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--- xnu/xnu-1228.3.13/iokit/Kernel/IOInterruptController.cpp
+++ xnu/xnu-11417.121.6/iokit/Kernel/IOInterruptController.cpp
@@ -1,8 +1,9 @@
/*
- * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2007-2012 Apple Inc. All rights reserved.
+ * Copyright (c) 1998-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
- *
+ *
* 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
@@ -11,10 +12,10 @@
* 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.
- *
+ *
* 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,
@@ -22,20 +23,9 @@
* 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_OSREFERENCE_LICENSE_HEADER_END@
*/
-/*
- * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
- *
- * DRI: Josh de Cesare
- *
- */
-
-
-#if __ppc__
-#include <ppc/proc_reg.h>
-#endif
#include <IOKit/IOLib.h>
#include <IOKit/IOService.h>
@@ -43,6 +33,8 @@
#include <IOKit/IODeviceTreeSupport.h>
#include <IOKit/IOInterrupts.h>
#include <IOKit/IOInterruptController.h>
+#include <IOKit/IOKitDebug.h>
+#include <IOKit/IOTimeStamp.h>
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -51,354 +43,467 @@
OSDefineMetaClassAndAbstractStructors(IOInterruptController, IOService);
-OSMetaClassDefineReservedUnused(IOInterruptController, 0);
-OSMetaClassDefineReservedUnused(IOInterruptController, 1);
-OSMetaClassDefineReservedUnused(IOInterruptController, 2);
+OSMetaClassDefineReservedUsedX86(IOInterruptController, 0);
+OSMetaClassDefineReservedUsedX86(IOInterruptController, 1);
+OSMetaClassDefineReservedUsedX86(IOInterruptController, 2);
OSMetaClassDefineReservedUnused(IOInterruptController, 3);
OSMetaClassDefineReservedUnused(IOInterruptController, 4);
OSMetaClassDefineReservedUnused(IOInterruptController, 5);
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-IOReturn IOInterruptController::registerInterrupt(IOService *nub, int source,
- void *target,
- IOInterruptHandler handler,
- void *refCon)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- long wasDisabledSoft;
- IOReturn error;
- OSData *vectorData;
- IOService *originalNub;
- int originalSource;
- IOOptionBits options;
- bool canBeShared, shouldBeShared, wasAlreadyRegisterd;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- // Get the lock for this vector.
- IOTakeLock(vector->interruptLock);
-
- // Check if the interrupt source can/should be shared.
- canBeShared = vectorCanBeShared(vectorNumber, vector);
- IODTGetInterruptOptions(nub, source, &options);
- shouldBeShared = canBeShared && (options & kIODTInterruptShared);
- wasAlreadyRegisterd = vector->interruptRegistered;
-
- // If the vector is registered and can not be shared return error.
- if (wasAlreadyRegisterd && !canBeShared) {
- IOUnlock(vector->interruptLock);
- return kIOReturnNoResources;
- }
-
- // 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 (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);
- return kIOReturnNoMemory;
- }
-
- 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.
+IOReturn
+IOInterruptController::registerInterrupt(IOService *nub, int source,
+ void *target,
+ IOInterruptHandler handler,
+ void *refCon)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ int wasDisabledSoft;
+ IOReturn error;
+ OSData *vectorData;
+ 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 = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ // Get the lock for this vector.
+ 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 (implied),
+ // or it is not registered and should be shared,
+ // register as a shared interrupt.
+ if (wasAlreadyRegisterd || shouldBeShared) {
+ // If this vector is not already shared, break it out.
+ if (vector->sharedController == NULL) {
+ // Make the IOShareInterruptController instance
+ vector->sharedController = new IOSharedInterruptController;
+ if (vector->sharedController == NULL) {
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnNoMemory;
+ }
+
+ 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);
+ // If the IOSharedInterruptController could not be initalized,
+ // if needed, put the original consumer's interrupt back to normal and
+ // get rid of whats left of the shared controller.
