I agree that MTD is the way to go, but with one small change to Michael's
instructions.
configure MTD for char driver support, and do
dd if=bootloader of=/dev/mtd0
/dev/mtd0 is a raw char device that is best to write a binary boot image
to flash,
/dev/mtdblock0 is a block device that is best for file system images,
which can then be mounted.
You can get expert advice from the MTD list:
http://lists.infradead.org/mailman/listinfo/linux-mtd/
Jan
"Michael Meriin" [off-list ref]
Sent by: owner-linuxppc-embedded@lists.linuxppc.org
06/26/2002 12:17 PM
To: "Chuck Partridge" [off-list ref],
[off-list ref]
cc:
Subject: Re: AMD Flash Interface for updating boot flash
Just define your flash as a MTD device and then, from user space use dd
command to copy your bootloader to flash:
dd if=bootloader of=/dev/mtdblock0
Best Regards,
Michael Meriin
----- Original Message -----
From: "Chuck Partridge" <redacted>
To: <redacted>
Sent: Wednesday, June 26, 2002 17:09
Subject: AMD Flash Interface for updating boot flash
Hello all,
I have been searching the archives and I am a bit confused, so bear with
me if this is too simple a question.
I need to provide a way to update my boot flash from user space.
Our user application will download an boot flash image and save it (to a
file or a buffer), we must then write the flash.
I have seen references in the archives to Denx's
drivers/char/amd_flash.c
and to MTD drivers, or I can
implement my own driver, but I'm not sure of the best (i.e. easiest and
cleanest) way.
I don't need to put a file system on the flash. All it does is hold the
PPCBoot image. The flash part is an AMD
29LV004B and is setup for 8 bit interface. I am running a 2.4.17 kernel
on an 8245.
Any suggestions?
Thanks,
Chuck
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/