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://openlab.rt-thread.com/license/LICENSE.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2006-10-25     Bernard      first implementation
 */

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

#include <pxa270.h>

char _undefined_stack_start[128];
char _abort_stack_start[128];
char _irq_stack_start[1024];
char _fiq_stack_start[1024];
char _svc_stack_start[4096] SECTION(".nobbs");

/**
 * @addtogroup PXA270
 */
/*@{*/

extern unsigned char __bss_start;
extern unsigned char __bss_end;

/* 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);

/**
 * @brief the startup entry of RT-Thread RTOS
 *
 * This function will startup RT-Thread RTOS
 */
void rtthread_startup()
{
	/* clear .bss */
	rt_hw_clear_bss();

	/* enable cpu cache */
	rt_hw_cpu_icache_enable();

	/* init hardware interrupt */
	rt_hw_interrupt_init();

	/* init board */
	// rt_hw_board_init();

	/* show rtt version information */
	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_page_init((void*)&__bss_end, (void*)0xa4000000);
#endif

	/* init scheduler system */
	rt_system_scheduler_init();

#ifdef RT_USING_HOOK
	/* set idle thread hook */
	rt_thread_idle_sethook(rt_hw_led_flash);
#endif

	/* init application */
	rt_application_init();

	/* init finsh */
#ifdef RT_USING_FINSH
	/* init the finsh input */
	rt_hw_finsh_init();

	/* init finsh */
	finsh_system_init();
#endif

	/* init idle thread */
	rt_thread_idle_init();

	// while (1) rt_hw_led_flash();

	/* start scheduler */
	rt_system_scheduler_start();

	/* never reach here */
	return ;
}

/*@}*/