+ if (error != kIOReturnSuccess) {
+ if (wasAlreadyRegisterd) {
+ enableInterrupt(originalNub, originalSource);
+ }
+ vector->sharedController->release();
+ vector->sharedController = NULL;
+ IOLockUnlock(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 = NULL;
+ IOLockUnlock(vector->interruptLock);
+ return error;
+ }
+ }
+
+ // Fill in vector with the shared controller's info.
+ vector->handler = (IOInterruptHandler)vector->sharedController->getInterruptHandlerAddress();
+ vector->nub = vector->sharedController;
+ vector->source = 0;
+ vector->target = vector->sharedController;
+ vector->refCon = NULL;
+
+ // 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);
+ IOLockUnlock(vector->interruptLock);
+ return error;
+ }
+
+ // Fill in vector with the client's info.
+ vector->handler = handler;
+ vector->nub = nub;
+ vector->source = source;
+ vector->target = target;
+ vector->refCon = refCon;
+
+ // Do any specific initalization for this vector.
+ initVector(vectorNumber, vector);
+
+ // Get the vector ready. It starts hard disabled.
+ vector->interruptDisabledHard = 1;
+ vector->interruptDisabledSoft = 1;
+ vector->interruptRegistered = 1;
+
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOInterruptController::unregisterInterrupt(IOService *nub, int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ // Get the lock for this vector.
+ IOLockLock(vector->interruptLock);
+
+ // Return success if it is not already registered
+ if (!vector->interruptRegistered) {
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnSuccess;
+ }
+
+ // Soft disable the source.
+ disableInterrupt(nub, source);
+
+ // Turn the source off at hardware.
disableVectorHard(vectorNumber, vector);
+
+ // Clear all the storage for the vector except for interruptLock.
+ vector->interruptActive = 0;
+ vector->interruptDisabledSoft = 0;
vector->interruptDisabledHard = 0;
- }
-
- // Initialize the new shared interrupt controller.
- error = vector->sharedController->initInterruptController(this, vectorData);
- // If the IOSharedInterruptController could not be initalized,
- // if needed, put the original consumer's interrupt back to normal and
- // get rid of whats left of the shared controller.
- if (error != kIOReturnSuccess) {
- if (wasAlreadyRegisterd) 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;
- IOUnlock(vector->interruptLock);
- return error;
- }
- }
-
- // Fill in vector with the shared controller's info.
- vector->handler = (IOInterruptHandler)vector->sharedController->getInterruptHandlerAddress();
- vector->nub = vector->sharedController;
- vector->source = 0;
- 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.
- if (!wasDisabledSoft) originalNub->enableInterrupt(originalSource);
- }
-
- error = vector->sharedController->registerInterrupt(nub, source, target,
- handler, refCon);
- IOUnlock(vector->interruptLock);
- return error;
- }
-
- // Fill in vector with the client's info.
- vector->handler = handler;
- vector->nub = nub;
- vector->source = source;
- vector->target = target;
- vector->refCon = refCon;
-
- // Do any specific initalization for this vector.
- initVector(vectorNumber, vector);
-
- // Get the vector ready. It starts hard disabled.
- vector->interruptDisabledHard = 1;
- vector->interruptDisabledSoft = 1;
- vector->interruptRegistered = 1;
-
- IOUnlock(vector->interruptLock);
- return kIOReturnSuccess;
-}
-
-IOReturn IOInterruptController::unregisterInterrupt(IOService *nub, int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
-
- 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;
- }
-
- // Soft disable the source.
- disableInterrupt(nub, source);
-
- // Turn the source off at hardware.
