From mboxrd@z Thu Jan  1 00:00:00 1970
From: Markus =?utf-8?Q?Klotzb=C3=BCcher?= <mk@denx.de>
Date: Thu, 15 May 2008 10:37:04 +0200
Subject: [U-Boot-Users] U-Boot help request for OHCI driver with CPU
	cache on
In-Reply-To: <00a901c8b644$c624a1e0$30065e0a@SHZ.ST.COM> (Ryan CHEN's message
	of "Thu\, 15 May 2008 12\:33\:07 +0800")
References: <00a901c8b644$c624a1e0$30065e0a@SHZ.ST.COM>
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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.

Best regards

Markus Klotzbuecher

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