[mirror_edk2.git] / EdkCompatibilityPkg / Compatibility / LegacyRegion2OnLegacyRegionThunk / LegacyRegion2OnLegacyRegionThunk.c

/** @file\r
  Implementation of Legacy Region 2 Protocol based on Framework Legacy Region Protocol.\r
\r
  Intel's Framework Legacy Region Protocol is replaced by Legacy Region 2 Protocol in PI 1.2.\r
  This module produces PI Legacy Region 2 Protocol on top of Framework Legacy Region Protocol.\r
\r
Copyright (c) 2009 - 2010, 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
#include "LegacyRegion2OnLegacyRegionThunk.h"\r
\r
EFI_HANDLE   mLegacyRegion2Handle = NULL;\r
\r
EFI_LEGACY_REGION_PROTOCOL *mLegacyRegion;\r
\r
EFI_LEGACY_REGION2_PROTOCOL  mLegacyRegion2 = {\r
  LegacyRegion2Decode,\r
  LegacyRegion2Lock,\r
  LegacyRegion2BootLock,\r
  LegacyRegion2Unlock,\r
  LegacyRegionGetInfo\r
};\r
\r
/**\r
  Modify the hardware to allow (decode) or disallow (not decode) memory reads in a region.\r
\r
  If the On parameter evaluates to TRUE, this function enables memory reads in the address range \r
  Start to (Start + Length - 1).\r
  If the On parameter evaluates to FALSE, this function disables memory reads in the address range \r
  Start to (Start + Length - 1).\r
\r
  @param  This[in]              Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
  @param  Start[in]             The beginning of the physical address of the region whose attributes\r
                                should be modified.\r
  @param  Length[in]            The number of bytes of memory whose attributes should be modified.\r
                                The actual number of bytes modified may be greater than the number\r
                                specified.\r
  @param  Granularity[out]      The number of bytes in the last region affected. This may be less\r
                                than the total number of bytes affected if the starting address\r
                                was not aligned to a region's starting address or if the length\r
                                was greater than the number of bytes in the first region.\r
  @param  On[in]                Decode / Non-Decode flag.\r
\r
  @retval EFI_SUCCESS           The region's attributes were successfully modified.\r
  @retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegion2Decode (\r
  IN  EFI_LEGACY_REGION2_PROTOCOL  *This,\r
  IN  UINT32                       Start,\r
  IN  UINT32                       Length,\r
  OUT UINT32                       *Granularity,\r
  IN  BOOLEAN                      *On\r
  )\r
{\r
  if ((Start < 0xC0000) || ((Start + Length - 1) > 0xFFFFF)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  ASSERT (Granularity != NULL);\r
  *Granularity = 0;\r
\r
  return mLegacyRegion->Decode (\r
                          mLegacyRegion,\r
                          Start,\r
                          Length,\r
                          On\r
                          );\r
}\r
\r
/**\r
  Modify the hardware to disallow memory writes in a region.\r
\r
  This function changes the attributes of a memory range to not allow writes.\r
\r
  @param  This[in]              Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
  @param  Start[in]             The beginning of the physical address of the region whose\r
                                attributes should be modified.\r
  @param  Length[in]            The number of bytes of memory whose attributes should be modified.\r
                                The actual number of bytes modified may be greater than the number\r
                                specified.\r
  @param  Granularity[out]      The number of bytes in the last region affected. This may be less\r
                                than the total number of bytes affected if the starting address was\r
                                not aligned to a region's starting address or if the length was\r
                                greater than the number of bytes in the first region.\r
\r
  @retval EFI_SUCCESS           The region's attributes were successfully modified.\r
  @retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegion2Lock (\r
  IN  EFI_LEGACY_REGION2_PROTOCOL *This,\r
  IN  UINT32                      Start,\r
  IN  UINT32                      Length,\r
  OUT UINT32                      *Granularity\r
  )\r
{\r
  if ((Start < 0xC0000) || ((Start + Length - 1) > 0xFFFFF)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  ASSERT (Granularity != NULL);\r
\r
  return mLegacyRegion->Lock (\r
                          mLegacyRegion,\r
                          Start,\r
                          Length,\r
                          Granularity\r
                          );\r
}\r
\r
/**\r
  Modify the hardware to disallow memory attribute changes in a region.\r
\r
  This function makes the attributes of a region read only. Once a region is boot-locked with this \r
  function, the read and write attributes of that region cannot be changed until a power cycle has\r
  reset the boot-lock attribute. Calls to Decode(), Lock() and Unlock() will have no effect.\r
\r
  @param  This[in]              Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
