[coreboot] How to switch the coreboot-v2 from the ROMCC mode to CAR/gcc mode?

Hi all,

I think alI need to do is to edit one of the config.lb, and adapt the
cache_as_ram..inc.

Is that right?

But which config.lb and what need to be changed in it?

(My CAR code now can work under EFI, but I want to migrate it into
coreboot)

I didn't found the information I need on the www.coreboot.org/document
and this maillist.

So any comment are welcome, I am a newbie.