1*d4514f0bSApple OSS Distributions /* 2*d4514f0bSApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*d4514f0bSApple OSS Distributions * 4*d4514f0bSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*d4514f0bSApple OSS Distributions * 6*d4514f0bSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*d4514f0bSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*d4514f0bSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*d4514f0bSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*d4514f0bSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*d4514f0bSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*d4514f0bSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*d4514f0bSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*d4514f0bSApple OSS Distributions * 15*d4514f0bSApple OSS Distributions * Please obtain a copy of the License at 16*d4514f0bSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*d4514f0bSApple OSS Distributions * 18*d4514f0bSApple OSS Distributions * The Original Code and all software distributed under the License are 19*d4514f0bSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*d4514f0bSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*d4514f0bSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*d4514f0bSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*d4514f0bSApple OSS Distributions * Please see the License for the specific language governing rights and 24*d4514f0bSApple OSS Distributions * limitations under the License. 25*d4514f0bSApple OSS Distributions * 26*d4514f0bSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*d4514f0bSApple OSS Distributions */ 28*d4514f0bSApple OSS Distributions 29*d4514f0bSApple OSS Distributions #pragma once 30*d4514f0bSApple OSS Distributions 31*d4514f0bSApple OSS Distributions extern "C" { 32*d4514f0bSApple OSS Distributions #include <mach/semaphore.h> 33*d4514f0bSApple OSS Distributions }; 34*d4514f0bSApple OSS Distributions 35*d4514f0bSApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*d4514f0bSApple OSS Distributions 37*d4514f0bSApple OSS Distributions /*! 38*d4514f0bSApple OSS Distributions * @class PassthruInterruptController 39*d4514f0bSApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*d4514f0bSApple OSS Distributions * "child" driver. 41*d4514f0bSApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*d4514f0bSApple OSS Distributions * then passes the child driver's IOService pointer back via 43*d4514f0bSApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*d4514f0bSApple OSS Distributions */ 45*d4514f0bSApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*d4514f0bSApple OSS Distributions { 47*d4514f0bSApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*d4514f0bSApple OSS Distributions 49*d4514f0bSApple OSS Distributions public: 50*d4514f0bSApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*d4514f0bSApple OSS Distributions 52*d4514f0bSApple OSS Distributions virtual void *waitForChildController(void); 53*d4514f0bSApple OSS Distributions 54*d4514f0bSApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*d4514f0bSApple OSS Distributions 56*d4514f0bSApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*d4514f0bSApple OSS Distributions void *target, 58*d4514f0bSApple OSS Distributions IOInterruptHandler handler, 59*d4514f0bSApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*d4514f0bSApple OSS Distributions 61*d4514f0bSApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*d4514f0bSApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*d4514f0bSApple OSS Distributions 64*d4514f0bSApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*d4514f0bSApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*d4514f0bSApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*d4514f0bSApple OSS Distributions 68*d4514f0bSApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*d4514f0bSApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*d4514f0bSApple OSS Distributions 71*d4514f0bSApple OSS Distributions virtual void externalInterrupt(void); 72*d4514f0bSApple OSS Distributions 73*d4514f0bSApple OSS Distributions protected: 74*d4514f0bSApple OSS Distributions IOInterruptHandler child_handler; 75*d4514f0bSApple OSS Distributions void *child_target; 76*d4514f0bSApple OSS Distributions void *child_refCon; 77*d4514f0bSApple OSS Distributions IOService *child_nub; 78*d4514f0bSApple OSS Distributions semaphore_t child_sentinel; 79*d4514f0bSApple OSS Distributions }; 80