diff options
Diffstat (limited to 'EDK/Foundation/Library/EdkIIGlueLib/Library/UefiLib/UefiLib.c')
| -rw-r--r-- | EDK/Foundation/Library/EdkIIGlueLib/Library/UefiLib/UefiLib.c | 948 |
1 files changed, 948 insertions, 0 deletions
diff --git a/EDK/Foundation/Library/EdkIIGlueLib/Library/UefiLib/UefiLib.c b/EDK/Foundation/Library/EdkIIGlueLib/Library/UefiLib/UefiLib.c new file mode 100644 index 0000000..0174a82 --- /dev/null +++ b/EDK/Foundation/Library/EdkIIGlueLib/Library/UefiLib/UefiLib.c @@ -0,0 +1,948 @@ +/*++ + +Copyright (c) 2004 - 2011, Intel Corporation +All rights reserved. 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 "EdkIIGlueUefi.h" +#include "Library\EdkIIGlueMemoryAllocationLib.h" + + +/** + This function searches the list of configuration tables stored in the EFI System + Table for a table with a GUID that matches TableGuid. If a match is found, + then a pointer to the configuration table is returned in Table, and EFI_SUCCESS + is returned. If a matching GUID is not found, then EFI_NOT_FOUND is returned. + + @param TableGuid Pointer to table's GUID type.. + @param Table Pointer to the table associated with TableGuid in the EFI System Table. + + @retval EFI_SUCCESS A configuration table matching TableGuid was found. + @retval EFI_NOT_FOUND A configuration table matching TableGuid could not be found. + +**/ +EFI_STATUS +EFIAPI +EfiGetSystemConfigurationTable ( + IN EFI_GUID *TableGuid, + OUT VOID **Table + ) +{ + EFI_SYSTEM_TABLE *SystemTable; + UINTN Index; + + ASSERT (TableGuid != NULL); + ASSERT (Table != NULL); + + SystemTable = gST; + *Table = NULL; + for (Index = 0; Index < SystemTable->NumberOfTableEntries; Index++) { + if (CompareGuid (TableGuid, &(SystemTable->ConfigurationTable[Index].VendorGuid))) { + *Table = SystemTable->ConfigurationTable[Index].VendorTable; + return EFI_SUCCESS; + } + } + + return EFI_NOT_FOUND; +} + +/** + This function causes the notification function to be executed for every protocol + of type ProtocolGuid instance that exists in the system when this function is + invoked. In addition, every time a protocol of type ProtocolGuid instance is + installed or reinstalled, the notification function is also executed. + + @param ProtocolGuid Supplies GUID of the protocol upon whose installation the event is fired. + @param NotifyTpl Supplies the task priority level of the event notifications. + @param NotifyFunction Supplies the function to notify when the event is signaled. + @param NotifyContext The context parameter to pass to NotifyFunction. + @param Registration A pointer to a memory location to receive the registration value. + + @return The notification event that was created. + +**/ +EFI_EVENT +EFIAPI +EfiCreateProtocolNotifyEvent( + IN EFI_GUID *ProtocolGuid, + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN VOID *NotifyContext, OPTIONAL + OUT VOID **Registration + ) +{ + EFI_STATUS Status; + EFI_EVENT Event; + + // + // Create the event + // + + Status = gBS->CreateEvent ( + EFI_EVENT_NOTIFY_SIGNAL, + NotifyTpl, + NotifyFunction, + NotifyContext, + &Event + ); + ASSERT_EFI_ERROR (Status); + + // + // Register for protocol notifactions on this event + // + + Status = gBS->RegisterProtocolNotify ( + ProtocolGuid, + Event, + Registration + ); + + ASSERT_EFI_ERROR (Status); + + // + // Kick the event so we will perform an initial pass of + // current installed drivers + // + + gBS->SignalEvent (Event); + return Event; +} + +/** + This function creates an event using NotifyTpl, NoifyFunction, and