startup.c.svn-base

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
 *                Triseel
 */
#include <rtthread.h>
#include <rthw.h>

#include <AT9200.h>
#include <board.h>
#include <serial.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");

extern void rt_hw_interrupt_init(void);
extern void rt_hw_board_init(void);
#if 0
extern void rt_serial_init(void);
#else  /*changed by Triseel, for multi UART port use*/
extern void rt_serial_init(UARTPort_T *pargUARTPort);
#endif
extern void rt_system_timer_init(void);
extern void rt_system_scheduler_init(void);
extern void rt_system_page_init(void* begin_addr, void* end_addr);
extern void rt_thread_idle_init(void);
extern void rt_hw_cpu_icache_enable(void);
extern void rt_show_version(void);

/**
 * @addtogroup at9200
 */

/*@{*/
#ifdef __CC_ARM
extern unsigned char* __bss_start;
extern unsigned char* __bss_end;
#else
extern unsigned char __bss_start;
extern unsigned char __bss_end;
extern unsigned char __text_end;
#endif

/* clear .bss */
void rt_hw_clear_bss(void)
{
	unsigned int *dst;

#ifdef __CC_ARM
	dst = (unsigned int*)__bss_start; 
	while (dst < (unsigned int*)__bss_end) *dst++ = 0;
#else
	dst = (unsigned int*)&__bss_start; 
	while (dst < (unsigned int*)&__bss_end) *dst++ = 0;
#endif
}

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

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

	/* enable cpu cache */
	rt_hw_cpu_icache_enable();
	rt_hw_cpu_dcache_enable();

	/* init hardware interrupt */
	rt_hw_interrupt_init();

	/* init board timer as OS timer tick*/
	rt_hw_board_init();
	

	/*partly finished*/
	/* init hardware serial */
	UARTPort_T UARTDbgPort;
	memset(&UARTDbgPort, 0, sizeof(UARTDbgPort));
	UARTDbgPort.Port=UART_DBG;
	UARTDbgPort.bInited =0;
	UARTDbgPort.DataBits=DataBits_8;
	UARTDbgPort.Parity  =Parity_None;
	UARTDbgPort.StopBits=StopBits_1;
	UARTDbgPort.BaudRate=115200;
	rt_serial_init(&UARTDbgPort);

	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
#ifdef __CC_ARM
	rt_system_page_init((void*)__bss_end, 0x1000000);
#else
	rt_system_page_init((void*)&__bss_end, (void*)0x1000000);
#endif
#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

	/*only unmask this int currently*/
	rt_hw_interrupt_umask(SYS_VEC);
	
	/* init idle thread */
	rt_thread_idle_init();

	/* start scheduler */
	rt_system_scheduler_start();

	return ;
}

/*@}*/