xref: /xnu-8020.140.41/iokit/Examples/drvGenericInterruptController/GenericInterruptController.h (revision 27b03b360a988dfd3dfdf34262bb0042026747cc)

/*
 * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 *
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 *
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 *
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
 *
 *  DRI: Josh de Cesare
 *
 */

#ifndef _IOKIT_GENERICINTERRUPTCONTROLLER_H
#define _IOKIT_GENERICINTERRUPTCONTROLLER_H

#include <IOKit/IOInterrupts.h>
#include <IOKit/IOInterruptController.h>

class GenericInterruptController : public IOInterruptController
{
	IODeclareDefaultStructors(GenericInterruptController);

public:
// There should be a method to start or init the controller.
// Its nature is up to you.
	virtual bool start(IOService *provider);

// Returns the type of a vector: level or edge.  This will probably get
// replaced but a default method and a new method getVectorType.
	virtual IOReturn getInterruptType(IOService *nub, int source,
	    int *interruptType);

// Returns a function pointer for the interrupt handler.
// Sadly, egcs prevents this from being done by the base class.
	virtual IOInterruptAction getInterruptHandlerAddress(void);

// The actual interrupt handler.
	virtual IOReturn handleInterrupt(void *refCon,
	    IOService *nub, int source);


// Should return true if this vector can be shared.
// The base class return false, so this method only need to be implemented
// if the controller needs to support shared interrupts.
// No other work is required to support shared interrupts.
	virtual bool vectorCanBeShared(long vectorNumber, IOInterruptVector *vector);

// Do any hardware initalization for this vector.  Leave the vector
// hard disabled.
	virtual void initVector(long vectorNumber, IOInterruptVector *vector);

// Disable this vector at the hardware.
	virtual void disableVectorHard(long vectorNumber, IOInterruptVector *vector);

// Enable this vector at the hardware.
	virtual void enableVector(long vectorNumber, IOInterruptVector *vector);

// Cause an interrupt on this vector.
	virtual void causeVector(long vectorNumber, IOInterruptVector *vector);
};

#endif /* ! _IOKIT_GENERICINTERRUPTCONTROLLER_H */