NotifyContext. + This event is signaled with EfiNamedEventSignal(). This provide the ability for + one or more listeners on the same event named by the GUID specified by Name. + + @param Name Supplies GUID name of the event. + @param NotifyTpl Supplies the task priority level of the event notifications. + @param NotifyFunction Supplies the function to notify when the event is signaled. + @param NotifyContext The context parameter to pass to NotifyFunction. + @param Registration A pointer to a memory location to receive the registration value. + + @retval EFI_SUCCESS A named event was created. + @retval EFI_OUT_OF_RESOURCES There are not enough resource to create the named event. + +**/ +EFI_STATUS +EFIAPI +EfiNamedEventListen ( + IN CONST EFI_GUID *Name, + IN EFI_TPL NotifyTpl, + IN EFI_EVENT_NOTIFY NotifyFunction, + IN CONST VOID *NotifyContext, OPTIONAL + OUT VOID *Registration OPTIONAL + ) +{ + EFI_STATUS Status; + EFI_EVENT Event; + VOID *RegistrationLocal; + + // + // Create event + // + Status = gBS->CreateEvent ( + EFI_EVENT_NOTIFY_SIGNAL, + NotifyTpl, + NotifyFunction, + (VOID *) NotifyContext, + &Event + ); + ASSERT_EFI_ERROR (Status); + + // + // The Registration is not optional to RegisterProtocolNotify(). + // To make it optional to EfiNamedEventListen(), may need to substitute with a local. + // + if (Registration != NULL) { + RegistrationLocal = Registration; + } else { + RegistrationLocal = &RegistrationLocal; + } + + // + // Register for an installation of protocol interface + // + + Status = gBS->RegisterProtocolNotify ( + (EFI_GUID *) Name, + Event, + RegistrationLocal + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +/** + This function signals the named event specified by Name. The named event must + have been created with EfiNamedEventListen(). + + @param Name Supplies GUID name of the event. + + @retval EFI_SUCCESS A named event was signaled. + @retval EFI_OUT_OF_RESOURCES There are not enough resource to signal the named event. + +**/ +EFI_STATUS +EFIAPI +EfiNamedEventSignal ( + IN CONST EFI_GUID *Name + ) +{ + EFI_STATUS Status; + EFI_HANDLE Handle; + + Handle = NULL; + Status = gBS->InstallProtocolInterface ( + &Handle, + (EFI_GUID *) Name, + EFI_NATIVE_INTERFACE, + NULL + ); + ASSERT_EFI_ERROR (Status); + + Status = gBS->UninstallProtocolInterface ( + Handle, + (EFI_GUID *) Name, + NULL + ); + ASSERT_EFI_ERROR (Status); + + return EFI_SUCCESS; +} + +/** + Returns the current TPL. + + This function returns the current TPL. There is no EFI service to directly + retrieve the current TPL. Instead, the RaiseTPL() function is used to raise + the TPL to TPL_HIGH_LEVEL. This will return the current TPL. The TPL level + can then immediately be restored back to the current TPL level with a call + to RestoreTPL(). + + @param VOID + + @retvale EFI_TPL The current TPL. + +**/ +EFI_TPL +EFIAPI +EfiGetCurrentTpl ( + VOID + ) +{ + EFI_TPL Tpl; + + Tpl = gBS->RaiseTPL (EFI_TPL_HIGH_LEVEL); + gBS->RestoreTPL (Tpl); + + return Tpl; +} + + +/** + 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. + + @param Lock A pointer to the lock data structure to initialize. + @param Priority EFI TPL associated with the lock. + + @return The lock. + +**/ +EFI_LOCK * +EFIAPI +GlueEfiInitializeLock ( + IN OUT EFI_LOCK *Lock, + IN EFI_TPL Priority + ) +{ + ASSERT (Lock != NULL); + ASSERT (Priority <= EFI_TPL_HIGH_LEVEL); + + Lock->Tpl = Priority; + Lock->OwnerTpl = EFI_TPL_APPLICATION; + Lock->Lock = EfiLockReleased ; + return Lock; +} + +/** + This function raises