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1 | /** @file\r |
2 | HOB Library.\r |
3 | \r |
4 | Copyright (c) 2006, Intel Corporation<BR>\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 |
13 | Module Name: HobLib.c\r |
14 | \r |
15 | **/\r |
16 | \r |
17 | \r |
18 | \r |
19 | extern VOID *gHobList;\r |
20 | \r |
21 | /**\r |
22 | Returns the pointer to the HOB list.\r |
23 | \r |
24 | @return The pointer to the HOB list.\r |
25 | \r |
26 | **/\r |
27 | VOID *\r |
28 | EFIAPI\r |
29 | GetHobList (\r |
30 | VOID\r |
31 | )\r |
32 | {\r |
33 | return gHobList;\r |
34 | }\r |
35 | \r |
36 | /**\r |
37 | This function searches the first instance of a HOB type from the starting HOB pointer. \r |
38 | If there does not exist such HOB type from the starting HOB pointer, it will return NULL. \r |
39 | \r |
40 | @param Type The HOB type to return.\r |
41 | @param HobStart The starting HOB pointer to search from.\r |
42 | \r |
43 | @return The next instance of a HOB type from the starting HOB.\r |
44 | \r |
45 | **/\r |
46 | VOID *\r |
47 | EFIAPI\r |
48 | GetNextHob (\r |
49 | IN UINT16 Type,\r |
50 | IN CONST VOID *HobStart\r |
51 | )\r |
52 | {\r |
53 | EFI_PEI_HOB_POINTERS Hob;\r |
54 | \r |
55 | ASSERT (HobStart != NULL);\r |
56 | \r |
57 | Hob.Raw = (UINT8 *) HobStart;\r |
58 | //\r |
59 | // Parse the HOB list, stop if end of list or matching type found.\r |
60 | //\r |
61 | while (!END_OF_HOB_LIST (Hob)) {\r |
62 | if (Hob.Header->HobType == Type) {\r |
63 | return Hob.Raw;\r |
64 | }\r |
65 | Hob.Raw = GET_NEXT_HOB (Hob);\r |
66 | }\r |
67 | return NULL;\r |
68 | }\r |
69 | \r |
70 | /**\r |
71 | This function searches the first instance of a HOB type among the whole HOB list. \r |
72 | If there does not exist such HOB type in the HOB list, it will return NULL. \r |
73 | \r |
74 | @param Type The HOB type to return.\r |
75 | \r |
76 | @return The next instance of a HOB type from the starting HOB.\r |
77 | \r |
78 | **/\r |
79 | VOID *\r |
80 | EFIAPI\r |
81 | GetFirstHob (\r |
82 | IN UINT16 Type\r |
83 | )\r |
84 | {\r |
85 | VOID *HobList;\r |
86 | \r |
87 | HobList = GetHobList ();\r |
88 | return GetNextHob (Type, HobList);\r |
89 | }\r |
90 | \r |
91 | /**\r |
92 | This function searches the first instance of a HOB from the starting HOB pointer. \r |
93 | Such HOB should satisfy two conditions: \r |
94 | its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid. \r |
95 | If there does not exist such HOB from the starting HOB pointer, it will return NULL. \r |
96 | \r |
97 | @param Guid The GUID to match with in the HOB list.\r |
98 | @param HobStart A pointer to a Guid.\r |
99 | \r |
100 | @return The next instance of the matched GUID HOB from the starting HOB.\r |
101 | \r |
102 | **/\r |
103 | VOID *\r |
104 | EFIAPI\r |
105 | GetNextGuidHob (\r |
106 | IN CONST EFI_GUID *Guid,\r |
107 | IN CONST VOID *HobStart\r |
108 | )\r |
109 | {\r |
110 | EFI_PEI_HOB_POINTERS GuidHob;\r |
111 | \r |
112 | GuidHob.Raw = (UINT8 *) HobStart;\r |
113 | while ((GuidHob.Raw = GetNextHob (EFI_HOB_TYPE_GUID_EXTENSION, GuidHob.Raw)) != NULL) {\r |
114 | if (CompareGuid (Guid, &GuidHob.Guid->Name)) {\r |
115 | break;\r |
116 | }\r |
117 | GuidHob.Raw = GET_NEXT_HOB (GuidHob);\r |
118 | }\r |
119 | return GuidHob.Raw;\r |
120 | }\r |
121 | \r |
122 | /**\r |
123 | This function searches the first instance of a HOB among the whole HOB list. \r |
124 | Such HOB should satisfy two conditions:\r |
125 | its HOB type is EFI_HOB_TYPE_GUID_EXTENSION and its GUID Name equals to the input Guid.\r |
126 | If there does not exist such HOB from the starting HOB pointer, it will return NULL.\r |
127 | \r |
128 | @param Guid The GUID to match with in the HOB list.\r |
129 | \r |
130 | @return The first instance of the matched GUID HOB among the whole HOB list.\r |
131 | \r |
132 | **/\r |
133 | VOID *\r |
134 | EFIAPI\r |
135 | GetFirstGuidHob (\r |
136 | IN CONST EFI_GUID *Guid\r |
137 | )\r |
138 | {\r |
139 | VOID *HobList;\r |
140 | \r |
141 | HobList = GetHobList ();\r |
142 | return GetNextGuidHob (Guid, HobList);\r |
143 | }\r |
144 | \r |
145 | /**\r |
146 | This function builds a HOB for a loaded PE32 module.\r |
147 | \r |
148 | @param ModuleName The GUID File Name of the module.\r |
149 | @param MemoryAllocationModule The 64 bit physical address of the module.\r |
150 | @param ModuleLength The length of the module in bytes.\r |
151 | Content-type: text/html
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