modify boot environment parameters

modify boot environment parameters

[Saravanan Chanemouganandam]

Hi all,

Are there utilities to modify the boot environment (like u-boot) block on the 
flash from within the linux ?
I am looking for information to modify the boot environment block on the NOR 
(/dev/mtd0) flash at offset 0x5000. 

Thanks
Sara

Re: modify boot environment parameters

[Wolfgang Denk]

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

-- 
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd@denx.de
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Re: modify boot environment parameters

[Saravanan Chanemouganandam]

Hello Denk,

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

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

Is there any utility tool to access and modify a particular block 0x00050000 
on the NOR flash ? I came across u-boot/tools/env but its ment for u-boot. 
Will it give support to other flash env access with some modification ?

Thanks
Sara




Le Lundi 24 Septembre 2007 00:03, Wolfgang Denk a écrit :
> 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