[mirror_edk2.git] / MdeModulePkg / Universal / Variable / EmuRuntimeDxe / Variable.h

/** @file\r
\r
  The internal header file includes the common header files, defines\r
  internal structure and functions used by EmuVariable module.\r
\r
Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
This program and the accompanying materials\r
are licensed and made available under the terms and conditions of the BSD License\r
which accompanies this distribution.  The full text of the license may be found at\r
http://opensource.org/licenses/bsd-license.php\r
\r
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
\r
**/\r
\r
#ifndef _VARIABLE_H_\r
#define _VARIABLE_H_\r
\r
#include <Uefi.h>\r
\r
#include <Protocol/VariableWrite.h>\r
#include <Protocol/Variable.h>\r
\r
#include <Library/BaseMemoryLib.h>\r
#include <Library/MemoryAllocationLib.h>\r
#include <Library/DebugLib.h>\r
#include <Library/UefiRuntimeLib.h>\r
#include <Library/UefiDriverEntryPoint.h>\r
#include <Library/UefiBootServicesTableLib.h>\r
#include <Library/UefiLib.h>\r
#include <Library/BaseLib.h>\r
#include <Library/PcdLib.h>\r
#include <Library/HobLib.h>\r
#include <Guid/VariableFormat.h>\r
#include <Guid/GlobalVariable.h>\r
\r
#include <Guid/EventGroup.h>\r
\r
#define GET_VARIABLE_NAME_PTR(a)  (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))\r
\r
///\r
/// The size of a 3 character ISO639 language code.\r
///\r
#define ISO_639_2_ENTRY_SIZE    3\r
\r
typedef enum {\r
  Physical,\r
  Virtual\r
} VARIABLE_POINTER_TYPE;\r
\r
typedef struct {\r
  VARIABLE_HEADER *CurrPtr;\r
  VARIABLE_HEADER *EndPtr;\r
  VARIABLE_HEADER *StartPtr;\r
  BOOLEAN         Volatile;\r
} VARIABLE_POINTER_TRACK;\r
\r
typedef struct {\r
  EFI_PHYSICAL_ADDRESS  VolatileVariableBase;\r
  EFI_PHYSICAL_ADDRESS  NonVolatileVariableBase;\r
  EFI_LOCK              VariableServicesLock;\r
} VARIABLE_GLOBAL;\r
\r
typedef struct {\r
  VARIABLE_GLOBAL VariableGlobal[2];\r
  UINTN           VolatileLastVariableOffset;\r
  UINTN           NonVolatileLastVariableOffset;\r
  UINTN           CommonVariableTotalSize;\r
  UINTN           HwErrVariableTotalSize;\r
  CHAR8           *PlatformLangCodes;\r
  CHAR8           *LangCodes;\r
  CHAR8           *PlatformLang;\r
  CHAR8           Lang[ISO_639_2_ENTRY_SIZE + 1];\r
} ESAL_VARIABLE_GLOBAL;\r
\r
///\r
/// Don't use module globals after the SetVirtualAddress map is signaled\r
///\r
extern ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;\r
\r
/**\r
  Initializes variable store area for non-volatile and volatile variable.\r
\r
  This function allocates and initializes memory space for global context of ESAL\r
  variable service and variable store area for non-volatile and volatile variable.\r
\r
  @param  ImageHandle           The Image handle of this driver.\r
  @param  SystemTable           The pointer of EFI_SYSTEM_TABLE.\r
\r
  @retval EFI_SUCCESS           Function successfully executed.\r
  @retval EFI_OUT_OF_RESOURCES  Fail to allocate enough memory resource.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableCommonInitialize (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  );\r
\r
/**\r
  Entry point of EmuVariable service module.\r
\r
  This function is the entry point of EmuVariable service module.\r
  It registers all interfaces of Variable Services, initializes\r
  variable store for non-volatile and volatile variables, and registers\r
  notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
\r
  @param  ImageHandle   The Image handle of this driver.\r
  @param  SystemTable   The pointer of EFI_SYSTEM_TABLE.\r
\r
  @retval EFI_SUCCESS   Variable service successfully initialized.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
