set default=0 set timeout=1 set console_uart="CONSOLE_UART" menuentry 'Debian GNU/Linux (eMMC)' { linux /boot/KERNEL console=tty0 console=${console_uart} root=/dev/disk/by-label/rootfs rootwait rw efi=noruntime initrd /boot/INITRD devicetree /boot/dtbs/DEVICE_TREE } menuentry 'Fastboot' { search.fs_label boot boot_part chainloader ($boot_part)/EFI/BOOT/fastboot.efi }