[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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