.RxData(RxData),                      .RxValid(RxValid),                    .RxStartFrm(RxStartFrm),   .RxEndFrm(RxEndFrm),                  .ByteCnt(RxByteCnt),   .ByteCntEq0(RxByteCntEq0),            .ByteCntGreat2(RxByteCntGreat2),      .ByteCntMaxFrame(RxByteCntMaxFrame),   .CrcError(RxCrcError),                .StateIdle(RxStateIdle),              .StatePreamble(RxStatePreamble),   .StateSFD(RxStateSFD),                .StateData(RxStateData),  .MAC(r_MAC),                          .r_Pro(r_Pro),                        .r_Bro(r_Bro),  .r_HASH0(r_HASH0),                    .r_HASH1(r_HASH1),                    .RxAbort(RxAbort),   .AddressMiss(AddressMiss),            .PassAll(r_PassAll),                  .ControlFrmAddressOK(ControlFrmAddressOK));// MII Carrier Sense Synchronizationalways @ (posedge mtx_clk_pad_i or posedge av_reset)begin  if(av_reset)    begin      CarrierSense_Tx1 <= #Tp 1'b0;      CarrierSense_Tx2 <= #Tp 1'b0;    end  else    begin      CarrierSense_Tx1 <= #Tp mcrs_pad_i;      CarrierSense_Tx2 <= #Tp CarrierSense_Tx1;    endendassign TxCarrierSense = ~r_FullD & CarrierSense_Tx2;// MII Collision Synchronizationalways @ (posedge mtx_clk_pad_i or posedge av_reset)begin  if(av_reset)    begin      Collision_Tx1 <= #Tp 1'b0;      Collision_Tx2 <= #Tp 1'b0;    end  else    begin      Collision_Tx1 <= #Tp mcoll_pad_i;      if(ResetCollision)        Collision_Tx2 <= #Tp 1'b0;      else      if(Collision_Tx1)        Collision_Tx2 <= #Tp 1'b1;    endend// Synchronized Collisionassign Collision = ~r_FullD & Collision_Tx2;// Delayed WillTransmitalways @ (posedge mrx_clk_pad_i)begin  WillTransmit_q <= #Tp WillTransmit;  WillTransmit_q2 <= #Tp WillTransmit_q;end assign Transmitting = ~r_FullD & WillTransmit_q2;// Synchronized Receive Enablealways @ (posedge mrx_clk_pad_i or posedge av_reset)begin  if(av_reset)    RxEnSync <= #Tp 1'b0;  else  if(~mrxdv_pad_i)    RxEnSync <= #Tp r_RxEn;end // Synchronizing WillSendControlFrame to WB_CLK;always @ (posedge av_clk or posedge av_reset)begin  if(av_reset)    WillSendControlFrame_sync1 <= 1'b0;  else    WillSendControlFrame_sync1 <=#Tp WillSendControlFrame;endalways @ (posedge av_clk or posedge av_reset)begin  if(av_reset)    WillSendControlFrame_sync2 <= 1'b0;  else    WillSendControlFrame_sync2 <=#Tp WillSendControlFrame_sync1;endalways @ (posedge av_clk or posedge av_reset)begin  if(av_reset)    WillSendControlFrame_sync3 <= 1'b0;  else    WillSendControlFrame_sync3 <=#Tp WillSendControlFrame_sync2;endalways @ (posedge av_clk or posedge av_reset)begin  if(av_reset)    RstTxPauseRq <= 1'b0;  else    RstTxPauseRq <=#Tp WillSendControlFrame_sync2 & ~WillSendControlFrame_sync3;end// TX Pause request Synchronizationalways @ (posedge mtx_clk_pad_i or posedge av_reset)begin  if(av_reset)    begin      TxPauseRq_sync1 <= #Tp 1'b0;      TxPauseRq_sync2 <= #Tp 1'b0;      TxPauseRq_sync3 <= #Tp 1'b0;    end  else    begin      TxPauseRq_sync1 <= #Tp (r_TxPauseRq & r_TxFlow);      TxPauseRq_sync2 <= #Tp TxPauseRq_sync1;      TxPauseRq_sync3 <= #Tp TxPauseRq_sync2;    endendalways @ (posedge mtx_clk_pad_i or posedge av_reset)begin  if(av_reset)    TPauseRq <= #Tp 1'b0;  else    TPauseRq <= #Tp TxPauseRq_sync2 & (~TxPauseRq_sync3);endwire LatchedMRxErr;reg RxAbort_latch;reg RxAbort_sync1;reg RxAbort_wb;reg RxAbortRst_sync1;reg RxAbortRst;// Synchronizing RxAbort to the WISHBONE clockalways @ (posedge mrx_clk_pad_i or posedge av_reset)begin  if(av_reset)    RxAbort_latch <= #Tp 1'b0;  else if(RxAbort | (ShortFrame & ~r_RecSmall) | LatchedMRxErr & ~InvalidSymbol | (ReceivedPauseFrm & (~r_PassAll)))    RxAbort_latch <= #Tp 1'b1;  else if(RxAbortRst)    RxAbort_latch <= #Tp 1'b0;endalways @ (posedge av_clk or posedge av_reset)begin  if(av_reset)    begin      RxAbort_sync1 <= #Tp 1'b0;      RxAbort_wb    <= #Tp 1'b0;      RxAbort_wb    <= #Tp 1'b0;    end  else    begin      RxAbort_sync1 <= #Tp RxAbort_latch;      RxAbort_wb    <= #Tp RxAbort_sync1;    endendalways @ (posedge mrx_clk_pad_i or posedge av_reset)begin  if(av_reset)    begin      RxAbortRst_sync1 <= #Tp 1'b0;      RxAbortRst       <= #Tp 1'b0;    end  else    begin      RxAbortRst_sync1 <= #Tp RxAbort_wb;      RxAbortRst       <= #Tp RxAbortRst_sync1;    endend// Connecting Wishbone moduleeth_avalon  #(  .DESC_COUNT     (TOTAL_DESCRIPTORS      ),                .RX_FIFO_DEPTH  (RX_FIFO_SIZE_IN_BYTES  ),                .TX_FIFO_DEPTH  (TX_FIFO_SIZE_IN_BYTES  ))  eth_avalon_inst    (    .av_reset                       (av_reset           ),    .av_clk                         (av_clk             ),                        //Avalon Control port      //inputs    .av_cs                          (BDCs               ),    .av_write                       (BDCs & av_write    ),    .av_read                        (BDCs & av_read     ),    .av_address                     (av_address[7:0]    ),    .av_writedata                   (av_writedata       ),       //outputs    .av_readdata                    (BD_av_readdata     ),     .av_waitrequest_n               (BDAck              ),    //Avalon TX memory port      //inputs    .av_tx_waitrequest              (av_tx_waitrequest  ),    .av_tx_readdatavalid            (av_tx_readdatavalid),    .av_tx_readdata                 (av_tx_readdata     ),      //outputs    .av_tx_address                  (av_tx_address      ),    .av_tx_read                     (av_tx_read         ),    //Avalon RX memory port      //inputs    .av_rx_waitrequest              (av_rx_waitrequest  ),      //outputs    .av_rx_address                  (av_rx_address      ),    .av_rx_write                    (av_rx_write        ),    .av_rx_writedata                (av_rx_writedata    ),    .av_rx_byteenable               (av_rx_byteenable   ),    //TX    .MTxClk                         (mtx_clk_pad_i),    .TxStartFrm                     (TxStartFrm),    .TxEndFrm                       (TxEndFrm),     .TxUsedData                     (TxUsedData),    .TxData                         (TxData),    .TxRetry                        (TxRetry),    .TxAbort                        (TxAbort),    .TxUnderRun                     (TxUnderRun),     .TxDone                         (TxDone),     .PerPacketCrcEn                 (PerPacketCrcEn),    .PerPacketPad                   (PerPacketPad),     // Register    .r_TxEn                         (r_TxEn),    .r_RxEn                         (r_RxEn),    .r_TxBDNum                      (r_TxBDNum),     .r_RxFlow                       (r_RxFlow),    .r_PassAll                      (r_PassAll),     //RX    .MRxClk                         (mrx_clk_pad_i),    .RxData                         (RxData),    .RxValid                        (RxValid),     .RxStartFrm                     (RxStartFrm),    .RxEndFrm                       (RxEndFrm),                          .Busy_IRQ                       (Busy_IRQ),    .RxE_IRQ                        (RxE_IRQ),    .RxB_IRQ                        (RxB_IRQ),     .TxE_IRQ                        (TxE_IRQ),    .TxB_IRQ                        (TxB_IRQ),     .RxAbort                        (RxAbort_wb),    .RxStatusWriteLatched_sync2     (RxStatusWriteLatched_sync2),     .InvalidSymbol                  (InvalidSymbol),    .LatchedCrcError                (LatchedCrcError),    .RxLength                       (RxByteCnt),    .RxLateCollision                (RxLateCollision),    .ShortFrame                     (ShortFrame),    .DribbleNibble                  (DribbleNibble),    .ReceivedPacketTooBig           (ReceivedPacketTooBig),    .LoadRxStatus                   (LoadRxStatus),    .RetryCntLatched                (RetryCntLatched),    .RetryLimit                     (RetryLimit),    .LateCollLatched                (LateCollLatched),    .DeferLatched                   (DeferLatched),       .RstDeferLatched                (RstDeferLatched),     .CarrierSenseLost               (CarrierSenseLost),    .ReceivedPacketGood             (ReceivedPacketGood),    .AddressMiss                    (AddressMiss),    .ReceivedPauseFrm               (ReceivedPauseFrm)  `ifdef ETH_BIST    ,    .mbist_si_i                     (mbist_si_i),    .mbist_so_o                     (mbist_so_o),    .mbist_ctrl_i                   (mbist_ctrl_i)`endif);// Connecting MacStatus moduleeth_macstatus macstatus1 (  .MRxClk(mrx_clk_pad_i),             .Reset(av_reset),  .ReceiveEnd(ReceiveEnd),            .ReceivedPacketGood(ReceivedPacketGood),     .ReceivedLengthOK(ReceivedLengthOK),   .RxCrcError(RxCrcError),            .MRxErr(MRxErr_Lb),                          .MRxDV(MRxDV_Lb),   .RxStateSFD(RxStateSFD),            .RxStateData(RxStateData),                   .RxStatePreamble(RxStatePreamble),   .RxStateIdle(RxStateIdle),          .Transmitting(Transmitting),                 .RxByteCnt(RxByteCnt),   .RxByteCntEq0(RxByteCntEq0),        .RxByteCntGreat2(RxByteCntGreat2),           .RxByteCntMaxFrame(RxByteCntMaxFrame),   .InvalidSymbol(InvalidSymbol),  .MRxD(MRxD_Lb),                     .LatchedCrcError(LatchedCrcError),           .Collision(mcoll_pad_i),  .CollValid(r_CollValid),            .RxLateCollision(RxLateCollision),           .r_RecSmall(r_RecSmall),  .r_MinFL(r_MinFL),                  .r_MaxFL(r_MaxFL),                           .ShortFrame(ShortFrame),  .DribbleNibble(DribbleNibble),      .ReceivedPacketTooBig(ReceivedPacketTooBig), .r_HugEn(r_HugEn),  .LoadRxStatus(LoadRxStatus),        .RetryCnt(RetryCnt),                         .StartTxDone(StartTxDone),  .StartTxAbort(StartTxAbort),        .RetryCntLatched(RetryCntLatched),           .MTxClk(mtx_clk_pad_i),  .MaxCollisionOccured(MaxCollisionOccured), .RetryLimit(RetryLimit),              .LateCollision(LateCollision),  .LateCollLatched(LateCollLatched),  .DeferIndication(DeferIndication),           .DeferLatched(DeferLatched),  .RstDeferLatched(RstDeferLatched),   .TxStartFrm(TxStartFrmOut),         .StatePreamble(StatePreamble),               .StateData(StateData),  .CarrierSense(CarrierSense_Tx2),    .CarrierSenseLost(CarrierSenseLost),         .TxUsedData(TxUsedDataIn),  .LatchedMRxErr(LatchedMRxErr),      .Loopback(r_LoopBck),                        .r_FullD(r_FullD));endmodule