// Copyright lowRISC contributors.
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
//
module tb;
  // dep packages
  import uvm_pkg::*;
  import dv_utils_pkg::*;
  import edn_env_pkg::*;
  import edn_test_pkg::*;

  // macro includes
  `include "uvm_macros.svh"
  `include "dv_macros.svh"

  wire clk, rst_n;
  wire devmode;
  wire intr_edn_cmd_req_done, intr_edn_fifo_err;
  wire [NUM_MAX_INTERRUPTS-1:0] interrupts;
  edn_pkg::edn_req_t [NUM_ENDPOINTS-1:0] endpoint_req;
  edn_pkg::edn_rsp_t [NUM_ENDPOINTS-1:0] endpoint_rsp;
  csrng_pkg::csrng_req_t csrng_req;
  csrng_pkg::csrng_rsp_t csrng_rsp;

  // interfaces
  clk_rst_if clk_rst_if(.clk(clk), .rst_n(rst_n));
  pins_if #(NUM_MAX_INTERRUPTS) intr_if(interrupts);
  pins_if #(1) devmode_if(devmode);
  tl_if tl_if(.clk(clk), .rst_n(rst_n));
  push_pull_if#(.HostDataWidth(csrng_pkg::GENBITS_BUS_WIDTH))   csrng_genbits_if();
  push_pull_if#(.HostDataWidth(edn_pkg::ENDPOINT_BUS_WIDTH))    endpoint_if[NUM_ENDPOINTS-1:0]();

  // dut
  edn#(.NumEndPoints(NUM_ENDPOINTS)) dut (
    .clk_i                     (clk      ),
    .rst_ni                    (rst_n    ),

    .tl_i                      (tl_if.h2d),
    .tl_o                      (tl_if.d2h),

    .edn_i                     (endpoint_req),
    .edn_o                     (endpoint_rsp),

    .csrng_cmd_i               (csrng_rsp),
    .csrng_cmd_o               (csrng_req),

    .intr_edn_cmd_req_done_o   (intr_edn_cmd_req_done),
    .intr_edn_fifo_err_o       (intr_edn_fifo_err)
  );

  // TODO: Add another push_pull_agent for cmd bus
  assign csrng_rsp.csrng_req_ready = 1'b1;
  assign csrng_rsp.csrng_rsp_ack   = 1'b0;
  assign csrng_rsp.csrng_rsp_sts   = 1'b0;
  assign csrng_rsp.genbits_valid   = csrng_genbits_if.valid;
  assign csrng_rsp.genbits_fips    = 1'b0;
  assign csrng_rsp.genbits_bus     = csrng_genbits_if.data;
  assign csrng_genbits_if.ready    = csrng_req.genbits_ready;

  for (genvar i = 0; i < NUM_ENDPOINTS; i++) begin : gen_endpoint_if
    assign endpoint_req[i].edn_req = endpoint_if[i].req;
    assign endpoint_if[i].ack      = endpoint_rsp[i].edn_ack;
    assign endpoint_if[i].data     = endpoint_rsp[i].edn_bus;
    initial begin
      uvm_config_db#(virtual push_pull_if#(.HostDataWidth(edn_pkg::ENDPOINT_BUS_WIDTH)))::set(null,
                     $sformatf("*.env.m_endpoint_agent[%0d]*", i), "vif", endpoint_if[i]);
    end
  end

  assign interrupts[CmdReqDone] = intr_edn_cmd_req_done;
  assign interrupts[FifoErr]    = intr_edn_fifo_err;

  initial begin
    // drive clk and rst_n from clk_if
    clk_rst_if.set_active();
    uvm_config_db#(virtual clk_rst_if)::set(null, "*.env", "clk_rst_vif", clk_rst_if);
    uvm_config_db#(intr_vif)::set(null, "*.env", "intr_vif", intr_if);
    uvm_config_db#(devmode_vif)::set(null, "*.env", "devmode_vif", devmode_if);
    uvm_config_db#(virtual tl_if)::set(null, "*.env.m_tl_agent*", "vif", tl_if);
    uvm_config_db#(virtual push_pull_if#(.HostDataWidth(csrng_pkg::GENBITS_BUS_WIDTH)))::set
                  (null, "*.env.m_csrng_genbits_agent*", "vif", csrng_genbits_if);
    $timeformat(-12, 0, " ps", 12);
    run_test();
  end

endmodule