-----Messaggio originale----- Da: u-boot-users-admin@lists.sourceforge.net [mailto:u-boot-users-admin@lists.sourceforge.net]Per conto di Getz, Robin Inviato: giovedi, 26. agosto 2004 10:30 A: U-Boot-Users@lists.sourceforge.net Oggetto: [U-Boot-Users] MAC address question...
I have a board with a SMC91111 on it, with an EEPROM connected to it, to store the MAC address. This allows users of the board to re-flash the main flash with U-boot as many times as they want without worrying about managing the MAC address in the main flash.
You can use 'ethaddr' env. variable. By keeping the environment variables in a separate flash sector you can re-flash the U-Boot sectors without worries. That's actually what I do on our board, which doesn't have an EEPROM connected to the LAN91C111.
However, changing the EEPROM MAC address is troublesome, because the /drivers/smc91111.c doesn't seem to support programming the attached EEPROM. (you can get_rom_mac, but not set_rom_mac).
Before I started adding things, does anyone else have the same issue?
What I was thinking of doing was defining some reserved memory locations of the processor as FLASH, and handle this in /board/specific/flash.c - a flash write to 6 memory locations will actually set the MAC address in the EEPROM attached to the LAN91111.
...wouldn't be better to implement a set_rom_mac() ?
This solution is OK - it only effects my board, the downside is that if this is a problem other face, it doesn't help anyone else.
Thoughts?
Thanks -Robin
Regards, -Paolo Broggini
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