On Thursday 16 June 2005 05:09, Rick Bronson wrote:
> Charles,
>
> Thanks much for the reply.
>
> > I'm notr sure what Uboot does, but it depends what you're trying to
> > achieve, reading or writing.
> >
> > If you're wanting to read an image during booting (ie. boot from YAFFS)
> > then have a look at the bootloader in YAFFS direct.
>
> Yes, this is what I want to do.
>
> Can the "YAFFS direct" take a pointer to the actual NAND device
> (ie. the 8 bit port) and extract a file from a partition into ram that
> was previously written via YAFFS on Linux?
The bootloader is really not part of Yaffs Direct, but just lurks in that
directory.
You still need to provide NAND read functions, but they don't have to be
Linux ones. yboot is LGPL to make it easier to integrate with various
bootloaders. I recommend too wandering over to the stuff Nick did to hook
this up with the Balloon project.
In essence, the bootloader (see direct/yboot.c) is a stripped version of the
yaffs mount scanner, but instead of searching for, and building up, all the
files it just looks for the file you want. As it is at present it has some
limitations (eg. can only boot from an image in the root).
>
> Unfortunately I'm stuck at a 2.4.19 kernel for now, is this a
> problem for the latest and greatest YAFFS?
All such problems should be in mtd land. YAFFS is pretty version agnostic. It
you have a working mtd then you should be good to go.
-- Charles
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