Re: Interest in DOC and YAFFS? --> YAFFS bootloading

Nick Bane
2002-09-24T07:21:59Z

The modifications I made to bootldr (CRL bootloader as used in iPaq
handhelds) were trivial after mkysffsimage was fixed (ask for a copy as the
CVS one is still badly broken).

Bootldr copies the data 512+16 bytes at a time into non-broken NAND. The
kernel is then booted with prior knowledge as to where to find the YAFFS
data and all is ok.

How this works with DOC I am unclear as I had noticed a while back that
there was hardware assisted ECC. This might get in the way of YAFFS ECC but
maybe this can be circumvented.

Nick Bane

----- Original Message -----
From: "Charles Manning" <manningc2@actrix.gen.nz>
To: "Marc Singer" <elf@buici.com>
Cc: <linux-mtd@lists.infradead.org>; <yaffs@toby-churchill.org>
Sent: Tuesday, September 24, 2002 4:58 AM
Subject: Re: Interest in DOC and YAFFS? --> YAFFS bootloading

> On Tue, 24 Sep 2002 15:44, Marc Singer wrote:
> > On Tue, Sep 24, 2002 at 12:03:45PM +1200, Charles Manning wrote:
> > > Hi
> > >
> > > I'm considering getting YAFFS working on DOC. I'm trying to gauge
> > > interest to prioritise vs other things.
> > >
> > > If you don't know what YAFFS is, it's a NAND-specific journalling
> > > file system. Ask Google for more info.
> > >
> > > Currently YAFFS works with raw NAND (using software ecc), though
> > > some people have patched it to use hardware ecc, so I figure DOC
> > > support should be relatively simple.
> >
> > Do you know how it boots? Does grub support it?
>
> By "it" I assume you mean YAFFS.
>
> Doing a yaffs-specific bootloader is pretty simple. We have discussed the
> general approach on the YAFFS list before. At least two people have done
> yaffs bootloaders. One of these might be rolled in with grub. Maybe
someone
> else on the yaffs list can answer that.
>
>
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