//=============================AXI DRIVER CLASS====================================//
class axi_driver extends uvm_driver;
	`uvm_component_utils(axi_driver)

	virtual axi_if.DRV_MP mif;
	axi_config axi_cfg;
	axi_xtn xtn;

	function  new(string name="axi_driver", uvm_component parent);
		super.new(name,parent);
	endfunction

	function void build_phase(uvm_phase phase);
		if(!uvm_config_db#(axi_config)::get(this,"","axi_config",axi_cfg))
			`uvm_fatal(get_type_name(),"cannot get the configuration database have you set it?")
	endfunction

	function void connect_phase(uvm_phase phase)
		axi_cfg.vif=vif;
	endfunction
	 
	task run_phase(uvm_phase phase);
		forever
		begin
			seq_item_port.get_next_item(xtn);
			driver(xtn);
			seq_item_port.item_done();
		end
	endtask


	task driver();
		if(xtn.write==1)

			begin
			axi_write_address();
			axi_write_data();
			axi_write_resp();
			end
		else
			begin
			axi_read_address();
		        axi_read_data();
			end

	endtask

        task axi_write_addr(axi_xtn xtn);
                $display("start of drive_awaddr");
                mif.mst_drv_cb.AWVALID <= 1;                                 
                mif.mst_drv_cb.AWADDR <= xtn.AWADDR;
                mif.mst_drv_cb.AWSIZE <= xtn.AWSIZE;
                mif.mst_drv_cb.AWID <= xtn.AWID;
                mif.mst_drv_cb.AWLEN <= xtn.AWLEN;
                mif.mst_drv_cb.AWBURST <= xtn.AWBURST;

                @(mif.mst_drv_cb);
                wait(mif.mst_drv_cb.AWREADY)
                mif.mst_drv_cb.AWVALID <= 0;

                repeat($urandom_range(1,5))
                        @(mif.mst_drv_cb);

                $display("end of drive_awaddr");
        endtask

        task axi_write_data(axi_xtn xtn);

                $display("start of drive_wdata");
        foreach(xtn.WDATA[i])
                        begin
                                mif.drv_cb.WVALID <= 1;
                                mif.drv_cb.WDATA <= xtn.WDATA[i];
                                mif.drv_cb.WSTRB <= xtn.WSTRB[i];
                                mif.drv_cb.WID <= xtn.WID;
                                if(i==(xtn.AWLEN))
                                        mif.drv_cb.WLAST <= 1;
                                else
                                        mif.drv_cb.WLAST <= 0;

                                @(mif.drv_cb);
                                wait(mif.drv_cb.WREADY)
                                    mif.drv_cb.WVALID <= 0;
                                    mif.drv_cb.WLAST <= 0;

                                repeat($urandom_range(1,5))
                                        @(mif.drv_cb);
                        end

                $display("end of drive_wdata");
        endtask

        task axi_write_resp(axi_xtn xtn);
                $display("start of drive_bresp");
            mif.drv_cb.BREADY<=1;
           @(mif.drv_cb)
           wait(mif.drv_cb.BVALID)
              mif.drv_cb.BREADY<=0;
           repeat($urandom_range(1,5))
               @(mif.drv_cb);
            $display("end of drive_bresp");
        endtask

      task axi_read_addr(axi_xtn xtn);
                $display("start of drive_raddr");
           repeat($urandom_range(1,3))
                  @(mif.drv_cb);
           mif.drv_cb.ARID<=xtn.ARID;
           mif.drv_cb.ARLEN<=xtn.ARLEN;
           mif.drv_cb.ARSIZE<=xtn.ARSIZE;
           mif.drv_cb.ARBURST<=xtn.ARBURST;
           mif.drv_cb.ARADDR<=xtn.ARADDR;
           mif.drv_cb.ARVALID<=1;                   
                 @(mif.drv_cb);
            $display("inside drive_read_addr before wait ARREADY");
                 wait(mif.drv_cb.ARREADY)
                    mif.drv_cb.ARVALID<=0;
              repeat($urandom_range(1,5))
                    @(mif.drv_cb);

                $display("end of drive_raddr");
          
        endtask
endclass