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cpu/vexiiriscv integration #1923
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Here is an example of a debian ready dual core (WIP) : python3 -m litex_boards.targets.digilent_nexys_video --cpu-type=vexiiriscv --with-jtag-tap --bus-standard axi-lite --vexii-args=" \
--allow-bypass-from=0 --debug-privileged --with-mul --with-div --div-ipc --with-rva --with-supervisor --performance-counters 0 \
--regfile-async --xlen=64 --with-rvc --with-rvf --with-rvd --fma-reduced-accuracy \
--fetch-l1 --fetch-l1-ways=4 --fetch-l1-mem-data-width-min=64 \
--lsu-l1 --lsu-l1-ways=4 --lsu-l1-mem-data-width-min=64 --lsu-l1-store-buffer-ops=32 --lsu-l1-refill-count 2 --lsu-l1-writeback-count 2 --lsu-l1-store-buffer-slots=2 --with-lsu-bypass \
--with-btb --with-ras --with-gshare --relaxed-branch" --cpu-count=2 --with-jtag-tap --with-video-framebuffer --with-sdcard --with-ethernet --with-coherent-dma --l2-byte=131072 --update-repo=no --sys-clk-freq 100000000 --build --load |
Updated it with 3 base variant : On digilent video : # debian ready :
python3 -m litex_boards.targets.digilent_nexys_video --cpu-type=vexiiriscv --cpu-variant=debian --cpu-count=1 --with-video-framebuffer --with-sdcard --with-ethernet --with-coherent-dma --build --load
#debian ready with more perf
python3 -m litex_boards.targets.digilent_nexys_video --cpu-type=vexiiriscv --cpu-variant=debian --bus-standard axi-lite --vexii-args="--regfile-async --lsu-l1-store-buffer-ops=32 --lsu-l1-refill-count 2 --lsu-l1-writeback-count 2 --lsu-l1-store-buffer-slots=2" --cpu-count=4 --with-jtag-tap --with-video-framebuffer --with-sdcard --with-ethernet --with-coherent-dma --l2-byte=262144 --build --load |
--l2-self-flush=40c00000,40DD4C00,1666666
@enjoy-digital |
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Awesome, thanks @Dolu1990!
Documentation about how to deploy buildroot / debian here : |
Great, thanks @Dolu1990! |
Do not merge yet (WIP)
Hi,
This PR add VexiiRiscv in Litex. Here is an example to generate a quad-core linux capable RISC-V on digilent_nexys_video :
(single issue, RV32IMASU, linux ready, performances look quite good so far)
python3 -m litex_boards.targets.digilent_nexys_video --soc-json build/digilent_nexys_video/csr.json --cpu-type=vexiiriscv --vexii-args="--allow-bypass-from=0 --debug-privileged --with-mul --with-div --div-ipc --with-rva --with-supervisor --performance-counters 0 --fetch-l1 --fetch-l1-ways=4 --lsu-l1 --lsu-l1-ways=4 --fetch-l1-mem-data-width-min=64 --lsu-l1-mem-data-width-min=64 --with-btb --with-ras --with-gshare --relaxed-branch --regfile-async --lsu-l1-refill-count 2 --lsu-l1-writeback-count 2 --lsu-l1-store-buffer-slots=2 --lsu-l1-store-buffer-ops=32 --with-lsu-bypass" --cpu-count=4 --with-jtag-tap --with-video-framebuffer --with-sdcard --with-ethernet --with-coherent-dma --l2-bytes=262144
Todo :