[L] Change in coreboot[main]: Introduce a coreboot Control Block (CCB)

[Felix Held (Code Review)]

Attention is currently required from: Arthur Heymans, Julius Werner, Jérémy Compostella, Karthik Ramasubramanian, Paul Menzel, Simon Glass, Simon Glass.

Felix Held has posted comments on this change by Simon Glass. ( https://review.coreboot.org/c/coreboot/+/77712?usp=email )

Change subject: Introduce a coreboot Control Block (CCB)
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Patch Set 10:

(1 comment)

Patchset:

PS10:
> We did discuss the various configuration mechanisms available... […]

when using fmap, you'll have the start and size of all sections as defines in a generated header file, so those are a fixed locations. with using this you have the ease of use of a fixed flash offset in the code and not need to walk some data structure while using already existing and proven coreboot infrastructure instead of adding some hack.
have a look at build/fmap_config.h after running a build; i'm rather sure that that should exactly provide what you need. only thing to make sure is that the corresponding fmap partition is inside of the part of the flash that gets mmio-mapped without much additional setup.
when there's some infrastructure that can easily do what's needed, i'm rather strongly opposed to reinventing the wheel