axi_driver

axi_driver.sv

@@ -0,0 +1,460 @@
+class driver extends uvm_driver #(seq);
+ `uvm_component_utils(driver)
+
+virtual axi_driver_if vif;
+sequence seq;
+  
+  function new(string name="driver", uvm_component parent=null);
+ super.new(name, parent);
+ endfunction
+
+  virtual function void build_phase(uvm_phase phase);
+    super.build_phase(phase);
+    seq=sequence::type_id::create("seq");
+    if(!uvm_config_db#(virtual axi_driver_if)::get(this," ","vif",vif))
+      `uvm_error("driver"," Interface not set");
+  endfunction
+ 
+  task reset();
+    begin
+      
+  		vif.awvalid     	<= 0;
+  		vif.awready		<= 0;
+  		vif.awid 		<= 0;
+  		vif.awlen 		<= 0;
+ 		vif.awsize 		<= 0;
+ 		vif.awaddr 		<= 0;   
+                vif.awburst		<= 0; 
+  		vif.wvalid 		<= 0;
+  		vif.wready		<= 0;
+  		vif.wid 		<= 0;
+  		vif.wdata 		<= 0;
+ 		vif.wstrb 		<= 0;
+ 		vif.wlast 		<= 0; 
+   		vif.bready 		<= 0;
+  		vif.bvalid 		<= 0;
+ 		vif.bid 		<= 0;
+ 		vif.bresp 		<= 0;        
+  		vif.arvalid 	        <= 0;
+  		vif.arready		<= 0;
+  		vif.arid 		<= 0;
+  		vif.arlen 		<= 0;
+ 		vif.arsize 		<= 0;
+ 		vif.araddr 		<= 0;   
+               vif.arburst		<= 0;      
+   		vif.rvalid       	<= 0;
+		vif.rready		<= 0;
+  		vif.rid 		<= 0;
+  		vif.rdata 		<= 0;
+ 		vif.rstrb 		<= 0;
+ 		vif.rlast 		<= 0;   
+               vif.rresp		<= 0;         
+      @(posedge vif.clk);
+      `uvm_info(get_type_name(),"reset applied",UVM_MEDIUM)      
+  end
+ endtask
+  virtual task run_phase(uvm_phase phase);
+    reset();   
+   seq_tem_port.get_next_item(txn); 
+    if(wr_rd==1)
+          begin
+          wrtie_address();
+	  write_data();
+	  write_response();
+          end
+  else
+          begin
+	  read_address();
+	  read_data();
+          end
+  endtask
+   virtual task write_address();
+        vif.awready<=0;
+        vif.awaddr<= txn.awaddr;
+        vif.awsize<= txn.awsize;
+        vif.awlen<= txn.awlen;
+        vif.awcache<= txn.awcache;
+        vif.awburst<= txn.awburst;
+        vif.awvalid<=1'b1;
+        case (txn.awburst)
+		2'b00 : write_ad_fixed_burst;
+		2'b01 : write_ad_incr_burst;
+		2'b10 : write_ad_wrap_burst;
+	endcase
+	while(vif.awready==0)
+	$display("within loop");
+begin
+	@(posedge vif.clk);
+	if(vif.awvalid==1)
+	begin 
+	awready=1;
+	$display("write address phase is completed");
+end
+end
+vif.awvalid=0;
+endtask
+
+////////////////// wridte_fixed burst////////////////
+ virtual task write_ad_fixed_burst();
+        vif.awlen  <= txn.awlen;
+        vif.awid   <= txn.awid;
+	vif.awaddr <= txn.awaddr;
+	vif.awsize<= txn.awsize;
+	vif.awvalid<= 1;
+      wait(vif.awready);
+	vif.awvalid<=0;
+	write_data();
+endtask
+ virtual task write_data();
+     vif.wready<=0;
+    for(int i=0;i<=txn.awlen+1;i++) begin
+	    $display("write data started");
+	    vif.wdata<=txn.wdata[i];
+	    vif.wstrb<=txn.wstrb[i];
+	    vif.wid<=txn.wid;
+	    vif.wvalid<=1'b1;
+	    if(i=txn.awlen+1) vif.wlast=1;
+	    while (wready=0)
+    begin @(posedge vif.clk)
+    if (vif.wready==1)
+	    txn.wready=1;
+    end
+    vif.wlast=0;
+    vif.wvalid=0;
+    vif.wready=0;
+    $display("write data completed");
+        end
+	write_ad_incr();
+    endtask
+
+//////////////////////write_address_incremental/////////////////
+virtual task write_ad_incr();
+        vif.awlen  <= txn.awlen;
+	for(int i=0; i<(txn.awlen +1);i++)
+        vif.awid   <= txn.awid;
+	vif.awaddr <= txn.awaddr;
+	vif.awsize<= txn.awsize;
+	txn.awaddr<= txn.awaddr+(2**awsize);
+	vif.awvalid<= 1;
+      wait(vif.awready);
+	vif.awvalid<=0;
+	write_data();
+endtask
+ virtual task write_data();
+     vif.wready<=0;
+    for(int i=0;i<=txn.awlen+1;i++) begin
