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[Qemu-devel] [PATCH v2 1/7] allwinner-a10-pic: set vector address when a
From: |
Beniamino Galvani |
Subject: |
[Qemu-devel] [PATCH v2 1/7] allwinner-a10-pic: set vector address when an interrupt is pending |
Date: |
Sun, 2 Mar 2014 15:06:35 +0100 |
This patch implements proper updating of the vector register which
should hold, according to the A10 user manual, the vector address for
the interrupt currently active on the CPU IRQ input.
Interrupt priority is not implemented at the moment and thus the first
pending interrupt is returned.
Signed-off-by: Beniamino Galvani <address@hidden>
---
hw/intc/allwinner-a10-pic.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/hw/intc/allwinner-a10-pic.c b/hw/intc/allwinner-a10-pic.c
index 407d563..00f3c11 100644
--- a/hw/intc/allwinner-a10-pic.c
+++ b/hw/intc/allwinner-a10-pic.c
@@ -23,11 +23,20 @@
static void aw_a10_pic_update(AwA10PICState *s)
{
uint8_t i;
- int irq = 0, fiq = 0;
+ int irq = 0, fiq = 0, pending;
+
+ s->vector = 0;
for (i = 0; i < AW_A10_PIC_REG_NUM; i++) {
irq |= s->irq_pending[i] & ~s->mask[i];
fiq |= s->select[i] & s->irq_pending[i] & ~s->mask[i];
+
+ if (!s->vector) {
+ pending = ffs(s->irq_pending[i] & ~s->mask[i]);
+ if (pending) {
+ s->vector = (i * 32 + pending - 1) * 4;
+ }
+ }
}
qemu_set_irq(s->parent_irq, !!irq);
@@ -84,9 +93,6 @@ static void aw_a10_pic_write(void *opaque, hwaddr offset,
uint64_t value,
uint8_t index = (offset & 0xc) / 4;
switch (offset) {
- case AW_A10_PIC_VECTOR:
- s->vector = value & ~0x3;
- break;
case AW_A10_PIC_BASE_ADDR:
s->base_addr = value & ~0x3;
case AW_A10_PIC_PROTECT:
--
1.7.10.4
- [Qemu-devel] [PATCH v2 0/7] Allwinner A10 fixes, Beniamino Galvani, 2014/03/02
- [Qemu-devel] [PATCH v2 1/7] allwinner-a10-pic: set vector address when an interrupt is pending,
Beniamino Galvani <=
- [Qemu-devel] [PATCH v2 4/7] allwinner-a10-pit: use level triggered interrupts, Beniamino Galvani, 2014/03/02
- [Qemu-devel] [PATCH v2 5/7] allwinner-a10-pit: implement prescaler and source selection, Beniamino Galvani, 2014/03/02
- [Qemu-devel] [PATCH v2 6/7] allwinner-emac: set autonegotiation complete bit on link up, Beniamino Galvani, 2014/03/02
- [Qemu-devel] [PATCH v2 7/7] allwinner-emac: update irq status after writes to interrupt registers, Beniamino Galvani, 2014/03/02