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author | Alexander Graf <agraf@suse.de> | 2014-09-24 12:32:17 +0200 |
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committer | Alexander Graf <agraf@suse.de> | 2014-11-04 23:26:14 +0100 |
commit | b797318666dade9675a253d311125ae7b568e2f8 (patch) | |
tree | 2168ef91b1a20267ec70cc164a14a54a303d585c /hw/core/sysbus.c | |
parent | 33cd52b5d7b9adfd009e95f07e6c64dd88ae2a31 (diff) | |
download | qemu-b797318666dade9675a253d311125ae7b568e2f8.zip qemu-b797318666dade9675a253d311125ae7b568e2f8.tar.gz qemu-b797318666dade9675a253d311125ae7b568e2f8.tar.bz2 |
sysbus: Expose IRQ enumeration helpers
Sysbus devices can get their IRQ lines connected to other devices. It is
possible to figure out which IRQ line a connection is on and whether a sysbus
device even provides an IRQ connector at a specific offset.
This patch exposes helpers to make this information publicly accessible. We
will need it for the platform bus dynamic sysbus enumeration.
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'hw/core/sysbus.c')
-rw-r--r-- | hw/core/sysbus.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/hw/core/sysbus.c b/hw/core/sysbus.c index 7bfe381..945dec5 100644 --- a/hw/core/sysbus.c +++ b/hw/core/sysbus.c @@ -84,6 +84,27 @@ static const TypeInfo system_bus_info = { .class_init = system_bus_class_init, }; +/* Check whether an IRQ source exists */ +bool sysbus_has_irq(SysBusDevice *dev, int n) +{ + char *prop = g_strdup_printf("%s[%d]", SYSBUS_DEVICE_GPIO_IRQ, n); + ObjectProperty *r; + + r = object_property_find(OBJECT(dev), prop, NULL); + return (r != NULL); +} + +bool sysbus_is_irq_connected(SysBusDevice *dev, int n) +{ + return !!sysbus_get_connected_irq(dev, n); +} + +qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n) +{ + DeviceState *d = DEVICE(dev); + return qdev_get_gpio_out_connector(d, SYSBUS_DEVICE_GPIO_IRQ, n); +} + void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq) { qdev_connect_gpio_out_named(DEVICE(dev), SYSBUS_DEVICE_GPIO_IRQ, n, irq); |