/* * 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; };