]>
Commit | Line | Data |
---|---|---|
82e75ac6 JF |
1 | /** @file |
2 | CPU Features DXE driver to initialize CPU features. | |
3 | ||
4 | Copyright (c) 2017, Intel Corporation. All rights reserved.<BR> | |
5 | This program and the accompanying materials | |
6 | are licensed and made available under the terms and conditions of the BSD License | |
7 | which accompanies this distribution. The full text of the license may be found at | |
8 | http://opensource.org/licenses/bsd-license.php | |
9 | ||
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
12 | ||
13 | **/ | |
14 | ||
15 | #include <PiDxe.h> | |
16 | ||
17 | #include <Library/BaseLib.h> | |
18 | #include <Library/DebugLib.h> | |
19 | #include <Library/UefiLib.h> | |
20 | #include <Library/UefiBootServicesTableLib.h> | |
21 | #include <Library/RegisterCpuFeaturesLib.h> | |
22 | ||
23 | #include <Protocol/SmmConfiguration.h> | |
24 | #include <Guid/CpuFeaturesInitDone.h> | |
25 | ||
26 | ||
27 | /** | |
28 | Worker function to perform CPU feature initialization. | |
29 | ||
30 | **/ | |
31 | VOID | |
32 | CpuFeaturesInitializeWorker ( | |
33 | VOID | |
34 | ) | |
35 | { | |
36 | EFI_STATUS Status; | |
37 | EFI_HANDLE Handle; | |
38 | ||
39 | CpuFeaturesDetect (); | |
40 | ||
41 | CpuFeaturesInitialize (); | |
42 | ||
43 | // | |
44 | // Install CPU Features Init Done Protocol | |
45 | // | |
46 | Handle = NULL; | |
47 | Status = gBS->InstallProtocolInterface ( | |
48 | &Handle, | |
49 | &gEdkiiCpuFeaturesInitDoneGuid, | |
50 | EFI_NATIVE_INTERFACE, | |
51 | NULL | |
52 | ); | |
53 | ASSERT_EFI_ERROR (Status); | |
54 | } | |
55 | ||
56 | /** | |
57 | Event notification that initialize CPU features when gEfiSmmConfigurationProtocol installs. | |
58 | ||
59 | @param[in] Event The Event that is being processed, not used. | |
60 | @param[in] Context Event Context, not used. | |
61 | **/ | |
62 | VOID | |
63 | EFIAPI | |
64 | SmmConfigurationEventNotify ( | |
65 | IN EFI_EVENT Event, | |
66 | IN VOID *Context | |
67 | ) | |
68 | { | |
69 | EFI_STATUS Status; | |
70 | EFI_SMM_CONFIGURATION_PROTOCOL *SmmConfiguration; | |
71 | ||
72 | // | |
73 | // Make sure this notification is for this handler | |
74 | // | |
75 | Status = gBS->LocateProtocol (&gEfiSmmConfigurationProtocolGuid, NULL, (VOID **)&SmmConfiguration); | |
76 | if (EFI_ERROR (Status)) { | |
77 | return; | |
78 | } | |
79 | ||
80 | CpuFeaturesInitializeWorker (); | |
81 | } | |
82 | ||
83 | /** | |
84 | CPU Features driver entry point function. | |
85 | ||
86 | If PcdCpuFeaturesInitAfterSmmRelocation is TRUE, it will register one | |
87 | SMM Configuration Protocol notify function to perform CPU features | |
88 | initialization. Otherwise, it will perform CPU features initialization | |
89 | directly. | |
90 | ||
91 | @param ImageHandle Image handle this driver. | |
92 | @param SystemTable Pointer to the System Table. | |
93 | ||
94 | @retval EFI_SUCCESS CPU Features is initialized successfully. | |
95 | **/ | |
96 | EFI_STATUS | |
97 | EFIAPI | |
98 | CpuFeaturesDxeInitialize ( | |
99 | IN EFI_HANDLE ImageHandle, | |
100 | IN EFI_SYSTEM_TABLE *SystemTable | |
101 | ) | |
102 | { | |
103 | VOID *Registration; | |
104 | ||
105 | if (PcdGetBool (PcdCpuFeaturesInitAfterSmmRelocation)) { | |
106 | // | |
107 | // Install notification callback on SMM Configuration Protocol | |
108 | // | |
109 | EfiCreateProtocolNotifyEvent ( | |
110 | &gEfiSmmConfigurationProtocolGuid, | |
111 | TPL_CALLBACK, | |
112 | SmmConfigurationEventNotify, | |
113 | NULL, | |
114 | &Registration | |
115 | ); | |
116 | } else { | |
117 | CpuFeaturesInitializeWorker (); | |
118 | } | |
119 | ||
120 | return EFI_SUCCESS; | |
121 | } | |
122 |