+	    $display("write data started");
+	    vif.wdata<=txn.wdata[i];
+	    vif.wstrb<=txn.wstrb[i];
+	    vif.wid<=txn.wid;
+	    vif.wvalid<=1'b1;
+	    if(i=txn.awlen+1) vif.wlast=1;
+	    while (wready=0)
+    begin @(posedge vif.clk)
+    if (vif.wready==1)
+	    txn.wready=1;
+    end
+    vif.wlast=0;
+    vif.wvalid=0;
+    vif.wready=0;
+    $display("write data completed");
+    write_ad_wrap();
+    end
+    endtask
+
+    ///////////wri_address_wrap///////////////////////
+    virtual task write_ad_wrap();
+    vif.awlen  <= '{1,3,7,15};
+        vif.awid   <= txn.awid;
+	vif.awaddr <= txn.awaddr;
+	vif.awsize<= txn.awsize;
+
+     begin
+	     int burst_length=(awlen+1);
+	     int burst_size=(awsize+1);
+	     int lower_boundary=INT[awaddr/(burst_length*burst_size)]*(burst_length*burst_size);
+	     int upper_boundary=lower_boundar+(burst_length*burst_size);
+	      for (int i=0; i< (pkt.awlen+1);i++)
+             begin	     
+              if(vif.awaddr==upper_boundary)
+		      vif.awaddr=lower_boundary;
+	      else
+      vif.awaddr <= vif.awaddr+ (2**vif.awsize);
+	vif.awvalid<= 1;
+      wait(vif.awready);
+	vif.awvalid<=0;
+end
+      write_data();
+      endtask
+
+      virtual task write_data();
+                    vif.wready<=0;
+    for(int i=0;i<=txn.awlen+1;i++) begin
+	    $display("write data started");
+	    vif.wdata<=txn.wdata[i];
+	    vif.wstrb<=txn.wstrb[i];
+	    vif.wid<=txn.wid;
+	    vif.wvalid<=1'b1;
+	    if(i=txn.awlen+1) vif.wlast=1;
+	    while (wready=0)
+    begin @(posedge vif.clk)
+    if (vif.wready==1)
+	    txn.wready=1;
+    end
+    vif.wlast=0;
+    vif.wvalid=0;
+    vif.wready=0;
+    $display("write data completed");
+    write_response();
+    end
+    endtask
+  virtual task write_response();
+  if(vif.wvalid&&vif.wready&&vif.wlast)
+      wait(bvalid)
+     begin	
+	vif.bid = pkt.bid;
+	vif.bresp = pkt.bresp;
+      end	
+	vif.bready <= 1	 ;
+     for(i=0;i<=awlen+1;i++)
+         begin 	     
+	  if(vif.awid==vif.bid)
+               case(vif.bresp)
+		       2'b00:"okay";
+		       2'b01:"exclusive okay";
+		       2'b10:"slave error";
+		       2'b11:"decode error";
+	       endcase
+       end
+	       vif.bready<=0;
+       endtask
+
+
+  ///////////////////////Read address////////////////////////////////////////////////
+
+
+       task read_adress();
+
+	`uvm_info("master_driver",$sformatf("message from driver\n %s",pkt.sprint()),UVM_HIGH)
+
+	vif.arid <= pkt.arid;
+	vif.araddr <= pkt.araddr;
+	vif.arlen <= pkt.arlen;
+	vif.arsize <= pkt.arsize;
+	vif.arburst <= pkt.arburst;
+	vif.arvalid <= 1;
+	`uvm_info("master_driver",$sformatf("message from driver \n %s",pkt.sprint()),UVM_HIGH)
+	
+	case (txn.arburst)
+
+		2'b00 : read_address_fixed_burst;
+		2'b01 : read_address_incr_burst;
+		2'b10 : read_address_wrap_burst;
+
+	endcase
+
+	@(posedge vif.clk);
+		
+	wait (vif.arready);
+
+	vif.arvalid <= 0;
+	
+endtask
+//////////////////////////////////////// raed wrap burst////////////////////
+ virtual task read_ad_wrap();
+    vif.awlen  <= '{1,3,7,15};
+        vif.arid   <= txn.arid;
+	vif.araddr <= txn.araddr;
+	vif.arsize<= txn.arsize;
+
+     begin
+	     int burst_length=(arlen+1);
+	     int burst_size=(arsize+1);
+	     int lower_boundary=INT[araddr/(burst_length*burst_size)]*(burst_length*burst_size);
+	     int upper_boundary=lower_boundar+(burst_length*burst_size);
+	      for (int i=0; i< (txn.arlen+1);i++)
+             begin	     
+              if(vif.araddr==upper_boundary)
+		      vif.araddr=lower_boundary;
+	      else
+      vif.araddr <= vif.araddr+ (2**vif.arsize);
+	vif.arvalid<= 1;
+      wait(vif.arready);
+	vif.arvalid<=0;
+end
+      read_data1();
+      endtask
