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504214c4 LG |
1 | /** @file\r |
2 | \r | |
3 | Handles non-volatile variable store garbage collection, using FTW\r | |
4 | (Fault Tolerant Write) protocol.\r | |
8d3a5c82 | 5 | \r |
8a2d4996 | 6 | Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>\r |
e5eed7d3 | 7 | This program and the accompanying materials\r |
8d3a5c82 | 8 | are licensed and made available under the terms and conditions of the BSD License\r |
9 | which accompanies this distribution. The full text of the license may be found at\r | |
10 | http://opensource.org/licenses/bsd-license.php\r | |
11 | \r | |
12 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
13 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
14 | \r | |
504214c4 | 15 | **/\r |
8d3a5c82 | 16 | \r |
3cfb790c | 17 | #include "Variable.h"\r |
8d3a5c82 | 18 | \r |
7c80e839 | 19 | /**\r |
20 | Gets LBA of block and offset by given address.\r | |
21 | \r | |
8a2d4996 | 22 | This function gets the Logical Block Address (LBA) of a firmware\r |
23 | volume block containing the given address, and the offset of the\r | |
7c80e839 | 24 | address on the block.\r |
25 | \r | |
26 | @param Address Address which should be contained\r | |
8a2d4996 | 27 | by returned FVB handle.\r |
28 | @param Lba Pointer to LBA for output.\r | |
29 | @param Offset Pointer to offset for output.\r | |
7c80e839 | 30 | \r |
8a2d4996 | 31 | @retval EFI_SUCCESS LBA and offset successfully returned.\r |
32 | @retval EFI_NOT_FOUND Fail to find FVB handle by address.\r | |
33 | @retval EFI_ABORTED Fail to find valid LBA and offset.\r | |
7c80e839 | 34 | \r |
35 | **/\r | |
8d3a5c82 | 36 | EFI_STATUS\r |
37 | GetLbaAndOffsetByAddress (\r | |
38 | IN EFI_PHYSICAL_ADDRESS Address,\r | |
39 | OUT EFI_LBA *Lba,\r | |
40 | OUT UINTN *Offset\r | |
41 | )\r | |
42 | {\r | |
43 | EFI_STATUS Status;\r | |
8d3a5c82 | 44 | EFI_PHYSICAL_ADDRESS FvbBaseAddress;\r |
45 | EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *Fvb;\r | |
46 | EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;\r | |
47 | EFI_FV_BLOCK_MAP_ENTRY *FvbMapEntry;\r | |
48 | UINT32 LbaIndex;\r | |
49 | \r | |
50 | *Lba = (EFI_LBA) (-1);\r | |
51 | *Offset = 0;\r | |
8a2d4996 | 52 | \r |
8d3a5c82 | 53 | //\r |
8a2d4996 | 54 | // Get the proper FVB protocol.\r |
8d3a5c82 | 55 | //\r |
8a2d4996 | 56 | Status = GetFvbInfoByAddress (Address, NULL, &Fvb);\r |
8d3a5c82 | 57 | if (EFI_ERROR (Status)) {\r |
58 | return Status;\r | |
59 | }\r | |
60 | \r | |
8d3a5c82 | 61 | //\r |
8a2d4996 | 62 | // Get the Base Address of FV.\r |
8d3a5c82 | 63 | //\r |
64 | Status = Fvb->GetPhysicalAddress (Fvb, &FvbBaseAddress);\r | |
65 | if (EFI_ERROR (Status)) {\r | |
66 | return Status;\r | |
67 | }\r | |
68 | \r | |
69 | FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) ((UINTN) FvbBaseAddress);\r | |
70 | \r | |
71 | //\r | |
8a2d4996 | 72 | // Get the (LBA, Offset) of Address.\r |
8d3a5c82 | 73 | //\r |
8a2d4996 | 74 | if ((FwVolHeader->FvLength) > (FwVolHeader->HeaderLength)) {\r |
75 | //\r | |
76 | // BUGBUG: Assume one FV has one type of BlockLength.\r | |
77 | //\r | |
78 | FvbMapEntry = &FwVolHeader->BlockMap[0];\r | |
79 | for (LbaIndex = 1; LbaIndex <= FvbMapEntry->NumBlocks; LbaIndex += 1) {\r | |
80 | if (Address < (FvbBaseAddress + FvbMapEntry->Length * LbaIndex)) {\r | |
81 | //\r | |
82 | // Found the (Lba, Offset).\r | |
83 | //\r | |
