From: "Chuck Partridge" <Chuck_Partridge@amx.com>
To: <Michael@KSWaves.com>, <Jan.Rovins@radisys.com>
Cc: <linuxppc-embedded@lists.linuxppc.org>
Subject: Re: AMD Flash Interface for updating boot flash
Date: Wed, 26 Jun 2002 15:23:19 -0500 [thread overview]
Message-ID: <sd19dc75.088@mx.amx.com> (raw)
Where do you set this up? If I want to use partitions, where do I put the info on how it is partitioned?
I modified the kernel .config and it gives me the following startup messages:
physmap flash device: 80000 at fff00000
CFI: Found no Physically mapped flash device at location zero
I'll check out the MTD list.
Chuck
>>> <Jan.Rovins@radisys.com> 06/26/02 02:49PM >>>
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" <Michael@KSWaves.com>
Sent by: owner-linuxppc-embedded@lists.linuxppc.org
06/26/2002 12:17 PM
To: "Chuck Partridge" <Chuck_Partridge@amx.com>,
<linuxppc-embedded@lists.linuxppc.org>
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" <Chuck_Partridge@amx.com>
To: <linuxppc-embedded@lists.linuxppc.org>
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/
next reply other threads:[~2002-06-26 20:23 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-06-26 20:23 Chuck Partridge [this message]
2002-06-26 21:02 ` AMD Flash Interface for updating boot flash Wolfgang Grandegger
-- strict thread matches above, loose matches on Subject: below --
2002-06-26 23:00 Jan.Rovins
2002-06-26 19:49 Jan.Rovins
2002-06-26 15:09 Chuck Partridge
2002-06-26 16:17 ` Michael Meriin
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