diff options
Diffstat (limited to 'Core/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c')
| -rw-r--r-- | Core/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/Core/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c b/Core/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c new file mode 100644 index 0000000000..d636fcf20d --- /dev/null +++ b/Core/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/InitVariable.c @@ -0,0 +1,250 @@ +/** @file
+
+ Implment all four UEFI runtime variable services and
+ install variable architeture protocol.
+
+Copyright (c) 2006 - 2010, 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.
+
+**/
+
+#include "Variable.h"
+
+EFI_EVENT mVirtualAddressChangeEvent = NULL;
+
+/**
+
+ This code finds variable in storage blocks (Volatile or Non-Volatile).
+
+ @param VariableName Name of Variable to be found.
+ @param VendorGuid Variable vendor GUID.
+ @param Attributes Attribute value of the variable found.
+ @param DataSize Size of Data found. If size is less than the
+ data, this value contains the required size.
+ @param Data Data pointer.
+
+ @return EFI_INVALID_PARAMETER Invalid parameter
+ @return EFI_SUCCESS Find the specified variable
+ @return EFI_NOT_FOUND Not found
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result
+
+**/
+EFI_STATUS
+EFIAPI
+RuntimeServiceGetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ OUT UINT32 *Attributes OPTIONAL,
+ IN OUT UINTN *DataSize,
+ OUT VOID *Data
+ )
+{
+ return EmuGetVariable (
+ VariableName,
+ VendorGuid,
+ Attributes OPTIONAL,
+ DataSize,
+ Data,
+ &mVariableModuleGlobal->VariableGlobal[Physical]
+ );
+}
+
+/**
+
+ This code Finds the Next available variable.
+
+ @param VariableNameSize Size of the variable name
+ @param VariableName Pointer to variable name
+ @param VendorGuid Variable Vendor Guid
+
+ @return EFI_INVALID_PARAMETER Invalid parameter
+ @return EFI_SUCCESS Find the specified variable
+ @return EFI_NOT_FOUND Not found
+ @return EFI_BUFFER_TO_SMALL DataSize is too small for the result
+
+**/
+EFI_STATUS
+EFIAPI
+RuntimeServiceGetNextVariableName (
+ IN OUT UINTN *VariableNameSize,
+ IN OUT CHAR16 *VariableName,
+ IN OUT EFI_GUID *VendorGuid
+ )
+{
+ return EmuGetNextVariableName (
+ VariableNameSize,
+ VariableName,
+ VendorGuid,
+ &mVariableModuleGlobal->VariableGlobal[Physical]
+ );
+}
+
+/**
+
+ This code sets variable in storage blocks (Volatile or Non-Volatile).
+
+ @param VariableName Name of Variable to be found
+ @param VendorGuid Variable vendor GUID
+ @param Attributes Attribute value of the variable found
+ @param DataSize Size of Data found. If size is less than the
+ data, this value contains the required size.
+ @param Data Data pointer
+
+ @return EFI_INVALID_PARAMETER Invalid parameter
+ @return EFI_SUCCESS Set successfully
+ @return EFI_OUT_OF_RESOURCES Resource not enough to set variable
+ @return EFI_NOT_FOUND Not found
+ @return EFI_WRITE_PROTECTED Variable is read-only
+
+**/
+EFI_STATUS
+EFIAPI
+RuntimeServiceSetVariable (
+ IN CHAR16 *VariableName,
+ IN EFI_GUID *VendorGuid,
+ IN UINT32 Attributes,
+ IN UINTN DataSize,
+ IN VOID *Data
+ )
+{
+ return EmuSetVariable (
+ VariableName,
+ VendorGuid,
+ Attributes,
+ DataSize,
+ Data,
+ &mVariableModuleGlobal->VariableGlobal[Physical],
+ &mVariableModuleGlobal->VolatileLastVariableOffset,
+ &mVariableModuleGlobal->NonVolatileLastVariableOffset
+ );
+}
+
+/**
+
+ This code returns information about the EFI variables.
