FinalProject620/Driver.sv at master · jsmonson/FinalProject620 · GitHub

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virtual class Driver_cbs;
    virtual task pre_tx(ref MemoryTransaction t);
    endtask
    virtual task post_tx(ref MemoryTransaction t);
    endtask
  endclass

class Driver;
      mailbox #(MemoryTransaction) agt2drv;
      bit 	      first_transaction_happened;
      bit	      transaction_complete;
      event 	      reset_complete;
      event 	      drv2chk;

      MemoryTransaction tr;
	  Driver_cbs cbs[$];
	  int mem_tran_num;
	  int isInstruction = 0;
	  logic [3:0] opcode;
	  event chk2gen;
	  vLC3if lc3if;
      mailbox 	#(MemoryTransaction) drv2mon;

      function new(input mailbox #(MemoryTransaction) agt2drv, input int mem_tran_num, vLC3if lc3if, ref event chk2geni,
		   mailbox #(MemoryTransaction) drv2moni, event drv2chki);
        this.agt2drv = agt2drv;
		this.mem_tran_num = mem_tran_num;
		this.lc3if = lc3if;
	 first_transaction_happened = 0;
	 chk2gen = chk2geni;
	 drv2mon = drv2moni;
	 drv2chk = drv2chki;
	  endfunction
      task run(input int count);
	    repeat(5) @lc3if.cb; // reset
		repeat(count) begin
		   $display("@%0t: Driver: Waiting for Next Transaction!",$time);
		   agt2drv.get(tr);
		   $display("@%0t: Driver: Recieved Next Transaction id=%0d!",$time, tr.id);
		   transaction_complete = 0;
		   fork
		      begin
			 //Reset Thread
			 if (tr.rst) begin
			    $display("@%0t: Driver: Reset! Reset Cycles %d",$time, tr.reset_cycles);
			    drv2mon.put(tr);
			    repeat(tr.reset_cycles) @lc3if.cb;
			    lc3if.rst <= 1'b1;
				lc3if.cb.IRQ <= 0;
			    @lc3if.cb;
			    lc3if.rst <= 1'b0;
			 end
			 -> reset_complete;
		      end // End Reset Thread
		      begin : TransactionThread //Transaction Thread
			 while (!$root.top.LC3.ldMAR && $root.top.LC3.CONTROL.state != 0) begin // f0
			    $display("@%0d: Driver: Stepping Clock", $time);
			    @lc3if.cb;
			    ->drv2chk;
			 end
			 //$display("@%0d: Driver: DUT Current State: %0d ldMAR=%0d", $time, $root.top.LC3.CONTROL.state,$root.top.LC3.ldMAR);
			 if(!$root.top.LC3.CONTROL.state && first_transaction_happened) begin
			    $display("@%0d:DRIVER: In FETCH0, waiting for Checker to Synchronize",$time);
			    wait(chk2gen.triggered());
			    isInstruction = 1;
			    $display("@%0d:DRIVER: Received chk2gen", $time);
			 end

			 if ($root.top.LC3.ldMAR) begin
			    if (isInstruction) begin
			       opcode = tr.Opcode;
			       isInstruction = 0;
			    end
			    foreach(cbs[i]) cbs[i].pre_tx(tr); // callbacks
			    first_transaction_happened = 1;
			    transmit(tr);
			    foreach (cbs[i]) cbs[i].post_tx(tr);
			 end // if ($root.top.LC3.ldMAR)
			 transaction_complete = 1;
		      end //End Transaction Thead

		      begin : WatchThread
			 if(tr.rst) begin
			    wait(reset_complete.triggered());
			    if(!transaction_complete) begin
			      lc3if.cb.memRDY <= 0;
			      disable TransactionThread;
			    end
		    	 end
		      end

		   join

		  end // repeat on Instructions
    endtask
	task transmit(MemoryTransaction tr);
		@lc3if.cb;
		$display("@%0d: Driver: Driving Transaction %0d",$time, tr.ID());
			repeat(mem_tran_num) @lc3if.cb;
			lc3if.cb.IRQ <= tr.IRQ;
			if (tr.IRQ == 1) begin
				lc3if.cb.INTV <=tr.INTV;
				lc3if.cb.INTP <= tr.INTP;
			end
			lc3if.cb.memory_dout <= tr.DataOut;
			lc3if.cb.MemoryMappedIO_in <= tr.MemoryMappedIO_in;
			lc3if.cb.MCR <= tr.MCR;
			lc3if.cb.memRDY <= 1;
			@lc3if.cb;
			lc3if.cb.memRDY <= 0;
	endtask
  endclass