《UVM 实战》运行第一个验证平台 STEP6

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`ifndef MY_SEQUENCER__SV
`define MY_SEQUENCER__SV

class my_sequencer extends uvm_sequencer #(my_transaction);
   
   function new(string name, uvm_component parent);
      super.new(name, parent);
   endfunction 
   
   `uvm_component_utils(my_sequencer)
endclass

`endif复制

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`ifndef MY_DRIVER__SV
`define MY_DRIVER__SV
class my_driver extends uvm_driver#(my_transaction);

   virtual my_if vif;

   `uvm_component_utils(my_driver)
   function new(string name = "my_driver", uvm_component parent = null);
      super.new(name, parent);
   endfunction

   virtual function void build_phase(uvm_phase phase);
      super.build_phase(phase);
      if(!uvm_config_db#(virtual my_if)::get(this, "", "vif", vif))
         `uvm_fatal("my_driver", "virtual interface must be set for vif!!!")
   endfunction

   extern task main_phase(uvm_phase phase);
   extern task drive_one_pkt(my_transaction tr);
endclass

task my_driver::main_phase(uvm_phase phase);
   vif.data <= 8'b0;
   vif.valid <= 1'b0;
   while(!vif.rst_n)
      @(posedge vif.clk);
   while(1) begin
      seq_item_port.get_next_item(req);
      drive_one_pkt(req);
      seq_item_port.item_done();
   end
endtask

task my_driver::drive_one_pkt(my_transaction tr);
   byte unsigned     data_q[];
   int  data_size;
   
   data_size = tr.pack_bytes(data_q) / 8; 
   `uvm_info("my_driver", "begin to drive one pkt", UVM_LOW);
   repeat(3) @(posedge vif.clk);
   for ( int i = 0; i < data_size; i++ ) begin
      @(posedge vif.clk);
      vif.valid <= 1'b1;
      vif.data <= data_q[i]; 
   end

   @(posedge vif.clk);
   vif.valid <= 1'b0;
   `uvm_info("my_driver", "end drive one pkt", UVM_LOW);
endtask


`endif复制

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`ifndef MY_AGENT__SV
`define MY_AGENT__SV

class my_agent extends uvm_agent ;
   my_sequencer  sqr;   // 声明 sequencer
   my_driver     drv;
   my_monitor    mon;
   
   uvm_analysis_port #(my_transaction)  ap;
   
   function new(string name, uvm_component parent);
      super.new(name, parent);
   endfunction 
   
   extern virtual function void build_phase(uvm_phase phase);
   extern virtual function void connect_phase(uvm_phase phase);

   `uvm_component_utils(my_agent)
endclass 


function void my_agent::build_phase(uvm_phase phase);
   super.build_phase(phase);
   if (is_active == UVM_ACTIVE) begin
      sqr = my_sequencer::type_id::create("sqr", this);
      drv = my_driver::type_id::create("drv", this);
   end
   mon = my_monitor::type_id::create("mon", this);
endfunction 

function void my_agent::connect_phase(uvm_phase phase);  //新增该函数，将两个port连接起来
   super.connect_phase(phase);
   if (is_active == UVM_ACTIVE) begin
      drv.seq_item_port.connect(sqr.seq_item_export);
   end
   ap = mon.ap;
endfunction

`endif复制

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`ifndef MY_ENV__SV
`define MY_ENV__SV

class my_env extends uvm_env;

   my_agent   i_agt;
   my_agent   o_agt;
   my_model   mdl;
   my_scoreboard scb;
   
   uvm_tlm_analysis_fifo #(my_transaction) agt_scb_fifo;
   uvm_tlm_analysis_fifo #(my_transaction) agt_mdl_fifo;
   uvm_tlm_analysis_fifo #(my_transaction) mdl_scb_fifo;
   
   function new(string name = "my_env", uvm_component parent);
      super.new(name, parent);
   endfunction

   virtual function void build_phase(uvm_phase phase);
      super.build_phase(phase);
      i_agt = my_agent::type_id::create("i_agt", this);
      o_agt = my_agent::type_id::create("o_agt", this);
      i_agt.is_active = UVM_ACTIVE;
      o_agt.is_active = UVM_PASSIVE;
      mdl = my_model::type_id::create("mdl", this);
      scb = my_scoreboard::type_id::create("scb", this);
      agt_scb_fifo = new("agt_scb_fifo", this);
      agt_mdl_fifo = new("agt_mdl_fifo", this);
      mdl_scb_fifo = new("mdl_scb_fifo", this);
   endfunction

   extern virtual function void connect_phase(uvm_phase phase);
   extern virtual task main_phase(uvm_phase phase);
   
   `uvm_component_utils(my_env)
endclass

function void my_env::connect_phase(uvm_phase phase);
   super.connect_phase(phase);
   i_agt.ap.connect(agt_mdl_fifo.analysis_export);
   mdl.port.connect(agt_mdl_fifo.blocking_get_export);
   mdl.ap.connect(mdl_scb_fifo.analysis_export);
   scb.exp_port.connect(mdl_scb_fifo.blocking_get_export);
   o_agt.ap.connect(agt_scb_fifo.analysis_export);
   scb.act_port.connect(agt_scb_fifo.blocking_get_export); 
endfunction

// -------------------
task my_env::main_phase(uvm_phase phase);  //重点看这里
   my_sequence seq;
   phase.raise_objection(this);
   seq = my_sequence::type_id::create("seq");
   seq.start(i_agt.sqr);   //指定发送给哪个sequencer
   phase.drop_objection(this);
endtask
// --------------------
`endif复制