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[Qemu-ppc] [PATCH v3 3/7] sysbus: Expose IRQ enumeration helpers
From: |
Alexander Graf |
Subject: |
[Qemu-ppc] [PATCH v3 3/7] sysbus: Expose IRQ enumeration helpers |
Date: |
Wed, 24 Sep 2014 17:22:19 +0200 |
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 <address@hidden>
---
hw/core/qdev.c | 11 +++++++++++
hw/core/sysbus.c | 21 +++++++++++++++++++++
include/hw/qdev-core.h | 1 +
include/hw/sysbus.h | 3 +++
4 files changed, 36 insertions(+)
diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index 1cdd052..c9b7a68 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -411,6 +411,17 @@ void qdev_connect_gpio_out_named(DeviceState *dev, const
char *name, int n,
g_free(propname);
}
+qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int n)
+{
+ char *propname = g_strdup_printf("%s[%d]",
+ name ? name : "unnamed-gpio-out", n);
+
+ qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
+ NULL);
+
+ return ret;
+}
+
/* disconnect a GPIO ouput, returning the disconnected input (if any) */
static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
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);
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 77b193b..b0eaee8 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -273,6 +273,7 @@ qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const
char *name, int n);
void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
qemu_irq pin);
+qemu_irq qdev_get_gpio_out_connector(DeviceState *dev, const char *name, int
n);
qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
const char *name, int n);
diff --git a/include/hw/sysbus.h b/include/hw/sysbus.h
index 6c618e6..6b3d336 100644
--- a/include/hw/sysbus.h
+++ b/include/hw/sysbus.h
@@ -67,7 +67,10 @@ void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice
*target);
void sysbus_init_ioports(SysBusDevice *dev, pio_addr_t ioport, pio_addr_t
size);
+bool sysbus_has_irq(SysBusDevice *dev, int n);
void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
+bool sysbus_is_irq_connected(SysBusDevice *dev, int n);
+qemu_irq sysbus_get_connected_irq(SysBusDevice *dev, int n);
void sysbus_mmio_map(SysBusDevice *dev, int n, hwaddr addr);
void sysbus_mmio_map_overlap(SysBusDevice *dev, int n, hwaddr addr,
int priority);
--
1.8.1.4
- [Qemu-ppc] [PATCH v3 0/7] Dynamic sysbus device allocation support, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 1/7] sysbus: Add dynamic sysbus device search, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 6/7] PPC: e500: Support dynamically spawned sysbus devices, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 5/7] sysbus: Add new platform bus helper device, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 4/7] sysbus: Expose MMIO enumeration helper, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 2/7] sysbus: Make devices spawnable via -device, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 7/7] e500: Add support for eTSEC in device tree, Alexander Graf, 2014/09/24
- [Qemu-ppc] [PATCH v3 3/7] sysbus: Expose IRQ enumeration helpers,
Alexander Graf <=
- Re: [Qemu-ppc] [PATCH v3 0/7] Dynamic sysbus device allocation support, Paolo Bonzini, 2014/09/24