[U-Boot] SoCFPGA cache / S-bit problem - was Re: Newbie SPL question for socfpga_sockit

[Dinh Nguyen]

On Wed, Mar 23, 2016 at 10:37 AM, Stefan Roese <sr at denx.de> wrote:
>
> I can't really comment on the USB problem, as I've only seen this
> d-cache / S-bit problem with SPI NOR flash. This is because I've never
> really used USB on this platform intensively. But I'm nearly 100%
> sure, that all changes that add some delays (or debug printfs)
> resulting in a "working solution", either in the USB case or the SPI
> NOR case, are just papering over the real problem.
>

After a quick chat with Mark Rutland here at ELC, he alluded that there
could be a problem with the PL310 interfering with the L1 DCACHE. I won't
be able to try it until I get back, but perhaps somebody can test turning
off the PL310?

--- a/include/configs/socfpga_common.h
+++ b/include/configs/socfpga_common.h
@@ -78,7 +78,6 @@
  * Cache
  */
 #define CONFIG_SYS_CACHELINE_SIZE 32
-#define CONFIG_SYS_L2_PL310
 #define CONFIG_SYS_PL310_BASE          SOCFPGA_MPUL2_ADDRESS

 Dinh