diff options
Diffstat (limited to 'MdeModulePkg/Universal')
| -rw-r--r-- | MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c | 981 |
1 files changed, 502 insertions, 479 deletions
diff --git a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c index 3cb2c6bcf3..2aa2946904 100644 --- a/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c +++ b/MdeModulePkg/Universal/Variable/RuntimeDxe/VariableDxe.c @@ -1,479 +1,502 @@ -/** @file
-
- Implement all four UEFI Runtime Variable services for the nonvolatile
- and volatile storage space and install variable architecture protocol.
-
-Copyright (c) 2006 - 2013, 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"
-
-extern VARIABLE_STORE_HEADER *mNvVariableCache;
-extern VARIABLE_INFO_ENTRY *gVariableInfo;
-EFI_HANDLE mHandle = NULL;
-EFI_EVENT mVirtualAddressChangeEvent = NULL;
-EFI_EVENT mFtwRegistration = NULL;
-extern BOOLEAN mEndOfDxe;
-EDKII_VARIABLE_LOCK_PROTOCOL mVariableLock = { VariableLockRequestToLock };
-
-/**
- Return TRUE if ExitBootServices () has been called.
-
- @retval TRUE If ExitBootServices () has been called.
-**/
-BOOLEAN
-AtRuntime (
- VOID
- )
-{
- return EfiAtRuntime ();
-}
-
-
-/**
- Initializes a basic mutual exclusion lock.
-
- This function initializes a basic mutual exclusion lock to the released state
- and returns the lock. Each lock provides mutual exclusion access at its task
- priority level. Since there is no preemption or multiprocessor support in EFI,
- acquiring the lock only consists of raising to the locks TPL.
- If Lock is NULL, then ASSERT().
- If Priority is not a valid TPL value, then ASSERT().
-
- @param Lock A pointer to the lock data structure to initialize.
- @param Priority EFI TPL is associated with the lock.
-
- @return The lock.
-
-**/
-EFI_LOCK *
-InitializeLock (
- IN OUT EFI_LOCK *Lock,
- IN EFI_TPL Priority
- )
-{
- return EfiInitializeLock (Lock, Priority);
-}
-
-
-/**
- Acquires lock only at boot time. Simply returns at runtime.
-
- This is a temperary function that will be removed when
- EfiAcquireLock() in UefiLib can handle the call in UEFI
- Runtimer driver in RT phase.
- It calls EfiAcquireLock() at boot time, and simply returns
- at runtime.
-
- @param Lock A pointer to the lock to acquire.
-
-**/
-VOID
-AcquireLockOnlyAtBootTime (
- IN EFI_LOCK *Lock
- )
-{
- if (!AtRuntime ()) {
- EfiAcquireLock (Lock);
- }
-}
-
-
-/**
- Releases lock only at boot time. Simply returns at runtime.
-
- This is a temperary function which will be removed when
- EfiReleaseLock() in UefiLib can handle the call in UEFI
- Runtimer driver in RT phase.
- It calls EfiReleaseLock() at boot time and simply returns
- at runtime.
-
- @param Lock A pointer to the lock to release.
-
-**/
-VOID
-ReleaseLockOnlyAtBootTime (
- IN EFI_LOCK *Lock
- )
-{
- if (!AtRuntime ()) {
- EfiReleaseLock (Lock);
- }
-}
-
-/**
- Retrive the Fault Tolerent Write protocol interface.
-
- @param[out] FtwProtocol The interface of Ftw protocol
-
- @retval EFI_SUCCESS The FTW protocol instance was found and returned in FtwProtocol.
- @retval EFI_NOT_FOUND The FTW protocol instance was not found.
- @retval EFI_INVALID_PARAMETER SarProtocol is NULL.
-
-**/
-EFI_STATUS
-GetFtwProtocol (
- OUT VOID **FtwProtocol
- )
-{
- EFI_STATUS Status;
-
- //
- // Locate Fault Tolerent Write protocol
- //
- Status = gBS->LocateProtocol (
- &gEfiFaultTolerantWriteProtocolGuid,
- NULL,
- FtwProtocol
- );
- return Status;
-}
-
-/**
- Retrive the FVB protocol interface by HANDLE.
-
- @param[in] FvBlockHandle The handle of FVB protocol that provides services for
- reading, writing, and erasing the target block.
- @param[out] FvBlock The interface of FVB protocol
-
- @retval EFI_SUCCESS The interface information for the specified protocol was returned.
