[U-Boot-Users] ether mac auto override.
wd at denx.de
Wed Jun 18 21:06:49 CEST 2003
In message <FD2AC9A020DDD51194710008C7089B20053D4C8E at 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
> 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.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
This cultural mystique surrounding the biological function -- you
realize humans are overly preoccupied with the subject.
-- Kelinda the Kelvan, "By Any Other Name", stardate 4658.9
More information about the U-Boot