RISC-v emulator

Changes are based on https://risc-v-getting-started-guide.readthedocs.io/en/latest/linux-qemu.html

For Ubuntu/Debian, in addition to

sudo apt install autoconf automake autotools-dev curl libmpc-dev libmpfr-dev libgmp-dev \
                 gawk build-essential bison flex texinfo gperf libtool patchutils bc \
                 zlib1g-dev libexpat-dev git

You will need the development headers for

sudo apt-get install libglib2.0-dev libpixman-1-dev libncurses-dev


Before building Busybear Linux, you will need to softlink riscv-pk into busy bear-linux because git checkout put riscv-pk into the riscv64-linux.

cd riscv64-linux/busybear-linux

rm -rf src/riscv-pk

ln -s ../riscv-pk src/

You need to enable the following modules within .config in the linux folder.

CONFIG_E100=y

CONFIG_E1000=y

CONFIG_E1000E=y

Start the QEMU emulator with the following command:

  sudo qemu-system-riscv64 \

        -nographic \

        -machine virt \

        -kernel riscv-pk/build/bbl \

        -append "root=/dev/vda ro console=ttyS0" \

        -drive file=busybear-linux/busybear.bin,format=raw,id=hd0 \

        -device virtio-blk-device,drive=hd0 \

        -netdev type=tap,script=./ifup,downscript=./ifdown,id=net0 \

        -device virtio-net-device,netdev=net0