If U-Boot is already installed and running on your board, you can
use these instructions to download another U-Boot image to replace
the current one.

Warning: Before you can install the new image, you have to erase the
current one. If anything goes wrong your board will be dead. It is
strongly recommended that you make sure that:
- you have a backup of the old, working image
- you know how to install an image on a virgin system

Proceed as follows:
Note: Included topic
DULGData.canyonlandsInstallUBootUsingUBoot? does not exist yet