MdePkg/Include/Protocol/HiiDatabase.h - device/linaro/bootloader/edk2 - Git at Google

 /** @file
   The file provides Database manager for HII-related data
   structures.

 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 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.

 **/

 #ifndef __HII_DATABASE_H__
 #define __HII_DATABASE_H__

 #define EFI_HII_DATABASE_PROTOCOL_GUID \
   { 0xef9fc172, 0xa1b2, 0x4693, { 0xb3, 0x27, 0x6d, 0x32, 0xfc, 0x41, 0x60, 0x42 } }


 typedef struct _EFI_HII_DATABASE_PROTOCOL EFI_HII_DATABASE_PROTOCOL;


 ///
 /// EFI_HII_DATABASE_NOTIFY_TYPE.
 ///
 typedef UINTN   EFI_HII_DATABASE_NOTIFY_TYPE;

 #define EFI_HII_DATABASE_NOTIFY_NEW_PACK    0x00000001
 #define EFI_HII_DATABASE_NOTIFY_REMOVE_PACK 0x00000002
 #define EFI_HII_DATABASE_NOTIFY_EXPORT_PACK 0x00000004
 #define EFI_HII_DATABASE_NOTIFY_ADD_PACK    0x00000008
 /**

   Functions which are registered to receive notification of
   database events have this prototype. The actual event is encoded
   in NotifyType. The following table describes how PackageType,
   PackageGuid, Handle, and Package are used for each of the
   notification types.

   @param PackageType  Package type of the notification.

   @param PackageGuid  If PackageType is
                       EFI_HII_PACKAGE_TYPE_GUID, then this is
                       the pointer to the GUID from the Guid
                       field of EFI_HII_PACKAGE_GUID_HEADER.
                       Otherwise, it must be NULL.

   @param Package      Points to the package referred to by the notification.

   @param Handle       The handle of the package
                       list which contains the specified package.

   @param NotifyType   The type of change concerning the
                       database. See
                       EFI_HII_DATABASE_NOTIFY_TYPE.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_NOTIFY)(
   IN        UINT8                         PackageType,
   IN CONST  EFI_GUID                      *PackageGuid,
   IN CONST  EFI_HII_PACKAGE_HEADER        *Package,
   IN        EFI_HII_HANDLE                 Handle,
   IN        EFI_HII_DATABASE_NOTIFY_TYPE  NotifyType
 );

 /**

   This function adds the packages in the package list to the
   database and returns a handle. If there is a
   EFI_DEVICE_PATH_PROTOCOL associated with the DriverHandle, then
   this function will create a package of type
   EFI_PACKAGE_TYPE_DEVICE_PATH and add it to the package list. For
   each package in the package list, registered functions with the
   notification type NEW_PACK and having the same package type will
   be called. For each call to NewPackageList(), there should be a
   corresponding call to
   EFI_HII_DATABASE_PROTOCOL.RemovePackageList().

   @param This           A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param PackageList    A pointer to an EFI_HII_PACKAGE_LIST_HEADER structure.

   @param DriverHandle   Associate the package list with this EFI handle.
                         If a NULL is specified, this data will not be associate
                         with any drivers and cannot have a callback induced.

   @param Handle         A pointer to the EFI_HII_HANDLE instance.

   @retval EFI_SUCCESS           The package list associated with the
                                 Handle was added to the HII database.

   @retval EFI_OUT_OF_RESOURCES  Unable to allocate necessary
                                 resources for the new database
                                 contents.

   @retval EFI_INVALID_PARAMETER PackageList is NULL, or Handle is NULL.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_NEW_PACK)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL   *This,
   IN CONST  EFI_HII_PACKAGE_LIST_HEADER *PackageList,
   IN        EFI_HANDLE                  DriverHandle, OPTIONAL
   OUT       EFI_HII_HANDLE               *Handle
 );


 /**

   This function removes the package list that is associated with a
   handle Handle from the HII database. Before removing the
   package, any registered functions with the notification type
   REMOVE_PACK and the same package type will be called. For each
   call to EFI_HII_DATABASE_PROTOCOL.NewPackageList(), there should
   be a corresponding call to RemovePackageList.

   @param This             A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param Handle           The handle that was registered to the data
                           that is requested for removal.

