module openmips(

		input wire 	      clk,
		input wire 	      rst,


		input wire [`RegBus]  rom_data_i,
		output wire [`RegBus] rom_addr_o,
		output wire 	      rom_ce_o,

		//Á¬½ÓÊý¾Ý´æ´¢Æ÷data_ram
		input wire [`RegBus]  ram_data_i,
		output wire [`RegBus] ram_addr_o,
		output wire [`RegBus] ram_data_o,
		output wire 	      ram_we_o,
		output wire [3:0]     ram_sel_o,
		output wire [3:0]     ram_ce_o

		);

   wire [`InstAddrBus] 		      pc;
   wire [`InstAddrBus] 		      id_pc_i;
   wire [`InstBus] 		      id_inst_i;
   
   //Á¬½ÓÒëÂë½×¶ÎIDÄ£¿éµÄÊä³öÓëID/EXÄ£¿éµÄÊäÈë
   wire [`AluOpBus] 		      id_aluop_o;
   wire [`AluSelBus] 		      id_alusel_o;
   wire [`RegBus] 		      id_reg1_o;
   wire [`RegBus] 		      id_reg2_o;
   wire 			      id_wreg_o;
   wire [`RegAddrBus] 		      id_wd_o;
   wire 			      id_is_in_delayslot_o;
   wire [`RegBus] 		      id_link_address_o;	
   wire [`RegBus] 		      id_inst_o;
   
   //Á¬½ÓID/EXÄ£¿éµÄÊä³öÓëÖ´ÐÐ½×¶ÎEXÄ£¿éµÄÊäÈë
   wire [`AluOpBus] 		      ex_aluop_i;
   wire [`AluSelBus] 		      ex_alusel_i;
   wire [`RegBus] 		      ex_reg1_i;
   wire [`RegBus] 		      ex_reg2_i;
   wire 			      ex_wreg_i;
   wire [`RegAddrBus] 		      ex_wd_i;
   wire 			      ex_is_in_delayslot_i;	
   wire [`RegBus] 		      ex_link_address_i;	
   wire [`RegBus] 		      ex_inst_i;
   
   //Á¬½ÓÖ´ÐÐ½×¶ÎEXÄ£¿éµÄÊä³öÓëEX/MEMÄ£¿éµÄÊäÈë
   wire 			      ex_wreg_o;
   wire [`RegAddrBus] 		      ex_wd_o;
   wire [`RegBus] 		      ex_wdata_o;
   wire [`RegBus] 		      ex_hi_o;
   wire [`RegBus] 		      ex_lo_o;
   wire 			      ex_whilo_o;
   wire [`AluOpBus] 		      ex_aluop_o;
   wire [`RegBus] 		      ex_mem_addr_o;
   wire [`RegBus] 		      ex_reg1_o;
   wire [`RegBus] 		      ex_reg2_o;	

   //Á¬½ÓEX/MEMÄ£¿éµÄÊä³öÓë·Ã´æ½×¶ÎMEMÄ£¿éµÄÊäÈë
   wire 			      mem_wreg_i;
   wire [`RegAddrBus] 		      mem_wd_i;
   wire [`RegBus] 		      mem_wdata_i;
   wire [`RegBus] 		      mem_hi_i;
   wire [`RegBus] 		      mem_lo_i;
   wire 			      mem_whilo_i;		
   wire [`AluOpBus] 		      mem_aluop_i;
   wire [`RegBus] 		      mem_mem_addr_i;
   wire [`RegBus] 		      mem_reg1_i;
   wire [`RegBus] 		      mem_reg2_i;		

   //Á¬½Ó·Ã´æ½×¶ÎMEMÄ£¿éµÄÊä³öÓëMEM/WBÄ£¿éµÄÊäÈë
   wire 			      mem_wreg_o;
   wire [`RegAddrBus] 		      mem_wd_o;
   wire [`RegBus] 		      mem_wdata_o;
   wire [`RegBus] 		      mem_hi_o;
   wire [`RegBus] 		      mem_lo_o;
   wire 			      mem_whilo_o;	
   wire 			      mem_LLbit_value_o;
   wire 			      mem_LLbit_we_o;		
   
