Hi,
there are several legacy tables that PCBIOS writes, eg. about the io-ports of the various serial ports.
We probably need a place for them to be generated, as some clients might rely on the presence of these tables.
Grub2 definitely needs the serial port's ioport written at 0x400 (which the attached patch does) to support serial console, but I'm not sure if that's a good place to collect such configuration or where to put it instead. So please consider this patch an attempt to start a discussion... :-)
Regards, Patrick Georgi