   @retval EFI_SUCCESS     The data associated with the Handle was
                           removed from the HII database.
   @retval EFI_NOT_FOUND   The specified Handle is not in database.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_REMOVE_PACK)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN        EFI_HII_HANDLE             Handle
 );


 /**

   This function updates the existing package list (which has the
   specified Handle) in the HII databases, using the new package
   list specified by PackageList. The update process has the
   following steps: Collect all the package types in the package
   list specified by PackageList. A package type consists of the
   Type field of EFI_HII_PACKAGE_HEADER and, if the Type is
   EFI_HII_PACKAGE_TYPE_GUID, the Guid field, as defined in
   EFI_HII_PACKAGE_GUID_HEADER. Iterate through the packages within
   the existing package list in the HII database specified by
   Handle. If a package's type matches one of the collected types collected
   in step 1, then perform the following steps:
   - Call any functions registered with the notification type
   REMOVE_PACK.
   - Remove the package from the package list and the HII
   database.
   Add all of the packages within the new package list specified
   by PackageList, using the following steps:
   - Add the package to the package list and the HII database.
   - Call any functions registered with the notification type
   ADD_PACK.

   @param This         A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param Handle       The handle that was registered to the data
                       that is requested for removal.

   @param PackageList  A pointer to an EFI_HII_PACKAGE_LIST
                       package.

   @retval EFI_SUCCESS            The HII database was successfully updated.

   @retval EFI_OUT_OF_RESOURCES   Unable to allocate enough memory
                                  for the updated database.

   @retval EFI_INVALID_PARAMETER  PackageList was NULL.
   @retval EFI_NOT_FOUND          The specified Handle is not in database.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_UPDATE_PACK)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL   *This,
   IN        EFI_HII_HANDLE               Handle,
   IN CONST  EFI_HII_PACKAGE_LIST_HEADER *PackageList
 );


 /**

   This function returns a list of the package handles of the
   specified type that are currently active in the database. The
   pseudo-type EFI_HII_PACKAGE_TYPE_ALL will cause all package
   handles to be listed.

   @param This                 A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param PackageType          Specifies the package type of the packages
                               to list or EFI_HII_PACKAGE_TYPE_ALL for
                               all packages to be listed.

   @param PackageGuid          If PackageType is
                               EFI_HII_PACKAGE_TYPE_GUID, then this is
                               the pointer to the GUID which must match
                               the Guid field of
                               EFI_HII_PACKAGE_GUID_HEADER. Otherwise, it
                               must be NULL.

   @param HandleBufferLength   On input, a pointer to the length
                               of the handle buffer. On output,
                               the length of the handle buffer
                               that is required for the handles found.

   @param Handle               An array of EFI_HII_HANDLE instances returned.

   @retval EFI_SUCCESS           The matching handles are outputed successfully.
                                 HandleBufferLength is updated with the actual length.
   @retval EFI_BUFFER_TOO_SMALL  The HandleBufferLength parameter
                                 indicates that Handle is too
                                 small to support the number of
                                 handles. HandleBufferLength is
                                 updated with a value that will
                                 enable the data to fit.
   @retval EFI_NOT_FOUND         No matching handle could be found in database.
   @retval EFI_INVALID_PARAMETER HandleBufferLength was NULL.
   @retval EFI_INVALID_PARAMETER The value referenced by HandleBufferLength was not
                                 zero and Handle was NULL.
   @retval EFI_INVALID_PARAMETER PackageType is not a EFI_HII_PACKAGE_TYPE_GUID but
                                 PackageGuid is not NULL, PackageType is a EFI_HII_
                                 PACKAGE_TYPE_GUID but PackageGuid is NULL.
 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_LIST_PACKS)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN        UINT8                     PackageType,
   IN CONST  EFI_GUID                  *PackageGuid,
   IN OUT    UINTN                     *HandleBufferLength,
   OUT       EFI_HII_HANDLE            *Handle
 );

 /**

   This function will export one or all package lists in the
   database to a buffer. For each package list exported, this
   function will call functions registered with EXPORT_PACK and
   then copy the package list to the buffer. The registered
   functions may call EFI_HII_DATABASE_PROTOCOL.UpdatePackageList()
   to modify the package list before it is copied to the buffer. If
   the specified BufferSize is too small, then the status
   EFI_OUT_OF_RESOURCES will be returned and the actual package
   size will be returned in BufferSize.

