1*e7776783SApple OSS Distributions /* 2*e7776783SApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*e7776783SApple OSS Distributions * 4*e7776783SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*e7776783SApple OSS Distributions * 6*e7776783SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*e7776783SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*e7776783SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*e7776783SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*e7776783SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*e7776783SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*e7776783SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*e7776783SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*e7776783SApple OSS Distributions * 15*e7776783SApple OSS Distributions * Please obtain a copy of the License at 16*e7776783SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*e7776783SApple OSS Distributions * 18*e7776783SApple OSS Distributions * The Original Code and all software distributed under the License are 19*e7776783SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*e7776783SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*e7776783SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*e7776783SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*e7776783SApple OSS Distributions * Please see the License for the specific language governing rights and 24*e7776783SApple OSS Distributions * limitations under the License. 25*e7776783SApple OSS Distributions * 26*e7776783SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*e7776783SApple OSS Distributions */ 28*e7776783SApple OSS Distributions 29*e7776783SApple OSS Distributions #pragma once 30*e7776783SApple OSS Distributions 31*e7776783SApple OSS Distributions extern "C" { 32*e7776783SApple OSS Distributions #include <mach/semaphore.h> 33*e7776783SApple OSS Distributions }; 34*e7776783SApple OSS Distributions 35*e7776783SApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*e7776783SApple OSS Distributions 37*e7776783SApple OSS Distributions /*! 38*e7776783SApple OSS Distributions * @class PassthruInterruptController 39*e7776783SApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*e7776783SApple OSS Distributions * "child" driver. 41*e7776783SApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*e7776783SApple OSS Distributions * then passes the child driver's IOService pointer back via 43*e7776783SApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*e7776783SApple OSS Distributions */ 45*e7776783SApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*e7776783SApple OSS Distributions { 47*e7776783SApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*e7776783SApple OSS Distributions 49*e7776783SApple OSS Distributions public: 50*e7776783SApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*e7776783SApple OSS Distributions 52*e7776783SApple OSS Distributions virtual void *waitForChildController(void); 53*e7776783SApple OSS Distributions 54*e7776783SApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*e7776783SApple OSS Distributions 56*e7776783SApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*e7776783SApple OSS Distributions void *target, 58*e7776783SApple OSS Distributions IOInterruptHandler handler, 59*e7776783SApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*e7776783SApple OSS Distributions 61*e7776783SApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*e7776783SApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*e7776783SApple OSS Distributions 64*e7776783SApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*e7776783SApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*e7776783SApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*e7776783SApple OSS Distributions 68*e7776783SApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*e7776783SApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*e7776783SApple OSS Distributions 71*e7776783SApple OSS Distributions virtual void externalInterrupt(void); 72*e7776783SApple OSS Distributions 73*e7776783SApple OSS Distributions protected: 74*e7776783SApple OSS Distributions IOInterruptHandler child_handler; 75*e7776783SApple OSS Distributions void *child_target; 76*e7776783SApple OSS Distributions void *child_refCon; 77*e7776783SApple OSS Distributions IOService *child_nub; 78*e7776783SApple OSS Distributions semaphore_t child_sentinel; 79*e7776783SApple OSS Distributions }; 80