   //Á¬½ÓMEM/WBÄ£¿éµÄÊä³öÓë»ØÐ´½×¶ÎµÄÊäÈë	
   wire 			      wb_wreg_i;
   wire [`RegAddrBus] 		      wb_wd_i;
   wire [`RegBus] 		      wb_wdata_i;
   wire [`RegBus] 		      wb_hi_i;
   wire [`RegBus] 		      wb_lo_i;
   wire 			      wb_whilo_i;	
   wire 			      wb_LLbit_value_i;
   wire 			      wb_LLbit_we_i;	
   
   //Á¬½ÓÒëÂë½×¶ÎIDÄ£¿éÓëÍ¨ÓÃ¼Ä´æÆ÷RegfileÄ£¿é
   wire 			      reg1_read;
   wire 			      reg2_read;
   wire [`RegBus] 		      reg1_data;
   wire [`RegBus] 		      reg2_data;
   wire [`RegAddrBus] 		      reg1_addr;
   wire [`RegAddrBus] 		      reg2_addr;

   //Á¬½ÓÖ´ÐÐ½×¶ÎÓëhiloÄ£¿éµÄÊä³ö£¬¶ÁÈ¡HI¡¢LO¼Ä´æÆ÷
   wire [`RegBus] 		      hi;
   wire [`RegBus] 		      lo;

   //Á¬½ÓÖ´ÐÐ½×¶ÎÓëex_regÄ£¿é£¬ÓÃÓÚ¶àÖÜÆÚµÄMADD¡¢MADDU¡¢MSUB¡¢MSUBUÖ¸Áî
   wire [`DoubleRegBus] 	      hilo_temp_o;
   wire [1:0] 			      cnt_o;
   
   wire [`DoubleRegBus] 	      hilo_temp_i;
   wire [1:0] 			      cnt_i;

   wire [`DoubleRegBus] 	      div_result;
   wire 			      div_ready;
   wire [`RegBus] 		      div_opdata1;
   wire [`RegBus] 		      div_opdata2;
   wire 			      div_start;
   wire 			      div_annul;
   wire 			      signed_div;

   wire 			      is_in_delayslot_i;
   wire 			      is_in_delayslot_o;
   wire 			      next_inst_in_delayslot_o;
   wire 			      id_branch_flag_o;
   wire [`RegBus] 		      branch_target_address;

   wire [5:0] 			      stall;
   wire 			      stallreq_from_id;	
   wire 			      stallreq_from_ex;

   wire 			      LLbit_o;
   
   //pc_regÀý»¯
   pc_reg pc_reg0(
		  .clk(clk),
		  .rst(rst),
		  .stall(stall),
		  .branch_flag_i(id_branch_flag_o),
		  .branch_target_address_i(branch_target_address),		
		  .pc(pc),
		  .ce(rom_ce_o)	
      
		  );
   
   assign rom_addr_o = pc;

   //IF/IDÄ£¿éÀý»¯
   if_id if_id0(
		.clk(clk),
		.rst(rst),
		.stall(stall),
		.if_pc(pc),
		.if_inst(rom_data_i),
		.id_pc(id_pc_i),
		.id_inst(id_inst_i)      	
		);
   
   //ÒëÂë½×¶ÎIDÄ£¿é
   id id0(
	  .rst(rst),
	  .pc_i(id_pc_i),
	  .inst_i(id_inst_i),

  	  .ex_aluop_i(ex_aluop_o),

	  .reg1_data_i(reg1_data),
	  .reg2_data_i(reg2_data),

	  //´¦ÓÚÖ´ÐÐ½×¶ÎµÄÖ¸ÁîÒªÐ´ÈëµÄÄ¿µÄ¼Ä´æÆ÷ÐÅÏ¢
	  .ex_wreg_i(ex_wreg_o),
	  .ex_wdata_i(ex_wdata_o),
	  .ex_wd_i(ex_wd_o),

