text: // Copyright lowRISC contributors.
  // Licensed under the Apache License, Version 2.0, see LICENSE for details.
  // SPDX-License-Identifier: Apache-2.0
  
  #include "sw/device/lib/arch/device.h"
  #include "sw/device/lib/base/mmio.h"
  #include "sw/device/lib/dif/dif_pinmux.h"
  #include "sw/device/lib/dif/dif_uart.h"
  #include "sw/device/lib/runtime/hart.h"
  #include "sw/device/lib/runtime/log.h"
  #include "sw/device/lib/runtime/print.h"
  #include "sw/device/lib/testing/pinmux_testutils.h"
  #include "sw/device/lib/testing/test_framework/check.h"
  #include "sw/device/lib/testing/test_framework/status.h"
  
  #include "hw/top_earlgrey/sw/autogen/top_earlgrey.h"  // Generated.
  
  static dif_pinmux_t pinmux;
  static dif_uart_t uart0;
  
  bool rom_test_main(void) {
    // We need to set the test status as "in test" to indicate to the test code
    // has been reached, even though this test is also in the "boot ROM".
    test_status_set(kTestStatusInTest);
    CHECK_DIF_OK(dif_pinmux_init(
        mmio_region_from_addr(TOP_EARLGREY_PINMUX_AON_BASE_ADDR), &pinmux));
    pinmux_testutils_init(&pinmux);
  
    // We need to initialize the UART regardless if we LOG any messages, since
    // Verilator and FPGA platforms use the UART to communicate the test results.
    if (kDeviceType != kDeviceSimDV) {
      CHECK_DIF_OK(dif_uart_init(
          mmio_region_from_addr(TOP_EARLGREY_UART0_BASE_ADDR), &uart0));
      CHECK_DIF_OK(
          dif_uart_configure(&uart0, (dif_uart_config_t){
                                         .baudrate = kUartBaudrate,
                                         .clk_freq_hz = kClockFreqPeripheralHz,
                                         .parity_enable = kDifToggleDisabled,
                                         .parity = kDifUartParityEven,
                                     }));
      base_uart_stdout(&uart0);
    }
  
    bool result = false;
  
    /**
     * Place test code here.
     */
  
    return result;
  }
  