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zslwyuan / AMF-Placer

AMF-Placer 2.0: An open-source timing-driven analytical mixed-size FPGA placer of heterogeneous resources (LUT/FF/LUTRAM/MUX/CARRY/DSP/BRAM...)
Apache License 2.0
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Extension to other Xilinx FPGA device #8

Closed lesliepy99 closed 2 years ago

lesliepy99 commented 2 years ago

Hi. I'm now working on a project and want to extend AMF-Placer to another FPGA device (namely, ZCU104), I'm wondering where should I get the device layout of ZCU104(or other device) such that I can modify the parser and extract the device location? Thanks a lot!

zslwyuan commented 2 years ago

Hi @lesliepy99 , Yes you can and the steps are provided here: https://zslwyuan.github.io/AMF-Placer/md_doc_pages__2_5__extract_device_informationfrom_vivado.html

lesliepy99 commented 2 years ago

Hello @zslwyuan, I mean I want to try on another device instead of VCU108, and when I viewing the code in this file, it seems that you first get the X and Y for each site, then infer the exact centric location of each BEL by some rule, what I really want to know is how to design such rule. Thanks!

zslwyuan commented 2 years ago

Hello @zslwyuan, I mean I want to try on another device instead of VCU108, and when I viewing the code in this file, it seems that you first get the X and Y for each site, then infer the exact centric location of each BEL by some rule, what I really want to know is how to design such rule. Thanks!

Actually, we infer the exact location via the Vivado Device View, where the device is visualized. When a device is visualized in Vivado, you can roughly get the location of each site. However, the distance between two visualized sites is not exactly the physical distance so we have a parameter "y2xratio" in the configuration file to tune the relative ratio of the distance between X/Y directions. ^_^ @lesliepy99

zslwyuan commented 2 years ago

we try several values for "y2xratio" to see which one can generate placement close to the one of Vivado. And we found that "0.4" is a good value for Ultrascale devices.

lesliepy99 commented 2 years ago

Thanks a lot!