the system's current task priority level to the task + priority level of the mutual exclusion lock. Then, it places the lock in the + acquired state. + + @param Priority The task priority level of the lock. + +**/ +VOID +EFIAPI +GlueEfiAcquireLock ( + IN EFI_LOCK *Lock + ) +{ + ASSERT (Lock != NULL); + ASSERT (Lock->Lock == EfiLockReleased); + + Lock->OwnerTpl = gBS->RaiseTPL (Lock->Tpl); + Lock->Lock = EfiLockAcquired; +} + +/** + This function raises the system's current task priority level to the task + priority level of the mutual exclusion lock. Then, it attempts to place the + lock in the acquired state. + + @param Lock A pointer to the lock to acquire. + + @retval EFI_SUCCESS The lock was acquired. + @retval EFI_ACCESS_DENIED The lock could not be acquired because it is already owned. + +**/ +EFI_STATUS +EFIAPI +GlueEfiAcquireLockOrFail ( + IN EFI_LOCK *Lock + ) +{ + + ASSERT (Lock != NULL); + ASSERT (Lock->Lock != EfiLockUninitialized); + + if (Lock->Lock == EfiLockAcquired) { + // + // Lock is already owned, so bail out + // + return EFI_ACCESS_DENIED; + } + + Lock->OwnerTpl = gBS->RaiseTPL (Lock->Tpl); + + Lock->Lock = EfiLockAcquired; + + return EFI_SUCCESS; +} + +/** + This function transitions a mutual exclusion lock from the acquired state to + the released state, and restores the system's task priority level to its + previous level. + + @param Lock A pointer to the lock to release. + +**/ +VOID +EFIAPI +GlueEfiReleaseLock ( + IN EFI_LOCK *Lock + ) +{ + EFI_TPL Tpl; + + ASSERT (Lock != NULL); + ASSERT (Lock->Lock == EfiLockAcquired); + + Tpl = Lock->OwnerTpl; + + Lock->Lock = EfiLockReleased; + + gBS->RestoreTPL (Tpl); +} + +/** + Tests whether a controller handle is being managed by a specific driver. + + This function tests whether the driver specified by DriverBindingHandle is + currently managing the controller specified by ControllerHandle. This test + is performed by evaluating if the the protocol specified by ProtocolGuid is + present on ControllerHandle and is was opened by DriverBindingHandle with an + attribute of EFI_OPEN_PROTOCOL_BY_DRIVER. + If ProtocolGuid is NULL, then ASSERT(). + + @param ControllerHandle A handle for a controller to test. + @param DriverBindingHandle Specifies the driver binding handle for the + driver. + @param ProtocolGuid Specifies the protocol that the driver specified + by DriverBindingHandle opens in its Start() + function. + + @retval EFI_SUCCESS ControllerHandle is managed by the driver + specifed by DriverBindingHandle. + @retval EFI_UNSUPPORTED ControllerHandle is not managed by the driver + specifed by DriverBindingHandle. + +**/ +EFI_STATUS +EFIAPI +EfiTestManagedDevice ( + IN CONST EFI_HANDLE ControllerHandle, + IN CONST EFI_HANDLE DriverBindingHandle, + IN CONST EFI_GUID *ProtocolGuid + ) +{ + EFI_STATUS Status; + VOID *ManagedInterface; + + ASSERT (ProtocolGuid != NULL); + + Status = gBS->OpenProtocol ( + ControllerHandle, + (EFI_GUID *) ProtocolGuid, + &ManagedInterface, + DriverBindingHandle, + ControllerHandle, + EFI_OPEN_PROTOCOL_BY_DRIVER + ); + if (!EFI_ERROR (Status)) { + gBS->CloseProtocol ( + ControllerHandle, + (EFI_GUID *) ProtocolGuid, + DriverBindingHandle, + ControllerHandle + ); + return EFI_UNSUPPORTED; + } + + if (Status != EFI_ALREADY_STARTED) { + return EFI_UNSUPPORTED; + } + + return EFI_SUCCESS; +} + +/** + Tests whether a child handle is a child device of the controller. + + This function tests whether ChildHandle is one of the children of + ControllerHandle. This test is