[SeaBIOS] HPET configuration in Seabios

[Jan Kiszka]

On 2011-08-29 13:00, Avi Kivity wrote:
> On 08/29/2011 01:25 PM, Jan Kiszka wrote:
>>>
>>>  Can't seabios just poke at the hpet itself and see if it exists or not?
>>>
>>
>> Would be hard for the BIOS to guess the locations of the blocks unless
>> we define the addresses used by QEMU as something like base + hpet_no *
>> block_size in all cases.
>>
> 
> Currently we have a fixed address.  We could do:
> 
>   if available in fw_cfg:
>       use that (may indicate no hpet)
>   elif fixed address works:
>       use that
>   else
>       no hpet

Currently, we also only have a single HPET block, but that's just
because of some QEMU limitations that will vanish sooner or later. Then
nothing will prevent multiple "-device hpet,base=XXX".

Jan

-- 
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux