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

14 Jan 2015

      Fei,
Yes, for SeaBIOS I did just like you wrote. However, sgabios may only be 
configured by modifying the source files.
-Viktor
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@gmail.com 
mailto:gaumless@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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