+ "usbboot=usb reset; " \
+ "if usb storage; then " \
+ "echo USB drive found;" \
+ "if run usbloadbootenv; then " \
+ "echo Loaded environment from ${bootenv};" \
+ "run usbimportbootenv;" \
+ "fi;" \
+ "if test -n $uenvcmd; then " \
+ "echo Running uenvcmd ...;" \
+ "run uenvcmd;" \
+ "fi;" \
+ "if run usbloadimage; then " \
+ "run usbloados;" \
+ "fi;" \
+ "fi;\0" \