diff options
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){ |