performed by checking to see if the protocol + specified by ProtocolGuid is present on ControllerHandle and opened by + ChildHandle with an attribute of EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER. + If ProtocolGuid is NULL, then ASSERT(). + + @param ControllerHandle A handle for a (parent) controller to test. + @param ChildHandle A child handle to test. + @param ConsumsedGuid Supplies the protocol that the child controller + opens on its parent controller. + + @retval EFI_SUCCESS ChildHandle is a child of the ControllerHandle. + @retval EFI_UNSUPPORTED ChildHandle is not a child of the + ControllerHandle. + +**/ +EFI_STATUS +EFIAPI +EfiTestChildHandle ( + IN CONST EFI_HANDLE ControllerHandle, + IN CONST EFI_HANDLE ChildHandle, + IN CONST EFI_GUID *ProtocolGuid + ) +{ + EFI_STATUS Status; + EFI_OPEN_PROTOCOL_INFORMATION_ENTRY *OpenInfoBuffer; + UINTN EntryCount; + UINTN Index; + + ASSERT (ProtocolGuid != NULL); + + // + // Retrieve the list of agents that are consuming the specific protocol + // on ControllerHandle. + // + Status = gBS->OpenProtocolInformation ( + ControllerHandle, + (EFI_GUID *) ProtocolGuid, + &OpenInfoBuffer, + &EntryCount + ); + if (EFI_ERROR (Status)) { + return EFI_UNSUPPORTED; + } + + // + // Inspect if ChildHandle is one of the agents. + // + Status = EFI_UNSUPPORTED; + for (Index = 0; Index < EntryCount; Index++) { + if ((OpenInfoBuffer[Index].ControllerHandle == ChildHandle) && + (OpenInfoBuffer[Index].Attributes & EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER) != 0) { + Status = EFI_SUCCESS; + break; + } + } + + FreePool (OpenInfoBuffer); + return Status; +} + +/** + Tests whether a language code has format of ISO639-2. + + @param Languages The language code to be tested. + + @retval TRUE Language code format is ISO 639-2. + @retval FALSE Language code format is not ISO639-2. + +**/ +STATIC +BOOLEAN +IsIso639LanguageCode ( + IN CONST CHAR8 *Languages + ) +{ + UINTN Index; + + // + // Find out format of Languages + // + for (Index = 0; Languages[Index] != 0 && Languages[Index] != ';' && Languages[Index] != '-'; Index++); + if (Languages[Index] != 0) { + // + // RFC4646 language code + // + return FALSE; + } + + // + // No ';' and '-', it's either ISO639-2 code (list) or single RFC4646 code + // + if (Index == 2) { + // + // Single RFC4646 language code without country code, e.g. "en" + // + return FALSE; + } + + // + // Languages in format of ISO639-2 + // + return TRUE; +} + +/** + Compare the first language instance of two language codes, either could be a + single language code or a language code list. This function assume Language1 + and Language2 has the same language code format, i.e. either ISO639-2 or RFC4646. + + @param Language1 The first language code to be tested. + @param Language2 The second language code to be tested. + + @retval TRUE Language code match. + @retval FALSE Language code mismatch. + +**/ +STATIC +BOOLEAN +CompareLanguageCode ( + IN CONST CHAR8 *Language1, + IN CONST CHAR8 *Language2 + ) +{ + UINTN Index; + + // + // Compare first two bytes of language tag + // + if ((Language1[0] != Language2[0]) || (Language1[1] != Language2[1])) { + return FALSE; + } + + if (IsIso639LanguageCode (Language1)) { + // + // ISO639-2 language code, compare the third byte of language tag + // + return (Language1[2] == Language2[2]) ? TRUE : FALSE; + } + + // + // RFC4646 language code + // + for (Index = 0; Language1[Index] != 0 && Language1[Index] != ';'; Index++); + if ((AsciiStrnCmp (Language1, Language2, Index) == 