VariableServiceInitialize (\r
  IN EFI_HANDLE         ImageHandle,\r
  IN EFI_SYSTEM_TABLE   *SystemTable\r
  );\r
\r
/**\r
  Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r
\r
  This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
  It convers pointer to new virtual address.\r
\r
  @param  Event        Event whose notification function is being invoked.\r
  @param  Context      Pointer to the notification function's context.\r
\r
**/\r
VOID\r
EFIAPI\r
VariableClassAddressChangeEvent (\r
  IN EFI_EVENT        Event,\r
  IN VOID             *Context\r
  );\r
\r
/**\r
  This code finds variable in storage blocks (Volatile or Non-Volatile).\r
\r
  @param  VariableName           A Null-terminated Unicode string that is the name of\r
                                 the vendor's variable.\r
  @param  VendorGuid             A unique identifier for the vendor.\r
  @param  Attributes             If not NULL, a pointer to the memory location to return the\r
                                 attributes bitmask for the variable.\r
  @param  DataSize               Size of Data found. If size is less than the\r
                                 data, this value contains the required size.\r
  @param  Data                   On input, the size in bytes of the return Data buffer.\r
                                 On output, the size of data returned in Data.\r
  @param  Global                 Pointer to VARIABLE_GLOBAL structure\r
\r
  @retval EFI_SUCCESS            The function completed successfully.\r
  @retval EFI_NOT_FOUND          The variable was not found.\r
  @retval EFI_BUFFER_TOO_SMALL   DataSize is too small for the result.  DataSize has\r
                                 been updated with the size needed to complete the request.\r
  @retval EFI_INVALID_PARAMETER  VariableName or VendorGuid or DataSize is NULL.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuGetVariable (\r
  IN      CHAR16            *VariableName,\r
  IN      EFI_GUID          *VendorGuid,\r
  OUT     UINT32            *Attributes OPTIONAL,\r
  IN OUT  UINTN             *DataSize,\r
  OUT     VOID              *Data,\r
  IN      VARIABLE_GLOBAL   *Global\r
  );\r
\r
/**\r
\r
  This code finds the next available variable.\r
\r
  @param  VariableNameSize       The size of the VariableName buffer. The size must be large enough to fit input\r
                                 string supplied in VariableName buffer.\r
  @param  VariableName           On input, supplies the last VariableName that was returned by GetNextVariableName().\r
                                 On output, returns the Null-terminated Unicode string of the current variable.\r
  @param  VendorGuid             On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r
                                 On output, returns the VendorGuid of the current variable.\r
  @param  Global                 Pointer to VARIABLE_GLOBAL structure.\r
\r
  @retval EFI_SUCCESS            The function completed successfully.\r
  @retval EFI_NOT_FOUND          The next variable was not found.\r
  @retval EFI_BUFFER_TOO_SMALL   The VariableNameSize is too small for the result.\r
                                 VariableNameSize has been updated with the size needed to complete the request.\r
  @retval EFI_INVALID_PARAMETER  VariableNameSize or VariableName or VendorGuid is NULL.\r
  @retval EFI_INVALID_PARAMETER  The input values of VariableName and VendorGuid are not a name and\r
                                 GUID of an existing variable.\r
  @retval EFI_INVALID_PARAMETER  Null-terminator is not found in the first VariableNameSize bytes of\r
                                 the input VariableName buffer.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuGetNextVariableName (\r
