main.c

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/* We come here after U-Boot is initialised and ready to process commands */
void main_loop(void)
{
  const char *s;
  bootstage_mark_name(BOOTSTAGE_ID_MAIN_LOOP, "main_loop");

  cli_init();
  s = bootdelay_process();   //获取启动延迟时间 

  //从FDT中获取命令行参数
  if (cli_process_fdt(&s))
​    //设置了bootsecure执行;
​    //不使用命令行,避免被攻击
​    cli_secure_boot_cmd(s);

  //自动启动命令
  autoboot_command(s);
  //命令行循环
  cli_loop();
  panic("No CLI available");
}