src/mem/thread_bridge.hh

/*
 * Copyright 2022 Google, LLC.
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 * modification, are permitted provided that the following conditions are
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 * notice, this list of conditions and the following disclaimer;
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 * neither the name of the copyright holders nor the names of its
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 * this software without specific prior written permission.
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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#ifndef __MEM_THREAD_BRIDGE_HH__
#define __MEM_THREAD_BRIDGE_HH__

#include "mem/port.hh"
#include "params/ThreadBridge.hh"
#include "sim/sim_object.hh"

namespace gem5
{

class ThreadBridge : public SimObject
{
  public:
    explicit ThreadBridge(const ThreadBridgeParams &p);

    Port &getPort(const std::string &if_name,
                  PortID idx = InvalidPortID) override;

  private:
    class IncomingPort : public ResponsePort
    {
      public:
        IncomingPort(const std::string &name, ThreadBridge &device);
        AddrRangeList getAddrRanges() const override;

        // TimingResponseProtocol
        bool recvTimingReq(PacketPtr pkt) override;
        void recvRespRetry() override;

        // AtomicResponseProtocol
        Tick recvAtomicBackdoor(PacketPtr pkt,
                                MemBackdoorPtr &backdoor) override;
        Tick recvAtomic(PacketPtr pkt) override;

        // FunctionalResponseProtocol
        void recvFunctional(PacketPtr pkt) override;

      private:
        ThreadBridge &device_;
    };

    class OutgoingPort : public RequestPort
    {
      public:
        OutgoingPort(const std::string &name, ThreadBridge &device);
        void recvRangeChange() override;

        // TimingRequestProtocol
        bool recvTimingResp(PacketPtr pkt) override;
        void recvReqRetry() override;

      private:
        ThreadBridge &device_;
    };

    IncomingPort in_port_;
    OutgoingPort out_port_;
};

}  // namespace gem5
#endif  // __MEM_THREAD_BRIDGE_HH__