rt-thread/bsp/mipssim/drivers/mipssim.h

#ifndef _MIPSSIM_H__
#define _MIPSSIM_H__

#include <mips.h>

#define ISA_MMIO_BASE   0x1fd00000

#define UART0_ISA_OFF   0x3f8
#define UART0_BASE KSEG1ADDR(ISA_MMIO_BASE + UART0_ISA_OFF)

void rt_hw_timer_handler(void);
void rt_hw_uart_init(void);

#endif