1. Download and install toolchain $ curl https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.3.0-2019.08.0-x86_64-linux-ubuntu14.tar.gz 2. Build and install qemu $ git clone https://github.com/qemu/qemu $ cd qemu $ ./configure --target-list=riscv32-softmmu,riscv64-softmmu $ make $ sudo make install 3. Configure and build NuttX $ mkdir ./nuttx; cd ./nuttx $ git clone https://github.com/apache/incubator-nuttx.git nuttx $ git clone https://github.com/apache/incubator-nuttx-apps.git apps $ cd nuttx $ make distclean $ ./tools/configure.sh rv-virt:nsh $ make 4. Run the nuttx with qemu $ qemu-system-riscv32 -semihosting -M virt,aclint=on -cpu rv32 -smp 8 -bios none -kernel nuttx -nographic or $ qemu-system-riscv64 -semihosting -M virt,aclint=on -cpu rv64 -smp 8 -bios none -kernel nuttx -nographic NuttShell (NSH) NuttX-10.3.0-RC1 nsh> mount -t hostfs -o fs=. /host nsh> cat /host/AUTHORS This is a list of all the contributors that have submitted ICLA, SGA If you are not on this list and believe you should be, please inform us. ICLA ==== ... nsh> 5. TODO Support FPU Support RISC-V User mode Support Network