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code.delx.au - refind/blob - EfiLib/legacy.h
3 * CSM/legacy boot support functions
5 * Taken from Tianocore source code (mostly IntelFrameworkModulePkg/Universal/BdsDxe/BootMaint/BBSsupport.c)
7 * Copyright (c) 2004 - 2011, Intel Corporation. All rights reserved.<BR>
8 * This program and the accompanying materials
9 * are licensed and made available under the terms and conditions of the BSD License
10 * which accompanies this distribution. The full text of the license may be found at
11 * http://opensource.org/licenses/bsd-license.php
13 * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
18 #include "LegacyBios.h"
23 #define BBS_MEDIA_PRESENT 0x0800
24 #define BBS_MEDIA_MAYBE_PRESENT 0x0400
26 typedef UINT8 BBS_TYPE
;
28 #define VAR_FLAG EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_NON_VOLATILE
32 /// For each legacy boot option in BBS table, a corresponding Boot#### variables is created.
33 /// The structure saves the mapping relationship between #### and the index in the BBS table.
36 UINT16 BootOptionNumber
;
39 } BOOT_OPTION_BBS_MAPPING
;
46 /// Length = sizeof (UINT16) + sizeof (Data)
50 } LEGACY_DEV_ORDER_ENTRY
;
54 BdsAddNonExistingLegacyBootOptions (
59 Delete all the invalid legacy boot options.
61 @retval EFI_SUCCESS All invalide legacy boot options are deleted.
62 @retval EFI_OUT_OF_RESOURCES Fail to allocate necessary memory.
63 @retval EFI_NOT_FOUND Fail to retrive variable of boot order.
66 BdsDeleteAllInvalidLegacyBootOptions (
71 BdsIsLegacyBootOption (
72 IN UINT8
*BootOptionVar
,
73 OUT BBS_TABLE
**BbsEntry
,
78 BdsBuildLegacyDevNameString (
79 IN BBS_TABLE
*CurBBSEntry
,
82 OUT CHAR16
*BootString