Re: [lwip-users] Nios II TSE MAC

[Bill Auerbach]

Dave,

I wonder if the NIOS II core for the Stratix is different from the NIOS II
for the Cyclone III (which is what we use).  What memory allocation are you
referring to?  We've been shipping Cyclone III NIOS II products for almost 2
years and have had no issues.  When I did see cache consistency problems
with the NIOS II, it's not been with the driver but with my application
calling into lwIP.  On the Cyclone III, cache consistency issues with SGDMA
do lock up the processor.

Bill

>-----Original Message-----
>I'm using the Bill Auerbach's lwIP implementation on Nios II Development
>kit Stratix II edition (rohs).
>I am experiencing some problems with memory allocation: it seems that
>the call alt_remap_uncached causes a sort of misalignment of dma data,
>so structure pointers became inconsistent. The annoying thing is that in
>most cases the whole system appears to be tolerant to the fault and the
>flow carries on through random memory locations but sometimes a simple
>call to a free makes the pointer structure to collapse and the system to
>go in error.
>
>best regards,
>Dave