[uClinux-dev] Minimum RAM for uClinux

Måns Brorsson mans.brorsson at gmail.com
Wed Oct 12 08:53:00 EDT 2005


I've used the HOWTO from the "NIOS uClinux project"
http://www.enseirb.fr/~kadionik/embedded/uclinux/HOWTO_compile_uClinux_for_NIOS.html
but i havent done it with my one cpu configuration. So if NIOS cant do XIP
what should i do then?

On 10/12/05, David McCullough <davidm at snapgear.com> wrote:
>
>
> Jivin M?ns Brorsson lays it down ...
> > I'm using a NIOS board with an APPEX20k. And i get loads of
> problems(errors)
> > when i validate the ide support. Dosen't uClinux 2.4 support the ide
> driver?
>
> It does, but you need to get the code support for your platform right
> first.
>
> I don't think NIOS can do XIP but I may be wrong. This could prevent
> you running in such a small amount of RAM.
>
> > Ok the FLASH first!
>
> It's usually a lot easier than IDE to get going :-)
>
> Cheers,
> Davidm
>
>
> > > Jivin M?ns Brorsson lays it down ...
> > > > I have a disk that i'am trying to connect to my board, haven't got
> the
> > > ide
> > > > controller to work yet. Then i have to write a boot strap and get it
> > > gooing
> > > > from the FLASH. Do you now wich bootloader i should use and wich
> > > parameters
> > > > to change so the kernel will be satisfied with my small RAM
> > >
> > > uboot seems to be doing fairly well lately. It may even support your
> > > platform already.
> > >
> > > Adding IDE drivers to your kernel will probably stop your config from
> > > working.
> > >
> > > You didn't say which CPU you are using ?
> > >
> > > I would get flash going first then IDE ;-)
> > >
> > > Cheers,
> > > Davidm
> > >
> > > > On 10/12/05, David McCullough <davidm at snapgear.com> wrote:
> > > > >
> > > > >
> > > > > Jivin M?ns Brorsson lays it down ...
> > > > > > I have 1Mb Flash and 256kb RAM
> > > > >
> > > > > If you run the kernel from flash, mount the FS from flash (XIP),
> > > > > configure the kernel without networking, only essential drivers
> > > > > and only the minimum filesystem (/bin/sh and little more), then
> you
> > > > > should be able to get something to boot, but it will be trickier
> > > > > than a normal bring up :-)
> > > > >
> > > > > Cheers,
> > > > > Davidm
>
> --
> David McCullough, davidm at cyberguard.com.au, Custom Embedded Solutions +
> Security
> Ph:+61 734352815 Fx:+61 738913630 http://www.uCdot.org
> http://www.cyberguard.com
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>



--
Måns Brorsson
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