diff options
Diffstat (limited to 'Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig')
| -rw-r--r-- | Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c | 139 | ||||
| -rw-r--r-- | Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf | 52 |
2 files changed, 191 insertions, 0 deletions
diff --git a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c new file mode 100644 index 0000000000..a142206141 --- /dev/null +++ b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.c @@ -0,0 +1,139 @@ +/** @file
+ This is the driver that locates the MemoryConfigurationData HOB, if it
+ exists, and saves the data to nvRAM.
+
+Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+This program and the accompanying materials are licensed and made available under
+the terms and conditions of the BSD License that accompanies this distribution.
+The full text of the license may be found at
+http://opensource.org/licenses/bsd-license.php.
+
+THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+
+**/
+
+#include <Base.h>
+#include <Uefi.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Library/UefiRuntimeServicesTableLib.h>
+#include <Library/HobLib.h>
+#include <Library/DebugLib.h>
+#include <Guid/GlobalVariable.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/BaseMemoryLib.h>
+#include <Protocol/VariableLock.h>
+
+/**
+ This is the standard EFI driver point that detects whether there is a
+ MemoryConfigurationData HOB and, if so, saves its data to nvRAM.
+
+ @param[in] ImageHandle Handle for the image of this driver
+ @param[in] SystemTable Pointer to the EFI System Table
+
+ @retval EFI_UNSUPPORTED
+**/
+EFI_STATUS
+EFIAPI
+SaveMemoryConfigEntryPoint (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_STATUS Status;
+ VOID *HobList;
+ EFI_HOB_GUID_TYPE *GuidHob;
+ VOID *HobData;
+ VOID *VariableData;
+ UINTN DataSize;
+ UINTN BufferSize;
+ EDKII_VARIABLE_LOCK_PROTOCOL *VariableLock;
+
+ DataSize = 0;
+ VariableData = NULL;
+ GuidHob = NULL;
+ HobList = NULL;
+ HobData = NULL;
+
+ //
+ // Get the HOB list. If it is not present, then ASSERT.
+ //
+ HobList = GetHobList ();
+ ASSERT (HobList != NULL);
+
+ //
+ // Search for the Memory Configuration GUID HOB. If it is not present, then
+ // there's nothing we can do. It may not exist on the update path.
+ //
+ GuidHob = GetNextGuidHob (&gFspNonVolatileStorageHobGuid, HobList);
+ if (GuidHob != NULL) {
+ HobData = GET_GUID_HOB_DATA (GuidHob);
+ DataSize = GET_GUID_HOB_DATA_SIZE(GuidHob);
+ if (DataSize > 0) {
+ //
+ // Use the HOB to save Memory Configuration Data
+ //
+ BufferSize = DataSize;
+ VariableData = AllocatePool (BufferSize);
+ if (VariableData == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+ Status = gRT->GetVariable (
+ L"MemoryConfig",
+ &gFspNonVolatileStorageHobGuid,
+ NULL,
+ &BufferSize,
+ VariableData
+ );
+
+ if (Status == EFI_BUFFER_TOO_SMALL) {
+ FreePool (VariableData);
+ VariableData = AllocatePool (BufferSize);
+ if (VariableData == NULL) {
+ return EFI_UNSUPPORTED;
+ }
+
+ Status = gRT->GetVariable (
+ L"MemoryConfig",
+ &gFspNonVolatileStorageHobGuid,
+ NULL,
+ &BufferSize,
+ VariableData
+ );
+ }
+
+ if ( (EFI_ERROR(Status)) || BufferSize != DataSize || 0 != CompareMem (HobData, VariableData, DataSize)) {
+ Status = gRT->SetVariable (
+ L"MemoryConfig",
+ &gFspNonVolatileStorageHobGuid,
+ (EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS),
+ DataSize,
+ HobData
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ DEBUG((DEBUG_INFO, "Restored Size is 0x%x\n", DataSize));
+ }
+
+ //
+ // Mark MemoryConfig to read-only if the Variable Lock protocol exists
+ //
+ Status = gBS->LocateProtocol(&gEdkiiVariableLockProtocolGuid, NULL, (VOID **)&VariableLock);
+ if (!EFI_ERROR(Status)) {
+ Status = VariableLock->RequestToLock(VariableLock, L"MemoryConfig", &gFspNonVolatileStorageHobGuid);
+ ASSERT_EFI_ERROR(Status);
+ }
+
+ (gBS->FreePool)(VariableData);
+ } else {
+ DEBUG((DEBUG_INFO, "Memory save size is %d\n", DataSize));
+ }
+ } else {
+ DEBUG((DEBUG_ERROR, "Memory S3 Data HOB was not found\n"));
+ }
+
+ //
+ // This driver does not produce any protocol services, so always unload it.
+ //
+ return EFI_UNSUPPORTED;
+}
diff --git a/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf new file mode 100644 index 0000000000..03f50cf2c8 --- /dev/null +++ b/Platform/Intel/MinPlatformPkg/FspWrapper/SaveMemoryConfig/SaveMemoryConfig.inf @@ -0,0 +1,52 @@ +### @file
+# Component information file for SaveMemoryConfig module
+#
+# Copyright (c) 2017, Intel Corporation. All rights reserved.<BR>
+#
+# This program and the accompanying materials are licensed and made available under
+# the terms and conditions of the BSD License which accompanies this distribution.
+# The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+#
+###
+
+[Defines]
+ INF_VERSION = 0x00010017
+ BASE_NAME = SaveMemoryConfig
+ FILE_GUID = E0ECBEC9-B193-4351-A488-36A655F22F9F
+ VERSION_STRING = 1.0
+ MODULE_TYPE = DXE_DRIVER
+ ENTRY_POINT = SaveMemoryConfigEntryPoint
+
+[LibraryClasses]
+ UefiDriverEntryPoint
+ UefiBootServicesTableLib
+ UefiRuntimeServicesTableLib
+ HobLib
+ DebugLib
+ MemoryAllocationLib
+ BaseMemoryLib
+
+[Packages]
+ MdePkg/MdePkg.dec
+ MdeModulePkg/MdeModulePkg.dec
+ IntelFsp2Pkg/IntelFsp2Pkg.dec
+
+[Sources]
+ SaveMemoryConfig.c
+
+[Protocols]
+ gEfiVariableArchProtocolGuid ## CONSUMES
+ gEfiVariableWriteArchProtocolGuid ## CONSUMES
+ gEdkiiVariableLockProtocolGuid
+
+[Guids]
+ gFspNonVolatileStorageHobGuid ## CONSUMES
+
+[Depex]
+ gEfiVariableArchProtocolGuid AND
+ gEfiVariableWriteArchProtocolGuid AND
+ gEfiResetArchProtocolGuid
\ No newline at end of file |