Boot loaders

http://www.linaro.org/blog/core-dump/u-boot-on-arm32-aarch64-and-beyond/

https://github.com/linaro-swg/u-boot/tree/master/board/freescale/ls1043ardb
https://github.com/linaro-swg/u-boot

Controlling Booting in AARCH32 or AArch64.

4.3.76 Reset Management Register

Environment setup and U-Boot compile

http://developer.toradex.com/knowledge-base/build-u-boot-and-linux-kernel-from-source-code