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C 86.1%
Assembly 3.7%
Makefile 3.4%
Shell 2.5%
Perl 2.3%
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kaashoek f70172129c run without lapic and ioapic, if they are not present 
if no lapic available, use 8253pit for clock
now xv6 runs both on qemu (uniprocessor) and bochs (uniprocessor and MP)
2006-09-07 01:37:58 +00:00
.cvsignore New formatting scripts. 2006-09-05 15:50:55 +00:00
8253pit.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
asm.h wrap long lines 2006-09-06 19:08:14 +00:00
bio.c wrap long lines 2006-09-06 19:08:14 +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 run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
defs.h run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
dev.h standardize various * conventions 2006-09-06 17:27:19 +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 tabs go away 2006-09-06 17:53:15 +00:00
fcntl.h low-level keyboard input (not hooked up to /dev yet) 2006-08-10 02:07:10 +00:00
file.c fd_* => file_* 2006-09-06 18:43:45 +00:00
file.h fd.* -> file.* 2006-09-06 18:40:28 +00:00
fs.c wrap long lines 2006-09-06 19:08:14 +00:00
fs.h inode addrs[NDIRECT] -> NADDRS 2006-08-25 01:11:30 +00:00
fstests.c standardize various * conventions 2006-09-06 17:27:19 +00:00
fsvar.h inode addrs[NDIRECT] -> NADDRS 2006-08-25 01:11:30 +00:00
ide.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +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 writeable => writable 2006-09-06 18:06:04 +00:00
lapic.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
ls.c wrap long lines 2006-09-06 19:08:14 +00:00
main.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
Makefile run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
mkdir.c standardize various * conventions 2006-09-06 17:27:19 +00:00
mkfs.c standardize various * conventions 2006-09-06 17:27:19 +00:00
mmu.h wrap long lines 2006-09-06 19:08:14 +00:00
mp.c run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +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 run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +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 fd_* => file_* 2006-09-06 18:43:45 +00:00
proc.h struct fd -> struct file 2006-09-06 18:38:56 +00:00
README nits 2006-09-04 11:52:36 +00:00
rm.c standardize various * conventions 2006-09-06 17:27:19 +00:00
runoff runoff fixes 2006-09-06 19:43:59 +00:00
runoff.list run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +00:00
setjmp.S runoff tweaks 2006-09-06 19:22:24 +00:00
sh.c what is NULL? 2006-09-06 18:21:54 +00:00
sign.pl spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 17:04:06 +00:00
spinlock.c wrap long lines 2006-09-06 19:08:14 +00:00
spinlock.h clean up stale error checks and panics 2006-08-29 14:45:45 +00:00
stat.h fstat 2006-08-12 04:33:50 +00:00
string.c standardize various * conventions 2006-09-06 17:27:19 +00:00
syscall.c for vs while 2006-09-06 18:47:51 +00:00
syscall.h struct fd -> struct file 2006-09-06 18:38:56 +00:00
sysfile.c wrap long lines 2006-09-06 19:08:14 +00:00
sysproc.c fd.* -> file.* 2006-09-06 18:40:28 +00:00
trap.c wrap long lines 2006-09-06 19:08:14 +00:00
trapasm.S standardize various * conventions 2006-09-06 17:27:19 +00:00
traps.h run without lapic and ioapic, if they are not present 2006-09-07 01:37:58 +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
user1.c nitpicks 2006-07-17 01:25:22 +00:00
userfs.c wrap long lines 2006-09-06 19:08:14 +00:00
usertests.c standardize various * conventions 2006-09-06 17:27:19 +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 no /* */ comments 2006-09-06 17:50:20 +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.