X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/de355530ae67247cbd0da700edb3a2a1dae884c2..7ee9d059c4eecf68ae4f8b0fb99ae2471eda79af:/iokit/Kernel/IOInterruptController.cpp?ds=sidebyside diff --git a/iokit/Kernel/IOInterruptController.cpp b/iokit/Kernel/IOInterruptController.cpp index bd3baa04d..1000178ad 100644 --- a/iokit/Kernel/IOInterruptController.cpp +++ b/iokit/Kernel/IOInterruptController.cpp @@ -1,41 +1,39 @@ /* - * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. + * Copyright (c) 1998-2010 Apple Inc. All rights reserved. * - * @APPLE_LICENSE_HEADER_START@ + * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * - * The contents of this file constitute Original Code as defined in and - * are subject to the Apple Public Source License Version 1.1 (the - * "License"). You may not use this file except in compliance with the - * License. Please obtain a copy of the License at - * http://www.apple.com/publicsource and read it before using this file. + * This file contains Original Code and/or Modifications of Original Code + * as defined in and that are subject to the Apple Public Source License + * Version 2.0 (the 'License'). You may not use this file except in + * compliance with the License. The rights granted to you under the License + * may not be used to create, or enable the creation or redistribution of, + * unlawful or unlicensed copies of an Apple operating system, or to + * circumvent, violate, or enable the circumvention or violation of, any + * terms of an Apple operating system software license agreement. * - * This Original Code and all software distributed under the License are - * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER + * Please obtain a copy of the License at + * http://www.opensource.apple.com/apsl/ and read it before using this file. + * + * The Original Code and all software distributed under the License are + * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the - * License for the specific language governing rights and limitations - * under the License. + * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. + * Please see the License for the specific language governing rights and + * limitations under the License. * - * @APPLE_LICENSE_HEADER_END@ - */ -/* - * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. - * - * DRI: Josh de Cesare - * + * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ - -#if __ppc__ -#include -#endif - #include #include #include +#include #include #include +#include +#include /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ @@ -59,77 +57,111 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, void *refCon) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; - long wasDisabledSoft; + int wasDisabledSoft; IOReturn error; OSData *vectorData; - IOService *originalNub; - int originalSource; - + IOOptionBits options; + bool canBeShared, shouldBeShared, wasAlreadyRegisterd; + + IOService *originalNub = NULL; // Protected by wasAlreadyRegisterd + int originalSource = 0; // Protected by wasAlreadyRegisterd + + interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; // Get the lock for this vector. - IOTakeLock(vector->interruptLock); + IOLockLock(vector->interruptLock); + + // Check if the interrupt source can/should be shared. + canBeShared = vectorCanBeShared(vectorNumber, vector); + IODTGetInterruptOptions(nub, source, &options); +#if defined(__i386__) || defined(__x86_64__) + int interruptType; + if (OSDynamicCast(IOPlatformDevice, getProvider()) && + (getInterruptType(nub, source, &interruptType) == kIOReturnSuccess) && + (kIOInterruptTypeLevel & interruptType)) + { + options |= kIODTInterruptShared; + } +#endif + shouldBeShared = canBeShared && (options & kIODTInterruptShared); + wasAlreadyRegisterd = vector->interruptRegistered; + + // If the vector is registered and can not be shared return error. + if (wasAlreadyRegisterd && !canBeShared) { + IOLockUnlock(vector->interruptLock); + return kIOReturnNoResources; + } - // If this vector is already in use, and can be shared, + // If this vector is already in use, and can be shared (implied), + // or it is not registered and should be shared, // register as a shared interrupt. - if (vector->interruptRegistered) { - if (!vectorCanBeShared(vectorNumber, vector)) { - IOUnlock(vector->interruptLock); - return kIOReturnNoResources; - } - + if (wasAlreadyRegisterd || shouldBeShared) { // If this vector is not already shared, break it out. if (vector->sharedController == 0) { // Make the IOShareInterruptController instance vector->sharedController = new IOSharedInterruptController; if (vector->sharedController == 0) { - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return kIOReturnNoMemory; } - // Save the nub and source for the original consumer. - originalNub = vector->nub; - originalSource = vector->source; - - // Save the dis/enable state for the original consumer's interrupt. - // Then disable the source - wasDisabledSoft = vector->interruptDisabledSoft; - disableInterrupt(originalNub, originalSource); + if (wasAlreadyRegisterd) { + // Save the nub and source for the original consumer. + originalNub = vector->nub; + originalSource = vector->source; + + // Physically disable the interrupt, but mark it as being enabled in the hardware. + // The interruptDisabledSoft now indicates the driver's request for enablement. + disableVectorHard(vectorNumber, vector); + vector->interruptDisabledHard = 0; + } // Initialize the new shared interrupt controller. - error = vector->sharedController->initInterruptController(this, - vectorData); + error = vector->sharedController->initInterruptController(this, vectorData); // If the IOSharedInterruptController could not be initalized, - // put the original consumor's interrupt back to normal and + // if needed, put the original consumer's interrupt back to normal and // get rid of whats left of the shared controller. if (error != kIOReturnSuccess) { - enableInterrupt(originalNub, originalSource); + if (wasAlreadyRegisterd) enableInterrupt(originalNub, originalSource); vector->sharedController->release(); vector->sharedController = 0; - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return error; } - // Try to register the original consumer on the shared controller. - error = vector->sharedController->registerInterrupt(originalNub, - originalSource, - vector->target, - vector->handler, - vector->refCon); - // If the original consumer could not be moved to the shared controller, - // put the original consumor's interrupt back to normal and - // get rid of whats left of the shared controller. - if (error != kIOReturnSuccess) { - enableInterrupt(originalNub, originalSource); - vector->sharedController->release(); - vector->sharedController = 0; - IOUnlock(vector->interruptLock); - return error; + // If there was an original consumer try to register it on the shared controller. + if (wasAlreadyRegisterd) { + error = vector->sharedController->registerInterrupt(originalNub, + originalSource, + vector->target, + vector->handler, + vector->refCon); + // If the original consumer could not be moved to the shared controller, + // put the original consumor's interrupt back to normal and + // get rid of whats left of the shared controller. + if (error != kIOReturnSuccess) { + // Save the driver's interrupt enablement state. + wasDisabledSoft = vector->interruptDisabledSoft; + + // Make the interrupt really hard disabled. + vector->interruptDisabledSoft = 1; + vector->interruptDisabledHard = 1; + + // Enable the original consumer's interrupt if needed. + if (!wasDisabledSoft) originalNub->enableInterrupt(originalSource); + enableInterrupt(originalNub, originalSource); + + vector->sharedController->release(); + vector->sharedController = 0; + IOLockUnlock(vector->interruptLock); + return error; + } } // Fill in vector with the shared controller's info. @@ -139,13 +171,27 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, vector->target = vector->sharedController; vector->refCon = 0; + // If the interrupt was already registered, + // save the driver's interrupt enablement state. + if (wasAlreadyRegisterd) wasDisabledSoft = vector->interruptDisabledSoft; + else wasDisabledSoft = true; + + // Do any specific initalization for this vector if it has not yet been used. + if (!wasAlreadyRegisterd) initVector(vectorNumber, vector); + + // Make the interrupt really hard disabled. + vector->interruptDisabledSoft = 1; + vector->interruptDisabledHard = 1; + vector->interruptRegistered = 1; + // Enable the original consumer's interrupt if needed. + // originalNub is protected by wasAlreadyRegisterd here (see line 184). if (!wasDisabledSoft) originalNub->enableInterrupt(originalSource); } error = vector->sharedController->registerInterrupt(nub, source, target, handler, refCon); - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return error; } @@ -164,28 +210,28 @@ IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source, vector->interruptDisabledSoft = 1; vector->interruptRegistered = 1; - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return kIOReturnSuccess; } IOReturn IOInterruptController::unregisterInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; // Get the lock for this vector. - IOTakeLock(vector->interruptLock); + IOLockLock(vector->interruptLock); // Return success if it is not already registered if (!vector->interruptRegistered) { - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return kIOReturnSuccess; } @@ -206,7 +252,7 @@ IOReturn IOInterruptController::unregisterInterrupt(IOService *nub, int source) vector->target = 0; vector->refCon = 0; - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return kIOReturnSuccess; } @@ -214,7 +260,7 @@ IOReturn IOInterruptController::getInterruptType(IOService *nub, int source, int *interruptType) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; @@ -222,7 +268,7 @@ IOReturn IOInterruptController::getInterruptType(IOService *nub, int source, interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; *interruptType = getVectorType(vectorNumber, vector); @@ -233,27 +279,21 @@ IOReturn IOInterruptController::getInterruptType(IOService *nub, int source, IOReturn IOInterruptController::enableInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; if (vector->interruptDisabledSoft) { vector->interruptDisabledSoft = 0; -#if __ppc__ - sync(); - isync(); -#endif if (!getPlatform()->atInterruptLevel()) { - while (vector->interruptActive); -#if __ppc__ - isync(); -#endif + while (vector->interruptActive) + {} } if (vector->interruptDisabledHard) { vector->interruptDisabledHard = 0; @@ -268,26 +308,20 @@ IOReturn IOInterruptController::enableInterrupt(IOService *nub, int source) IOReturn IOInterruptController::disableInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; vector->interruptDisabledSoft = 1; -#if __ppc__ - sync(); - isync(); -#endif if (!getPlatform()->atInterruptLevel()) { - while (vector->interruptActive); -#if __ppc__ - isync(); -#endif + while (vector->interruptActive) + {} } return kIOReturnSuccess; @@ -296,13 +330,13 @@ IOReturn IOInterruptController::disableInterrupt(IOService *nub, int source) IOReturn IOInterruptController::causeInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; causeVector(vectorNumber, vector); @@ -324,34 +358,34 @@ IOReturn IOInterruptController::handleInterrupt(void *refCon, IOService *nub, // Methods to be overridden for simplifed interrupt controller subclasses. -bool IOInterruptController::vectorCanBeShared(long /*vectorNumber*/, +bool IOInterruptController::vectorCanBeShared(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { return false; } -void IOInterruptController::initVector(long /*vectorNumber*/, +void IOInterruptController::initVector(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { } -int IOInterruptController::getVectorType(long /*vectorNumber*/, +int IOInterruptController::getVectorType(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { return kIOInterruptTypeEdge; } -void IOInterruptController::disableVectorHard(long /*vectorNumber*/, +void IOInterruptController::disableVectorHard(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { } -void IOInterruptController::enableVector(long /*vectorNumber*/, +void IOInterruptController::enableVector(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { } -void IOInterruptController::causeVector(long /*vectorNumber*/, +void IOInterruptController::causeVector(IOInterruptVectorNumber /*vectorNumber*/, IOInterruptVector */*vector*/) { } @@ -371,6 +405,8 @@ OSMetaClassDefineReservedUnused(IOSharedInterruptController, 3); /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ +#define kIOSharedInterruptControllerDefaultVectors (128) + IOReturn IOSharedInterruptController::initInterruptController(IOInterruptController *parentController, OSData *parentSource) { int cnt, interruptType; @@ -388,6 +424,8 @@ IOReturn IOSharedInterruptController::initInterruptController(IOInterruptControl _numInterruptSources = 1; // Set up the IOInterruptSource to point at this. + parentController->retain(); + parentSource->retain(); _interruptSources[0].interruptController = parentController; _interruptSources[0].vectorData = parentSource; @@ -399,7 +437,7 @@ IOReturn IOSharedInterruptController::initInterruptController(IOInterruptControl } // Allocate the memory for the vectors - numVectors = 8; // For now a constant number. + numVectors = kIOSharedInterruptControllerDefaultVectors; // For now a constant number. vectors = (IOInterruptVector *)IOMalloc(numVectors * sizeof(IOInterruptVector)); if (vectors == NULL) { IOFree(_interruptSources, sizeof(IOInterruptSource)); @@ -423,6 +461,7 @@ IOReturn IOSharedInterruptController::initInterruptController(IOInterruptControl } } + numVectors = 0; // reset the high water mark for used vectors vectorsRegistered = 0; vectorsEnabled = 0; controllerDisabled = 1; @@ -437,7 +476,7 @@ IOReturn IOSharedInterruptController::registerInterrupt(IOService *nub, void *refCon) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector = 0; OSData *vectorData; IOInterruptState interruptState; @@ -445,26 +484,26 @@ IOReturn IOSharedInterruptController::registerInterrupt(IOService *nub, interruptSources = nub->_interruptSources; // Find a free vector. - vectorNumber = numVectors; - while (vectorsRegistered != numVectors) { - for (vectorNumber = 0; vectorNumber < numVectors; vectorNumber++) { + vectorNumber = kIOSharedInterruptControllerDefaultVectors; + while (vectorsRegistered != kIOSharedInterruptControllerDefaultVectors) { + for (vectorNumber = 0; vectorNumber < kIOSharedInterruptControllerDefaultVectors; vectorNumber++) { vector = &vectors[vectorNumber]; // Get the lock for this vector. - IOTakeLock(vector->interruptLock); + IOLockLock(vector->interruptLock); // Is it unregistered? if (!vector->interruptRegistered) break; // Move along to the next one. - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); } - if (vectorNumber != numVectors) break; + if (vectorNumber != kIOSharedInterruptControllerDefaultVectors) break; } // Could not find a free one, so give up. - if (vectorNumber == numVectors) { + if (vectorNumber == kIOSharedInterruptControllerDefaultVectors) { return kIOReturnNoResources; } @@ -485,60 +524,67 @@ IOReturn IOSharedInterruptController::registerInterrupt(IOService *nub, vector->target = target; vector->refCon = refCon; - // Get the vector ready. It start soft disabled. + // Get the vector ready. It starts off soft disabled. vector->interruptDisabledSoft = 1; vector->interruptRegistered = 1; interruptState = IOSimpleLockLockDisableInterrupt(controllerLock); - vectorsRegistered++; + // Move the high water mark if needed + if (++vectorsRegistered > numVectors) numVectors = vectorsRegistered; IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState); - IOUnlock(vector->interruptLock); + IOLockUnlock(vector->interruptLock); return kIOReturnSuccess; } IOReturn IOSharedInterruptController::unregisterInterrupt(IOService *nub, int source) { - IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; - OSData *vectorData; - IOInterruptState interruptState;; - - interruptSources = nub->_interruptSources; - vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); - vector = &vectors[vectorNumber]; - - // Get the lock for this vector. - IOTakeLock(vector->interruptLock); - - // Return success if it is not already registered - if (!vector->interruptRegistered) { - IOUnlock(vector->interruptLock); - return kIOReturnSuccess; + IOInterruptState interruptState; + + for (vectorNumber = 0; vectorNumber < kIOSharedInterruptControllerDefaultVectors; vectorNumber++) { + vector = &vectors[vectorNumber]; + + // Get the lock for this vector. + IOLockLock(vector->interruptLock); + + // Return success if it is not already registered + if (!vector->interruptRegistered + || (vector->nub != nub) || (vector->source != source)) { + IOLockUnlock(vector->interruptLock); + continue; + } + + // Soft