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 $ make $ sudo make install

3. Modify defconfig

index c449421741..5a76600785 100644 --- a/boards/risc-v/fe310/hifive1-revb/configs/nsh/defconfig +++ b/boards/risc-v/fe310/hifive1-revb/configs/nsh/defconfig @@ -14,7 +14,7 @@ CONFIG_ARCH_BOARD="hifive1-revb" CONFIG_ARCH_BOARD_HIFIVE1_REVB=y CONFIG_ARCH_CHIP="fe310" CONFIG_ARCH_CHIP_FE310=y -CONFIG_ARCH_CHIP_FE310_G002=y +CONFIG_ARCH_CHIP_FE310_QEMU=y CONFIG_ARCH_INTERRUPTSTACK=1536 CONFIG_ARCH_RISCV=y CONFIG_ARCH_STACKDUMP=y

4. Configure and build NuttX

$ mkdir ./nuttx; cd ./nuttx $ git clone https://github.com/apache/nuttx.git nuttx $ git clone https://github.com/apache/nuttx-apps.git apps $ cd nuttx $ make distclean $ ./tools/configure.sh hifive1-revb:nsh $ make V=1

5. Run the nuttx with qemu

$ qemu-system-riscv32 -nographic -machine sifive_e -kernel ./nuttx

6. TODO

Support RISC-V User mode