	  //´¦ÓÚ·Ã´æ½×¶ÎµÄÖ¸ÁîÒªÐ´ÈëµÄÄ¿µÄ¼Ä´æÆ÷ÐÅÏ¢
	  .mem_wreg_i(mem_wreg_o),
	  .mem_wdata_i(mem_wdata_o),
	  .mem_wd_i(mem_wd_o),

	  .is_in_delayslot_i(is_in_delayslot_i),

	  //ËÍµ½regfileµÄÐÅÏ¢
	  .reg1_read_o(reg1_read),
	  .reg2_read_o(reg2_read), 	  

	  .reg1_addr_o(reg1_addr),
	  .reg2_addr_o(reg2_addr), 
      
	  //ËÍµ½ID/EXÄ£¿éµÄÐÅÏ¢
	  .aluop_o(id_aluop_o),
	  .alusel_o(id_alusel_o),
	  .reg1_o(id_reg1_o),
	  .reg2_o(id_reg2_o),
	  .wd_o(id_wd_o),
	  .wreg_o(id_wreg_o),
	  .inst_o(id_inst_o),

	  .next_inst_in_delayslot_o(next_inst_in_delayslot_o),	
	  .branch_flag_o(id_branch_flag_o),
	  .branch_target_address_o(branch_target_address),       
	  .link_addr_o(id_link_address_o),
      
	  .is_in_delayslot_o(id_is_in_delayslot_o),
      
	  .stallreq(stallreq_from_id)		
	  );

   //Í¨ÓÃ¼Ä´æÆ÷RegfileÀý»¯
   regfile regfile1(
		    .clk (clk),
		    .rst (rst),
		    .we	(wb_wreg_i),
		    .waddr (wb_wd_i),
		    .wdata (wb_wdata_i),
		    .re1 (reg1_read),
		    .raddr1 (reg1_addr),
		    .rdata1 (reg1_data),
		    .re2 (reg2_read),
		    .raddr2 (reg2_addr),
		    .rdata2 (reg2_data)
		    );

   //ID/EXÄ£¿é
   id_ex id_ex0(
		.clk(clk),
		.rst(rst),
      
		.stall(stall),
      
		//´ÓÒëÂë½×¶ÎIDÄ£¿é´«µÝµÄÐÅÏ¢
		.id_aluop(id_aluop_o),
		.id_alusel(id_alusel_o),
		.id_reg1(id_reg1_o),
		.id_reg2(id_reg2_o),
		.id_wd(id_wd_o),
		.id_wreg(id_wreg_o),
		.id_link_address(id_link_address_o),
		.id_is_in_delayslot(id_is_in_delayslot_o),
		.next_inst_in_delayslot_i(next_inst_in_delayslot_o),		
		.id_inst(id_inst_o),		
      
		//´«µÝµ½Ö´ÐÐ½×¶ÎEXÄ£¿éµÄÐÅÏ¢
		.ex_aluop(ex_aluop_i),
		.ex_alusel(ex_alusel_i),
		.ex_reg1(ex_reg1_i),
		.ex_reg2(ex_reg2_i),
		.ex_wd(ex_wd_i),
		.ex_wreg(ex_wreg_i),
		.ex_link_address(ex_link_address_i),
  		.ex_is_in_delayslot(ex_is_in_delayslot_i),
		.is_in_delayslot_o(is_in_delayslot_i),
		.ex_inst(ex_inst_i)		
		);		
   
   //EXÄ£¿é
   ex ex0(
	  .rst(rst),
      
	  //ËÍµ½Ö´ÐÐ½×¶ÎEXÄ£¿éµÄÐÅÏ¢
	  .aluop_i(ex_aluop_i),
	  .alusel_i(ex_alusel_i),
	  .reg1_i(ex_reg1_i),
	  .reg2_i(ex_reg2_i),
	  .wd_i(ex_wd_i),
	  .wreg_i(ex_wreg_i),
	  .hi_i(hi),
	  .lo_i(lo),
	  .inst_i(ex_inst_i),