- @retval EFI_UNSUPPORTED The device does not support the FVB protocol.
- @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL.
-
-**/
-EFI_STATUS
-GetFvbByHandle (
- IN EFI_HANDLE FvBlockHandle,
- OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock
- )
-{
- //
- // To get the FVB protocol interface on the handle
- //
- return gBS->HandleProtocol (
- FvBlockHandle,
- &gEfiFirmwareVolumeBlockProtocolGuid,
- (VOID **) FvBlock
- );
-}
-
-
-/**
- Function returns an array of handles that support the FVB protocol
- in a buffer allocated from pool.
-
- @param[out] NumberHandles The number of handles returned in Buffer.
- @param[out] Buffer A pointer to the buffer to return the requested
- array of handles that support FVB protocol.
-
- @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of
- handles in Buffer was returned in NumberHandles.
- @retval EFI_NOT_FOUND No FVB handle was found.
- @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results.
- @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL.
-
-**/
-EFI_STATUS
-GetFvbCountAndBuffer (
- OUT UINTN *NumberHandles,
- OUT EFI_HANDLE **Buffer
- )
-{
- EFI_STATUS Status;
-
- //
- // Locate all handles of Fvb protocol
- //
- Status = gBS->LocateHandleBuffer (
- ByProtocol,
- &gEfiFirmwareVolumeBlockProtocolGuid,
- NULL,
- NumberHandles,
- Buffer
- );
- return Status;
-}
-
-
-/**
- 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->FvbInstance->GetBlockSize);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->GetPhysicalAddress);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->GetAttributes);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->SetAttributes);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->Read);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->Write);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->EraseBlocks);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLangCodes);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->LangCodes);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLang);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.VolatileVariableBase);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.HobVariableBase);
- EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);
- EfiConvertPointer (0x0, (VOID **) &mNvVariableCache);
-}
-
-
-/**
- Notification function of EVT_GROUP_READY_TO_BOOT event group.
-
- This is a notification function registered on EVT_GROUP_READY_TO_BOOT event group.
- When the Boot Manager is about to load and execute a boot option, it reclaims variable
- storage if free size is below the threshold.
-
- @param Event Event whose notification function is being invoked.
- @param Context Pointer to the notification function's context.
-
-**/
-VOID
-EFIAPI
-OnReadyToBoot (
- EFI_EVENT Event,
- VOID *Context
- )
-{
- //
- // Set the End Of DXE bit in case the EFI_END_OF_DXE_EVENT_GROUP_GUID event is not signaled.
- //
- mEndOfDxe = TRUE;
- ReclaimForOS ();
- if (FeaturePcdGet (PcdVariableCollectStatistics)) {
- gBS->InstallConfigurationTable (&gEfiVariableGuid, gVariableInfo);
- }
-}
-
-/**
- Notification function of EFI_END_OF_DXE_EVENT_GROUP_GUID event group.
-
- This is a notification function registered on EFI_END_OF_DXE_EVENT_GROUP_GUID event group.
-
- @param Event Event whose notification function is being invoked.
- @param Context Pointer to the notification function's context.
-
-**/
-VOID
-EFIAPI
-OnEndOfDxe (
- EFI_EVENT Event,
- VOID *Context
- )
-{
- mEndOfDxe = TRUE;
-}
-
-/**
- Fault Tolerant Write protocol notification event handler.
-
- Non-Volatile variable write may needs FTW protocol to reclaim when
- writting variable.
-
- @param[in] Event Event whose notification function is being invoked.
- @param[in] Context Pointer to the notification function's context.
-
-**/
-VOID
-EFIAPI
-FtwNotificationEvent (
- IN EFI_EVENT Event,
- IN VOID *Context
- )
-{
- EFI_STATUS Status;
- EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol;
- EFI_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol;
- EFI_PHYSICAL_ADDRESS NvStorageVariableBase;
- EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;
- EFI_PHYSICAL_ADDRESS BaseAddress;
- UINT64 Length;
- EFI_PHYSICAL_ADDRESS VariableStoreBase;
- UINT64 VariableStoreLength;
-
- //
- // Ensure FTW protocol is installed.
- //
- Status = GetFtwProtocol ((VOID**) &FtwProtocol);
- if (EFI_ERROR (Status)) {
- return ;
- }
-
- //
- // Find the proper FVB protocol for variable.
