From mboxrd@z Thu Jan  1 00:00:00 1970
From: Scott Wood <scottwood@freescale.com>
Date: Tue, 4 Dec 2012 10:26:54 -0600
Subject: [U-Boot] access u-boot environment variables from kernel space
In-Reply-To: <CAGm1_kuScPNR-cg_dMVqctxmmchQjHUCY15Pj2Q5B+1rQT_gCA@mail.gmail.com>
	(from yegorslists@googlemail.com on Tue Dec  4 07:24:51 2012)
References: <1349371267.15830.4@snotra> <1354622692.2569.82.camel@Manukumar>
	<CAGm1_kuScPNR-cg_dMVqctxmmchQjHUCY15Pj2Q5B+1rQT_gCA@mail.gmail.com>
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On 12/04/2012 07:24:51 AM, Yegor Yefremov wrote:
> On Tue, Dec 4, 2012 at 1:04 PM, Manukumar  
> <manukumar@signal-networks.com> wrote:
> > Dear All,
> >
> > How to access u-boot environment variables from kernel space or user
> > space in P1012 processor.
> >
> > The variables required to be accessed from uboot environment section
> > are:
> >
> > eth1addr
> 
> You can get the MAC address from related registers of your Ethernet
> controller, provided they where set by u-boot. This is way the network
> driver goes.

No, you get that from the device tree.  You cannot rely on U-Boot to  
have initialized the network hardware, or on the network hardware to  
not have been reset since then.

-Scott