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 void *irq_opaque; 20 PCIDevice *devices[PCI_SLOT_MAX * PCI_FUNC_MAX]; 21 PCIDevice *parent_dev; 22 MemoryRegion *address_space_mem; 23 MemoryRegion *address_space_io; 24 25 QLIST_HEAD(, PCIBus) child; /* this will be replaced by qdev later */ 26 QLIST_ENTRY(PCIBus) sibling;/* this will be replaced by qdev later */ 27 28 /* The bus IRQ state is the logical OR of the connected devices. 29 Keep a count of the number of devices with raised IRQs. */ 30 int nirq; 31 int *irq_count; 32 }; 33 34 typedef struct PCIBridgeWindows PCIBridgeWindows; 35 36 /* 37 * Aliases for each of the address space windows that the bridge 38 * can forward. Mapped into the bridge's parent's address space, 39 * as subregions. 40 */ 41 struct PCIBridgeWindows { 42 MemoryRegion alias_pref_mem; 43 MemoryRegion alias_mem; 44 MemoryRegion alias_io; 45 /* 46 * When bridge control VGA forwarding is enabled, bridges will 47 * provide positive decode on the PCI VGA defined I/O port and 48 * MMIO ranges. When enabled forwarding is only qualified on the 49 * I/O and memory enable bits in the bridge command register. 50 */ 51 MemoryRegion alias_vga[QEMU_PCI_VGA_NUM_REGIONS]; 52 }; 53 54 #define TYPE_PCI_BRIDGE "base-pci-bridge" 55 #define PCI_BRIDGE(obj) OBJECT_CHECK(PCIBridge, (obj), TYPE_PCI_BRIDGE) 56 57 struct PCIBridge { 58 /*< private >*/ 59 PCIDevice parent_obj; 60 /*< public >*/ 61 62 /* private member */ 63 PCIBus sec_bus; 64 /* 65 * Memory regions for the bridge's address spaces. These regions are not 66 * directly added to system_memory/system_io or its descendants. 67 * Bridge's secondary bus points to these, so that devices 68 * under the bridge see these regions as its address spaces. 69 * The regions are as large as the entire address space - 70 * they don't take into account any windows. 71 */ 72 MemoryRegion address_space_mem; 73 MemoryRegion address_space_io; 74 75 PCIBridgeWindows *windows; 76 77 pci_map_irq_fn map_irq; 78 const char *bus_name; 79 }; 80 81 #endif /* QEMU_PCI_BUS_H */ 82