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/*

 Asynchronous SDM NoC

 (C)2011 Wei Song

 Advanced Processor Technologies Group

 Computer Science, the Univ. of Manchester, UK

 Authors:

 Wei Song     wsong83@gmail.com

 License: LGPL 3.0 or later

 The port driver between NI and router.

 History:

 27/04/2010  Initial version. <wsong83@gmail.com>

 03/06/2011  Remove the sc_unit datatype to support data width larger than 64. <wsong83@gmail.com>

*/

#ifndef RT_DRIVER_H_

#define RT_DRIVER_H_

#include "define.h"

#include <systemc.h>

#include "pdu_def.h"

SC_MODULE(RTDriver) {

 public:

  // port with network interface

  sc_port<sc_fifo_in_if<FLIT> > NI2P;

  sc_port<sc_fifo_out_if<FLIT> > P2NI;

  sc_out<bool> CP [SubChN];

  sc_in<bool > CPa [SubChN];

  // signals from interface to router

  sc_out<sc_lv<ChBW*4> > rtid [4];

  sc_out<sc_lv<3> > rtift;

  sc_out<sc_lv<SubChN> > rtivc;

  sc_in<sc_logic> rtia;

  sc_in<sc_lv<SubChN> > rtic;

  sc_out<sc_lv<SubChN> > rtica;

  sc_in<sc_lv<ChBW*4> > rtod [4];

  sc_in<sc_lv<3> > rtoft;

  sc_in<sc_lv<SubChN> > rtovc;

  sc_out<sc_logic> rtoa;

  sc_out<sc_lv<SubChN> > rtoc;

  sc_in<sc_lv<SubChN> > rtoca;

  // local variable

  sc_signal<bool> out_cred[SubChN];     /* the input credit */

  sc_signal<bool> out_cred_ack[SubChN]; /* the input credit ack */

  SC_HAS_PROCESS(RTDriver);

  RTDriver(sc_module_name name);

  void IPdetect();              // Method to detect the router input port

  void OPdetect();              // Method to detect the router output port

  void Creditdetect();          // Method to detect the credit ports

  void send();                  // thread of sending a flit

  void recv();                  // thread to recveive a flit

  sc_signal<bool> rtinp_sig; // fire when the router input port is ready for a new flit

  sc_signal<bool> rtoutp_sig; // fire when the router output port has a new flit

  unsigned int c1o42b(unsigned int); // convert 1-of-4 to binary

};

#endif