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From: Saravanan Chanemouganandam <schane@osmozis.com>
To: linux-mtd@lists.infradead.org
Subject: Re: modify boot environment parameters
Date: Mon, 24 Sep 2007 09:28:07 +0200
References: <20070923220352.8B3322405D@gemini.denx.de>
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Hello Denk,

I am using proprietary (ARMmon) binary version of bootloader (like u-boot a=
nd=20
not u-boot bootloader) that gives support to modify environment variables=20
only from the bootloader prompt. But, In my case, I want to modify boot=20
environment option
"root=3D/dev/mtdblock1" to "root=3D/dev/mtdblock2" and viceversa on success=
ive=20
reboot.

The environment variables are stored at the offset 0x00050000  ( 4th block)=
 on=20
the NOR flash (/dev/mtdblock0).

Is there any utility tool to access and modify a particular block 0x0005000=
0=20
on the NOR flash ? I came across u-boot/tools/env but its ment for u-boot.=
=20
Will it give support to other flash env access with some modification ?

Thanks
Sara




Le Lundi 24 Septembre 2007 00:03, Wolfgang Denk a =E9crit=A0:
> In message <200709191804.24336.schane@osmozis.com> you wrote:
> > Are there utilities to modify the boot environment (like u-boot) block =
on
> > the flash from within the linux ?
>
> Of course there are. But this is off topic here.
>
> > I am looking for information to modify the boot environment block on the
> > NOR (/dev/mtd0) flash at offset 0x5000.
>
> See u-boot/tools/env/
>
> Best regards,
>
> Wolfgang Denk