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Annotation of XNU/iokit/IOKit/IOInterruptController.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
        !             3:  *
        !             4:  * @APPLE_LICENSE_HEADER_START@
        !             5:  * 
        !             6:  * The contents of this file constitute Original Code as defined in and
        !             7:  * are subject to the Apple Public Source License Version 1.1 (the
        !             8:  * "License").  You may not use this file except in compliance with the
        !             9:  * License.  Please obtain a copy of the License at
        !            10:  * http://www.apple.com/publicsource and read it before using this file.
        !            11:  * 
        !            12:  * This Original Code and all software distributed under the License are
        !            13:  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
        !            14:  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
        !            15:  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
        !            16:  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
        !            17:  * License for the specific language governing rights and limitations
        !            18:  * under the License.
        !            19:  * 
        !            20:  * @APPLE_LICENSE_HEADER_END@
        !            21:  */
        !            22: /*
        !            23:  * Copyright (c) 1999 Apple Computer, Inc.  All rights reserved.
        !            24:  *
        !            25:  *  DRI: Josh de Cesare
        !            26:  *  
        !            27:  */
        !            28: 
        !            29: 
        !            30: #ifndef _IOKIT_IOINTERRUPTCONTROLLER_H
        !            31: #define _IOKIT_IOINTERRUPTCONTROLLER_H
        !            32: 
        !            33: #include <IOKit/IOLocks.h>
        !            34: #include <IOKit/IOService.h>
        !            35: #include <IOKit/IOInterrupts.h>
        !            36: 
        !            37: 
        !            38: class IOSharedInterruptController;
        !            39: 
        !            40: struct IOInterruptVector {
        !            41:   volatile char               interruptActive;
        !            42:   volatile char               interruptDisabledSoft;
        !            43:   volatile char               interruptDisabledHard;
        !            44:   volatile char               interruptRegistered;
        !            45:   IOLock *                    interruptLock;
        !            46:   IOService *                 nub;
        !            47:   long                        source;
        !            48:   void *                      target;
        !            49:   IOInterruptHandler          handler;
        !            50:   void *                      refCon;
        !            51:   IOSharedInterruptController *sharedController;
        !            52: };
        !            53: 
        !            54: typedef struct IOInterruptVector IOInterruptVector;
        !            55: 
        !            56: 
        !            57: class IOInterruptController : public IOService
        !            58: {
        !            59:   OSDeclareAbstractStructors(IOInterruptController);
        !            60: 
        !            61: protected:
        !            62:   IOInterruptVector *vectors;
        !            63:   
        !            64: public:
        !            65:   virtual IOReturn registerInterrupt(IOService *nub, int source,
        !            66:                                     void *target,
        !            67:                                     IOInterruptHandler handler,
        !            68:                                     void *refCon);
        !            69:   virtual IOReturn unregisterInterrupt(IOService *nub, int source);
        !            70:   
        !            71:   virtual IOReturn getInterruptType(IOService *nub, int source,
        !            72:                                    int *interruptType);
        !            73:   
        !            74:   virtual IOReturn enableInterrupt(IOService *nub, int source);
        !            75:   virtual IOReturn disableInterrupt(IOService *nub, int source);
        !            76:   virtual IOReturn causeInterrupt(IOService *nub, int source);
        !            77:   
        !            78:   virtual IOInterruptAction getInterruptHandlerAddress(void);
        !            79:   virtual IOReturn handleInterrupt(void *refCon, IOService *nub,
        !            80:                                   int source);
        !            81:   
        !            82:   // Methods to be overridden for simplifed interrupt controller subclasses.
        !            83:   
        !            84:   virtual bool vectorCanBeShared(long vectorNumber, IOInterruptVector *vector);
        !            85:   virtual void initVector(long vectorNumber, IOInterruptVector *vector);
        !            86:   virtual int  getVectorType(long vectorNumber, IOInterruptVector *vector);
        !            87:   virtual void disableVectorHard(long vectorNumber, IOInterruptVector *vector);
        !            88:   virtual void enableVector(long vectorNumber, IOInterruptVector *vector);
        !            89:   virtual void causeVector(long vectorNumber, IOInterruptVector *vector);
        !            90: };
        !            91: 
        !            92: 
        !            93: class IOSharedInterruptController : public IOInterruptController
        !            94: {
        !            95:   OSDeclareDefaultStructors(IOSharedInterruptController);
        !            96:   
        !            97: private:
        !            98:   IOService         *provider;
        !            99:   int               numVectors;
        !           100:   int               vectorsRegistered;
        !           101:   int               vectorsEnabled;
        !           102:   volatile long     controllerDisabled;
        !           103:   bool              sourceIsLevel;
        !           104:   
        !           105: public:
        !           106:   virtual IOReturn initInterruptController(IOInterruptController *parentController, OSData *parentSource);
        !           107:   
        !           108:   virtual IOReturn registerInterrupt(IOService *nub, int source,
        !           109:                                      void *target,
        !           110:                                      IOInterruptHandler handler,
        !           111:                                      void *refCon);
        !           112:   virtual IOReturn unregisterInterrupt(IOService *nub, int source);
        !           113:   
        !           114:   virtual IOReturn getInterruptType(IOService *nub, int source,
        !           115:                                    int *interruptType);
        !           116:   
        !           117:   virtual IOReturn enableInterrupt(IOService *nub, int source);
        !           118:   virtual IOReturn disableInterrupt(IOService *nub, int source);
        !           119:   
        !           120:   virtual IOInterruptAction getInterruptHandlerAddress(void);
        !           121:   virtual IOReturn handleInterrupt(void *refCon, IOService *nub, int source);
        !           122: };
        !           123: 
        !           124: 
        !           125: #endif /* ! _IOKIT_IOINTERRUPTCONTROLLER_H */

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