Initial commit

* Bare skeleton implementation of everything
* Testbench builds with Verilator
* Test runs

tb/test_base.sv

@@ -0,0 +1,129 @@
+// Base class for testbench tests
+class test_base extends uvm_test;
+    `uvm_component_utils(test_base)
+
+    tb_env env;
+    uvm_table_printer tb_printer;
+
+    // ------------------------------------------------------------
+    function new(string name, uvm_component parent);
+        super.new(name, parent);
+    endfunction
+
+    // ------------------------------------------------------------
+    function void build_phase(uvm_phase phase);
+        super.build_phase(phase);
+
+        env = tb_env::type_id::create("env", this);
+        tb_printer = new("tb_printer");
+
+        uvm_config_db#(tb_env)::set(uvm_root::get(), "*", "env", env);
+    endfunction
+
+    // ------------------------------------------------------------
+    virtual function void end_of_elaboration_phase(uvm_phase phase);
+        `uvm_info("end_of_elaboration_phase", $sformatf("Testbench topology:\n%s", this.sprint(tb_printer)), UVM_LOW)
+        display_uvm_config_db();
+        display_uvm_config_db("uvm_test_top.env.axi_m");
+        display_uvm_config_db("uvm_test_top.env.axi_s");
+        dump_uvm_config_db();
+    endfunction
+
+    // ------------------------------------------------------------
+    virtual task run_phase(uvm_phase phase);
+        uvm_objection objection;
+
+        objection = phase.get_objection();
+
+        `uvm_info("run_phase", $sformatf("Raising objection"), UVM_LOW)
+        phase.raise_objection(this);
+
+        run_reset_phase(phase);
+
+        run_test_phase(phase);
+
+        run_flush_phase(phase);
+
+        objection.set_drain_time(this, 20);
+        `uvm_info("run_phase", $sformatf("Dropping objection"), UVM_LOW)
+        phase.drop_objection(this);
+    endtask
+
+    // ------------------------------------------------------------
+    virtual task run_reset_phase(uvm_phase phase);
+        `uvm_info("run_reset_phase", $sformatf("Starting reset"), UVM_LOW)
+        `uvm_info("run_reset_phase", $sformatf("Finishing reset"), UVM_LOW)
+    endtask
+
+    // ------------------------------------------------------------
+    virtual task run_test_phase(uvm_phase phase);
+        `uvm_warning("run_test_phase", $sformatf("This content is expected to be implemented in specific tests"))
+    endtask
+
+    // ------------------------------------------------------------
+    virtual task run_flush_phase(uvm_phase phase);
+        `uvm_info("run_flush_phase", $sformatf("Finishing test"), UVM_LOW)
+    endtask
+
+    // ------------------------------------------------------------
+    // Function to traverse and display all entries in uvm_config_db
+    function void display_uvm_config_db(string scope = ".*");
+        uvm_resource_pool rp = uvm_resource_pool::get();
+        uvm_resource_types::rsrc_q_t resources;
+
+        // Get all resources from the resource pool
+        resources = rp.lookup_regex(scope, get_full_name());
+
+        rp.print_resources(resources, 1);
+
+        `uvm_info("CONFIG_DB", "Traversing uvm_config_db contents:", UVM_LOW)
+        if (resources.size() == 0) begin
+            `uvm_info("CONFIG_DB", "No entries found in uvm_config_db", UVM_LOW)
+            return;
+        end
+
+        // Iterate through all resources
+        do begin
+            uvm_resource_base r = resources.pop_front();
+
+            if (r == null) begin
+                `uvm_info("CONFIG_DB", "No more resources to process", UVM_LOW)
+                break;
+            end
+
+            `uvm_info("CONFIG_DB", $sformatf("Resource: %s", r.get_name()), UVM_LOW)
+        end while (1);
+    endfunction
+
+    // ------------------------------------------------------------
+    // Function to dump all entries in uvm_config_db
+    function void dump_uvm_config_db();
+        uvm_resource_pool rp = uvm_resource_pool::get();
+    endfunction
+
+endclass
+
+// ----------------------------------------------------------------------
+class test_basic extends test_base;
+    `uvm_component_utils(test_basic)
+
+    // ------------------------------------------------------------
+    function new(string name, uvm_component parent);
+        super.new(name, parent);
+    endfunction
+
+    // ------------------------------------------------------------
+    virtual task run_test_phase(uvm_phase phase);
+        axi_simple_seq seq;
+
+        `uvm_info("run_test_phase", $sformatf("Starting stimulus"), UVM_LOW)
+        #100ns;
+        seq = axi_simple_seq::type_id::create("seq");
+        if (seq == null) begin
+            `uvm_fatal("run_test_phase", "Failed to create sequence instance")
+        end
+        seq.start(env.get_axi_m_sequencer());
+
+        `uvm_info("run_test_phase", $sformatf("Finishing stimulus"), UVM_LOW)
+    endtask
+endclass