rt-thread/bsp/k230/board/board.c

/*
 * Copyright (c) 2006-2021, RT-Thread Development Team
 *
 * SPDX-License-Identifier: Apache-2.0
 *
 * Change Logs:
 * Date           Author       Notes
 * 2021-01-30     lizhirui     first version
 */

#include <rthw.h>
#include <rtthread.h>
#include <rtdevice.h>

#include "board.h"
#include "tick.h"

#include "drv_uart.h"

#include <sbi.h>

#ifdef RT_USING_SMART
#include <mmu.h>
#include "page.h"

/* respect to boot loader, must be 0xFFFFFFC000200000 */
RT_STATIC_ASSERT(kmem_region, KERNEL_VADDR_START == 0xFFFFFFC000220000);

rt_region_t init_page_region = {(rt_size_t)RT_HW_PAGE_START, (rt_size_t)RT_HW_PAGE_END};

extern size_t MMUTable[];

struct mem_desc platform_mem_desc[] = {
    {KERNEL_VADDR_START, (rt_size_t)RT_HW_PAGE_END - 1, (rt_size_t)ARCH_MAP_FAILED, NORMAL_MEM},
};

#define NUM_MEM_DESC (sizeof(platform_mem_desc) / sizeof(platform_mem_desc[0]))

#endif /* RT_USING_SMART */

#ifndef ARCH_REMAP_KERNEL
#define IOREMAP_VEND USER_VADDR_START
#else
#define IOREMAP_VEND 0ul
#endif

//初始化BSS节区
void init_bss(void)
{
    unsigned int *dst;

    dst = &__bss_start;
    while (dst < &__bss_end)
    {
        *dst++ = 0;
    }
}

static void __rt_assert_handler(const char *ex_string, const char *func, rt_size_t line)
{
    rt_kprintf("(%s) assertion failed at function:%s, line number:%d \n", ex_string, func, line);
    asm volatile("ebreak":::"memory");
}

//BSP的C入口
void primary_cpu_entry(void)
{
    //关中断
    rt_hw_interrupt_disable();
    rt_assert_set_hook(__rt_assert_handler);
    //启动RT-Thread Smart内核
    entry();
}

#define IOREMAP_SIZE (1ul << 30)

//这个初始化程序由内核主动调用，此时调度器还未启动，因此在此不能使用依赖线程上下文的函数
void rt_hw_board_init(void)
{
#ifdef RT_USING_SMART
    /* init data structure */
    rt_hw_mmu_map_init(&rt_kernel_space, (void *)(IOREMAP_VEND - IOREMAP_SIZE), IOREMAP_SIZE, (rt_size_t *)MMUTable, PV_OFFSET);

    /* init page allocator */
    rt_page_init(init_page_region);

    /* setup region, and enable MMU */
    rt_hw_mmu_setup(&rt_kernel_space, platform_mem_desc, NUM_MEM_DESC);
#endif

#ifdef RT_USING_HEAP
    /* initialize memory system */
    rt_system_heap_init(RT_HW_HEAP_BEGIN, RT_HW_HEAP_END);
#endif
    /* initalize interrupt */
    rt_hw_interrupt_init();

    /* initialize hardware interrupt */
    rt_hw_uart_init();

    rt_hw_tick_init();

#ifdef RT_USING_CONSOLE
    /* set console device */
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif /* RT_USING_CONSOLE */

#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
}

void rt_hw_cpu_reset(void)
{
    sbi_shutdown();
    while(1);
}
MSH_CMD_EXPORT_ALIAS(rt_hw_cpu_reset, reboot, reset machine);