Hello

I am trying to enable NVRAM for MainnoMax for the 4.11 branch.

I am trying to save persistence config in SOC E3825. (It has a MC146818B-compatible 242 bytes of battery-backed RAM).

I enabled the following options in coreboot 4.11 branch:

Use CMOS for configuration values
Load default config values on each boot

And tested whether the configuration made by nvramcui (as my second mayload) is persistent across power-offs with no luck.

I have the following questions and I would appreciate it if anyone can answer any of these questions:

1.How to enable coreboot to save configuration on MinnowMAX?

2.With the battery connected to the board, is it correct to use nvramcui to check persistent configuration?

3. I read about SMMSTORE as a way to store configuration changes in BIOS without having an actual EEPROM storage but I don't know if I have to enable it explicitly if my board doesn't support it.

4. How one can add SMMSTORE support for SoCs like Intel E3800 families.

Also I would be grateful if anyone can send me links to investigate any further.