board.c

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2019-07-23     tyustli      first version
 *
 */
#include <stddef.h>
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"

#ifdef RT_USING_SERIAL
#include <drv_usart.h>
#endif

/*  System Tick Configuration */
static void systick_config(rt_uint32_t ticks) {
    /* set value */
    *(rt_uint64_t *) (TMR_CTRL_ADDR + TMR_MTIMECMP) = ticks;
    /* enable interrupt */
    eclic_irq_enable(CLIC_INT_TMR, 0, 0);
    /* clear value */
    *(rt_uint64_t *) (TMR_CTRL_ADDR + TMR_MTIME) = 0;
}

/* This is the timer interrupt service routine. */
void eclic_mtip_handler(void) {
    /* clear value */
    *(rt_uint64_t *) (TMR_CTRL_ADDR + TMR_MTIME) = 0;

    /* enter interrupt */
    rt_interrupt_enter();
    /* tick increase */
    rt_tick_increase();

    /* leave interrupt */
    rt_interrupt_leave();
}

/* fixed misaligned bug for qemu */
void *__wrap_memset(void *s, int c, size_t n)
{
    return rt_memset(s, c, n);
}

void rt_hw_board_init(void) {
extern void riscv_clock_init(void);
    riscv_clock_init();
    systick_config(TMR_FREQ / RT_TICK_PER_SECOND);

#ifdef RT_USING_HEAP
    rt_system_heap_init((void *) HEAP_BEGIN, (void *) HEAP_END);
#endif

    /* USART driver initialization is open by default */
#ifdef RT_USING_SERIAL
    rt_hw_usart_init();
#endif

    /* Set the shell console output device */
#ifdef RT_USING_CONSOLE
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif

    /* Board underlying hardware initialization */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
}

/******************** end of file *******************/