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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

 Network interface for the VC router.

 History:

 20/08/2008  Initial version. <wsong83@gmail.com>

 30/09/2010  Use template style packet definition. <wsong83@gmail.com>

 05/06/2011  Clean up for opensource. <wsong83@gmail.com>

*/

#ifndef NETWORK_ADAPTER_H_

#define NETWORK_ADAPTER_H_

#include "define.h"

#include <systemc.h>

SC_MODULE(Network_Adapter)

{

public:

    SC_HAS_PROCESS(Network_Adapter);

    Network_Adapter(

             sc_module_name     name // module name

            ,unsigned int       x    // location x

            ,unsigned int       y    // location y

        );

    ~Network_Adapter();

    // interface with processor

    sc_port<sc_fifo_in_if<FRAME> >      frame_in; // frame for transmission

    sc_port<sc_fifo_out_if<FRAME> >     frame_out; // frame for receiving

    // interface with router

    sc_port<sc_fifo_in_if<FLIT> > IP;  // input port from IO driver

    sc_port<sc_fifo_out_if<FLIT> > OP; // output port to IO driver

    sc_in<bool> CP [SubChN];           // the credit input from the router input buffer

    sc_out<bool> CPa [SubChN];         // ack to the credit

private:

    unsigned int loc_x,loc_y; // location information

    sc_fifo<FLIT>                       oflit; // the current flit under transmission

    sc_fifo<FLIT>                       iflit [SubChN]; // the current flits under receiving from all input VCs

    unsigned int                        token [SubChN]; // the token ready for each output VC

    sc_event                            token_arrive [SubChN]; // the token ready event

    // functional thread

    void ibuffer_thread(unsigned int);                // input buffer respond thread

    void obuffer_thread(unsigned int);                // output buffer respond thread

    void oport();                                     // the thread transmitting flit

    void iport();                                     // the thread receiving flits

    void credit_update(unsigned int);                 // receive credits and update the available tokens

    // other functions

    bool check_frame(const FRAME& frame);           // check the correctness of frame received

};

#endif