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3eb9473e | 1 | /*++\r |
2 | \r | |
3 | Copyright (c) 2004 - 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 | PeiServicePointer.c\r | |
15 | \r | |
16 | Abstract:\r | |
17 | \r | |
18 | --*/\r | |
19 | \r | |
20 | #include "Tiano.h"\r | |
21 | #include "PeiApi.h"\r | |
22 | #include "PeiLib.h"\r | |
23 | \r | |
24 | #if (PI_SPECIFICATION_VERSION >= 0x00010000)\r | |
25 | \r | |
26 | #ifdef EFI_NT_EMULATOR\r | |
27 | EFI_PEI_SERVICES **gPeiServices;\r | |
28 | #endif\r | |
29 | \r | |
30 | \r | |
31 | VOID\r | |
32 | SetPeiServicesTablePointer (\r | |
33 | IN EFI_PEI_SERVICES **PeiServices\r | |
34 | )\r | |
35 | /*++\r | |
36 | \r | |
37 | Routine Description:\r | |
38 | \r | |
39 | Save PeiService pointer so that it can be retrieved anywhere.\r | |
40 | \r | |
41 | Arguments:\r | |
42 | \r | |
43 | PeiServices - The direct pointer to PeiServiceTable.\r | |
44 | PhyscialAddress - The physcial address of variable PeiServices.\r | |
45 | \r | |
46 | Returns:\r | |
47 | NONE\r | |
48 | \r | |
49 | --*/ \r | |
50 | {\r | |
51 | \r | |
52 | #ifdef EFI_NT_EMULATOR\r | |
53 | \r | |
54 | //\r | |
55 | // For NT32, set EFI_PEI_SERVICES** to global variable.\r | |
56 | //\r | |
57 | gPeiServices = PeiServices;\r | |
58 | #else\r | |
59 | \r | |
60 | //\r | |
61 | // For X86 processor,the EFI_PEI_SERVICES** is stored in the \r | |
62 | // 4 bytes immediately preceding the Interrupt Descriptor Table.\r | |
63 | //\r | |
64 | UINTN IdtBaseAddress;\r | |
65 | IdtBaseAddress = (UINTN)ReadIdtBase();\r | |
66 | *(UINTN*)(IdtBaseAddress - 4) = (UINTN)PeiServices;\r | |
67 | \r | |
68 | #endif \r | |
69 | }\r | |
70 | \r | |
71 | \r | |
72 | EFI_PEI_SERVICES **\r | |
73 | GetPeiServicesTablePointer ( \r | |
74 | VOID\r | |
75 | )\r | |
76 | /*++\r | |
77 | \r | |
78 | Routine Description:\r | |
79 | \r | |
80 | Get PeiService pointer.\r | |
81 | \r | |
82 | Arguments:\r | |
83 | \r | |
84 | NONE.\r | |
85 | \r | |
86 | Returns:\r | |
87 | The direct pointer to PeiServiceTable.\r | |
88 | \r | |
89 | --*/ \r | |
90 | {\r | |
91 | EFI_PEI_SERVICES **PeiServices;\r | |
92 | \r | |
93 | #ifdef EFI_NT_EMULATOR\r | |
94 | \r | |
95 | //\r | |
96 | // For NT32, set EFI_PEI_SERVICES** to global variable.\r | |
97 | //\r | |
98 | PeiServices = gPeiServices;\r | |
99 | #else\r | |
100 | \r | |
101 | //\r | |
102 | // For X86 processor,the EFI_PEI_SERVICES** is stored in the \r | |
103 | // 4 bytes immediately preceding the Interrupt Descriptor Table.\r | |
104 | //\r | |
105 | UINTN IdtBaseAddress;\r | |
106 | IdtBaseAddress = (UINTN)ReadIdtBase();\r | |
107 | PeiServices = (EFI_PEI_SERVICES **)(UINTN)(*(UINTN*)(IdtBaseAddress - 4));\r | |
108 | #endif\r | |
109 | return PeiServices;\r | |
110 | }\r | |
111 | \r | |
112 | \r | |
113 | VOID\r | |
114 | MigrateIdtTable (\r | |
115 | IN EFI_PEI_SERVICES **PeiServices\r | |
116 | )\r | |
117 | /*++\r | |
118 | \r | |
119 | Routine Description:\r | |
120 | \r | |
101361d9 | 121 | Migrate IDT from temporary memory to real memory where preceded with 4 bytes for\r |
3eb9473e | 122 | storing PeiService pointer.\r |
123 | \r | |
124 | Arguments:\r | |
125 | \r | |
126 | PeiServices - The direct pointer to PeiServiceTable.\r | |
127 | \r | |
128 | Returns:\r | |
129 | \r | |
130 | NONE.\r | |
131 | \r | |
132 | --*/ \r | |
133 | {\r | |
134 | #ifndef EFI_NT_EMULATOR\r | |
135 | UINT16 IdtEntrySize;\r | |
136 | UINTN OldIdtBase;\r | |
137 | UINTN Size;\r | |
138 | VOID *NewIdtBase;\r | |
139 | EFI_STATUS Status;\r | |
140 | \r | |
141 | IdtEntrySize = ReadIdtLimit();\r | |
142 | OldIdtBase = ReadIdtBase();\r | |
143 | Size = sizeof(PEI_IDT_TABLE) + (IdtEntrySize + 1); \r | |
144 | Status = (*PeiServices)->AllocatePool (PeiServices, Size, &NewIdtBase);\r | |
145 | ASSERT_PEI_ERROR (PeiServices, Status);\r | |
146 | (*PeiServices)->CopyMem ((VOID*)((UINTN)NewIdtBase + sizeof(PEI_IDT_TABLE)), (VOID*)OldIdtBase, (IdtEntrySize + 1));\r | |
147 | SetIdtBase(((UINTN)NewIdtBase + sizeof(PEI_IDT_TABLE)), IdtEntrySize);\r | |
148 | SetPeiServicesTablePointer(PeiServices);\r | |
149 | #endif\r | |
150 | }\r | |
151 | \r | |
152 | #endif\r |