	  .wb_hi_i(wb_hi_i),
	  .wb_lo_i(wb_lo_i),
	  .wb_whilo_i(wb_whilo_i),
	  .mem_hi_i(mem_hi_o),
	  .mem_lo_i(mem_lo_o),
	  .mem_whilo_i(mem_whilo_o),

	  .hilo_temp_i(hilo_temp_i),
	  .cnt_i(cnt_i),

	  .div_result_i(div_result),
	  .div_ready_i(div_ready), 

	  .link_address_i(ex_link_address_i),
	  .is_in_delayslot_i(ex_is_in_delayslot_i),	  
      
	  //EXÄ£¿éµÄÊä³öµ½EX/MEMÄ£¿éÐÅÏ¢
	  .wd_o(ex_wd_o),
	  .wreg_o(ex_wreg_o),
	  .wdata_o(ex_wdata_o),

	  .hi_o(ex_hi_o),
	  .lo_o(ex_lo_o),
	  .whilo_o(ex_whilo_o),

	  .hilo_temp_o(hilo_temp_o),
	  .cnt_o(cnt_o),

	  .div_opdata1_o(div_opdata1),
	  .div_opdata2_o(div_opdata2),
	  .div_start_o(div_start),
	  .signed_div_o(signed_div),	

	  .aluop_o(ex_aluop_o),
	  .mem_addr_o(ex_mem_addr_o),
	  .reg2_o(ex_reg2_o),
      
	  .stallreq(stallreq_from_ex)     				
      
	  );

   //EX/MEMÄ£¿é
   ex_mem ex_mem0(
		  .clk(clk),
		  .rst(rst),
      
		  .stall(stall),
      
		  //À´×ÔÖ´ÐÐ½×¶ÎEXÄ£¿éµÄÐÅÏ¢	
		  .ex_wd(ex_wd_o),
		  .ex_wreg(ex_wreg_o),
		  .ex_wdata(ex_wdata_o),
		  .ex_hi(ex_hi_o),
		  .ex_lo(ex_lo_o),
		  .ex_whilo(ex_whilo_o),		

  		  .ex_aluop(ex_aluop_o),
		  .ex_mem_addr(ex_mem_addr_o),
		  .ex_reg2(ex_reg2_o),			

		  .hilo_i(hilo_temp_o),
		  .cnt_i(cnt_o),	

		  //ËÍµ½·Ã´æ½×¶ÎMEMÄ£¿éµÄÐÅÏ¢
		  .mem_wd(mem_wd_i),
		  .mem_wreg(mem_wreg_i),
		  .mem_wdata(mem_wdata_i),
		  .mem_hi(mem_hi_i),
		  .mem_lo(mem_lo_i),
		  .mem_whilo(mem_whilo_i),

  		  .mem_aluop(mem_aluop_i),
		  .mem_mem_addr(mem_mem_addr_i),
		  .mem_reg2(mem_reg2_i),
      
		  .hilo_o(hilo_temp_i),
		  .cnt_o(cnt_i)
      
		  );
   
   //MEMÄ£¿éÀý»¯
   mem mem0(
	    .rst(rst),
      
	    //À´×ÔEX/MEMÄ£¿éµÄÐÅÏ¢	
	    .wd_i(mem_wd_i),
	    .wreg_i(mem_wreg_i),
	    .wdata_i(mem_wdata_i),
	    .hi_i(mem_hi_i),
	    .lo_i(mem_lo_i),
	    .whilo_i(mem_whilo_i),		

  	    .aluop_i(mem_aluop_i),
	    .mem_addr_i(mem_mem_addr_i),
	    .reg2_i(mem_reg2_i),
      
