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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2006-09-15 QiuYi the first version
* 2006-10-10 Bernard add hardware related of finsh
*/
#include <rthw.h>
#include <rtthread.h>
#include <bsp.h>
extern unsigned char __bss_start[];
extern unsigned char __bss_end[];
extern void rt_hw_console_init(void);
/**
* @addtogroup QEMU
*/
/*@{*/
static void rt_timer_handler(int vector, void* param)
{
rt_tick_increase();
}
#ifdef RT_USING_HOOK
static void idle_hook(void)
{
asm volatile("sti; hlt": : :"memory");
}
#endif
/* clear .bss */
void rt_hw_clear_bss(void)
{
unsigned char *dst;
dst = __bss_start;
while (dst < __bss_end)
*dst++ = 0;
}
/**
* This function will init QEMU
*
*/
void rt_hw_board_init(void)
{
/* clear .bss */
rt_hw_clear_bss();
/* init hardware interrupt */
rt_hw_interrupt_init();
/* init the console */
rt_hw_console_init();
rt_console_set_device("console");
/* initialize 8253 clock to interrupt 1000 times/sec */
outb(TIMER_MODE, TIMER_SEL0|TIMER_RATEGEN|TIMER_16BIT);
outb(IO_TIMER1, TIMER_DIV(RT_TICK_PER_SECOND) % 256);
outb(IO_TIMER1, TIMER_DIV(RT_TICK_PER_SECOND) / 256);
/* install interrupt handler */
rt_hw_interrupt_install(INTTIMER0, rt_timer_handler, RT_NULL, "tick");
rt_hw_interrupt_umask(INTTIMER0);
/* init memory system */
#ifdef RT_USING_HEAP
/* RAM 16M */
rt_system_heap_init((void *)&__bss_end, (void *)(1024UL*1024*8));
#endif
#ifdef RT_USING_HOOK
rt_thread_idle_sethook(idle_hook);
#endif
}
static int reboot(void)
{
outb(KBSTATP, 0xFE); /* pulse reset low */
return 0;
}
MSH_CMD_EXPORT(reboot, reboot system);
/*@}*/
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