[mirror_edk2.git] / MdeModulePkg / Universal / Variable / EmuRuntimeDxe / InitVariable.c

/** @file\r
\r
  Implment all four UEFI runtime variable services and\r
  install variable architeture protocol.\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
#include "Variable.h"\r
\r
EFI_EVENT   mVirtualAddressChangeEvent = NULL;\r
\r
/**\r
\r
  This code finds variable in storage blocks (Volatile or Non-Volatile).\r
\r
  @param VariableName               Name of Variable to be found.\r
  @param VendorGuid                 Variable vendor GUID.\r
  @param Attributes                 Attribute value of the variable found.\r
  @param DataSize                   Size of Data found. If size is less than the\r
                                    data, this value contains the required size.\r
  @param Data                       The buffer to return the contents of the variable. May be NULL\r
                                    with a zero DataSize in order to determine the size buffer needed.\r
\r
  @return EFI_INVALID_PARAMETER     Invalid parameter\r
  @return EFI_SUCCESS               Find the specified variable\r
  @return EFI_NOT_FOUND             Not found\r
  @return EFI_BUFFER_TO_SMALL       DataSize is too small for the result\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RuntimeServiceGetVariable (\r
  IN CHAR16        *VariableName,\r
  IN EFI_GUID      *VendorGuid,\r
  OUT UINT32       *Attributes OPTIONAL,\r
  IN OUT UINTN     *DataSize,\r
  OUT VOID         *Data OPTIONAL\r
  )\r
{\r
  return EmuGetVariable (\r
          VariableName,\r
          VendorGuid,\r
          Attributes OPTIONAL,\r
          DataSize,\r
          Data,\r
          &mVariableModuleGlobal->VariableGlobal[Physical]\r
          );\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
\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
RuntimeServiceGetNextVariableName (\r
  IN OUT UINTN     *VariableNameSize,\r
  IN OUT CHAR16    *VariableName,\r
  IN OUT EFI_GUID  *VendorGuid\r
  )\r
{\r
  return EmuGetNextVariableName (\r
          VariableNameSize,\r
          VariableName,\r
          VendorGuid,\r
          &mVariableModuleGlobal->VariableGlobal[Physical]\r
          );\r
}\r
\r
/**\r
\r
  This code sets variable in storage blocks (Volatile or Non-Volatile).\r
\r
  @param VariableName                     Name of Variable to be found\r
  @param VendorGuid                       Variable vendor GUID\r
  @param Attributes                       Attribute value of the variable found\r
  @param DataSize                         Size of Data found. If size is less than the\r
                                          data, this value contains the required size.\r
  @param Data                             Data pointer\r
\r
  @return EFI_INVALID_PARAMETER           Invalid parameter\r
  @return EFI_SUCCESS                     Set successfully\r
  @return EFI_OUT_OF_RESOURCES            Resource not enough to set variable\r
  @return EFI_NOT_FOUND                   Not found\r
  @return EFI_WRITE_PROTECTED             Variable is read-only\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RuntimeServiceSetVariable (\r
  IN CHAR16        *VariableName,\r
  IN EFI_GUID      *VendorGuid,\r
  IN UINT32        Attributes,\r
  IN UINTN         DataSize,\r
  IN VOID          *Data\r
  )\r
{\r
  return EmuSetVariable (\r
          VariableName,\r
          VendorGuid,\r
          Attributes,\r
          DataSize,\r
          Data,\r
          &mVariableModuleGlobal->VariableGlobal[Physical],\r
          &mVariableModuleGlobal->VolatileLastVariableOffset,\r
          &mVariableModuleGlobal->NonVolatileLastVariableOffset\r
          );\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     Pointer to the maximum size of the storage space available\r
                                        for the EFI variables associated with the attributes specified.\r
  @param RemainingVariableStorageSize   Pointer to the remaining size of the storage space available\r
                                        for EFI variables associated with the attributes specified.\r