- //
- NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64);
- if (NvStorageVariableBase == 0) {
- NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase);
- }
- Status = GetFvbInfoByAddress (NvStorageVariableBase, NULL, &FvbProtocol);
- if (EFI_ERROR (Status)) {
- return ;
- }
- mVariableModuleGlobal->FvbInstance = FvbProtocol;
-
- //
- // Mark the variable storage region of the FLASH as RUNTIME.
- //
- VariableStoreBase = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase;
- VariableStoreLength = ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase)->Size;
- BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK);
- Length = VariableStoreLength + (VariableStoreBase - BaseAddress);
- Length = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK);
-
- Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor);
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n"));
- } else {
- Status = gDS->SetMemorySpaceAttributes (
- BaseAddress,
- Length,
- GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME
- );
- if (EFI_ERROR (Status)) {
- DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n"));
- }
- }
-
- Status = VariableWriteServiceInitialize ();
- ASSERT_EFI_ERROR (Status);
-
- //
- // Install the Variable Write Architectural protocol.
- //
- Status = gBS->InstallProtocolInterface (
- &mHandle,
- &gEfiVariableWriteArchProtocolGuid,
- EFI_NATIVE_INTERFACE,
- NULL
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Close the notify event to avoid install gEfiVariableWriteArchProtocolGuid again.
- //
- gBS->CloseEvent (Event);
-
-}
-
-
-/**
- Variable 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 availible. It also registers
- a notification function for an 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_STATUS Status;
- EFI_EVENT ReadyToBootEvent;
- EFI_EVENT EndOfDxeEvent;
-
- Status = VariableCommonInitialize ();
- ASSERT_EFI_ERROR (Status);
-
- Status = gBS->InstallMultipleProtocolInterfaces (
- &mHandle,
- &gEdkiiVariableLockProtocolGuid,
- &mVariableLock,
- NULL
- );
- ASSERT_EFI_ERROR (Status);
-
- SystemTable->RuntimeServices->GetVariable = VariableServiceGetVariable;
- SystemTable->RuntimeServices->GetNextVariableName = VariableServiceGetNextVariableName;
- SystemTable->RuntimeServices->SetVariable = VariableServiceSetVariable;
- SystemTable->RuntimeServices->QueryVariableInfo = VariableServiceQueryVariableInfo;
-
- //
- // Now install the Variable Runtime Architectural protocol on a new handle.
- //
- Status = gBS->InstallProtocolInterface (
- &mHandle,
- &gEfiVariableArchProtocolGuid,
- EFI_NATIVE_INTERFACE,
- NULL
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Register FtwNotificationEvent () notify function.
- //
- EfiCreateProtocolNotifyEvent (
- &gEfiFaultTolerantWriteProtocolGuid,
- TPL_CALLBACK,
- FtwNotificationEvent,
- (VOID *)SystemTable,
- &mFtwRegistration
- );
-
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- TPL_NOTIFY,
- VariableClassAddressChangeEvent,
- NULL,
- &gEfiEventVirtualAddressChangeGuid,
- &mVirtualAddressChangeEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Register the event handling function to reclaim variable for OS usage.
- //
- Status = EfiCreateEventReadyToBootEx (
- TPL_NOTIFY,
- OnReadyToBoot,
- NULL,
- &ReadyToBootEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- //
- // Register the event handling function to set the End Of DXE flag.
