xnu-6153.121.1.tar.gz

[apple/xnu.git] / iokit / Kernel / IOInterruptEventSource.cpp

diff --git a/iokit/Kernel/IOInterruptEventSource.cpp b/iokit/Kernel/IOInterruptEventSource.cpp
index a410de27e334983aa3ab6937109753d309754233..5decae5c62d9d3286e349539c80d97afcac7d50f 100644 (file)
--- a/iokit/Kernel/IOInterruptEventSource.cpp
+++ b/iokit/Kernel/IOInterruptEventSource.cpp
@@ -2,7 +2,7 @@
  * Copyright (c) 1998-2014 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * Copyright (c) 1998-2014 Apple 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
  * 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 +11,10 @@
  * 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.
  * 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.
  * 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,
  * 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,


@@ -22,7 +22,7 @@
  * 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.
  * 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@
  */
 
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 


@@ -72,244 +72,277 @@ OSMetaClassDefineReservedUnused(IOInterruptEventSource, 5);
 OSMetaClassDefineReservedUnused(IOInterruptEventSource, 6);
 OSMetaClassDefineReservedUnused(IOInterruptEventSource, 7);
 
 OSMetaClassDefineReservedUnused(IOInterruptEventSource, 6);
 OSMetaClassDefineReservedUnused(IOInterruptEventSource, 7);
 

-bool IOInterruptEventSource::init(OSObject *inOwner,
-                                 Action inAction,
-                                 IOService *inProvider,
-                                 int inIntIndex)
+bool
+IOInterruptEventSource::init(OSObject *inOwner,
+    Action inAction,
+    IOService *inProvider,
+    int inIntIndex)

 {
 {

-    bool res = true;
+       bool res = true;
+
+       if (!super::init(inOwner, (IOEventSourceAction) inAction)) {
+               return false;
+       }

 
 

-    if ( !super::init(inOwner, (IOEventSourceAction) inAction) )
-        return false;
+       reserved = IONew(ExpansionData, 1);

 
 

-    reserved = IONew(ExpansionData, 1);
+       if (!reserved) {
+               return false;
+       }

 
 

-    if (!reserved) {
-        return false;
-    }
+       bzero(reserved, sizeof(ExpansionData));
+
+       provider = inProvider;
+       producerCount = consumerCount = 0;
+       autoDisable = explicitDisable = false;
+       intIndex = ~inIntIndex;
+
+       // Assumes inOwner holds a reference(retain) on the provider
+       if (inProvider) {
+               if (IA_ANY_STATISTICS_ENABLED) {
+                       /*
+                        * We only treat this as an "interrupt" if it has a provider; if it does,
+                        * set up the objects necessary to track interrupt statistics.  Interrupt
+                        * event sources without providers are most likely being used as simple
+                        * event source in order to poke at workloops and kick off work.
+                        *
+                        * We also avoid try to avoid interrupt accounting overhead if none of
+                        * the statistics are enabled.
+                        */
+                       reserved->statistics = IONew(IOInterruptAccountingData, 1);
+
+                       if (!reserved->statistics) {
+                               /*
+                                * We rely on the free() routine to clean up after us if init fails
+                                * midway.
+                                */
+                               return false;
+                       }

 
 

-    bzero(reserved, sizeof(ExpansionData));
+                       bzero(reserved->statistics, sizeof(IOInterruptAccountingData));

 
 

-    provider = inProvider;
-    producerCount = consumerCount = 0;
-    autoDisable = explicitDisable = false;
-    intIndex = ~inIntIndex;
+                       reserved->statistics->owner = this;
+               }

 
 

-    // Assumes inOwner holds a reference(retain) on the provider
-    if (inProvider) {
-        if (IA_ANY_STATISTICS_ENABLED) {
-            /*
-             * We only treat this as an "interrupt" if it has a provider; if it does,
-             * set up the objects necessary to track interrupt statistics.  Interrupt
-             * event sources without providers are most likely being used as simple
-             * event source in order to poke at workloops and kick off work.
-             *
-             * We also avoid try to avoid interrupt accounting overhead if none of
-             * the statistics are enabled.
-             */
-            reserved->statistics = IONew(IOInterruptAccountingData, 1);
+               res = (kIOReturnSuccess == registerInterruptHandler(inProvider, inIntIndex));

