Mahesh Asolkar
800e9c4008
* Bare skeleton implementation of everything * Testbench builds with Verilator * Test runs
120 lines
4.5 KiB
Systemverilog
120 lines
4.5 KiB
Systemverilog
// ----------------------------------------------------------------------
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// Driver for AXI transactions
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// ----------------------------------------------------------------------
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class axi_driver extends uvm_driver; // #(axi_transaction);
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virtual `AXI_INTF.MANAGER m_if;
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virtual `AXI_INTF.SUBORDINATE s_if;
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agent_type_t agent_type;
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`uvm_component_utils(axi_driver)
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// --------------------------------------------------
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// Constructor
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function new(string name = "axi_driver", 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(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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// Set virtual interfaces
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function void set_virtual_intefaces(virtual `AXI_INTF.MANAGER m_if_p,
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virtual `AXI_INTF.SUBORDINATE s_if_p);
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`uvm_info("set_virtual_intefaces", $sformatf("Setting virtual interfaces"), UVM_LOW)
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m_if = m_if_p;
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s_if = s_if_p;
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// if (m_if == null && s_if == null) begin
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// `uvm_fatal("AXI_DRIVER", "Both MANAGER and SUBORDINATE interfaces are null")
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// end else if ((agent_type == MANAGER) && (m_if == null)) begin
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// `uvm_error("AXI_DRIVER", $sformatf("MANAGER interface is null"))
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// end else if ((agent_type == SUBORDINATE) && (s_if == null)) begin
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// `uvm_error("AXI_DRIVER", $sformatf("SUBORDINATE interface is null"))
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// end
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endfunction
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// --------------------------------------------------
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// Run phase
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virtual task run_phase(uvm_phase phase);
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`uvm_info("axi_driver", $sformatf("Running AXI driver: %s as %s",
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get_full_name(), agent_type.name()), UVM_LOW)
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if (agent_type == MANAGER) begin
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`uvm_info("axi_driver", $sformatf("Manager agent detected, driving transactions"), UVM_LOW)
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drive_transactions();
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end else if (agent_type == SUBORDINATE) begin
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`uvm_info("axi_driver", $sformatf("Subordinate agent detected, responding to transactions"), UVM_LOW)
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respond_to_transactions();
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end else begin
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`uvm_fatal("AXI_DRIVER", "Unknown agent type")
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end
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endtask
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// ------------------------------------------------------------
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task drive_transactions();
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if (m_if == null) begin
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`uvm_error("AXI_DRIVER", "MANAGER interface is null, cannot drive transactions")
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end
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forever begin
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`uvm_info("axi_driver", $sformatf("Starting to drive transactions for %s (rst_n = %0b)",
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get_full_name(), m_if.ARESETn), UVM_LOW)
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if (m_if.ARESETn == 0) begin
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`uvm_info("axi_driver", $sformatf("Waiting for reset to be released (rst_n = %0b)",
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m_if.ARESETn), UVM_LOW)
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@(posedge m_if.ARESETn);
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end
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`uvm_info("axi_driver", $sformatf("Starting to drive transactions for %s (rst_n = %0b)",
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get_full_name(), m_if.ARESETn), UVM_LOW)
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while (m_if.ARESETn != 0) begin
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uvm_sequence_item txn;
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`uvm_info("axi_driver", $sformatf("Waiting for next transaction"), UVM_LOW)
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seq_item_port.get_next_item(txn);
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drive_item(txn);
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seq_item_port.item_done();
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end
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end
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endtask
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// ------------------------------------------------------------
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task drive_item(uvm_sequence_item txn);
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axi_transaction req;
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if (!$cast(req, txn)) begin
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`uvm_fatal("AXI_DRIVER", "Invalid transaction type")
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end
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`uvm_info("drive_item", $sformatf("Driving AXI transaction:\n%s", req.sprint()), UVM_LOW)
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@(posedge m_if.ACLK);
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m_if.AWVALID = 1;
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m_if.AWADDR = req.addr;
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@(posedge m_if.ACLK);
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m_if.WDATA = req.data;
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m_if.WSTRB = req.strb;
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`uvm_info("drive_item", $sformatf("Driving AXI transaction done."), UVM_LOW)
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endtask
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// ------------------------------------------------------------
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task respond_to_transactions();
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forever begin
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@(posedge s_if.ARESETn);
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while (s_if.ARESETn != 0) begin
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@(posedge s_if.ACLK);
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@(negedge s_if.ACLK);
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end
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end
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endtask
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endclass : axi_driver
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