   @param This         A pointer to the EFI_HII_DATABASE_PROTOCOL instance.


   @param Handle       An EFI_HII_HANDLE  that corresponds to the
                       desired package list in the HII database to
                       export or NULL to indicate all package lists
                       should be exported.

   @param BufferSize   On input, a pointer to the length of the
                       buffer. On output, the length of the
                       buffer that is required for the exported
                       data.

   @param Buffer       A pointer to a buffer that will contain the
                       results of the export function.


   @retval EFI_SUCCESS           Package exported.

   @retval EFI_OUT_OF_RESOURCES  BufferSize is too small to hold the package.

   @retval EFI_NOT_FOUND         The specifiecd Handle could not be found in the
                                 current database.

   @retval EFI_INVALID_PARAMETER BufferSize was NULL.

   @retval EFI_INVALID_PARAMETER The value referenced by BufferSize was not zero
                                 and Buffer was NULL.
 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_EXPORT_PACKS)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL      *This,
   IN        EFI_HII_HANDLE                 Handle,
   IN OUT    UINTN                          *BufferSize,
   OUT       EFI_HII_PACKAGE_LIST_HEADER    *Buffer
 );


 /**


   This function registers a function which will be called when
   specified actions related to packages of the specified type
   occur in the HII database. By registering a function, other
   HII-related drivers are notified when specific package types
   are added, removed or updated in the HII database. Each driver
   or application which registers a notification should use
   EFI_HII_DATABASE_PROTOCOL.UnregisterPackageNotify() before
   exiting.


   @param This             A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param PackageType      The package type. See
                           EFI_HII_PACKAGE_TYPE_x in EFI_HII_PACKAGE_HEADER.

   @param PackageGuid      If PackageType is
                           EFI_HII_PACKAGE_TYPE_GUID, then this is
                           the pointer to the GUID which must match
                           the Guid field of
                           EFI_HII_PACKAGE_GUID_HEADER. Otherwise, it
                           must be NULL.

   @param PackageNotifyFn  Points to the function to be called
                           when the event specified by
                           NotificationType occurs. See
                           EFI_HII_DATABASE_NOTIFY.

   @param NotifyType       Describes the types of notification which
                           this function will be receiving. See
                           EFI_HII_DATABASE_NOTIFY_TYPE for a
                           list of types.

   @param NotifyHandle     Points to the unique handle assigned to
                           the registered notification. Can be used
                           in EFI_HII_DATABASE_PROTOCOL.UnregisterPack
                           to stop notifications.


   @retval EFI_SUCCESS           Notification registered successfully.

   @retval EFI_OUT_OF_RESOURCES  Unable to allocate necessary
                                 data structures.

   @retval EFI_INVALID_PARAMETER PackageGuid is not NULL when
                                 PackageType is not
                                 EFI_HII_PACKAGE_TYPE_GUID.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_REGISTER_NOTIFY)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL     *This,
   IN        UINT8                         PackageType,
   IN CONST  EFI_GUID                      *PackageGuid,
   IN        EFI_HII_DATABASE_NOTIFY       PackageNotifyFn,
   IN        EFI_HII_DATABASE_NOTIFY_TYPE  NotifyType,
   OUT       EFI_HANDLE                    *NotifyHandle
 );


 /**

   Removes the specified HII database package-related notification.

   @param This                 A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

   @param NotificationHandle   The handle of the notification
                               function being unregistered.

   @retval EFI_SUCCESS   Successsfully unregistered the notification.

   @retval EFI_NOT_FOUND The incoming notification handle does not exist
                         in the current hii database.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_UNREGISTER_NOTIFY)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN        EFI_HANDLE                NotificationHandle
 );


 /**

   This routine retrieves an array of GUID values for each keyboard
   layout that was previously registered in the system.

   @param This                 A pointer to the EFI_HII_PROTOCOL instance.

   @param KeyGuidBufferLength  On input, a pointer to the length
                               of the keyboard GUID buffer. On
                               output, the length of the handle
                               buffer that is required for the
                               handles found.

   @param KeyGuidBuffer        An array of keyboard layout GUID
                               instances returned.

   @retval EFI_SUCCESS           KeyGuidBuffer was updated successfully.

