Hi, Gerb,

The current UEFI payload can support 16550 UART compatible UART only.

The serial port I/O base and type (I/O or MMIO) are passed from coreboot to the 
UEFI payload.
In our test it is at I/O base 0x3F8 with baud rate set to 115200.

The debug will be on by default if you do a debug build for the UEFI payload.

Thanks
Maurice

-----Original Message-----
From: Gerd Hoffmann [mailto:kra...@redhat.com] 
Sent: Thursday, May 28, 2015 8:46 AM
To: Ma, Maurice
Cc: Laszlo Ersek; edk2-devel list; Dong, Guo; Scott Duplichan
Subject: Re: CorebootModulePkg: gcc reports conflicting types for 
'CbParseAcpiTable'

  Hi,

> CorebootPayloadPkg can support  both serial port (in/out) and Framebuffer 
> (out) as console.   

serial port @ standard pc location (i.e. iobase=0x3f8)?

> The debug output will be on serial port only at this point.

Anything specific needed to enable it or is it on by default (in debug builds)?

thanks,
  Gerd



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