- disableVectorHard(vectorNumber, vector);
-
- // 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;
-
- IOUnlock(vector->interruptLock);
- return kIOReturnSuccess;
-}
-
-IOReturn IOInterruptController::getInterruptType(IOService *nub, int source,
- int *interruptType)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
-
- if (interruptType == 0) return kIOReturnBadArgument;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- *interruptType = getVectorType(vectorNumber, vector);
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOInterruptController::enableInterrupt(IOService *nub, int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- if (vector->interruptDisabledSoft) {
- vector->interruptDisabledSoft = 0;
-#if __ppc__
- sync();
- isync();
+ vector->interruptRegistered = 0;
+ vector->nub = NULL;
+ vector->source = 0;
+ vector->handler = NULL;
+ vector->target = NULL;
+ vector->refCon = NULL;
+
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOInterruptController::getInterruptType(IOService *nub, int source,
+ int *interruptType)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+
+ if (interruptType == NULL) {
+ return kIOReturnBadArgument;
+ }
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ *interruptType = getVectorType(vectorNumber, vector);
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOInterruptController::enableInterrupt(IOService *nub, int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ if (vector->interruptDisabledSoft) {
+ vector->interruptDisabledSoft = 0;
+#if !defined(__i386__) && !defined(__x86_64__)
+ OSMemoryBarrier();
#endif
-
- if (!getPlatform()->atInterruptLevel()) {
- while (vector->interruptActive);
-#if __ppc__
- isync();
+
+ if (!getPlatform()->atInterruptLevel()) {
+ while (vector->interruptActive) {
+ }
+ }
+ if (vector->interruptDisabledHard) {
+ vector->interruptDisabledHard = 0;
+
+ // A DSB ISH on ARM is needed to make sure the vector data are
+ // properly initialized before the MMIO enabling the interrupts
+ // in hardware. OSMemoryBarrier(), which maps to DMB, is not
+ // sufficient here as the CPUs are not consumers of the device
+ // write. Hence, the DMB does not guarantee the CPUs won't see an
+ // interrupt before it initalizes the vector data properly.
+ OSSynchronizeIO();
+
+ enableVector(vectorNumber, vector);
+ }
+ }
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOInterruptController::disableInterrupt(IOService *nub, int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ vector->interruptDisabledSoft = 1;
+#if !defined(__i386__) && !defined(__x86_64__)
+ OSMemoryBarrier();
#endif
- }
- if (vector->interruptDisabledHard) {
- vector->interruptDisabledHard = 0;
-
- enableVector(vectorNumber, vector);
- }
- }
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOInterruptController::disableInterrupt(IOService *nub, int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- vector->interruptDisabledSoft = 1;
-#if __ppc__
- sync();
- isync();
+
+ if (!getPlatform()->atInterruptLevel()) {
+ while (vector->interruptActive) {
+ }
+ }
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOInterruptController::causeInterrupt(IOService *nub, int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ causeVector(vectorNumber, vector);
+
+ return kIOReturnSuccess;
+}
+
+IOInterruptAction
+IOInterruptController::getInterruptHandlerAddress(void)
+{
+ return NULL;
+}
+
+IOReturn
+IOInterruptController::handleInterrupt(void *refCon, IOService *nub,
+ int source)
+{
+ return kIOReturnInvalid;
+}
+
+
+// Methods to be overridden for simplifed interrupt controller subclasses.
