On Wed, 2016-03-30 at 13:46 +0000, Bakhvalov, Denis (Nokia - PL/Wroclaw) wrote:
Hi Marek,
Do "dcache off" and then update the flash again, it will work. That's the cache issue which we cannot track down.
Thank you for you quick support!
Maybe it's worth to invent a temporary solution? Because in other way users will face problems which are hard to find (I've been chasing this problem for 2 days). For example execute "dcache off" internally when sf write is called?
I believe we can turn of the dcache as default for socfpga while effort in progress to figure out the issue.
FYI, I was experimenting with L2 cache PL-310 registers but not successful. I am trying to understand any issue between L2 cache and the SDRAM. There is l2 cache sync after a flush but seems its not working fine. Adding delay works but that not deemed a correct solution (for USB case). Probably doing a virtual memory aliasing might understand where the data was stuck.
Thanks Chin Liang
Best regards, Denis Bakhvalov