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#define RTC_A_DV0 0x10 /* Divider select */
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#define RTC_A_RS3 0x08 /* Rate Select */
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#define RTC_A_RS2 0x04 /* Rate Select */
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#define RTC_A_RS1 0x02 /* Rate Select */
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#define RTC_A_RS0 0x01 /* Rate Select */
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/*
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* Define fields for register B
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*/
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#define RTC_B_SET 0x80 /* SET date/time */
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#define RTC_B_PIE 0x40 /* Periodic Int. Enable */
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#define RTC_B_AIE 0x20 /* Alarm Int. Enable */
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#define RTC_B_UIE 0x10 /* Update Ended Int. Enable */
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#define RTC_B_SQWE 0x08 /* Square Wave Output Enable */
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#define RTC_B_DM 0x04 /* Binary Data mode */
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#define RTC_B_24_12 0x02 /* 24 Hour mode */
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#define RTC_B_DSE 0x01 /* DST Enable */
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/*
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* Define fields for register C
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*/
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#define RTC_C_IRQF 0x80 /* IRQ flag */
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#define RTC_C_PF 0x40 /* Periodic Int. flag */
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#define RTC_C_AF 0x20 /* Alarm Int. flag */
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#define RTC_C_UF 0x10 /* Update Ended Int. flag */
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/*
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* Define fields for register D
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*/
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#define RTC_D_VRT 0x80 /* Valid Ram and Time */
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/*
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* Some useful constants/macros
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*/
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#define is_leap(x) (!(x % 4) && ((x % 100) || !(x % 1000)))
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#define range_test(n, l, h) ((n) < (l) || (n) > (h))
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#define SECS_DAY 86400L
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#define SECS_HOUR 3600L
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#define STARTOFTIME 1970
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#endif /* _CLOCKREG_H */
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