www.pudn.com > noc.rar > brom8k.cpp

/*
 *  TU Eindhoven
 *  Eindhoven, The Netherlands
 *
 *  Name            :   brom8k.cpp
 *
 *  Author          :   A.S.Slusarczyk@tue.nl
 *
 *  Date            :   
 *
 *  Function        :   ROM based on VirtexII 16kb BlockRAMs
 *
 *
 */
 
#include "brom8k.h"

void BROM8KCONV::in()
{  

  sc_bv a = addr.read();
  
  sc_bv<11> a_12_2 = a.range(12,2);
  sc_uint<11> addr11 = a_12_2;
  
  ADDR1.write(addr11); ADDR0.write(addr11); ADDR2.write(addr11); ADDR3.write(addr11); 
    
  DI0.write(0); 
  DI1.write(0); 
  DI2.write(0); 
  DI3.write(0); 
  DIP0.write(0); DIP1.write(0); DIP2.write(0); DIP3.write(0); 
  
  bool e = (en.read()[0]!=0);
  EN0.write(e);  EN1.write(e); EN2.write(e);  EN3.write(e);
  WE0.write(0);  
  WE1.write(0); 
  WE2.write(0);  
  WE3.write(0);
  SSR0.write(0); SSR1.write(0); SSR2.write(0); SSR3.write(0);
  CLK0.write(clk.read()); CLK1.write(clk.read()); CLK2.write(clk.read()); CLK3.write(clk.read()); 
}

void BROM8KCONV::out()
{
  sc_bv<32> data32;
  sc_bv<8> d0, d1, d2, d3;
 

  // gather bytes of the word from memory blocks
  d0 = DO0.read();
  d1 = DO1.read();
  d2 = DO2.read();
  d3 = DO3.read();
  
  // 3 LS bytes go straight to the output, regardless of mode
#ifdef MIPS_BIG_ENDIAN
  data32 = (d0, d1, d2, d3);
#else
  data32 = (d3, d2, d1, d0);
#endif
  
  dout.write( data32 );
  memwait.write( false );
}

////////////////////////////////////////////////////////////////////////////////////////////////////

void DBGBROM8KCONV::in()
{  

  bool clk = CLK.read();
  
  CLK0.write(clk); CLK1.write(clk); CLK2.write(clk); CLK3.write(clk);
  
  // discard two least significant bits of the address
  sc_uint<11> addr = ADDR.read().range(12,2);  
  ADDR1.write(addr); ADDR0.write(addr); ADDR2.write(addr); ADDR3.write(addr); 
  
  // split the input data between the memory blocks
  sc_int<32> dwr = DI.read();
#ifdef MIPS_BIG_ENDIAN
  sc_int<8> dwr0 = dwr.range(31,24), dwr1 = dwr.range(23,16), dwr2 = dwr.range(15,8), dwr3 = dwr.range(7,0);
#else
  sc_int<8> dwr3 = dwr.range(31,24), dwr2 = dwr.range(23,16), dwr1 = dwr.range(15,8), dwr0 = dwr.range(7,0);
#endif
  DI0.write(dwr0); DI1.write(dwr1); DI2.write(dwr2); DI3.write(dwr3); 

  bool en = EN.read(), we = WE.read();
  EN0.write(en); EN1.write(en); EN2.write(en); EN3.write(en);
  WE0.write(we); WE1.write(we); WE2.write(we); WE3.write(we);
  SSR0.write(0); SSR1.write(0); SSR2.write(0); SSR3.write(0);
  DIP0.write(1); DIP1.write(1); DIP2.write(1); DIP3.write(1); 
}

void DBGBROM8KCONV::out()
{
  sc_int<32> data;
  sc_int<8> d0, d1, d2, d3;
  
  // gather bytes of the word from memory blocks
  d0 = DO0.read();
  d1 = DO1.read();
  d2 = DO2.read();
  d3 = DO3.read();

#ifdef MIPS_BIG_ENDIAN
  data = (d0, d1, d2, d3);
#else
  data = (d3, d2, d1, d0);
#endif
  
  DO.write( data );
}

#ifndef VERILOG

void ROM8K::mem_init(const char *filename, int size){
  vector* > v;
  v.push_back(bram0->memory);
  v.push_back(bram1->memory);
  v.push_back(bram2->memory);
  v.push_back(bram3->memory);
  init_memory(&v,size,filename);
}
void ROM8K::mem_dump(const char *filename, int size){
  vector* > v;
  v.push_back(bram0->memory);
  v.push_back(bram1->memory);
  v.push_back(bram2->memory);
  v.push_back(bram3->memory);
  dump_memory(&v,size,filename);
}

#endif