Running Linux inplace, from EPCS or CFI

Thanks for the reply hippo.

So, XIP is not supported. Running from CFI/EPCS wouldn't bother me so much, even if it is very slow. It's not the speed of the Linux system that I care about, it's the data logging in our custom peripheral that needs to be fast.

I can't log directly to disk, as I am capturing 16-bit samples at 50 Msps. So what I was planning to do was log 10 seconds (~1 gig) worth of data to DRAM using DMA from our custom logic, and then spend 20 minutes or so writing this to a disk using FTP.

I realise that I am going to need to work with what is available. I was just disappointed to read of this 256MB limitation. All the Nios literature I have read claims a 2 GB address space, and so it is a bit deceptive to hide away this "small limitation" in the fine print in a development kit readme.txt.

So it looks like I am stuck with 128 MB, but thanks for the help. Such are the trade-offs of quick development time!