  @param MaximumVariableSize            Pointer to the maximum size of an individual EFI variables\r
                                        associated with the attributes specified.\r
\r
  @return EFI_INVALID_PARAMETER         An invalid combination of attribute bits was supplied.\r
  @return EFI_SUCCESS                   Query successfully.\r
  @return EFI_UNSUPPORTED               The attribute is not supported on this platform.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
RuntimeServiceQueryVariableInfo (\r
  IN  UINT32                 Attributes,\r
  OUT UINT64                 *MaximumVariableStorageSize,\r
  OUT UINT64                 *RemainingVariableStorageSize,\r
  OUT UINT64                 *MaximumVariableSize\r
  )\r
{\r
  return EmuQueryVariableInfo (\r
          Attributes,\r
          MaximumVariableStorageSize,\r
          RemainingVariableStorageSize,\r
          MaximumVariableSize,\r
          &mVariableModuleGlobal->VariableGlobal[Physical]\r
          );\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
  EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLangCodes);\r
  EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->LangCodes);\r
  EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLang);\r
  EfiConvertPointer (\r
    0x0,\r
    (VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].NonVolatileVariableBase\r
    );\r
  EfiConvertPointer (\r
    0x0,\r
    (VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].VolatileVariableBase\r
    );\r
  EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);\r
}\r
\r
/**\r
  EmuVariable Driver main entry point. The Variable driver places the 4 EFI\r
  runtime services in the EFI System Table and installs arch protocols\r
  for variable read and write services being available. It also registers\r
  notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
\r
  @param[in] ImageHandle    The firmware allocated handle for the EFI image.\r
  @param[in] SystemTable    A pointer to the 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
  EFI_HANDLE  NewHandle;\r
  EFI_STATUS  Status;\r
\r
  Status = VariableCommonInitialize (ImageHandle, SystemTable);\r
  ASSERT_EFI_ERROR (Status);\r
\r
  SystemTable->RuntimeServices->GetVariable         = RuntimeServiceGetVariable;\r
  SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;\r
  SystemTable->RuntimeServices->SetVariable         = RuntimeServiceSetVariable;\r
  SystemTable->RuntimeServices->QueryVariableInfo   = RuntimeServiceQueryVariableInfo;\r
\r
  //\r
  // Now install the Variable Runtime Architectural Protocol on a new handle\r
  //\r
  NewHandle = NULL;\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &NewHandle,\r
                  &gEfiVariableArchProtocolGuid,\r
                  NULL,\r
                  &gEfiVariableWriteArchProtocolGuid,\r
                  NULL,\r
                  NULL\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  Status = gBS->CreateEventEx (\r
                  EVT_NOTIFY_SIGNAL,\r
                  TPL_NOTIFY,\r
                  VariableClassAddressChangeEvent,\r
                  NULL,\r
                  &gEfiEventVirtualAddressChangeGuid,\r
                  &mVirtualAddressChangeEvent\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return EFI_SUCCESS;\r
}\r
Commit	Line	Data
	1	/** @file\r
	2	\r
	3	Implment all four UEFI runtime variable services and\r
	4	install variable architeture protocol.\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	#include "Variable.h"\r
	18	\r
	19	EFI_EVENT mVirtualAddressChangeEvent = NULL;\r
	20	\r
	21	/**\r
	22	\r
	23	This code finds variable in storage blocks (Volatile or Non-Volatile).\r
	24	\r
	25	@param VariableName Name of Variable to be found.\r
	26	@param VendorGuid Variable vendor GUID.\r
	27	@param Attributes Attribute value of the variable found.\r
	28	@param DataSize Size of Data found. If size is less than the\r
	29	data, this value contains the required size.\r
	30	@param Data The buffer to return the contents of the variable. May be NULL\r
