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377 lines
8.6 KiB
377 lines
8.6 KiB
// #pragma comment(exestr, "@(#) jxtime.c 1.1 95/09/28 15:41:57 nec")
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/*++
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Copyright (c) 1991 Microsoft Corporation
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Module Name:
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jxtime.c
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Abstract:
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This module implements the HAL set/query realtime clock routines for
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a MIPS R3000 or R4000 Jazz system.
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Author:
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David N. Cutler (davec) 5-May-1991
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Environment:
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Kernel mode
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Revision History:
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M0001 1994.9.9 kbnes!A.Kuriyama
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Modify for R94A
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HalpReadClockRegister() - R94A use RTC Index register except EISA NmiEnable
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register.
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HalpWriteClockRegister() - R94A use RTC Index register except EISA NmiEnable
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register.
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M0002 1994.10.8 kbnes!kuriyama(A)
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HalpReadClockRegister()
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-add specify Read Data register
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HalpWritelockRegister()
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-add specify Write Data register
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M0003 1994.10.14 kbnes!kuriyama(A)
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define error clear
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M0004 1994.12.19 kbnes!kuriyama(A)
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define miss fix
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--*/
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#include "halp.h"
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#include "jazzrtc.h"
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#include "eisa.h"
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//
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// Define forward referenced procedure prototypes.
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//
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UCHAR
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HalpReadClockRegister (
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UCHAR Register
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);
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VOID
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HalpWriteClockRegister (
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UCHAR Register,
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UCHAR Value
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);
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BOOLEAN
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HalQueryRealTimeClock (
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OUT PTIME_FIELDS TimeFields
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)
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/*++
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Routine Description:
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This routine queries the realtime clock.
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N.B. This routine is required to provide any synchronization necessary
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to query the realtime clock information.
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Arguments:
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TimeFields - Supplies a pointer to a time structure that receives
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the realtime clock information.
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Return Value:
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If the power to the realtime clock has not failed, then the time
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values are read from the realtime clock and a value of TRUE is
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returned. Otherwise, a value of FALSE is returned.
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--*/
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{
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UCHAR DataByte;
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KIRQL OldIrql;
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//
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// If the realtime clock battery is still functioning, then read
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// the realtime clock values, and return a function value of TRUE.
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// Otherwise, return a function value of FALSE.
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//
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KeRaiseIrql(HIGH_LEVEL, &OldIrql);
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DataByte = HalpReadClockRegister(RTC_CONTROL_REGISTERD);
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if (((PRTC_CONTROL_REGISTER_D)(&DataByte))->ValidTime == 1) {
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//
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// Wait until the realtime clock is not being updated.
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//
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do {
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DataByte = HalpReadClockRegister(RTC_CONTROL_REGISTERA);
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} while (((PRTC_CONTROL_REGISTER_A)(&DataByte))->UpdateInProgress == 1);
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//
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// Read the realtime clock values.
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//
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TimeFields->Year = 1980 + (CSHORT)HalpReadClockRegister(RTC_YEAR);
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TimeFields->Month = (CSHORT)HalpReadClockRegister(RTC_MONTH);
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TimeFields->Day = (CSHORT)HalpReadClockRegister(RTC_DAY_OF_MONTH);
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TimeFields->Weekday = (CSHORT)HalpReadClockRegister(RTC_DAY_OF_WEEK) - 1;
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TimeFields->Hour = (CSHORT)HalpReadClockRegister(RTC_HOUR);
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TimeFields->Minute = (CSHORT)HalpReadClockRegister(RTC_MINUTE);
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TimeFields->Second = (CSHORT)HalpReadClockRegister(RTC_SECOND);
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TimeFields->Milliseconds = 0;
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KeLowerIrql(OldIrql);
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return TRUE;
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} else {
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KeLowerIrql(OldIrql);
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return FALSE;
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}
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}
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BOOLEAN
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HalSetRealTimeClock (
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IN PTIME_FIELDS TimeFields
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)
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/*++
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Routine Description:
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This routine sets the realtime clock.
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N.B. This routine is required to provide any synchronization necessary
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to set the realtime clock information.
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Arguments:
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TimeFields - Supplies a pointer to a time structure that specifies the
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realtime clock information.
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Return Value:
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If the power to the realtime clock has not failed, then the time
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values are written to the realtime clock and a value of TRUE is
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returned. Otherwise, a value of FALSE is returned.
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--*/
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{
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UCHAR DataByte;
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KIRQL OldIrql;
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//
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// If the realtime clock battery is still functioning, then write
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// the realtime clock values, and return a function value of TRUE.
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// Otherwise, return a function value of FALSE.
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//
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KeRaiseIrql(HIGH_LEVEL, &OldIrql);
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DataByte = HalpReadClockRegister(RTC_CONTROL_REGISTERD);
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if (((PRTC_CONTROL_REGISTER_D)(&DataByte))->ValidTime == 1) {
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//
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// Set the realtime clock control to set the time.
