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121 lines
2.9 KiB
121 lines
2.9 KiB
// TITLE("Lego PCI/ServerMgmt Interrupt Handler")
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//++
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//
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// Copyright (c) 1994,1995 Digital Equipment Corporation
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//
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// Module Name:
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//
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// lgintr.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 Lego
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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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// 29-Apr-1994 James Livingston
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// Adapt from Avanti ebintr.s for Mikasa
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//
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// 3-Nov-1995 Gene Morgan
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// Initial version for Lego. Adapt from Mikasa's mkintr.s,
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// add Server Management dispatch.
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//
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//--
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#include "halalpha.h"
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SBTTL("Lego PCI Interrupt Handler")
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//++
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//
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// VOID
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// HalpPciInterruptHandler
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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 the PCI I/O
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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(HalpPciInterruptHandler)
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bis fp, zero, a2 // capture trap frame as argument
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br zero, HalpPciDispatch // dispatch the interrupt to the PCI handler
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ret zero, (ra) // will never get here
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.end HalpPciInterruptHandler
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SBTTL("Lego Server Management Interrupt Handler")
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//++
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//
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// VOID
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// HalpPciInterruptHandler
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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 the
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// CPU IRQ pin allocated to Lego Server Management functions.
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// The function is responsible for calling HalpServerMgmtDispatch() 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 HalpServerMgmtDispatch.
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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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// Server Management 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(HalpServerMgmtInterruptHandler)
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bis fp, zero, a2 // capture trap frame as argument
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br zero, HalpServerMgmtDispatch // dispatch the interrupt to the PCI handler
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ret zero, (ra) // will never get here
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.end HalpServerMgmtInterruptHandler
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