[coreboot] Failover and Fallback

[Harald Gutmann]

Hello,

I know how the coreboot image is scaled with Failover/Fallback/Normal.
http://www.coreboot.org/Anatomy_of_a_Failover_coreboot_v2_Image

But my question is when does coreboot access Failover or Fallback?
I wasn't able to determine that, but it would be good to know.

Kind regards,
Harald