On 05/04/2011 11:22 AM, Glauber Costa wrote:
On Tue, 2011-05-03 at 20:51 -0400, Kevin O'Connor wrote:
On Tue, May 03, 2011 at 09:41:48PM -0300, Glauber Costa wrote:
On Tue, 2011-05-03 at 19:58 -0400, Kevin O'Connor wrote:
My understanding is that in a machine with multiple VGA devices only
one vga device is setup to forward the legacy VGA IO ranges over PCI,
and only that device should have its option ROM executed.
My understanding is that running the vga option roms for all vga
devices would be incorrect and could cause a real machine to not boot
properly.
how's that different in pci vs vgaroms/ ?
"Could cause a real machine to not boot" is true regardless.
I don't understand your question. For regular PCI devices every
option rom should be run, regardles of how many devices are in the
system. VGA option roms are special though - my understanding is
exactly one VGA device should have its option rom executed.
let me rephrase then: what if you have n vga option roms under fw_cfg's
vgaroms/ ?
Would you execute only one of them?
I'm a bit confused. With sgabios, how is it normally loaded on bare
metal? I thought it's often just flashed in a dummy PCI device, make
part of the BIOS image with a bios editor, or even loaded as part of a
NICs firmware.
Is it critical that this is loaded as a VGA rom verses a normal option ROM?
The only difference with VGA roms are that they are loaded slightly
earlier in the process. You shouldn't lose a lot loading them with
normal PCI option roms.
Regards,
Anthony Liguori
_______________________________________________
SeaBIOS mailing list
[email protected]
http://www.seabios.org/mailman/listinfo/seabios
