tree 93304ea7a4abea3187b6035427b7176d837868c1
parent 54a82d076ff0d2eee2d50df9921ee98b0439a1fe
author Daniel Mentz <danielmentz@google.com> 1409090995 -0700
committer Daniel Mentz <danielmentz@google.com> 1409160862 -0700

uloader: Try backup bootloader if primary corrupt

We store two copies of the bootloader in the NOR flash. Previously, the
uloader would only attempt to load the primary copy in the loader0
partition. Let's change the uloader in a way such that it falls back to
the secondary copy in the loader1 partition if it can't verify the
primary copy. While we're at it, let's also make multiple attempts to
download the booloader over UART if we're booting from the same.

Change-Id: I75cf63c028d098b38e708240158bc14b64382287