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 | }; |
80 | |