  IN OUT  UINTN             *VariableNameSize,\r
  IN OUT  CHAR16            *VariableName,\r
  IN OUT  EFI_GUID          *VendorGuid,\r
  IN      VARIABLE_GLOBAL   *Global\r
  );\r
\r
/**\r
\r
  This code sets variable in storage blocks (Volatile or Non-Volatile).\r
\r
  @param  VariableName           A Null-terminated Unicode string that is the name of the vendor's\r
                                 variable.  Each VariableName is unique for each\r
                                 VendorGuid.  VariableName must contain 1 or more\r
                                 Unicode characters.  If VariableName is an empty Unicode\r
                                 string, then EFI_INVALID_PARAMETER is returned.\r
  @param  VendorGuid             A unique identifier for the vendor\r
  @param  Attributes             Attributes bitmask to set for the variable\r
  @param  DataSize               The size in bytes of the Data buffer.  A size of zero causes the\r
                                 variable to be deleted.\r
  @param  Data                   The contents for the variable\r
  @param  Global                 Pointer to VARIABLE_GLOBAL structure\r
  @param  VolatileOffset         The offset of last volatile variable\r
  @param  NonVolatileOffset      The offset of last non-volatile variable\r
\r
  @retval EFI_SUCCESS            The firmware has successfully stored the variable and its data as\r
                                 defined by the Attributes.\r
  @retval EFI_INVALID_PARAMETER  An invalid combination of attribute bits was supplied, or the\r
                                 DataSize exceeds the maximum allowed, or VariableName is an empty\r
                                 Unicode string, or VendorGuid is NULL.\r
  @retval EFI_OUT_OF_RESOURCES   Not enough storage is available to hold the variable and its data.\r
  @retval EFI_DEVICE_ERROR       The variable could not be saved due to a hardware failure.\r
  @retval EFI_WRITE_PROTECTED    The variable in question is read-only or cannot be deleted.\r
  @retval EFI_NOT_FOUND          The variable trying to be updated or deleted was not found.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuSetVariable (\r
  IN CHAR16                  *VariableName,\r
  IN EFI_GUID                *VendorGuid,\r
  IN UINT32                  Attributes,\r
  IN UINTN                   DataSize,\r
  IN VOID                    *Data,\r
  IN VARIABLE_GLOBAL         *Global,\r
  IN UINTN                   *VolatileOffset,\r
  IN UINTN                   *NonVolatileOffset\r
  );\r
\r
/**\r
\r
  This code returns information about the EFI variables.\r
\r
  @param  Attributes                   Attributes bitmask to specify the type of variables\r
                                       on which to return information.\r
  @param  MaximumVariableStorageSize   On output the maximum size of the storage space available for\r
                                       the EFI variables associated with the attributes specified.\r
  @param  RemainingVariableStorageSize Returns the remaining size of the storage space available for EFI\r
                                       variables associated with the attributes specified.\r
  @param  MaximumVariableSize          Returns the maximum size of an individual EFI variable\r
                                       associated with the attributes specified.\r
  @param  Global                       Pointer to VARIABLE_GLOBAL structure.\r
\r
  @retval EFI_SUCCESS                  Valid answer returned.\r
  @retval EFI_INVALID_PARAMETER        An invalid combination of attribute bits was supplied\r
