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/** @file
Abstraction for hardware based interrupt routine
On non IA-32 systems it is common to have a single hardware interrupt vector
and a 2nd layer of software that routes the interrupt handlers based on the
interrupt source. This protocol enables this routing. The driver implementing
this protocol is responsible for clearing the pending interrupt in the
interrupt routing hardware. The HARDWARE_INTERRUPT_HANDLER is responsible
for clearing interrupt sources from individual devices.
Copyright (c) 2008-2009 Apple Inc. All rights reserved.<BR>
All rights reserved. This program and the accompanying materials
are licensed and made available under the terms and conditions of the BSD License
which accompanies this distribution. The full text of the license may be found at
http://opensource.org/licenses/bsd-license.php
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
**/
#ifndef __HARDWARE_INTERRUPT_H__
#define __HARDWARE_INTERRUPT_H__
#include <Protocol/DebugSupport.h>
//
// Protocol GUID
//
// EAB39028-3D05-4316-AD0C-D64808DA3FF1
#define EFI_HARDWARE_INTERRUPT_PROTOCOL_GGUID \
{ 0x2890B3EA, 0x053D, 0x1643, { 0xAD, 0x0C, 0xD6, 0x48, 0x08, 0xDA, 0x3F, 0xF1 } }
typedef struct _EFI_HARDWARE_INTERRUPT_PROTOCOL EFI_HARDWARE_INTERRUPT_PROTOCOL;
typedef UINTN HARDWARE_INTERRUPT_SOURCE;
/**
C Interrupt Handler calledin the interrupt context when Source interrupt is active.
@param Source Source of the interrupt. Hardware routing off a specific platform defines
what source means.
@param SystemContext Pointer to system register context. Mostly used by debuggers and will
update the system context after the return from the interrupt if
modified. Don't change these values unless you know what you are doing
**/
typedef
VOID
(EFIAPI *HARDWARE_INTERRUPT_HANDLER) (
IN HARDWARE_INTERRUPT_SOURCE Source,
IN EFI_SYSTEM_CONTEXT SystemContext
);
/**
Register Handler for the specified interrupt source.
@param This Instance pointer for this protocol
@param Source Hardware source of the interrupt
@param Handler Callback for interrupt. NULL to unregister
@retval EFI_SUCCESS Source was updated to support Handler.
@retval EFI_DEVICE_ERROR Hardware could not be programmed.
**/
typedef
EFI_STATUS
(EFIAPI *HARDWARE_INTERRUPT_REGISTER) (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
IN HARDWARE_INTERRUPT_SOURCE Source,
IN HARDWARE_INTERRUPT_HANDLER Handler
);
/**
Enable interrupt source Source.
@param This Instance pointer for this protocol
@param Source Hardware source of the interrupt
@retval EFI_SUCCESS Source interrupt enabled.
@retval EFI_DEVICE_ERROR Hardware could not be programmed.
**/
typedef
EFI_STATUS
(EFIAPI *HARDWARE_INTERRUPT_ENABLE) (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
IN HARDWARE_INTERRUPT_SOURCE Source
);
/**
Disable interrupt source Source.
@param This Instance pointer for this protocol
@param Source Hardware source of the interrupt
@retval EFI_SUCCESS Source interrupt disabled.
@retval EFI_DEVICE_ERROR Hardware could not be programmed.
**/
typedef
EFI_STATUS
(EFIAPI *HARDWARE_INTERRUPT_DISABLE) (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
IN HARDWARE_INTERRUPT_SOURCE Source
);
/**
Return current state of interrupt source Source.
@param This Instance pointer for this protocol
@param Source Hardware source of the interrupt
@param InterruptState TRUE: source enabled, FALSE: source disabled.
@retval EFI_SUCCESS InterruptState is valid
@retval EFI_DEVICE_ERROR InterruptState is not valid
**/
typedef
EFI_STATUS
(EFIAPI *HARDWARE_INTERRUPT_INTERRUPT_STATE) (
IN EFI_HARDWARE_INTERRUPT_PROTOCOL *This,
IN HARDWARE_INTERRUPT_SOURCE Source,
IN BOOLEAN *InterruptState
);
struct _EFI_HARDWARE_INTERRUPT_PROTOCOL {
HARDWARE_INTERRUPT_REGISTER RegisterInterruptSource;
HARDWARE_INTERRUPT_ENABLE EnableInterruptSource;
HARDWARE_INTERRUPT_DISABLE DisableInterruptSource;
HARDWARE_INTERRUPT_INTERRUPT_STATE GetInterruptSourceState;
};
extern EFI_GUID gHardwareInterruptProtocolGuid;
#endif
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