VHDL code for PC-FPGA connection

Hi to everyone,

I want to connect my PC with the FPGA with a fast connection using low-level codes. That is, I don't want to use NIOS processor since I have my own data-mining oriented blocks and I need all the FPGA Logic Elements as possible for this task. The problem is that I have to transfer Gigabytes of information from the PC to the FPGA in reasonable times. I though to use an ethernet connection for this or maybe an USB connection but I need low-level codes for this task. How can I get these codes (in VHDL format as an example)?. In fact probably this is a common problem for FPGA users. Can anyone help me with this?

Thank you!

Josep Lluís from Spain.