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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
2020-11-03oopsRobert Morris1-1/+1
2020-11-03Frans' proc_lock.Robert Morris2-77/+34
2020-11-01free proc if kalloc failsRobert Morris1-0/+1
2020-10-23hopefully make writei more correctRobert Morris2-13/+14
2020-10-22test for closed pipe or killed on every char, not just if pipe fullRobert Morris1-11/+14
2020-10-20fix uart.c to work with UART_TX_BUF_SIZE == 1Robert Morris1-7/+7
2020-10-20Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscvRobert Morris3-28/+48
2020-10-20consolewrite does not need cons.lock -- can lead to sleep() with lock heldRobert Morris1-2/+0
2020-10-14Fix minor typosFumiya Shigemitsu1-1/+1
2020-10-14kvmmake() makes a complete kernel page table, matching Figure 3.3Frans Kaashoek3-27/+47
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
2020-10-04don't unpin if recovering -- the resulting negative refcnt suppresses next unpinRobert Morris1-4/+5
2020-10-04avoid deadlock by disk intr acking interrupt first, then processing ringRobert Morris1-17/+34
2020-10-03Corrects 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)
2020-10-03Fix minor typosFumiya Shigemitsu1-1/+1
2020-10-03Clarify CLINT and PLIC acronymFrans Kaashoek1-2/+2
2020-09-24When either_copyin/out fails, return an error from write/readFrans Kaashoek1-0/+2
Add a test to check that read/write return an error
2020-08-28move 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
2020-08-19usertest for exec() out of memory recoveryRobert Morris2-4/+5
and fix a few exec() bugs
2020-08-15xRobert Morris1-12/+6
2020-08-13fix a bug in the out-of-memory handling code in execRobert Morris2-5/+5
2020-08-13handle 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.
2020-08-13try to handle a few of the possible out-of-memory errors in fork()Robert Morris1-5/+18
2020-08-13modify uvmunmap() to be in aligned pagesRobert Morris2-21/+18
fix a bug in fork() recovering from out of memory
2020-08-13Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscvRobert Morris5-11/+12
2020-08-13pa isn't needed in the uvmunmap() loopRobert Morris1-3/+1
2020-08-10Typo (thanks yt <jaichenhengjie@qq.com>)Frans Kaashoek1-1/+1
2020-08-10update initcode to avoid using the compressed extensionAsami Doi1-7/+7
2020-08-10Write interrupt ack register in virtio_disk_intr()Takahiro1-0/+1
2020-08-10Update ramdisk.cJonathan Kimmitt1-1/+1
The qemu syntax for a ram disk was documented incorrectly. The documented syntax is here: https://qemu.weilnetz.de/doc/qemu-doc.html
2020-08-10Fix minor typosFumiya Shigemitsu1-2/+2
2020-08-07streamline copyin/copyout code in usertestsRobert Morris3-3/+3
fix bugs in read/write return values when there's an error
2020-08-07Merge branch 'riscv' of g.csail.mit.edu:xv6-dev into riscvRobert Morris1-6/+6
2020-08-07modify each page in usertests countfree()Robert Morris3-8/+7
get rid of static for walk() and freewalk()
2020-08-06Change tf -> trapframe in a few commentsFrans Kaashoek1-6/+6
2020-07-23defines for UART register bitsRobert Morris1-13/+21
2020-07-22fix printf() in interruptsRobert Morris3-25/+29
2020-07-20interrupt-driven uart output, hopefully a nice example for teaching.Robert Morris5-18/+100
2020-07-17cpu->scheduler -> cpu->context to reduce confusionRobert Morris2-3/+3
2020-07-17rename p->tf to p->trapframe, for consistency with p->contextRobert Morris6-30/+30
2020-07-16make "echo hello > x" truncate file x.Robert Morris4-7/+9
2019-10-29mention LRU list a bit more in comments.Robert Morris1-3/+5
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