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a145e28d GS |
1 | /** @file\r |
2 | Find and extract QEMU SMBIOS data from fw_cfg.\r | |
3 | \r | |
4 | Copyright (C) 2014, Gabriel L. Somlo <somlo@cmu.edu>\r | |
5 | \r | |
b26f0cf9 | 6 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
a145e28d GS |
7 | **/\r |
8 | \r | |
7e25086a LE |
9 | #include <Library/DebugLib.h> // ASSERT_EFI_ERROR()\r |
10 | #include <Library/MemoryAllocationLib.h> // AllocatePool()\r | |
11 | #include <Library/PcdLib.h> // PcdGetBool()\r | |
12 | #include <Library/QemuFwCfgLib.h> // QemuFwCfgFindFile()\r | |
13 | \r | |
a145e28d GS |
14 | /**\r |
15 | Locates and extracts the QEMU SMBIOS data if present in fw_cfg\r | |
16 | \r | |
17 | @return Address of extracted QEMU SMBIOS data\r | |
18 | \r | |
19 | **/\r | |
20 | UINT8 *\r | |
21 | GetQemuSmbiosTables (\r | |
22 | VOID\r | |
23 | )\r | |
24 | {\r | |
ac0a286f MK |
25 | EFI_STATUS Status;\r |
26 | FIRMWARE_CONFIG_ITEM Tables;\r | |
27 | UINTN TablesSize;\r | |
28 | UINT8 *QemuTables;\r | |
a145e28d | 29 | \r |
92dc0bb2 | 30 | if (!PcdGetBool (PcdQemuSmbiosValidated)) {\r |
a145e28d GS |
31 | return NULL;\r |
32 | }\r | |
33 | \r | |
ac0a286f MK |
34 | Status = QemuFwCfgFindFile (\r |
35 | "etc/smbios/smbios-tables",\r | |
36 | &Tables,\r | |
37 | &TablesSize\r | |
38 | );\r | |
92dc0bb2 LE |
39 | ASSERT_EFI_ERROR (Status);\r |
40 | ASSERT (TablesSize > 0);\r | |
a145e28d GS |
41 | \r |
42 | QemuTables = AllocatePool (TablesSize);\r | |
43 | if (QemuTables == NULL) {\r | |
44 | return NULL;\r | |
45 | }\r | |
46 | \r | |
47 | QemuFwCfgSelectItem (Tables);\r | |
48 | QemuFwCfgReadBytes (TablesSize, QemuTables);\r | |
49 | \r | |
50 | return QemuTables;\r | |
51 | }\r |