diff options
Diffstat (limited to 'include/hw/pci/pci_bus.h')
-rw-r--r-- | include/hw/pci/pci_bus.h | 78 |
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 0000000..6ee443c --- /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 */ |