Windows NT 4.0 source code leak
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/*++
Copyright (c) 1991 Microsoft Corporation
Module Name:
jxsysint.c
Abstract:
This module implements the HAL enable/disable system interrupt, and request interprocessor interrupt routines for a MIPS R3000 or R4000 Jazz system.
Author:
David N. Cutler (davec) 6-May-1991
Environment:
Kernel mode
Revision History:
--*/
#include "halp.h"
//
// Define reference to the builtin device interrupt enables.
//
extern USHORT HalpBuiltinInterruptEnable;
VOID HalDisableSystemInterrupt ( IN ULONG Vector, IN KIRQL Irql )
/*++
Routine Description:
This routine disables the specified system interrupt.
Arguments:
Vector - Supplies the vector of the system interrupt that is disabled.
Irql - Supplies the IRQL of the interrupting source.
Return Value:
None.
--*/
{
KIRQL OldIrql;
//
// Raise IRQL to the highest level.
//
KeRaiseIrql(HIGH_LEVEL, &OldIrql);
//
// If the vector number is within the range of the EISA interrupts, then
// disable the EISA interrrupt.
//
if (Vector >= EISA_VECTORS && Vector < EISA_VECTORS + MAXIMUM_EISA_VECTOR && Irql == EISA_DEVICE_LEVEL) { HalpDisableEisaInterrupt(Vector); }
//
// Lower IRQL to the previous level.
//
KeLowerIrql(OldIrql); return; }
BOOLEAN HalEnableSystemInterrupt ( IN ULONG Vector, IN KIRQL Irql, IN KINTERRUPT_MODE InterruptMode )
/*++
Routine Description:
This routine enables the specified system interrupt.
Arguments:
Vector - Supplies the vector of the system interrupt that is enabled.
Irql - Supplies the IRQL of the interrupting source.
InterruptMode - Supplies the mode of the interrupt; LevelSensitive or Latched.
Return Value:
TRUE if the system interrupt was enabled
--*/
{
KIRQL OldIrql;
//
// Raise IRQL to the highest level.
//
KeRaiseIrql(HIGH_LEVEL, &OldIrql);
//
// If the vector number is within the range of the EISA interrupts, then
// enable the EISA interrrupt and set the Level/Edge register.
//
if (Vector >= EISA_VECTORS && Vector < EISA_VECTORS + MAXIMUM_EISA_VECTOR && Irql == EISA_DEVICE_LEVEL) { HalpEnableEisaInterrupt( Vector, InterruptMode); }
//
// Lower IRQL to the previous level.
//
KeLowerIrql(OldIrql); return TRUE; }
ULONG HalGetInterruptVector( IN INTERFACE_TYPE InterfaceType, IN ULONG BusNumber, IN ULONG BusInterruptLevel, IN ULONG BusInterruptVector, OUT PKIRQL Irql, OUT PKAFFINITY Affinity )
/*++
Routine Description:
This functionr returns the system interrupt vector and IRQL level corresponding to the specified bus interrupt level and/or vector. The system interrupt vector and IRQL are suitable for use in a subsequent call to KeInitializeInterrupt.
Arguments:
InterfaceType - Supplies the type of bus which the vector is for.
BusNumber - Supplies the bus number for the device.
BusInterruptLevel - Supplies the bus specific interrupt level.
BusInterruptVector - Supplies the bus specific interrupt vector.
Irql - Returns the system request priority.
Affinity - Returns the affinity for the requested vector
Return Value:
Returns the system interrupt vector corresponding to the specified device.
--*/
{ *Affinity = 1;
//
// The BusLogic 445 VESA SCSI Host Adapter will not work unless an InterfaceType of
// Eisa is also allowed here.
//
//
// if (InterfaceType != Isa) {
//
if (InterfaceType != Isa && InterfaceType != Eisa) {
//
// Not on this system return nothing.
//
*Affinity = 0; *Irql = 0; return(0);
}
//
// Jazz only has one I/O bus which is an EISA, so the bus number and the
// bus interrupt vector are unused.
//
// The IRQL level is always equal to the EISA level.
//
*Irql = EISA_DEVICE_LEVEL;
//
// Bus interrupt level 2 is actually mapped to bus level 9 in the Eisa
// hardware.
//
if (BusInterruptLevel == 2) { BusInterruptLevel = 9; }
//
// The vector is equal to the specified bus level plus the EISA_VECTOR.
//
return(BusInterruptLevel + EISA_VECTORS);
}
VOID HalRequestIpi ( IN ULONG Mask )
/*++
Routine Description:
This routine requests an interprocessor interrupt on a set of processors.
Arguments:
Mask - Supplies the set of processors that are sent an interprocessor interrupt.
Return Value:
None.
--*/
{
return; }
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