sram_empty_functest.c

// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#include <stdint.h>
 
#include "sw/device/lib/arch/device.h"
#include "sw/device/lib/dif/dif_uart.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/ottf_test_config.h"
#include "sw/device/lib/testing/test_framework/status.h"
 
#include "hw/top_earlgrey/sw/autogen/top_earlgrey.h"
 
OTTF_DEFINE_TEST_CONFIG();
 
static dif_uart_t uart;
static dif_pinmux_t pinmux;
 
bool test_main(void) {
  // Initialize UART console.
  CHECK_DIF_OK(dif_pinmux_init(
      mmio_region_from_addr(TOP_EARLGREY_PINMUX_AON_BASE_ADDR), &pinmux));
  CHECK_DIF_OK(dif_uart_init(
      mmio_region_from_addr(TOP_EARLGREY_UART0_BASE_ADDR), &uart));
  pinmux_testutils_init(&pinmux);
  CHECK(kUartBaudrate <= UINT32_MAX, "kUartBaudrate must fit in uint32_t");
  CHECK(kClockFreqPeripheralHz <= UINT32_MAX,
        "kClockFreqPeripheralHz must fit in uint32_t");
  CHECK_DIF_OK(dif_uart_configure(
      &uart, (dif_uart_config_t){
                 .baudrate = (uint32_t)kUartBaudrate,
                 .clk_freq_hz = (uint32_t)kClockFreqPeripheralHz,
                 .parity_enable = kDifToggleDisabled,
                 .parity = kDifUartParityEven,
                 .tx_enable = kDifToggleEnabled,
                 .rx_enable = kDifToggleEnabled,
             }));
  base_uart_stdout(&uart);
 
  LOG_INFO("Hello OpenTitan! We are executing from SRAM.");
 
  // Make sure that the function returns so that the CRT can notify the host.
  return true;
}