- //
- Status = gBS->CreateEventEx (
- EVT_NOTIFY_SIGNAL,
- TPL_NOTIFY,
- OnEndOfDxe,
- NULL,
- &gEfiEndOfDxeEventGroupGuid,
- &EndOfDxeEvent
- );
- ASSERT_EFI_ERROR (Status);
-
- return EFI_SUCCESS;
-}
-
+/** @file + + Implement all four UEFI Runtime Variable services for the nonvolatile + and volatile storage space and install variable architecture protocol. + +Copyright (C) 2013, Red Hat, Inc. +Copyright (c) 2006 - 2013, 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" + +extern VARIABLE_STORE_HEADER *mNvVariableCache; +extern VARIABLE_INFO_ENTRY *gVariableInfo; +EFI_HANDLE mHandle = NULL; +EFI_EVENT mVirtualAddressChangeEvent = NULL; +EFI_EVENT mFtwRegistration = NULL; +extern LIST_ENTRY mLockedVariableList; +extern BOOLEAN mEndOfDxe; +EDKII_VARIABLE_LOCK_PROTOCOL mVariableLock = { VariableLockRequestToLock }; + +/** + Return TRUE if ExitBootServices () has been called. + + @retval TRUE If ExitBootServices () has been called. +**/ +BOOLEAN +AtRuntime ( + VOID + ) +{ + return EfiAtRuntime (); +} + + +/** + Initializes a basic mutual exclusion lock. + + This function initializes a basic mutual exclusion lock to the released state + and returns the lock. Each lock provides mutual exclusion access at its task + priority level. Since there is no preemption or multiprocessor support in EFI, + acquiring the lock only consists of raising to the locks TPL. + If Lock is NULL, then ASSERT(). + If Priority is not a valid TPL value, then ASSERT(). + + @param Lock A pointer to the lock data structure to initialize. + @param Priority EFI TPL is associated with the lock. + + @return The lock. + +**/ +EFI_LOCK * +InitializeLock ( + IN OUT EFI_LOCK *Lock, + IN EFI_TPL Priority + ) +{ + return EfiInitializeLock (Lock, Priority); +} + + +/** + Acquires lock only at boot time. Simply returns at runtime. + + This is a temperary function that will be removed when + EfiAcquireLock() in UefiLib can handle the call in UEFI + Runtimer driver in RT phase. + It calls EfiAcquireLock() at boot time, and simply returns + at runtime. + + @param Lock A pointer to the lock to acquire. + +**/ +VOID +AcquireLockOnlyAtBootTime ( + IN EFI_LOCK *Lock + ) +{ + if (!AtRuntime ()) { + EfiAcquireLock (Lock); + } +} + + +/** + Releases lock only at boot time. Simply returns at runtime. + + This is a temperary function which will be removed when + EfiReleaseLock() in UefiLib can handle the call in UEFI + Runtimer driver in RT phase. + It calls EfiReleaseLock() at boot time and simply returns + at runtime. + + @param Lock A pointer to the lock to release. + +**/ +VOID +ReleaseLockOnlyAtBootTime ( + IN EFI_LOCK *Lock + ) +{ + if (!AtRuntime ()) { + EfiReleaseLock (Lock); + } +} + +/** + Retrive the Fault Tolerent Write protocol interface. + + @param[out] FtwProtocol The interface of Ftw protocol + + @retval EFI_SUCCESS The FTW protocol instance was found and returned in FtwProtocol. + @retval EFI_NOT_FOUND The FTW protocol instance was not found. + @retval EFI_INVALID_PARAMETER SarProtocol is NULL. + +**/ +EFI_STATUS +GetFtwProtocol ( + OUT VOID **FtwProtocol + ) +{ + EFI_STATUS Status; + + // + // Locate Fault Tolerent Write protocol + // + Status = gBS->LocateProtocol ( + &gEfiFaultTolerantWriteProtocolGuid, + NULL, + FtwProtocol + ); + return Status; +} + +/** + Retrive the FVB protocol interface by HANDLE. + + @param[in] FvBlockHandle The handle of FVB protocol that provides services for + reading, writing, and erasing the target block. + @param[out] FvBlock The interface of FVB protocol + + @retval EFI_SUCCESS The interface information for the specified protocol was returned. + @retval EFI_UNSUPPORTED The device does not support the FVB protocol. + @retval EFI_INVALID_PARAMETER FvBlockHandle is not a valid EFI_HANDLE or FvBlock is NULL. + +**/ +EFI_STATUS +GetFvbByHandle ( + IN EFI_HANDLE FvBlockHandle, + OUT EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL **FvBlock + ) +{ + // + // To get the FVB protocol interface on the handle + // + return gBS->HandleProtocol ( + FvBlockHandle, + &gEfiFirmwareVolumeBlockProtocolGuid, + (VOID **) FvBlock + ); +} + + +/** + Function returns an array of handles that support the FVB protocol + in a buffer