 
 

-            if (!reserved->statistics) {
-                /*
-                 * We rely on the free() routine to clean up after us if init fails
-                 * midway.
-                 */
-                return false;
-            }
+               if (res) {
+                       intIndex = inIntIndex;
+               }
+       }

 
 

-            bzero(reserved->statistics, sizeof(IOInterruptAccountingData));
+       IOStatisticsInitializeCounter();

 
 

-            reserved->statistics->owner = this;
-        }
+       return res;
+}

 
 

-        res = (kIOReturnSuccess == registerInterruptHandler(inProvider, inIntIndex));
+IOReturn
+IOInterruptEventSource::registerInterruptHandler(IOService *inProvider,
+    int inIntIndex)
+{
+       IOReturn ret;
+       int intType;
+       IOInterruptAction intHandler;

 
 

-       if (res) {
-           intIndex = inIntIndex;
-        }
-    }
+       ret = inProvider->getInterruptType(inIntIndex, &intType);
+       if (kIOReturnSuccess != ret) {
+               return ret;
+       }

 
 

-    IOStatisticsInitializeCounter();
+       autoDisable = (intType == kIOInterruptTypeLevel);
+       if (autoDisable) {
+               intHandler = OSMemberFunctionCast(IOInterruptAction,
+                   this, &IOInterruptEventSource::disableInterruptOccurred);
+       } else {
+               intHandler = OSMemberFunctionCast(IOInterruptAction,
+                   this, &IOInterruptEventSource::normalInterruptOccurred);
+       }

 
 

-    return res;
-}
+       ret = provider->registerInterrupt(inIntIndex, this, intHandler);
+
+       /*
+        * Add statistics to the provider.  The setWorkLoop convention should ensure
+        * that we always go down the unregister path before we register (outside of
+        * init()), so we don't have to worry that we will invoke addInterruptStatistics
+        * erroneously.
+        */
+       if ((ret == kIOReturnSuccess) && (reserved->statistics)) {
+               /*
+                * Stash the normal index value, for the sake of debugging.
+                */
+               reserved->statistics->interruptIndex = inIntIndex;
+
+               /*
+                * We need to hook the interrupt information up to the provider so that it
+                * can find the statistics for this interrupt when desired.  The provider is
+                * responsible for maintaining the reporter for a particular interrupt, and
+                * needs a handle on the statistics so that it can request that the reporter
+                * be updated as needed.  Errors are considered "soft" for the moment (it
+                * will either panic, or fail in a way such that we can still service the
+                * interrupt).
+                */
+               provider->addInterruptStatistics(reserved->statistics, inIntIndex);
+
+               /*
+                * Add the statistics object to the global list of statistics objects; this
+                * is an aid to debugging (we can trivially find statistics for all eligible
+                * interrupts, and dump them; potentially helpful if the system is wedged
+                * due to interrupt activity).
+                */
+               interruptAccountingDataAddToList(reserved->statistics);
+       }

 
 

