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80c4b236 JF |
1 | /** @file\r |
2 | CPU Features DXE driver to initialize CPU features.\r | |
3 | \r | |
7367cc6c | 4 | Copyright (c) 2017 - 2018, Intel Corporation. All rights reserved.<BR>\r |
0acd8697 | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
80c4b236 JF |
6 | \r |
7 | **/\r | |
8 | \r | |
9 | #include <PiDxe.h>\r | |
10 | \r | |
11 | #include <Library/BaseLib.h>\r | |
12 | #include <Library/DebugLib.h>\r | |
13 | #include <Library/UefiLib.h>\r | |
14 | #include <Library/UefiBootServicesTableLib.h>\r | |
15 | #include <Library/RegisterCpuFeaturesLib.h>\r | |
bf5a306a | 16 | #include <Library/HobLib.h>\r |
80c4b236 JF |
17 | \r |
18 | #include <Protocol/SmmConfiguration.h>\r | |
19 | #include <Guid/CpuFeaturesInitDone.h>\r | |
20 | \r | |
21 | \r | |
22 | /**\r | |
23 | Worker function to perform CPU feature initialization.\r | |
24 | \r | |
25 | **/\r | |
26 | VOID\r | |
27 | CpuFeaturesInitializeWorker (\r | |
28 | VOID\r | |
29 | )\r | |
30 | {\r | |
31 | EFI_STATUS Status;\r | |
32 | EFI_HANDLE Handle;\r | |
33 | \r | |
34 | CpuFeaturesDetect ();\r | |
35 | \r | |
36 | CpuFeaturesInitialize ();\r | |
37 | \r | |
38 | //\r | |
39 | // Install CPU Features Init Done Protocol\r | |
40 | //\r | |
41 | Handle = NULL;\r | |
42 | Status = gBS->InstallProtocolInterface (\r | |
43 | &Handle,\r | |
44 | &gEdkiiCpuFeaturesInitDoneGuid,\r | |
45 | EFI_NATIVE_INTERFACE,\r | |
46 | NULL\r | |
47 | );\r | |
48 | ASSERT_EFI_ERROR (Status);\r | |
49 | }\r | |
50 | \r | |
51 | /**\r | |
52 | Event notification that initialize CPU features when gEfiSmmConfigurationProtocol installs.\r | |
53 | \r | |
54 | @param[in] Event The Event that is being processed, not used.\r | |
55 | @param[in] Context Event Context, not used.\r | |
56 | **/\r | |
57 | VOID\r | |
58 | EFIAPI\r | |
59 | SmmConfigurationEventNotify (\r | |
60 | IN EFI_EVENT Event,\r | |
61 | IN VOID *Context\r | |
62 | )\r | |
63 | {\r | |
64 | EFI_STATUS Status;\r | |
65 | EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;\r | |
66 | \r | |
67 | //\r | |
68 | // Make sure this notification is for this handler\r | |
69 | //\r | |
70 | Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **)&SmmConfiguration);\r | |
71 | if (EFI_ERROR (Status)) {\r | |
72 | return;\r | |
73 | }\r | |
74 | \r | |
75 | CpuFeaturesInitializeWorker ();\r | |
76 | }\r | |
77 | \r | |
78 | /**\r | |
79 | CPU Features driver entry point function.\r | |
80 | \r | |
81 | If PcdCpuFeaturesInitAfterSmmRelocation is TRUE, it will register one\r | |
82 | SMM Configuration Protocol notify function to perform CPU features\r | |
83 | initialization. Otherwise, it will perform CPU features initialization\r | |
84 | directly.\r | |
85 | \r | |
86 | @param ImageHandle Image handle this driver.\r | |
87 | @param SystemTable Pointer to the System Table.\r | |
88 | \r | |
89 | @retval EFI_SUCCESS CPU Features is initialized successfully.\r | |
90 | **/\r | |
91 | EFI_STATUS\r | |
92 | EFIAPI\r | |
93 | CpuFeaturesDxeInitialize (\r | |
94 | IN EFI_HANDLE ImageHandle,\r | |
95 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
96 | )\r | |
97 | {\r | |
98 | VOID *Registration;\r | |
bf5a306a ED |
99 | EFI_STATUS Status;\r |
100 | EFI_HANDLE Handle;\r | |
101 | \r | |
102 | if (GetFirstGuidHob (&gEdkiiCpuFeaturesInitDoneGuid) != NULL) {\r | |
103 | //\r | |
7367cc6c LG |
104 | // Try to find HOB first. This HOB exist means CPU features have\r |
105 | // been initialized by CpuFeaturesPei driver, just install\r | |
bf5a306a ED |
106 | // gEdkiiCpuFeaturesInitDoneGuid.\r |
107 | //\r | |
108 | Handle = NULL;\r | |
109 | Status = gBS->InstallProtocolInterface (\r | |
110 | &Handle,\r | |
111 | &gEdkiiCpuFeaturesInitDoneGuid,\r | |
112 | EFI_NATIVE_INTERFACE,\r | |
113 | NULL\r | |
114 | );\r | |
115 | ASSERT_EFI_ERROR (Status);\r | |
116 | return Status;\r | |
117 | }\r | |
80c4b236 JF |
118 | \r |
119 | if (PcdGetBool (PcdCpuFeaturesInitAfterSmmRelocation)) {\r | |
120 | //\r | |
121 | // Install notification callback on SMM Configuration Protocol\r | |
122 | //\r | |
123 | EfiCreateProtocolNotifyEvent (\r | |
124 | &gEfiSmmConfigurationProtocolGuid,\r | |
125 | TPL_CALLBACK,\r | |
126 | SmmConfigurationEventNotify,\r | |
127 | NULL,\r | |
128 | &Registration\r | |
129 | );\r | |
130 | } else {\r | |
131 | CpuFeaturesInitializeWorker ();\r | |
132 | }\r | |
133 | \r | |
134 | return EFI_SUCCESS;\r | |
135 | }\r | |
136 | \r |