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1 | /** @file\r |
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2 | This module provide Hand-Off Block manupulation.\r |
3 | \r |
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4 | Copyright (c) 2006, Intel Corporation \r |
5 | All rights reserved. This program and the accompanying materials \r |
6 | are licensed and made available under the terms and conditions of the BSD License \r |
7 | which accompanies this distribution. The full text of the license may be found at \r |
8 | http://opensource.org/licenses/bsd-license.php \r |
9 | \r |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r |
12 | \r |
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13 | **/\r |
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14 | \r |
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15 | #include <PeiMain.h>\r |
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16 | \r |
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17 | /**\r |
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18 | \r |
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19 | Gets the pointer to the HOB List.\r |
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20 | \r |
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21 | @param PeiServices The PEI core services table.\r |
22 | @param HobList Pointer to the HOB List.\r |
23 | \r |
24 | @retval EFI_SUCCESS Get the pointer of HOB List\r |
25 | @retval EFI_NOT_AVAILABLE_YET the HOB List is not yet published\r |
26 | @retval EFI_INVALID_PARAMETER HobList is NULL (in debug mode)\r |
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27 | \r |
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28 | **/\r |
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29 | EFI_STATUS\r |
30 | EFIAPI\r |
31 | PeiGetHobList (\r |
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32 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
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33 | IN OUT VOID **HobList\r |
34 | )\r |
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35 | {\r |
36 | PEI_CORE_INSTANCE *PrivateData;\r |
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37 | \r |
38 | //\r |
39 | // Only check this parameter in debug mode\r |
40 | //\r |
41 | \r |
42 | DEBUG_CODE_BEGIN (); \r |
43 | if (HobList == NULL) {\r |
44 | return EFI_INVALID_PARAMETER;\r |
45 | }\r |
46 | DEBUG_CODE_END ();\r |
47 | \r |
48 | PrivateData = PEI_CORE_INSTANCE_FROM_PS_THIS(PeiServices);\r |
49 | \r |
50 | *HobList = PrivateData->HobList.Raw;\r |
51 | \r |
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52 | return EFI_SUCCESS; \r |
53 | }\r |
54 | \r |
55 | \r |
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56 | /**\r |
57 | Add a new HOB to the HOB List.\r |
58 | \r |
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59 | @param PeiServices The PEI core services table.\r |
60 | @param Type Type of the new HOB.\r |
61 | @param Length Length of the new HOB to allocate.\r |
62 | @param Hob Pointer to the new HOB.\r |
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63 | \r |
64 | @return EFI_SUCCESS Success to create hob.\r |
65 | @retval EFI_INVALID_PARAMETER if Hob is NULL\r |
66 | @retval EFI_NOT_AVAILABLE_YET if HobList is still not available.\r |
67 | @retval EFI_OUT_OF_RESOURCES if there is no more memory to grow the Hoblist.\r |
68 | \r |
69 | **/\r |
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70 | EFI_STATUS\r |
71 | EFIAPI\r |
72 | PeiCreateHob (\r |
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73 | IN CONST EFI_PEI_SERVICES **PeiServices,\r |
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74 | IN UINT16 Type,\r |
75 | IN UINT16 Length,\r |
76 | IN OUT VOID **Hob\r |
77 | )\r |
