uefi 如何读写磁盘

////// This protocol is used to abstract Block I/O interfaces.///struct _EFI_DISK_IO_PROTOCOL {  ///  /// The revision to which the disk I/O interface adheres. All future  /// revisions must be backwards compatible. If a future version is not  /// backwards compatible, it is not the same GUID.  ///  UINT64          Revision;  EFI_DISK_READ   ReadDisk;  EFI_DISK_WRITE  WriteDisk;};