[U-Boot-Users] Ethernet does not work on at91rm9200
p.koegler at el-me.de
Tue Jul 6 11:04:57 CEST 2004
There is an interesting thread about initializing the mac adress:
D-84072 Au i. d. Hallertau
Tel.: +49 / 8752 / 864 - 527
Fax.: +49 / 8752 / 864 - 100
mailto.: p.koegler at el-me.de
From: Wolfgang Denk [mailto:wd at denx.de]
Sent: Monday, July 05, 2004 7:47 PM
To: Kögler Peter
Cc: u-boot-users at lists.sourceforge.net
Subject: Re: [U-Boot-Users] Ethernet does not work on at91rm9200
In message <367ED8C46538D7119DAC000A0D106744520D54 at elmegmbh.elmedmn.com> you
> but if i boot from filesystem (jffs2) than linux doesnt know the
> if i stop at u-boot prompt, call any network function, and start linux
> afterwords, then linux knows the mac-adress.
This is a problem with your LInux driver which does not perform all
the required initialization.
This tends to become a FAQ.
> does u-boot only initialize the ethernet interface if it is needed? can i
> force u-boot to init the ethernet interface or is there another 'standard'
> way to tell linux the mac-adress?
U-Boot should NOT touch any hardware it does not access itself. If
you don't use the ethernet interface in U-Boot it shall NOT be
initialized by U-Boot.
The standard way is that the Linux driver is responsible to perform
all required initialization. The method to pass information from the
boot loader to the Linux kernel is architecture dependent; it may use
a bd_info structure (like on PPC), or ATAGs (like on ARM) or command
line arguments, or a combination of these.
Software Engineering: Embedded and Realtime Systems, Embedded Linux
Phone: (+49)-8142-4596-87 Fax: (+49)-8142-4596-88 Email: wd at denx.de
I have made mistakes, but have never made the mistake of claiming I
never made one. - James G. Bennet
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