MdePkg/Include/Protocol/LoadFile2.h

   1 /** @file
   2   Load File protocol as defined in the UEFI 2.0 specification.
   3
   4   Load file protocol exists to supports the addition of new boot devices,
   5   and to support booting from devices that do not map well to file system.
   6   Network boot is done via a LoadFile protocol.
   7
   8   UEFI 2.0 can boot from any device that produces a LoadFile protocol.
   9
  10   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
  11   SPDX-License-Identifier: BSD-2-Clause-Patent
  12
  13 **/
  14
  15 #ifndef __EFI_LOAD_FILE2_PROTOCOL_H__
  16 #define __EFI_LOAD_FILE2_PROTOCOL_H__
  17
  18 #define EFI_LOAD_FILE2_PROTOCOL_GUID \
  19   { \
  20     0x4006c0c1, 0xfcb3, 0x403e, {0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d } \
  21   }
  22
  23 ///
  24 /// Protocol Guid defined by UEFI2.1.
  25 ///
  26 #define LOAD_FILE2_PROTOCOL  EFI_LOAD_FILE2_PROTOCOL_GUID
  27
  28 typedef struct _EFI_LOAD_FILE2_PROTOCOL EFI_LOAD_FILE2_PROTOCOL;
  29
  30 /**
  31   Causes the driver to load a specified file.
  32
  33   @param  This       Protocol instance pointer.
  34   @param  FilePath   The device specific path of the file to load.
  35   @param  BootPolicy Should always be FALSE.
  36   @param  BufferSize On input the size of Buffer in bytes. On output with a return
  37                      code of EFI_SUCCESS, the amount of data transferred to
  38                      Buffer. On output with a return code of EFI_BUFFER_TOO_SMALL,
  39                      the size of Buffer required to retrieve the requested file.
  40   @param  Buffer     The memory buffer to transfer the file to. IF Buffer is NULL,
  41                      then no the size of the requested file is returned in
  42                      BufferSize.
  43
  44   @retval EFI_SUCCESS           The file was loaded.
  45   @retval EFI_UNSUPPORTED       BootPolicy is TRUE.
  46   @retval EFI_INVALID_PARAMETER FilePath is not a valid device path, or
  47                                 BufferSize is NULL.
  48   @retval EFI_NO_MEDIA          No medium was present to load the file.
  49   @retval EFI_DEVICE_ERROR      The file was not loaded due to a device error.
  50   @retval EFI_NO_RESPONSE       The remote system did not respond.
  51   @retval EFI_NOT_FOUND         The file was not found
  52   @retval EFI_ABORTED           The file load process was manually canceled.
  53   @retval EFI_BUFFER_TOO_SMALL  The BufferSize is too small to read the current
  54                                 directory entry. BufferSize has been updated with
  55                                 the size needed to complete the request.
  56
  57
  58 **/
  59 typedef
  60 EFI_STATUS
  61 (EFIAPI *EFI_LOAD_FILE2)(
  62   IN EFI_LOAD_FILE2_PROTOCOL           *This,
  63   IN EFI_DEVICE_PATH_PROTOCOL         *FilePath,
  64   IN BOOLEAN                          BootPolicy,
  65   IN OUT UINTN                        *BufferSize,
  66   IN VOID                             *Buffer OPTIONAL
  67   );
  68
  69 ///
  70 /// The EFI_LOAD_FILE_PROTOCOL is a simple protocol used to obtain files from arbitrary devices.
  71 ///
  72 struct _EFI_LOAD_FILE2_PROTOCOL {
  73   EFI_LOAD_FILE2    LoadFile;
  74 };
  75
  76 extern EFI_GUID  gEfiLoadFile2ProtocolGuid;
  77
  78 #endif