projects / apple / xnu.git / blame
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|---|---|---|
| f427ee49 A |
1 | /* |
| 2 | * Copyright (c) 2019 Apple Computer, Inc. All rights reserved. | |
| 3 | * | |
| 4 | * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ | |
| 5 | * | |
| 6 | * This file contains Original Code and/or Modifications of Original Code | |
| 7 | * as defined in and that are subject to the Apple Public Source License | |
| 8 | * Version 2.0 (the 'License'). You may not use this file except in | |
| 9 | * compliance with the License. The rights granted to you under the License | |
| 10 | * may not be used to create, or enable the creation or redistribution of, | |
| 11 | * unlawful or unlicensed copies of an Apple operating system, or to | |
| 12 | * circumvent, violate, or enable the circumvention or violation of, any | |
| 13 | * terms of an Apple operating system software license agreement. | |
| 14 | * | |
| 15 | * Please obtain a copy of the License at | |
| 16 | * http://www.opensource.apple.com/apsl/ and read it before using this file. | |
| 17 | * | |
| 18 | * The Original Code and all software distributed under the License are | |
| 19 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER | |
| 20 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, | |
| 21 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, | |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. | |
| 23 | * Please see the License for the specific language governing rights and | |
| 24 | * limitations under the License. | |
| 25 | * | |
| 26 | * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ | |
| 27 | */ | |
| 28 | ||
| 29 | #pragma once | |
| 30 | ||
| 31 | extern "C" { | |
| 32 | #include <mach/semaphore.h> | |
| 33 | }; | |
| 34 | ||
| 35 | #include <IOKit/IOInterruptController.h> | |
| 36 | ||
| 37 | /*! | |
| 38 | * @class PassthruInterruptController | |
| 39 | * @abstract Trivial IOInterruptController class that passes all IRQs through to a | |
| 40 | * "child" driver. | |
| 41 | * @discussion Waits for a "child" driver (typically loaded in a kext) to register itself, | |
| 42 | * then passes the child driver's IOService pointer back via | |
| 43 | * waitForChildController() so that XNU can operate on it directly. | |
| 44 | */ | |
| 45 | class PassthruInterruptController : public IOInterruptController | |
| 46 | { | |
| 47 | OSDeclareDefaultStructors(PassthruInterruptController); | |
| 48 | ||
| 49 | public: | |
| 50 | virtual bool init(void) APPLE_KEXT_OVERRIDE; | |
| 51 | ||
| 52 | virtual void *waitForChildController(void); | |
| 53 | ||
| 54 | virtual void setCPUInterruptProperties(IOService *service) APPLE_KEXT_OVERRIDE; | |
| 55 | ||
| 56 | virtual IOReturn registerInterrupt(IOService *nub, int source, | |
| 57 | void *target, | |
| 58 | IOInterruptHandler handler, | |
| 59 | void *refCon) APPLE_KEXT_OVERRIDE; | |
| 60 | ||
| 61 | virtual IOReturn getInterruptType(IOService *nub, int source, | |
| 62 | int *interruptType) APPLE_KEXT_OVERRIDE; | |
| 63 | ||
| 64 | virtual IOReturn enableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; | |
| 65 | virtual IOReturn disableInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; | |
| 66 | virtual IOReturn causeInterrupt(IOService *nub, int source) APPLE_KEXT_OVERRIDE; | |
| 67 | ||
| 68 | virtual IOReturn handleInterrupt(void *refCon, IOService *nub, | |
| 69 | int source) APPLE_KEXT_OVERRIDE; | |
| 70 | ||
| 71 | virtual void externalInterrupt(void); | |
| 72 | ||
| 73 | protected: | |
| 74 | IOInterruptHandler child_handler; | |
| 75 | void *child_target; | |
| 76 | void *child_refCon; | |
| 77 | IOService *child_nub; | |
| 78 | semaphore_t child_sentinel; | |
| 79 | }; |