trace_gen.hh

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/*
 * Copyright (c) 2012-2013, 2017-2018 ARM Limited
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 *
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 * property including but not limited to intellectual property relating
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#ifndef __CPU_TRAFFIC_GEN_TRACE_GEN_HH__
#define __CPU_TRAFFIC_GEN_TRACE_GEN_HH__

#include "base/bitfield.hh"
#include "base/intmath.hh"
#include "base_gen.hh"
#include "mem/packet.hh"
#include "proto/protoio.hh"

class TraceGen : public BaseGen
{

  private:

    struct TraceElement {

        MemCmd cmd;

        Addr addr;

        Addr blocksize;

        Tick tick;

        Request::FlagsType flags;

        bool isValid() const {
            return cmd != MemCmd::InvalidCmd;
        }

        void clear() {
            cmd = MemCmd::InvalidCmd;
        }
    };

    class InputStream
    {

      private:

        ProtoInputStream trace;

      public:

        InputStream(const std::string& filename);

        void reset();

        void init();

        bool read(TraceElement& element);
    };

  public:

    TraceGen(SimObject &obj, MasterID master_id, Tick _duration,
             const std::string& trace_file, Addr addr_offset)
        : BaseGen(obj, master_id, _duration),
          trace(trace_file),
          tickOffset(0),
          addrOffset(addr_offset),
          traceComplete(false)
    {
    }

    void enter();

    PacketPtr getNextPacket();

    void exit();

    Tick nextPacketTick(bool elastic, Tick delay) const;

  private:

    InputStream trace;

    TraceElement currElement;
    TraceElement nextElement;

    mutable Tick tickOffset;

    Addr addrOffset;

    bool traceComplete;
};

#endif