[coreboot] Converting epia-n build to SeaBIOS

[Stefan Reinauer]

Kevin O'Connor wrote:
> 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.
>   

Hm.. Last thing I heard is that most boot loaders don't call intXX
functions but read int 0x60/0x64. I don't have definite numbers on that,
though. I suppose if a normal driver would work, we could hook up
another int in Jason's usbrom and we're good?

Stefan