0) && (Language2[Index] == 0 || Language2[Index] == ';')) { + return TRUE; + } + + return FALSE; +} + +/** + Step to next language code of a language code list. + + @param Languages The language code list to traverse. + + @return Pointer to next language code or NULL terminator if it's the last one. + +**/ +STATIC +CONST +CHAR8 * +NextSupportedLanguage ( + IN CONST CHAR8 *Languages + ) +{ + UINTN Index; + + if (IsIso639LanguageCode (Languages)) { + // + // ISO639-2 language code + // + return (Languages + 3); + } + + // + // Search in RFC4646 language code list + // + for (Index = 0; Languages[Index] != 0 && Languages[Index] != ';'; Index++); + if (Languages[Index] == ';') { + Index++; + } + return (Languages + Index); +} + +/** + This function looks up a Unicode string in UnicodeStringTable. If Language is + a member of SupportedLanguages and a Unicode string is found in UnicodeStringTable + that matches the language code specified by Language, then it is returned in + UnicodeString. + + @param Language A pointer to the ISO 639-2 language code for the + Unicode string to look up and return. + @param SupportedLanguages A pointer to the set of ISO 639-2 language codes + that the Unicode string table supports. Language + must be a member of this set. + @param UnicodeStringTable A pointer to the table of Unicode strings. + @param UnicodeString A pointer to the Unicode string from UnicodeStringTable + that matches the language specified by Language. + + @retval EFI_SUCCESS The Unicode string that matches the language + specified by Language was found + in the table of Unicoide strings UnicodeStringTable, + and it was returned in UnicodeString. + @retval EFI_INVALID_PARAMETER Language is NULL. + @retval EFI_INVALID_PARAMETER UnicodeString is NULL. + @retval EFI_UNSUPPORTED SupportedLanguages is NULL. + @retval EFI_UNSUPPORTED UnicodeStringTable is NULL. + @retval EFI_UNSUPPORTED The language specified by Language is not a + member of SupportedLanguages. + @retval EFI_UNSUPPORTED The language specified by Language is not + supported by UnicodeStringTable. + +**/ +EFI_STATUS +EFIAPI +LookupUnicodeString ( + IN CONST CHAR8 *Language, + IN CONST CHAR8 *SupportedLanguages, + IN CONST EFI_UNICODE_STRING_TABLE *UnicodeStringTable, + OUT CHAR16 **UnicodeString + ) +{ + // + // Make sure the parameters are valid + // + if (Language == NULL || UnicodeString == NULL) { + return EFI_INVALID_PARAMETER; + } + + // + // If there are no supported languages, or the Unicode String Table is empty, then the + // Unicode String specified by Language is not supported by this Unicode String Table + // + if (SupportedLanguages == NULL || UnicodeStringTable == NULL) { + return EFI_UNSUPPORTED; + } + + // + // Make sure Language is in the set of Supported Languages + // + while (*SupportedLanguages != 0) { + if (CompareLanguageCode (Language, SupportedLanguages)) { + + // + // Search the Unicode String Table for the matching Language specifier + // + while (UnicodeStringTable->Language != NULL) { + if (CompareLanguageCode (Language, UnicodeStringTable->Language)) { + + // + // A matching string was found, so return it + // + *UnicodeString = UnicodeStringTable->UnicodeString; + return EFI_SUCCESS; + } + + UnicodeStringTable++; + } + + return EFI_UNSUPPORTED; + } + + SupportedLanguages = NextSupportedLanguage (SupportedLanguages); + } + + return EFI_UNSUPPORTED; +} + +/** + This function adds a Unicode string to UnicodeStringTable. + If Language is a member of SupportedLanguages