How to use the memory of the Xilinx-FPGA Virtex5/7 as a memory mapped into the x86-CPU's address space?

Question

Is it possible to use the memory of the Xilinx-FPGA Virtex5/7 as a memory mapped into the virtual and/or physical address space of the Intel x86_64-CPU's memory and how to do it?

As maximum, I need to use unified single address space with having of direct memory access (DMA) to the memory of FPGA from CPU (like as simple memory access to CPU-RAM).

CPU: x86_64 Intel Core i7
OS: Linux kernel 2.6
Interface connection: PCI-Express 2.0 8x

What CPU? What system? How are they connected?

Carl Norum
– Carl Norum

2013-10-04 18:02:24 +00:00
Commented Oct 4, 2013 at 18:02 — Carl Norum
– Carl Norum, Commented Oct 4, 2013 at 18:02
@Carl Norum Ok. I added clarification.

Alex
– Alex

2013-10-05 08:44:14 +00:00
Commented Oct 5, 2013 at 8:44 — Alex
– Alex, Commented Oct 5, 2013 at 8:44

Martin Thompson · Accepted Answer · 2013-10-07 10:21:37Z

1

You can in theory.

You'll need to write a bunch of VHDL/Verilog to take the PCIe packets and respond to them appropriately, by controlling the address, data and control lines of the internal memory "BlockRAMs", to do its reading and writing. Treating all the BlockRAM as one massive memory is likely to have routing congestion problems I imagine though!

answered Oct 7, 2013 at 10:21

Martin Thompson

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