[coreboot] Converting epia-n build to SeaBIOS
kevin at koconnor.net
Fri Aug 21 04:32:46 CEST 2009
On Thu, Aug 20, 2009 at 02:06:07PM +0200, Stefan Reinauer wrote:
> Harrison, Jon (SELEX GALILEO, UK) schrieb:
>> 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.
I believe it is possible to add USB keyboard support to SeaBIOS
without requiring SMM mode. I believe a regular usb keyboard driver
will work fine.
> CBFS support in FILO (or libpayload, for that matter) is definitely the
> quicker approach.
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