diff options
| -rw-r--r-- | hw/arm_gic.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/hw/arm_gic.c b/hw/arm_gic.c index 59eabcc..d8a7a19 100644 --- a/hw/arm_gic.c +++ b/hw/arm_gic.c @@ -819,6 +819,15 @@ static void gic_init(gic_state *s, int num_irq) hw_error("requested %u interrupt lines exceeds GIC maximum %d\n", num_irq, GIC_MAXIRQ); } + /* ITLinesNumber is represented as (N / 32) - 1 (see + * gic_dist_readb) so this is an implementation imposed + * restriction, not an architectural one: + */ + if (s->num_irq < 32 || (s->num_irq % 32)) { + hw_error("%d interrupt lines unsupported: not divisible by 32\n", + num_irq); + } + qdev_init_gpio_in(&s->busdev.qdev, gic_set_irq, s->num_irq - GIC_INTERNAL); for (i = 0; i < NUM_CPU(s); i++) { sysbus_init_irq(&s->busdev, &s->parent_irq[i]); |