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/*
* Copyright (c) 2006-2022, 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 "mm_aspace.h"
#include "tick.h"
#include "drv_uart.h"
#include "encoding.h"
#include "stack.h"
#include "sbi.h"
#include "riscv.h"
#include "stack.h"
#include "hal_gpio.h"
#include "hal_clk.h"
#include "hal_uart.h"
#include "hal_dma.h"
#ifdef RT_USING_SMART
#include "riscv_mmu.h"
#include "mmu.h"
#include "page.h"
#include "lwp_arch.h"
// 这个结构体描述了buddy system的页分配范围
rt_region_t init_page_region =
{
(rt_size_t)RT_HW_PAGE_START,
(rt_size_t)RT_HW_PAGE_END};
// 内核页表
extern volatile rt_size_t MMUTable[__SIZE(VPN2_BIT)] __attribute__((aligned(4 * 1024)));
struct mem_desc platform_mem_desc[] = {
{KERNEL_VADDR_START, KERNEL_VADDR_START + 0x4000000 - 1, (rt_size_t)ARCH_MAP_FAILED, NORMAL_MEM},
{0x1000, 0x3ffff000 - 1, (rt_size_t)ARCH_MAP_FAILED, DEVICE_MEM},
};
#define NUM_MEM_DESC (sizeof(platform_mem_desc) / sizeof(platform_mem_desc[0]))
#endif /* RT_USING_SMART */
rt_uint64_t rt_hw_get_clock_timer_freq(void)
{
return 24000000ULL;
}
// 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
rt_hw_mmu_map_init(&rt_kernel_space, (void *)(USER_VADDR_START - IOREMAP_SIZE), IOREMAP_SIZE, (rt_size_t *)MMUTable, 0);
rt_page_init(init_page_region);
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();
/* init hal hardware */
hal_clock_init();
hal_gpio_init();
hal_dma_init();
/* init rtthread hardware */
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
}
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