Initial commit

* Bare skeleton implementation of everything * Testbench builds with Verilator * Test runs
2025-08-23 14:34:23 -07:00
commit 800e9c4008
20 changed files with 1755 additions and 0 deletions
--- a/tb/axi_agent.sv
+++ b/tb/axi_agent.sv
@@ -0,0 +1,88 @@
+// ----------------------------------------------------------------------
+// Agent to operate AXI transactions
+// This agent includes a driver, monitor, and sequencer for AXI transactions
+// ----------------------------------------------------------------------
+typedef axi_sequencer;
+
+class axi_agent extends uvm_agent;
+    agent_type_t agent_type;
+    virtual `AXI_INTF.MANAGER m_if;
+    virtual `AXI_INTF.SUBORDINATE s_if;
+
+    // Declare the sequencer and driver
+    axi_sequencer sequencer;
+    axi_driver driver;
+    axi_monitor monitor;
+
+    `uvm_component_utils_begin(axi_agent)
+        `uvm_field_enum(agent_type_t, agent_type, UVM_DEFAULT)
+    `uvm_component_utils_end
+
+    // --------------------------------------------------
+    // Constructor
+    function new(string name = "axi_agent", uvm_component parent = null);
+        super.new(name, parent);
+    endfunction
+
+    // --------------------------------------------------
+    // Set agent type
+    function void set_agent_type(agent_type_t atype);
+        agent_type = atype;
+        `uvm_info("set_agent_type", $sformatf("Agent type set to %s", agent_type.name()), UVM_LOW)
+    endfunction
+
+    // --------------------------------------------------
+    // Build phase
+    virtual function void build_phase(uvm_phase phase);
+        sequencer   = axi_sequencer::type_id::create("sequencer", this);
+        driver      = axi_driver::type_id::create("driver", this);
+        monitor     = axi_monitor::type_id::create("monitor", this);
+
+        // Propagete the agent type to driver and monitor
+        driver.set_agent_type(agent_type);
+        monitor.set_agent_type(agent_type);
+
+        if (agent_type == MANAGER) begin
+            if (!uvm_config_db#(virtual `AXI_INTF.MANAGER)::get(this, "", "axi_dvr_vif", m_if)) begin
+                `uvm_fatal("axi_agent", "AXI agent MANAGER interface not configured")
+            end
+            `uvm_info("axi_agent", $sformatf("Using AXI agent MANAGER interface: axi_dvr_vif"), UVM_LOW)
+        end else begin // if (agent_type == SUBORDINATE) begin
+            if (!uvm_config_db#(virtual `AXI_INTF.SUBORDINATE)::get(this, "", "axi_dvr_vif", s_if)) begin
+                `uvm_fatal("axi_agent", "AXI agent SUBORDINATE interface not configured")
+            end
+            `uvm_info("axi_agent", $sformatf("Using AXI agent SUBORDINATE interface: axi_dvr_vif"), UVM_LOW)
+        end
+
+        driver.set_virtual_intefaces(m_if, s_if);
+        monitor.set_virtual_intefaces(m_if, s_if);
+    endfunction
+
+    // --------------------------------------------------
+    // Connect phase
+    virtual function void connect_phase(uvm_phase phase);
+        // Connect the driver to the sequencer
+        driver.seq_item_port.connect(sequencer.seq_item_export);
+        driver.rsp_port.connect(sequencer.rsp_export);
+        // Connect the monitor to the sequencer
+        // driver.rsp_port.connect(monitor.rsp_export);
+    endfunction
+
+    // --------------------------------------------------
+    // Run phase
+    virtual function void run_phase(uvm_phase phase);
+        `uvm_info("axi_agent", $sformatf("Running AXI agent: %s as %s",
+            get_full_name(), agent_type.name()), UVM_LOW)
+    endfunction
+endclass : axi_agent
+
+// ----------------------------------------------------------------------
+class axi_sequencer extends uvm_sequencer;
+
+    `uvm_component_utils(axi_sequencer)
+
+    // Constructor
+    function new(string name, uvm_component parent);
+        super.new(name, parent);
+    endfunction
+endclass : axi_sequencer