1 files changed, 56 insertions, 0 deletions
diff --git a/hw/sysbus.h b/hw/sysbus.h
new file mode 100644
index 000000000..44ed792d2
--- /dev/null
+++ b/hw/sysbus.h
@@ -0,0 +1,56 @@
+#ifndef HW_SYSBUS_H
+#define HW_SYSBUS_H 1
+
+/* Devices attached directly to the main system bus.  */
+
+#include "qdev.h"
+
+#define QDEV_MAX_MMIO 5
+#define QDEV_MAX_IRQ 32
+
+typedef struct SysBusDevice SysBusDevice;
+typedef void (*mmio_mapfunc)(SysBusDevice *dev, target_phys_addr_t addr);
+
+struct SysBusDevice {
+    DeviceState qdev;
+    int num_irq;
+    qemu_irq irqs[QDEV_MAX_IRQ];
+    qemu_irq *irqp[QDEV_MAX_IRQ];
+    int num_mmio;
+    struct {
+        target_phys_addr_t addr;
+        target_phys_addr_t size;
+        mmio_mapfunc cb;
+        int iofunc;
+    } mmio[QDEV_MAX_MMIO];
+};
+
+typedef void (*sysbus_initfn)(SysBusDevice *dev);
+
+/* Macros to compensate for lack of type inheritance in C.  */
+#define sysbus_from_qdev(dev) ((SysBusDevice *)(dev))
+#define FROM_SYSBUS(type, dev) DO_UPCAST(type, busdev, dev)
+
+void sysbus_register_dev(const char *name, size_t size, sysbus_initfn init);
+void *sysbus_new(void);
+void sysbus_init_mmio(SysBusDevice *dev, target_phys_addr_t size, int iofunc);
+void sysbus_init_mmio_cb(SysBusDevice *dev, target_phys_addr_t size,
+                            mmio_mapfunc cb);
+void sysbus_init_irq(SysBusDevice *dev, qemu_irq *p);
+void sysbus_pass_irq(SysBusDevice *dev, SysBusDevice *target);
+
+
+void sysbus_connect_irq(SysBusDevice *dev, int n, qemu_irq irq);
+void sysbus_mmio_map(SysBusDevice *dev, int n, target_phys_addr_t addr);
+
+/* Legacy helper function for creating devices.  */
+DeviceState *sysbus_create_varargs(const char *name,
+                                 target_phys_addr_t addr, ...);
+static inline DeviceState *sysbus_create_simple(const char *name,
+                                              target_phys_addr_t addr,
+                                              qemu_irq irq)
+{
+    return sysbus_create_varargs(name, addr, irq, NULL);
+}
+
+#endif /* !HW_SYSBUS_H */