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Re: [microblaze-uclinux] uCLinux VS Linux
Brett,
I am using the Avnet FX12 board. It's the same part,
but the ml403 has a lot more peripherals.
--- mcnernbm@notes.udayton.edu wrote:
> Greg,
> Which V4 board are you working with? I jsut
> received a ml403 board from
> xilinx today it contains a V4 FX12 chip on it with a
> ppc. My goal is to
> get the linux up and running on it as soon as
> possible.
> Brett
>
>
>
>
> Greg Miller <apco25@yahoo.com>
> Sent by: owner-microblaze-uclinux@itee.uq.edu.au
> 06/07/2005 08:23 AM
> Please respond to
> microblaze-uclinux@itee.uq.edu.au
>
>
> To
> microblaze-uclinux@itee.uq.edu.au
> cc
>
> Subject
> [microblaze-uclinux] uCLinux VS Linux
>
>
>
>
>
>
> All,
>
> here is a message that I sent to John. Since he said
> people may be
> interested in this, I am forwarding to this group.
> Feel free to chime in
> anyone. I know this has been discussed here before
> as well.
>
> John, to answer your question below I am using
> open-source distribution
> 2.4.30-pre1 from the MV website. (It is not the
> supported version
> however).
> I used Crosstool to build the ppc cross compiler.
>
> Here is what I want to do:
> 1). mount a drive on ddr like uCLinux does (i.e. not
> have to use nfs or
> the ACE).
> 2). Build in Busybox like uCLinux
> 3). build a .bit file like uCLinux (not .elf)
> 4). Get MTD to work with flash.
>
> Basically, I want it to be very similar to uCLinux
> except for the running
> on the PPC in V4 not on MB.
>
> John says below maybe just compile uCLinux for PPC.
> John, what did you do
> to get that to work? I could try it.
>
> Thanks.
>
> John Williams <jwilliams@itee.uq.edu.au> wrote:
> Date: Tue, 07 Jun 2005 14:46:34 +1000
> From: John Williams <jwilliams@itee.uq.edu.au>
> To: Greg Miller <apco25@yahoo.com>
> Subject: Re: uCLinux VS Linux
>
> Hi Greg,
>
> Greg Miller wrote:
>
> > I wanted to ask this of you off line since it's
> more of a Linux question
>
> > than uCLinux. I am compiling Linux for the PPC and
> I want to have the
> > root filesystem reside in DDR just like uCLinux
> does. Linux seems to
> > offer NFS and file systems on the SYS ACE. I think
> you did this or know
> > about it for uCLinux VS Linux and was wondering if
> you can give me some
> > history/guidence on this subject.
>
> Which Linux distribution are you using for your PPC
> work? MontaVista,
> or Denx' ELDK, ???
>
> I've experimented with building PPC kernels from
> within the
> uClinux-dist, so it uses exactly the same build
> processes! as a typical
> uClinux build. However at that time I had no
> hardware to test it on, so
> didn't get much further than that.
>
> However, I suspect that it will only be a little bit
> of work to do what
> you are attempting.
>
> > I don't need details (unless you want to give them
> to me) because I know
>
> > you are busy. However, I am not afraid to read, so
> if you have
> > informational links that would be great.
>
> Hmm, don't know any links off the top of my head.
> Essentially you need
> to look at how the PPC kernel handles mounting the
> root filesystem, then
> map that across to use the ROMFS/CRAMFS mechanism
> used in uClinux-land.
>
> Here's a couple of articles that talks about how
> it's done in uClinux:
>
>
http://www.ucdot.org/article.pl?sid=03/01/11/1049210&mode=thread
>
>
http://www.ucdot.org/archive/deep/deeply-embedded-linux.html
> (maybe)
>
> On the PPC side, I don't have anything of value -
> jsut use the source
> and of cou! rse google! :)
>
> > One other thing is how it was done to create a
> .bit file from the
> > .elf... Similar issue does not seem to be offered
> in the Linux release
> > (directly).
>
> Again, not sure which linux release you are refering
> to. You can get
> the latest MontaVista PPC tree from
> www.penguinppc.org - but I am not
> sure of their approach.
>
> Convergence between the mb-uclinuxc and PPC-linux is
> on my roadmap, but
> we aren't expecting any signficant results for a few
> months yet, so you
> probably don't want to wait. Am happy to discuss the
> subject with you
> if you wish.
>
> Also, feel free to raise these issues on the
> mb-uclinux list - the
> mb/ppc crossover is probably of wider interest than
> you might think...
>
> Cheers,
>
> John
>
>
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