	    //À´×ÔmemoryµÄÐÅÏ¢
	    .mem_data_i(ram_data_i),

	    //LLbit_iÊÇLLbit¼Ä´æÆ÷µÄÖµ
	    .LLbit_i(LLbit_o),
	    //µ«²»Ò»¶¨ÊÇ×îÐÂÖµ£¬»ØÐ´½×¶Î¿ÉÄÜÒªÐ´LLbit£¬ËùÒÔ»¹Òª½øÒ»²½ÅÐ¶Ï
	    .wb_LLbit_we_i(wb_LLbit_we_i),
	    .wb_LLbit_value_i(wb_LLbit_value_i),

	    .LLbit_we_o(mem_LLbit_we_o),
	    .LLbit_value_o(mem_LLbit_value_o),
      
	    //ËÍµ½MEM/WBÄ£¿éµÄÐÅÏ¢
	    .wd_o(mem_wd_o),
	    .wreg_o(mem_wreg_o),
	    .wdata_o(mem_wdata_o),
	    .hi_o(mem_hi_o),
	    .lo_o(mem_lo_o),
	    .whilo_o(mem_whilo_o),
      
	    //ËÍµ½memoryµÄÐÅÏ¢
	    .mem_addr_o(ram_addr_o),
	    .mem_we_o(ram_we_o),
	    .mem_sel_o(ram_sel_o),
	    .mem_data_o(ram_data_o),
	    .mem_ce_o(ram_ce_o)		
	    );

   //MEM/WBÄ£¿é
   mem_wb mem_wb0(
		  .clk(clk),
		  .rst(rst),

		  .stall(stall),

		  //À´×Ô·Ã´æ½×¶ÎMEMÄ£¿éµÄÐÅÏ¢	
		  .mem_wd(mem_wd_o),
		  .mem_wreg(mem_wreg_o),
		  .mem_wdata(mem_wdata_o),
		  .mem_hi(mem_hi_o),
		  .mem_lo(mem_lo_o),
		  .mem_whilo(mem_whilo_o),		

		  .mem_LLbit_we(mem_LLbit_we_o),
		  .mem_LLbit_value(mem_LLbit_value_o),						
      
		  //ËÍµ½»ØÐ´½×¶ÎµÄÐÅÏ¢
		  .wb_wd(wb_wd_i),
		  .wb_wreg(wb_wreg_i),
		  .wb_wdata(wb_wdata_i),
		  .wb_hi(wb_hi_i),
		  .wb_lo(wb_lo_i),
		  .wb_whilo(wb_whilo_i),

		  .wb_LLbit_we(wb_LLbit_we_i),
		  .wb_LLbit_value(wb_LLbit_value_i)				
      
		  );

   hilo_reg hilo_reg0(
		      .clk(clk),
		      .rst(rst),
      
		      //Ð´¶Ë¿Ú
		      .we(wb_whilo_i),
		      .hi_i(wb_hi_i),
		      .lo_i(wb_lo_i),
      
		      //¶Á¶Ë¿Ú1
		      .hi_o(hi),
		      .lo_o(lo)	
		      );
   
   ctrl ctrl0(
	      .rst(rst),
      
	      .stallreq_from_id(stallreq_from_id),
      
  	      //À´×ÔÖ´ÐÐ½×¶ÎµÄÔÝÍ£ÇëÇó
	      .stallreq_from_ex(stallreq_from_ex),

	      .stall(stall)       	
	      );

   div div0(
	    .clk(clk),
	    .rst(rst),
      
	    .signed_div_i(signed_div),
	    .opdata1_i(div_opdata1),
	    .opdata2_i(div_opdata2),
	    .start_i(div_start),
	    .annul_i(1'b0),
      
	    .result_o(div_result),
	    .ready_o(div_ready)
	    );

   LLbit_reg LLbit_reg0(
			.clk(clk),
			.rst(rst),
			.flush(1'b0),
      
			//Ð´¶Ë¿Ú
			.LLbit_i(wb_LLbit_value_i),
			.we(wb_LLbit_we_i),
      
			//¶Á¶Ë¿Ú1
			.LLbit_o(LLbit_o)
      
			);
   
endmodule