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1 | /** @file\r |
2 | SMM CPU Platform Hook NULL library instance.\r | |
3 | \r | |
4 | Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>\r | |
5 | This program and the accompanying materials\r | |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | #include <PiSmm.h>\r | |
15 | #include <Library/SmmCpuPlatformHookLib.h>\r | |
16 | \r | |
17 | /**\r | |
18 | Checks if platform produces a valid SMI.\r | |
19 | \r | |
20 | This function checks if platform produces a valid SMI. This function is\r | |
21 | called at SMM entry to detect if this is a spurious SMI. This function\r | |
22 | must be implemented in an MP safe way because it is called by multiple CPU\r | |
23 | threads.\r | |
24 | \r | |
25 | @retval TRUE There is a valid SMI\r | |
26 | @retval FALSE There is no valid SMI\r | |
27 | \r | |
28 | **/\r | |
29 | BOOLEAN\r | |
30 | EFIAPI\r | |
31 | PlatformValidSmi (\r | |
32 | VOID\r | |
33 | )\r | |
34 | {\r | |
35 | return TRUE;\r | |
36 | }\r | |
37 | \r | |
38 | /**\r | |
39 | Clears platform top level SMI status bit.\r | |
40 | \r | |
41 | This function clears platform top level SMI status bit.\r | |
42 | \r | |
43 | @retval TRUE The platform top level SMI status is cleared.\r | |
44 | @retval FALSE The platform top level SMI status cannot be cleared.\r | |
45 | \r | |
46 | **/\r | |
47 | BOOLEAN\r | |
48 | EFIAPI\r | |
49 | ClearTopLevelSmiStatus (\r | |
50 | VOID\r | |
51 | )\r | |
52 | {\r | |
53 | return TRUE;\r | |
54 | }\r | |
55 | \r | |
56 | /**\r | |
57 | Performs platform specific way of SMM BSP election.\r | |
58 | \r | |
59 | This function performs platform specific way of SMM BSP election.\r | |
60 | \r | |
61 | @param IsBsp Output parameter. TRUE: the CPU this function executes\r | |
62 | on is elected to be the SMM BSP. FALSE: the CPU this\r | |
63 | function executes on is to be SMM AP.\r | |
64 | \r | |
65 | @retval EFI_SUCCESS The function executes successfully.\r | |
66 | @retval EFI_NOT_READY The function does not determine whether this CPU should be\r | |
67 | BSP or AP. This may occur if hardware init sequence to\r | |
68 | enable the determination is yet to be done, or the function\r | |
69 | chooses not to do BSP election and will let SMM CPU driver to\r | |
70 | use its default BSP election process.\r | |
71 | @retval EFI_DEVICE_ERROR The function cannot determine whether this CPU should be\r | |
72 | BSP or AP due to hardware error.\r | |
73 | \r | |
74 | **/\r | |
75 | EFI_STATUS\r | |
76 | EFIAPI\r | |
77 | PlatformSmmBspElection (\r | |
78 | OUT BOOLEAN *IsBsp\r | |
79 | )\r | |
80 | {\r | |
81 | return EFI_NOT_READY;\r | |
82 | }\r | |
83 | \r | |
84 | /**\r | |
85 | Get platform page table attribute.\r | |
86 | \r | |
87 | This function gets page table attribute of platform.\r | |
88 | \r | |
89 | @param Address Input parameter. Obtain the page table entries attribute on this address.\r | |
90 | @param PageSize Output parameter. The size of the page.\r | |
91 | @param NumOfPages Output parameter. Number of page.\r | |
92 | @param PageAttribute Output parameter. Paging Attributes (WB, UC, etc).\r | |
93 | \r | |
94 | @retval EFI_SUCCESS The platform page table attribute from the address is determined.\r | |
95 | @retval EFI_UNSUPPORTED The platform does not support getting page table attribute for the address.\r | |
96 | \r | |
97 | **/\r | |
98 | EFI_STATUS\r | |
99 | EFIAPI\r | |
100 | GetPlatformPageTableAttribute (\r | |
101 | IN UINT64 Address,\r | |
102 | IN OUT SMM_PAGE_SIZE_TYPE *PageSize,\r | |
103 | IN OUT UINTN *NumOfPages,\r | |
104 | IN OUT UINTN *PageAttribute\r | |
105 | )\r | |
106 | {\r | |
107 | return EFI_UNSUPPORTED;\r | |
108 | }\r |