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//
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DataByte = 0;
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((PRTC_CONTROL_REGISTER_B)(&DataByte))->HoursFormat = 1;
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((PRTC_CONTROL_REGISTER_B)(&DataByte))->DataMode = 1;
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((PRTC_CONTROL_REGISTER_B)(&DataByte))->SetTime = 1;
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HalpWriteClockRegister(RTC_CONTROL_REGISTERB, DataByte);
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//
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// Write the realtime clock values.
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//
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HalpWriteClockRegister(RTC_YEAR, (UCHAR)(TimeFields->Year - 1980));
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HalpWriteClockRegister(RTC_MONTH, (UCHAR)TimeFields->Month);
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HalpWriteClockRegister(RTC_DAY_OF_MONTH, (UCHAR)TimeFields->Day);
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HalpWriteClockRegister(RTC_DAY_OF_WEEK, (UCHAR)(TimeFields->Weekday + 1));
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HalpWriteClockRegister(RTC_HOUR, (UCHAR)TimeFields->Hour);
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HalpWriteClockRegister(RTC_MINUTE, (UCHAR)TimeFields->Minute);
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HalpWriteClockRegister(RTC_SECOND, (UCHAR)TimeFields->Second);
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//
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// Set the realtime clock control to update the time.
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//
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((PRTC_CONTROL_REGISTER_B)(&DataByte))->SetTime = 0;
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HalpWriteClockRegister(RTC_CONTROL_REGISTERB, DataByte);
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KeLowerIrql(OldIrql);
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return TRUE;
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} else {
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KeLowerIrql(OldIrql);
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return FALSE;
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}
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}
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UCHAR
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HalpReadClockRegister (
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UCHAR Register
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)
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/*++
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Routine Description:
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This routine reads the specified realtime clock register.
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Arguments:
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Register - Supplies the number of the register whose value is read.
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Return Value:
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The value of the register is returned as the function value.
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--*/
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{
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/* start M0001 */
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#if defined(_R94A_) /* M0003 */
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// Insert the realtime clock register number, and write the value back
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// to RTC Index register. This selects the realtime clock register
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// that is read.
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//
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WRITE_REGISTER_UCHAR(&((PRTC_REGISTERS) HalpRealTimeClockBase)->Index,
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Register);
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#else // _R94A_
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//
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// Insert the realtime clock register number, and write the value back
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// to the EISA NMI enable register. This selects the realtime clock register
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// that is read. Note this is a write only register and the EISA NMI
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// is always enabled.
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//
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//
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// TEMPTEMP Disable NMI's for now because this is causing machines in the
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// build lab to get NMI's during boot.
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//
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Register |= 0x80;
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WRITE_REGISTER_UCHAR(&((PEISA_CONTROL) HalpEisaControlBase)->NmiEnable,
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Register);
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#endif // _R94A_
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/* end M0001 */
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//
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// Read the realtime clock register value.
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//
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/* start M0002 */
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#if defined(_R94A_) // M0004
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return READ_REGISTER_UCHAR( &((PRTC_REGISTERS) HalpRealTimeClockBase)->Data);
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#else // _R94A_
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return READ_REGISTER_UCHAR((PUCHAR)HalpRealTimeClockBase);
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#endif // _R94A_
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/* end M0002 */
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}
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VOID
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HalpWriteClockRegister (
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UCHAR Register,
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UCHAR Value
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)
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/*++
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Routine Description:
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This routine writes the specified value to the specified realtime
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clock register.
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Arguments:
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Register - Supplies the number of the register whose value is written.
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Value - Supplies the value that is written to the specified register.
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Return Value:
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The value of the register is returned as the function value.
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--*/
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{
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/* start M0001 */
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#if defined(_R94A_)
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//
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// Insert the realtime clock register number, and write the value back
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// to RTC Index register. This selects the realtime clock
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// register that is written.
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//
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WRITE_REGISTER_UCHAR(&((PRTC_REGISTERS) HalpRealTimeClockBase)->Index,
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Register);
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#else // _R94A_
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//
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// Insert the realtime clock register number, and write the value back
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// to the EISA NMI enable register. This selects the realtime clock
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// register that is written. Note this is a write only register and
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// the EISA NMI is always enabled.
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//
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Register |= 0x80;
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WRITE_REGISTER_UCHAR(&((PEISA_CONTROL) HalpEisaControlBase)->NmiEnable,
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Register);
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#endif // _R94A_
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/* end M0001 */
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//
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// Write the realtime clock register value.
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//
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/* start M0002 */
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#if defined(_R94A_) // M0004
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WRITE_REGISTER_UCHAR( &((PRTC_REGISTERS) HalpRealTimeClockBase)->Data, Value);
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#else // _R94A_
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WRITE_REGISTER_UCHAR((PUCHAR)HalpRealTimeClockBase, Value);
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#endif // _R94A_
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/* end M0002 */
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return;
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}
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