text: #ifndef __SYSTEM_H__
  #define __SYSTEM_H__
  #include "utils.h"
  #include "uart.h"
  #include "uart_boot.h"
  #include "cpio.h"
  #include "dtb_parser.h"
  #include "mm.h"
  #include "irq.h"
  #include "vt.h"
  #include "timer.h"
  #include "sched.h"
  
  #define SYS_CMD_NUM 15
  
  void system_command(char*);
  
  void help();
  void hello();
  void reset(int tick);
  void cancel_reset();
  
  
  
  #endif
  