Flash File System

[Prakash kanthi]

Hi Jaap Jan,

Thanks for your reply. What do you mean by 'works out
of the box with denx'? I see the code you referred to
but not sure how to use it. I still have some
concerns. Like,

1. How can i initially store the image into flash? My
flash chip is on the board.
2. How can i boot linux from flash?

3. Currently i have a 32MB SDRAM along with flash. I
have tools to download linux image into SDRAM. Even if
i go with MTD/JFFS, my concern is unless linux runs
flash can not be accessed and vice versa.

4. Lets say, i download linux into a safe place in
SDRAM, boot it and then access flash thru MTD/JFFS and
store linux image into flash. Even in this case, what
all i need to take care of for making my flash a boot
device.

Any detailed documentation is appreciated.

Thanks,
Prakash




--- Jaap-Jan Boor <jjboor at lucent.com> wrote:
> Hi,
>
> I use strata flash with MTD and JFSS2 as file system
> on top of it. Works out of the box with denx' eldk
> kernel and
> toolchain. I've provided my own flash map but you
> can also use an existing one (look e.g. in
> linux/drivers/mtd/maps)
>
> Jaap-Jan
>
> Wolfgang Denk wrote:
> >
> > In message
> <20030326070131.88176.qmail at web41202.mail.yahoo.com>
> you wrote:
> > >
> > > I have a 32MB Intel Strata flash on my PPC405
> based
> > > custom board. I need to create access
> routines/APIs to
> > > access the flash. I was thinking of creating a
> Flash
> > > File System and mount it as a device in Linux
> > > environment.
> > >
> > > Are there any off the shelf FFS packages
> available?
> > > Generally, how the flash is used?
> >
> > Use the MTD layer.
> >
> > > I am working with micro-monitor to use its Tiny
> File
> > > System on flash support and eventually mount
> into
> > > linux. Did anyone use this combination before?
> >
> > I think you cannot do this. AFAIK the TFS code is
> not available under
> > a GPL compatible license which prevents it from
> being linked with the
> > Linux kernel code.
> >
> > Best regards,
> >
> > Wolfgang Denk
> >
> > --
> > Software Engineering:  Embedded and Realtime
> Systems,  Embedded Linux
> > Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88
>  Email: wd at denx.de
> > There is is no reason for any individual to have a
> computer in  their
> > home.      -- Ken Olsen (President of Digital
> Equipment Corporation),
> >               Convention of the World Future
> Society, in Boston, 1977
> >
>
> --
> J.G.J. Boor
> Room:  BE-525
> Lucent Technologies Nederland b.v.
> Phone: +31 35 687 4721
> Optical Networking Group TMS Data
> Fax:   +31 35 687 5976
> P.O. Box 1168, 1200 BD, Hilversum, The Netherlands
mailto:jjboor at lucent.com


** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/