	31	with a zero DataSize in order to determine the size buffer needed.\r
	32	\r
	33	@return EFI_INVALID_PARAMETER Invalid parameter\r
	34	@return EFI_SUCCESS Find the specified variable\r
	35	@return EFI_NOT_FOUND Not found\r
	36	@return EFI_BUFFER_TO_SMALL DataSize is too small for the result\r
	37	\r
	38	**/\r
	39	EFI_STATUS\r
	40	EFIAPI\r
	41	RuntimeServiceGetVariable (\r
	42	IN CHAR16 *VariableName,\r
	43	IN EFI_GUID *VendorGuid,\r
	44	OUT UINT32 *Attributes OPTIONAL,\r
	45	IN OUT UINTN *DataSize,\r
	46	OUT VOID *Data OPTIONAL\r
	47	)\r
	48	{\r
	49	return EmuGetVariable (\r
	50	VariableName,\r
	51	VendorGuid,\r
	52	Attributes OPTIONAL,\r
	53	DataSize,\r
	54	Data,\r
	55	&mVariableModuleGlobal->VariableGlobal[Physical]\r
	56	);\r
	57	}\r
	58	\r
	59	/**\r
	60	\r
	61	This code Finds the Next available variable.\r
	62	\r
	63	@param VariableNameSize The size of the VariableName buffer. The size must be large enough to fit input\r
	64	string supplied in VariableName buffer.\r
	65	@param VariableName On input, supplies the last VariableName that was returned by GetNextVariableName().\r
	66	On output, returns the Null-terminated Unicode string of the current variable.\r
	67	@param VendorGuid On input, supplies the last VendorGuid that was returned by GetNextVariableName().\r
	68	On output, returns the VendorGuid of the current variable.\r
	69	\r
	70	@retval EFI_SUCCESS The function completed successfully.\r
	71	@retval EFI_NOT_FOUND The next variable was not found.\r
	72	@retval EFI_BUFFER_TOO_SMALL The VariableNameSize is too small for the result.\r
	73	VariableNameSize has been updated with the size needed to complete the request.\r
	74	@retval EFI_INVALID_PARAMETER VariableNameSize or VariableName or VendorGuid is NULL.\r
	75	@retval EFI_INVALID_PARAMETER The input values of VariableName and VendorGuid are not a name and\r
	76	GUID of an existing variable.\r
	77	@retval EFI_INVALID_PARAMETER Null-terminator is not found in the first VariableNameSize bytes of\r
	78	the input VariableName buffer.\r
	79	\r
	80	**/\r
	81	EFI_STATUS\r
	82	EFIAPI\r
	83	RuntimeServiceGetNextVariableName (\r
	84	IN OUT UINTN *VariableNameSize,\r
	85	IN OUT CHAR16 *VariableName,\r
	86	IN OUT EFI_GUID *VendorGuid\r
	87	)\r
	88	{\r
	89	return EmuGetNextVariableName (\r
	90	VariableNameSize,\r
	91	VariableName,\r
	92	VendorGuid,\r
	93	&mVariableModuleGlobal->VariableGlobal[Physical]\r
	94	);\r
	95	}\r
	96	\r
	97	/**\r
	98	\r
	99	This code sets variable in storage blocks (Volatile or Non-Volatile).\r
	100	\r
	101	@param VariableName Name of Variable to be found\r
	102	@param VendorGuid Variable vendor GUID\r
	103	@param Attributes Attribute value of the variable found\r
	104	@param DataSize Size of Data found. If size is less than the\r
	105	data, this value contains the required size.\r
	106	@param Data Data pointer\r
	107	\r
	108	@return EFI_INVALID_PARAMETER Invalid parameter\r
	109	@return EFI_SUCCESS Set successfully\r
	110	@return EFI_OUT_OF_RESOURCES Resource not enough to set variable\r
	111	@return EFI_NOT_FOUND Not found\r
	112	@return EFI_WRITE_PROTECTED Variable is read-only\r
	113	\r
	114	**/\r
	115	EFI_STATUS\r
	116	EFIAPI\r
	117	RuntimeServiceSetVariable (\r
	118	IN CHAR16 *VariableName,\r
	119	IN EFI_GUID *VendorGuid,\r
	120	IN UINT32 Attributes,\r
	121	IN UINTN DataSize,\r
	122	IN VOID *Data\r
	123	)\r
	124	{\r
	125	return EmuSetVariable (\r
	126	VariableName,\r
	127	VendorGuid,\r
	128	Attributes,\r
	129	DataSize,\r
	130	Data,\r
	131	&mVariableModuleGlobal->VariableGlobal[Physical],\r
	132	&mVariableModuleGlobal->VolatileLastVariableOffset,\r
	133	&mVariableModuleGlobal->NonVolatileLastVariableOffset\r
	134	);\r
	135	}\r
	136	\r
	137	/**\r
	138	\r
	139	This code returns information about the EFI variables.\r
	140	\r
	141	@param Attributes Attributes bitmask to specify the type of variables\r
	142	on which to return information.\r
	143	@param MaximumVariableStorageSize Pointer to the maximum size of the storage space available\r
	144	for the EFI variables associated with the attributes specified.\r
