Hi u-boot,
I see u-boot supports readonly serial# and ethaddr, but I have a few other variables that I need to be read-only. I'm planning to implement a generic list of variables that cannot be changed or deleted.
I'm interested to know what sort of specification people would find most appropriate. My current thought is to follow the same delimiter as the env itself, i.e. null separated list with double null terminator. This list would then be defined in the board config header. It also seems that you should be able to specify simple access rules for each variable name perhaps using "=<val>" after each var name where <val> could have constants (probably numbers for performance, but could be string literals) to define modes. Right now I'm thinking read-only, create-only, change-default, and change-only (i.e no delete) are the modes that make sense.
I'm also interested if anyone would be opposed to simply using this new specification of readonly vars to implement the serial# and ethaddr protection. The CONFIG_HAS_UID is a bit odd... should that be available in general for read-only vars?
Comments?
Thanks, -Joe