3 Copyright (c) 2004 - 2014, Intel Corporation. All rights reserved.<BR>
5 This program and the accompanying materials are licensed and made available under
6 the terms and conditions of the BSD License that accompanies this distribution.
7 The full text of the license may be found at
8 http://opensource.org/licenses/bsd-license.php.
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.
19 Platform Info driver to public platform related HOB data
23 #include "PlatformInfoDxe.h"
26 Entry point for the driver.
28 This routine get the platform HOB data from PEI and publish
29 as Platform Info variable that can be accessed during boot service and
32 @param ImageHandle Image Handle.
33 @param SystemTable EFI System Table.
35 @retval Status Function execution status.
41 IN EFI_HANDLE ImageHandle
,
42 IN EFI_SYSTEM_TABLE
*SystemTable
46 EFI_PLATFORM_INFO_HOB
*PlatformInfoHobPtr
;
47 EFI_PEI_HOB_POINTERS GuidHob
;
48 EFI_PLATFORM_INFO_HOB TmpHob
;
50 EFI_OS_SELECTION_HOB
*OsSlectionHobPtr
;
52 SYSTEM_CONFIGURATION SystemConfiguration
;
53 UINT8
*LpssDataHobPtr
;
54 UINT8
*LpssDataVarPtr
;
57 VarSize
= sizeof(SYSTEM_CONFIGURATION
);
58 Status
= gRT
->GetVariable(
66 if (EFI_ERROR (Status
) || VarSize
!= sizeof(SYSTEM_CONFIGURATION
)) {
67 //The setup variable is corrupted
68 VarSize
= sizeof(SYSTEM_CONFIGURATION
);
69 Status
= gRT
->GetVariable(
76 ASSERT_EFI_ERROR (Status
);
79 VarSize
= sizeof(Selection
);
80 Status
= gRT
->GetVariable(
82 &gOsSelectionVariableGuid
,
88 if (EFI_ERROR(Status
)) {
89 Selection
= SystemConfiguration
.ReservedO
;
90 Status
= gRT
->SetVariable (
92 &gOsSelectionVariableGuid
,
93 EFI_VARIABLE_BOOTSERVICE_ACCESS
| EFI_VARIABLE_RUNTIME_ACCESS
| EFI_VARIABLE_NON_VOLATILE
,
99 GuidHob
.Raw
= GetHobList ();
100 if (GuidHob
.Raw
!= NULL
) {
101 if ((GuidHob
.Raw
= GetNextGuidHob (&gOsSelectionVariableGuid
, GuidHob
.Raw
)) != NULL
) {
102 OsSlectionHobPtr
= GET_GUID_HOB_DATA (GuidHob
.Guid
);
104 if (OsSlectionHobPtr
->OsSelectionChanged
) {
105 SystemConfiguration
.ReservedO
= OsSlectionHobPtr
->OsSelection
;
108 // Load Audio default configuration
110 SystemConfiguration
.Lpe
= OsSlectionHobPtr
->Lpe
;
111 SystemConfiguration
.PchAzalia
= OsSlectionHobPtr
->PchAzalia
;
114 // Load LPSS and SCC default configurations
116 LpssDataHobPtr
= &OsSlectionHobPtr
->LpssData
.LpssPciModeEnabled
;
117 LpssDataVarPtr
= &SystemConfiguration
.LpssPciModeEnabled
;
118 for (i
= 0; i
< sizeof(EFI_PLATFORM_LPSS_DATA
); i
++) {
119 *LpssDataVarPtr
= *LpssDataHobPtr
;
124 SystemConfiguration
.GOPEnable
= TRUE
;
126 Status
= gRT
->SetVariable (
128 &gEfiNormalSetupGuid
,
129 EFI_VARIABLE_BOOTSERVICE_ACCESS
| EFI_VARIABLE_NON_VOLATILE
,
130 sizeof(SYSTEM_CONFIGURATION
),
133 ASSERT_EFI_ERROR (Status
);
138 GuidHob
.Raw
= GetHobList ();
139 if (GuidHob
.Raw
== NULL
) {
140 return EFI_NOT_FOUND
;
143 if ((GuidHob
.Raw
= GetNextGuidHob (&gEfiPlatformInfoGuid
, GuidHob
.Raw
)) != NULL
) {
144 PlatformInfoHobPtr
= GET_GUID_HOB_DATA (GuidHob
.Guid
);
145 VarSize
= sizeof(EFI_PLATFORM_INFO_HOB
);
146 Status
= gRT
->GetVariable(
148 &gEfiVlv2VariableGuid
,
154 if (EFI_ERROR(Status
) || CompareMem (&TmpHob
, PlatformInfoHobPtr
, VarSize
)) {
157 // Write the Platform Info to volatile memory
159 Status
= gRT
->SetVariable(
161 &gEfiVlv2VariableGuid
,
162 EFI_VARIABLE_BOOTSERVICE_ACCESS
| EFI_VARIABLE_NON_VOLATILE
,
163 sizeof(EFI_PLATFORM_INFO_HOB
),
166 if (EFI_ERROR(Status
)) {