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 struct PCIBus { 12 BusState qbus; 13 PCIIOMMUFunc iommu_fn; 14 void *iommu_opaque; 15 uint8_t devfn_min; 16 pci_set_irq_fn set_irq; 17 pci_map_irq_fn map_irq; 18 pci_route_irq_fn route_intx_to_irq; 19 pci_hotplug_fn hotplug; 20 DeviceState *hotplug_qdev; 21 void *irq_opaque; 22 PCIDevice *devices[PCI_SLOT_MAX * PCI_FUNC_MAX]; 23 PCIDevice *parent_dev; 24 MemoryRegion *address_space_mem; 25 MemoryRegion *address_space_io; 26 27 QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */ 28 QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */ 29 30 /* The bus IRQ state is the logical OR of the connected devices. 31 Keep a count of the number of devices with raised IRQs. */ 32 int nirq; 33 int *irq_count; 34 }; 35 36 typedef struct PCIBridgeWindows PCIBridgeWindows; 37 38 /* 39 * Aliases for each of the address space windows that the bridge 40 * can forward. Mapped into the bridge's parent's address space, 41 * as subregions. 42 */ 43 struct PCIBridgeWindows { 44 MemoryRegion alias_pref_mem; 45 MemoryRegion alias_mem; 46 MemoryRegion alias_io; 47 /* 48 * When bridge control VGA forwarding is enabled, bridges will 49 * provide positive decode on the PCI VGA defined I/O port and 50 * MMIO ranges. When enabled forwarding is only qualified on the 51 * I/O and memory enable bits in the bridge command register. 52 */ 53 MemoryRegion alias_vga[QEMU_PCI_VGA_NUM_REGIONS]; 54 }; 55 56 struct PCIBridge { 57 PCIDevice dev; 58 59 /* private member */ 60 PCIBus sec_bus; 61 /* 62 * Memory regions for the bridge's address spaces. These regions are not 63 * directly added to system_memory/system_io or its descendants. 64 * Bridge's secondary bus points to these, so that devices 65 * under the bridge see these regions as its address spaces. 66 * The regions are as large as the entire address space - 67 * they don't take into account any windows. 68 */ 69 MemoryRegion address_space_mem; 70 MemoryRegion address_space_io; 71 72 PCIBridgeWindows *windows; 73 74 pci_map_irq_fn map_irq; 75 const char *bus_name; 76 }; 77 78 #endif /* QEMU_PCI_BUS_H */ 79