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From
SubjectRe: EBDA Question
Date
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

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