+ ## PCI Serial Parameters. It is an array of VendorID, DeviceID, ClockRate, Offset,\r
+ # BarIndex, RegisterStride, ReceiveFifoDepth, TransmitFifoDepth information that\r
+ # describes the parameters of special PCI serial devices.\r
+ # Each array entry is 24-byte in length. The array is terminated\r
+ # by an array entry with a PCI Vendor ID of 0xFFFF. If a platform only contains a\r
+ # standard 16550 PCI serial device whose class code is 7/0/2, the value is 0xFFFF.\r
+ # The C style structure is defined as below:<BR>\r
+ # typedef struct {<BR>\r
+ # UINT16 VendorId; ///< Vendor ID to match the PCI device. The value 0xFFFF terminates the list of entries.<BR>\r
+ # UINT16 DeviceId; ///< Device ID to match the PCI device.<BR>\r
+ # UINT32 ClockRate; ///< UART clock rate. Set to 0 for default clock rate of 1843200 Hz.<BR>\r
+ # UINT64 Offset; ///< The byte offset into to the BAR.<BR>\r
+ # UINT8 BarIndex; ///< Which BAR to get the UART base address.<BR>\r
+ # UINT8 RegisterStride; ///< UART register stride in bytes. Set to 0 for default register stride of 1 byte.<BR>\r
+ # UINT16 ReceiveFifoDepth; ///< UART receive FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.<BR>\r
+ # UINT16 TransmitFifoDepth; ///< UART transmit FIFO depth in bytes. Set to 0 for a default FIFO depth of 16 bytes.<BR>\r
+ # UINT8 Reserved[2];<BR>\r
+ # } PCI_SERIAL_PARAMETER;<BR>\r
+ # It contains zero or more instances of the above structure.<BR>\r
+ # For example, if a PCI device contains two UARTs, PcdPciSerialParameters needs\r
+ # to contain two instances of the above structure, with the VendorId and DeviceId\r
+ # equals to the Device ID and Vendor ID of the device; If the PCI device uses the\r
+ # first two BARs to support two UARTs, BarIndex of first instance equals to 0 and\r
+ # BarIndex of second one equals to 1; If the PCI device uses the first BAR to\r
+ # support both UARTs, BarIndex of both instance equals to 0, Offset of first\r
+ # instance equals to 0 and Offset of second one equals to a value bigger than or\r
+ # equal to 8.<BR>\r
+ # For certain UART whose register needs to be accessed in DWORD aligned address,\r
+ # RegisterStride equals to 4.\r
+ # @Prompt Pci Serial Parameters\r
+ gEfiMdeModulePkgTokenSpaceGuid.PcdPciSerialParameters|{0xFF, 0xFF}|VOID*|0x00010071\r
+\r
+ ## Serial Port Extended Transmit FIFO Size. The default is 64 bytes.\r