+
+bool
+IOInterruptController::vectorCanBeShared(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+ return false;
+}
+
+void
+IOInterruptController::initVector(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+}
+
+int
+IOInterruptController::getVectorType(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+ return kIOInterruptTypeEdge;
+}
+
+void
+IOInterruptController::disableVectorHard(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+}
+
+void
+IOInterruptController::enableVector(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+}
+
+void
+IOInterruptController::causeVector(IOInterruptVectorNumber /*vectorNumber*/,
+ IOInterruptVector */*vector*/)
+{
+}
+
+void
+IOInterruptController::setCPUInterruptProperties(IOService */*service*/)
+{
+}
+
+void
+IOInterruptController::sendIPI(unsigned int /*cpu_id*/, bool /*deferred*/)
+{
+}
+
+void
+IOInterruptController::cancelDeferredIPI(unsigned int /*cpu_id*/)
+{
+}
+
+void
+IOInterruptController::timeStampSpuriousInterrupt(void)
+{
+ uint64_t providerID = 0;
+ IOService * provider = getProvider();
+
+ if (provider) {
+ providerID = provider->getRegistryEntryID();
+ }
+
+ IOTimeStampConstant(IODBG_INTC(IOINTC_SPURIOUS), providerID);
+}
+
+void
+IOInterruptController::timeStampInterruptHandlerInternal(bool isStart, IOInterruptVectorNumber vectorNumber, IOInterruptVector *vector)
+{
+ uint64_t providerID = 0;
+ vm_offset_t unslidHandler = 0;
+ vm_offset_t unslidTarget = 0;
+
+ IOService * provider = getProvider();
+
+ if (provider) {
+ providerID = provider->getRegistryEntryID();
+ }
+
+ if (vector) {
+ unslidHandler = VM_KERNEL_UNSLIDE((vm_offset_t)vector->handler);
+ unslidTarget = VM_KERNEL_UNSLIDE_OR_PERM((vm_offset_t)vector->target);
+ }
+
+
+ if (isStart) {
+#if SCHED_HYGIENE_DEBUG
+ ml_irq_debug_start((uintptr_t)vector->handler, (uintptr_t)vector);
#endif
-
- if (!getPlatform()->atInterruptLevel()) {
- while (vector->interruptActive);
-#if __ppc__
- isync();
+ IOTimeStampStartConstant(IODBG_INTC(IOINTC_HANDLER), (uintptr_t)vectorNumber, (uintptr_t)unslidHandler,
+ (uintptr_t)unslidTarget, (uintptr_t)providerID);
+ } else {
+ IOTimeStampEndConstant(IODBG_INTC(IOINTC_HANDLER), (uintptr_t)vectorNumber, (uintptr_t)unslidHandler,
+ (uintptr_t)unslidTarget, (uintptr_t)providerID);
+#if SCHED_HYGIENE_DEBUG
+ ml_irq_debug_end();
#endif
- }
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOInterruptController::causeInterrupt(IOService *nub, int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- causeVector(vectorNumber, vector);
-
- return kIOReturnSuccess;
-}
-
-IOInterruptAction IOInterruptController::getInterruptHandlerAddress(void)
-{
- return 0;
-}
-
-IOReturn IOInterruptController::handleInterrupt(void *refCon, IOService *nub,
- int source)
-{
- return kIOReturnInvalid;
-}
-
-
-// Methods to be overridden for simplifed interrupt controller subclasses.
-
-bool IOInterruptController::vectorCanBeShared(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
- return false;
-}
-
-void IOInterruptController::initVector(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
-}
-
-int IOInterruptController::getVectorType(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
- return kIOInterruptTypeEdge;
-}
-
-void IOInterruptController::disableVectorHard(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
-}
-
-void IOInterruptController::enableVector(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
-}
-
-void IOInterruptController::causeVector(long /*vectorNumber*/,
- IOInterruptVector */*vector*/)
-{
-}
-
+ }
+}
+
+void
+IOInterruptController::timeStampInterruptHandlerStart(IOInterruptVectorNumber vectorNumber, IOInterruptVector *vector)
+{
+ timeStampInterruptHandlerInternal(true, vectorNumber, vector);
+}
+
+void
+IOInterruptController::timeStampInterruptHandlerEnd(IOInterruptVectorNumber vectorNumber, IOInterruptVector *vector)
+{
+ timeStampInterruptHandlerInternal(false, vectorNumber, vector);
+}
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
@@ -416,306 +521,333 @@
#define kIOSharedInterruptControllerDefaultVectors (128)
-IOReturn IOSharedInterruptController::initInterruptController(IOInterruptController *parentController, OSData *parentSource)
-{
- int cnt, interruptType;
- IOReturn error;
-
- if (!super::init())
- return kIOReturnNoResources;
-
- // Set provider to this so enable/disable nub stuff works.
- provider = this;
-
- // Allocate the IOInterruptSource so this can act like a nub.
- _interruptSources = (IOInterruptSource *)IOMalloc(sizeof(IOInterruptSource));
- if (_interruptSources == 0) return kIOReturnNoMemory;
- _numInterruptSources = 1;
-
- // Set up the IOInterruptSource to point at this.
