[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH v1 3/3] hw/intc: ibex_plic: Honour source priorities
From: |
Alistair Francis |
Subject: |
[PATCH v1 3/3] hw/intc: ibex_plic: Honour source priorities |
Date: |
Fri, 24 Jul 2020 22:34:45 -0700 |
This patch follows what commit aa4d30f6618dc "riscv: plic: Honour source
priorities" does and ensures that the highest priority interrupt will be
serviced first.
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Cc: Jessica Clarke <jrtc27@jrtc27.com>
---
hw/intc/ibex_plic.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/hw/intc/ibex_plic.c b/hw/intc/ibex_plic.c
index 669247ef08..f49fa67c91 100644
--- a/hw/intc/ibex_plic.c
+++ b/hw/intc/ibex_plic.c
@@ -57,6 +57,8 @@ static void ibex_plic_irqs_set_pending(IbexPlicState *s, int
irq, bool level)
static bool ibex_plic_irqs_pending(IbexPlicState *s, uint32_t context)
{
int i;
+ uint32_t max_irq = 0;
+ uint32_t max_prio = s->threshold;
for (i = 0; i < s->pending_num; i++) {
uint32_t irq_num = ctz64(s->pending[i]) + (i * 32);
@@ -66,14 +68,17 @@ static bool ibex_plic_irqs_pending(IbexPlicState *s,
uint32_t context)
continue;
}
- if (s->priority[irq_num] > s->threshold) {
- if (!s->claim) {
- s->claim = irq_num;
- }
- return true;
+ if (s->priority[irq_num] > max_prio) {
+ max_irq = irq_num;
+ max_prio = s->priority[irq_num];
}
}
+ if (max_irq) {
+ s->claim = max_irq;
+ return true;
+ }
+
return false;
}
--
2.27.0