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

Connect FPGA to PC
Write Bitstream to FPGA

Related files:

./Start_C910/c910_wrapper.bit ./Start_C910/c910_wrapper.ltx
Open DebugServerConsole to connect to the CPU

Related files:

./Start_C910/gdbinit.ice_fpga.txt
Use GDB tools to write data to DDR
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

xjtuiair-cag/c910-fpga