typedef struct _EFI_FIRMWARE_INFORMATION
{
     ULONG FirmwareVersion;
     PVIRTUAL_EFI_RUNTIME_SERVICES VirtualEfiRuntimeServices;
     LONG SetVirtualAddressMapStatus;
     ULONG MissedMappingsCount;
} EFI_FIRMWARE_INFORMATION, *PEFI_FIRMWARE_INFORMATION;

Windows Vista Kernel Structures