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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

I is not fanat of Linux, still know a function mmap() with file 'fd = open("/dev/mem", O_RDWR|O_SYNC)', that get any system region to be visible in process. May be reverce function ? Sources for investigation ?

In any case, you may fill your malloc-ed region with unique string likewise "1@3$zxcv0(8&:LKJ", search it from FPGA and write to it all data :)

P.S. Or search your string from HPS: map sequentially all absolute knowing DDR memory with mmap(), find string, unmap, map upper...