1*aca3beaaSApple OSS Distributions /* 2*aca3beaaSApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*aca3beaaSApple OSS Distributions * 4*aca3beaaSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*aca3beaaSApple OSS Distributions * 6*aca3beaaSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*aca3beaaSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*aca3beaaSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*aca3beaaSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*aca3beaaSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*aca3beaaSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*aca3beaaSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*aca3beaaSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*aca3beaaSApple OSS Distributions * 15*aca3beaaSApple OSS Distributions * Please obtain a copy of the License at 16*aca3beaaSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*aca3beaaSApple OSS Distributions * 18*aca3beaaSApple OSS Distributions * The Original Code and all software distributed under the License are 19*aca3beaaSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*aca3beaaSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*aca3beaaSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*aca3beaaSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*aca3beaaSApple OSS Distributions * Please see the License for the specific language governing rights and 24*aca3beaaSApple OSS Distributions * limitations under the License. 25*aca3beaaSApple OSS Distributions * 26*aca3beaaSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*aca3beaaSApple OSS Distributions */ 28*aca3beaaSApple OSS Distributions 29*aca3beaaSApple OSS Distributions #pragma once 30*aca3beaaSApple OSS Distributions 31*aca3beaaSApple OSS Distributions extern "C" { 32*aca3beaaSApple OSS Distributions #include <mach/semaphore.h> 33*aca3beaaSApple OSS Distributions }; 34*aca3beaaSApple OSS Distributions 35*aca3beaaSApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*aca3beaaSApple OSS Distributions 37*aca3beaaSApple OSS Distributions /*! 38*aca3beaaSApple OSS Distributions * @class PassthruInterruptController 39*aca3beaaSApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*aca3beaaSApple OSS Distributions * "child" driver. 41*aca3beaaSApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*aca3beaaSApple OSS Distributions * then passes the child driver's IOService pointer back via 43*aca3beaaSApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*aca3beaaSApple OSS Distributions */ 45*aca3beaaSApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*aca3beaaSApple OSS Distributions { 47*aca3beaaSApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*aca3beaaSApple OSS Distributions 49*aca3beaaSApple OSS Distributions public: 50*aca3beaaSApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*aca3beaaSApple OSS Distributions 52*aca3beaaSApple OSS Distributions virtual void *waitForChildController(void); 53*aca3beaaSApple OSS Distributions 54*aca3beaaSApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*aca3beaaSApple OSS Distributions 56*aca3beaaSApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*aca3beaaSApple OSS Distributions void *target, 58*aca3beaaSApple OSS Distributions IOInterruptHandler handler, 59*aca3beaaSApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*aca3beaaSApple OSS Distributions 61*aca3beaaSApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*aca3beaaSApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*aca3beaaSApple OSS Distributions 64*aca3beaaSApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*aca3beaaSApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*aca3beaaSApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*aca3beaaSApple OSS Distributions 68*aca3beaaSApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*aca3beaaSApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*aca3beaaSApple OSS Distributions 71*aca3beaaSApple OSS Distributions virtual void externalInterrupt(void); 72*aca3beaaSApple OSS Distributions 73*aca3beaaSApple OSS Distributions protected: 74*aca3beaaSApple OSS Distributions IOInterruptHandler child_handler; 75*aca3beaaSApple OSS Distributions void *child_target; 76*aca3beaaSApple OSS Distributions void *child_refCon; 77*aca3beaaSApple OSS Distributions IOService *child_nub; 78*aca3beaaSApple OSS Distributions semaphore_t child_sentinel; 79*aca3beaaSApple OSS Distributions }; 80