124 lines
2.7 KiB
ArmAsm
124 lines
2.7 KiB
ArmAsm
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// TITLE("PCI/ISA Interrupt Handler")
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//++
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//
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// Copyright (c) 1994 Digital Equipment Corporation
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//
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// Module Name:
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//
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// ebintr.s
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//
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// Abstract:
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//
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// This module implements first level interrupt handlers for Mustang & EB66
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//
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// During Phase 0 initialization, the appropriate platform-dependent handler
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// is connected.
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//
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// Author:
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//
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// Joe Notarangelo 08-Jul-1993
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//
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// Environment:
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//
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// Kernel mode only.
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//
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// Revision History:
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//
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// 07-Feb-1994 Eric Rehm
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// Make this module platform-dependent.
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//--
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#include "halalpha.h"
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SBTTL("EB66 PCI Interrupt Handler")
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//++
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//
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// VOID
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// HalpPCIInterruptHandlerEB66
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// IN PKINTERRUPT Interrupt,
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// IN PVOID ServiceContext
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// )
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//
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// Routine Description:
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//
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// This function is executed as the result of an interrupt on a PCI
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// bus. The function is responsible for calling HalpPCIDispatch to
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// appropriately dispatch the interrupt.
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//
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// N.B. This function exists only to capture the trap frame and forward
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// the interrupt to HalpPCIDispatch.
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//
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// Arguments:
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//
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// Interrupt (a0) - Supplies a pointer to the interrupt object.
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//
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// ServiceContext (a1) - Supplies a pointer to the service context for
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// PCI interrupts.
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//
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// TrapFrame (fp/s6) - Supplies a pointer to the trap frame for
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// the interrupt.
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//
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// Return Value:
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//
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// None.
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//
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//--
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LEAF_ENTRY(HalpPCIInterruptHandlerEB66)
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bis fp, zero, a2 // capture trap frame as argument
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br zero, HalpPCIDispatchEB66 // dispatch the interrupt
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ret zero, (ra) // will never get here
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.end HalpPCIInterruptHandlerEB66
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SBTTL("Mustang PCI Interrupt Handler")
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//++
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//
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// VOID
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// HalpPCIInterruptHandlerMustang
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// IN PKINTERRUPT Interrupt,
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// IN PVOID ServiceContext
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// )
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//
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// Routine Description:
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//
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// This function is executed as the result of an interrupt on a PCI
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// bus. The function is responsible for calling HalpPCIDispatch to
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// appropriately dispatch the interrupt.
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//
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// N.B. This function exists only to capture the trap frame and forward
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// the interrupt to HalpPCIDispatch.
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//
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// Arguments:
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//
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// Interrupt (a0) - Supplies a pointer to the interrupt object.
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//
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// ServiceContext (a1) - Supplies a pointer to the service context for
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// PCI interrupts.
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//
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// TrapFrame (fp/s6) - Supplies a pointer to the trap frame for
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// the interrupt.
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//
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// Return Value:
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//
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// None.
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//
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//--
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LEAF_ENTRY(HalpPCIInterruptHandlerMustang)
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bis fp, zero, a2 // capture trap frame as argument
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br zero, HalpPCIDispatchMustang // dispatch the interrupt
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ret zero, (ra) // will never get here
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.end HalpPCIInterruptHandlerMustang
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