1*fdd8201dSApple OSS Distributions /* 2*fdd8201dSApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*fdd8201dSApple OSS Distributions * 4*fdd8201dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*fdd8201dSApple OSS Distributions * 6*fdd8201dSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*fdd8201dSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*fdd8201dSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*fdd8201dSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*fdd8201dSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*fdd8201dSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*fdd8201dSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*fdd8201dSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*fdd8201dSApple OSS Distributions * 15*fdd8201dSApple OSS Distributions * Please obtain a copy of the License at 16*fdd8201dSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*fdd8201dSApple OSS Distributions * 18*fdd8201dSApple OSS Distributions * The Original Code and all software distributed under the License are 19*fdd8201dSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*fdd8201dSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*fdd8201dSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*fdd8201dSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*fdd8201dSApple OSS Distributions * Please see the License for the specific language governing rights and 24*fdd8201dSApple OSS Distributions * limitations under the License. 25*fdd8201dSApple OSS Distributions * 26*fdd8201dSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*fdd8201dSApple OSS Distributions */ 28*fdd8201dSApple OSS Distributions 29*fdd8201dSApple OSS Distributions #pragma once 30*fdd8201dSApple OSS Distributions 31*fdd8201dSApple OSS Distributions extern "C" { 32*fdd8201dSApple OSS Distributions #include <mach/semaphore.h> 33*fdd8201dSApple OSS Distributions }; 34*fdd8201dSApple OSS Distributions 35*fdd8201dSApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*fdd8201dSApple OSS Distributions 37*fdd8201dSApple OSS Distributions /*! 38*fdd8201dSApple OSS Distributions * @class PassthruInterruptController 39*fdd8201dSApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*fdd8201dSApple OSS Distributions * "child" driver. 41*fdd8201dSApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*fdd8201dSApple OSS Distributions * then passes the child driver's IOService pointer back via 43*fdd8201dSApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*fdd8201dSApple OSS Distributions */ 45*fdd8201dSApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*fdd8201dSApple OSS Distributions { 47*fdd8201dSApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*fdd8201dSApple OSS Distributions 49*fdd8201dSApple OSS Distributions public: 50*fdd8201dSApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*fdd8201dSApple OSS Distributions 52*fdd8201dSApple OSS Distributions virtual void *waitForChildController(void); 53*fdd8201dSApple OSS Distributions 54*fdd8201dSApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*fdd8201dSApple OSS Distributions 56*fdd8201dSApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*fdd8201dSApple OSS Distributions void *target, 58*fdd8201dSApple OSS Distributions IOInterruptHandler handler, 59*fdd8201dSApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*fdd8201dSApple OSS Distributions 61*fdd8201dSApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*fdd8201dSApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*fdd8201dSApple OSS Distributions 64*fdd8201dSApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*fdd8201dSApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*fdd8201dSApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*fdd8201dSApple OSS Distributions 68*fdd8201dSApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*fdd8201dSApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*fdd8201dSApple OSS Distributions 71*fdd8201dSApple OSS Distributions virtual void externalInterrupt(void); 72*fdd8201dSApple OSS Distributions 73*fdd8201dSApple OSS Distributions protected: 74*fdd8201dSApple OSS Distributions IOInterruptHandler child_handler; 75*fdd8201dSApple OSS Distributions void *child_target; 76*fdd8201dSApple OSS Distributions void *child_refCon; 77*fdd8201dSApple OSS Distributions IOService *child_nub; 78*fdd8201dSApple OSS Distributions semaphore_t child_sentinel; 79*fdd8201dSApple OSS Distributions }; 80