1 files changed, 53 insertions, 0 deletions
diff --git a/homework_2/SRC/scoreboard.sv b/homework_2/SRC/scoreboard.sv
new file mode 100644
index 0000000..c442f57
--- /dev/null
+++ b/homework_2/SRC/scoreboard.sv
@@ -0,0 +1,53 @@
+// the design routes packets based on an address range, the
+// scoreboard checks that the packet's address is within valid
+// range.
+class scoreboard extends uvm_scoreboard;
+  `uvm_component_utils(scoreboard)
+  function new(string name="scoreboard", uvm_component parent=null);
+    super.new(name, parent);
+  endfunction
+`define LENGTH 4 
+  	bit[`LENGTH-1:0] 	ref_pattern;
+  	bit[`LENGTH-1:0] 	act_pattern;
+	bit 				exp_out;
+  
+  uvm_analysis_imp #(Item, scoreboard) m_analysis_imp;
+    
+  virtual function void build_phase(uvm_phase phase);
+    super.build_phase(phase);
+
+    m_analysis_imp = new("m_analysis_imp", this);
+    if (!uvm_config_db#(bit[`LENGTH-1:0])::get(this, "*", "ref_pattern", ref_pattern))
+			`uvm_fatal("SCBD", "Did not get ref_pattern !")
+  endfunction
+  
+  virtual function write(Item item);        
+    act_pattern = act_pattern << 1 | item.in;
+    
+    `uvm_info("SCBD", $sformatf("in=%0d out=%0d ref=0b%0b act=0b%0b", 
+                               item.in, item.out, ref_pattern, act_pattern), UVM_LOW)
+
+    // Always check that expected out value is the actual observed value
+    // Since it takes 1 clock for out to be updated after pattern match, 
+    // do the check first and then update exp_out value
+    if (item.out != exp_out) begin
+      `uvm_error("SCBD", $sformatf("ERROR ! out=%0d exp=%0d", 
+                                   				item.out, exp_out))
+    end else begin
+      `uvm_info("SCBD", $sformatf("PASS ! out=%0d exp=%0d", 
+                                  item.out, exp_out), UVM_HIGH)
+    end
+
+    // If current index has reached the full pattern, then set exp_out to be 1
+    // which will be checked in the next clock. If pattern is not complete, keep
+    // exp_out to zero
+    if (!(ref_pattern ^ act_pattern)) begin
+      `uvm_info("SCBD", $sformatf("Pattern found to match, next out should be 1"), UVM_LOW)
+		exp_out = 1;
+    end else begin
+      exp_out = 0;
+    end
+		
+  endfunction
+endclass
+      
+\ No newline at end of file