mips, x86: Refactor some Event subclasses into lambdas

Change-Id: I09570e569efe55f5502bc201e03456738999e714
Signed-off-by: Sean Wilson <spwilson2@wisc.edu>
Reviewed-on: https://gem5-review.googlesource.com/3920
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>

src/arch/mips/isa.cc

@@ -523,7 +523,9 @@ ISA::scheduleCP0Update(BaseCPU *cpu, Cycles delay)
         cp0Updated = true;
 
         //schedule UPDATE
-        CP0Event *cp0_event = new CP0Event(this, cpu, UpdateCP0);
+        auto cp0_event = new EventFunctionWrapper(
+            [this, cpu]{ processCP0Event(cpu, UpdateCP0); },
+            "Coprocessor-0 event", true, Event::CPU_Tick_Pri);
         cpu->schedule(cp0_event, cpu->clockEdge(delay));
     }
 }
@@ -557,40 +559,17 @@ ISA::updateCPU(BaseCPU *cpu)
     cp0Updated = false;
 }
 
-ISA::CP0Event::CP0Event(CP0 *_cp0, BaseCPU *_cpu, CP0EventType e_type)
-    : Event(CPU_Tick_Pri), cp0(_cp0), cpu(_cpu), cp0EventType(e_type)
-{  }
-
 void
-ISA::CP0Event::process()
+ISA::processCP0Event(BaseCPU *cpu, CP0EventType cp0EventType)
 {
     switch (cp0EventType)
     {
       case UpdateCP0:
-        cp0->updateCPU(cpu);
+        updateCPU(cpu);
         break;
     }
 }
 
-const char *
-ISA::CP0Event::description() const
-{
-    return "Coprocessor-0 event";
-}
-
-void
-ISA::CP0Event::scheduleEvent(Cycles delay)
-{
-    cpu->reschedule(this, cpu->clockEdge(delay), true);
-}
-
-void
-ISA::CP0Event::unscheduleEvent()
-{
-    if (scheduled())
-        squash();
-}
-
 }
 
 MipsISA::ISA *

src/arch/mips/isa.hh

@@ -118,31 +118,8 @@ namespace MipsISA
             UpdateCP0
         };
 
-        // Declare A CP0Event Class for scheduling
-        class CP0Event : public Event
-        {
-          protected:
-            ISA::CP0 *cp0;
-            BaseCPU *cpu;
-            CP0EventType cp0EventType;
-            Fault fault;
-
-          public:
-            /** Constructs a CP0 event. */
-            CP0Event(CP0 *_cp0, BaseCPU *_cpu, CP0EventType e_type);
-
-            /** Process this event. */
-            virtual void process();
-
-            /** Returns the description of this event. */
-            const char *description() const;
-
-            /** Schedule This Event */
-            void scheduleEvent(Cycles delay);
-
-            /** Unschedule This Event */
-            void unscheduleEvent();
-        };
+        /** Process a CP0 event */
+        void processCP0Event(BaseCPU *cpu, CP0EventType);
 
         // Schedule a CP0 Update Event
         void scheduleCP0Update(BaseCPU *cpu, Cycles delay = Cycles(0));
@@ -151,9 +128,6 @@ namespace MipsISA
         // and if necessary alert the CPU
         void updateCPU(BaseCPU *cpu);
 
-        // Keep a List of CPU Events that need to be deallocated
-        std::queue<CP0Event*> cp0EventRemoveList;
-
         static std::string miscRegNames[NumMiscRegs];
 
       public:

src/arch/x86/interrupts.cc

@@ -588,7 +588,7 @@ X86ISA::Interrupts::setReg(ApicRegIndex reg, uint32_t val)
 
 X86ISA::Interrupts::Interrupts(Params * p)
     : BasicPioDevice(p, PageBytes), IntDevice(this, p->int_latency),
-      apicTimerEvent(this),
+      apicTimerEvent([this]{ processApicTimerEvent(); }, name()),
       pendingSmi(false), smiVector(0),
       pendingNmi(false), nmiVector(0),
       pendingExtInt(false), extIntVector(0),
@@ -767,3 +767,9 @@ X86LocalApicParams::create()
 {
     return new X86ISA::Interrupts(this);
 }
+
+void
+X86ISA::Interrupts::processApicTimerEvent() {
+    if (triggerTimerInterrupt())
+        setReg(APIC_INITIAL_COUNT, readReg(APIC_INITIAL_COUNT));
+}

src/arch/x86/interrupts.hh

@@ -92,26 +92,8 @@ class Interrupts : public BasicPioDevice, IntDevice
     /*
      * Timing related stuff.
      */
-    class ApicTimerEvent : public Event
-    {
-      private:
-        Interrupts *localApic;
-      public:
-        ApicTimerEvent(Interrupts *_localApic) :
-            Event(), localApic(_localApic)
-        {}
-
-        void process()
-        {
-            assert(localApic);
-            if (localApic->triggerTimerInterrupt()) {
-                localApic->setReg(APIC_INITIAL_COUNT,
-                        localApic->readReg(APIC_INITIAL_COUNT));
-            }
-        }
-    };
-
-    ApicTimerEvent apicTimerEvent;
+    EventFunctionWrapper apicTimerEvent;
+    void processApicTimerEvent();
 
     /*
      * A set of variables to keep track of interrupts that don't go through