noncoherent_xbar.hh

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 * Authors: Ron Dreslinski
 *          Ali Saidi
 *          Andreas Hansson
 *          William Wang
 */

#ifndef __MEM_NONCOHERENT_XBAR_HH__
#define __MEM_NONCOHERENT_XBAR_HH__

#include "mem/xbar.hh"
#include "params/NoncoherentXBar.hh"

class NoncoherentXBar : public BaseXBar
{

  protected:

    std::vector<ReqLayer*> reqLayers;
    std::vector<RespLayer*> respLayers;

    class NoncoherentXBarSlavePort : public QueuedSlavePort
    {
      private:

        NoncoherentXBar &xbar;

        RespPacketQueue queue;

      public:

        NoncoherentXBarSlavePort(const std::string &_name,
                                NoncoherentXBar &_xbar, PortID _id)
            : QueuedSlavePort(_name, &_xbar, queue, _id), xbar(_xbar),
              queue(_xbar, *this)
        { }

      protected:

        virtual bool recvTimingReq(PacketPtr pkt)
        { return xbar.recvTimingReq(pkt, id); }

        virtual Tick recvAtomic(PacketPtr pkt)
        { return xbar.recvAtomic(pkt, id); }

        virtual void recvFunctional(PacketPtr pkt)
        { xbar.recvFunctional(pkt, id); }

        virtual AddrRangeList getAddrRanges() const
        { return xbar.getAddrRanges(); }

    };

    class NoncoherentXBarMasterPort : public MasterPort
    {
      private:

        NoncoherentXBar &xbar;

      public:

        NoncoherentXBarMasterPort(const std::string &_name,
                                 NoncoherentXBar &_xbar, PortID _id)
            : MasterPort(_name, &_xbar, _id), xbar(_xbar)
        { }

      protected:

        virtual bool recvTimingResp(PacketPtr pkt)
        { return xbar.recvTimingResp(pkt, id); }

        virtual void recvRangeChange()
        { xbar.recvRangeChange(id); }

        virtual void recvReqRetry()
        { xbar.recvReqRetry(id); }

    };

    virtual bool recvTimingReq(PacketPtr pkt, PortID slave_port_id);

    virtual bool recvTimingResp(PacketPtr pkt, PortID master_port_id);

    void recvReqRetry(PortID master_port_id);

    Tick recvAtomic(PacketPtr pkt, PortID slave_port_id);

    void recvFunctional(PacketPtr pkt, PortID slave_port_id);

  public:

    NoncoherentXBar(const NoncoherentXBarParams *p);

    virtual ~NoncoherentXBar();

    virtual void regStats();
    Stats::Scalar totPktSize;
};

#endif //__MEM_NONCOHERENT_XBAR_HH__