f1bb53c690
The driver should free descriptors, not interrupt handler. This
...
avoids handler freeing descriptors before driver sees that the request
has completed.
2019-07-30 08:13:03 -04:00
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
47b9cfee49
separate out timer init code for clarity
2019-07-28 13:16:49 -04:00
1ec50c5848
xxx
2019-07-28 07:43:22 -04:00
6507da772d
argptr no longer needed, since copyin checks
2019-07-28 06:29:37 -04:00
629faafa36
cleaner UART register interface
2019-07-27 06:44:24 -04:00
a33f60fea3
console/uart tweaks
2019-07-27 05:47:19 -04:00
cf48b24c03
beautify console.c
2019-07-27 04:15:06 -04:00
281d450a08
split printf into a separate file, to make console.c more like a driver
2019-07-27 03:49:03 -04:00
cc1a303d09
fetchint isn't used any more
2019-07-26 12:34:06 -04:00
f0987d82dc
???
2019-07-26 11:09:54 -04:00
c714e3e35c
machinevec -> timervec
2019-07-26 10:17:02 -04:00
fa2e2e3c81
uservec before userret in trampoline, to match book and kernelvec
2019-07-26 09:38:22 -04:00
8d30e21b59
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-07-26 04:53:59 -04:00
ea95a6654c
trampin -> uservec
...
trampout -> userret
2019-07-26 04:53:46 -04:00
47c9721d78
a few name changes in panic msg
2019-07-25 06:59:07 -04:00
4e62de64cd
fix an exit/exit deadlock -> one more locking protocol violation
...
increase timer rate from 1/second to 10/second
2019-07-25 06:30:49 -04:00
b19adf79f9
purge x86 stuff from defs.h
2019-07-25 05:37:35 -04:00
5d5e4e065f
comments for timer setup
2019-07-25 05:35:03 -04:00
9a817bd134
rationalize some vm function names
2019-07-24 15:28:37 -04:00
da898a11b6
???
2019-07-24 14:40:13 -04:00
a77287e924
no more PAGEBREAK
2019-07-24 13:33:43 -04:00
b4f89bb529
ping-pong exercise
2019-07-24 10:39:05 -04:00
8f6865d1f1
display assembly instructions, to help with first.tex exercise
2019-07-24 10:15:45 -04:00
936afc6e1a
mstart -> start
2019-07-23 14:31:12 -04:00
54178ad94d
simplify kernel mapping calls
2019-07-23 12:17:17 -04:00
55bc96d419
a few core -> CPU
...
get rid of PDF generating support
2019-07-23 11:14:10 -04:00
b8a31c494c
one more TRAMPOLINE
2019-07-23 07:30:23 -04:00
6c78af4a57
fix mapkstack
2019-07-22 20:58:15 -04:00
b2e9c8eea5
Clear U bit for second stack page so that it functions as a guard page
2019-07-22 15:38:08 -04:00
38b430687c
nit
2019-07-22 15:04:07 -04:00
6b379e4707
-MD and TRAPFRAME
2019-07-22 14:54:40 -04:00
5eab649255
Allocate 2 pages per proc, with the top one unmapped.
...
The page below the last proc is unmapped by default (because the
kernel doesn't map anything right below the kernel stacks).
2019-07-22 14:30:45 -04:00
c5d48db045
Merge branch 'riscv-kstack' into riscv
2019-07-22 13:32:33 -04:00
328204d9cc
not much
2019-07-20 18:51:31 -04:00
06e49a58dc
pi for pipe, rather than p, to avoid confusion with proc's p->lock
2019-07-20 17:07:20 -04:00
3333665ab6
not much
2019-07-20 10:17:26 -04:00
2418ac380c
it's not clear that the release will always enable interrupts
2019-07-19 13:27:48 -04:00
06109901c9
x
2019-07-19 11:27:02 -04:00
dbd729b32d
with per-proc locks, we don't need the intr_on() inside the loop.
2019-07-19 10:20:02 -04:00
32168df609
no need to save/restore 14
2019-07-19 09:02:15 -04:00
9156632701
One way of supporting a guard page below kstack: allocate kstacks in
...
procinit() and map them high up (below TRAMPOLNE) with an empty
mapping below each stack. Never free a kernel stack.
Another way would be to allocate and map them dynamically, but then we
need to reload page table when switching processes in scheduler()
and/or have a kernel pagetable per proc (if we want k->stack to be the
same virtual address in each process).
One gotcha: kernel addresses are not equal to physical addresses for
stack addresses. A stack address must be translated if we need its
physical address (e.g., virtio passes a stack address to the disk).
2019-07-19 08:38:51 -04:00
b924e44f06
Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscv
2019-07-17 05:53:47 -04:00
ce53416f49
Delete x86 comment
2019-07-17 05:53:34 -04:00
ebc3937209
conservatively call sfence.vma before every satp load.
2019-07-16 17:02:21 -04:00
6bbc2b2245
cosmetic changes
2019-07-11 10:38:56 -04:00
7797a38423
another test, to help with locking exercises
2019-07-11 05:41:59 -04:00
4bc900e78b
nits
2019-07-10 14:54:34 -04:00
061e3be6f8
more comment cleanup
2019-07-10 10:13:08 -04:00
c0266a877a
document which proc fields are protected by p->lock
2019-07-10 09:28:00 -04:00
Frans Kaashoek