Source code of kernel and u-boot for beagle bone bone

Hi Guys,

I have just purchased a beagle bone bone black (Rev C). Want to play around the linux kernel and device driver stuff.
Searching for the source code of kernel and u-boot.I tried out the below link but unable to clone kernel source code.

http://elinux.org/Beagleboard:BeagleBoneBlack_Rebuilding_Software_Image

Please help me out on this and let me know the correct path for fetching u-boot and kernel for BBB.

Regards,
Abhinav

https://github.com/beagleboard/linux

The kernel source git repo is documented in /etc/apt/sources.list

The main kernel sources are not in apt due to limited server space.

The u-boot source patch is listed under /opt/source/

both these are documented here:

https://eewiki.net/display/linuxonarm/BeagleBone+Black

Regards,