From: Dan Malek <dan@netx4.com>
To: diekema_jon <diekema@bucks.si.com>
Cc: linuxppc-embedded@lists.linuxppc.org
Subject: Re: EST SBC8260 Linux memory mapping rules
Date: Fri, 19 May 2000 21:34:24 -0400 [thread overview]
Message-ID: <3925EBA0.ABFE1267@embeddededge.com> (raw)
In-Reply-To: m12sxXK-001SyZC@bucks
diekema_jon wrote:
> - The compressed Linux kernel (zImage) contains a bootstrap loader
> that is position independent; you can load it into any RAM,
> ROM or FLASH memory address >= 0x00200000 (above 2 MB).
>
> Note: If zImage is loaded at its link address of 0x00400000 (4 MB),
> then zImage will skip the step of moving itself to
> its link address.
The zImage should be loaded above the link address by at least the
amount of memory required by the uncompress/setup functions. If you
load it below the address, it could potentially relocate itself on
top of the kernel or ram disk image. For example, the uncompress/setup
functions are linked to run at 0x00400000, based upon the current size
of the functions, you need to load above 0x00407000. I would pick
0x00480000 or higher, just to not worry about it.
> and I/O devices above phsical address 0x80000000. The lowest
You could fix this typo....it should be 'physical'.
-- Dan
** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2000-05-20 1:34 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2000-05-20 0:54 EST SBC8260 Linux memory mapping rules diekema_jon
2000-05-20 1:34 ` Dan Malek [this message]
2000-05-20 2:49 ` diekema_jon
2000-05-20 4:47 ` Dan Malek
2000-05-22 16:43 ` Wait Queue bug triggered on EST SBC8260 diekema_jon
2000-05-24 20:14 ` diekema_jon
2000-05-24 20:24 ` Joe Green
2000-05-24 20:29 ` Joe Green
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