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List:       uclinux-dev
Subject:    Re: [uClinux-dev] not compressed uClinux: xip?
From:       Fabio Giovagnini <fabio.giovagnini () aurion-tech ! com>
Date:       2005-04-29 9:57:13
Message-ID: 200504291157.14284.fabio.giovagnini () aurion-tech ! com
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It is the Execution in place feature;
in few word it is a kernel configuration so that you can execute the kernel 
directly from the rom support (flash mamery on the bus) without uncompress 
the kernel code in ram.

Best regard

Alle 11:09, venerdì 29 aprile 2005, David david ha scritto:
> hello,
> what is XIP?
> thanks
>
> --- "Friedrich, Lars" <lars.friedrich@wago.com> wrote:
> > > i want to know if i can not compress uclinux
> >
> > Sure.
> >
> > > and starts it on my flash (2Mo)?
> >
> > If the uncompressed image fits onto the flash
> > and supports XIP, yes.
> >
> > > how do i make?
> >
> > Don't compress it and compile it as XIP kernel
> > image.
> >
> > > My compressed uClinux version (1,6 Mo) is in my
> >
> > flash
> >
> > > memory, it is uncompressed in RAM then what is
> >
> > happen
> >
> > > it start in RAM or in Flash
> >
> > Yes. RAM or Flash. Or ROM. Or any other device that
> > happens
> > to be on the memory bus with the target address.
> >
> > > because my bootloader tells
> > >
> > > Image Type:   ARM Linux Kernel Image (gzip
> >
> > compressed)
> >
> > >    Data Size:    1715587 Bytes = 1675 kB = 1 MB
> > >    Load Address: 80020000
> > >    Entry Point:  00040000
> > >    Verifying Checksum ... OK
> > >    Uncompressing Kernel Image ... OK------RAM
> > > No initrd
> > > ## Transferring control to Linux (at address
> > > 00040000)--------flash ...
> > >
> > > Starting kernel ...
> >
> > I don't see a problem. The bootloader jumps to
> > the entry point as specified.
> >
> > Best regards,
> > Lars Friedrich
> > _______________________________________________
> > uClinux-dev mailing list
> > uClinux-dev@uclinux.org
>
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>
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>
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-- 
Fabio Giovagnini
Aurion s.r.l.

www.aurion-tech.com
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