I recently bought a Jetson TK1 with the intent of learning all about ARM board bring up; essentially everything that happens between the reset vector and the spawning of the init process (in Linux). I've got a good understanding of this for x86, and I'd like to similarly understand what happens with an ARM SoC.
I've been having a rough go of it, for example I cannot even find in explicit terms what the reset vector address is. I began to think that maybe I'm presupposing too many x86 artifacts and that that's not at all how ARM works. x86 has a lot of cruft left over from the 70s, after all.
So I know that there is a u-boot port for the Jetson, so I cloned the source, started swimming through it, and quickly started to drown :)
So, my questions are these:
Can anyone briefly explain how the build system works, i.e. how the source is configured to build for Jetson, and how I find where u-boot's entry point is, so I can just look at what it does?
Thank you,
Don