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3eb9473e | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006, Intel Corporation \r | |
4 | All rights reserved. This program and the accompanying materials \r | |
5 | are licensed and made available under the terms and conditions of the BSD License \r | |
6 | which accompanies this distribution. The full text of the license may be found at \r | |
7 | http://opensource.org/licenses/bsd-license.php \r | |
8 | \r | |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, \r | |
10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. \r | |
11 | \r | |
12 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | FindFv.c\r | |
16 | \r | |
17 | Abstract:\r | |
18 | \r | |
19 | Library function to find fv by hob.\r | |
20 | \r | |
21 | --*/\r | |
22 | \r | |
23 | #include "Tiano.h"\r | |
24 | #include "Pei.h"\r | |
25 | #include "PeiLib.h"\r | |
26 | #include "PeiHobLib.h"\r | |
27 | #include "EfiCommonLib.h"\r | |
28 | #include EFI_GUID_DEFINITION (FirmwareFileSystem)\r | |
29 | \r | |
30 | static\r | |
31 | VOID *\r | |
32 | GetHob (\r | |
33 | IN UINT16 Type,\r | |
34 | IN VOID *HobStart\r | |
35 | )\r | |
36 | /*++\r | |
37 | \r | |
38 | Routine Description:\r | |
39 | \r | |
40 | This function returns the first instance of a HOB type in a HOB list.\r | |
41 | \r | |
42 | Arguments:\r | |
43 | \r | |
44 | Type The HOB type to return.\r | |
45 | HobStart The first HOB in the HOB list.\r | |
46 | \r | |
47 | Returns:\r | |
48 | \r | |
49 | HobStart There were no HOBs found with the requested type.\r | |
50 | else Returns the first HOB with the matching type.\r | |
51 | \r | |
52 | --*/\r | |
53 | {\r | |
54 | EFI_PEI_HOB_POINTERS Hob;\r | |
55 | \r | |
56 | Hob.Raw = HobStart;\r | |
57 | //\r | |
58 | // Return input if not found\r | |
59 | //\r | |
60 | if (HobStart == NULL) {\r | |
61 | return HobStart;\r | |
62 | }\r | |
63 | \r | |
64 | //\r | |
65 | // Parse the HOB list, stop if end of list or matching type found.\r | |
66 | //\r | |
67 | while (!END_OF_HOB_LIST (Hob)) {\r | |
68 | \r | |
69 | if (Hob.Header->HobType == Type) {\r | |
70 | break;\r | |
71 | }\r | |
72 | \r | |
73 | Hob.Raw = GET_NEXT_HOB (Hob);\r | |
74 | }\r | |
75 | \r | |
76 | //\r | |
77 | // Return input if not found\r | |
78 | //\r | |
79 | if (END_OF_HOB_LIST (Hob)) {\r | |
80 | return HobStart;\r | |
81 | }\r | |
82 | \r | |
83 | return (VOID *) (Hob.Raw);\r | |
84 | }\r | |
85 | \r | |
86 | EFI_STATUS\r | |
87 | FindFv (\r | |
88 | IN EFI_FIND_FV_PPI *This,\r | |
89 | IN EFI_PEI_SERVICES **PeiServices,\r | |
90 | IN OUT UINT8 *FvNumber,\r | |
91 | IN OUT EFI_FIRMWARE_VOLUME_HEADER **FvAddress\r | |
92 | )\r | |
93 | /*++\r | |
94 | \r | |
95 | Routine Description:\r | |
96 | \r | |
97 | Search Fv which supports FFS.\r | |
98 | \r | |
99 | Arguments:\r | |
100 | \r | |
101 | This - Interface pointer that implement the Find Fv PPI\r | |
102 | \r | |
103 | PeiServices - Pointer to the PEI Service Table\r | |
104 | \r | |
105 | FvNumber - On input, the number of the fireware volume which supports FFS to locate\r | |
106 | On output, the next FV number which supports FFS.\r | |
107 | \r | |
108 | FVAddress - The address of the volume which supports FFS to discover\r | |
109 | \r | |
110 | Returns:\r | |
111 | \r | |
112 | EFI_SUCCESS - An addtional FV which supports FFS found\r | |
113 | EFI_OUT_OF_RESOURCES - There are no fireware volume which supports FFS for given fvnumber\r | |
114 | EFI_INVALID_PARAMETER - FvAddress is NULL\r | |
115 | \r | |
116 | --*/\r | |
117 | {\r | |
118 | EFI_STATUS Status;\r | |
119 | EFI_PEI_HOB_POINTERS HobStart;\r | |
120 | EFI_PEI_HOB_POINTERS Hob;\r | |
121 | EFI_HOB_FIRMWARE_VOLUME *FvHob;\r | |
122 | UINT8 FvIndex;\r | |
123 | \r | |
124 | if (FvAddress == NULL){\r | |
125 | return EFI_INVALID_PARAMETER;\r | |
126 | }\r | |
127 | \r | |
128 | Hob.Raw = NULL;\r | |
129 | FvIndex = 0;\r | |
130 | \r | |
131 | //\r | |
132 | // Get the Hob table pointer\r | |
133 | //\r | |
134 | Status = (*PeiServices)->GetHobList (\r | |
135 | PeiServices,\r | |
136 | &HobStart.Raw\r | |
137 | );\r | |
138 | \r | |
139 | if (EFI_ERROR (Status)) {\r | |
140 | return EFI_OUT_OF_RESOURCES;\r | |
141 | }\r | |
142 | \r | |
143 | //\r | |
144 | // Loop to search the wanted FirmwareVolume which supports FFS\r | |
145 | //\r | |
146 | //\r | |
147 | while (FvIndex <= *FvNumber) {\r | |
148 | \r | |
149 | Hob.Raw = GetHob (EFI_HOB_TYPE_FV, HobStart.Raw); \r | |
150 | \r | |
151 | //\r | |
152 | // If the Hob is not EFI_HOB_TYPE_FV, it indicates that\r | |
153 | // we have finished all FV volumes search, and there is no\r | |
154 | // the FFS FV specified by FvNumber.\r | |
155 | //\r | |
156 | if (Hob.Header->HobType != EFI_HOB_TYPE_FV) {\r | |
157 | *FvNumber = 0;\r | |
158 | return EFI_OUT_OF_RESOURCES;\r | |
159 | }\r | |
160 | \r | |
161 | HobStart.Raw = Hob.Raw + Hob.Header->HobLength;\r | |
162 | FvHob = Hob.FirmwareVolume;\r | |
163 | *FvAddress = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvHob->BaseAddress);\r | |
164 | //\r | |
165 | // Check if the FV supports FFS\r | |
166 | //\r | |
167 | if (EfiCompareGuid (&((*FvAddress)->FileSystemGuid), &gEfiFirmwareFileSystemGuid)) {\r | |
168 | FvIndex++;\r | |
169 | }\r | |
170 | }\r | |
171 | \r | |
172 | //\r | |
173 | // Return the next FV number which supports FFS.\r | |
174 | //\r | |
175 | (*FvNumber)++;\r | |
176 | \r | |
177 | return EFI_SUCCESS;\r | |
178 | \r | |
179 | }\r |