1*0f4c859eSApple OSS Distributions /* 2*0f4c859eSApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*0f4c859eSApple OSS Distributions * 4*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*0f4c859eSApple OSS Distributions * 6*0f4c859eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*0f4c859eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*0f4c859eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*0f4c859eSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*0f4c859eSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*0f4c859eSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*0f4c859eSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*0f4c859eSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*0f4c859eSApple OSS Distributions * 15*0f4c859eSApple OSS Distributions * Please obtain a copy of the License at 16*0f4c859eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*0f4c859eSApple OSS Distributions * 18*0f4c859eSApple OSS Distributions * The Original Code and all software distributed under the License are 19*0f4c859eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*0f4c859eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*0f4c859eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*0f4c859eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*0f4c859eSApple OSS Distributions * Please see the License for the specific language governing rights and 24*0f4c859eSApple OSS Distributions * limitations under the License. 25*0f4c859eSApple OSS Distributions * 26*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*0f4c859eSApple OSS Distributions */ 28*0f4c859eSApple OSS Distributions 29*0f4c859eSApple OSS Distributions #pragma once 30*0f4c859eSApple OSS Distributions 31*0f4c859eSApple OSS Distributions extern "C" { 32*0f4c859eSApple OSS Distributions #include <mach/semaphore.h> 33*0f4c859eSApple OSS Distributions }; 34*0f4c859eSApple OSS Distributions 35*0f4c859eSApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*0f4c859eSApple OSS Distributions 37*0f4c859eSApple OSS Distributions /*! 38*0f4c859eSApple OSS Distributions * @class PassthruInterruptController 39*0f4c859eSApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*0f4c859eSApple OSS Distributions * "child" driver. 41*0f4c859eSApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*0f4c859eSApple OSS Distributions * then passes the child driver's IOService pointer back via 43*0f4c859eSApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*0f4c859eSApple OSS Distributions */ 45*0f4c859eSApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*0f4c859eSApple OSS Distributions { 47*0f4c859eSApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*0f4c859eSApple OSS Distributions 49*0f4c859eSApple OSS Distributions public: 50*0f4c859eSApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*0f4c859eSApple OSS Distributions 52*0f4c859eSApple OSS Distributions virtual void *waitForChildController(void); 53*0f4c859eSApple OSS Distributions 54*0f4c859eSApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*0f4c859eSApple OSS Distributions 56*0f4c859eSApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*0f4c859eSApple OSS Distributions void *target, 58*0f4c859eSApple OSS Distributions IOInterruptHandler handler, 59*0f4c859eSApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*0f4c859eSApple OSS Distributions 61*0f4c859eSApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*0f4c859eSApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*0f4c859eSApple OSS Distributions 64*0f4c859eSApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*0f4c859eSApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*0f4c859eSApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*0f4c859eSApple OSS Distributions 68*0f4c859eSApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*0f4c859eSApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*0f4c859eSApple OSS Distributions 71*0f4c859eSApple OSS Distributions virtual void externalInterrupt(void); 72*0f4c859eSApple OSS Distributions 73*0f4c859eSApple OSS Distributions protected: 74*0f4c859eSApple OSS Distributions IOInterruptHandler child_handler; 75*0f4c859eSApple OSS Distributions void *child_target; 76*0f4c859eSApple OSS Distributions void *child_refCon; 77*0f4c859eSApple OSS Distributions IOService *child_nub; 78*0f4c859eSApple OSS Distributions semaphore_t child_sentinel; 79*0f4c859eSApple OSS Distributions }; 80