[coreboot] how to implement variable read/write variable in coreboot

[Peter Stuge]

Nico Huber wrote:
> In-flash variable format
> ========================
> 
> I like to keep things simple and assume that a key=value approach
> suffices (for this layer). Though, as we have certainly to deal with
> NOR flash chips (and their erase blocks), we can't just store things
> in a table that would require an erase cycle for every change of a
> variable. Here is a random proposal:

We already have a simple coreboot-native key-value store: CBFS

Yes, there is some overhead with every CBFS entry, but IIRC the
minimum alignment is 16 bytes.

Melissa, how many variables do you think are actually needed?


//Peter