This directory contains everything necessary to build and run a minimal Linux kernel targeting rv.
mach.c implements a basic machine with the following hardware:
rv.cRISC-V cpu core (duh)rv_clint.cRISC-V Core-Local Interruptor (CLINT)rv_plic.cRISC-V Platform-Level Interrupt Controller (PLIC)rv_uart.cSiFive Universal Asynchronous Receiver/Transmitter (UART) (2x)
Congratulations, you get to compile Linux!
# [All commands are executed in this directory (rv/tools/linux)]
# download/extract buildroot
curl -L https://github.com/buildroot/buildroot/archive/refs/tags/2023.11.1.tar.gz -o buildroot.tar.gz
tar -xf buildroot.tar.gz && mv buildroot*/ buildroot/
# build linux (this should take a long time)
make -C buildroot BR2_EXTERNAL=$(realpath extern) rv_defconfig
make -C buildroot
# build linux once more to fix initrd issues (should not take long)
make -C buildroot linux-rebuild opensbi-rebuild all
# build the machine
make mach
# run the machine
./mach buildroot/output/images/fw_payload.bin buildroot/output/images/rv.dtb