Basic qdev infrastructure.

Signed-off-by: Paul Brook <paul@codesourcery.com>

1 files changed, 67 insertions, 0 deletions

diff --git a/hw/qdev.h b/hw/qdev.h
new file mode 100644
index 0000000000..6e3e5ec7b5
--- /dev/null
+++ b/hw/qdev.h
@@ -0,0 +1,67 @@
+#ifndef QDEV_H
+#define QDEV_H
+
+#include "hw.h"
+
+typedef struct DeviceType DeviceType;
+
+typedef struct DeviceProperty DeviceProperty;
+
+/* This structure should not be accessed directly.  We declare it here
+   so that it can be embedded in individual device state structures.  */
+struct DeviceState
+{
+    const char *name;
+    DeviceType *type;
+    void *bus;
+    DeviceProperty *props;
+    int num_irq_sink;
+    qemu_irq *irq_sink;
+    int num_gpio_out;
+    qemu_irq *gpio_out;
+    int num_gpio_in;
+    qemu_irq *gpio_in;
+};
+
+/*** Board API.  This should go away once we have a machine config file.  ***/
+
+DeviceState *qdev_create(void *bus, const char *name);
+void qdev_init(DeviceState *dev);
+
+/* Set properties between creation and init.  */
+void qdev_set_prop_int(DeviceState *dev, const char *name, int value);
+void qdev_set_prop_ptr(DeviceState *dev, const char *name, void *value);
+
+qemu_irq qdev_get_irq_sink(DeviceState *dev, int n);
+qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
+void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
+
+/*** Device API.  ***/
+
+typedef void (*qdev_initfn)(DeviceState *dev, void *opaque);
+
+DeviceType *qdev_register(const char *name, int size, qdev_initfn init,
+                          void *opaque);
+
+/* Register device properties.  */
+void qdev_init_irq_sink(DeviceState *dev, qemu_irq_handler handler, int nirq);
+void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n);
+void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n);
+
+CharDriverState *qdev_init_chardev(DeviceState *dev);
+
+void *qdev_get_bus(DeviceState *dev);
+uint64_t qdev_get_prop_int(DeviceState *dev, const char *name, uint64_t def);
+void *qdev_get_prop_ptr(DeviceState *dev, const char *name);
+
+/* Convery from a base type to a parent type, with compile time checking.  */
+#ifdef __GNUC__
+#define DO_UPCAST(type, field, dev) ( __extension__ ( { \
+    char __attribute__((unused)) offset_must_be_zero[ \
+        -offsetof(type, field)]; \
+    container_of(dev, type, field);}))
+#else
+#define DO_UPCAST(type, field, dev) container_of(dev, type, field)
+#endif
+
+#endif