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78 | {\r |
79 | EFI_STATUS Status;\r |
80 | EFI_HOB_HANDOFF_INFO_TABLE *HandOffHob;\r |
81 | EFI_HOB_GENERIC_HEADER *HobEnd;\r |
82 | EFI_PHYSICAL_ADDRESS FreeMemory;\r |
83 | \r |
84 | \r |
85 | Status = PeiGetHobList (PeiServices, Hob);\r |
86 | if (EFI_ERROR(Status)) {\r |
87 | return Status;\r |
88 | }\r |
89 | \r |
90 | HandOffHob = *Hob;\r |
91 | \r |
92 | Length = (UINT16)((Length + 0x7) & (~0x7));\r |
93 | \r |
94 | FreeMemory = HandOffHob->EfiFreeMemoryTop -\r |
95 | HandOffHob->EfiFreeMemoryBottom;\r |
96 | \r |
97 | if (FreeMemory < Length) {\r |
98 | DEBUG ((EFI_D_ERROR, "PeiCreateHob fail: Length - 0x%08x\n", (UINTN)Length));\r |
99 | DEBUG ((EFI_D_ERROR, " FreeMemoryTop - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryTop));\r |
100 | DEBUG ((EFI_D_ERROR, " FreeMemoryBottom - 0x%08x\n", (UINTN)HandOffHob->EfiFreeMemoryBottom));\r |
101 | return EFI_OUT_OF_RESOURCES;\r |
102 | }\r |
103 | \r |
104 | *Hob = (VOID*) (UINTN) HandOffHob->EfiEndOfHobList;\r |
105 | ((EFI_HOB_GENERIC_HEADER*) *Hob)->HobType = Type;\r |
106 | ((EFI_HOB_GENERIC_HEADER*) *Hob)->HobLength = Length;\r |
107 | ((EFI_HOB_GENERIC_HEADER*) *Hob)->Reserved = 0;\r |
108 | \r |
109 | HobEnd = (EFI_HOB_GENERIC_HEADER*) ((UINTN) *Hob + Length);\r |
110 | HandOffHob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;\r |
111 | \r |
112 | HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;\r |
113 | HobEnd->HobLength = sizeof(EFI_HOB_GENERIC_HEADER);\r |
114 | HobEnd->Reserved = 0;\r |
115 | HobEnd++;\r |
116 | HandOffHob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;\r |
117 | \r |
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118 | return EFI_SUCCESS; \r |
119 | }\r |
120 | \r |
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121 | /**\r |
122 | \r |
123 | Builds a Handoff Information Table HOB\r |
124 | \r |
125 | @param BootMode - Current Bootmode\r |
126 | @param MemoryBegin - Start Memory Address.\r |
127 | @param MemoryLength - Length of Memory.\r |
128 | \r |
129 | @return EFI_SUCCESS Always success to initialize HOB.\r |
130 | \r |
131 | **/\r |
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132 | EFI_STATUS\r |
133 | PeiCoreBuildHobHandoffInfoTable (\r |
134 | IN EFI_BOOT_MODE BootMode,\r |
135 | IN EFI_PHYSICAL_ADDRESS MemoryBegin,\r |
136 | IN UINT64 MemoryLength\r |
137 | )\r |
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138 | {\r |
139 | EFI_HOB_HANDOFF_INFO_TABLE *Hob;\r |
140 | EFI_HOB_GENERIC_HEADER *HobEnd;\r |
141 | \r |
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142 | Hob = (VOID *)(UINTN)MemoryBegin;\r |
143 | HobEnd = (EFI_HOB_GENERIC_HEADER*) (Hob+1);\r |
144 | Hob->Header.HobType = EFI_HOB_TYPE_HANDOFF;\r |
145 | Hob->Header.HobLength = sizeof(EFI_HOB_HANDOFF_INFO_TABLE);\r |
146 | Hob->Header.Reserved = 0;\r |
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147 | \r |
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148 | HobEnd->HobType = EFI_HOB_TYPE_END_OF_HOB_LIST;\r |
149 | HobEnd->HobLength = sizeof(EFI_HOB_GENERIC_HEADER);\r |
150 | HobEnd->Reserved = 0;\r |
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151 | \r |
152 | Hob->Version = EFI_HOB_HANDOFF_TABLE_VERSION;\r |
153 | Hob->BootMode = BootMode;\r |
154 | \r |
155 | Hob->EfiMemoryTop = MemoryBegin + MemoryLength;\r |
156 | Hob->EfiMemoryBottom = MemoryBegin;\r |
157 | Hob->EfiFreeMemoryTop = MemoryBegin + MemoryLength;\r |
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158 | Hob->EfiFreeMemoryBottom = (EFI_PHYSICAL_ADDRESS) (UINTN) (HobEnd + 1);\r |
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159 | Hob->EfiEndOfHobList = (EFI_PHYSICAL_ADDRESS) (UINTN) HobEnd;\r |
160 | \r |
161 | return EFI_SUCCESS;\r |
162 | }\r |