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Altera_Forum's avatar
Altera_Forum
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11 years ago

Linux access to non-Linux memory

I want to write large amounts of data into DDR using the FPGA. This works, and I can store data at the required rate. I want the ARM on the C5SOC chip to be able to process that data. I have ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

Reserving a chunk of physical memory (as you've done) is probably easiest.

Does seem like you've got uncached access to the memory.

You didn't say which device you've opened (for the mmap), there might be one that gives cached access.

Otherwise you'll need to write a device driver and work out how to map the memory cached and then implement mmap().