1*19c3b8c2SApple OSS Distributions /* 2*19c3b8c2SApple OSS Distributions * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. 3*19c3b8c2SApple OSS Distributions * 4*19c3b8c2SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*19c3b8c2SApple OSS Distributions * 6*19c3b8c2SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*19c3b8c2SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*19c3b8c2SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*19c3b8c2SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*19c3b8c2SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*19c3b8c2SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*19c3b8c2SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*19c3b8c2SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*19c3b8c2SApple OSS Distributions * 15*19c3b8c2SApple OSS Distributions * Please obtain a copy of the License at 16*19c3b8c2SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*19c3b8c2SApple OSS Distributions * 18*19c3b8c2SApple OSS Distributions * The Original Code and all software distributed under the License are 19*19c3b8c2SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*19c3b8c2SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*19c3b8c2SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*19c3b8c2SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*19c3b8c2SApple OSS Distributions * Please see the License for the specific language governing rights and 24*19c3b8c2SApple OSS Distributions * limitations under the License. 25*19c3b8c2SApple OSS Distributions * 26*19c3b8c2SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*19c3b8c2SApple OSS Distributions */ 28*19c3b8c2SApple OSS Distributions 29*19c3b8c2SApple OSS Distributions #pragma once 30*19c3b8c2SApple OSS Distributions 31*19c3b8c2SApple OSS Distributions extern "C" { 32*19c3b8c2SApple OSS Distributions #include <mach/semaphore.h> 33*19c3b8c2SApple OSS Distributions }; 34*19c3b8c2SApple OSS Distributions 35*19c3b8c2SApple OSS Distributions #include <IOKit/IOInterruptController.h> 36*19c3b8c2SApple OSS Distributions 37*19c3b8c2SApple OSS Distributions /*! 38*19c3b8c2SApple OSS Distributions * @class PassthruInterruptController 39*19c3b8c2SApple OSS Distributions * @abstract Trivial IOInterruptController class that passes all IRQs through to a 40*19c3b8c2SApple OSS Distributions * "child" driver. 41*19c3b8c2SApple OSS Distributions * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, 42*19c3b8c2SApple OSS Distributions * then passes the child driver's IOService pointer back via 43*19c3b8c2SApple OSS Distributions * waitForChildController() so that XNU can operate on it directly. 44*19c3b8c2SApple OSS Distributions */ 45*19c3b8c2SApple OSS Distributions class PassthruInterruptController : public IOInterruptController 46*19c3b8c2SApple OSS Distributions { 47*19c3b8c2SApple OSS Distributions OSDeclareDefaultStructors(PassthruInterruptController); 48*19c3b8c2SApple OSS Distributions 49*19c3b8c2SApple OSS Distributions public: 50*19c3b8c2SApple OSS Distributions virtual bool init(void) APPLE_KEXT_OVERRIDE; 51*19c3b8c2SApple OSS Distributions 52*19c3b8c2SApple OSS Distributions virtual void *waitForChildController(void); 53*19c3b8c2SApple OSS Distributions 54*19c3b8c2SApple OSS Distributions virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; 55*19c3b8c2SApple OSS Distributions 56*19c3b8c2SApple OSS Distributions virtual IOReturn registerInterrupt(IOService *nub, int source, 57*19c3b8c2SApple OSS Distributions void *target, 58*19c3b8c2SApple OSS Distributions IOInterruptHandler handler, 59*19c3b8c2SApple OSS Distributions void *refCon) APPLE_KEXT_OVERRIDE; 60*19c3b8c2SApple OSS Distributions 61*19c3b8c2SApple OSS Distributions virtual IOReturn getInterruptType(IOService *nub, int source, 62*19c3b8c2SApple OSS Distributions int *interruptType) APPLE_KEXT_OVERRIDE; 63*19c3b8c2SApple OSS Distributions 64*19c3b8c2SApple OSS Distributions virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 65*19c3b8c2SApple OSS Distributions virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 66*19c3b8c2SApple OSS Distributions virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; 67*19c3b8c2SApple OSS Distributions 68*19c3b8c2SApple OSS Distributions virtual IOReturn handleInterrupt(void *refCon, IOService *nub, 69*19c3b8c2SApple OSS Distributions int source) APPLE_KEXT_OVERRIDE; 70*19c3b8c2SApple OSS Distributions 71*19c3b8c2SApple OSS Distributions virtual void externalInterrupt(void); 72*19c3b8c2SApple OSS Distributions 73*19c3b8c2SApple OSS Distributions protected: 74*19c3b8c2SApple OSS Distributions IOInterruptHandler child_handler; 75*19c3b8c2SApple OSS Distributions void *child_target; 76*19c3b8c2SApple OSS Distributions void *child_refCon; 77*19c3b8c2SApple OSS Distributions IOService *child_nub; 78*19c3b8c2SApple OSS Distributions semaphore_t child_sentinel; 79*19c3b8c2SApple OSS Distributions }; 80