- parentController->retain();
- parentSource->retain();
- _interruptSources[0].interruptController = parentController;
- _interruptSources[0].vectorData = parentSource;
-
- sourceIsLevel = false;
- error = provider->getInterruptType(0, &interruptType);
- if (error == kIOReturnSuccess) {
- if (interruptType & kIOInterruptTypeLevel)
- sourceIsLevel = true;
- }
-
- // Allocate the memory for the vectors
- numVectors = kIOSharedInterruptControllerDefaultVectors; // For now a constant number.
- vectors = (IOInterruptVector *)IOMalloc(numVectors * sizeof(IOInterruptVector));
- if (vectors == NULL) {
- IOFree(_interruptSources, sizeof(IOInterruptSource));
- return kIOReturnNoMemory;
- }
- bzero(vectors, numVectors * sizeof(IOInterruptVector));
-
- // Allocate the lock for the controller.
- controllerLock = IOSimpleLockAlloc();
- if (controllerLock == 0) return kIOReturnNoResources;
-
- // Allocate locks for the vectors.
- for (cnt = 0; cnt < numVectors; cnt++) {
- vectors[cnt].interruptLock = IOLockAlloc();
- if (vectors[cnt].interruptLock == NULL) {
- for (cnt = 0; cnt < numVectors; cnt++) {
- if (vectors[cnt].interruptLock != NULL)
- IOLockFree(vectors[cnt].interruptLock);
- }
- return kIOReturnNoResources;
- }
- }
-
- numVectors = 0; // reset the high water mark for used vectors
- vectorsRegistered = 0;
- vectorsEnabled = 0;
- controllerDisabled = 1;
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOSharedInterruptController::registerInterrupt(IOService *nub,
- int source,
- void *target,
- IOInterruptHandler handler,
- void *refCon)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector = 0;
- OSData *vectorData;
- IOInterruptState interruptState;
-
- interruptSources = nub->_interruptSources;
-
- // Find a free vector.
- vectorNumber = kIOSharedInterruptControllerDefaultVectors;
- while (vectorsRegistered != kIOSharedInterruptControllerDefaultVectors) {
- for (vectorNumber = 0; vectorNumber < kIOSharedInterruptControllerDefaultVectors; vectorNumber++) {
- vector = &vectors[vectorNumber];
-
- // Get the lock for this vector.
- IOTakeLock(vector->interruptLock);
-
- // Is it unregistered?
- if (!vector->interruptRegistered) break;
-
- // Move along to the next one.
- IOUnlock(vector->interruptLock);
- }
-
- if (vectorNumber != kIOSharedInterruptControllerDefaultVectors) break;
- }
-
- // Could not find a free one, so give up.
- if (vectorNumber == kIOSharedInterruptControllerDefaultVectors) {
- return kIOReturnNoResources;
- }
-
- // Create the vectorData for the IOInterruptSource.
- vectorData = OSData::withBytes(&vectorNumber, sizeof(vectorNumber));
- if (vectorData == 0) {
- return kIOReturnNoMemory;
- }
-
- // Fill in the IOInterruptSource with the controller's info.
- interruptSources[source].interruptController = this;
- interruptSources[source].vectorData = vectorData;
-
- // Fill in vector with the client's info.
- vector->handler = handler;
- vector->nub = nub;
- vector->source = source;
- vector->target = target;
- vector->refCon = refCon;
-
- // Get the vector ready. It starts off soft disabled.
- vector->interruptDisabledSoft = 1;
- vector->interruptRegistered = 1;
-
- interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
- // Move the high water mark if needed
- if (++vectorsRegistered > numVectors) numVectors = vectorsRegistered;
- IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
-
- IOUnlock(vector->interruptLock);
- return kIOReturnSuccess;
-}
-
-IOReturn IOSharedInterruptController::unregisterInterrupt(IOService *nub,
- int source)
-{
- IOInterruptSource *interruptSources;
- long 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;
- }
-
- // 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);
-
- IOUnlock(vector->interruptLock);
-
- // Re-enable the controller if all vectors are enabled.
