1*2c2f96dcSApple OSS Distributions /* 2*2c2f96dcSApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*2c2f96dcSApple OSS Distributions * 4*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*2c2f96dcSApple OSS Distributions * 6*2c2f96dcSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*2c2f96dcSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*2c2f96dcSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*2c2f96dcSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*2c2f96dcSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*2c2f96dcSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*2c2f96dcSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*2c2f96dcSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*2c2f96dcSApple OSS Distributions * 15*2c2f96dcSApple OSS Distributions * Please obtain a copy of the License at 16*2c2f96dcSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*2c2f96dcSApple OSS Distributions * 18*2c2f96dcSApple OSS Distributions * The Original Code and all software distributed under the License are 19*2c2f96dcSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*2c2f96dcSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*2c2f96dcSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*2c2f96dcSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*2c2f96dcSApple OSS Distributions * Please see the License for the specific language governing rights and 24*2c2f96dcSApple OSS Distributions * limitations under the License. 25*2c2f96dcSApple OSS Distributions * 26*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*2c2f96dcSApple OSS Distributions */ 28*2c2f96dcSApple OSS Distributions 29*2c2f96dcSApple OSS Distributions #pragma once 30*2c2f96dcSApple OSS Distributions 31*2c2f96dcSApple OSS Distributions extern "C" { 32*2c2f96dcSApple OSS Distributions #include <mach/semaphore.h> 33*2c2f96dcSApple OSS Distributions }; 34*2c2f96dcSApple OSS Distributions 35*2c2f96dcSApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*2c2f96dcSApple OSS Distributions 37*2c2f96dcSApple OSS Distributions /*! 38*2c2f96dcSApple OSS Distributions * @class PassthruInterruptController 39*2c2f96dcSApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*2c2f96dcSApple OSS Distributions * "child" driver. 41*2c2f96dcSApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*2c2f96dcSApple OSS Distributions * then passes the child driver's IOService pointer back via 43*2c2f96dcSApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*2c2f96dcSApple OSS Distributions */ 45*2c2f96dcSApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*2c2f96dcSApple OSS Distributions { 47*2c2f96dcSApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*2c2f96dcSApple OSS Distributions 49*2c2f96dcSApple OSS Distributions public: 50*2c2f96dcSApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*2c2f96dcSApple OSS Distributions 52*2c2f96dcSApple OSS Distributions virtual void *waitForChildController(void); 53*2c2f96dcSApple OSS Distributions 54*2c2f96dcSApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*2c2f96dcSApple OSS Distributions 56*2c2f96dcSApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*2c2f96dcSApple OSS Distributions void *target, 58*2c2f96dcSApple OSS Distributions IOInterruptHandler handler, 59*2c2f96dcSApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*2c2f96dcSApple OSS Distributions 61*2c2f96dcSApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*2c2f96dcSApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*2c2f96dcSApple OSS Distributions 64*2c2f96dcSApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*2c2f96dcSApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*2c2f96dcSApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*2c2f96dcSApple OSS Distributions 68*2c2f96dcSApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*2c2f96dcSApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*2c2f96dcSApple OSS Distributions 71*2c2f96dcSApple OSS Distributions virtual void externalInterrupt(void); 72*2c2f96dcSApple OSS Distributions 73*2c2f96dcSApple OSS Distributions protected: 74*2c2f96dcSApple OSS Distributions IOInterruptHandler child_handler; 75*2c2f96dcSApple OSS Distributions void *child_target; 76*2c2f96dcSApple OSS Distributions void *child_refCon; 77*2c2f96dcSApple OSS Distributions IOService *child_nub; 78*2c2f96dcSApple OSS Distributions semaphore_t child_sentinel; 79*2c2f96dcSApple OSS Distributions }; 80