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9071550e | 1 | /*++\r |
2 | \r | |
741a1e58 ED |
3 | Caution: This file is used for Duet platform only, do not use them in real platform.\r |
4 | All variable code, variable metadata, and variable data used by Duet platform are on \r | |
5 | disk. They can be changed by user. BIOS is not able to protoect those.\r | |
6 | Duet trusts all meta data from disk. If variable code, variable metadata and variable\r | |
7 | data is modified in inproper way, the behavior is undefined.\r | |
8 | \r | |
9 | Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR>\r | |
b1f700a8 | 10 | This program and the accompanying materials\r |
9071550e | 11 | are licensed and made available under the terms and conditions of the BSD License\r |
12 | which accompanies this distribution. The full text of the license may be found at\r | |
13 | http://opensource.org/licenses/bsd-license.php\r | |
14 | \r | |
15 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
16 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
17 | \r | |
18 | Module Name:\r | |
19 | \r | |
20 | MemStorage.c\r | |
21 | \r | |
22 | Abstract:\r | |
23 | \r | |
24 | handles variable store/reads with emulated memory\r | |
25 | \r | |
26 | Revision History\r | |
27 | \r | |
28 | --*/\r | |
29 | #include "FSVariable.h"\r | |
30 | \r | |
9071550e | 31 | VOID\r |
32 | EFIAPI\r | |
e56dd2ce | 33 | OnVirtualAddressChangeMs (\r |
9071550e | 34 | IN EFI_EVENT Event,\r |
35 | IN VOID *Context\r | |
36 | );\r | |
37 | \r | |
9071550e | 38 | EFI_STATUS\r |
39 | EFIAPI\r | |
40 | MemEraseStore(\r | |
41 | IN VARIABLE_STORAGE *This\r | |
42 | );\r | |
43 | \r | |
9071550e | 44 | EFI_STATUS\r |
45 | EFIAPI\r | |
46 | MemWriteStore (\r | |
47 | IN VARIABLE_STORAGE *This,\r | |
48 | IN UINTN Offset,\r | |
49 | IN UINTN BufferSize,\r | |
50 | IN VOID *Buffer\r | |
51 | );\r | |
52 | \r | |
53 | EFI_STATUS\r | |
54 | MemStorageConstructor (\r | |
55 | OUT VARIABLE_STORAGE **VarStore,\r | |
56 | OUT EFI_EVENT_NOTIFY *GoVirtualEvent,\r | |
57 | IN UINTN Size\r | |
58 | )\r | |
59 | {\r | |
60 | EFI_STATUS Status;\r | |
61 | VS_DEV *Dev;\r | |
62 | \r | |
7c04a679 | 63 | Status = gBS->AllocatePool (EfiRuntimeServicesData, sizeof(VS_DEV), (VOID **) &Dev);\r |
9071550e | 64 | ASSERT_EFI_ERROR (Status);\r |
65 | \r | |
66 | ZeroMem (Dev, sizeof(VS_DEV));\r | |
67 | \r | |
439c34f3 | 68 | Dev->Signature = VS_DEV_SIGNATURE;\r |
9071550e | 69 | Dev->Size = Size;\r |
70 | \r | |
71 | Dev->VarStore.Erase = MemEraseStore;\r | |
72 | Dev->VarStore.Write = MemWriteStore;\r | |
73 | \r | |
7c04a679 | 74 | Status = gBS->AllocatePool (EfiRuntimeServicesData, Size, (VOID **) &VAR_DATA_PTR (Dev));\r |
9071550e | 75 | ASSERT_EFI_ERROR (Status);\r |
76 | \r | |
77 | DEBUG ((EFI_D_ERROR, "VStorage: Size = 0x%x\n", Size));\r | |
78 | \r | |
79 | *VarStore = &Dev->VarStore;\r | |
e56dd2ce | 80 | *GoVirtualEvent = OnVirtualAddressChangeMs;\r |
9071550e | 81 | \r |
82 | return EFI_SUCCESS;\r | |
83 | }\r | |
84 | \r | |
9071550e | 85 | VOID\r |
86 | EFIAPI\r | |
e56dd2ce | 87 | OnVirtualAddressChangeMs (\r |
9071550e | 88 | IN EFI_EVENT Event,\r |
89 | IN VOID *Context\r | |
90 | )\r | |
91 | {\r | |
92 | VS_DEV *Dev;\r | |
93 | \r | |
94 | Dev = DEV_FROM_THIS (Context);\r | |
95 | \r | |
7c04a679 | 96 | EfiConvertPointer (0, (VOID **)&VAR_DATA_PTR (Dev));\r |
97 | EfiConvertPointer (0, (VOID **)&Dev->VarStore.Erase);\r | |
98 | EfiConvertPointer (0, (VOID **)&Dev->VarStore.Write);\r | |
9071550e | 99 | }\r |
100 | \r | |
9071550e | 101 | EFI_STATUS\r |
102 | EFIAPI\r | |
103 | MemEraseStore(\r | |
104 | IN VARIABLE_STORAGE *This\r | |
105 | )\r | |
106 | {\r | |
107 | VS_DEV *Dev;\r | |
108 | \r | |
109 | Dev = DEV_FROM_THIS(This);\r | |
110 | SetMem (VAR_DATA_PTR (Dev), Dev->Size, VAR_DEFAULT_VALUE);\r | |
111 | return EFI_SUCCESS;\r | |
112 | }\r | |
113 | \r | |
114 | \r | |
9071550e | 115 | EFI_STATUS\r |
116 | EFIAPI\r | |
117 | MemWriteStore (\r | |
118 | IN VARIABLE_STORAGE *This,\r | |
119 | IN UINTN Offset,\r | |
120 | IN UINTN BufferSize,\r | |
121 | IN VOID *UserBuffer\r | |
122 | )\r | |
123 | {\r | |
124 | VS_DEV *Dev;\r | |
125 | \r | |
126 | Dev = DEV_FROM_THIS(This);\r | |
127 | \r | |
128 | ASSERT (Offset + BufferSize < Dev->Size);\r | |
129 | \r | |
130 | // For better performance\r | |
131 | if (VAR_DATA_PTR (Dev) + Offset != UserBuffer) {\r | |
132 | CopyMem (VAR_DATA_PTR (Dev) + Offset, UserBuffer, BufferSize);\r | |
133 | }\r | |
134 | return EFI_SUCCESS;\r | |
135 | }\r |