disable the source and the controller too. + disableInterrupt(nub, source); + + // Clear all the storage for the vector except for interruptLock. + vector->interruptActive = 0; + vector->interruptDisabledSoft = 0; + vector->interruptDisabledHard = 0; + vector->interruptRegistered = 0; + vector->nub = 0; + vector->source = 0; + vector->handler = 0; + vector->target = 0; + vector->refCon = 0; + + interruptState = IOSimpleLockLockDisableInterrupt(controllerLock); + vectorsRegistered--; + IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState); + + // Move along to the next one. + IOLockUnlock(vector->interruptLock); } - - // Soft disable the source. - disableInterrupt(nub, source); - - // Clear all the storage for the vector except for interruptLock. - vector->interruptActive = 0; - vector->interruptDisabledSoft = 0; - vector->interruptDisabledHard = 0; - vector->interruptRegistered = 0; - vector->nub = 0; - vector->source = 0; - vector->handler = 0; - vector->target = 0; - vector->refCon = 0; - - interruptState = IOSimpleLockLockDisableInterrupt(controllerLock); - vectorsRegistered--; - IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState); - - IOUnlock(vector->interruptLock); + + // Re-enable the controller if all vectors are enabled. + if (vectorsEnabled == vectorsRegistered) { + controllerDisabled = 0; + provider->enableInterrupt(0); + } + return kIOReturnSuccess; } @@ -553,14 +599,14 @@ IOReturn IOSharedInterruptController::enableInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; IOInterruptState interruptState; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; interruptState = IOSimpleLockLockDisableInterrupt(controllerLock); @@ -585,32 +631,26 @@ IOReturn IOSharedInterruptController::disableInterrupt(IOService *nub, int source) { IOInterruptSource *interruptSources; - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; OSData *vectorData; IOInterruptState interruptState; interruptSources = nub->_interruptSources; vectorData = interruptSources[source].vectorData; - vectorNumber = *(long *)vectorData->getBytesNoCopy(); + vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy(); vector = &vectors[vectorNumber]; interruptState = IOSimpleLockLockDisableInterrupt(controllerLock); if (!vector->interruptDisabledSoft) { vector->interruptDisabledSoft = 1; -#if __ppc__ - sync(); - isync(); -#endif vectorsEnabled--; } IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState); if (!getPlatform()->atInterruptLevel()) { - while (vector->interruptActive); -#if __ppc__ - isync(); -#endif + while (vector->interruptActive) + {} } return kIOReturnSuccess; @@ -618,35 +658,41 @@ IOReturn IOSharedInterruptController::disableInterrupt(IOService *nub, IOInterruptAction IOSharedInterruptController::getInterruptHandlerAddress(void) { - return (IOInterruptAction)&IOSharedInterruptController::handleInterrupt; + return OSMemberFunctionCast(IOInterruptAction, + this, &IOSharedInterruptController::handleInterrupt); } IOReturn IOSharedInterruptController::handleInterrupt(void * /*refCon*/, IOService * nub, int /*source*/) { - long vectorNumber; + IOInterruptVectorNumber vectorNumber; IOInterruptVector *vector; for (vectorNumber = 0; vectorNumber < numVectors; vectorNumber++) { vector = &vectors[vectorNumber]; vector->interruptActive = 1; -#if __ppc__ - sync(); - isync(); -#endif - if (!vector->interruptDisabledSoft) { -#if __ppc__ - isync(); -#endif - - // Call the handler if it exists. - if (vector->interruptRegistered) { - vector->handler(vector->target, vector->refCon, - vector->nub, vector->source); - } - } + if (!vector->interruptDisabledSoft) { + + // Call the handler if it exists. + if (vector->interruptRegistered) { + + bool trace = (gIOKitTrace & kIOTraceInterrupts) ? true : false; + + if (trace) + IOTimeStampStartConstant(IODBG_INTC(IOINTC_HANDLER), + (uintptr_t) vectorNumber, (uintptr_t) vector->handler, (uintptr_t)vector->target); + + // Call handler. + vector->handler(vector->target, vector->refCon, vector->nub, vector->source); + + if (trace) + IOTimeStampEndConstant(IODBG_INTC(IOINTC_HANDLER), + (uintptr_t) vectorNumber, (uintptr_t) vector->handler, (uintptr_t)vector->target); + + } + } vector->interruptActive = 0; }