hw/pci/pci_bus.h

   1 #ifndef QEMU_PCI_BUS_H
   2 #define QEMU_PCI_BUS_H
   3
   4 /*
   5  * PCI Bus and Bridge datastructures.
   6  *
   7  * Do not access the following members directly;
   8  * use accessor functions in pci.h, pci_bridge.h
   9  */
  10
  11 #define TYPE_PCI_BUS "PCI"
  12 #define PCI_BUS(obj) OBJECT_CHECK(PCIBus, (obj), TYPE_PCI_BUS)
  13
  14 struct PCIBus {
  15     BusState qbus;
  16     PCIDMAContextFunc dma_context_fn;
  17     void *dma_context_opaque;
  18     uint8_t devfn_min;
  19     pci_set_irq_fn set_irq;
  20     pci_map_irq_fn map_irq;
  21     pci_route_irq_fn route_intx_to_irq;
  22     pci_hotplug_fn hotplug;
  23     DeviceState *hotplug_qdev;
  24     void *irq_opaque;
  25     PCIDevice *devices[PCI_SLOT_MAX * PCI_FUNC_MAX];
  26     PCIDevice *parent_dev;
  27     MemoryRegion *address_space_mem;
  28     MemoryRegion *address_space_io;
  29
  30     QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */
  31     QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */
  32
  33     /* The bus IRQ state is the logical OR of the connected devices.
  34        Keep a count of the number of devices with raised IRQs.  */
  35     int nirq;
  36     int *irq_count;
  37 };
  38
  39 typedef struct PCIBridgeWindows PCIBridgeWindows;
  40
  41 /*
  42  * Aliases for each of the address space windows that the bridge
  43  * can forward. Mapped into the bridge's parent's address space,
  44  * as subregions.
  45  */
  46 struct PCIBridgeWindows {
  47     MemoryRegion alias_pref_mem;
  48     MemoryRegion alias_mem;
  49     MemoryRegion alias_io;
  50 };
  51
  52 struct PCIBridge {
  53     PCIDevice dev;
  54
  55     /* private member */
  56     PCIBus sec_bus;
  57     /*
  58      * Memory regions for the bridge's address spaces.  These regions are not
  59      * directly added to system_memory/system_io or its descendants.
  60      * Bridge's secondary bus points to these, so that devices
  61      * under the bridge see these regions as its address spaces.
  62      * The regions are as large as the entire address space -
  63      * they don't take into account any windows.
  64      */
  65     MemoryRegion address_space_mem;
  66     MemoryRegion address_space_io;
  67
  68     PCIBridgeWindows *windows;
  69
  70     pci_map_irq_fn map_irq;
  71     const char *bus_name;
  72 };
  73
  74 #endif /* QEMU_PCI_BUS_H */