-IOReturn IOInterruptEventSource::registerInterruptHandler(IOService *inProvider,
-                                 int inIntIndex)
-{
-    IOReturn ret;
-    int intType;
-    IOInterruptAction intHandler;
-
-    ret = inProvider->getInterruptType(inIntIndex, &intType);
-    if (kIOReturnSuccess != ret)
-       return (ret);
-
-    autoDisable = (intType == kIOInterruptTypeLevel);
-    if (autoDisable) {
-       intHandler = OSMemberFunctionCast(IOInterruptAction,
-           this, &IOInterruptEventSource::disableInterruptOccurred);
-    }
-    else
-       intHandler = OSMemberFunctionCast(IOInterruptAction,
-           this, &IOInterruptEventSource::normalInterruptOccurred);
-
-    ret = provider->registerInterrupt(inIntIndex, this, intHandler);
-
-    /*
-     * Add statistics to the provider.  The setWorkLoop convention should ensure
-     * that we always go down the unregister path before we register (outside of
-     * init()), so we don't have to worry that we will invoke addInterruptStatistics
-     * erroneously.
-     */
-    if ((ret == kIOReturnSuccess) && (reserved->statistics)) {
-        /*
-         * Stash the normal index value, for the sake of debugging.
-         */
-        reserved->statistics->interruptIndex = inIntIndex;
-
-        /*
-         * We need to hook the interrupt information up to the provider so that it
-         * can find the statistics for this interrupt when desired.  The provider is
-         * responsible for maintaining the reporter for a particular interrupt, and
-         * needs a handle on the statistics so that it can request that the reporter
-         * be updated as needed.  Errors are considered "soft" for the moment (it
-         * will either panic, or fail in a way such that we can still service the
-         * interrupt).
-         */
-        provider->addInterruptStatistics(reserved->statistics, inIntIndex);
-
-        /*
-         * Add the statistics object to the global list of statistics objects; this
-         * is an aid to debugging (we can trivially find statistics for all eligible
-         * interrupts, and dump them; potentially helpful if the system is wedged
-         * due to interrupt activity).
-         */
-        interruptAccountingDataAddToList(reserved->statistics);
-    }
-
-    return (ret);
+       return ret;

 }
 
 void
 IOInterruptEventSource::unregisterInterruptHandler(IOService *inProvider,
 }
 
 void
 IOInterruptEventSource::unregisterInterruptHandler(IOService *inProvider,

-                                 int inIntIndex)
+    int inIntIndex)

 {
 {

-    if (reserved->statistics) {
-        interruptAccountingDataRemoveFromList(reserved->statistics);
-        provider->removeInterruptStatistics(reserved->statistics->interruptIndex);
-    }
+       if (reserved->statistics) {
+               interruptAccountingDataRemoveFromList(reserved->statistics);
+               provider->removeInterruptStatistics(reserved->statistics->interruptIndex);
+       }

 
 

-    provider->unregisterInterrupt(inIntIndex);
+       provider->unregisterInterrupt(inIntIndex);

 }
 
 
 IOInterruptEventSource *
 IOInterruptEventSource::interruptEventSource(OSObject *inOwner,
 }
 
 
 IOInterruptEventSource *
 IOInterruptEventSource::interruptEventSource(OSObject *inOwner,

-                                            Action inAction,
-                                            IOService *inProvider,
-                                            int inIntIndex)
+    Action inAction,
+    IOService *inProvider,
+    int inIntIndex)

 {
 {

-    IOInterruptEventSource *me = new IOInterruptEventSource;
+       IOInterruptEventSource *me = new IOInterruptEventSource;
+
+       if (me && !me->init(inOwner, inAction, inProvider, inIntIndex)) {
+               me->release();
+               return NULL;
+       }

 
 

-    if (me && !me->init(inOwner, inAction, inProvider, inIntIndex)) {
-        me->release();
-        return 0;
-    }
+       return me;
+}
+
+IOInterruptEventSource *
+IOInterruptEventSource::interruptEventSource(OSObject *inOwner,
+    IOService *inProvider,
+    int inIntIndex,
+    ActionBlock inAction)
+{
+       IOInterruptEventSource * ies;
+       ies = IOInterruptEventSource::interruptEventSource(inOwner, (Action) NULL, inProvider, inIntIndex);
+       if (ies) {
+               ies->setActionBlock((IOEventSource::ActionBlock) inAction);
+       }

 
 

-    return me;
+       return ies;

 }
 
 }
 

-void IOInterruptEventSource::free()
+void
+IOInterruptEventSource::free()

 {
 {

-    if (provider && intIndex >= 0)
-        unregisterInterruptHandler(provider, intIndex);
+       if (provider && intIndex >= 0) {
+               unregisterInterruptHandler(provider, intIndex);
+       }

