[U-Boot-Users] U-Boot help request for OHCI driver with CPU cache on

Markus Klotzbücher
2008-05-15T08:37:04Z

Ryan CHEN <ryan.chen@st.com> writes:

> I am porting U-Boot to a MIPS64 platform, that uses USB host controller NEC uPD720101 on PCI bus.

What CPU? What version of U-Boot are you using?

> I didn't modify anything related with USB driver, I just enabled OHCI
> in the configuration.

Please be more specific, *exactly* which USB options did you enable in
your config?

> When CPU cache is disabled, USB is perfect working.
> When CPU cache is enabled, every driver works well but not USB.

Again, what is "not working well"?

> Could you suggest me how to solve the problem?
> Is there any specific part of USB driver that requires cache handling?

None that I'm aware of, but I could imagine that enabling caches might
cause some kind of problems.