From 56583b1402a7f8fad0f8c3c296e26f12b1114c95 Mon Sep 17 00:00:00 2001 From: Robert Morris Date: Thu, 3 Oct 2019 15:02:19 -0400 Subject: updated alarmtest --- kernel/plic.c | 14 -------------- 1 file changed, 14 deletions(-) (limited to 'kernel/plic.c') diff --git a/kernel/plic.c b/kernel/plic.c index b569492..eed8316 100644 --- a/kernel/plic.c +++ b/kernel/plic.c @@ -28,20 +28,6 @@ plicinithart(void) *(uint32*)PLIC_SPRIORITY(hart) = 0; } -// return a bitmap of which IRQs are waiting -// to be served. -uint64 -plic_pending(void) -{ - uint64 mask; - - //mask = *(uint32*)(PLIC + 0x1000); - //mask |= (uint64)*(uint32*)(PLIC + 0x1004) << 32; - mask = *(uint64*)PLIC_PENDING; - - return mask; -} - // ask the PLIC what interrupt we should serve. int plic_claim(void) -- cgit v1.2.3 From 27057bc9b467db64a3de600f27d6fa3239a04c88 Mon Sep 17 00:00:00 2001 From: Robert Morris Date: Mon, 20 Jul 2020 06:59:26 -0400 Subject: interrupt-driven uart output, hopefully a nice example for teaching. --- kernel/plic.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'kernel/plic.c') diff --git a/kernel/plic.c b/kernel/plic.c index eed8316..5acba39 100644 --- a/kernel/plic.c +++ b/kernel/plic.c @@ -33,7 +33,6 @@ int plic_claim(void) { int hart = cpuid(); - //int irq = *(uint32*)(PLIC + 0x201004); int irq = *(uint32*)PLIC_SCLAIM(hart); return irq; } @@ -43,6 +42,5 @@ void plic_complete(int irq) { int hart = cpuid(); - //*(uint32*)(PLIC + 0x201004) = irq; *(uint32*)PLIC_SCLAIM(hart) = irq; } -- cgit v1.2.3