C910 with Linux on FPGA

Introduction

This project is from CAG lab of Xi'an JiaoTong University(XJTU).

We terms at ctreate CPU evaluation platform on FPAG, and the CPU we choose should satisfied these key features below.

• The CPU should adapts to high performance computing scenarios
• The CPU should be open-source which can be customized according to our demands
• The CPU should be compatible with performance statistics tools like Perf

According to these key features, We choose Xuantie-C910 as the basic design.

Prepare

Software

• vivado 2022.2

• debugserver

Hardware

• FACE-VUP-13B develop board (FPGA: VU13P)

  The board where we implement the CPU.

• Alinx FMC sub board (FL1010) if needed

  Connect this sub board to VU13P FPGA to expand more GPIO.

• CKLink board

  Connect this board to FPGA to download data to DDR.

• UART-USB board

  In order to realize the interaction between PC and CPU, this board should be connected to the FPGA.

Quick Start

1. Connect FPGA to PC

2. Write Bitstream to FPGA

   Related files:

   ​ ./Start_C910/c910_wrapper.bit ​ ./Start_C910/c910_wrapper.ltx

3. Open DebugServerConsole to connect to the CPU

   Related files:

   ​ ./Start_C910/gdbinit.ice_fpga.txt

4. Use GDB tools to write data to DDR

5. Start the OS

Steps

Key Commands

• Create a docker env :

  docker run -i -t --name xuantie -v /d/Work/002_RISC-V/docker_share:/share -v /dev/bus/usb:/dev/bus/usb 5c16158533e34e9f7f632842a4a9bd66ea63e57476f3949cd6c7dbeaaacfb0cb /bin/bash
  

  the usb sharing is optional if needed，and Install USBIPD-WIN first.

• Start a docker env :

  docker start xuantie
  docker exec -it xuantie /bin/bash
  

• Update dts

  under docker env

  ./run.sh 192.168.1.1:1025 ice_fpga 1
  

• Start DebugServerConsole:

  under dir "Install-Path/bin"

  ./DebugServerConsole.exe -port 1024
  

• Restore bin file to DDR

  riscv64-unknown-elf-gdb -ex "tar remote 172.28.208.1:1024" -x gdbinit.ice_fpga.txt
  

• Modify rootfs:

  gzip -d rootfs.cpio.gz
  mkdir rootfs_workspace; cd rootfs_workspace
  cp -r ../rootfs.cpio ./
  cpio -i < rootfs.cpio
  rm -f rootfs.cpio
  

  After modifying the files

  find ./* |cpio -H newc -o > ../rootfs_debug.cpio
  cd ../ ; gzip rootfs_debug.cpio > rootfs_debug.cpio.gz
  

• Perf Command:

  perf stat -e L1-dcache-load-misses -e L1-dcache-loads -e L1-dcache-store-misses -e L1-dcache-stores -e L1-icache-load-misses  -e L1-icache-loads -e LLC-load-misses -e LLC-loads -e LLC-store-misses -e LLC-stores -e dTLB-load-misses -e dTLB-loads -e dTLB-store-misses -e dTLB-stores -e iTLB-load-misses -e iTLB-loads ls
  

Full Project URL: 链接：https://pan.baidu.com/s/12K88M6ZaVnxCssfHfxp15A?pwd=0517 提取码：0517