C++ (Cpp) mips_read_c0_register示例

示例#1

文件： debug.c 项目： alexrayne/uos-embedded

/*
 * Send a byte to the UART transmitter, with interrupts disabled.
 */
void
debug_putchar (void *arg, short c)
{
    int x = 0;
    int in_exception = mips_read_c0_register (C0_STATUS) & (ST_EXL | ST_ERL);

    if (! in_exception)
        mips_intr_disable (&x);

    /* Wait for transmitter holding register empty. */
    while (! (UART_LSR & LSR_TX_HOLD_EMPTY))
        continue;

again:
    /* Send byte. */
    /* TODO: unicode to utf8 conversion. */
    UART_THR = c;

    /*	watchdog_alive ();*/
    if (debug_onlcr && c == '\n') {
        /* Wait for transmitter holding register empty. */
        while (! (UART_LSR & LSR_TX_HOLD_EMPTY))
            continue;
        c = '\r';
        goto again;
    }
    if (! in_exception)
        mips_intr_restore (x);
}

示例#2

文件： debug.c 项目： alexrayne/uos-embedded

/*
 * Send a byte to the UART transmitter, with interrupts disabled.
 */
void
debug_putchar (void *arg, short c)
{
    int x = 0;
    int in_exception = mips_read_c0_register (C0_STATUS) & (ST_EXL | ST_ERL);

    if (! in_exception)
        mips_intr_disable (&x);

    /* Wait for transmitter shift register empty. */
    while (! (UxSTA & PIC32_USTA_TRMT))
        continue;

again:
    /* Send byte. */
    /* TODO: unicode to utf8 conversion. */
    UxTXREG = c;

    /* Wait for transmitter shift register empty. */
    while (! (UxSTA & PIC32_USTA_TRMT))
        continue;

    /*	watchdog_alive ();*/
    if (debug_onlcr && c == '\n') {
        c = '\r';
        goto again;
    }
    if (! in_exception)
        mips_intr_restore (x);
}

示例#3

文件： clock.c 项目： AtomSoftTech/retrobsd

/*
 * Setup core timer for `hz' timer interrupts per second.
 */
void
clkstart()
{
	unsigned count = mips_read_c0_register (C0_COUNT, 0);

	mips_write_c0_register (C0_COMPARE, 0,
                count + (CPU_KHZ * 1000 / HZ + 1) / 2);

	IECSET(0) = 1 << PIC32_IRQ_CT;
}

示例#4

文件： uartx.c 项目： alexrayne/uos-embedded

/*
 * Проверка прерывания UART.
 */
void
uartx_test_irq ()
{
	unsigned cause, errors = 0;

	UARTX_IER (0) = 0;
	UARTX_IER (1) = 0;
	UARTX_IER (2) = 0;
	udelay (10);
	cause = mips_read_c0_register (C0_CAUSE);
	if (cause & CA_IP_IRQ2) {
		debug_printf ("uartx error: incorrect /IRQ2, cause=%08x\n",
			cause);
		++errors;
	}

	UARTX_IER (0) = ~0;
	UARTX_IER (1) = ~0;
	UARTX_IER (2) = ~0;
	udelay (10);
	cause = mips_read_c0_register (C0_CAUSE);
	if (! (cause & CA_IP_IRQ2)) {
		debug_printf ("uartx error: no /IRQ2, cause=%08x\n",
			cause);
		++errors;
	}

	UARTX_IER (0) = 0;
	UARTX_IER (1) = 0;
	UARTX_IER (2) = 0;
	udelay (10);
	cause = mips_read_c0_register (C0_CAUSE);
	if (cause & CA_IP_IRQ2) {
		debug_printf ("uartx error: unexpected /IRQ2, cause=%08x\n",
			cause);
		++errors;
	}
	if (! errors) {
		debug_printf ("Testing UART interrupts: OK\n");
	}
}

示例#5

文件： test-tswitch.c 项目： Kvasshtain/uos-embedded

/*
 * Задача выдачи статистики на консоль.
 */
void console (void *arg)
{
	unsigned t0;

	for (;;) {
		t0 = mips_read_c0_register (C0_COUNT);
		mutex_signal (&mailbox, (void*) t0);

		debug_puts ("\33[H");
		debug_puts ("Measuring task switch time.\n\n");

		debug_printf ("Task switches: %u  \n\n", nmessages);

		print_rational (" Latency, min: ", latency_min * 1000, KHZ);
		print_rational ("          max: ", latency_max * 1000, KHZ);
	}
}

示例#6

文件： test-tswitch.c 项目： Kvasshtain/uos-embedded

/*
 * Задача приёма сообщений.
 */
void receiver (void *arg)
{
	unsigned t0, t1, latency;

	for (;;) {
		t0 = (unsigned) mutex_wait (&mailbox);
		t1 = mips_read_c0_register (C0_COUNT);

		/* Вычисляем количество тактов, затраченных на вход в прерывание. */
		latency = t1 - t0;

		/*debug_printf ("<%u> ", latency);*/
		if (++nmessages > 10) {
			if (latency_min > latency)
				latency_min = latency;
			if (latency_max < latency)
				latency_max = latency;
		}
	}
}