qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] Re: [Bochs-developers] [PATCH v2 5/6] Don't use unreservedm


From: Kevin O'Connor
Subject: [Qemu-devel] Re: [Bochs-developers] [PATCH v2 5/6] Don't use unreservedmemory in BIOS.
Date: Sun, 9 Nov 2008 14:43:21 -0500
User-agent: Mutt/1.5.18 (2008-05-17)

On Sun, Nov 09, 2008 at 06:40:18PM +0100, Sebastian Herbszt wrote:
> Kevin O'Connor wrote:
> > Random note - I'm told that some option roms can relocate the EBDA.
> > Setting the stack in the EBDA area will prevent that from working.
> 
> The option rom for the LSI SCSI controller (8xx_64.rom) relocates the
> EBDA. It moves it from 0x9fc0 to 0x9f00.

Thanks Sebastian.

Do you know of any document or specification that details how the bios
is supposed to handle this case and/or how an option rom should
accomplish this?

One of the questions I have, is how the bios should handle the e820
map when this happens.  Currently, bochs bios always reserves 1K at
0x9fc0.  If the ebda is moved to 0x9f00, should bochs reserve 1K at
0x9f00 or 4K at 0x9f00?

-Kevin




reply via email to

[Prev in Thread] Current Thread [Next in Thread]