ARM article on U-Boot

A few weeks ago Linus Walleij of Linaro wrote an article talking about boot loader technology options for AArch32 and AArch64. Besides going into detail on U-Boot,  the blog mentions some boot loaders from Qualcomm and elsewhere:

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