allocated from pool. + + @param[out] NumberHandles The number of handles returned in Buffer. + @param[out] Buffer A pointer to the buffer to return the requested + array of handles that support FVB protocol. + + @retval EFI_SUCCESS The array of handles was returned in Buffer, and the number of + handles in Buffer was returned in NumberHandles. + @retval EFI_NOT_FOUND No FVB handle was found. + @retval EFI_OUT_OF_RESOURCES There is not enough pool memory to store the matching results. + @retval EFI_INVALID_PARAMETER NumberHandles is NULL or Buffer is NULL. + +**/ +EFI_STATUS +GetFvbCountAndBuffer ( + OUT UINTN *NumberHandles, + OUT EFI_HANDLE **Buffer + ) +{ + EFI_STATUS Status; + + // + // Locate all handles of Fvb protocol + // + Status = gBS->LocateHandleBuffer ( + ByProtocol, + &gEfiFirmwareVolumeBlockProtocolGuid, + NULL, + NumberHandles, + Buffer + ); + return Status; +} + + +/** + 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 + ) +{ + LIST_ENTRY *Link; + VARIABLE_ENTRY *Entry; + EFI_STATUS Status; + + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->GetBlockSize); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->GetPhysicalAddress); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->GetAttributes); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->SetAttributes); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->Read); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->Write); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance->EraseBlocks); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->FvbInstance); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLangCodes); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->LangCodes); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLang); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.VolatileVariableBase); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->VariableGlobal.HobVariableBase); + EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal); + EfiConvertPointer (0x0, (VOID **) &mNvVariableCache); + + // + // in the list of locked variables, convert the name pointers first + // + for ( Link = GetFirstNode (&mLockedVariableList) + ; !IsNull (&mLockedVariableList, Link) + ; Link = GetNextNode (&mLockedVariableList, Link) + ) { + Entry = BASE_CR (Link, VARIABLE_ENTRY, Link); + Status = EfiConvertPointer (0x0, (VOID **) &Entry->Name); + ASSERT_EFI_ERROR (Status); + } + // + // second, convert the list itself using UefiRuntimeLib + // + Status = EfiConvertList (0x0, &mLockedVariableList); + ASSERT_EFI_ERROR (Status); +} + + +/** + Notification function of EVT_GROUP_READY_TO_BOOT event group. + + This is a notification function registered on EVT_GROUP_READY_TO_BOOT event group. + When the Boot Manager is about to load and execute a boot option, it reclaims variable + storage if free size is below the threshold. + + @param Event Event whose notification function is being invoked. + @param Context Pointer to the notification function's context. + +**/ +VOID +EFIAPI +OnReadyToBoot ( + EFI_EVENT Event, + VOID *Context + ) +{ + // + // Set the End Of DXE bit in case the EFI_END_OF_DXE_EVENT_GROUP_GUID event is not signaled. + // + mEndOfDxe = TRUE; + ReclaimForOS (); + if (FeaturePcdGet (PcdVariableCollectStatistics)) { + gBS->InstallConfigurationTable (&gEfiVariableGuid, gVariableInfo); + } +} + +/** + Notification function of EFI_END_OF_DXE_EVENT_GROUP_GUID event group. + + This is a notification function registered on EFI_END_OF_DXE_EVENT_GROUP_GUID event group. + + @param Event Event whose notification function is being invoked. + @param Context Pointer to the notification function's context. + +**/ +VOID +EFIAPI +OnEndOfDxe ( + EFI_EVENT Event, + VOID *Context + ) +{ + mEndOfDxe = TRUE; +} + +/** + Fault Tolerant Write protocol notification event handler. + + Non-Volatile variable write may needs FTW protocol to reclaim when + writting variable. + + @param[in] Event Event whose notification function is being invoked. + @param[in] Context Pointer to the notification function's context. + +**/ +VOID +EFIAPI +FtwNotificationEvent ( + IN EFI_EVENT Event, + IN VOID *Context + ) +{ + EFI_STATUS