  @retval EFI_UNSUPPORTED              The attribute is not supported on this platform, and the\r
                                       MaximumVariableStorageSize, RemainingVariableStorageSize,\r
                                       MaximumVariableSize are undefined.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
EmuQueryVariableInfo (\r
  IN  UINT32                 Attributes,\r
  OUT UINT64                 *MaximumVariableStorageSize,\r
  OUT UINT64                 *RemainingVariableStorageSize,\r
  OUT UINT64                 *MaximumVariableSize,\r
  IN  VARIABLE_GLOBAL        *Global\r
  );\r
\r
#endif\r
Commit	Line	Data
	1	/** @file\r
	2	\r
	3	The internal header file includes the common header files, defines\r
	4	internal structure and functions used by EmuVariable module.\r
	5	\r
	6	Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r
	7	This program and the accompanying materials\r
	8	are licensed and made available under the terms and conditions of the BSD License\r
	9	which accompanies this distribution. The full text of the license may be found at\r
	10	http://opensource.org/licenses/bsd-license.php\r
	11	\r
	12	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	13	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	14	\r
	15	**/\r
	16	\r
	17	#ifndef _VARIABLE_H_\r
	18	#define _VARIABLE_H_\r
	19	\r
	20	#include <Uefi.h>\r
	21	\r
	22	#include <Protocol/VariableWrite.h>\r
	23	#include <Protocol/Variable.h>\r
	24	\r
	25	#include <Library/BaseMemoryLib.h>\r
	26	#include <Library/MemoryAllocationLib.h>\r
	27	#include <Library/DebugLib.h>\r
	28	#include <Library/UefiRuntimeLib.h>\r
	29	#include <Library/UefiDriverEntryPoint.h>\r
	30	#include <Library/UefiBootServicesTableLib.h>\r
	31	#include <Library/UefiLib.h>\r
	32	#include <Library/BaseLib.h>\r
	33	#include <Library/PcdLib.h>\r
	34	#include <Library/HobLib.h>\r
	35	#include <Guid/VariableFormat.h>\r
	36	#include <Guid/GlobalVariable.h>\r
	37	\r
	38	#include <Guid/EventGroup.h>\r
	39	\r
	40	#define GET_VARIABLE_NAME_PTR(a) (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))\r
	41	\r
	42	///\r
	43	/// The size of a 3 character ISO639 language code.\r
	44	///\r
	45	#define ISO_639_2_ENTRY_SIZE 3\r
	46	\r
	47	typedef enum {\r
	48	Physical,\r
	49	Virtual\r
	50	} VARIABLE_POINTER_TYPE;\r
	51	\r
	52	typedef struct {\r
	53	VARIABLE_HEADER *CurrPtr;\r
	54	VARIABLE_HEADER *EndPtr;\r
	55	VARIABLE_HEADER *StartPtr;\r
	56	BOOLEAN Volatile;\r
	57	} VARIABLE_POINTER_TRACK;\r
	58	\r
	59	typedef struct {\r
	60	EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r
	61	EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r
	62	EFI_LOCK VariableServicesLock;\r
	63	} VARIABLE_GLOBAL;\r
	64	\r
	65	typedef struct {\r
	66	VARIABLE_GLOBAL VariableGlobal[2];\r
	67	UINTN VolatileLastVariableOffset;\r
	68	UINTN NonVolatileLastVariableOffset;\r
	69	UINTN CommonVariableTotalSize;\r
	70	UINTN HwErrVariableTotalSize;\r
	71	CHAR8 *PlatformLangCodes;\r
	72	CHAR8 *LangCodes;\r
	73	CHAR8 *PlatformLang;\r
	74	CHAR8 Lang[ISO_639_2_ENTRY_SIZE + 1];\r
	75	} ESAL_VARIABLE_GLOBAL;\r
	76	\r
	77	///\r
	78	/// Don't use module globals after the SetVirtualAddress map is signaled\r
	79	///\r
	80	extern ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;\r
	81	\r
	82	/**\r
	83	Initializes variable store area for non-volatile and volatile variable.\r
	84	\r
	85	This function allocates and initializes memory space for global context of ESAL\r
	86	variable service and variable store area for non-volatile and volatile variable.\r
	87	\r
	88	@param ImageHandle The Image handle of this driver.\r
	89	@param SystemTable The pointer of EFI_SYSTEM_TABLE.\r
	90	\r
	91	@retval EFI_SUCCESS Function successfully executed.\r
	92	@retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r
