startup.c

RT-Thread是发展中的下一代微内核嵌入式实时操作系统

/*
 * File      : startup.c
 * This file is part of RT-Thread RTOS
 * COPYRIGHT (C) 2006, RT-Thread Develop Team
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.fayfayspace.org/license/LICENSE.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-09-15     QiuYi        the first version
 * 2006-10-10     Bernard      update to 0.2.2 version
 */

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

#include "board.h"

extern void rt_console_init(void);
extern void rt_hw_interrupt_init(void);
extern void rt_hw_board_init(void);
extern void rt_system_timer_init(void);
extern void rt_system_scheduler_init(void);
extern void rt_thread_idle_init(void);

extern unsigned char __bss_start[];
extern unsigned char __bss_end[];

/**
 * @addtogroup QEMU
 */
 /*@{*/

/* clear .bss */
void rt_hw_clear_bss()
{
	unsigned char *dst;
	dst = __bss_start;
	while(dst < __bss_end) *dst++ = 0;
}

extern void finsh_system_init(void);
extern int  rt_application_init(void);

/**
 * This function will startup RT-Thread RTOS
 */
void rtthread_startup()
{
	/* clear .bss */
	rt_hw_clear_bss();
	
	/* init hardware interrupt */
	rt_hw_interrupt_init();
	
	/* init the console */
	rt_console_init();
	
	/* init board */
	rt_hw_board_init();
	
	rt_show_version();
	
	/* init tick */
	rt_system_tick_init();
	
	/* init kernel object */
	rt_system_object_init();
	
	/* init timer system */
	rt_system_timer_init();
	
	/* init memory system */
#ifdef RT_USING_HEAP
	//rt_system_heap_init();
#endif
	
	/* init scheduler system */
	rt_system_scheduler_init();
	
	/* init application */
	rt_application_init();
	
	/* init the finsh input */
	rt_hw_finsh_init();
	
	/* init finsh */
	finsh_system_init();
	
#ifdef RT_USING_HOOK
	/* set idle thread hook */
	rt_thread_idle_sethook(RT_NULL);
#endif
	
	/* init idle thread */
	rt_thread_idle_init();
	
	/* start scheduler */
	rt_system_scheduler_start();
	
	/* never reach here */
	return ;

}

/*@}*/