- if (vectorsEnabled == vectorsRegistered) {
- controllerDisabled = 0;
- provider->enableInterrupt(0);
- }
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOSharedInterruptController::getInterruptType(IOService */*nub*/,
- int /*source*/,
- int *interruptType)
-{
- return provider->getInterruptType(0, interruptType);
-}
-
-IOReturn IOSharedInterruptController::enableInterrupt(IOService *nub,
- int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
- IOInterruptState interruptState;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
- if (!vector->interruptDisabledSoft) {
- IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
- return kIOReturnSuccess;
- }
-
- vector->interruptDisabledSoft = 0;
- vectorsEnabled++;
- IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
-
- if (controllerDisabled && (vectorsEnabled == vectorsRegistered)) {
- controllerDisabled = 0;
- provider->enableInterrupt(0);
- }
-
- return kIOReturnSuccess;
-}
-
-IOReturn IOSharedInterruptController::disableInterrupt(IOService *nub,
- int source)
-{
- IOInterruptSource *interruptSources;
- long vectorNumber;
- IOInterruptVector *vector;
- OSData *vectorData;
- IOInterruptState interruptState;
-
- interruptSources = nub->_interruptSources;
- vectorData = interruptSources[source].vectorData;
- vectorNumber = *(long *)vectorData->getBytesNoCopy();
- vector = &vectors[vectorNumber];
-
- interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
- if (!vector->interruptDisabledSoft) {
- vector->interruptDisabledSoft = 1;
-#if __ppc__
- sync();
- isync();
+IOReturn
+IOSharedInterruptController::initInterruptController(IOInterruptController *parentController, OSData *parentSource)
+{
+ int cnt, interruptType;
+ IOReturn error;
+
+ if (!super::init()) {
+ return kIOReturnNoResources;
+ }
+
+ // Set provider to this so enable/disable nub stuff works.
+ provider = this;
+
+ // Allocate the IOInterruptSource so this can act like a nub.
+ _interruptSources = IONew(IOInterruptSource, 1);
+ if (_interruptSources == NULL) {
+ return kIOReturnNoMemory;
+ }
+ _numInterruptSources = 1;
+
+ // Set up the IOInterruptSource to point at this.
+ parentController->retain();
+ parentSource->retain();
+ _interruptSources[0].interruptController = parentController;
+ _interruptSources[0].vectorData = parentSource;
+
+ sourceIsLevel = false;
+ error = provider->getInterruptType(0, &interruptType);
+ if (error == kIOReturnSuccess) {
+ if (interruptType & kIOInterruptTypeLevel) {
+ sourceIsLevel = true;
+ }
+ }
+
+ // Allocate the memory for the vectors
+ numVectors = kIOSharedInterruptControllerDefaultVectors; // For now a constant number.
+ vectors = IONewZero(IOInterruptVector, numVectors);
+ if (vectors == NULL) {
+ IODelete(_interruptSources, IOInterruptSource, 1);
+ return kIOReturnNoMemory;
+ }
+
+ // Allocate the lock for the controller.
+ controllerLock = IOSimpleLockAlloc();
+ if (controllerLock == NULL) {
+ return kIOReturnNoResources;
+ }
+
+ // Allocate locks for the vectors.
+ for (cnt = 0; cnt < numVectors; cnt++) {
+ vectors[cnt].interruptLock = IOLockAlloc();
+ if (vectors[cnt].interruptLock == NULL) {
+ for (cnt = 0; cnt < numVectors; cnt++) {
+ if (vectors[cnt].interruptLock != NULL) {
+ IOLockFree(vectors[cnt].interruptLock);
+ }
+ }
+ return kIOReturnNoResources;
+ }
+ }
+
+ numVectors = 0; // reset the high water mark for used vectors
+ vectorsRegistered = 0;
+ vectorsEnabled = 0;
+ controllerDisabled = 1;
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOSharedInterruptController::registerInterrupt(IOService *nub,
+ int source,
+ void *target,
+ IOInterruptHandler handler,
+ void *refCon)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector = NULL;
+ OSData *vectorData;
+ IOInterruptState interruptState;
+
+ interruptSources = nub->_interruptSources;
+
+ // Find a free vector.
