How to get a device_t

Bernd Walter ticso at cicely12.cicely.de
Thu Aug 7 02:45:38 PDT 2003


On Wed, Aug 06, 2003 at 08:39:37PM -0600, M. Warner Losh wrote:
> In message: <20030807120707.C7321 at freebsd1.cimlogic.com.au>
>             John Birrell <jb at cimlogic.com.au> writes:
> : On Wed, Aug 06, 2003 at 07:45:32PM -0600, M. Warner Losh wrote:
> : The SC520 has onboard support to control 3 flash chips.
> : The board I have has 2 Mb NOR flash chip containing BIOS plus a DOS
> : file system (at the moment) where I keep a copy of an etherboot
> : executable. The board also has a 64Mb NAND flash chip which I've
> : written a FreeBSD UFS image into. Our standard bootloader happily
> : loads the kernel from that. Now I need to get a flash driver working
> : for the root file system. I've got an existing read-only flash driver
> : that I used to use on an Intel 386EX board, but that had the entire
> : flash chip memory mapped. This new board maps the NAND flash in 4K
> : pages.
> 
> That would be very very cool.  There's a number of new SBCs that I've
> seen that have this sort of setup.  Timing Solutions might be very
> interesting in something like this because we're currently buying CF
> cards to do our OS.

The soekris board seems to be designed to boot from soldered flash too.
At least there is PCB place under the CF socket that looks like flash
pads.

> : If you have time, I'd be interested. This is a hot topic for me because
> : it is exactly where I'm up to. I have everything else working on the
> : board.
> 
> I'm thinking that it wouldn't take too long.  Lemme see what I can
> throw together.  It would be a sketch only...

That would be great.

-- 
B.Walter                   BWCT                http://www.bwct.de
ticso at bwct.de                                  info at bwct.de



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