then UnicodeString is added to + UnicodeStringTable. New buffers are allocated for both Language and + UnicodeString. The contents of Language and UnicodeString are copied into + these new buffers. These buffers are automatically freed when + FreeUnicodeStringTable() is called. + + @param Language A pointer to the ISO 639-2 language code for the Unicode + string to add. + @param SupportedLanguages A pointer to the set of ISO 639-2 language codes + that the Unicode string table supports. + Language must be a member of this set. + @param UnicodeStringTable A pointer to the table of Unicode strings. + @param UnicodeString A pointer to the Unicode string to add. + + @retval EFI_SUCCESS The Unicode string that matches the language + specified by Language was found in the table of + Unicode strings UnicodeStringTable, and it was + returned in UnicodeString. + @retval EFI_INVALID_PARAMETER Language is NULL. + @retval EFI_INVALID_PARAMETER UnicodeString is NULL. + @retval EFI_INVALID_PARAMETER UnicodeString is an empty string. + @retval EFI_UNSUPPORTED SupportedLanguages is NULL. + @retval EFI_ALREADY_STARTED A Unicode string with language Language is + already present in UnicodeStringTable. + @retval EFI_OUT_OF_RESOURCES There is not enough memory to add another + Unicode string to UnicodeStringTable. + @retval EFI_UNSUPPORTED The language specified by Language is not a + member of SupportedLanguages. + +**/ +EFI_STATUS +EFIAPI +AddUnicodeString ( + IN CONST CHAR8 *Language, + IN CONST CHAR8 *SupportedLanguages, + IN EFI_UNICODE_STRING_TABLE **UnicodeStringTable, + IN CONST CHAR16 *UnicodeString + ) +{ + UINTN NumberOfEntries; + EFI_UNICODE_STRING_TABLE *OldUnicodeStringTable; + EFI_UNICODE_STRING_TABLE *NewUnicodeStringTable; + UINTN UnicodeStringLength; + + // + // Make sure the parameter are valid + // + if (Language == NULL || UnicodeString == NULL || UnicodeStringTable == NULL) { + return EFI_INVALID_PARAMETER; + } + + // + // If there are no supported languages, then a Unicode String can not be added + // + if (SupportedLanguages == NULL) { + return EFI_UNSUPPORTED; + } + + // + // If the Unicode String is empty, then a Unicode String can not be added + // + if (UnicodeString[0] == 0) { + return EFI_INVALID_PARAMETER; + } + + // + // Make sure Language is a member of SupportedLanguages + // + while (*SupportedLanguages != 0) { + if (CompareLanguageCode (Language, SupportedLanguages)) { + + // + // Determine the size of the Unicode String Table by looking for a NULL Language entry + // + NumberOfEntries = 0; + if (*UnicodeStringTable != NULL) { + OldUnicodeStringTable = *UnicodeStringTable; + while (OldUnicodeStringTable->Language != NULL) { + if (CompareLanguageCode (Language, OldUnicodeStringTable->Language)) { + return EFI_ALREADY_STARTED; + } + + OldUnicodeStringTable++; + NumberOfEntries++; + } + } + + // + // Allocate space for a new Unicode String Table. It must hold the current number of + // entries, plus 1 entry for the new Unicode String, plus 1 entry for the end of table + // marker + // + NewUnicodeStringTable = AllocatePool ((NumberOfEntries + 2) * sizeof (EFI_UNICODE_STRING_TABLE)); + if (NewUnicodeStringTable == NULL) { + return EFI_OUT_OF_RESOURCES; + } + + // + // If the current Unicode String Table contains any entries, then copy them to the + // newly allocated Unicode String Table. + // + if (*UnicodeStringTable != NULL) { + CopyMem ( + NewUnicodeStringTable, + *UnicodeStringTable, + NumberOfEntries * sizeof (EFI_UNICODE_STRING_TABLE) + ); + } + + // + // Allocate