[coreboot] Converting epia-n build to SeaBIOS
stepan at coresystems.de
Thu Aug 20 14:06:07 CEST 2009
Harrison, Jon (SELEX GALILEO, UK) schrieb:
> OK. So I seem to have got my build deploying seaBIOS (0.4.1) , but
> appear to have hit a major obstacle.
> No USB Keyboard Support!? This is a complete show stopper for me.
> I've seen a thread from last summer talking about adding USB Kbd
> Has anything happened anywhere on this ??
> I'm now trying to decide whether I fancy my chances of adding CBFS
> support to FILO or USB keyboard to SeaBIOS more !!!
USB keyboard support for SeaBIOS will require that you emulate a
standard PS/2 keyboard (io 0x60/0x62) interface in system management
mode (SMM), passing the commands on to a USB stack (There is one in
libpayload which should probably be used. It's the stack that is used in
FILO for USB keyboard support, too). Right now there is only a SMM
handler for i945/i82801gx, and it has no USB keyboard legacy emulation,
but it can show you quite well what needs to be done to implement an SMM
handler for a coreboot platform.
CBFS support in FILO (or libpayload, for that matter) is definitely the
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