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9071550e | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2006 - 2007, 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 | Module Name:\r | |
13 | \r | |
14 | MemStorage.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | handles variable store/reads with emulated memory\r | |
19 | \r | |
20 | Revision History\r | |
21 | \r | |
22 | --*/\r | |
23 | #include "FSVariable.h"\r | |
24 | \r | |
25 | STATIC\r | |
26 | VOID\r | |
27 | EFIAPI\r | |
28 | OnVirtualAddressChange (\r | |
29 | IN EFI_EVENT Event,\r | |
30 | IN VOID *Context\r | |
31 | );\r | |
32 | \r | |
33 | STATIC\r | |
34 | EFI_STATUS\r | |
35 | EFIAPI\r | |
36 | MemEraseStore(\r | |
37 | IN VARIABLE_STORAGE *This\r | |
38 | );\r | |
39 | \r | |
40 | STATIC\r | |
41 | EFI_STATUS\r | |
42 | EFIAPI\r | |
43 | MemWriteStore (\r | |
44 | IN VARIABLE_STORAGE *This,\r | |
45 | IN UINTN Offset,\r | |
46 | IN UINTN BufferSize,\r | |
47 | IN VOID *Buffer\r | |
48 | );\r | |
49 | \r | |
50 | EFI_STATUS\r | |
51 | MemStorageConstructor (\r | |
52 | OUT VARIABLE_STORAGE **VarStore,\r | |
53 | OUT EFI_EVENT_NOTIFY *GoVirtualEvent,\r | |
54 | IN UINTN Size\r | |
55 | )\r | |
56 | {\r | |
57 | EFI_STATUS Status;\r | |
58 | VS_DEV *Dev;\r | |
59 | \r | |
60 | Status = gBS->AllocatePool (EfiRuntimeServicesData, sizeof(VS_DEV), &Dev);\r | |
61 | ASSERT_EFI_ERROR (Status);\r | |
62 | \r | |
63 | ZeroMem (Dev, sizeof(VS_DEV));\r | |
64 | \r | |
65 | Dev->Signature = VARIABLE_STORE_SIGNATURE;\r | |
66 | Dev->Size = Size;\r | |
67 | \r | |
68 | Dev->VarStore.Erase = MemEraseStore;\r | |
69 | Dev->VarStore.Write = MemWriteStore;\r | |
70 | \r | |
71 | Status = gBS->AllocatePool (EfiRuntimeServicesData, Size, &VAR_DATA_PTR (Dev));\r | |
72 | ASSERT_EFI_ERROR (Status);\r | |
73 | \r | |
74 | DEBUG ((EFI_D_ERROR, "VStorage: Size = 0x%x\n", Size));\r | |
75 | \r | |
76 | *VarStore = &Dev->VarStore;\r | |
77 | *GoVirtualEvent = OnVirtualAddressChange;\r | |
78 | \r | |
79 | return EFI_SUCCESS;\r | |
80 | }\r | |
81 | \r | |
82 | STATIC\r | |
83 | VOID\r | |
84 | EFIAPI\r | |
85 | OnVirtualAddressChange (\r | |
86 | IN EFI_EVENT Event,\r | |
87 | IN VOID *Context\r | |
88 | )\r | |
89 | {\r | |
90 | VS_DEV *Dev;\r | |
91 | \r | |
92 | Dev = DEV_FROM_THIS (Context);\r | |
93 | \r | |
94 | EfiConvertPointer (0, &VAR_DATA_PTR (Dev));\r | |
95 | EfiConvertPointer (0, (VOID**)&Dev->VarStore.Erase);\r | |
96 | EfiConvertPointer (0, (VOID**)&Dev->VarStore.Write);\r | |
97 | }\r | |
98 | \r | |
99 | STATIC\r | |
100 | EFI_STATUS\r | |
101 | EFIAPI\r | |
102 | MemEraseStore(\r | |
103 | IN VARIABLE_STORAGE *This\r | |
104 | )\r | |
105 | {\r | |
106 | VS_DEV *Dev;\r | |
107 | \r | |
108 | Dev = DEV_FROM_THIS(This);\r | |
109 | SetMem (VAR_DATA_PTR (Dev), Dev->Size, VAR_DEFAULT_VALUE);\r | |
110 | return EFI_SUCCESS;\r | |
111 | }\r | |
112 | \r | |
113 | \r | |
114 | STATIC\r | |
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 |