149 lines
2.2 KiB
C
149 lines
2.2 KiB
C
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#if defined(JENSEN)
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/*++
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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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jxcalstl.c
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Abstract:
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This module implements the calibration of the stall execution HAL
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service, computes the count rate for the profile clock, and connects
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the clock and profile interrupts for an Alpha/Jensen system.
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Author:
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David N. Cutler (davec) 26-Apr-1991
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Jeff McLeman (mcleman) 09-Jun-1992
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Environment:
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Kernel mode only.
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Revision History:
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Jeff McLeman 09-Jun-92
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Make a Alpha/Jensen specific version of this file.
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--*/
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#include "halp.h"
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#include "stdio.h"
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#include "jnsndef.h"
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#include "jnsnrtc.h"
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BOOLEAN
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HalpCalibrateStall (
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VOID
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)
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/*++
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Routine Description:
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This function calibrates the stall execution HAL service and connects
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the clock and profile interrupts to the appropriate NT service routines.
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Arguments:
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None.
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Return Value:
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A value of TRUE is returned if the calibration is successfully
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completed. Otherwise a value of FALSE is returned.
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--*/
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{
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CHAR Buffer[128];
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ULONG Index;
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KIRQL OldIrql;
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//
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// Set the time increment value and connect the real clock interrupt
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// routine.
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//
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PCR->InterruptRoutine[CLOCK2_LEVEL] = HalpClockInterrupt;
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return TRUE;
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}
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VOID
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KeStallExecutionProcessor (
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IN ULONG MicroSeconds
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)
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/*++
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Routine Description:
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This function stalls execution of the current processor for the specified
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number of microseconds.
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Arguments:
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MicroSeconds - Supplies the number of microseconds that execution is to
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be stalled.
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Return Value:
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None.
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--*/
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{
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HalpStallExecution(MicroSeconds);
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return;
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}
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VOID
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HalpStallInterrupt (
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VOID
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)
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/*++
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Routine Description:
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This function serves as the stall calibration interrupt service
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routine. It is executed in response to system clock interrupts
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during the initialization of the HAL layer.
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Arguments:
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None.
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Return Value:
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None.
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--*/
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{
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UCHAR data;
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//
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// Acknowledge the clock interrupt.
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//
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HalpWriteVti( RTC_APORT, RTC_CONTROL_REGISTERC );
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data = HalpReadVti( RTC_DPORT );
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return;
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}
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#endif
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