	145	@param RemainingVariableStorageSize Pointer to the remaining size of the storage space available\r
	146	for EFI variables associated with the attributes specified.\r
	147	@param MaximumVariableSize Pointer to the maximum size of an individual EFI variables\r
	148	associated with the attributes specified.\r
	149	\r
	150	@return EFI_INVALID_PARAMETER An invalid combination of attribute bits was supplied.\r
	151	@return EFI_SUCCESS Query successfully.\r
	152	@return EFI_UNSUPPORTED The attribute is not supported on this platform.\r
	153	\r
	154	**/\r
	155	EFI_STATUS\r
	156	EFIAPI\r
	157	RuntimeServiceQueryVariableInfo (\r
	158	IN UINT32 Attributes,\r
	159	OUT UINT64 *MaximumVariableStorageSize,\r
	160	OUT UINT64 *RemainingVariableStorageSize,\r
	161	OUT UINT64 *MaximumVariableSize\r
	162	)\r
	163	{\r
	164	return EmuQueryVariableInfo (\r
	165	Attributes,\r
	166	MaximumVariableStorageSize,\r
	167	RemainingVariableStorageSize,\r
	168	MaximumVariableSize,\r
	169	&mVariableModuleGlobal->VariableGlobal[Physical]\r
	170	);\r
	171	}\r
	172	\r
	173	/**\r
	174	Notification function of EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE.\r
	175	\r
	176	This is a notification function registered on EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	177	It convers pointer to new virtual address.\r
	178	\r
	179	@param Event Event whose notification function is being invoked.\r
	180	@param Context Pointer to the notification function's context.\r
	181	\r
	182	**/\r
	183	VOID\r
	184	EFIAPI\r
	185	VariableClassAddressChangeEvent (\r
	186	IN EFI_EVENT Event,\r
	187	IN VOID *Context\r
	188	)\r
	189	{\r
	190	EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLangCodes);\r
	191	EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->LangCodes);\r
	192	EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal->PlatformLang);\r
	193	EfiConvertPointer (\r
	194	0x0,\r
	195	(VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].NonVolatileVariableBase\r
	196	);\r
	197	EfiConvertPointer (\r
	198	0x0,\r
	199	(VOID **) &mVariableModuleGlobal->VariableGlobal[Physical].VolatileVariableBase\r
	200	);\r
	201	EfiConvertPointer (0x0, (VOID **) &mVariableModuleGlobal);\r
	202	}\r
	203	\r
	204	/**\r
	205	EmuVariable Driver main entry point. The Variable driver places the 4 EFI\r
	206	runtime services in the EFI System Table and installs arch protocols\r
	207	for variable read and write services being available. It also registers\r
	208	notification function for EVT_SIGNAL_VIRTUAL_ADDRESS_CHANGE event.\r
	209	\r
	210	@param[in] ImageHandle The firmware allocated handle for the EFI image.\r
	211	@param[in] SystemTable A pointer to the EFI System Table.\r
	212	\r
	213	@retval EFI_SUCCESS Variable service successfully initialized.\r
	214	\r
	215	**/\r
	216	EFI_STATUS\r
	217	EFIAPI\r
	218	VariableServiceInitialize (\r
	219	IN EFI_HANDLE ImageHandle,\r
	220	IN EFI_SYSTEM_TABLE *SystemTable\r
	221	)\r
	222	{\r
	223	EFI_HANDLE NewHandle;\r
	224	EFI_STATUS Status;\r
	225	\r
	226	Status = VariableCommonInitialize (ImageHandle, SystemTable);\r
	227	ASSERT_EFI_ERROR (Status);\r
	228	\r
	229	SystemTable->RuntimeServices->GetVariable = RuntimeServiceGetVariable;\r
	230	SystemTable->RuntimeServices->GetNextVariableName = RuntimeServiceGetNextVariableName;\r
	231	SystemTable->RuntimeServices->SetVariable = RuntimeServiceSetVariable;\r
	232	SystemTable->RuntimeServices->QueryVariableInfo = RuntimeServiceQueryVariableInfo;\r
	233	\r
	234	//\r
	235	// Now install the Variable Runtime Architectural Protocol on a new handle\r
	236	//\r
	237	NewHandle = NULL;\r
	238	Status = gBS->InstallMultipleProtocolInterfaces (\r
	239	&NewHandle,\r
	240	&gEfiVariableArchProtocolGuid,\r
	241	NULL,\r
	242	&gEfiVariableWriteArchProtocolGuid,\r
	243	NULL,\r
	244	NULL\r
	245	);\r
	246	ASSERT_EFI_ERROR (Status);\r
	247	\r
	248	Status = gBS->CreateEventEx (\r
	249	EVT_NOTIFY_SIGNAL,\r
	250	TPL_NOTIFY,\r
	251	VariableClassAddressChangeEvent,\r
	252	NULL,\r
	253	&gEfiEventVirtualAddressChangeGuid,\r
	254	&mVirtualAddressChangeEvent\r
	255	);\r
	256	ASSERT_EFI_ERROR (Status);\r
	257	\r
	258	return EFI_SUCCESS;\r
	259	}\r