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:

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

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

        Tick
        recvAtomicBackdoor(PacketPtr pkt, MemBackdoorPtr &backdoor) override
        {
            return xbar.recvAtomicBackdoor(pkt, id, &backdoor);
        }

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

        AddrRangeList
        getAddrRanges() const override
        {
            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:

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

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

        void
        recvReqRetry() override
        {
            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 recvAtomicBackdoor(PacketPtr pkt, PortID slave_port_id,
                            MemBackdoorPtr *backdoor=nullptr);
    void recvFunctional(PacketPtr pkt, PortID slave_port_id);

  public:

    NoncoherentXBar(const NoncoherentXBarParams *p);

    virtual ~NoncoherentXBar();
};

#endif //__MEM_NONCOHERENT_XBAR_HH__