+ vectorNumber = kIOSharedInterruptControllerDefaultVectors;
+ while (vectorsRegistered != kIOSharedInterruptControllerDefaultVectors) {
+ for (vectorNumber = 0; vectorNumber < kIOSharedInterruptControllerDefaultVectors; vectorNumber++) {
+ vector = &vectors[vectorNumber];
+
+ // Get the lock for this vector.
+ IOLockLock(vector->interruptLock);
+
+ // Is it unregistered?
+ if (!vector->interruptRegistered) {
+ break;
+ }
+
+ // Move along to the next one.
+ IOLockUnlock(vector->interruptLock);
+ }
+
+ if (vectorNumber != kIOSharedInterruptControllerDefaultVectors) {
+ break;
+ }
+ }
+
+ // Could not find a free one, so give up.
+ if (vectorNumber == kIOSharedInterruptControllerDefaultVectors) {
+ return kIOReturnNoResources;
+ }
+
+ // Create the vectorData for the IOInterruptSource.
+ vectorData = OSData::withValue(vectorNumber);
+ if (vectorData == NULL) {
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnNoMemory;
+ }
+
+ // Fill in the IOInterruptSource with the controller's info.
+ interruptSources[source].interruptController = this;
+ interruptSources[source].vectorData = vectorData;
+
+ // Fill in vector with the client's info.
+ vector->handler = handler;
+ vector->nub = nub;
+ vector->source = source;
+ vector->target = target;
+ vector->refCon = refCon;
+
+ // Get the vector ready. It starts off soft disabled.
+ vector->interruptDisabledSoft = 1;
+ vector->interruptRegistered = 1;
+
+ interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
+ // Move the high water mark if needed
+ if (++vectorsRegistered > numVectors) {
+ numVectors = vectorsRegistered;
+ }
+ IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
+
+ IOLockUnlock(vector->interruptLock);
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOSharedInterruptController::unregisterInterrupt(IOService *nub,
+ int source)
+{
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ 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);
+
+ // Free vectorData
+ IOInterruptSource *interruptSources = nub->_interruptSources;
+ OSSafeReleaseNULL(interruptSources[source].vectorData);
+
+ // Clear all the storage for the vector except for interruptLock.
+ vector->interruptActive = 0;
+ vector->interruptDisabledSoft = 0;
+ vector->interruptDisabledHard = 0;
+ vector->interruptRegistered = 0;
+ vector->nub = NULL;
+ vector->source = 0;
+ vector->handler = NULL;
+ vector->target = NULL;
+ vector->refCon = NULL;
+
+ interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
+ vectorsRegistered--;
+ IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
+
+ // Move along to the next one.
+ IOLockUnlock(vector->interruptLock);
+ }
+
+ // Re-enable the controller if all vectors are enabled.
