> I think the patch may be fundamentally flawed. Yes, I also believe the problem lies somewhere else.
> > If I understand correctly, the issue you are trying to address is that > after a flash program operation that involves bypassing the cache, the > data cache may still contain stale data from before. So you change the > verify code to look at the uncached flash contents. The problem is > that any subsequent code reading the flash may still get the stale > data from the cache. That's spot on. > In other words, you have not solved the problem. All that the patch > does is stop the verify code from reporting the problem. Yes, I'm afraid that's the case. > What should happen is that the flash driver does whatever is necessary > to keep the cache and the flash contents coherent. I believe the V2 > AMD and Strata drivers should do the right thing. _V2_CACHED_ONLY > should not be defined because the Nios II can bypass the cache when > manipulating flash, so _INTSCACHE_DEFAULT_END() should sync and > invalidate the data cache. When control returns to the generic flash > code all stale data should have been removed from the cache so the > verify code will see the new data. I am running STRATA V2. >From documentation I've got the impression that, if I can bypass the caches by modifying the address, I don't need the _INTSCACHE_DEFAULT_END macro. I guess this is wrong. Thanks for helping. Edgar -- Edgar Grimberg System Developer Zylin AS ZY1000 JTAG Debugger http://www.zylin.com/zy1000.html Phone: (+47) 51 63 25 00
