cache_fetch.h

改进的基于6个mips核的NOC网络

/*
 *  TU Eindhoven
 *  Eindhoven, The Netherlands
 *
 *  Name            :   cache_fetch.h
 *
 *  Author          :   [e-mail]
 *
 *  Date            :   
 *
 *  Function        :   Cache fetch/store unit
 *
 *
 */

#ifndef CACHE_FETCH_H_INCLUDED
#define CACHE_FETCH_H_INCLUDED

#include <systemc.h>

SC_MODULE(CACHE_FETCH)
{
  sc_in<bool> clk;
  
  sc_in< sc_bv<32> > din;
  sc_in< sc_bv<32> > addr;
  sc_in< bool > fetch, storew, storeb;
  
  sc_out< sc_bv<32> > dout;
  sc_out< bool > busy;
  
  sc_out< sc_bv<32> > mem_addr, mem_din;
  sc_in< sc_bv<32> > mem_dout;
  sc_out< bool > mem_ww, mem_wb, mem_r;
  sc_in< bool > mem_rdy;
  
  enum state { IDLE, WAIT_MEM, NEXT_WORD, LAST_WORD };
  sc_signal< unsigned > current_state, next_state;
  sc_signal< sc_bv<2> > storing, n_storing;
  sc_signal< sc_uint<2> > word;

  sc_signal< bool > word_inc, word_clr;

  // own data, addr needed, because memory writing can be performed 
  // while cache is read
  sc_signal< sc_bv<32> > din_reg, addr_reg;

  sc_out< sc_uint<2> > word_out;
  sc_out< bool > word_rdy;
  
  void update_state();
  void logic();
  void word_latch();
  void store_latch();
  
  SC_CTOR(CACHE_FETCH){
	SC_METHOD(update_state);
	sensitive_pos << clk;
	
	SC_METHOD(logic);
	sensitive << current_state << storing << word 
			  << din << din_reg << addr << addr_reg 
			  << fetch << storew << storeb 
			  << mem_dout << mem_rdy;
	
	SC_METHOD(word_latch);
	sensitive_pos << clk;
	
	SC_METHOD(store_latch);
	sensitive_pos << clk;
  }
};

#endif