[U-Boot-Users] dual boot by modifying u-boot environment variables from linux/vxWorks

[Ben Warren]

AFAIK, you can only mount block devices, which /dev/mtd is not.  You
don't need to mount anything, though, to use the fw* utilities, since
they operate on the character devices /dev/mtd*.  You just need MTD
support in your kernel.  Make sure you have the right information about
your environment sectors in /etc/fw_env.config, and you should be good
to go.

For more clarity, you should RTFFAQ, where there's a section called
something like "How can I access environment variables from Linux"

cheers,
Ben

On Fri, 2006-07-14 at 13:44 -0700, Robert Steele wrote:

> I'm at the point in this problem with I am trying to mount /dev/mtd
> 
> I'm wondering if anyone has a fstab file that they could share with me that 
> might help me get the flash device mounted.
> 
> Rob Steele
> 
> 
> At 04:31 PM 07/11/2006, you wrote:
> >In message <6.1.1.1.2.20060711160541.01e6e740 at mail.jpl.nasa.gov> you wrote:
> > > I want to be able to 'dual' boot my system, a Gespac PCIPPC-2 (power pc),
> > > by the using the method of modifying the u-boot environment variables from
> > > either vxWorks or Linux. This way if I boot up in the 'wrong' system I can
> > > change the boot parameters and reboot. It looks like the fw* utilities
> > > require /dev/mtd0 and /dev/mtd1 to reference the flash memory and this 
> > does
> > > not appear to be set up in my kernel. Does this require a re-build of my
> > > kernel or are there other less dramatic options available. If anyone can
> >
> >Yes, if the kernel is not configured to include MTD support then  you
> >will   have  to  reconfigure  it  and  build  it  (or  at  least  the
> >corresponding  modules).  But  that's   a   trivial   task,   nothing
> >"dramatic".
> >
> >
> >Best regards,
> >
> >Wolfgang Denk
> 
> 
> 
> 
> 
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