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25 commits

Author SHA1 Message Date
Robert Morris 63ef3b8c9f slightly better comments 2022-08-22 13:49:15 -04:00
Robert Morris 9fc9f755e1 adopt github PR98 (No need to store TRAPFRAME in sscratch register) 2022-08-09 11:44:02 -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 5494c91705 rename p->tf to p->trapframe, for consistency with p->context 2020-08-10 11:19:10 -04:00
Robert Morris d9160fb4b9 nits 2019-10-27 08:03:19 -04:00
Robert Morris 2df42355f7 all of PTE_FLAGS 2019-09-17 06:07:58 -04:00
Frans Kaashoek 7e6c37e67e Support exit status for exit/wait 
One test case for returning a exit status
Passes usertests, but haven't used it to simplify tests
 2019-09-10 12:30:10 -04:00
Robert Morris a33f60fea3 console/uart tweaks 2019-07-27 05:47:19 -04:00
Robert Morris f0987d82dc ??? 2019-07-26 11:09:54 -04:00
Robert Morris c714e3e35c machinevec -> timervec 2019-07-26 10:17:02 -04:00
Robert Morris fa2e2e3c81 uservec before userret in trampoline, to match book and kernelvec 2019-07-26 09:38:22 -04:00
Robert Morris ea95a6654c trampin -> uservec 
trampout -> userret
 2019-07-26 04:53:46 -04:00
Robert Morris 8f6865d1f1 display assembly instructions, to help with first.tex exercise 2019-07-24 10:15:45 -04:00
Robert Morris 54178ad94d simplify kernel mapping calls 2019-07-23 12:17:17 -04:00
Frans Kaashoek b8a31c494c one more TRAMPOLINE 2019-07-23 07:30:23 -04:00
Robert Morris 6bbc2b2245 cosmetic changes 2019-07-11 10:38:56 -04:00
Robert Morris 5eb1685700 have kill() lock before looking at p->pid 
document wait()'s use of np->parent w/o holding lock.
 2019-07-10 09:24:50 -04:00
Robert Morris 9981bb2270 tweak some comments. 2019-07-10 08:57:51 -04:00
Frans Kaashoek 1e4d7065d6 Merge branch 'riscv' into riscv-proc 2019-07-02 14:19:31 -04:00
Frans Kaashoek 67702cf706 Checkpoint switching to per-process locks, in attempt clarify xv6's 
locking plan, which is a difficult to understand because ptable lock
protects many invariants.  This implementation has a bug: once in a
while xv6 unlocks a proc lock that is locked by another core.
 2019-07-02 09:14:47 -04:00
Robert Morris 40f1041a0a don't enable interrupts until done with sstatus, scause, &c 2019-07-02 05:20:11 -04:00
Robert Morris 0498bfd159 timer interrupt in the kernel -> yield 2019-07-01 13:46:11 -04:00
Robert Morris ca39672a30 clean up virtio code 2019-06-13 09:40:17 -04:00
Robert Morris de9d72c908 virtio disk driver 2019-06-13 06:49:02 -04:00
Robert Morris 5753553213 separate source into kernel/ user/ mkfs/ 2019-06-11 09:57:14 -04:00
Renamed from trap.c (Browse further)