vzaccaria / xv6-riscv

Xv6 for RISC-V

XV6 repo for Polimi AOS Students

This repo has been forked from the original Unix V6 port to RISCV. You can inspect the code, or even run it in an emulator (qemu) in a docker container.

Build and aunch the container

Cwd in the scripts directory; to build:

make build

this will take time as it has to download all the necessary toolchains. Once build, launch the interactive shell:

make connect

Once in the container, to compile the kernel:

cd /local && make TOOLPREFIX=/opt/riscv/toolchain/bin/riscv64-unknown-elf-

To run it on qemu

cd /local && make TOOLPREFIX=/opt/riscv/toolchain/bin/riscv64-unknown-elf- qemu

Original XV6 readme

xv6 is a re-implementation of Dennis Ritchie's and Ken Thompson's Unix
Version 6 (v6).  xv6 loosely follows the structure and style of v6,
but is implemented for a modern RISC-V multiprocessor using ANSI C.

ACKNOWLEDGMENTS

xv6 is inspired by John Lions's Commentary on UNIX 6th Edition (Peer
to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
2000)). See also https://pdos.csail.mit.edu/6.828/, which
provides pointers to on-line resources for v6.

The following people have made contributions: Russ Cox (context switching,
locking), Cliff Frey (MP), Xiao Yu (MP), Nickolai Zeldovich, and Austin
Clements.

We are also grateful for the bug reports and patches contributed by
Silas Boyd-Wickizer, Anton Burtsev, Dan Cross, Cody Cutler, Mike CAT,
Tej Chajed, Asami Doi, eyalz800, , Nelson Elhage, Saar Ettinger, Alice
Ferrazzi, Nathaniel Filardo, Peter Froehlich, Yakir Goaron,Shivam
Handa, Bryan Henry, jaichenhengjie, Jim Huang, Alexander Kapshuk,
Anders Kaseorg, kehao95, Wolfgang Keller, Jonathan Kimmitt, Eddie
Kohler, Austin Liew, Imbar Marinescu, Yandong Mao, Matan Shabtay,
Hitoshi Mitake, Carmi Merimovich, Mark Morrissey, mtasm, Joel Nider,
Greg Price, Ayan Shafqat, Eldar Sehayek, Yongming Shen, Fumiya
Shigemitsu, Takahiro, Cam Tenny, tyfkda, Rafael Ubal, Warren Toomey,
Stephen Tu, Pablo Ventura, Xi Wang, Keiichi Watanabe, Nicolas
Wolovick, wxdao, Grant Wu, Jindong Zhang, Icenowy Zheng, and Zou Chang
Wei.

The code in the files that constitute xv6 is
Copyright 2006-2020 Frans Kaashoek, Robert Morris, and Russ Cox.

ERROR REPORTS

Please send errors and suggestions to Frans Kaashoek and Robert Morris
(kaashoek,[e-mail]). The main purpose of xv6 is as a teaching
operating system for MIT's 6.S081, so we are more interested in
simplifications and clarifications than new features.

BUILDING AND RUNNING XV6

You will need a RISC-V "newlib" tool chain from
https://github.com/riscv/riscv-gnu-toolchain, and qemu compiled for
riscv64-softmmu. Once they are installed, and in your shell
search path, you can run "make qemu".