+ if (vectorsEnabled == vectorsRegistered) {
+ controllerDisabled = 0;
+ provider->enableInterrupt(0);
+ }
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOSharedInterruptController::getInterruptType(IOService */*nub*/,
+ int /*source*/,
+ int *interruptType)
+{
+ return provider->getInterruptType(0, interruptType);
+}
+
+IOReturn
+IOSharedInterruptController::enableInterrupt(IOService *nub,
+ int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+ IOInterruptState interruptState;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
+ if (!vector->interruptDisabledSoft) {
+ IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
+ return kIOReturnSuccess;
+ }
+
+ vector->interruptDisabledSoft = 0;
+ vectorsEnabled++;
+ IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
+
+ if (controllerDisabled && (vectorsEnabled == vectorsRegistered)) {
+ controllerDisabled = 0;
+ provider->enableInterrupt(0);
+ }
+
+ return kIOReturnSuccess;
+}
+
+IOReturn
+IOSharedInterruptController::disableInterrupt(IOService *nub,
+ int source)
+{
+ IOInterruptSource *interruptSources;
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+ OSData *vectorData;
+ IOInterruptState interruptState;
+
+ interruptSources = nub->_interruptSources;
+ vectorData = interruptSources[source].vectorData;
+ vectorNumber = *(IOInterruptVectorNumber *)vectorData->getBytesNoCopy();
+ vector = &vectors[vectorNumber];
+
+ interruptState = IOSimpleLockLockDisableInterrupt(controllerLock);
+ if (!vector->interruptDisabledSoft) {
+ vector->interruptDisabledSoft = 1;
+#if !defined(__i386__) && !defined(__x86_64__)
+ OSMemoryBarrier();
#endif
- vectorsEnabled--;
- }
- IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
-
- if (!getPlatform()->atInterruptLevel()) {
- while (vector->interruptActive);
-#if __ppc__
- isync();
+
+ vectorsEnabled--;
+ }
+ IOSimpleLockUnlockEnableInterrupt(controllerLock, interruptState);
+
+ if (!getPlatform()->atInterruptLevel()) {
+ while (vector->interruptActive) {
+ }
+ }
+
+ return kIOReturnSuccess;
+}
+
+IOInterruptAction
+IOSharedInterruptController::getInterruptHandlerAddress(void)
+{
+ return OSMemberFunctionCast(IOInterruptAction,
+ this, &IOSharedInterruptController::handleInterrupt);
+}
+
+IOReturn
+IOSharedInterruptController::handleInterrupt(void * /*refCon*/,
+ IOService * nub,
+ int /*source*/)
+{
+ IOInterruptVectorNumber vectorNumber;
+ IOInterruptVector *vector;
+
+ for (vectorNumber = 0; vectorNumber < numVectors; vectorNumber++) {
+ vector = &vectors[vectorNumber];
+
+ vector->interruptActive = 1;
+#if !defined(__i386__) && !defined(__x86_64__)
+ OSMemoryBarrier();
#endif
- }
-
- return kIOReturnSuccess;
-}
-
-IOInterruptAction IOSharedInterruptController::getInterruptHandlerAddress(void)
-{
- return OSMemberFunctionCast(IOInterruptAction,
- this, &IOSharedInterruptController::handleInterrupt);
-}
-
-IOReturn IOSharedInterruptController::handleInterrupt(void * /*refCon*/,
- IOService * nub,
- int /*source*/)
-{
- long 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);
- }
- }
-
- vector->interruptActive = 0;
- }
-
- // if any of the vectors are dissabled, then dissable this controller.
- IOSimpleLockLock(controllerLock);
- if (vectorsEnabled != vectorsRegistered) {
- nub->disableInterrupt(0);
- controllerDisabled = 1;
- }
- IOSimpleLockUnlock(controllerLock);
-
- return kIOReturnSuccess;
-}
-
+
+ if (!vector->interruptDisabledSoft) {
+ // Call the handler if it exists.
+ if (vector->interruptRegistered) {
+ bool trace = (gIOKitTrace & kIOTraceInterrupts) ? true : false;
+
+ if (trace) {
+ timeStampInterruptHandlerStart(vectorNumber, vector);
+ }
+
+ // Call handler.
+ vector->handler(vector->target, vector->refCon, vector->nub, vector->source);
+
+ if (trace) {
+ timeStampInterruptHandlerEnd(vectorNumber, vector);
+ }
+ }
+ }
+
+ vector->interruptActive = 0;
+ }
+
+ // if any of the vectors are dissabled, then dissable this controller.
+ IOSimpleLockLock(controllerLock);
+ if (vectorsEnabled != vectorsRegistered) {
+ nub->disableInterrupt(0);
+ controllerDisabled = 1;
+ }
+ IOSimpleLockUnlock(controllerLock);
+
+ return kIOReturnSuccess;
+}