diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/openpic.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/hw/openpic.c b/hw/openpic.c index 25d5cd7..3cbcea8 100644 --- a/hw/openpic.c +++ b/hw/openpic.c @@ -169,6 +169,7 @@ typedef struct IRQ_queue_t { uint32_t queue[BF_WIDTH(MAX_IRQ)]; int next; int priority; + int pending; /* nr of pending bits in queue */ } IRQ_queue_t; typedef struct IRQ_src_t { @@ -251,11 +252,13 @@ static void openpic_irq_raise(OpenPICState *opp, int n_CPU, IRQ_src_t *src); static inline void IRQ_setbit(IRQ_queue_t *q, int n_IRQ) { + q->pending++; set_bit(q->queue, n_IRQ); } static inline void IRQ_resetbit(IRQ_queue_t *q, int n_IRQ) { + q->pending--; reset_bit(q->queue, n_IRQ); } @@ -271,6 +274,12 @@ static void IRQ_check(OpenPICState *opp, IRQ_queue_t *q) next = -1; priority = -1; + + if (!q->pending) { + /* IRQ bitmap is empty */ + goto out; + } + for (i = 0; i < opp->max_irq; i++) { if (IRQ_testbit(q, i)) { DPRINTF("IRQ_check: irq %d set ipvp_pr=%d pr=%d\n", @@ -281,6 +290,8 @@ static void IRQ_check(OpenPICState *opp, IRQ_queue_t *q) } } } + +out: q->next = next; q->priority = priority; } |