Hello,
So, after editing sgabios.h I saw that sgabios actually loaded. As I did
not disable serial output in SeaBIOS and Grub, I got duplicate
characters and lines. I know, if I disable all serial output, that
should most probably solve it. However, I still need debug messages, so
I decided to use only serial input/output. The only issue with this that
I had before is that Grub was configured to load splashimage which, it
seems, interfered with the serial output. So, when I disabled it, it
loaded just fine.
And now I have the following setup controlled completely by serial
input/output: coreboot -> SeaBIOS -> Grub -> Linux. There is just one
little annoying issue now. SeaBIOS does not respond to F12 via serial IO.
-Viktor
On 13.01.2015 06:33, Martin Roth wrote:
Hi Viktor,
Yes, I think having option roms checked is probably required. The
only other thing I'd recommend is to build SeaBIOS outside of the
coreboot structure and pull it in as an elf payload. Building within
coreboot is handy, but it doesn't offer the flexibility or control
that you get building it yourself.
Martin
On 01/12/2015 01:50 AM, Kuzmichev Viktor wrote:
On 11.01.2015 07:45, Martin Roth wrote:
On 01/10/2015 07:53 AM, Kevin O'Connor wrote:
On Thu, Dec 25, 2014 at 11:45:40AM +0300, Kuzmichev Viktor wrote:
Hello,
I've been trying to boot grub installed on the hard drive using
coreboot and
SeaBIOS as a payload. The motherboard I'm using is Intel Mohon
Peak. Also, I
do not use VGA for output, only serial port. So, I included the
sgabios into
my rom file. Here is its layout:
It should have worked. How did you build SeaBIOS, what SeaBIOS config
did you use, and what changes have you made to SeaBIOS?
-Kevin
As I recall, Mohon Peak uses 0x2f8 for the console serial port. Did
you set sgabios to output to 2f8 instead of 3f8 in sgabios.h?
sgabios.h:#define COM_BASE_ADDR 0x3f8
Martin
Thank you for your replies!
Just checked sgabios.h and changed serial port base address to 2f8.
Somehow I missed it earlier, although I did set this parameter in
both coreboot and SeaBIOS before. Sadly, I do not currently have
access to Mohon Peak, so I can't really test this right now but,
hopefully, I would be able to test this in a few days.
Also, I'd like to clarify one more thing. Should Option ROMS
parameter in SeaBIOS menuconfig be checked for sgabios to work? Are
there any other nuances I should keep in mind?
Viktor
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