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

[WANG FEI]

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> 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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