2 This module provide Hand-Off Block manupulation.
4 Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials
6 are licensed and made available under the terms and conditions of the BSD License
7 which accompanies this distribution. The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php
10 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
11 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
19 Gets the pointer to the HOB List.
21 @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
22 @param HobList Pointer to the HOB List.
24 @retval EFI_SUCCESS Get the pointer of HOB List
25 @retval EFI_NOT_AVAILABLE_YET the HOB List is not yet published
26 @retval EFI_INVALID_PARAMETER HobList is NULL (in debug mode)
32 IN CONST EFI_PEI_SERVICES
**PeiServices
,
36 PEI_CORE_INSTANCE
*PrivateData
;
39 // Only check this parameter in debug mode
43 if (HobList
== NULL
) {
44 return EFI_INVALID_PARAMETER
;
48 PrivateData
= PEI_CORE_INSTANCE_FROM_PS_THIS(PeiServices
);
50 *HobList
= PrivateData
->HobList
.Raw
;
57 Add a new HOB to the HOB List.
59 @param PeiServices An indirect pointer to the EFI_PEI_SERVICES table published by the PEI Foundation.
60 @param Type Type of the new HOB.
61 @param Length Length of the new HOB to allocate.
62 @param Hob Pointer to the new HOB.
64 @return EFI_SUCCESS Success to create hob.
65 @retval EFI_INVALID_PARAMETER if Hob is NULL
66 @retval EFI_NOT_AVAILABLE_YET if HobList is still not available.
67 @retval EFI_OUT_OF_RESOURCES if there is no more memory to grow the Hoblist.
73 IN CONST EFI_PEI_SERVICES
**PeiServices
,
80 EFI_HOB_HANDOFF_INFO_TABLE
*HandOffHob
;
81 EFI_HOB_GENERIC_HEADER
*HobEnd
;
82 EFI_PHYSICAL_ADDRESS FreeMemory
;
85 Status
= PeiGetHobList (PeiServices
, Hob
);
86 if (EFI_ERROR(Status
)) {
92 Length
= (UINT16
)((Length
+ 0x7) & (~0x7));
94 FreeMemory
= HandOffHob
->EfiFreeMemoryTop
-
95 HandOffHob
->EfiFreeMemoryBottom
;
97 if (FreeMemory
< Length
) {
98 DEBUG ((EFI_D_ERROR
, "PeiCreateHob fail: Length - 0x%08x\n", (UINTN
)Length
));
99 DEBUG ((EFI_D_ERROR
, " FreeMemoryTop - 0x%08x\n", (UINTN
)HandOffHob
->EfiFreeMemoryTop
));
100 DEBUG ((EFI_D_ERROR
, " FreeMemoryBottom - 0x%08x\n", (UINTN
)HandOffHob
->EfiFreeMemoryBottom
));
101 return EFI_OUT_OF_RESOURCES
;
104 *Hob
= (VOID
*) (UINTN
) HandOffHob
->EfiEndOfHobList
;
105 ((EFI_HOB_GENERIC_HEADER
*) *Hob
)->HobType
= Type
;
106 ((EFI_HOB_GENERIC_HEADER
*) *Hob
)->HobLength
= Length
;
107 ((EFI_HOB_GENERIC_HEADER
*) *Hob
)->Reserved
= 0;
109 HobEnd
= (EFI_HOB_GENERIC_HEADER
*) ((UINTN
) *Hob
+ Length
);
110 HandOffHob
->EfiEndOfHobList
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) HobEnd
;
112 HobEnd
->HobType
= EFI_HOB_TYPE_END_OF_HOB_LIST
;
113 HobEnd
->HobLength
= (UINT16
) sizeof (EFI_HOB_GENERIC_HEADER
);
114 HobEnd
->Reserved
= 0;
116 HandOffHob
->EfiFreeMemoryBottom
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) HobEnd
;
123 Builds a Handoff Information Table HOB
125 @param BootMode - Current Bootmode
126 @param MemoryBegin - Start Memory Address.
127 @param MemoryLength - Length of Memory.
129 @return EFI_SUCCESS Always success to initialize HOB.
133 PeiCoreBuildHobHandoffInfoTable (
134 IN EFI_BOOT_MODE BootMode
,
135 IN EFI_PHYSICAL_ADDRESS MemoryBegin
,
136 IN UINT64 MemoryLength
139 EFI_HOB_HANDOFF_INFO_TABLE
*Hob
;
140 EFI_HOB_GENERIC_HEADER
*HobEnd
;
142 Hob
= (VOID
*)(UINTN
)MemoryBegin
;
143 HobEnd
= (EFI_HOB_GENERIC_HEADER
*) (Hob
+1);
144 Hob
->Header
.HobType
= EFI_HOB_TYPE_HANDOFF
;
145 Hob
->Header
.HobLength
= (UINT16
) sizeof (EFI_HOB_HANDOFF_INFO_TABLE
);
146 Hob
->Header
.Reserved
= 0;
148 HobEnd
->HobType
= EFI_HOB_TYPE_END_OF_HOB_LIST
;
149 HobEnd
->HobLength
= (UINT16
) sizeof (EFI_HOB_GENERIC_HEADER
);
150 HobEnd
->Reserved
= 0;
152 Hob
->Version
= EFI_HOB_HANDOFF_TABLE_VERSION
;
153 Hob
->BootMode
= BootMode
;
155 Hob
->EfiMemoryTop
= MemoryBegin
+ MemoryLength
;
156 Hob
->EfiMemoryBottom
= MemoryBegin
;
157 Hob
->EfiFreeMemoryTop
= MemoryBegin
+ MemoryLength
;
158 Hob
->EfiFreeMemoryBottom
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) (HobEnd
+ 1);
159 Hob
->EfiEndOfHobList
= (EFI_PHYSICAL_ADDRESS
) (UINTN
) HobEnd
;