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Can you add some signaltap probes around your master, to check that it is actually writing to the memory?
I have never developped on embedded with Linux, but basically you shoudln't need to limit the ram available to the operating system. Just allocate a block of memory (aligned with data cache lines), obtain it's real physical address (if you are using an MMU) and have your hardware write to it. Once it's done, don't forget to invalidate the data cache before accessing the data from the software.
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I'll have to look into the SignalTap part, I think that's been a big part of my issue is not really knowing where things are going wrong since I'm not exactly an expert on how to use Altera's tools. Also for anyone else that happens to have similar issues to mine I forgot to set the byteenable bits, so that is at least part of my issue. I'll look into what you were saying about the memory part as well. Would you happen to have a guide or anything for more info on that? Or would that be a better question for the software side of the forum?
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