fel-boot.bin is a FEL bootstrap program. fel write 0x2000 fel-boot.bin fel exe 0x2000 fel write 0x4a000000 u-boot.bin fel exe 0x4a000000 optionally load kernel + initramfs before fel exe of u-boot fel write 0x2000 fel-boot.bin fel exe 0x2000 fel write 0x4a000000 u-boot.bin fel write 0x43000000 ../script.bin fel write 0x44000000 ../uImage fel write 0x4c000000 ../initramfs.img fel exe 0x4a000000 Build instructions: 0. You need to build u-boot sunxi-current SPL first for the your board. 1. Specify needed configuration when when running make BOARD= boardname CROSS_COMPILE= compiler prefix UBOOT= u-boot sources UBOOTOBJ= u-boot built tree make BOARD=cubieboard CROSS_COMPILE=arm-linux-gnueabihf- UBOOT=~/SRC/u-boot/ UBOOTOBJ=~/SRC/u-boot/build/'$(BOARD)'/ Other options NO_PRINTF=1 Disable printf, reducing the code size a bit Defaults: # Target board name. This should match the dram_<boardname>.c in # u-boot/board/sunxi/ BOARD=eoma68 # Path to your tool chain CROSS_COMPILE=ikk/toolchains/arm-linux-gnueabihf/bin/arm-linux-gnueabihf- # U-boot main source path UBOOT=/home/henrik/SRC/u-boot/ # U-boot object path (O=... when building u-boot). UBOOTOBJ=$(UBOOT)build/$(BOARD)/