[coreboot] SeaBIOS, serial output, grub, sgabios does not seem to load

Kuzmichev Viktor kuzmichevviktorv at gmail.com
Wed Jan 14 12:46:07 CET 2015


Yes, for SeaBIOS I did just like you wrote. However, sgabios may only be 
configured by modifying the source files.


On 14.01.2015 13:29, WANG FEI wrote:
> Kuzmichev,
> Changing the seabios serial port base address, you should modify it 
> via "make menuconfig" command, it's much easy and efficiency.
> It's not recommended to modify the actual source files.
> -Fei
> On Tue, Jan 13, 2015 at 3:33 AM, Martin Roth <gaumless at gmail.com 
> <mailto:gaumless at gmail.com>> 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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