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Assembly 3.7%
Makefile 3.4%
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kaashoek 641e29c583 add copyright notice
2006-09-07 19:37:16 +00:00
.cvsignore New formatting scripts. 2006-09-05 15:50:55 +00:00
8253pit.c fix ide, pit interfaces 2006-09-07 15:29:54 +00:00
asm.h wrap long lines 2006-09-06 19:08:14 +00:00
bio.c debugging help 2006-09-07 16:54:28 +00:00
bootasm.S wrap long lines 2006-09-06 19:08:14 +00:00
bootmain.c wrap long lines 2006-09-06 19:08:14 +00:00
bootother.S wrap long lines 2006-09-06 19:08:14 +00:00
buf.h LRU disk cache replacement 2006-08-12 22:34:13 +00:00
cat.c standardize various * conventions 2006-09-06 17:27:19 +00:00
console.c debugging rearrangements 2006-09-07 16:52:13 +00:00
defs.h missing def 2006-09-07 16:54:23 +00:00
dev.h remove _ prefixes 2006-09-07 13:08:23 +00:00
dot-bochsrc update 2006-07-26 10:17:39 +00:00
echo.c i/o redirection in sh 2006-08-23 01:09:24 +00:00
elf.h more comments 2006-09-07 14:12:30 +00:00
fcntl.h low-level keyboard input (not hooked up to /dev yet) 2006-08-10 02:07:10 +00:00
file.c comments 2006-09-07 14:28:12 +00:00
file.h fd.* -> file.* 2006-09-06 18:40:28 +00:00
fs.c allow long names again 2006-09-07 15:34:28 +00:00
fs.h more comments 2006-09-07 14:12:30 +00:00
fsvar.h comments 2006-09-07 15:31:33 +00:00
ide.c fix disk bug 2006-09-07 16:54:18 +00:00
init.c for vs while 2006-09-06 18:47:51 +00:00
ioapic.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
ioapic.h wrap long lines 2006-09-06 19:08:14 +00:00
kalloc.c more comments 2006-09-07 14:12:30 +00:00
lapic.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
ls.c remove _ prefixes 2006-09-07 13:08:23 +00:00
main.c fix build 2006-09-07 14:10:52 +00:00
Makefile remove fstest 2006-09-07 14:17:30 +00:00
mkdir.c more comments 2006-09-07 14:12:30 +00:00
mkfs.c avoid system binary clashes 2006-09-07 13:07:39 +00:00
mmu.h better comment 2006-09-07 16:54:15 +00:00
mp.c comment fixes 2006-09-07 13:07:52 +00:00
mp.h wrap long lines 2006-09-06 19:08:14 +00:00
Notes nit in console interrupts 2006-09-07 00:00:33 +00:00
param.h struct fd -> struct file 2006-09-06 18:38:56 +00:00
picirq.c fix ide, pit interfaces 2006-09-07 15:29:54 +00:00
pipe.c fd_* => file_* 2006-09-06 18:43:45 +00:00
printf.c no /* */ comments 2006-09-06 17:50:20 +00:00
proc.c check preconditions in sched 2006-09-07 16:54:00 +00:00
proc.h more comments 2006-09-07 14:12:30 +00:00
README add copyright notice 2006-09-07 19:37:16 +00:00
rm.c standardize various * conventions 2006-09-06 17:27:19 +00:00
runoff better page breaks 2006-09-07 13:07:29 +00:00
runoff.list run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
setjmp.S more comments 2006-09-07 14:12:30 +00:00
sh.c more simplifying 2006-09-07 03:16:15 +00:00
sign.pl spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
spinlock.c comment memory barriers 2006-09-07 16:53:49 +00:00
spinlock.h more comments 2006-09-07 14:12:30 +00:00
stat.h more comments 2006-09-07 14:12:30 +00:00
string.c standardize various * conventions 2006-09-06 17:27:19 +00:00
syscall.c refactor syscall code 2006-09-07 14:13:26 +00:00
syscall.h refactor syscall code 2006-09-07 14:13:26 +00:00
sysfile.c fix ide, pit interfaces 2006-09-07 15:29:54 +00:00
sysproc.c refactor syscall code 2006-09-07 14:13:26 +00:00
trap.c no recursive interrupts 2006-09-07 16:53:16 +00:00
trapasm.S standardize various * conventions 2006-09-06 17:27:19 +00:00
traps.h more comments 2006-09-07 14:12:30 +00:00
types.h uint32_t -> uint &c 2006-07-20 09:07:53 +00:00
ulib.c break single-line if statements 2006-09-06 17:57:47 +00:00
umalloc.c standardize various * conventions 2006-09-06 17:27:19 +00:00
user.h standardize various * conventions 2006-09-06 17:27:19 +00:00
usertests.c remove bogus test 2006-09-07 15:31:40 +00:00
usys.S standardize various * conventions 2006-09-06 17:27:19 +00:00
vectors.pl no /* */ comments 2006-09-06 17:50:20 +00:00
x86.h more comments 2006-09-07 14:12:30 +00:00

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 x86-based multiprocessor using ANSI C.

xv6 is inspired by John Lions' Commentary on UNIX 6th Edition (Peer
to Peer Communications; ISBN: 1-57398-013-7; 1st edition (June 14,
2000)). See also http://pdos.csail.mit.edu/6.828/2006/v6.html, 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 (bootother.S, mp.h, mp.c, ioapic.h, lapic.c)
    FreeBSD (ioapic.c)
    NetBSD (console.c)

The following people made contributions:
    Russ Cox (context switching, locking)
    Cliff Frey (MP)
    Xiao Yu (MP)

If you spot errors or have suggestions for improvement, please send
email to Frans Kaashoek and Robert Morris
({kaashoek,rtm}@csail.mit.edu).  This version is the very first one,
so don't be surprised if there are errors or the code is unclear.

The code in the files that constitute xv6 are copyrighted, 2006, Frans
Kaashoek, Robert Morris, and Russ Cox.