In message FD2AC9A020DDD51194710008C7089B20053D4C8E@dlee17.itg.ti.com you wrote:
Yes. I've read that and inspected many of the drivers and I've yet to find one which implements the whole specification, especially as it relates to validating the mac address. Is there a good example which you can point to?
See for example drivers/cs8900.c
The 91c111 can run with our with out an eeprom. Just because you have an eeprom there is no guarantee the mac is correct, just like there is nothing
If there is an EEPROM it has a checksum.
which say the user inputted it correctly. I recall working with some code
You cannot prevent against operator error.
a couple of the drivers do is a checksum over the eeprom this gives you some confidence but its not a validation.
It is IMHO not a task for a boot loader to validate user input on this level.
Its sort of picky to worry about it at this level, but it would be nice to find something good. I'll likely end up throwing in a simple check,
I may decide not to accept it because of inefficient memory footprint vs. benefits ration.
followed by setting the local address to what the env asked for or ... If none, what in the rom, if none, the default which is there already.
The code in drivers/cs8900.c is very simple (and small) and works pretty well for me.
Best regards,
Wolfgang Denk