107 lines
4.5 KiB
Systemverilog
107 lines
4.5 KiB
Systemverilog
// ----------------------------------------------------------------------
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// Agent to operate AXI transactions
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// This agent includes a driver, monitor, and sequencer for AXI transactions
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// ----------------------------------------------------------------------
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typedef axi_sequencer;
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class axi_agent extends uvm_agent;
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axi_agent_type_t agent_type;
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virtual `AXI_INTF.MANAGER m_if;
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virtual `AXI_INTF.SUBORDINATE s_if;
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virtual `AXI_INTF mon_if;
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// Declare the sequencer and driver
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axi_sequencer sequencer;
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axi_driver driver;
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axi_monitor monitor;
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`uvm_component_utils_begin(axi_agent)
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`uvm_field_enum(axi_agent_type_t, agent_type, UVM_DEFAULT)
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`uvm_component_utils_end
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// --------------------------------------------------
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// Constructor
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function new(string name = "axi_agent", uvm_component parent = null);
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super.new(name, parent);
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endfunction
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// --------------------------------------------------
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// Set agent type
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function void set_agent_type(axi_agent_type_t atype);
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agent_type = atype;
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`uvm_info("set_agent_type", $sformatf("Agent type set to %s", agent_type.name()), UVM_LOW)
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endfunction
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// --------------------------------------------------
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// Build phase
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virtual function void build_phase(uvm_phase phase);
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sequencer = axi_sequencer::type_id::create("sequencer", this);
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if (agent_type == MANAGER) begin
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// TODO: Additional variable md should not be needed. We should
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// able to use the 'driver' variable directly. But in Verilator
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// it results in an error: "No common base class exists"
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axi_manager_driver md = axi_manager_driver::type_id::create("driver", this);
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driver = md;
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end else begin // if (agent_type == SUBORDINATE) begin
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axi_subordinate_driver sd = axi_subordinate_driver::type_id::create("driver", this);
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driver = sd;
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end
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monitor = axi_monitor::type_id::create("monitor", this);
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// Propagete the agent type to driver and monitor
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driver.set_agent_type(agent_type);
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monitor.set_agent_type(agent_type);
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// Acquire the virtual interfaces from the configuration database
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if (agent_type == MANAGER) begin
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if (!uvm_config_db#(virtual `AXI_INTF.MANAGER)::get(this, "", "axi_dvr_vif", m_if)) begin
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`uvm_fatal("axi_agent", "AXI agent MANAGER interface not configured")
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end
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`uvm_info("axi_agent", $sformatf("Using AXI agent MANAGER interface: axi_dvr_vif"), UVM_LOW)
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end else begin // if (agent_type == SUBORDINATE) begin
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if (!uvm_config_db#(virtual `AXI_INTF.SUBORDINATE)::get(this, "", "axi_dvr_vif", s_if)) begin
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`uvm_fatal("axi_agent", "AXI agent SUBORDINATE interface not configured")
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end
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`uvm_info("axi_agent", $sformatf("Using AXI agent SUBORDINATE interface: axi_dvr_vif"), UVM_LOW)
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end
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if (!uvm_config_db#(virtual `AXI_INTF)::get(this.get_parent(), "", "axi_mon_vif", mon_if)) begin
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`uvm_fatal("axi_agent", "AXI monitor interface not configured")
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end
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`uvm_info("axi_agent", $sformatf("Using AXI monitor interface: axi_mon_vif"), UVM_LOW)
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// Propagate the virtual interfaces to driver and monitor
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driver.set_virtual_interfaces(m_if, s_if);
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monitor.set_virtual_interfaces(m_if, s_if);
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monitor.set_monitor_virtual_interface(mon_if);
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endfunction
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// --------------------------------------------------
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// Connect phase
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virtual function void connect_phase(uvm_phase phase);
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// Connect the driver to the sequencer
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driver.seq_item_port.connect(sequencer.seq_item_export);
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driver.rsp_port.connect(sequencer.rsp_export);
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// Connect the monitor to the sequencer
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// driver.rsp_port.connect(monitor.rsp_export);
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endfunction
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// --------------------------------------------------
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// Run phase
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virtual function void run_phase(uvm_phase phase);
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`uvm_info("axi_agent", $sformatf("Running AXI agent: %s as %s",
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get_full_name(), agent_type.name()), UVM_LOW)
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endfunction
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endclass : axi_agent
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// ----------------------------------------------------------------------
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class axi_sequencer extends uvm_sequencer;
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`uvm_component_utils(axi_sequencer)
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// Constructor
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function new(string name, uvm_component parent);
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super.new(name, parent);
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endfunction
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endclass : axi_sequencer
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