From: hpa@zytor.com (H. Peter Anvin)
To: linux-kernel@vger.kernel.org
Subject: Re: EBDA Question
Date: Tue, 8 Feb 2005 23:28:05 +0000 (UTC) [thread overview]
Message-ID: <cubhu5$3jf$1@terminus.zytor.com> (raw)
In-Reply-To: 91888D455306F94EBD4D168954A9457C01297B87@nacos172.co.lsil.com
Followup to: <91888D455306F94EBD4D168954A9457C01297B87@nacos172.co.lsil.com>
By author: "Moore, Eric Dean" <Eric.Moore@lsil.com>
In newsgroup: linux.dev.kernel
>
> EBDA - Extended Bios Data Area
>
> Does Linux and various boot loaders(lilo/grub/etc)
> having any restrictions on where and how big
> memory allocated in EBDA is? Is this
> handled for 2.4/2.6 Kernels?
>
> Reason I ask is we are considering having
> BIOS(for a SCSI HBA Controller) allocating
> memory in EBDA for Firmware use.
> We are concerned whether Linux would be writing
> over this region of memory during the handoff
> of BIOS to scsi lower layer driver loading.
>
In general, dropping the EBDA below 0x9a000 is probably a
bad idea. Recent Linux kernels and boot loaders should handle it,
though. Keep in mind that you might find yourself in serious trouble
if you then have, for example, a PXE stack layered on top of your SCSI
BIOS.
-hpa
next prev parent reply other threads:[~2005-02-08 23:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-02-07 19:45 EBDA Question Moore, Eric Dean
2005-02-08 23:28 ` H. Peter Anvin [this message]
2005-02-26 19:08 ` Bukie Mabayoje
2005-02-27 3:42 ` H. Peter Anvin
-- strict thread matches above, loose matches on Subject: below --
2005-02-07 20:54 Salyzyn, Mark
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