169 lines
4.0 KiB
C
169 lines
4.0 KiB
C
/*++
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Copyright (c) 1991 Microsoft Corporation
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Copyright (c) 1992 Digital Equipment Corporation
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Module Name:
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jnsnrtc.h
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Abstract:
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This module is the header file that describes hardware structure
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for the Toy clock in the 82C106 combo chip on Jensen
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Author:
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David N. Cutler (davec) 3-May-1991
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Jeff McLeman (mcleman) 4-Jun-1992
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Revision History:
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13-Jul-1992 Jeff McLeman
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Add port offsets for use with VTI access routines.
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4-Jun-1992 Jeff McLeman
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Adapt module to Jensen specific
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*/
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#ifndef _JNSNRTC_
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#define _JNSNRTC_
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// Define Realtime Clock register numbers.
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#define RTC_SECOND 0 // second of minute [0..59]
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#define RTC_SECOND_ALARM 1 // seconds to alarm
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#define RTC_MINUTE 2 // minute of hour [0..59]
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#define RTC_MINUTE_ALARM 3 // minutes to alarm
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#define RTC_HOUR 4 // hour of day [0..23]
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#define RTC_HOUR_ALARM 5 // hours to alarm
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#define RTC_DAY_OF_WEEK 6 // day of week [1..7]
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#define RTC_DAY_OF_MONTH 7 // day of month [1..31]
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#define RTC_MONTH 8 // month of year [1..12]
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#define RTC_YEAR 9 // year [00..99]
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#define RTC_CONTROL_REGISTERA 10 // control register A
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#define RTC_CONTROL_REGISTERB 11 // control register B
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#define RTC_CONTROL_REGISTERC 12 // control register C
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#define RTC_CONTROL_REGISTERD 13 // control register D
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// The RTC NVRAM byte addresses are 0x0e -- 0x4f.
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// Addresses 0x0E -- 0x3F are reserved for use by VMS/OSF.
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#define RTC_RAM_NT_FLAGS0 0x40 // NT firmware flag set #0
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#define RTC_RAM_CONSOLE_SELECTION 0x4f // VMS/OSF/NT boot selection
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// Define port registers for access with the VTI access
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// routines
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#define RTC_APORT 0x170
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#define RTC_DPORT 0x171
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#ifndef _LANGUAGE_ASSEMBLY
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// Define Control Register A structure.
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typedef struct _RTC_CONTROL_REGISTER_A {
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UCHAR RateSelect : 4;
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UCHAR TimebaseDivisor : 3;
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UCHAR UpdateInProgress : 1;
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} RTC_CONTROL_REGISTER_A, *PRTC_CONTROL_REGISTER_A;
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// Define Control Register B structure.
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typedef struct _RTC_CONTROL_REGISTER_B {
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UCHAR DayLightSavingsEnable : 1;
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UCHAR HoursFormat : 1;
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UCHAR DataMode : 1;
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UCHAR SquareWaveEnable : 1;
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UCHAR UpdateInterruptEnable : 1;
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UCHAR AlarmInterruptEnable : 1;
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UCHAR TimerInterruptEnable : 1;
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UCHAR SetTime : 1;
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} RTC_CONTROL_REGISTER_B, *PRTC_CONTROL_REGISTER_B;
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// Define Control Register C structure.
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typedef struct _RTC_CONTROL_REGISTER_C {
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UCHAR Fill : 4;
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UCHAR UpdateInterruptFlag : 1;
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UCHAR AlarmInterruptFlag : 1;
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UCHAR TimeInterruptFlag : 1;
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UCHAR InterruptRequest : 1;
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} RTC_CONTROL_REGISTER_C, *PRTC_CONTROL_REGISTER_C;
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// Define Control Register D structure.
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typedef struct _RTC_CONTROL_REGISTER_D {
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UCHAR Fill : 7;
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UCHAR ValidTime : 1;
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} RTC_CONTROL_REGISTER_D, *PRTC_CONTROL_REGISTER_D;
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// Definitions for NT area of NVRAM
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typedef struct _RTC_RAM_NT_FLAGS_0 {
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UCHAR Fill : 7;
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UCHAR AutoRunECU : 1;
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} RTC_RAM_NT_FLAGS_0, *PRTC_RAM_NT_FLAGS_0;
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#endif //_LANGUAGE_ASSEMBLY
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// Values for RTC_RAM_CONSOLE_SELECTION
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#define RTC_RAM_CONSOLE_SELECTION_NT 1
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#define RTC_RAM_CONSOLE_SELECTION_VMS 2
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#define RTC_RAM_CONSOLE_SELECTION_OSF 3
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// Define initialization values for Jensen interval timer
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// There are four different rates that are used under NT
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// (see page 9-8 of KN121 System Module Programmer's Reference)
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// .976562 ms
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// 1.953125 ms
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// 3.90625 ms
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// 7.8125 ms
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#define RTC_RATE_SELECT1 6
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#define RTC_RATE_SELECT2 7
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#define RTC_RATE_SELECT3 8
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#define RTC_RATE_SELECT4 9
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// note that rates 1-3 have some rounding error,
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// since they are not expressible in even 100ns units
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#define RTC_PERIOD_IN_CLUNKS1 9766
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#define RTC_PERIOD_IN_CLUNKS2 19531
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#define RTC_PERIOD_IN_CLUNKS3 39063
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#define RTC_PERIOD_IN_CLUNKS4 78125
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// Defaults
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#define MINIMUM_INCREMENT RTC_PERIOD_IN_CLUNKS1
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#define MAXIMUM_INCREMENT RTC_PERIOD_IN_CLUNKS4
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#define MAXIMUM_RATE_SELECT RTC_RATE_SELECT4
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#endif // _JNSNRTC_
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