 
 

-    if (reserved) {
-        if (reserved->statistics) {
-            IODelete(reserved->statistics, IOInterruptAccountingData, 1);
-        }
+       if (reserved) {
+               if (reserved->statistics) {
+                       IODelete(reserved->statistics, IOInterruptAccountingData, 1);
+               }

 
 

-        IODelete(reserved, ExpansionData, 1);
-    }
+               IODelete(reserved, ExpansionData, 1);
+       }

 
 

-    super::free();
+       super::free();

 }
 
 }
 

-void IOInterruptEventSource::enable()
+void
+IOInterruptEventSource::enable()

 {
 {

-    if (provider && intIndex >= 0) {
-        provider->enableInterrupt(intIndex);
-        explicitDisable = false;
-        enabled = true;
-    }
+       if (provider && intIndex >= 0) {
+               provider->enableInterrupt(intIndex);
+               explicitDisable = false;
+               enabled = true;
+       }

 }
 
 }
 

-void IOInterruptEventSource::disable()
+void
+IOInterruptEventSource::disable()

 {
 {

-    if (provider && intIndex >= 0) {
-        provider->disableInterrupt(intIndex);
-        explicitDisable = true;
-        enabled = false;
-    }
+       if (provider && intIndex >= 0) {
+               provider->disableInterrupt(intIndex);
+               explicitDisable = true;
+               enabled = false;
+       }

 }
 
 }
 

-void IOInterruptEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)
+void
+IOInterruptEventSource::setWorkLoop(IOWorkLoop *inWorkLoop)

 {
 {

-    if (inWorkLoop) super::setWorkLoop(inWorkLoop);
+       if (inWorkLoop) {
+               super::setWorkLoop(inWorkLoop);
+       }

 
 

-    if (provider) {
-       if (!inWorkLoop) {
-           if (intIndex >= 0) {
-                /*
-                 * It isn't necessarily safe to wait until free() to unregister the interrupt;
-                 * our provider may disappear.
-                 */
-                unregisterInterruptHandler(provider, intIndex);
-               intIndex = ~intIndex;
-           }
-       } else if ((intIndex < 0) && (kIOReturnSuccess == registerInterruptHandler(provider, ~intIndex))) {
-           intIndex = ~intIndex;
+       if (provider) {
+               if (!inWorkLoop) {
+                       if (intIndex >= 0) {
+                               /*
+                                * It isn't necessarily safe to wait until free() to unregister the interrupt;
+                                * our provider may disappear.
+                                */
+                               unregisterInterruptHandler(provider, intIndex);
+                               intIndex = ~intIndex;
+                       }
+               } else if ((intIndex < 0) && (kIOReturnSuccess == registerInterruptHandler(provider, ~intIndex))) {
+                       intIndex = ~intIndex;
+               }

        }
        }

-    }

 
 

-    if (!inWorkLoop) super::setWorkLoop(inWorkLoop);
+       if (!inWorkLoop) {
+               super::setWorkLoop(inWorkLoop);
+       }

 }
 
 }
 

-const IOService *IOInterruptEventSource::getProvider() const
+const IOService *
+IOInterruptEventSource::getProvider() const

 {
 {

-    return provider;
+       return provider;

 }
 
 }
 

-int IOInterruptEventSource::getIntIndex() const
+int
+IOInterruptEventSource::getIntIndex() const

 {
 {

-    return intIndex;
+       return intIndex;

 }
 
 }
 

-bool IOInterruptEventSource::getAutoDisable() const
+bool
+IOInterruptEventSource::getAutoDisable() const

 {
 {

-    return autoDisable;
+       return autoDisable;

 }
 
 }
 

-bool IOInterruptEventSource::checkForWork()
+bool
+IOInterruptEventSource::checkForWork()

