pci: move out pci internal structures, PCIBus, PCIBridge, and pci_bus_info.

move out pci internal structures, PCIBus, PCIBridge and pci_bus_info into
private header file, pci_internals.h.
This is a preparation. Later pci bridge implementation will be
split out form pci.c into pci_bridge.c.
Signed-off-by: NIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/pci.c

@@ -23,6 +23,7 @@
  */
 #include "hw.h"
 #include "pci.h"
+#include "pci_internals.h"
 #include "monitor.h"
 #include "net.h"
 #include "sysemu.h"
@@ -36,31 +37,10 @@
 # define PCI_DPRINTF(format, ...)       do { } while (0)
 #endif
 
-struct PCIBus {
-    BusState qbus;
-    int devfn_min;
-    pci_set_irq_fn set_irq;
-    pci_map_irq_fn map_irq;
-    pci_hotplug_fn hotplug;
-    DeviceState *hotplug_qdev;
-    void *irq_opaque;
-    PCIDevice *devices[256];
-    PCIDevice *parent_dev;
-    target_phys_addr_t mem_base;
-
-    QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */
-    QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */
-
-    /* The bus IRQ state is the logical OR of the connected devices.
-       Keep a count of the number of devices with raised IRQs.  */
-    int nirq;
-    int *irq_count;
-};
-
 static void pcibus_dev_print(Monitor *mon, DeviceState *dev, int indent);
 static char *pcibus_get_dev_path(DeviceState *dev);
 
-static struct BusInfo pci_bus_info = {
+struct BusInfo pci_bus_info = {
     .name       = "PCI",
     .size       = sizeof(PCIBus),
     .print_dev  = pcibus_dev_print,
@@ -1533,14 +1513,6 @@ PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
     return res;
 }
 
-typedef struct {
-    PCIDevice dev;
-    PCIBus bus;
-    uint32_t vid;
-    uint32_t did;
-} PCIBridge;
-
-
 static void pci_bridge_update_mappings_fn(PCIBus *b, PCIDevice *d)
 {
     pci_update_mappings(d);

hw/pci_internals.h

+#ifndef QEMU_PCI_INTERNALS_H
+#define QEMU_PCI_INTERNALS_H
+
+/*
+ * This header files is private to pci.c and pci_bridge.c
+ * So following structures are opaque to others and shouldn't be
+ * accessed.
+ */
+
+extern struct BusInfo pci_bus_info;
+
+struct PCIBus {
+    BusState qbus;
+    int devfn_min;
+    pci_set_irq_fn set_irq;
+    pci_map_irq_fn map_irq;
+    pci_hotplug_fn hotplug;
+    DeviceState *hotplug_qdev;
+    void *irq_opaque;
+    PCIDevice *devices[256];
+    PCIDevice *parent_dev;
+    target_phys_addr_t mem_base;
+
+    QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */
+    QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */
+
+    /* The bus IRQ state is the logical OR of the connected devices.
+       Keep a count of the number of devices with raised IRQs.  */
+    int nirq;
+    int *irq_count;
+};
+
+typedef struct {
+    PCIDevice dev;
+    PCIBus bus;
+    uint32_t vid;
+    uint32_t did;
+} PCIBridge;
+
+#endif /* QEMU_PCI_INTERNALS_H */