new driver

axi_drv.sv

@@ -0,0 +1,126 @@
+class axi_drv extends uvm_driver#(axi_tx);
+virtual axi_intf vif;
+`uvm_component_utils(axi_drv)
+`NEW_COMP
+
+function void build_phase(uvm_phase phase);
+	super.build_phase(phase);
+	if(!uvm_config_db#(virtual axi_intf)::get(this, "", "vif", vif)) begin
+		`uvm_error("CONFG_DB", "Not able to get axi intf handle")
+	end
+endfunction
+
+task run_phase(uvm_phase phase);
+	@(negedge vif.arst);//waiting for release the reset
+	forever begin
+		seq_item_port.get_next_item(req);
+		req.print();
+		drive_tx(req);
+		seq_item_port.item_done();
+	end
+endtask
+
+task drive_tx(axi_tx tx);
+	if (tx.wr_rd == 1) begin
+		write_addr(tx);
+		write_data(tx);
+		write_resp(tx);
+	end
+	if (tx.wr_rd == 0) begin
+		read_addr(tx);
+		read_data(tx);
+	end
+endtask
+
+task write_addr(axi_tx tx);
+	`uvm_info("AXI_TX", "write_addr", UVM_MEDIUM);
+    //Master drives all write address channel signals (aw), it will drive at the posedge of clock
+    @(vif.mst_cb);
+    vif.mst_cb.awaddr <= tx.addr;
+    vif.mst_cb.awlen  <= tx.burst_len;
+    vif.mst_cb.awsize <= tx.burst_size;
+    vif.mst_cb.awburst <= tx.burst_type;
+    vif.mst_cb.awid <= tx.txid;
+    vif.mst_cb.awvalid <= 1'b1;
+    wait (vif.mst_cb.awready == 1'b1);
+    @(vif.mst_cb);
+    vif.mst_cb.awaddr <= 0;
+    vif.mst_cb.awlen  <= 0;
+    vif.mst_cb.awsize <= 0;
+    vif.mst_cb.awburst <= 0;
+    vif.mst_cb.awid <= 0;
+    vif.mst_cb.awvalid <= 0;
+endtask
+
+task write_data(axi_tx tx);
+	`uvm_info("AXI_TX", "write_data", UVM_MEDIUM);
+	for (int i = 0; i <= tx.burst_len; i++) begin
+		@(vif.mst_cb)
+		vif.mst_cb.wdata <= tx.dataQ.pop_front();
+		vif.mst_cb.wstrb <= 4'b1111; //need to be updated as per the burst size
+		vif.mst_cb.wvalid <= 1'b1;
+		vif.mst_cb.wid <= tx.txid;
+		//wlast=1 will be in last beat
+      	if(i == tx.burst_len) vif.mst_cb.wlast <= 1'b1;
+		else vif.mst_cb.wlast <= 0;
+		wait(vif.mst_cb.wready == 1'b1);
+	end
+		//once data beats are done, then reset all signals to 0
+		@(vif.mst_cb);
+		vif.mst_cb.wvalid <= 0;
+		vif.mst_cb.wlast <= 0;
+		vif.mst_cb.wdata <= 0;
+		vif.mst_cb.wstrb <= 0;
+		vif.mst_cb.wid <= 0;
+endtask
+
+task write_resp(axi_tx tx);
+bit bvalid_f = 0;
+	//`uvm_info("AXI_TX", "write_resp", UVM_MEDIUM);
+	//write response is initiated by slave
+	while (bvalid_f == 0) begin
+		@(vif.mst_cb);
+		bvalid_f = vif.mst_cb.bvalid;
+	end
+	vif.mst_cb.bready <= 1'b1;
+	@(vif.mst_cb);
+	vif.mst_cb.bready <= 1'b0;
+endtask
+
+task read_addr(axi_tx tx);
+	`uvm_info("AXI_TX", "read_addr", UVM_MEDIUM);
+	@(vif.mst_cb);
+    vif.mst_cb.araddr <= tx.addr;
+    vif.mst_cb.arlen  <= tx.burst_len;
+    vif.mst_cb.arsize <= tx.burst_size;
+    vif.mst_cb.arburst <= tx.burst_type;
+    vif.mst_cb.arid <= tx.txid;
+    vif.mst_cb.arvalid <= 1'b1;
+    wait (vif.mst_cb.arready == 1'b1);
+    @(vif.mst_cb);
+    vif.mst_cb.araddr <= 0;
+    vif.mst_cb.arlen  <= 0;
+    vif.mst_cb.arsize <= 0;
+    vif.mst_cb.arburst <= 0;
+    vif.mst_cb.arid <= 0;
+    vif.mst_cb.arvalid <= 0;
+endtask
+
+task read_data(axi_tx tx);
+bit rvalid_f = 0;
+	`uvm_info("AXI_TX", "read_data", UVM_MEDIUM);
+	//since read data is happening multiple times, then handshaking should do multiple times
+	for (int i = 0; i <= tx.burst_len; i++) begin
+		rvalid_f = 0;
+		while (rvalid_f == 0) begin
+			@(vif.mst_cb);
+			rvalid_f = vif.mst_cb.rvalid;
+			vif.mst_cb.rready <= 1'b1;
+		end
+	end
+	@(vif.mst_cb);
+	vif.mst_cb.rready <= 1'b0;	
+endtask
+  
+endclass
+