	93	\r
	94	**/\r
	95	EFI_STATUS\r
	96	EFIAPI\r
	97	VariableCommonInitialize (\r
	98	IN EFI_HANDLE ImageHandle,\r
	99	IN EFI_SYSTEM_TABLE *SystemTable\r
	100	);\r
	101	\r
	102	/**\r
	103	Entry point of EmuVariable service module.\r
	104	\r
	105	This function is the entry point of EmuVariable service module.\r
	106	It registers all interfaces of Variable Services, initializes\r
	107	variable store for non-volatile and volatile variables, and registers\r
	108	notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	109	\r
	110	@param ImageHandle The Image handle of this driver.\r
	111	@param SystemTable The pointer of EFI_SYSTEM_TABLE.\r
	112	\r
	113	@retval EFI_SUCCESS Variable service successfully initialized.\r
	114	\r
	115	**/\r
	116	EFI_STATUS\r
	117	EFIAPI\r
	118	VariableServiceInitialize (\r
	119	IN EFI_HANDLE ImageHandle,\r
	120	IN EFI_SYSTEM_TABLE *SystemTable\r
	121	);\r
	122	\r
	123	/**\r
	124	Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r
	125	\r
	126	This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	127	It convers pointer to new virtual address.\r
	128	\r
	129	@param Event Event whose notification function is being invoked.\r
	130	@param Context Pointer to the notification function's context.\r
	131	\r
	132	**/\r
	133	VOID\r
	134	EFIAPI\r
	135	VariableClassAddressChangeEvent (\r
	136	IN EFI_EVENT Event,\r
	137	IN VOID *Context\r
	138	);\r
	139	\r
	140	/**\r
	141	This code finds variable in storage blocks (Volatile or Non-Volatile).\r
	142	\r
	143	@param VariableName A Null-terminated Unicode string that is the name of\r
	144	the vendor's variable.\r
	145	@param VendorGuid A unique identifier for the vendor.\r
	146	@param Attributes If not NULL, a pointer to the memory location to return the\r
	147	attributes bitmask for the variable.\r
	148	@param DataSize Size of Data found. If size is less than the\r
	149	data, this value contains the required size.\r
	150	@param Data On input, the size in bytes of the return Data buffer.\r
	151	On output, the size of data returned in Data.\r
	152	@param Global Pointer to VARIABLE_GLOBAL structure\r
	153	\r
	154	@retval EFI_SUCCESS The function completed successfully.\r
	155	@retval EFI_NOT_FOUND The variable was not found.\r
	156	@retval EFI_BUFFER_TOO_SMALL DataSize is too small for the result. DataSize has\r
	157	been updated with the size needed to complete the request.\r
	158	@retval EFI_INVALID_PARAMETER VariableName or VendorGuid or DataSize is NULL.\r
	159	\r
	160	**/\r
	161	EFI_STATUS\r
	162	EFIAPI\r
	163	EmuGetVariable (\r
	164	IN CHAR16 *VariableName,\r
	165	IN EFI_GUID *VendorGuid,\r
	166	OUT UINT32 *Attributes OPTIONAL,\r
	167	IN OUT UINTN *DataSize,\r
	168	OUT VOID *Data,\r
	169	IN VARIABLE_GLOBAL *Global\r
	170	);\r
	171	\r
	172	/**\r
	173	\r
	174	This code finds the next available variable.\r
	175	\r
	176	@param VariableNameSize The size of the VariableName buffer. The size must be large enough to fit input\r
	177	string supplied in VariableName buffer.\r
	178	@param VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r
	179	On output, returns the Null-terminated Unicode string of the current variable.\r
	180	@param VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r
	181	On output, returns the VendorGuid of the current variable.\r
	182	@param Global Pointer to VARIABLE_GLOBAL structure.\r
	183	\r
	184	@retval EFI_SUCCESS The function completed successfully.\r
	185	@retval EFI_NOT_FOUND The next variable was not found.\r
	186	@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.\r
	187	VariableNameSize has been updated with the size needed to complete the request.\r
	188	@retval EFI_INVALID_PARAMETER VariableNameSize or VariableName or VendorGuid is NULL.\r
