#define ACFG_CONSOLE_DEV ttymxc0
#define CONFIG_SYS_AUTOLOAD "no"
#define CONFIG_ROOTPATH "/tftpboot/" __stringify(CONFIG_BOARD_NAME) "-root"
+#define CONFIG_USE_PREBOOT
#define CONFIG_PREBOOT "run check_env"
#define CONFIG_BOOTCOMMAND "run emmcboot"