ticked_object.hh

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 * Copyright (c) 2013-2014, 2017 ARM Limited
 * All rights reserved
 *
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 * not be construed as granting a license to any other intellectual
 * property including but not limited to intellectual property relating
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 * Authors: Andrew Bardsley
 */

#ifndef __SIM_TICKED_OBJECT_HH__
#define __SIM_TICKED_OBJECT_HH__

#include "sim/clocked_object.hh"

class TickedObjectParams;

class Ticked : public Serializable
{
  protected:
    ClockedObject &object;

    EventFunctionWrapper event;

    void processClockEvent();

    bool running;

    Cycles lastStopped;

  private:
    Stats::Scalar *numCyclesLocal;

  protected:
    Stats::Scalar &numCycles;

    Stats::Scalar tickCycles;

    Stats::Formula idleCycles;

  public:
    Ticked(ClockedObject &object_,
        Stats::Scalar *imported_num_cycles = NULL,
        Event::Priority priority = Event::CPU_Tick_Pri);

    virtual ~Ticked() { }

    void regStats();

    void
    start()
    {
        if (!running) {
            if (!event.scheduled())
                object.schedule(event, object.clockEdge(Cycles(1)));
            running = true;
            numCycles += cyclesSinceLastStopped();
            countCycles(cyclesSinceLastStopped());
        }
    }

    Cycles
    cyclesSinceLastStopped() const
    {
        return object.curCycle() - lastStopped;
    }

    void
    resetLastStopped()
    {
        lastStopped = object.curCycle();
    }

    void
    stop()
    {
        if (running) {
            if (event.scheduled())
                object.deschedule(event);
            running = false;
            resetLastStopped();
        }
    }

    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;

    virtual void evaluate() = 0;

    virtual void countCycles(Cycles delta) {}
};

class TickedObject : public ClockedObject, public Ticked
{
  public:
    TickedObject(const TickedObjectParams *params,
        Event::Priority priority = Event::CPU_Tick_Pri);

    using ClockedObject::regStats;
    using ClockedObject::serialize;
    using ClockedObject::unserialize;

    void regStats() override;
    void serialize(CheckpointOut &cp) const override;
    void unserialize(CheckpointIn &cp) override;
};

#endif /* __SIM_TICKED_OBJECT_HH__ */