xv6-65oo2

Port of Xv6 for 25∞2

unix xv6

Go to file

Frans Kaashoek 5304310452 Remove B_DIRTY Use refcnt to pin blocks into the cache Replace flags/B_VALID with a boolean field valid Use info[id].status to signal completion of disk interrupt Pass a read/write flag to virtio_disk_rw		2019-07-29 17:33:16 -04:00
doc	Add relevant docs to repo	2019-07-24 08:38:41 -04:00
kernel	Remove B_DIRTY	2019-07-29 17:33:16 -04:00
labs	checkpoint	2019-07-29 15:49:47 -04:00
mkfs	separate source into kernel/ user/ mkfs/	2019-06-11 09:57:14 -04:00
user	fix an exit/exit deadlock -> one more locking protocol violation	2019-07-25 06:30:49 -04:00
.cvsignore	update .cvsignore	2008-10-15 04:54:24 +00:00
.dir-locals.el	Setting indent-tabs-mode nil everywhere is dangerous	2011-09-05 15:22:16 -04:00
.gdbinit.tmpl-riscv	display assembly instructions, to help with first.tex exercise	2019-07-24 10:15:45 -04:00
.gitignore	Introduce alloc3_desc and UsedArea to make code easier to read	2019-07-01 08:20:35 -04:00
LICENSE	x	2019-07-24 09:06:49 -04:00
Makefile	split printf into a separate file, to make console.c more like a driver	2019-07-27 03:49:03 -04:00
README	feeble attempt at build instructions	2019-07-10 10:30:33 -04:00

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.

xv6 borrows code from the following sources:
    JOS (asm.h, elf.h, mmu.h, bootasm.S, ide.c, console.c, and others)
    Plan 9 (entryother.S, mp.h, mp.c, lapic.c)
    FreeBSD (ioapic.c)
    NetBSD (console.c)

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, Cody Cutler, Mike CAT, Tej Chajed, eyalz800,
Nelson Elhage, Saar Ettinger, Alice Ferrazzi, Nathaniel Filardo, Peter
Froehlich, Yakir Goaron,Shivam Handa, Bryan Henry, Jim Huang, Alexander
Kapshuk, Anders Kaseorg, kehao95, Wolfgang Keller, 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, 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 2006-2019 Frans Kaashoek, Robert Morris, and Russ Cox.

ERROR REPORTS

Please send errors and suggestions to Frans Kaashoek and Robert Morris
(kaashoek,rtm@mit.edu). The main purpose of xv6 is as a teaching
operating system for MIT's 6.828, 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".