Status; + EFI_FIRMWARE_VOLUME_BLOCK_PROTOCOL *FvbProtocol; + EFI_FAULT_TOLERANT_WRITE_PROTOCOL *FtwProtocol; + EFI_PHYSICAL_ADDRESS NvStorageVariableBase; + EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor; + EFI_PHYSICAL_ADDRESS BaseAddress; + UINT64 Length; + EFI_PHYSICAL_ADDRESS VariableStoreBase; + UINT64 VariableStoreLength; + + // + // Ensure FTW protocol is installed. + // + Status = GetFtwProtocol ((VOID**) &FtwProtocol); + if (EFI_ERROR (Status)) { + return ; + } + + // + // Find the proper FVB protocol for variable. + // + NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet64 (PcdFlashNvStorageVariableBase64); + if (NvStorageVariableBase == 0) { + NvStorageVariableBase = (EFI_PHYSICAL_ADDRESS) PcdGet32 (PcdFlashNvStorageVariableBase); + } + Status = GetFvbInfoByAddress (NvStorageVariableBase, NULL, &FvbProtocol); + if (EFI_ERROR (Status)) { + return ; + } + mVariableModuleGlobal->FvbInstance = FvbProtocol; + + // + // Mark the variable storage region of the FLASH as RUNTIME. + // + VariableStoreBase = mVariableModuleGlobal->VariableGlobal.NonVolatileVariableBase; + VariableStoreLength = ((VARIABLE_STORE_HEADER *)(UINTN)VariableStoreBase)->Size; + BaseAddress = VariableStoreBase & (~EFI_PAGE_MASK); + Length = VariableStoreLength + (VariableStoreBase - BaseAddress); + Length = (Length + EFI_PAGE_SIZE - 1) & (~EFI_PAGE_MASK); + + Status = gDS->GetMemorySpaceDescriptor (BaseAddress, &GcdDescriptor); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n")); + } else { + Status = gDS->SetMemorySpaceAttributes ( + BaseAddress, + Length, + GcdDescriptor.Attributes | EFI_MEMORY_RUNTIME + ); + if (EFI_ERROR (Status)) { + DEBUG ((DEBUG_WARN, "Variable driver failed to add EFI_MEMORY_RUNTIME attribute to Flash.\n")); + } + } + + Status = VariableWriteServiceInitialize (); + ASSERT_EFI_ERROR (Status); + + // + // Install the Variable Write Architectural protocol. + // + Status = gBS->InstallProtocolInterface ( + &mHandle, + &gEfiVariableWriteArchProtocolGuid, + EFI_NATIVE_INTERFACE, + NULL + ); + ASSERT_EFI_ERROR (Status); + + // + // Close the notify event to avoid install gEfiVariableWriteArchProtocolGuid again. + // + gBS->CloseEvent (Event); + +} + + +/** + Variable 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 availible. It also registers + a notification function for an 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_STATUS Status; + EFI_EVENT ReadyToBootEvent; + EFI_EVENT EndOfDxeEvent; + + Status = VariableCommonInitialize (); + ASSERT_EFI_ERROR (Status); + + Status = gBS->InstallMultipleProtocolInterfaces ( + &mHandle, + &gEdkiiVariableLockProtocolGuid, + &mVariableLock, + NULL + ); + ASSERT_EFI_ERROR (Status); + + SystemTable->RuntimeServices->GetVariable = VariableServiceGetVariable; + SystemTable->RuntimeServices->GetNextVariableName = VariableServiceGetNextVariableName; + SystemTable->RuntimeServices->SetVariable = VariableServiceSetVariable; + SystemTable->RuntimeServices->QueryVariableInfo = VariableServiceQueryVariableInfo; + + // + // Now install the Variable Runtime Architectural protocol on a new handle. + // + Status = gBS->InstallProtocolInterface ( + &mHandle, + &gEfiVariableArchProtocolGuid, + EFI_NATIVE_INTERFACE, + NULL + ); + ASSERT_EFI_ERROR (Status); + + // + // Register FtwNotificationEvent () notify function. + // + EfiCreateProtocolNotifyEvent ( + &gEfiFaultTolerantWriteProtocolGuid, + TPL_CALLBACK, + FtwNotificationEvent, + (VOID *)SystemTable, + &mFtwRegistration + ); + + Status = gBS->CreateEventEx ( + EVT_NOTIFY_SIGNAL, + TPL_NOTIFY, + VariableClassAddressChangeEvent, + NULL, + &gEfiEventVirtualAddressChangeGuid, + &mVirtualAddressChangeEvent + ); + ASSERT_EFI_ERROR (Status); + + // + // Register the event handling function to reclaim variable for OS usage. + // + Status = EfiCreateEventReadyToBootEx ( + TPL_NOTIFY, + OnReadyToBoot, + NULL, + &ReadyToBootEvent + ); + ASSERT_EFI_ERROR (Status); + + // + // Register the event handling function to set the End Of DXE flag. + // + Status = gBS->CreateEventEx ( + EVT_NOTIFY_SIGNAL, + TPL_NOTIFY, + OnEndOfDxe, + NULL, + &gEfiEndOfDxeEventGroupGuid, + &EndOfDxeEvent + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + |