149 pub const PORT_PCI_CONFIG_ADDRESS: u16 = 0xcf8;
150 pub const PORT_PCI_CONFIG_DATA: u16 = 0xcfc;
152 pub type SegmentGroupNumber = u16; //理论上最多支持65535个Segment_Group
156     pub struct Status: u16 {
185     pub struct Command: u16 {
343     pub msix_table_size: u16, // msix表的表项数量
346     pub vendor_id: u16, // 供应商ID 0xffff是一个无效值，在读取访问不存在的设备的配置空间寄存器时返回
347     pub device_id: u16, // 设备ID，标志特定设备
348     pub command: u16, // 提供对设备生成和响应pci周期的能力的控制 向该寄存器写入0时，设备与pci总线断开除配置空间访问以外的所有连接
349     pub status: u16,  // 用于记录pci总线相关时间的状态信息寄存器
370     pub subsystem_vendor_id: u16,
371     pub subsystem_id: u16,
375     pub reserved1: u16,
428     pub secondary_status: u16,
429     pub memory_base: u16,
430     pub memory_limit: u16,
431     pub prefetchable_memory_base: u16,
432     pub prefetchable_memory_limit: u16,
435     pub io_base_upper_16_bits: u16,
436     pub io_limit_upper_16_bits: u16,
439     pub reserved1: u16,
443     pub bridge_control: u16,
470     pub secondary_status: u16,
485     pub bridge_control: u16,
486     pub subsystem_device_id: u16,
487     pub subsystem_vendor_id: u16,
576     fn cam_offset(&self, bus_device_function: BusDeviceFunction, register_offset: u16) -> u32 {  in cam_offset()
590     pub fn read_config(&self, bus_device_function: BusDeviceFunction, register_offset: u16) -> u32 {  in read_config()
605         register_offset: u16,  in write_config()  argument
634     let status: Status = Status::from_bits_truncate((result >> 16) as u16);  in capabilities_offset()
653     let vendor_id = result as u16;  in pci_read_header()
654     let device_id = (result >> 16) as u16;  in pci_read_header()
657     let command = result as u16;  in pci_read_header()
658     let status = (result >> 16) as u16;  in pci_read_header()
739     let subsystem_vendor_id = result as u16;  in pci_read_general_device_header()
740     let subsystem_id = (result >> 16) as u16;  in pci_read_general_device_header()
747     let reserved1 = (result >> 16) as u16;  in pci_read_general_device_header()
796     let secondary_status = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
799     let memory_base = result as u16;  in pci_read_pci_to_pci_bridge_header()
800     let memory_limit = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
803     let prefetchable_memory_base = result as u16;  in pci_read_pci_to_pci_bridge_header()
804     let prefetchable_memory_limit = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
810     let io_base_upper_16_bits = result as u16;  in pci_read_pci_to_pci_bridge_header()
811     let io_limit_upper_16_bits = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
816     let reserved1 = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
823     let bridge_control = (result >> 16) as u16;  in pci_read_pci_to_pci_bridge_header()
867     let secondary_status = (result >> 16) as u16;  in pci_read_pci_to_cardbus_bridge_header()
887     let bridge_control = (result >> 16) as u16;  in pci_read_pci_to_cardbus_bridge_header()
890     let subsystem_device_id = result as u16;  in pci_read_pci_to_cardbus_bridge_header()
891     let subsystem_vendor_id = (result >> 16) as u16;  in pci_read_pci_to_cardbus_bridge_header()
1386     pub private_header: u16,
1406         let private_header = (capability_header >> 16) as u16;  in next()
1430     pub offset: u16,
1432     pub id: u16,
1443     pub next_capability_offset: Option<u16>,
1452         let id = capability_header as u16;  in next()
1453         let next_offset = (capability_header >> 20) as u16;  in next()