typedef struct _FIRMWARE_INFORMATION_LOADER_BLOCK
{
    unsigned long FirmwareTypeEfi : 1;
    unsigned long Reserved : 31;
    union
    {
        EFI_FIRMWARE_INFORMATION EfiInformation;
        PCAT_FIRMWARE_INFORMATION PcatInformation;
    } u;
} FIRMWARE_INFORMATION_LOADER_BLOCK, *PFIRMWARE_INFORMATION_LOADER_BLOCK;