[U-Boot] A command to discard saved environments?

[Masahiro Yamada]

Hi.


I am looking for a command
that discards the saved environments,
and takes me back to the
"*** Warning - bad CRC, using default environment" state.


In my case, the environment data is saved
at sector 0x400 of the MMC device on my board.


So, I can just do

 > mmc erase 400 10


But, beforehand, I need to know

CONFIG_ENV_IS_IN_MMC
CONFIG_ENV_OFFSET     0x80000

in order to confirm if the above command is doing the right thing.
(If I make a mistake in calculating the offset value,
other data would be damaged.)



Is there a nice command to do that?



-- 
Best Regards
Masahiro Yamada