From: Michel Pollet <buserror@gmail.com>
Date: Thu, 15 Mar 2012 14:16:34 +0000 (+0000)
Subject: irq: Added an INIT flag
X-Git-Tag: v1.0b1~21
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=8528e582c4124634376de162bd7b949de39c1603;p=sx%2Fsimavr.git

irq: Added an INIT flag

'filtered' interrupts didn't work if the initial value was the same as the
one used to raise the irq. Now it works properly, can could also be used
to track IRQs in the pool by usage.

Signed-off-by: Michel Pollet <buserror@gmail.com>
---

diff --git a/simavr/sim/sim_irq.c b/simavr/sim/sim_irq.c
index 0e4c56e..68d218b 100644
--- a/simavr/sim/sim_irq.c
+++ b/simavr/sim/sim_irq.c
@@ -71,6 +71,7 @@ avr_init_irq(
 
 	for (int i = 0; i < count; i++) {
 		irq[i].irq = base + i;
+		irq[i].flags = IRQ_FLAG_INIT;
 		if (pool)
 			_avr_irq_pool_add(pool, &irq[i]);
 		if (names && names[i])
@@ -185,8 +186,11 @@ avr_raise_irq(
 	if (!irq)
 		return ;
 	uint32_t output = (irq->flags & IRQ_FLAG_NOT) ? !value : value;
-	if (irq->value == output && (irq->flags & IRQ_FLAG_FILTERED))
+	// if value is the same but it's the first time, raise it anyway
+	if (irq->value == output &&
+			(irq->flags & IRQ_FLAG_FILTERED) && !(irq->flags & IRQ_FLAG_INIT))
 		return;
+	irq->flags &= ~IRQ_FLAG_INIT;
 	avr_irq_hook_t *hook = irq->hook;
 	while (hook) {
 		avr_irq_hook_t * next = hook->next;
diff --git a/simavr/sim/sim_irq.h b/simavr/sim/sim_irq.h
index d75c8e7..ed2d5e5 100644
--- a/simavr/sim/sim_irq.h
+++ b/simavr/sim/sim_irq.h
@@ -55,6 +55,7 @@ enum {
 	IRQ_FLAG_NOT		= (1 << 0),	//!< change polarity of the IRQ
 	IRQ_FLAG_FILTERED	= (1 << 1),	//!< do not "notify" if "value" is the same as previous raise
 	IRQ_FLAG_ALLOC		= (1 << 2), //!< this irq structure was malloced via avr_alloc_irq
+	IRQ_FLAG_INIT		= (1 << 3), //!< this irq hasn't been used yet
 };
 
 /*