+
+ @param Attributes Attributes bitmask to specify the type of variables
+ on which to return information.
+ @param MaximumVariableStorageSize Pointer to the maximum size of the storage space available
+ for the EFI variables associated with the attributes specified.
+ @param RemainingVariableStorageSize Pointer to the remaining size of the storage space available
+ for EFI variables associated with the attributes specified.
+ @param MaximumVariableSize Pointer to the maximum size of an individual EFI variables
+ associated with the attributes specified.
+
+ @return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.
+ @return EFI_SUCCESS Query successfully.
+ @return EFI_UNSUPPORTED The attribute is not supported on this platform.
+
+**/
+EFI_STATUS
+EFIAPI
+RuntimeServiceQueryVariableInfo (
+ IN UINT32 Attributes,
+ OUT UINT64 *MaximumVariableStorageSize,
+ OUT UINT64 *RemainingVariableStorageSize,
+ OUT UINT64 *MaximumVariableSize
+ )
+{
+ return EmuQueryVariableInfo (
+ Attributes,
+ MaximumVariableStorageSize,
+ RemainingVariableStorageSize,
+ MaximumVariableSize,
+ &mVariableModuleGlobal->VariableGlobal[Physical]
+ );
+}
+
+/**
+ Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.
+
+ This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
+ It convers pointer to new virtual address.
+
+ @param Event Event whose notification function is being invoked.
+ @param Context Pointer to the notification function's context.
+
+**/
+VOID
+EFIAPI
+VariableClassAddressChangeEvent (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLangCodes);
+ EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->LangCodes);
+ EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLang);
+ EfiConvertPointer (
+ 0x0,
+ (VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].NonVolatileVariableBase
+ );
+ EfiConvertPointer (
+ 0x0,
+ (VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].VolatileVariableBase
+ );
+ EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);
+}
+
+/**
+ EmuVariable Driver main entry point. The Variable driver places the 4 EFI
+ runtime services in the EFI System Table and installs arch protocols
+ for variable read and write services being available. It also registers
+ notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.
+
+ @param[in] ImageHandle The firmware allocated handle for the EFI image.
+ @param[in] SystemTable A pointer to the EFI System Table.
+
+ @retval EFI_SUCCESS Variable service successfully initialized.
+
+**/
+EFI_STATUS
+EFIAPI
+VariableServiceInitialize (
+ IN EFI_HANDLE ImageHandle,
+ IN EFI_SYSTEM_TABLE *SystemTable
+ )
+{
+ EFI_HANDLE NewHandle;
+ EFI_STATUS Status;
+
+ Status = VariableCommonInitialize (ImageHandle, SystemTable);
+ ASSERT_EFI_ERROR (Status);
+
+ SystemTable->RuntimeServices->GetVariable = RuntimeServiceGetVariable;
+ SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;
+ SystemTable->RuntimeServices->SetVariable = RuntimeServiceSetVariable;
+ SystemTable->RuntimeServices->QueryVariableInfo = RuntimeServiceQueryVariableInfo;
+
+ //
+ // Now install the Variable Runtime Architectural Protocol on a new handle
+ //
+ NewHandle = NULL;
+ Status = gBS->InstallMultipleProtocolInterfaces (
+ &NewHandle,
+ &gEfiVariableArchProtocolGuid,
+ NULL,
+ &gEfiVariableWriteArchProtocolGuid,
+ NULL,
+ NULL
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ Status = gBS->CreateEventEx (
+ EVT_NOTIFY_SIGNAL,
+ TPL_NOTIFY,
+ VariableClassAddressChangeEvent,
+ NULL,
+ &gEfiEventVirtualAddressChangeGuid,
+ &mVirtualAddressChangeEvent
+ );
+ ASSERT_EFI_ERROR (Status);
+
+ return EFI_SUCCESS;
+}
|