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2022-08-09Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscvRobert Morris2-8/+0
2022-08-09commentRobert Morris1-0/+1
2022-08-09sscratch cleanupRobert Morris2-8/+0
2022-08-09adopt github PR98 (No need to store TRAPFRAME in sscratch register)Robert Morris3-26/+31
2022-08-08tweak virtio commentsRobert Morris2-4/+4
2021-10-17port virtio_disk to virtio spec 1.0+Xi Wang2-37/+51
The legacy interface is confusing. It's better to make virtio_disk conform to the virtio spec. This is supported in QEMU since 4.2 by disabling force-legacy for virtio-mmio.
2021-09-01memmove(dst, src, 0) leads to overflow in `while(n-- > 0)` as `n` is uint64 ↵Frans Kaashoek1-0/+3
(thanks Matúš Jókay <[email protected]>)
2021-08-31fix ld warning: undefined symbol _entryyzhu1-0/+1
2021-08-31commentPavan Maddamsetti1-1/+1
2021-08-31exec() only accepts MAXARG argumentsl0stman1-1/+1
The terminating NULL string is already included (see sys_exec()).
2021-08-31Assert that the size in mappages() is always positivel0stman1-1/+4
If va % PGSIZE == 0 and size == 0, we have last < a at the start of the loop so we might never terminate. That being said, this particular case couldn't be triggered for now.
2021-08-31Change `inode cache` in main.c to `inode table`kimjungwow1-1/+1
2021-08-31I fixed a typo in the comment.amane-uehara1-1/+1
2021-08-31Remove setproc prototypeOptimisticSide1-1/+0
2021-08-31fix comment for 'sepc'Vadim Kolontsov1-1/+1
2021-08-31fix typos in user/usertest.c & kernel/log.cFIXED-TERM Chen Ian (BT-CO/QMM5)1-1/+1
2021-08-30Configure PMP at bootJonathan Behrens2-0/+17
2021-08-10check for alignment just onceRobert Morris1-4/+1
2020-11-23Rename icache to itableFrans Kaashoek1-25/+25
The inode cache isn't really a cache. The main purpose of it is to allow for synchronization (locking individual inodes), providing long-lived references to inodes, and ensuring that there is only inode in memory.
2020-11-05Be principled: acquire lock firstFrans Kaashoek1-1/+1
2020-11-05proc_tree_lock -> wait_lockRobert Morris1-14/+15
2020-11-05don't over-lock in exit()Robert Morris2-3/+7
2020-11-05oopsRobert Morris1-1/+1
2020-11-05Frans' proc_lock.Robert Morris2-77/+34
2020-11-05free proc if kalloc failsRobert Morris1-0/+1
2020-11-05hopefully make writei more correctRobert Morris2-13/+14
2020-11-05test for closed pipe or killed on every char, not just if pipe fullRobert Morris1-11/+14
2020-11-05fix uart.c to work with UART_TX_BUF_SIZE == 1Robert Morris1-7/+7
2020-11-05consolewrite does not need cons.lock -- can lead to sleep() with lock heldRobert Morris1-2/+0
2020-10-14kvmmake() makes a complete kernel page table, matching Figure 3.3Frans Kaashoek3-27/+47
2020-10-14Fix minor typosFumiya Shigemitsu1-1/+1
2020-10-05more explicable scratch area size for machine-mode timer interruptsRobert Morris2-12/+12
2020-10-05Don't map the CLINT, since it never used in the kernel in supervisor modeFrans Kaashoek1-3/+0
2020-10-05eliminate virtio DMA into kernel stacks.Robert Morris3-31/+12
2020-10-05improve virtio_disk comments; bring it closer to wording in the specRobert Morris2-37/+85
2020-10-05don't unpin if recovering -- the resulting negative refcnt suppresses next unpinRobert Morris1-4/+5
2020-10-05avoid deadlock by disk intr acking interrupt first, then processing ringRobert Morris1-17/+34
2020-10-03Fix minor typosFumiya Shigemitsu1-1/+1
2020-10-03Clarify CLINT and PLIC acronymFrans Kaashoek1-2/+2
2020-10-03When either_copyin/out fails, return an error from write/readFrans Kaashoek1-0/+2
Add a test to check that read/write return an error
2020-09-14Corrects order of UART RX/TX interrupt enable bitsMatt Harvey1-2/+2
(per http://byterunner.com/16550.html and manually tested in qemu bare metal echo)
2020-08-28move panicked check to uart.cRobert Morris3-14/+14
2020-08-28suppress write() output after panic()Robert Morris2-1/+7
2020-08-21Adjust a few prototypes to be explicit that they don't take argumentsFrans Kaashoek1-4/+4
2020-08-21usertest for exec() out of memory recoveryRobert Morris2-4/+5
and fix a few exec() bugs
2020-08-17xRobert Morris1-12/+6
2020-08-17fix a bug in the out-of-memory handling code in execRobert Morris2-5/+5
2020-08-17handle another out-of-memory in fork(). the policy here is not consistent,Robert Morris2-1/+4
since other calls (e.g. exec()) panic on out of memory.
2020-08-17try to handle a few of the possible out-of-memory errors in fork()Robert Morris1-5/+18
2020-08-17modify uvmunmap() to be in aligned pagesRobert Morris2-21/+18
fix a bug in fork() recovering from out of memory
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