[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 - 2008, Intel Corporation\r
All rights reserved. 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 <VariableFormat.h>\r
\r
#define VARIABLE_STORE_SIZE FixedPcdGet32(PcdVariableStoreSize)\r
#define SCRATCH_SIZE        FixedPcdGet32(PcdMaxVariableSize)\r
\r
//\r
// Define GET_PAD_SIZE to optimize compiler\r
//\r
#if ((ALIGNMENT == 0) || (ALIGNMENT == 1))\r
#define GET_PAD_SIZE(a) (0)\r
#else\r
#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))\r
#endif\r
\r
#define GET_VARIABLE_NAME_PTR(a)  (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))\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
  UINT32          FvbInstance;\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
  @param  Instance               Instance of the Firmware Volume.\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
GetVariable (\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
  IN      UINT32            Instance\r
  );\r
\r
/**\r
\r
  This code finds the next available variable.\r
\r
  @param  VariableNameSize       Size of the variable.\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
  @param  Instance               Instance of the Firmware Volume.\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   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
\r
**/\r
EFI_STATUS\r
EFIAPI\r
GetNextVariableName (\r
  IN OUT  UINTN             *VariableNameSize,\r
  IN OUT  CHAR16            *VariableName,\r
  IN OUT  EFI_GUID          *VendorGuid,\r
  IN      VARIABLE_GLOBAL   *Global,\r
  IN      UINT32            Instance\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
  @param  Instance               Instance of the Firmware Volume.\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
SetVariable (\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
  IN UINT32                  Instance\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
  @param  Instance                     Instance of the Firmware Volume.\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
QueryVariableInfo (\r
  IN  UINT32                 Attributes,\r
  OUT UINT64                 *MaximumVariableStorageSize,\r
  OUT UINT64                 *RemainingVariableStorageSize,\r
  OUT UINT64                 *MaximumVariableSize,\r
  IN  VARIABLE_GLOBAL        *Global,\r
  IN  UINT32                 Instance\r
  );\r
\r
#endif\r
Commit	Line	Data
504214c4	1	/** @file\r
8d3a5c82	2	\r
504214c4 LG	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 - 2008, Intel Corporation\r
8d3a5c82	7	All rights reserved. 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
504214c4	15	**/\r
8d3a5c82	16	\r
1794e506	17	#ifndef _VARIABLE_H_\r
1794e506	18	#define _VARIABLE_H_\r
ed7748fe	19	\r
60c93673	20	#include <Uefi.h>\r
ed7748fe	21	\r
8d3a5c82	22	#include <Protocol/VariableWrite.h>\r
8d3a5c82	23	#include <Protocol/Variable.h>\r
ed7748fe	24	\r
8d3a5c82	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
518d395c	33	#include <Library/PcdLib.h>\r
3cfb790c	34	#include <VariableFormat.h>\r
8d3a5c82	35	\r
518d395c	36	#define VARIABLE_STORE_SIZE FixedPcdGet32(PcdVariableStoreSize)\r
518d395c	37	#define SCRATCH_SIZE FixedPcdGet32(PcdMaxVariableSize)\r
8d3a5c82	38	\r
	39	//\r
	40	// Define GET_PAD_SIZE to optimize compiler\r
	41	//\r
	42	#if ((ALIGNMENT == 0) \|\| (ALIGNMENT == 1))\r
	43	#define GET_PAD_SIZE(a) (0)\r
	44	#else\r
	45	#define GET_PAD_SIZE(a) (((~a) + 1) & (ALIGNMENT - 1))\r
	46	#endif\r
	47	\r
	48	#define GET_VARIABLE_NAME_PTR(a) (CHAR16 *) ((UINTN) (a) + sizeof (VARIABLE_HEADER))\r
	49	\r
	50	typedef enum {\r
	51	Physical,\r
	52	Virtual\r
	53	} VARIABLE_POINTER_TYPE;\r
	54	\r
	55	typedef struct {\r
	56	VARIABLE_HEADER *CurrPtr;\r
	57	VARIABLE_HEADER *EndPtr;\r
	58	VARIABLE_HEADER *StartPtr;\r
	59	BOOLEAN Volatile;\r
	60	} VARIABLE_POINTER_TRACK;\r
	61	\r
	62	typedef struct {\r
	63	EFI_PHYSICAL_ADDRESS VolatileVariableBase;\r
	64	EFI_PHYSICAL_ADDRESS NonVolatileVariableBase;\r
	65	EFI_LOCK VariableServicesLock;\r
