1 files changed, 78 insertions, 0 deletions
diff --git a/include/hw/pci/pci_bus.h b/include/hw/pci/pci_bus.h
new file mode 100644
index 0000000000..6ee443cf88
--- /dev/null
+++ b/include/hw/pci/pci_bus.h
@@ -0,0 +1,78 @@
+#ifndef QEMU_PCI_BUS_H
+#define QEMU_PCI_BUS_H
+
+/*
+ * PCI Bus and Bridge datastructures.
+ *
+ * Do not access the following members directly;
+ * use accessor functions in pci.h, pci_bridge.h
+ */
+
+struct PCIBus {
+    BusState qbus;
+    PCIDMAContextFunc dma_context_fn;
+    void *dma_context_opaque;
+    uint8_t devfn_min;
+    pci_set_irq_fn set_irq;
+    pci_map_irq_fn map_irq;
+    pci_route_irq_fn route_intx_to_irq;
+    pci_hotplug_fn hotplug;
+    DeviceState *hotplug_qdev;
+    void *irq_opaque;
+    PCIDevice *devices[PCI_SLOT_MAX * PCI_FUNC_MAX];
+    PCIDevice *parent_dev;
+    MemoryRegion *address_space_mem;
+    MemoryRegion *address_space_io;
+
+    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 PCIBridgeWindows PCIBridgeWindows;
+
+/*
+ * Aliases for each of the address space windows that the bridge
+ * can forward. Mapped into the bridge's parent's address space,
+ * as subregions.
+ */
+struct PCIBridgeWindows {
+    MemoryRegion alias_pref_mem;
+    MemoryRegion alias_mem;
+    MemoryRegion alias_io;
+    /*
+     * When bridge control VGA forwarding is enabled, bridges will
+     * provide positive decode on the PCI VGA defined I/O port and
+     * MMIO ranges.  When enabled forwarding is only qualified on the
+     * I/O and memory enable bits in the bridge command register.
+     */
+    MemoryRegion alias_vga[QEMU_PCI_VGA_NUM_REGIONS];
+};
+
+struct PCIBridge {
+    PCIDevice dev;
+
+    /* private member */
+    PCIBus sec_bus;
+    /*
+     * Memory regions for the bridge's address spaces.  These regions are not
+     * directly added to system_memory/system_io or its descendants.
+     * Bridge's secondary bus points to these, so that devices
+     * under the bridge see these regions as its address spaces.
+     * The regions are as large as the entire address space -
+     * they don't take into account any windows.
+     */
+    MemoryRegion address_space_mem;
+    MemoryRegion address_space_io;
+
+    PCIBridgeWindows *windows;
+
+    pci_map_irq_fn map_irq;
+    const char *bus_name;
+};
+
+#endif /* QEMU_PCI_BUS_H */