[SeaBIOS] ohci bulk?

H. Peter Anvin hpa at zytor.com
Sat Nov 20 00:39:58 CET 2010

On 11/19/2010 02:58 PM, Gerd Hoffmann wrote:
> On 09/23/10 14:56, Kevin O'Connor wrote:
>> I suppose one could write a simple SMI handler that just set the OHCI
>> cmdstatus bits.  That probably wouldn't be too hard and it wouldn't be
>> too complex.
>    Hi folks,
> What is the current state of affairs?  Sooner or later we'll need a 
> solution for the pci-bar-access-from-real-mode issue ...
> I looked briefly at the usb3 specs and I think it is impossible to drive 
> a xHCI adapter without access to the PCI bar.
> Also AHCI support needs access to the PCI bar to submit commands and 
> check status.

Would INT 15h, AH=87h do the job well enough?  Otherwise it's probably
SMM or bust...


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