	66	} VARIABLE_GLOBAL;\r
	67	\r
	68	typedef struct {\r
	69	VARIABLE_GLOBAL VariableGlobal[2];\r
	70	UINTN VolatileLastVariableOffset;\r
	71	UINTN NonVolatileLastVariableOffset;\r
	72	UINT32 FvbInstance;\r
	73	} ESAL_VARIABLE_GLOBAL;\r
	74	\r
1794e506	75	///\r
	76	/// Don't use module globals after the SetVirtualAddress map is signaled\r
	77	///\r
8d3a5c82	78	extern ESAL_VARIABLE_GLOBAL *mVariableModuleGlobal;\r
8d3a5c82	79	\r
1794e506	80	/**\r
	81	Initializes variable store area for non-volatile and volatile variable.\r
	82	\r
	83	This function allocates and initializes memory space for global context of ESAL\r
	84	variable service and variable store area for non-volatile and volatile variable.\r
	85	\r
	86	@param ImageHandle The Image handle of this driver.\r
	87	@param SystemTable The pointer of EFI_SYSTEM_TABLE.\r
	88	\r
	89	@retval EFI_SUCCESS Function successfully executed.\r
	90	@retval EFI_OUT_OF_RESOURCES Fail to allocate enough memory resource.\r
	91	\r
	92	**/\r
8d3a5c82	93	EFI_STATUS\r
	94	EFIAPI\r
	95	VariableCommonInitialize (\r
	96	IN EFI_HANDLE ImageHandle,\r
	97	IN EFI_SYSTEM_TABLE *SystemTable\r
ed66e1bc	98	);\r
8d3a5c82	99	\r
1794e506	100	/**\r
	101	Entry point of EmuVariable service module.\r
	102	\r
	103	This function is the entry point of EmuVariable service module.\r
	104	It registers all interfaces of Variable Services, initializes\r
	105	variable store for non-volatile and volatile variables, and registers\r
	106	notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	107	\r
	108	@param ImageHandle The Image handle of this driver.\r
	109	@param SystemTable The pointer of EFI_SYSTEM_TABLE.\r
	110	\r
	111	@retval EFI_SUCCESS Variable service successfully initialized.\r
	112	\r
	113	**/\r
8d3a5c82	114	EFI_STATUS\r
	115	EFIAPI\r
	116	VariableServiceInitialize (\r
	117	IN EFI_HANDLE ImageHandle,\r
	118	IN EFI_SYSTEM_TABLE *SystemTable\r
ed66e1bc	119	);\r
8d3a5c82	120	\r
1794e506	121	/**\r
	122	Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r
	123	\r
	124	This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	125	It convers pointer to new virtual address.\r
	126	\r
	127	@param Event Event whose notification function is being invoked.\r
	128	@param Context Pointer to the notification function's context.\r
	129	\r
	130	**/\r
8d3a5c82	131	VOID\r
	132	EFIAPI\r
	133	VariableClassAddressChangeEvent (\r
	134	IN EFI_EVENT Event,\r
	135	IN VOID *Context\r
ed66e1bc	136	);\r
8d3a5c82	137	\r
1794e506	138	/**\r
	139	This code finds variable in storage blocks (Volatile or Non-Volatile).\r
	140	\r
	141	@param VariableName A Null-terminated Unicode string that is the name of\r
	142	the vendor's variable.\r
	143	@param VendorGuid A unique identifier for the vendor.\r
	144	@param Attributes If not NULL, a pointer to the memory location to return the \r
	145	attributes bitmask for the variable.\r
	146	@param DataSize Size of Data found. If size is less than the\r
	147	data, this value contains the required size.\r
	148	@param Data On input, the size in bytes of the return Data buffer. \r
	149	On output, the size of data returned in Data.\r
	150	@param Global Pointer to VARIABLE_GLOBAL structure\r
	151	@param Instance Instance of the Firmware Volume.\r
	152	\r
	153	@retval EFI_SUCCESS The function completed successfully. \r
	154	@retval EFI_NOT_FOUND The variable was not found.\r
	155	@retval EFI_BUFFER_TOO_SMALL DataSize is too small for the result. DataSize has \r
	156	been updated with the size needed to complete the request.\r
	157	@retval EFI_INVALID_PARAMETER VariableName or VendorGuid or DataSize is NULL.\r
	158	\r
	159	**/\r
8d3a5c82	160	EFI_STATUS\r
	161	EFIAPI\r
	162	GetVariable (\r
	163	IN CHAR16 *VariableName,\r
	164	IN EFI_GUID * VendorGuid,\r
	165	OUT UINT32 *Attributes OPTIONAL,\r
	166	IN OUT UINTN *DataSize,\r
	167	OUT VOID *Data,\r
	168	IN VARIABLE_GLOBAL * Global,\r
	169	IN UINT32 Instance\r
ed66e1bc	170	);\r
8d3a5c82	171	\r
1794e506	172	/**\r
	173	\r
	174	This code finds the next available variable.\r