 {
 {

-    uint64_t startSystemTime = 0;
-    uint64_t endSystemTime = 0;
-    uint64_t startCPUTime = 0;
-    uint64_t endCPUTime = 0;
-    unsigned int cacheProdCount = producerCount;
-    int numInts = cacheProdCount - consumerCount;
-    IOInterruptEventAction intAction = (IOInterruptEventAction) action;
+       uint64_t startSystemTime = 0;
+       uint64_t endSystemTime = 0;
+       uint64_t startCPUTime = 0;
+       uint64_t endCPUTime = 0;
+       unsigned int cacheProdCount = producerCount;
+       int numInts = cacheProdCount - consumerCount;
+       IOInterruptEventAction intAction = (IOInterruptEventAction) action;
+       ActionBlock intActionBlock = (ActionBlock) actionBlock;

        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;

-       
-    IOStatisticsCheckForWork();
-       
-       if ( numInts > 0 )
-       {
-               if (trace)
+
+       IOStatisticsCheckForWork();
+
+       if (numInts > 0) {
+               if (trace) {

                        IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
                        IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),

-                                                VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
-                                                VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+                           VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
+                           VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+               }

 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {


@@ -322,7 +355,11 @@ bool IOInterruptEventSource::checkForWork()
                }
 
                // Call the handler
                }
 
                // Call the handler

-               (*intAction)(owner, this, numInts);
+               if (kActionBlock & flags) {
+                       (intActionBlock)(this, numInts);
+               } else {
+                       (*intAction)(owner, this, numInts);
+               }

 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {


@@ -339,23 +376,23 @@ bool IOInterruptEventSource::checkForWork()
                                IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
                        }
                }
                                IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
                        }
                }

-               
-               if (trace)
+
+               if (trace) {

                        IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),
                        IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),

-                                               VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
-                                               VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
-               
+                           VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
+                           VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+               }
+

                consumerCount = cacheProdCount;
                consumerCount = cacheProdCount;

-               if (autoDisable && !explicitDisable)
+               if (autoDisable && !explicitDisable) {

                        enable();
                        enable();

-       }
-       
-       else if ( numInts < 0 )
-       {
-               if (trace)
+               }
+       } else if (numInts < 0) {
+               if (trace) {

                        IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),
                        IOTimeStampStartConstant(IODBG_INTES(IOINTES_ACTION),

-                                               VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
-                                               VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+                           VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
+                           VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+               }

 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {
 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelSystemTimeIndex)) {


@@ -366,9 +403,13 @@ bool IOInterruptEventSource::checkForWork()
                                startCPUTime = thread_get_runtime_self();
                        }
                }
                                startCPUTime = thread_get_runtime_self();
                        }
                }

-               
+

                // Call the handler
                // Call the handler

-               (*intAction)(owner, this, -numInts);
+               if (kActionBlock & flags) {
+                       (intActionBlock)(this, numInts);
+               } else {
+                       (*intAction)(owner, this, numInts);
+               }

 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {
 
                if (reserved->statistics) {
                        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingSecondLevelCountIndex)) {


@@ -385,80 +426,113 @@ bool IOInterruptEventSource::checkForWork()
                                IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
                        }
                }
                                IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingSecondLevelSystemTimeIndex], endSystemTime - startSystemTime);
                        }
                }

-               
-               if (trace)
+
+               if (trace) {

                        IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),
                        IOTimeStampEndConstant(IODBG_INTES(IOINTES_ACTION),

-                                                       VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
-                                                       VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
-               
+                           VM_KERNEL_ADDRHIDE(intAction), VM_KERNEL_ADDRHIDE(owner),
+                           VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(workLoop));
+               }
+

                consumerCount = cacheProdCount;
                consumerCount = cacheProdCount;

-               if (autoDisable && !explicitDisable)
+               if (autoDisable && !explicitDisable) {

                        enable();
                        enable();

+               }

        }
        }

-       
-    return false;
+
+       return false;

 }
 
 }
 

-void IOInterruptEventSource::normalInterruptOccurred
-    (void */*refcon*/, IOService */*prov*/, int /*source*/)
+void
+IOInterruptEventSource::normalInterruptOccurred
+(void */*refcon*/, IOService */*prov*/, int /*source*/)

