From a33f60fea30c931207aa05c933dab4bd992a40c2 Mon Sep 17 00:00:00 2001 From: Robert Morris Date: Sat, 27 Jul 2019 05:47:19 -0400 Subject: console/uart tweaks --- kernel/trap.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'kernel/trap.c') 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){ -- cgit v1.2.3