device_fpga_cw305.c

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// Copyright lowRISC contributors (OpenTitan project).
// Licensed under the Apache License, Version 2.0, see LICENSE for details.
// SPDX-License-Identifier: Apache-2.0
 
#include <stdbool.h>
 
#include "sw/device/lib/arch/device.h"
#include "sw/device/lib/base/macros.h"
#include "sw/device/silicon_creator/lib/drivers/ibex.h"
#include "sw/device/silicon_creator/lib/drivers/uart.h"
 
#include "uart_regs.h"
 
/**
 * @file
 * @brief Device-specific symbol definitions for the ChipWhisperer CW305 device.
 */
 
const device_type_t kDeviceType = kDeviceFpgaCw305;
 
const uint64_t kClockFreqCpuMhz = 10;
 
const uint64_t kClockFreqCpuHz = kClockFreqCpuMhz * 1000 * 1000;
 
uint64_t to_cpu_cycles(uint64_t usec) { return usec * kClockFreqCpuMhz; }
 
const uint64_t kClockFreqPeripheralHz = 25 * 100 * 1000;  // 2.5MHz
 
const uint64_t kClockFreqUsbHz = 48 * 1000 * 1000;  // 48MHz
 
const uint64_t kClockFreqAonHz = 200 * 1000;  // 200kHz
 
const uint64_t kUartBaudrate = 115200;
 
const uint32_t kUartNCOValue =
    CALCULATE_UART_NCO(kUartBaudrate, kClockFreqPeripheralHz);
 
const uint32_t kUartBaud115K =
    CALCULATE_UART_NCO(115200, kClockFreqPeripheralHz);
const uint32_t kUartBaud230K =
    CALCULATE_UART_NCO(115200 * 2, kClockFreqPeripheralHz);
const uint32_t kUartBaud460K =
    CALCULATE_UART_NCO(115200 * 4, kClockFreqPeripheralHz);
const uint32_t kUartBaud921K =
    CALCULATE_UART_NCO(115200 * 8, kClockFreqPeripheralHz);
const uint32_t kUartBaud1M33 =
    CALCULATE_UART_NCO(1333333, kClockFreqPeripheralHz);
const uint32_t kUartBaud1M50 =
    CALCULATE_UART_NCO(1500000, kClockFreqPeripheralHz);
 
const uint32_t kUartTxFifoCpuCycles = CALCULATE_UART_TX_FIFO_CPU_CYCLES(
    kUartBaudrate, kClockFreqCpuHz, UART_PARAM_TX_FIFO_DEPTH);
 
const uint32_t kAstCheckPollCpuCycles =
    CALCULATE_AST_CHECK_POLL_CPU_CYCLES(kClockFreqCpuHz);
 
uintptr_t device_test_status_address(void) { return 0; }
 
uintptr_t device_log_bypass_uart_address(void) { return 0; }
 
void device_fpga_version_print(void) {
  // This value is guaranteed to be zero on all non-FPGA implementations.
  uint32_t fpga = ibex_fpga_version();
  //                       : M O R
  const uint32_t kRom = 0x3a4d4f52;
  uart_write_imm(kRom);
  // The cast to unsigned int stops GCC from complaining about uint32_t
  // being a `long unsigned int` while the %x specifier takes `unsigned int`.
  const uint32_t kNewline = 0x0a0d;
  uart_write_hex(fpga, sizeof(fpga), kNewline);
}