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| author | Robert Morris <[email protected]> | 2019-07-27 05:47:19 -0400 |
|---|---|---|
| committer | Robert Morris <[email protected]> | 2019-07-27 05:47:19 -0400 |
| commit | a33f60fea30c931207aa05c933dab4bd992a40c2 (patch) | |
| tree | 95b86005813fb780887e9c81ebe60753c2de6a06 /kernel/trap.c | |
| parent | cf48b24c03325a4489e5dea9e2419893b7bf8783 (diff) | |
| download | xv6-labs-a33f60fea30c931207aa05c933dab4bd992a40c2.tar.gz xv6-labs-a33f60fea30c931207aa05c933dab4bd992a40c2.tar.bz2 xv6-labs-a33f60fea30c931207aa05c933dab4bd992a40c2.zip | |
console/uart tweaks
Diffstat (limited to 'kernel/trap.c')
| -rw-r--r-- | kernel/trap.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/trap.c b/kernel/trap.c index 53d86ca..ec57bed 100644 --- a/kernel/trap.c +++ b/kernel/trap.c @@ -180,7 +180,9 @@ devintr() if((scause & 0x8000000000000000L) && (scause & 0xff) == 9){ - // supervisor external interrupt, via PLIC. + // this is a supervisor external interrupt, via PLIC. + + // irq indicates which device interrupted. int irq = plic_claim(); if(irq == UART0_IRQ){ |