/*
* Copyright (c) 2019 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@
*/
#pragma once
extern "C" {
#include <mach/semaphore.h>
};
#include <IOKit/IOInterruptController.h>
/*!
* @class PassthruInterruptController
* @abstract Trivial IOInterruptController class that passes all IRQs through to a
* "child" driver.
* @discussion Waits for a "child" driver (typically loaded in a kext) to register itself,
* then passes the child driver's IOService pointer back via
* waitForChildController() so that XNU can operate on it directly.
*/
class PassthruInterruptController : public IOInterruptController
{
OSDeclareDefaultStructors(PassthruInterruptController);
public:
virtual bool init(void) APPLE_KEXT_OVERRIDE;
virtual void *waitForChildController(void);
virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE;
virtual IOReturn registerInterrupt(IOService *nub, int source,
void *target,
IOInterruptHandler handler,
void *refCon) APPLE_KEXT_OVERRIDE;
virtual IOReturn getInterruptType(IOService *nub, int source,
int *interruptType) APPLE_KEXT_OVERRIDE;
virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE;
virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE;
virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE;
virtual IOReturn handleInterrupt(void *refCon, IOService *nub,
int source) APPLE_KEXT_OVERRIDE;
virtual void externalInterrupt(void);
protected:
IOInterruptHandler child_handler;
void *child_target;
void *child_refCon;
IOService *child_nub;
semaphore_t child_sentinel;
};