+
+  virtual task read_data1();
+                    vif.rready<=0;
+    for(int i=0;i<=txn.arlen+1;i++) begin
+	    $display("read data started");
+	    vif.rdata<=txn.rdata[i];
+	    vif.rid<=txn.rid;
+	    vif.rvalid<=1'b1;
+	    if(i=txn.arlen+1) vif.rlast=1;
+	    while (rready=0)
+    begin @(posedge vif.clk)
+    if (vif.rready==1)
+	    txn.rready=1;
+    end
+    vif.rlast=0;
+    vif.rvalid=0;
+      $display("read data completed");
+    end
+	foreach (vif.rdata[i])
+	begin	
+		if (vif.arid == vif.rid)
+		begin
+			case (vif.rresp)
+
+				2'b00 : s = "Transaction OKAY";
+				2'b01 : s = "Transaction FAILED";
+				2'b10 : s = "SLAVE ERROR";
+				2'b11 : s = "DEEOCDE ERROR";
+			
+			endcase
+				
+		`uvm_info("axi master_driver",$sformatf("\n t %s response for the received data \n",s),UVM_MEDIUM)
+	
+		end
+	end
+	
+	vif.rready <= 0;
+
+endtask
+
+
+
+
+////////////////////////////////////////  INCR address    ////////////////
+task read_address_incr_burst();
+	vif.arlen <=txn.arlen;
+	for(int i=0; i<(arlen +1);i++)
+	begin
+		vif.araddr<=txn.araddr;
+        	vif.arid   <= txn.arid;
+		vif.arvalid<= 1;
+		txn.araddr<= txn.araddr +(2**vif.arsize);
+		wait(vif.arready);
+		vif.arvalid<=0;
+
+	end
+read_data();
+endtask
+
+ virtual task read_data();
+                    vif.rready<=0;
+    for(int i=0;i<=txn.arlen+1;i++) begin
+	    $display("read data started");
+	    vif.rdata<=txn.rdata[i];
+	    vif.rid<=txn.rid;
+	    vif.rvalid<=1'b1;
+	    if(i=txn.arlen+1) vif.rlast=1;
+	    while (rready=0)
+    begin @(posedge vif.clk)
+    if (vif.rready==1)
+	    txn.rready=1;
+    end
+    vif.rlast=0;
+    vif.rvalid=0;
+      $display("read data completed");
+end	
+	vif.rready <= 1;
+	
+	foreach (vif.rdata[i])
+	begin	
+		if (vif.arid == vif.rid)
+		begin
+			case (vif.rresp)
+
+				2'b00 : s = "Transaction OKAY";
+				2'b01 : s = "Transaction FAILED";
+				2'b10 : s = "SLAVE ERROR";
+				2'b11 : s = "DEEOCDE ERROR";
+			
+			endcase
+				
+		`uvm_info("master_driver",$sformatf("\n\t %s response for the recieved data \n",s),UVM_MEDIUM)
+	
+		end
+	end
+	
+	vif.rready <= 0;
+	
+endtask
+///////////////read address fixed burst////////////////////////
+task read_address_fixed_burst ();
+begin
+	vif.arlen  <= txn.arlen;
+        vif.arid   <= txn.arid;
+	vif.araddr <= txn.araddr;
+	vif.arvalid<= 1;
+wait(vif.arready);
+	vif.arvalid<=0;
+	end 
+	rd_dt_fixed_burst();
+
+endtask
+
+
+
+task rd_dt_fixed_burst ();
+	    vif.rready<=0;
+    for(int i=0;i<=txn.arlen+1;i++) begin
+	    $display("read data started");
+	    vif.rdata<=txn.rdata[i];
+	    vif.rid<=txn.rid;
+	    vif.rvalid<=1'b1;
+	    if(i=txn.arlen+1) vif.rlast=1;
+	    while (rready=0)
+    begin @(posedge vif.clk)
+    if (vif.rready==1)
+	    txn.rready=1;
+    end
+    vif.rlast=0;
+    vif.rvalid=0;
+      $display("read data completed");
+end	
+	foreach (vif.rdata[i])
+	begin	
+		if (vif.arid == vif.rid)
+		begin
+			case (vif.rresp)
+
+				2'b00 : s = "Transaction OKAY";
+				2'b01 : s = "Transaction FAILED";
+				2'b10 : s = "SLAVE ERROR";
+				2'b11 : s = "DEEOCDE ERROR";
+			
+			endcase
+				
+		`uvm_info("master_driver",$sformatf("\n\t %s response for recieved data \n",s),UVM_MEDIUM)
+	
+		end
+	end
+	
+	vif.rready <= 0;
+
+endtask
+      
+      if(txn.reset==1) begin
+       reset();
+     end     
+      //Write operation support
+      else if(txn.wr_rd==1) begin  
+        `uvm_info(get_type_name()," write packet is received in driver ",UVM_MEDIUM) 
+begin
+	write_address();
+end
+          
+    //read operation support
+      else if( txn.wr_rd==0) 
+      begin    
+	read_address();
+      end   
+ 	seq_item_port.item_done();
+ end
+ endtask
+endclass
+