RISC-V CPU & System software implementation written in С
- Passes RISC-V compliance tests for both RV64 & RV32
- OpenSBI, U-Boot, custom firmwares boot and execute properly
- Linux kernel boots!
- Linux userspace works, interactive shell through UART
- Framebuffer graphics, working Xorg with mouse & keyboard
- Raw image mounted as rootfs
- Feature-complete RV64IMAFDC instruction set
- Multicore support (SMP)
- Bootrom, kernel Image loading
- DTB auto-generation, passing to firmware/kernel
- RVVM Lib API for VM integration
- MMU with SV32/SV39/SV48/SV57 virtual addressing
- UART 16550a-compatible text console
- PLIC/CLIC, timers
- PS2 Altera Controller, PS2 keyboard & mouse
- Graphical framebuffer through X11/WinAPI
- Generic PCI Bus
- ATA PIO hard drive
- ATA BMDMA (IDE UDMA) over PCI
- OpenCores Ethernet through Linux TAP
- Poweroff/reset device
Currently builds using GNU Make or CMake and tested on Linux, Windows and MacOS systems. More build targets are going to be supported.
git clone https://github.com/LekKit/RVVM
cd RVVM
make
cd release.linux.x86_64
To cross-compile, pass CC=target-gcc and OS=target-os if the target OS differs from your host to make. You can configure the build with use flags
Examples:
make CC=x86_64-w64-mingw32-gcc OS=windows USE_JIT=1
make CC=aarch64-linux-gnu-gcc OS=linux USE_FB=0 USE_NET=1 USE_JIT=0
Alternatively, you can use CMake (hint, build binaries are not host arch suffixed):
git clone https://github.com/LekKit/RVVM
cd RVVM
mkdir build
cmake -S. -Bbuild
cmake --build build --target all
cd build
./rvvm_x86_64 fw_jump.bin -kernel linux_Image -image rootfs.img -rv64 -mem 2G -smp 2 -res 1280x720
Argument explanation:
fw_jump.bin Initial firmware, OpenSBI in this case
-kernel linux_Image Kernel Image to be booted by SBI, etc
-image rootfs.img Hard drive image to be mounted as rootfs
-rv64 Enable RV64, RV32 is used by default
-mem 2G Memory amount (may be suffixed by k/M/G), default 256M
-smp 2 Amount of cores, single-core machine by default
-res 1280x720 Changes framebuffer & VM window resolution
Invoke "./rvvm_x86_64 -h" to see extended help.
- LekKit: RVVM API, interpreter, RV64IMAC ISA, RISC-V Hart/MMU/Privileged/CSR, codebase infrastructure, working on JIT
- cerg2010cerg2010: Important fixes, initial RV64 work, PLIC/PS2/ATA/Ethernet, XCB window backend, FPU extensions, FDT lib, working on PCI
- Mr0maks: Initial ideas, C/M extensions, VM debugger, CSR work, NS16550A UART
- Hoping to see more contributors here
- Test FreeBSD, HaikuOS (FreeBSD generic kernel boots but i have no idea how to mount rootfs, too lazy to look at Haiku)
- Improve RVVM Lib public API
- Working JIT infrastructure (many headaches from x86 backend)
- SATA/SCSI
- Sparse HDD image format, compression
- Userspace networking, sound?
- Maybe virtio devices
- Other peripherals
- A lot more...
- Userspace emulation?