84 | *Lba = LbaIndex - 1;\r | |
85 | *Offset = (UINTN) (Address - (FvbBaseAddress + FvbMapEntry->Length * (LbaIndex - 1)));\r | |
86 | return EFI_SUCCESS;\r | |
87 | }\r | |
8d3a5c82 | 88 | }\r |
89 | }\r | |
90 | \r | |
91 | return EFI_ABORTED;\r | |
92 | }\r | |
93 | \r | |
7c80e839 | 94 | /**\r |
95 | Writes a buffer to variable storage space, in the working block.\r | |
96 | \r | |
8a2d4996 | 97 | This function writes a buffer to variable storage space into a firmware\r |
7c80e839 | 98 | volume block device. The destination is specified by parameter\r |
99 | VariableBase. Fault Tolerant Write protocol is used for writing.\r | |
100 | \r | |
101 | @param VariableBase Base address of variable to write\r | |
8a2d4996 | 102 | @param Buffer Point to the data buffer.\r |
103 | @param BufferSize The number of bytes of the data Buffer.\r | |
7c80e839 | 104 | \r |
8a2d4996 | 105 | @retval EFI_SUCCESS The function completed successfully.\r |
106 | @retval EFI_NOT_FOUND Fail to locate Fault Tolerant Write protocol.\r | |
107 | @retval EFI_ABORTED The function could not complete successfully.\r | |
7c80e839 | 108 | \r |
109 | **/\r | |
8d3a5c82 | 110 | EFI_STATUS\r |
111 | FtwVariableSpace (\r | |
112 | IN EFI_PHYSICAL_ADDRESS VariableBase,\r | |
113 | IN UINT8 *Buffer,\r | |
114 | IN UINTN BufferSize\r | |
115 | )\r | |
8d3a5c82 | 116 | {\r |
88a5561c LG |
117 | EFI_STATUS Status;\r |
118 | EFI_HANDLE FvbHandle;\r | |
119 | EFI_LBA VarLba;\r | |
120 | UINTN VarOffset;\r | |
121 | UINT8 *FtwBuffer;\r | |
122 | UINTN FtwBufferSize;\r | |
123 | EFI_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;\r | |
8d3a5c82 | 124 | \r |
125 | //\r | |
8a2d4996 | 126 | // Locate fault tolerant write protocol.\r |
8d3a5c82 | 127 | //\r |
8a2d4996 | 128 | Status = GetFtwProtocol((VOID **) &FtwProtocol);\r |
8d3a5c82 | 129 | if (EFI_ERROR (Status)) {\r |
130 | return EFI_NOT_FOUND;\r | |
131 | }\r | |
132 | //\r | |
8a2d4996 | 133 | // Locate Fvb handle by address.\r |
8d3a5c82 | 134 | //\r |
8a2d4996 | 135 | Status = GetFvbInfoByAddress (VariableBase, &FvbHandle, NULL);\r |
8d3a5c82 | 136 | if (EFI_ERROR (Status)) {\r |
137 | return Status;\r | |
138 | }\r | |
139 | //\r | |
8a2d4996 | 140 | // Get LBA and Offset by address.\r |
8d3a5c82 | 141 | //\r |
142 | Status = GetLbaAndOffsetByAddress (VariableBase, &VarLba, &VarOffset);\r | |
143 | if (EFI_ERROR (Status)) {\r | |
144 | return EFI_ABORTED;\r | |
145 | }\r | |
146 | //\r | |
8a2d4996 | 147 | // Prepare for the variable data.\r |
8d3a5c82 | 148 | //\r |
149 | FtwBufferSize = ((VARIABLE_STORE_HEADER *) ((UINTN) VariableBase))->Size;\r | |
8a2d4996 | 150 | FtwBuffer = AllocatePool (FtwBufferSize);\r |
8d3a5c82 | 151 | if (FtwBuffer == NULL) {\r |
152 | return EFI_OUT_OF_RESOURCES;\r | |
153 | }\r | |
154 | \r | |
155 | SetMem (FtwBuffer, FtwBufferSize, (UINT8) 0xff);\r | |
156 | CopyMem (FtwBuffer, Buffer, BufferSize);\r | |
157 | \r | |
158 | //\r | |
8a2d4996 | 159 | // FTW write record.\r |
8d3a5c82 | 160 | //\r |
88a5561c | 161 | Status = FtwProtocol->Write (\r |
8a2d4996 | 162 | FtwProtocol,\r |
163 | VarLba, // LBA\r | |
164 | VarOffset, // Offset\r | |
165 | FtwBufferSize, // NumBytes\r | |
166 | NULL, // PrivateData NULL\r | |
167 | FvbHandle, // Fvb Handle\r | |
168 | FtwBuffer // write buffer\r | |
169 | );\r | |
8d3a5c82 | 170 | \r |
171 | FreePool (FtwBuffer);\r | |
172 | return Status;\r | |
173 | }\r |