 {
        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
 {
        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;

-       
-    IOStatisticsInterrupt();
-    producerCount++;
-       
-       if (trace)
-           IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
-
-    if (reserved->statistics) {
-        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
-            IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
-        }
-    }
-       
-    signalWorkAvailable();
-       
-       if (trace)
-           IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+
+       IOStatisticsInterrupt();
+       producerCount++;
+
+       if (trace) {
+               IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+       }
+
+       if (reserved->statistics) {
+               if (reserved->statistics->enablePrimaryTimestamp) {
+                       reserved->statistics->primaryTimestamp = mach_absolute_time();
+               }
+               if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+                       IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+               }
+       }
+
+       signalWorkAvailable();
+
+       if (trace) {
+               IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+       }

 }
 
 }
 

-void IOInterruptEventSource::disableInterruptOccurred
-    (void */*refcon*/, IOService *prov, int source)
+void
+IOInterruptEventSource::disableInterruptOccurred
+(void */*refcon*/, IOService *prov, int source)

 {
        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;
 {
        bool trace = (gIOKitTrace & kIOTraceIntEventSource) ? true : false;

-       
-    prov->disableInterrupt(source);    /* disable the interrupt */
-       
-    IOStatisticsInterrupt();
-    producerCount++;
-       
-       if (trace)
-           IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
-
-    if (reserved->statistics) {
-        if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
-            IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
-        }
-    }
-    
-    signalWorkAvailable();
-       
-       if (trace)
-           IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+
+       prov->disableInterrupt(source); /* disable the interrupt */
+
+       IOStatisticsInterrupt();
+       producerCount++;
+
+       if (trace) {
+               IOTimeStampStartConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+       }
+
+       if (reserved->statistics) {
+               if (reserved->statistics->enablePrimaryTimestamp) {
+                       reserved->statistics->primaryTimestamp = mach_absolute_time();
+               }
+               if (IA_GET_STATISTIC_ENABLED(kInterruptAccountingFirstLevelCountIndex)) {
+                       IA_ADD_VALUE(&reserved->statistics->interruptStatistics[kInterruptAccountingFirstLevelCountIndex], 1);
+               }
+       }
+
+       signalWorkAvailable();
+
+       if (trace) {
+               IOTimeStampEndConstant(IODBG_INTES(IOINTES_SEMA), VM_KERNEL_ADDRHIDE(this), VM_KERNEL_ADDRHIDE(owner));
+       }

 }
 
 }
 

-void IOInterruptEventSource::interruptOccurred
-    (void *refcon, IOService *prov, int source)
+void
+IOInterruptEventSource::interruptOccurred
+(void *_refcon, IOService *prov, int source)

 {
 {

-    if (autoDisable && prov)
-        disableInterruptOccurred(refcon, prov, source);
-    else
-        normalInterruptOccurred(refcon, prov, source);
+       if (autoDisable && prov) {
+               disableInterruptOccurred(_refcon, prov, source);
+       } else {
+               normalInterruptOccurred(_refcon, prov, source);
+       }

 }
 
 }
 

-IOReturn IOInterruptEventSource::warmCPU
-    (uint64_t abstime)
+IOReturn
+IOInterruptEventSource::warmCPU
+(uint64_t abstime)

 {
 {

-

        return ml_interrupt_prewarm(abstime);
 }
        return ml_interrupt_prewarm(abstime);
 }

+
+void
+IOInterruptEventSource::enablePrimaryInterruptTimestamp(bool enable)
+{
+       if (reserved->statistics) {
+               reserved->statistics->enablePrimaryTimestamp = enable;
+       }
+}
+
+uint64_t
+IOInterruptEventSource::getPimaryInterruptTimestamp()
+{
+       if (reserved->statistics && reserved->statistics->enablePrimaryTimestamp) {
+               return reserved->statistics->primaryTimestamp;
+       }
+       return -1ULL;
+}