space for a copy of the Language specifier + // + NewUnicodeStringTable[NumberOfEntries].Language = AllocateCopyPool (AsciiStrSize (Language), Language); + if (NewUnicodeStringTable[NumberOfEntries].Language == NULL) { + (gBS->FreePool) (NewUnicodeStringTable); + return EFI_OUT_OF_RESOURCES; + } + + // + // Compute the length of the Unicode String + // + for (UnicodeStringLength = 0; UnicodeString[UnicodeStringLength] != 0; UnicodeStringLength++) + ; + + // + // Allocate space for a copy of the Unicode String + // + NewUnicodeStringTable[NumberOfEntries].UnicodeString = AllocateCopyPool ( + (UnicodeStringLength + 1) * sizeof (CHAR16), + UnicodeString + ); + if (NewUnicodeStringTable[NumberOfEntries].UnicodeString == NULL) { + (gBS->FreePool) (NewUnicodeStringTable[NumberOfEntries].Language); + (gBS->FreePool) (NewUnicodeStringTable); + return EFI_OUT_OF_RESOURCES; + } + + // + // Mark the end of the Unicode String Table + // + NewUnicodeStringTable[NumberOfEntries + 1].Language = NULL; + NewUnicodeStringTable[NumberOfEntries + 1].UnicodeString = NULL; + + // + // Free the old Unicode String Table + // + if (*UnicodeStringTable != NULL) { + (gBS->FreePool) (*UnicodeStringTable); + } + + // + // Point UnicodeStringTable at the newly allocated Unicode String Table + // + *UnicodeStringTable = NewUnicodeStringTable; + + return EFI_SUCCESS; + } + + SupportedLanguages = NextSupportedLanguage (SupportedLanguages); + } + + return EFI_UNSUPPORTED; +} + +/** + This function frees the table of Unicode strings in UnicodeStringTable. + If UnicodeStringTable is NULL, then EFI_SUCCESS is returned. + Otherwise, each language code, and each Unicode string in the Unicode string + table are freed, and EFI_SUCCESS is returned. + + @param UnicodeStringTable A pointer to the table of Unicode strings. + + @retval EFI_SUCCESS The Unicode string table was freed. + +**/ +EFI_STATUS +EFIAPI +FreeUnicodeStringTable ( + IN EFI_UNICODE_STRING_TABLE *UnicodeStringTable + ) +{ + UINTN Index; + + // + // If the Unicode String Table is NULL, then it is already freed + // + if (UnicodeStringTable == NULL) { + return EFI_SUCCESS; + } + + // + // Loop through the Unicode String Table until we reach the end of table marker + // + for (Index = 0; UnicodeStringTable[Index].Language != NULL; Index++) { + + // + // Free the Language string from the Unicode String Table + // + (gBS->FreePool) (UnicodeStringTable[Index].Language); + + // + // Free the Unicode String from the Unicode String Table + // + if (UnicodeStringTable[Index].UnicodeString != NULL) { + (gBS->FreePool) (UnicodeStringTable[Index].UnicodeString); + } + } + + // + // Free the Unicode String Table itself + // + (gBS->FreePool) (UnicodeStringTable); + + return EFI_SUCCESS; +} + +/** + This function retrievesGUID name from Image Handle + + @param EFI_HANDLE Image Handle. + + @retval EFI_GUID* pointer to EFI_GUID. + +**/ +EFI_GUID * +GetGuidFromHandle ( + EFI_HANDLE Handle + ) +{ + EFI_STATUS Status; + EFI_LOADED_IMAGE_PROTOCOL *pImage; + MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *FvFilePath; + + if (Handle != NULL) { + Status = gBS->HandleProtocol ( + Handle, + &gEfiLoadedImageProtocolGuid, + &pImage + ); + if (!EFI_ERROR (Status)) { + if (pImage->FilePath->Type == MEDIA_DEVICE_PATH && pImage->FilePath->SubType == MEDIA_FV_FILEPATH_DP) { + // + // Determine GUID + // + FvFilePath = (MEDIA_FW_VOL_FILEPATH_DEVICE_PATH *) pImage->FilePath; + + return &FvFilePath->NameGuid; + } + } + } + + return NULL; +} |