Re: CorebootPayloadPkg: redirect UEFI Shell to serial

["Piotr Król" <piotr.krol@3mdeb.com>]

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On 07/11/2017 08:01 PM, Laszlo Ersek wrote:

Hi Laszlo,
thanks for taking time to reply.

> 
> CorebootPayloadPkg/CorebootPayloadPkgIa32X64.dsc seems to correctly
> include the general SerialDxe driver:
> 
> # # ISA Support # MdeModulePkg/Universal/SerialDxe/SerialDxe.inf
> 
> and on top of that, the terminal and console drivers:
> 
> # # Console Support # 
> MdeModulePkg/Universal/Console/ConPlatformDxe/ConPlatformDxe.inf 
> MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitterDxe.inf 
> MdeModulePkg/Universal/Console/GraphicsConsoleDxe/GraphicsConsoleDxe.inf
>
>
> 
MdeModulePkg/Universal/Console/TerminalDxe/TerminalDxe.inf
> 
> I imagine SerialDxe is not configured correctly for the platform. 
> Can you look into the PCDs that SerialDxe consumes (see the INF 
> file),

Logs appear correctly in DXE and BDS, so at least at some point it
works. Boot logs for SHELL_TYPE=UEFI_BIN adn SHELL_TYPE=BUILD_UEFI:
http://81.95.197.197:7777/aciqabilaw
http://81.95.197.197:7777/ijopesosuy

It would be great to have the same for Shell application.

Board schematics is open and available here:
http://www.pcengines.ch/schema/apu2c.pdf
You can see that serial is exposed through LPC.

I tried to modify PcdSerialUseMmio to TRUE, but it doesn't seem to
affect anything. Linux say "ttyS0 at I/O 0x3f8", so using IO seems to
be fine.

> and/or whether 
> "CorebootModulePkg/Library/BaseSerialPortLib16550/BaseSerialPortLib16550.inf",
>
>
> 
which SerialDxe depends on in the CorebootPayloadPkg build, is
> appropriate for your hardware? (This lib instance also consumes a 
> large set of PCDs.)

I was able to get some results after removing:
DebugLib|MdePkg/Library/UefiDebugLibConOut/UefiDebugLibConOut.inf
from Shell.inf section in DSC. Boot log:
http://81.95.197.197:7777/isenazutac

As you can see I'm getting some logs from Shell entry point and it
looks like DoShellPrompt start, but it doesn't appear on serial. In
DoShellPrompt thing wait on ShellInfoObject.NewEfiShellProtocol->ReadFile
so it seems no input from serial is accepted.

Any further steps appreciated. I believe I need no stuff related to
GOP, maybe it cause some problems ?

Best Regards,
- -- 
Piotr Król
Embedded Systems Consultant
https://3mdeb.com | @3mdeb_com
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