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.
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...