From: Dan Malek <dan@netx4.com>
To: "Brown, David (dbrown03)" <DBrown03@harris.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: Questions about 8xxrom
Date: Fri, 26 May 2000 12:11:19 -0400 [thread overview]
Message-ID: <392EA227.41945656@embeddededge.com> (raw)
In-Reply-To: BE1C564723B3D21191FD0000F840E39801D81549@rfcmx2.rfc.comm.harris.com
"Brown, David (dbrown03)" wrote:
>
> Now, I've gone back to try the ELF method. My flash starts at FF800000, and
> the zImage.initrd is stored at the beginning of flash.
As I have said many times, and as recently as yesterday, the zImage
(especially with initrd) was never intended to be a proper ELF image.
It is the most compressed set of bits possible to minimize storage
in a device. The ELF header is an artifact of the tools used to create
zImage, and should simply be stripped. The zImage is a "self extracting"
image that is loaded into ram or flash rom. When you are loading this
from a file system or via TFTP, you know the size to load into memory.
If you are loading from some medium, like a raw flash card, you have
to make some assumptions about the size or tack a few bytes on the front
that indicate the length. Most systems have some custom boot loader
that requires a special, very small header, or they just jump to the
start of the image in flash rom.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-05-26 16:11 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-05-26 13:48 Questions about 8xxrom Brown, David (dbrown03)
2000-05-26 16:11 ` Dan Malek [this message]
2000-05-29 2:25 ` Graham Stoney
2000-05-29 21:48 ` Dan Malek
-- strict thread matches above, loose matches on Subject: below --
2000-05-30 13:35 Brown, David (dbrown03)
2000-05-30 17:41 ` Dan Malek
2000-06-01 6:49 Duncan Palmer
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