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3eb9473e | 1 | /*++\r |
2 | \r | |
2c7e5c2f HT |
3 | Copyright (c) 2004 - 2006, Intel Corporation. All rights reserved.<BR>\r |
4 | This program and the accompanying materials \r | |
3eb9473e | 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 | \r | |
13 | Module Name:\r | |
14 | \r | |
15 | PeiServicesTablePointer.c\r | |
16 | \r | |
17 | Abstract: \r | |
18 | \r | |
19 | PEI Services Table Pointer Library.\r | |
20 | \r | |
21 | --*/\r | |
22 | \r | |
23 | #include "EdkIIGluePeim.h"\r | |
24 | \r | |
25 | /**\r | |
26 | The function returns the pointer to PeiServices.\r | |
27 | \r | |
28 | The function returns the pointer to PeiServices.\r | |
29 | It will ASSERT() if the pointer to PeiServices is NULL.\r | |
30 | \r | |
31 | @retval The pointer to PeiServices.\r | |
32 | \r | |
33 | **/\r | |
34 | EFI_PEI_SERVICES **\r | |
35 | EFIAPI\r | |
36 | GetPeiServicesTablePointer (\r | |
37 | VOID\r | |
38 | )\r | |
39 | {\r | |
c7f33ca4 | 40 | IA32_DESCRIPTOR Idtr;\r |
35d297c7 | 41 | EFI_PEI_SERVICES **PeiServices;\r |
3eb9473e | 42 | \r |
c7f33ca4 | 43 | AsmReadIdtr (&Idtr);\r |
44 | PeiServices = (EFI_PEI_SERVICES **)(UINTN)(*(UINTN*)(Idtr.Base - sizeof (UINTN)));\r | |
35d297c7 | 45 | \r |
46 | if ((*PeiServices)->Hdr.Signature == PEI_SERVICES_SIGNATURE) {\r | |
47 | return PeiServices;\r | |
48 | } else {\r | |
49 | PeiServices = (EFI_PEI_SERVICES **)(UINTN)AsmReadMm7 ();\r | |
50 | ASSERT (PeiServices != NULL);\r | |
51 | return PeiServices;\r | |
52 | }\r | |
3eb9473e | 53 | }\r |
54 | \r | |
55 | /**\r | |
56 | The constructor function caches the pointer to PEI services.\r | |
57 | \r | |
58 | The constructor function caches the pointer to PEI services.\r | |
59 | It will always return EFI_SUCCESS.\r | |
60 | \r | |
61 | @param FfsHeader Pointer to FFS header the loaded driver.\r | |
62 | @param PeiServices Pointer to the PEI services.\r | |
63 | \r | |
64 | @retval EFI_SUCCESS The constructor always returns EFI_SUCCESS.\r | |
65 | \r | |
66 | **/\r | |
67 | EFI_STATUS\r | |
68 | EFIAPI\r | |
69 | PeiServicesTablePointerLibConstructor (\r | |
70 | IN EFI_FFS_FILE_HEADER *FfsHeader,\r | |
71 | IN EFI_PEI_SERVICES **PeiServices\r | |
72 | )\r | |
73 | {\r | |
c7f33ca4 | 74 | #if (PI_SPECIFICATION_VERSION < 0x00010000)\r |
3eb9473e | 75 | AsmWriteMm7 ((UINT64)(UINTN)PeiServices);\r |
c7f33ca4 | 76 | #endif\r |
3eb9473e | 77 | return EFI_SUCCESS;\r |
78 | }\r |