	189	@retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and\r
	190	GUID of an existing variable.\r
	191	@retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of\r
	192	the input VariableName buffer.\r
	193	\r
	194	**/\r
	195	EFI_STATUS\r
	196	EFIAPI\r
	197	EmuGetNextVariableName (\r
	198	IN OUT UINTN *VariableNameSize,\r
	199	IN OUT CHAR16 *VariableName,\r
	200	IN OUT EFI_GUID *VendorGuid,\r
	201	IN VARIABLE_GLOBAL *Global\r
	202	);\r
	203	\r
	204	/**\r
	205	\r
	206	This code sets variable in storage blocks (Volatile or Non-Volatile).\r
	207	\r
	208	@param VariableName A Null-terminated Unicode string that is the name of the vendor's\r
	209	variable. Each VariableName is unique for each\r
	210	VendorGuid. VariableName must contain 1 or more\r
	211	Unicode characters. If VariableName is an empty Unicode\r
	212	string, then EFI_INVALID_PARAMETER is returned.\r
	213	@param VendorGuid A unique identifier for the vendor\r
	214	@param Attributes Attributes bitmask to set for the variable\r
	215	@param DataSize The size in bytes of the Data buffer. A size of zero causes the\r
	216	variable to be deleted.\r
	217	@param Data The contents for the variable\r
	218	@param Global Pointer to VARIABLE_GLOBAL structure\r
	219	@param VolatileOffset The offset of last volatile variable\r
	220	@param NonVolatileOffset The offset of last non-volatile variable\r
	221	\r
	222	@retval EFI_SUCCESS The firmware has successfully stored the variable and its data as\r
	223	defined by the Attributes.\r
	224	@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied, or the\r
	225	DataSize exceeds the maximum allowed, or VariableName is an empty\r
	226	Unicode string, or VendorGuid is NULL.\r
	227	@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.\r
	228	@retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.\r
	229	@retval EFI_WRITE_PROTECTED The variable in question is read-only or cannot be deleted.\r
	230	@retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.\r
	231	\r
	232	**/\r
	233	EFI_STATUS\r
	234	EFIAPI\r
	235	EmuSetVariable (\r
	236	IN CHAR16 *VariableName,\r
	237	IN EFI_GUID *VendorGuid,\r
	238	IN UINT32 Attributes,\r
	239	IN UINTN DataSize,\r
	240	IN VOID *Data,\r
	241	IN VARIABLE_GLOBAL *Global,\r
	242	IN UINTN *VolatileOffset,\r
	243	IN UINTN *NonVolatileOffset\r
	244	);\r
	245	\r
	246	/**\r
	247	\r
	248	This code returns information about the EFI variables.\r
	249	\r
	250	@param Attributes Attributes bitmask to specify the type of variables\r
	251	on which to return information.\r
	252	@param MaximumVariableStorageSize On output the maximum size of the storage space available for\r
	253	the EFI variables associated with the attributes specified.\r
	254	@param RemainingVariableStorageSize Returns the remaining size of the storage space available for EFI\r
	255	variables associated with the attributes specified.\r
	256	@param MaximumVariableSize Returns the maximum size of an individual EFI variable\r
	257	associated with the attributes specified.\r
	258	@param Global Pointer to VARIABLE_GLOBAL structure.\r
	259	\r
	260	@retval EFI_SUCCESS Valid answer returned.\r
	261	@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied\r
	262	@retval EFI_UNSUPPORTED The attribute is not supported on this platform, and the\r
	263	MaximumVariableStorageSize, RemainingVariableStorageSize,\r
	264	MaximumVariableSize are undefined.\r
	265	\r
	266	**/\r
	267	EFI_STATUS\r
	268	EFIAPI\r
	269	EmuQueryVariableInfo (\r
	270	IN UINT32 Attributes,\r
	271	OUT UINT64 *MaximumVariableStorageSize,\r
	272	OUT UINT64 *RemainingVariableStorageSize,\r
	273	OUT UINT64 *MaximumVariableSize,\r
	274	IN VARIABLE_GLOBAL *Global\r
	275	);\r
	276	\r
	277	#endif\r