cache_bram.cpp

改进的基于6个mips核的NOC网络

/*
 *  TU Eindhoven
 *  Eindhoven, The Netherlands
 *
 *  Name            :   cache_bram.h
 *
 *  Author          :   [e-mail]
 *
 *  Date            :   
 *
 *  Function        :   Cache storage in Xilinx BlockRAM
 *  
 *
 */

#include "cache_bram.h"

void CACHE_BRAM_WRAP::reg()
{
  if( en.read() ){
    word = offset.read();
  }
}

void CACHE_BRAM_WRAP::in()
{
  bool clk_v = clk.read();
  bool en_v = en.read();
  bool we_v = we.read();
  sc_uint<2> off = offset.read();
  sc_int<32> din_v = din.read();
  sc_bv<9> addr0, addr1;
  sc_bv<TAG_BITS> tag_in_v = tagi.read();
  sc_bv<4> tag3, tag2, tag1, tag0;
  
  sc_bv<8> ix = index.read();
  sc_bv<1> zero(0), one(1);
  addr0 = (ix, zero);
  addr1 = (ix, one);
  
  ADDRA0.write( sc_uint<9>(addr0) );
  ADDRB0.write( sc_uint<9>(addr1) );
  ADDRA1.write( sc_uint<9>(addr0) );
  ADDRB1.write( sc_uint<9>(addr1) );
  
  DIA0.write(din_v); DIB0.write(din_v); DIA1.write(din_v); DIB1.write(din_v);

  WEA0.write(false); WEB0.write(false); WEA1.write(false); WEB1.write(false);
  switch(off){
  case 1 : WEB0.write(we_v); break;
  case 2 : WEA1.write(we_v); break;
  case 3 : WEB1.write(we_v); break;
  default : WEA0.write(we_v); break;
  }
  
  tag3[3] = valid_in.read();
  tag3.range(2,0) = tag_in_v.range(14,12);
  tag2 = tag_in_v.range(11,8);
  tag1 = tag_in_v.range(7,4);
  tag0 = tag_in_v.range(3,0);
  
  DIPB1.write( tag3 );
  DIPA1.write( tag2 );
  DIPB0.write( tag1 );
  DIPA0.write( tag0 );
  
  ENA0.write(en_v); ENB0.write(en_v); ENA1.write(en_v); ENB1.write(en_v);  
  CLKA0.write(clk_v); CLKB0.write(clk_v); CLKA1.write(clk_v); CLKB1.write(clk_v);
  SSRA0.write(false); SSRB0.write(false); SSRA1.write(false); SSRB1.write(false);    
  
}

void CACHE_BRAM_WRAP::out()
{
  sc_bv<32> data;
  bool vld;
  sc_bv<TAG_BITS> tag;
  sc_bv<3> t3;
  sc_bv<TAG_BITS-15> zerofill(0);
  sc_bv<4> t2, t1, t0;
  
  switch(word.read()){
  case 1 : data = DOB0.read(); break;
  case 2 : data = DOA1.read(); break;
  case 3 : data = DOB1.read(); break;
  default : data = DOA0.read(); break;
  }
  
  vld = (DOPB1.read()[3]!=0);
  t3 = DOPB1.read().range(2,0);
  t2 = DOPA1.read();
  t1 = DOPB0.read();
  t0 = DOPA0.read();
  
  tag = (zerofill, t3, t2, t1, t0);
  
  dout.write(data);
  valid.write(vld);
  tago.write(tag);
}