// ----------------------------------------------------------------------
class axi_subordinate_driver extends axi_driver;

    `uvm_component_utils(axi_subordinate_driver)

    // --------------------------------------------------
    // Constructor
    function new(string name = "axi_subordinate_driver", uvm_component parent = null);
        super.new(name, parent);
    endfunction

    // --------------------------------------------------
    virtual task run_phase(uvm_phase phase);
        `uvm_info("run_phase", $sformatf("Running AXI subordinate driver: %s",
            get_full_name()), UVM_LOW)

        if (s_if == null) begin
            `uvm_error("run_phase", "subordinate interface is null, cannot respond to transactions")
        end

        forever begin
            @(posedge s_if.ARESETn);

            while (s_if.ARESETn != 0) begin
                @(posedge s_if.ACLK);

                // Following could happen on the same cycle
                if (s_if.AWVALID == 1'b1) begin
                    respond_to_write_txn();
                end

                if (s_if.ARVALID == 1'b1) begin
                    respond_to_read_txn();
                end

                @(negedge s_if.ACLK);
            end
        end
    endtask

    // ------------------------------------------------------------
    task respond_to_write_txn();
        axi_transaction req;

        req = axi_transaction::type_id::create("req");
        req.txn_type = AXI_WRITE;
        req.addr = s_if.AWADDR;
        req.data = s_if.WDATA;
        req.strb = s_if.WSTRB;

        @(posedge s_if.ACLK);

        `uvm_info("respond_to_write_txn", $sformatf("Responding to AXI write transaction:\n%s", req.sprint()), UVM_LOW)

        s_if.AWREADY = 1'b1;
    endtask

    // ------------------------------------------------------------
    task respond_to_read_txn();
        axi_transaction req;

        req = axi_transaction::type_id::create("req");
        req.txn_type = AXI_READ;
        req.addr = s_if.ARADDR;

        @(posedge s_if.ACLK);

        `uvm_info("respond_to_write_txn", $sformatf("Responding to AXI write transaction:\n%s", req.sprint()), UVM_LOW)

        s_if.ARREADY = 1'b1;
    endtask
endclass : axi_subordinate_driver