Imbus/xv6-riscv-kernel
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265 commits

Author SHA1 Message Date
Frans Kaashoek
d4cecb269f kvmmake() makes a complete kernel page table, matching Figure 3.3 2020-10-14 20:28:16 -04:00
Fumiya Shigemitsu
93378618df Fix minor typos 2020-10-14 20:28:14 -04:00
Robert Morris
bebecfd6fd more explicable scratch area size for machine-mode timer interrupts 2020-10-05 19:30:27 -04:00
Frans Kaashoek
c199afe4c8 Don't map the CLINT, since it never used in the kernel in supervisor mode 2020-10-05 19:30:27 -04:00
Robert Morris
c61cc69413 eliminate virtio DMA into kernel stacks. 2020-10-05 19:30:27 -04:00
Robert Morris
3092fe2c9e improve virtio_disk comments; bring it closer to wording in the spec 2020-10-05 19:30:27 -04:00
Robert Morris
548ffc97e1 don't unpin if recovering -- the resulting negative refcnt suppresses next unpin 2020-10-05 19:30:27 -04:00
Robert Morris
aeaf610c67 avoid deadlock by disk intr acking interrupt first, then processing ring 2020-10-05 19:30:27 -04:00
Fumiya Shigemitsu
9c8d1e2909 Fix minor typos 2020-10-03 16:36:20 -04:00
Frans Kaashoek
f2827b2c7b Clarify CLINT and PLIC acronym 2020-10-03 16:36:20 -04:00
Frans Kaashoek
6750608824 When either_copyin/out fails, return an error from write/read 
Add a test to check that read/write return an error
 2020-10-03 16:36:20 -04:00
Matt Harvey
6781ac0036
Corrects order of UART RX/TX interrupt enable bits 
(per http://byterunner.com/16550.html and manually tested in qemu bare metal echo)
 2020-09-14 14:49:57 -07:00
Robert Morris
490f91ab53 move panicked check to uart.c 2020-08-28 09:00:41 -04:00
Robert Morris
748809e1b3 suppress write() output after panic() 2020-08-28 09:00:41 -04:00
Frans Kaashoek
0bb2533f73 Adjust a few prototypes to be explicit that they don't take arguments 2020-08-21 11:00:45 -04:00
Robert Morris
5860dcd07d usertest for exec() out of memory recovery 
and fix a few exec() bugs
 2020-08-21 11:00:45 -04:00
Robert Morris
95dad4c061 x 2020-08-17 08:18:23 -04:00
Robert Morris
f2ec6777bd fix a bug in the out-of-memory handling code in exec 2020-08-17 08:18:23 -04:00
Robert Morris
8dc71a257d handle another out-of-memory in fork(). the policy here is not consistent, 
since other calls (e.g. exec()) panic on out of memory.
 2020-08-17 08:18:23 -04:00
Robert Morris
bc51626aab try to handle a few of the possible out-of-memory errors in fork() 2020-08-17 08:18:23 -04:00
Robert Morris
a8dd44cf59 modify uvmunmap() to be in aligned pages 
fix a bug in fork() recovering from out of memory
 2020-08-17 08:18:23 -04:00
Robert Morris
e283514ad0 pa isn't needed in the uvmunmap() loop 2020-08-17 08:18:23 -04:00
Frans Kaashoek
5dace67371 Typo (thanks yt <jaichenhengjie@qq.com>) 2020-08-10 16:43:33 -04:00
Frans Kaashoek
0502342335
Merge pull request #9 from d0iasm/riscv 
update initcode to avoid using the compressed extension
 2020-08-10 13:54:58 -04:00
Frans Kaashoek
93ca5550b8
Merge pull request #10 from takahirox/VirtioInterruptAck 
Write virtio interrupt ack register in virtio_disk_intr()
 2020-08-10 13:24:57 -04:00
Frans Kaashoek
d28c5d9837
Merge pull request #6 from jrrk2/riscv 
Update ramdisk.c
 2020-08-10 13:14:14 -04:00
Frans Kaashoek
c31d35d803
Merge branch 'riscv' into riscv 2020-08-10 13:05:17 -04:00
Robert Morris
e3b7058907 streamline copyin/copyout code in usertests 
fix bugs in read/write return values when there's an error
 2020-08-10 11:19:10 -04:00
Frans Kaashoek
1f555198d6 Change tf -> trapframe in a few comments 2020-08-10 11:19:10 -04:00
Robert Morris
7f35d7a14e modify each page in usertests countfree() 
get rid of static for walk() and freewalk()
 2020-08-10 11:19:10 -04:00
Robert Morris
2ae9c8e272 defines for UART register bits 2020-08-10 11:19:10 -04:00
Robert Morris
0f50e9527c fix printf() in interrupts 2020-08-10 11:19:10 -04:00
Robert Morris
27057bc9b4 interrupt-driven uart output, hopefully a nice example for teaching. 2020-08-10 11:19:10 -04:00
Robert Morris
1e72d5ca08 cpu->scheduler -> cpu->context to reduce confusion 2020-08-10 11:19:10 -04:00
Robert Morris
5494c91705 rename p->tf to p->trapframe, for consistency with p->context 2020-08-10 11:19:10 -04:00
Robert Morris
af9eb9114c make "echo hello > x" truncate file x. 2020-08-10 11:19:10 -04:00
Takahiro
7a5fcb28b3 Write interrupt ack register in virtio_disk_intr() 2020-04-18 14:49:54 -07:00
Asami Doi
8b052656a0 update initcode to avoid using the compressed extension 2020-03-20 12:33:32 +09:00
Jonathan Kimmitt
2b040aa379
Update ramdisk.c 
The qemu syntax for a ram disk was documented incorrectly. The documented syntax is here:
https://qemu.weilnetz.de/doc/qemu-doc.html
 2020-01-16 15:05:27 +00:00
Robert Morris
028af27646 mention LRU list a bit more in comments. 2019-10-29 04:32:55 -04:00
Robert Morris
e7ffb74ad1 fix a potential memory leak 2019-10-27 13:36:46 -04:00
Robert Morris
d9160fb4b9 nits 2019-10-27 08:03:19 -04:00
Anish Athalye
f2ab0eb644 Clean up linker script 
This patch does the following:

- Add .text.* to the .text section in the output
- Add an assertion that the trampoline does not overflow a page
- Add the .rodata section
- Make .sdata and .sdata.* (which is for small data) be absorbed into
  the .data section, because we don't need to distinguish between them;
  this prevents .sdata from appearing in the output
- Make the analogous change for .srodata and .sbss
- Make all the data sections 16-byte aligned

This patch also updates the .editorconfig for *.ld files.
 2019-10-21 22:27:18 -04:00
Fumiya Shigemitsu
90eb90b5e2 Fix minor typos 2019-10-21 21:01:07 +09:00
Robert Morris
2821d43cc9 nits 2019-10-16 12:27:08 -04:00
Robert Morris
56583b1402 updated alarmtest 2019-10-03 15:02:19 -04:00
Robert Morris
deaff5d8a6 no buf->qnext 2019-09-24 14:41:51 -04:00
Xi Wang
9ead904afe fix major validation 
fileread/filewrite should validate major to avoid buffer overflows
or bogus function pointers.
 2019-09-23 20:01:56 -04:00
Robert Morris
37df68e5de story is more complex than I thought. 2019-09-23 07:24:41 -04:00
Robert Morris
d175beadf5 bug fix: reparent() sometimes deadlocked 
bug fix: exit() sometimes released a different parent lock than it acquired
usertests
 2019-09-23 06:50:25 -04:00