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