76 lines
1.4 KiB
C
76 lines
1.4 KiB
C
/*
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* File : board.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.fayfayspace.org/license/LICENSE.
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*
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* Change Logs:
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* Date Author Notes
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* 2006-09-15 QiuYi the first version
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* 2006-10-10 Bernard add hardware related of finsh
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*/
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#include <rtthread.h>
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#include <rthw.h>
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#include <bsp.h>
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/**
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* @addtogroup QEMU
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*/
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/*@{*/
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static void rt_timer_handler(int vector)
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{
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rt_tick_increase();
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}
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#ifdef RT_USING_HOOK
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static void idle_hook(void)
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{
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asm volatile("sti; hlt": : :"memory");
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}
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#endif
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/**
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* This function will init QEMU
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*
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*/
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void rt_hw_board_init(void)
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{
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/* initialize 8253 clock to interrupt 1000 times/sec */
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outb(TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT);
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outb(IO_TIMER1, TIMER_DIV(RT_TICK_PER_SECOND) % 256);
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outb(IO_TIMER1, TIMER_DIV(RT_TICK_PER_SECOND) / 256);
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/* install interrupt handler */
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rt_hw_interrupt_install(INTTIMER0, rt_timer_handler, RT_NULL);
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rt_hw_interrupt_umask(INTTIMER0);
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#ifdef RT_USING_HOOK
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rt_thread_idle_sethook(idle_hook);
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#endif
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}
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void restart(void)
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{
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outb(KBSTATP, 0xFE); /* pulse reset low */
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while(1);
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}
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#ifdef RT_USING_FINSH
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#include <finsh.h>
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FINSH_FUNCTION_EXPORT(restart, reboot PC)
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void reboot(void)
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{
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restart();
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}
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FINSH_FUNCTION_EXPORT(reboot, reboot PC)
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#endif
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/*@}*/
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