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