	175	\r
	176	@param VariableNameSize Size of the variable.\r
	177	@param VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r
	178	On output, returns the Null-terminated Unicode string of the current variable.\r
	179	@param VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r
	180	On output, returns the VendorGuid of the current variable. \r
	181	@param Global Pointer to VARIABLE_GLOBAL structure.\r
	182	@param Instance Instance of the Firmware Volume.\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 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	\r
	190	**/\r
8d3a5c82	191	EFI_STATUS\r
	192	EFIAPI\r
	193	GetNextVariableName (\r
	194	IN OUT UINTN *VariableNameSize,\r
	195	IN OUT CHAR16 *VariableName,\r
	196	IN OUT EFI_GUID *VendorGuid,\r
	197	IN VARIABLE_GLOBAL *Global,\r
	198	IN UINT32 Instance\r
ed66e1bc	199	);\r
8d3a5c82	200	\r
1794e506	201	/**\r
	202	\r
	203	This code sets variable in storage blocks (Volatile or Non-Volatile).\r
	204	\r
	205	@param VariableName A Null-terminated Unicode string that is the name of the vendor's\r
	206	variable. Each VariableName is unique for each \r
	207	VendorGuid. VariableName must contain 1 or more \r
	208	Unicode characters. If VariableName is an empty Unicode \r
	209	string, then EFI_INVALID_PARAMETER is returned.\r
	210	@param VendorGuid A unique identifier for the vendor\r
	211	@param Attributes Attributes bitmask to set for the variable\r
	212	@param DataSize The size in bytes of the Data buffer. A size of zero causes the\r
	213	variable to be deleted.\r
	214	@param Data The contents for the variable\r
	215	@param Global Pointer to VARIABLE_GLOBAL structure\r
	216	@param VolatileOffset The offset of last volatile variable\r
	217	@param NonVolatileOffset The offset of last non-volatile variable\r
	218	@param Instance Instance of the Firmware Volume.\r
	219	\r
	220	@retval EFI_SUCCESS The firmware has successfully stored the variable and its data as \r
	221	defined by the Attributes.\r
	222	@retval EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied, or the \r
	223	DataSize exceeds the maximum allowed, or VariableName is an empty \r
	224	Unicode string, or VendorGuid is NULL.\r
	225	@retval EFI_OUT_OF_RESOURCES Not enough storage is available to hold the variable and its data.\r
	226	@retval EFI_DEVICE_ERROR The variable could not be saved due to a hardware failure.\r
	227	@retval EFI_WRITE_PROTECTED The variable in question is read-only or cannot be deleted.\r
	228	@retval EFI_NOT_FOUND The variable trying to be updated or deleted was not found.\r
	229	\r
	230	**/\r
8d3a5c82	231	EFI_STATUS\r
	232	EFIAPI\r
	233	SetVariable (\r
	234	IN CHAR16 *VariableName,\r
	235	IN EFI_GUID *VendorGuid,\r
	236	IN UINT32 Attributes,\r
	237	IN UINTN DataSize,\r
	238	IN VOID *Data,\r
	239	IN VARIABLE_GLOBAL *Global,\r
	240	IN UINTN *VolatileOffset,\r
	241	IN UINTN *NonVolatileOffset,\r
	242	IN UINT32 Instance\r
ed66e1bc	243	);\r
8d3a5c82	244	\r
1794e506	245	/**\r
	246	\r
	247	This code returns information about the EFI variables.\r
	248	\r
	249	@param Attributes Attributes bitmask to specify the type of variables\r
	250	on which to return information.\r
	251	@param MaximumVariableStorageSize On output the maximum size of the storage space available for \r
	252	the EFI variables associated with the attributes specified. \r
	253	@param RemainingVariableStorageSize Returns the remaining size of the storage space available for EFI \r
	254	variables associated with the attributes specified.\r
	255	@param MaximumVariableSize Returns the maximum size of an individual EFI variable \r
	256	associated with the attributes specified.\r
	257	@param Global Pointer to VARIABLE_GLOBAL structure.\r
	258	@param Instance Instance of the Firmware Volume.\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
8d3a5c82	267	EFI_STATUS\r
	268	EFIAPI\r
	269	QueryVariableInfo (\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	IN UINT32 Instance\r
ed66e1bc	276	);\r
8d3a5c82	277	\r
8d3a5c82	278	#endif\r