[U-Boot] u-boot v2016.09-rc2: cache alignment issues on sunxi-based systems

[Hans de Goede]

Hi,

On 10-09-16 22:09, Karsten Merker wrote:
> Hello,
>
> I have run tests of u-boot v2016.09-rc2 and current u-boot git
> head (as of commit 9dd1d0aa4e086bc8a5eaf19a67825c3323c41c5a) on
> various Allwinner A20-based systems and when netbooting a kernel,
> I get the following warning/error:
>
>   "CACHE: Misaligned operation at range [43300000,4450e2f0]"
>
> Everything seems to work normally despite the message, though.
> Looking through the u-boot list archives I have found
>
>   http://lists.denx.de/pipermail/u-boot/2016-August/264405.html
>
> and
>
>   http://lists.denx.de/pipermail/u-boot/2016-August/262669.html
>
> which could be related to the issue, but I know too little about
> cache handling to really understand what is going on there.
>
> The warning/error message is printed only when netbooting;
> booting from MMC and USB doesn't show the message, so this could
> possibly indicate an issue with the stmmac driver.

Yes looks like a stmmac driver issue indeed, specifically
it seems to not be aligning the size/end of a dma flush
request.

Regards,

Hans


>
> Affected systems include:
> - Olimex A20-OLinuXino-Lime2
> - LeMaker BananaPro
> - Cubietech Cubieboard2
> - Cubietech Cubietruck
>
> Regards,
> Karsten
>