   @retval EFI_BUFFER_TOO_SMALL  The KeyGuidBufferLength
                                 parameter indicates that
                                 KeyGuidBuffer is too small to
                                 support the number of GUIDs.
                                 KeyGuidBufferLength is updated
                                 with a value that will enable
                                 the data to fit.
   @retval EFI_INVALID_PARAMETER The KeyGuidBufferLength is NULL.
   @retval EFI_INVALID_PARAMETER The value referenced by
                                 KeyGuidBufferLength is not
                                 zero and KeyGuidBuffer is NULL.
   @retval EFI_NOT_FOUND         There was no keyboard layout.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_FIND_KEYBOARD_LAYOUTS)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN OUT    UINT16                    *KeyGuidBufferLength,
   OUT       EFI_GUID                  *KeyGuidBuffer
 );


 /**

   This routine retrieves the requested keyboard layout. The layout
   is a physical description of the keys on a keyboard, and the
   character(s) that are associated with a particular set of key
   strokes.

   @param This                   A pointer to the EFI_HII_PROTOCOL instance.

   @param KeyGuid                A pointer to the unique ID associated with a
                                 given keyboard layout. If KeyGuid is NULL then
                                 the current layout will be retrieved.

   @param KeyboardLayoutLength   On input, a pointer to the length of the
                                 KeyboardLayout buffer.  On output, the length of
                                 the data placed into KeyboardLayout.

   @param KeyboardLayout         A pointer to a buffer containing the
                                 retrieved keyboard layout.

   @retval EFI_SUCCESS   The keyboard layout was retrieved
                         successfully.

   @retval EFI_NOT_FOUND The requested keyboard layout was not found.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_GET_KEYBOARD_LAYOUT)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN CONST  EFI_GUID                  *KeyGuid,
   IN OUT UINT16                       *KeyboardLayoutLength,
   OUT       EFI_HII_KEYBOARD_LAYOUT   *KeyboardLayout
 );

 /**

   This routine sets the default keyboard layout to the one
   referenced by KeyGuid. When this routine is called, an event
   will be signaled of the EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID
   group type. This is so that agents which are sensitive to the
   current keyboard layout being changed can be notified of this
   change.

   @param This      A pointer to the EFI_HII_PROTOCOL instance.

   @param KeyGuid   A pointer to the unique ID associated with a
                    given keyboard layout.

   @retval EFI_SUCCESS    The current keyboard layout was successfully set.

   @retval EFI_NOT_FOUND  The referenced keyboard layout was not
                          found, so action was taken.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_SET_KEYBOARD_LAYOUT)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN CONST  EFI_GUID                  *KeyGuid
 );

 /**

   Return the EFI handle associated with a package list.

   @param This               A pointer to the EFI_HII_PROTOCOL instance.

   @param PackageListHandle  An EFI_HII_HANDLE  that corresponds
                             to the desired package list in the
                             HIIdatabase.

   @param DriverHandle       On return, contains the EFI_HANDLE which
                             was registered with the package list in
                             NewPackageList().

   @retval EFI_SUCCESS            The DriverHandle was returned successfully.

   @retval EFI_INVALID_PARAMETER  The PackageListHandle was not valid.

 **/
 typedef
 EFI_STATUS
 (EFIAPI *EFI_HII_DATABASE_GET_PACK_HANDLE)(
   IN CONST  EFI_HII_DATABASE_PROTOCOL *This,
   IN        EFI_HII_HANDLE             PackageListHandle,
   OUT       EFI_HANDLE                *DriverHandle
 );

 ///
 /// Database manager for HII-related data structures.
 ///
 struct _EFI_HII_DATABASE_PROTOCOL {
   EFI_HII_DATABASE_NEW_PACK           NewPackageList;
   EFI_HII_DATABASE_REMOVE_PACK        RemovePackageList;
   EFI_HII_DATABASE_UPDATE_PACK        UpdatePackageList;
   EFI_HII_DATABASE_LIST_PACKS         ListPackageLists;
   EFI_HII_DATABASE_EXPORT_PACKS       ExportPackageLists;
   EFI_HII_DATABASE_REGISTER_NOTIFY    RegisterPackageNotify;
   EFI_HII_DATABASE_UNREGISTER_NOTIFY  UnregisterPackageNotify;
   EFI_HII_FIND_KEYBOARD_LAYOUTS       FindKeyboardLayouts;
   EFI_HII_GET_KEYBOARD_LAYOUT         GetKeyboardLayout;
   EFI_HII_SET_KEYBOARD_LAYOUT         SetKeyboardLayout;
   EFI_HII_DATABASE_GET_PACK_HANDLE    GetPackageListHandle;
 };

 extern EFI_GUID gEfiHiiDatabaseProtocolGuid;

 #endif
	/** @file
	The file provides Database manager for HII-related data
	structures.

