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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 | |
80c4b236 JF |
21 | /**\r |
22 | Worker function to perform CPU feature initialization.\r | |
23 | \r | |
24 | **/\r | |
25 | VOID\r | |
26 | CpuFeaturesInitializeWorker (\r | |
27 | VOID\r | |
28 | )\r | |
29 | {\r | |
053e878b MK |
30 | EFI_STATUS Status;\r |
31 | EFI_HANDLE Handle;\r | |
80c4b236 JF |
32 | \r |
33 | CpuFeaturesDetect ();\r | |
34 | \r | |
35 | CpuFeaturesInitialize ();\r | |
36 | \r | |
37 | //\r | |
38 | // Install CPU Features Init Done Protocol\r | |
39 | //\r | |
40 | Handle = NULL;\r | |
41 | Status = gBS->InstallProtocolInterface (\r | |
42 | &Handle,\r | |
43 | &gEdkiiCpuFeaturesInitDoneGuid,\r | |
44 | EFI_NATIVE_INTERFACE,\r | |
45 | NULL\r | |
46 | );\r | |
47 | ASSERT_EFI_ERROR (Status);\r | |
48 | }\r | |
49 | \r | |
50 | /**\r | |
51 | Event notification that initialize CPU features when gEfiSmmConfigurationProtocol installs.\r | |
52 | \r | |
53 | @param[in] Event The Event that is being processed, not used.\r | |
54 | @param[in] Context Event Context, not used.\r | |
55 | **/\r | |
56 | VOID\r | |
57 | EFIAPI\r | |
58 | SmmConfigurationEventNotify (\r | |
053e878b MK |
59 | IN EFI_EVENT Event,\r |
60 | IN VOID *Context\r | |
80c4b236 JF |
61 | )\r |
62 | {\r | |
053e878b MK |
63 | EFI_STATUS Status;\r |
64 | EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration;\r | |
80c4b236 JF |
65 | \r |
66 | //\r | |
67 | // Make sure this notification is for this handler\r | |
68 | //\r | |
69 | Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **)&SmmConfiguration);\r | |
70 | if (EFI_ERROR (Status)) {\r | |
71 | return;\r | |
72 | }\r | |
73 | \r | |
74 | CpuFeaturesInitializeWorker ();\r | |
75 | }\r | |
76 | \r | |
77 | /**\r | |
78 | CPU Features driver entry point function.\r | |
79 | \r | |
80 | If PcdCpuFeaturesInitAfterSmmRelocation is TRUE, it will register one\r | |
81 | SMM Configuration Protocol notify function to perform CPU features\r | |
82 | initialization. Otherwise, it will perform CPU features initialization\r | |
83 | directly.\r | |
84 | \r | |
85 | @param ImageHandle Image handle this driver.\r | |
86 | @param SystemTable Pointer to the System Table.\r | |
87 | \r | |
88 | @retval EFI_SUCCESS CPU Features is initialized successfully.\r | |
89 | **/\r | |
90 | EFI_STATUS\r | |
91 | EFIAPI\r | |
92 | CpuFeaturesDxeInitialize (\r | |
053e878b MK |
93 | IN EFI_HANDLE ImageHandle,\r |
94 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
80c4b236 JF |
95 | )\r |
96 | {\r | |
97 | VOID *Registration;\r | |
bf5a306a ED |
98 | EFI_STATUS Status;\r |
99 | EFI_HANDLE Handle;\r | |
100 | \r | |
101 | if (GetFirstGuidHob (&gEdkiiCpuFeaturesInitDoneGuid) != NULL) {\r | |
102 | //\r | |
7367cc6c LG |
103 | // Try to find HOB first. This HOB exist means CPU features have\r |
104 | // been initialized by CpuFeaturesPei driver, just install\r | |
bf5a306a ED |
105 | // gEdkiiCpuFeaturesInitDoneGuid.\r |
106 | //\r | |
107 | Handle = NULL;\r | |
108 | Status = gBS->InstallProtocolInterface (\r | |
109 | &Handle,\r | |
110 | &gEdkiiCpuFeaturesInitDoneGuid,\r | |
111 | EFI_NATIVE_INTERFACE,\r | |
112 | NULL\r | |
113 | );\r | |
114 | ASSERT_EFI_ERROR (Status);\r | |
115 | return Status;\r | |
116 | }\r | |
80c4b236 JF |
117 | \r |
118 | if (PcdGetBool (PcdCpuFeaturesInitAfterSmmRelocation)) {\r | |
119 | //\r | |
120 | // Install notification callback on SMM Configuration Protocol\r | |
121 | //\r | |
122 | EfiCreateProtocolNotifyEvent (\r | |
123 | &gEfiSmmConfigurationProtocolGuid,\r | |
124 | TPL_CALLBACK,\r | |
125 | SmmConfigurationEventNotify,\r | |
126 | NULL,\r | |
127 | &Registration\r | |
128 | );\r | |
129 | } else {\r | |
130 | CpuFeaturesInitializeWorker ();\r | |
131 | }\r | |
132 | \r | |
133 | return EFI_SUCCESS;\r | |
134 | }\r |