[U-Boot] [PATCH 0/4] Add preliminary cache support to i.MX6

[Marek Vasut]

> On 03/02/2012 04:06 PM, Eric Nelson wrote:
> > This series of patches defines the prerequisites for cache support on
> > i.MX6 to allow further driver development to occur.
> > 
> > It does not enable the use of the data cache by default. To enable
> > data cache, comment out this line in mx6qsabrelite.h or mx6qarm2.h:
> > 
> > #define CONFIG_SYS_DCACHE_OFF
> 
> I meant to add a note to this commit message indicating the
> drivers which are known to need work before cache is enabled:
> 
> 	- mmc
> 	- usb host
> 	- sata
> 
> Each of these is functional after issuing 'dcache off', but non-functional
> with dcache enabled.

USB is broken, but someone is working on that, search the mailing list:

[U-Boot] [PATCH] usb: align buffers at cache boundary