	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 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.

	**/

	#ifndef __HII_DATABASE_H__
	#define __HII_DATABASE_H__

	#define EFI_HII_DATABASE_PROTOCOL_GUID \
	{ 0xef9fc172, 0xa1b2, 0x4693, { 0xb3, 0x27, 0x6d, 0x32, 0xfc, 0x41, 0x60, 0x42 } }


	typedef struct _EFI_HII_DATABASE_PROTOCOL EFI_HII_DATABASE_PROTOCOL;


	///
	/// EFI_HII_DATABASE_NOTIFY_TYPE.
	///
	typedef UINTN EFI_HII_DATABASE_NOTIFY_TYPE;

	#define EFI_HII_DATABASE_NOTIFY_NEW_PACK 0x00000001
	#define EFI_HII_DATABASE_NOTIFY_REMOVE_PACK 0x00000002
	#define EFI_HII_DATABASE_NOTIFY_EXPORT_PACK 0x00000004
	#define EFI_HII_DATABASE_NOTIFY_ADD_PACK 0x00000008
	/**

	Functions which are registered to receive notification of
	database events have this prototype. The actual event is encoded
	in NotifyType. The following table describes how PackageType,
	PackageGuid, Handle, and Package are used for each of the
	notification types.

	@param PackageType Package type of the notification.

	@param PackageGuid If PackageType is
	EFI_HII_PACKAGE_TYPE_GUID, then this is
	the pointer to the GUID from the Guid
	field of EFI_HII_PACKAGE_GUID_HEADER.
	Otherwise, it must be NULL.

	@param Package Points to the package referred to by the notification.

	@param Handle The handle of the package
	list which contains the specified package.

	@param NotifyType The type of change concerning the
	database. See
	EFI_HII_DATABASE_NOTIFY_TYPE.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_NOTIFY)(
	IN UINT8 PackageType,
	IN CONST EFI_GUID *PackageGuid,
	IN CONST EFI_HII_PACKAGE_HEADER *Package,
	IN EFI_HII_HANDLE Handle,
	IN EFI_HII_DATABASE_NOTIFY_TYPE NotifyType
	);

	/**

	This function adds the packages in the package list to the
	database and returns a handle. If there is a
	EFI_DEVICE_PATH_PROTOCOL associated with the DriverHandle, then
	this function will create a package of type
	EFI_PACKAGE_TYPE_DEVICE_PATH and add it to the package list. For
	each package in the package list, registered functions with the
	notification type NEW_PACK and having the same package type will
	be called. For each call to NewPackageList(), there should be a
	corresponding call to
	EFI_HII_DATABASE_PROTOCOL.RemovePackageList().

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param PackageList A pointer to an EFI_HII_PACKAGE_LIST_HEADER structure.

	@param DriverHandle Associate the package list with this EFI handle.
	If a NULL is specified, this data will not be associate
	with any drivers and cannot have a callback induced.

	@param Handle A pointer to the EFI_HII_HANDLE instance.

	@retval EFI_SUCCESS The package list associated with the
	Handle was added to the HII database.

	@retval EFI_OUT_OF_RESOURCES Unable to allocate necessary
	resources for the new database
	contents.

	@retval EFI_INVALID_PARAMETER PackageList is NULL, or Handle is NULL.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_NEW_PACK)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN CONST EFI_HII_PACKAGE_LIST_HEADER *PackageList,
	IN EFI_HANDLE DriverHandle, OPTIONAL
	OUT EFI_HII_HANDLE *Handle
	);


	/**

	This function removes the package list that is associated with a
	handle Handle from the HII database. Before removing the
	package, any registered functions with the notification type
	REMOVE_PACK and the same package type will be called. For each
	call to EFI_HII_DATABASE_PROTOCOL.NewPackageList(), there should
	be a corresponding call to RemovePackageList.

