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intc/ibex_plic: Clear interrupts that occur during claim process 

Previously if an interrupt occured during the claim process (after the
interrupt is claimed but before it's completed) it would never be
cleared.
This patch ensures that we also clear the hidden_pending bits as well.

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
Tested-by: Jackie Ke <jackieke724@hotmail.com>
Message-id: 4e9786084a86f220689123cc8a7837af8fa071cf.1607100423.git.alistair.francis@wdc.com
This commit is contained in:
Alistair Francis 2020-12-04 08:47:37 -08:00
parent 529577457c
commit 54a581c228
1 changed files with 10 additions and 3 deletions
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13
hw/intc/ibex_plic.c
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@ -43,16 +43,23 @@ static void ibex_plic_irqs_set_pending(IbexPlicState *s, int irq, bool level)
{
int pending_num = irq / 32;
if (!level) {
/*
* If the level is low make sure we clear the hidden_pending.
*/
s->hidden_pending[pending_num] &= ~(1 << (irq % 32));
}
if (s->claimed[pending_num] & 1 << (irq % 32)) {
/*
* The interrupt has been claimed, but not completed.
* The pending bit can't be set.
* Save the pending level for after the interrupt is completed.
*/
s->hidden_pending[pending_num] |= level << (irq % 32);
return;
} else {
s->pending[pending_num] |= level << (irq % 32);
}
s->pending[pending_num] |= level << (irq % 32);
}
static bool ibex_plic_irqs_pending(IbexPlicState *s, uint32_t context)