[efi] Add EFI_LOAD_FILE_PROTOCOL header

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/efi/Protocol/LoadFile.h

@@ -0,0 +1,90 @@
+/** @file
+  Load File protocol as defined in the UEFI 2.0 specification.
+
+  The load file protocol exists to supports the addition of new boot devices,
+  and to support booting from devices that do not map well to file system.
+  Network boot is done via a LoadFile protocol.
+
+  UEFI 2.0 can boot from any device that produces a LoadFile protocol.
+
+Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#ifndef __EFI_LOAD_FILE_PROTOCOL_H__
+#define __EFI_LOAD_FILE_PROTOCOL_H__
+
+FILE_LICENCE ( BSD3 );
+
+#define EFI_LOAD_FILE_PROTOCOL_GUID \
+  { \
+    0x56EC3091, 0x954C, 0x11d2, {0x8E, 0x3F, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B } \
+  }
+
+///
+/// Protocol Guid defined by EFI1.1.
+///
+#define LOAD_FILE_PROTOCOL EFI_LOAD_FILE_PROTOCOL_GUID
+
+typedef struct _EFI_LOAD_FILE_PROTOCOL EFI_LOAD_FILE_PROTOCOL;
+
+///
+/// Backward-compatible with EFI1.1
+///
+typedef EFI_LOAD_FILE_PROTOCOL  EFI_LOAD_FILE_INTERFACE;
+
+/**
+  Causes the driver to load a specified file.
+
+  @param  This       Protocol instance pointer.
+  @param  FilePath   The device specific path of the file to load.
+  @param  BootPolicy If TRUE, indicates that the request originates from the
+                     boot manager is attempting to load FilePath as a boot
+                     selection. If FALSE, then FilePath must match as exact file
+                     to be loaded.
+  @param  BufferSize On input the size of Buffer in bytes. On output with a return
+                     code of EFI_SUCCESS, the amount of data transferred to
+                     Buffer. On output with a return code of EFI_BUFFER_TOO_SMALL,
+                     the size of Buffer required to retrieve the requested file.
+  @param  Buffer     The memory buffer to transfer the file to. IF Buffer is NULL,
+                     then the size of the requested file is returned in
+                     BufferSize.
+
+  @retval EFI_SUCCESS           The file was loaded.
+  @retval EFI_UNSUPPORTED       The device does not support the provided BootPolicy
+  @retval EFI_INVALID_PARAMETER FilePath is not a valid device path, or
+                                BufferSize is NULL.
+  @retval EFI_NO_MEDIA          No medium was present to load the file.
+  @retval EFI_DEVICE_ERROR      The file was not loaded due to a device error.
+  @retval EFI_NO_RESPONSE       The remote system did not respond.
+  @retval EFI_NOT_FOUND         The file was not found.
+  @retval EFI_ABORTED           The file load process was manually cancelled.
+
+**/
+typedef
+EFI_STATUS
+(EFIAPI *EFI_LOAD_FILE)(
+  IN EFI_LOAD_FILE_PROTOCOL           *This,
+  IN EFI_DEVICE_PATH_PROTOCOL         *FilePath,
+  IN BOOLEAN                          BootPolicy,
+  IN OUT UINTN                        *BufferSize,
+  IN VOID                             *Buffer OPTIONAL
+  );
+
+///
+/// The EFI_LOAD_FILE_PROTOCOL is a simple protocol used to obtain files from arbitrary devices.
+///
+struct _EFI_LOAD_FILE_PROTOCOL {
+  EFI_LOAD_FILE LoadFile;
+};
+
+extern EFI_GUID gEfiLoadFileProtocolGuid;
+
+#endif