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param Handle The handle that was registered to the data
	that is requested for removal.

	@retval EFI_SUCCESS The data associated with the Handle was
	removed from the HII database.
	@retval EFI_NOT_FOUND The specified Handle is not in database.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_REMOVE_PACK)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN EFI_HII_HANDLE Handle
	);


	/**

	This function updates the existing package list (which has the
	specified Handle) in the HII databases, using the new package
	list specified by PackageList. The update process has the
	following steps: Collect all the package types in the package
	list specified by PackageList. A package type consists of the
	Type field of EFI_HII_PACKAGE_HEADER and, if the Type is
	EFI_HII_PACKAGE_TYPE_GUID, the Guid field, as defined in
	EFI_HII_PACKAGE_GUID_HEADER. Iterate through the packages within
	the existing package list in the HII database specified by
	Handle. If a package's type matches one of the collected types collected
	in step 1, then perform the following steps:
	- Call any functions registered with the notification type
	REMOVE_PACK.
	- Remove the package from the package list and the HII
	database.
	Add all of the packages within the new package list specified
	by PackageList, using the following steps:
	- Add the package to the package list and the HII database.
	- Call any functions registered with the notification type
	ADD_PACK.

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param Handle The handle that was registered to the data
	that is requested for removal.

	@param PackageList A pointer to an EFI_HII_PACKAGE_LIST
	package.

	@retval EFI_SUCCESS The HII database was successfully updated.

	@retval EFI_OUT_OF_RESOURCES Unable to allocate enough memory
	for the updated database.

	@retval EFI_INVALID_PARAMETER PackageList was NULL.
	@retval EFI_NOT_FOUND The specified Handle is not in database.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_UPDATE_PACK)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN EFI_HII_HANDLE Handle,
	IN CONST EFI_HII_PACKAGE_LIST_HEADER *PackageList
	);


	/**

	This function returns a list of the package handles of the
	specified type that are currently active in the database. The
	pseudo-type EFI_HII_PACKAGE_TYPE_ALL will cause all package
	handles to be listed.

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param PackageType Specifies the package type of the packages
	to list or EFI_HII_PACKAGE_TYPE_ALL for
	all packages to be listed.

	@param PackageGuid If PackageType is
	EFI_HII_PACKAGE_TYPE_GUID, then this is
	the pointer to the GUID which must match
	the Guid field of
	EFI_HII_PACKAGE_GUID_HEADER. Otherwise, it
	must be NULL.

	@param HandleBufferLength On input, a pointer to the length
	of the handle buffer. On output,
	the length of the handle buffer
	that is required for the handles found.

	@param Handle An array of EFI_HII_HANDLE instances returned.

	@retval EFI_SUCCESS The matching handles are outputed successfully.
	HandleBufferLength is updated with the actual length.
	@retval EFI_BUFFER_TOO_SMALL The HandleBufferLength parameter
	indicates that Handle is too
	small to support the number of
	handles. HandleBufferLength is
	updated with a value that will
	enable the data to fit.
	@retval EFI_NOT_FOUND No matching handle could be found in database.
	@retval EFI_INVALID_PARAMETER HandleBufferLength was NULL.
	@retval EFI_INVALID_PARAMETER The value referenced by HandleBufferLength was not
	zero and Handle was NULL.
	@retval EFI_INVALID_PARAMETER PackageType is not a EFI_HII_PACKAGE_TYPE_GUID but
	PackageGuid is not NULL, PackageType is a EFI_HII_
	PACKAGE_TYPE_GUID but PackageGuid is NULL.
	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_LIST_PACKS)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN UINT8 PackageType,
	IN CONST EFI_GUID *PackageGuid,
	IN OUT UINTN *HandleBufferLength,
	OUT EFI_HII_HANDLE *Handle
	);

	/**

	This function will export one or all package lists in the
	database to a buffer. For each package list exported, this
	function will call functions registered with EXPORT_PACK and
	then copy the package list to the buffer. The registered
	functions may call EFI_HII_DATABASE_PROTOCOL.UpdatePackageList()
	to modify the package list before it is copied to the buffer. If
	the specified BufferSize is too small, then the status
	EFI_OUT_OF_RESOURCES will be returned and the actual package
	size will be returned in BufferSize.

