Robert Morris
a5fbfe418a
clarify some FS comments
2011-10-11 06:41:37 -04:00
Frans Kaashoek
1ddfbbb194
Revert "Introduce and use sleeplocks instead of BUSY flags"
...
My changes have a race with re-used bufs and the code doesn't seem to get shorter
Keep the changes that fixed ip->off race
This reverts commit 3a5fa7ed90
2011-08-29 17:18:40 -04:00
Frans Kaashoek
3a5fa7ed90
Introduce and use sleeplocks instead of BUSY flags
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Remove I_BUSY, B_BUSY, and intrans defs and usages
One spinlock per buf to avoid ugly loop in bget
fix race in filewrite (don't update f->off after releasing lock)
2011-08-26 10:08:29 -04:00
Frans Kaashoek
8a9b6dbd44
Make cross reference with text work
2011-08-25 14:39:09 -04:00
Frans Kaashoek
9aa0337dc1
Map kernel high
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Very important to give qemu memory through PHYSTOP :(
2011-07-29 07:31:27 -04:00
Russ Cox
cf4b1ad90b
xv6: formatting, cleanup, rev5 (take 2)
2011-02-19 21:17:55 -05:00
Russ Cox
1a81e38b17
make new code like old code
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Variable declarations at top of function,
separate from initialization.
Use == 0 instead of ! for checking pointers.
Consistent spacing around {, *, casts.
Declare 0-parameter functions as (void) not ().
Integer valued functions return -1 on failure, 0 on success.
2011-01-11 13:01:13 -05:00
Frans Kaashoek
40889627ba
Initial version of single-cpu xv6 with page tables
2010-07-02 14:51:53 -04:00
Russ Cox
48755214c9
assorted fixes:
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* rename c/cp to cpu/proc
* rename cpu.context to cpu.scheduler
* fix some comments
* formatting for printout
2009-08-30 23:02:08 -07:00
rsc
34295f461a
group locks into structs they protect.
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few naming nits.
2009-05-31 05:12:21 +00:00
rsc
c47bc4fd54
ide.c: make names more regular
2009-05-31 01:29:01 +00:00
rsc
2157576107
be consistent: no underscores in function names
2009-03-08 22:07:13 +00:00
rtm
fbd8857d4d
make new Homework 8 work
2007-08-30 18:21:35 +00:00
rsc
eb52c7de1d
comments; rename irq_ to pic_
2007-08-28 19:04:36 +00:00
rsc
5516be1fed
spaces around else for rtm
2007-08-28 18:37:41 +00:00
rsc
c1b100e930
nits
2007-08-28 18:23:48 +00:00
rsc
2868ca0f37
comment non-check of cp->killed
2007-08-28 03:32:49 +00:00
rsc
558ab49f13
delete unnecessary #include lines
2007-08-27 23:26:33 +00:00
rsc
d003d232fc
Another attempt at the bio.c comment.
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Rename B_WRITE to B_DIRTY and then let ide.c
maintain the B_VALID and B_DIRTY flags.
2007-08-27 14:09:30 +00:00
rsc
d7b44dbcfc
minor cleanups
2007-08-24 22:17:41 +00:00
rtm
8e88f9e2c6
comment nits
2007-08-24 19:52:49 +00:00
rtm
902b13f5d6
simplify ide queuing
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nits in comments
2007-08-24 19:32:36 +00:00
rsc
8d0a83565a
formatting, sleep bug fix
2007-08-14 18:46:29 +00:00
rsc
29ff8d495c
ide_write unused => gone
2007-08-14 14:24:09 +00:00
rsc
50f8850366
move ide_intr lower
2006-09-08 14:33:27 +00:00
rsc
21eafd48e2
fix disk bug
2006-09-07 16:54:18 +00:00
rsc
19297caf0d
fix ide, pit interfaces
2006-09-07 15:29:54 +00:00
rsc
bb207a1d42
comments
2006-09-07 14:28:12 +00:00
kaashoek
f70172129c
run without lapic and ioapic, if they are not present
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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
rsc
96d467b3a9
more named constants
2006-09-06 17:54:29 +00:00
rsc
799c9176bc
more tabs go away
2006-09-06 17:53:15 +00:00
rsc
f552738889
no /* */ comments
2006-09-06 17:50:20 +00:00
rsc
9e9bcaf143
standardize various * conventions
2006-09-06 17:27:19 +00:00
rsc
a650c606fe
spacing fixes: no tabs, 2-space indents (for rtm)
2006-09-06 17:04:06 +00:00
kaashoek
7abf49d2f2
remove duplication
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don't use the same name for two different pieces of code
2006-09-03 15:39:29 +00:00
rtm
2aa4c3bc29
complain if no disk 1
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lots of cleanup
2006-08-30 18:55:06 +00:00
rtm
9e5970d596
link()
2006-08-13 02:12:44 +00:00
rtm
5be0039ce9
interrupts could be recursive since lapic_eoi() called before rti
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so fast interrupts overflow the kernel stack
fix: cli() before lapic_eoi()
2006-08-10 22:08:14 +00:00
rtm
8a8be1b8c3
low-level keyboard input (not hooked up to /dev yet)
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fix acquire() to cli() *before* incrementing nlock
make T_SYSCALL a trap gate, not an interrupt gate
sadly, various crashes if you hold down a keyboard key...
2006-08-10 02:07:10 +00:00
kaashoek
939f9edeac
iread for T_DEV
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O_RDWR, etc.
create file
2006-08-09 19:25:20 +00:00
rtm
0e84a0ec6e
fix race in holding() check in acquire()
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give cpu1 a TSS and gdt for when it enters scheduler()
and a pseudo proc[] entry for each cpu
cpu0 waits for each other cpu to start up
read() for files
2006-08-08 19:58:06 +00:00
kaashoek
104207726b
bwrite
2006-08-07 01:38:46 +00:00
kaashoek
8ec6530fee
generalize async read to support write too
2006-08-06 20:28:15 +00:00
kaashoek
c8b29f6d03
better interrupt plan---this one appears to work
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ioapic
2006-08-04 18:12:31 +00:00
rtm
32630628a9
open()
2006-07-29 09:35:02 +00:00
kaashoek
e46fb46fcf
acquire+release ide_lock in ide_intr
2006-07-29 01:20:15 +00:00
rtm
11a9947f1a
bread
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iget
mkfs makes a file system image
put this in your .bochsrc:
ata0-slave: type=disk, mode=flat, path="fs.img", cylinders=1024, heads=1, spt=1
2006-07-21 13:18:04 +00:00
rtm
2927081628
uint32_t -> uint &c
2006-07-20 09:07:53 +00:00
rsc
0dd4253747
add ide_lock for sleep
2006-07-17 05:00:25 +00:00
rsc
b5ee516575
add uint and standardize on typedefs instead of unsigned
2006-07-17 01:52:13 +00:00