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.


	@param Handle An EFI_HII_HANDLE that corresponds to the
	desired package list in the HII database to
	export or NULL to indicate all package lists
	should be exported.

	@param BufferSize On input, a pointer to the length of the
	buffer. On output, the length of the
	buffer that is required for the exported
	data.

	@param Buffer A pointer to a buffer that will contain the
	results of the export function.


	@retval EFI_SUCCESS Package exported.

	@retval EFI_OUT_OF_RESOURCES BufferSize is too small to hold the package.

	@retval EFI_NOT_FOUND The specifiecd Handle could not be found in the
	current database.

	@retval EFI_INVALID_PARAMETER BufferSize was NULL.

	@retval EFI_INVALID_PARAMETER The value referenced by BufferSize was not zero
	and Buffer was NULL.
	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_EXPORT_PACKS)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN EFI_HII_HANDLE Handle,
	IN OUT UINTN *BufferSize,
	OUT EFI_HII_PACKAGE_LIST_HEADER *Buffer
	);


	/**


	This function registers a function which will be called when
	specified actions related to packages of the specified type
	occur in the HII database. By registering a function, other
	HII-related drivers are notified when specific package types
	are added, removed or updated in the HII database. Each driver
	or application which registers a notification should use
	EFI_HII_DATABASE_PROTOCOL.UnregisterPackageNotify() before
	exiting.


	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param PackageType The package type. See
	EFI_HII_PACKAGE_TYPE_x in EFI_HII_PACKAGE_HEADER.

	@param PackageGuid If PackageType is
	EFI_HII_PACKAGE_TYPE_GUID, then this is
	the pointer to the GUID which must match
	the Guid field of
	EFI_HII_PACKAGE_GUID_HEADER. Otherwise, it
	must be NULL.

	@param PackageNotifyFn Points to the function to be called
	when the event specified by
	NotificationType occurs. See
	EFI_HII_DATABASE_NOTIFY.

	@param NotifyType Describes the types of notification which
	this function will be receiving. See
	EFI_HII_DATABASE_NOTIFY_TYPE for a
	list of types.

	@param NotifyHandle Points to the unique handle assigned to
	the registered notification. Can be used
	in EFI_HII_DATABASE_PROTOCOL.UnregisterPack
	to stop notifications.


	@retval EFI_SUCCESS Notification registered successfully.

	@retval EFI_OUT_OF_RESOURCES Unable to allocate necessary
	data structures.

	@retval EFI_INVALID_PARAMETER PackageGuid is not NULL when
	PackageType is not
	EFI_HII_PACKAGE_TYPE_GUID.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_REGISTER_NOTIFY)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN UINT8 PackageType,
	IN CONST EFI_GUID *PackageGuid,
	IN EFI_HII_DATABASE_NOTIFY PackageNotifyFn,
	IN EFI_HII_DATABASE_NOTIFY_TYPE NotifyType,
	OUT EFI_HANDLE *NotifyHandle
	);


	/**

	Removes the specified HII database package-related notification.

	@param This A pointer to the EFI_HII_DATABASE_PROTOCOL instance.

	@param NotificationHandle The handle of the notification
	function being unregistered.

	@retval EFI_SUCCESS Successsfully unregistered the notification.

	@retval EFI_NOT_FOUND The incoming notification handle does not exist
	in the current hii database.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_UNREGISTER_NOTIFY)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN EFI_HANDLE NotificationHandle
	);


	/**

	This routine retrieves an array of GUID values for each keyboard
	layout that was previously registered in the system.

	@param This A pointer to the EFI_HII_PROTOCOL instance.

	@param KeyGuidBufferLength On input, a pointer to the length
	of the keyboard GUID buffer. On
	output, the length of the handle
	buffer that is required for the
	handles found.

	@param KeyGuidBuffer An array of keyboard layout GUID
	instances returned.

	@retval EFI_SUCCESS KeyGuidBuffer was updated successfully.

	@retval EFI_BUFFER_TOO_SMALL The KeyGuidBufferLength
	parameter indicates that
	KeyGuidBuffer is too small to
	support the number of GUIDs.
	KeyGuidBufferLength is updated
	with a value that will enable
	the data to fit.
	@retval EFI_INVALID_PARAMETER The KeyGuidBufferLength is NULL.
	@retval EFI_INVALID_PARAMETER The value referenced by
	KeyGuidBufferLength is not
	zero and KeyGuidBuffer is NULL.
	@retval EFI_NOT_FOUND There was no keyboard layout.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_FIND_KEYBOARD_LAYOUTS)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN OUT UINT16 *KeyGuidBufferLength,
	OUT EFI_GUID *KeyGuidBuffer
	);


	/**

	This routine retrieves the requested keyboard layout. The layout
	is a physical description of the keys on a keyboard, and the
	character(s) that are associated with a particular set of key
	strokes.

	@param This A pointer to the EFI_HII_PROTOCOL instance.

	@param KeyGuid A pointer to the unique ID associated with a
	given keyboard layout. If KeyGuid is NULL then
	the current layout will be retrieved.

	@param KeyboardLayoutLength On input, a pointer to the length of the
	KeyboardLayout buffer. On output, the length of
	the data placed into KeyboardLayout.

	@param KeyboardLayout A pointer to a buffer containing the
	retrieved keyboard layout.

	@retval EFI_SUCCESS The keyboard layout was retrieved
	successfully.

	@retval EFI_NOT_FOUND The requested keyboard layout was not found.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_GET_KEYBOARD_LAYOUT)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN CONST EFI_GUID *KeyGuid,
	IN OUT UINT16 *KeyboardLayoutLength,
	OUT EFI_HII_KEYBOARD_LAYOUT *KeyboardLayout
	);

	/**

	This routine sets the default keyboard layout to the one
	referenced by KeyGuid. When this routine is called, an event
	will be signaled of the EFI_HII_SET_KEYBOARD_LAYOUT_EVENT_GUID
	group type. This is so that agents which are sensitive to the
	current keyboard layout being changed can be notified of this
	change.

	@param This A pointer to the EFI_HII_PROTOCOL instance.

	@param KeyGuid A pointer to the unique ID associated with a
	given keyboard layout.

	@retval EFI_SUCCESS The current keyboard layout was successfully set.

	@retval EFI_NOT_FOUND The referenced keyboard layout was not
	found, so action was taken.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_SET_KEYBOARD_LAYOUT)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN CONST EFI_GUID *KeyGuid
	);

	/**

	Return the EFI handle associated with a package list.

	@param This A pointer to the EFI_HII_PROTOCOL instance.

	@param PackageListHandle An EFI_HII_HANDLE that corresponds
	to the desired package list in the
	HIIdatabase.

	@param DriverHandle On return, contains the EFI_HANDLE which
	was registered with the package list in
	NewPackageList().

	@retval EFI_SUCCESS The DriverHandle was returned successfully.

	@retval EFI_INVALID_PARAMETER The PackageListHandle was not valid.

	**/
	typedef
	EFI_STATUS
	(EFIAPI *EFI_HII_DATABASE_GET_PACK_HANDLE)(
	IN CONST EFI_HII_DATABASE_PROTOCOL *This,
	IN EFI_HII_HANDLE PackageListHandle,
	OUT EFI_HANDLE *DriverHandle
	);

	///
	/// Database manager for HII-related data structures.
	///
	struct _EFI_HII_DATABASE_PROTOCOL {
	EFI_HII_DATABASE_NEW_PACK NewPackageList;
	EFI_HII_DATABASE_REMOVE_PACK RemovePackageList;
	EFI_HII_DATABASE_UPDATE_PACK UpdatePackageList;
	EFI_HII_DATABASE_LIST_PACKS ListPackageLists;
	EFI_HII_DATABASE_EXPORT_PACKS ExportPackageLists;
	EFI_HII_DATABASE_REGISTER_NOTIFY RegisterPackageNotify;
	EFI_HII_DATABASE_UNREGISTER_NOTIFY UnregisterPackageNotify;
	EFI_HII_FIND_KEYBOARD_LAYOUTS FindKeyboardLayouts;
	EFI_HII_GET_KEYBOARD_LAYOUT GetKeyboardLayout;
	EFI_HII_SET_KEYBOARD_LAYOUT SetKeyboardLayout;
	EFI_HII_DATABASE_GET_PACK_HANDLE GetPackageListHandle;
	};

	extern EFI_GUID gEfiHiiDatabaseProtocolGuid;

	#endif