  @param  Start[in]             The beginning of the physical address of the region whose\r
                                attributes should be modified.\r
  @param  Length[in]            The number of bytes of memory whose attributes should be modified.\r
                                The actual number of bytes modified may be greater than the number\r
                                specified.\r
  @param  Granularity[out]      The number of bytes in the last region affected. This may be less\r
                                than the total number of bytes affected if the starting address was\r
                                not aligned to a region's starting address or if the length was\r
                                greater than the number of bytes in the first region.\r
\r
  @retval EFI_SUCCESS           The region's attributes were successfully modified.\r
  @retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
  @retval EFI_UNSUPPORTED       The chipset does not support locking the configuration registers in\r
                                a way that will not affect memory regions outside the legacy memory\r
                                region.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegion2BootLock (\r
  IN  EFI_LEGACY_REGION2_PROTOCOL         *This,\r
  IN  UINT32                              Start,\r
  IN  UINT32                              Length,\r
  OUT UINT32                              *Granularity\r
  )\r
{\r
  if ((Start < 0xC0000) || ((Start + Length - 1) > 0xFFFFF)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  //\r
  // PI Legacy Region 2 Protocol and Framework Legacy Region Protocol have different\r
  // semantic of BootLock() API, so we cannot thunk to Framework Legacy Region Protocol\r
  // to produce the functionality of PI version. In addition, this functionality is\r
  // chipset dependent, so here we return EFI_UNSUPPORTED, which is a valid return status\r
  // code specified by PI spec.\r
  //\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  Modify the hardware to allow memory writes in a region.\r
\r
  This function changes the attributes of a memory range to allow writes.  \r
\r
  @param  This[in]              Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
  @param  Start[in]             The beginning of the physical address of the region whose\r
                                attributes should be modified.\r
  @param  Length[in]            The number of bytes of memory whose attributes should be modified.\r
                                The actual number of bytes modified may be greater than the number\r
                                specified.\r
  @param  Granularity[out]      The number of bytes in the last region affected. This may be less\r
                                than the total number of bytes affected if the starting address was\r
                                not aligned to a region's starting address or if the length was\r
                                greater than the number of bytes in the first region.\r
\r
  @retval EFI_SUCCESS           The region's attributes were successfully modified.\r
  @retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegion2Unlock (\r
  IN  EFI_LEGACY_REGION2_PROTOCOL  *This,\r
  IN  UINT32                       Start,\r
  IN  UINT32                       Length,\r
  OUT UINT32                       *Granularity\r
  )\r
{\r
  if ((Start < 0xC0000) || ((Start + Length - 1) > 0xFFFFF)) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  ASSERT (Granularity != NULL);\r
\r
  return mLegacyRegion->UnLock (\r
                          mLegacyRegion,\r
                          Start,\r
                          Length,\r
                          Granularity\r
                          );\r
}\r
\r
/**\r
  Get region information for the attributes of the Legacy Region.\r
\r
  This function is used to discover the granularity of the attributes for the memory in the legacy \r
  region. Each attribute may have a different granularity and the granularity may not be the same\r
  for all memory ranges in the legacy region.  \r
\r
  @param  This[in]              Indicates the EFI_LEGACY_REGION2_PROTOCOL instance.\r
  @param  DescriptorCount[out]  The number of region descriptor entries returned in the Descriptor\r
                                buffer.\r
  @param  Descriptor[out]       A pointer to a pointer used to return a buffer where the legacy\r
                                region information is deposited. This buffer will contain a list of\r
                                DescriptorCount number of region descriptors.  This function will\r
                                provide the memory for the buffer.\r
\r
  @retval EFI_SUCCESS           The information structure was returned.\r
  @retval EFI_UNSUPPORTED       This function is not supported.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegionGetInfo (\r
  IN  EFI_LEGACY_REGION2_PROTOCOL   *This,\r
  OUT UINT32                        *DescriptorCount,\r
  OUT EFI_LEGACY_REGION_DESCRIPTOR  **Descriptor\r
  )\r
{\r
  return EFI_UNSUPPORTED;\r
}\r
\r
/**\r
  The user Entry Point for module LegacyRegionDxe.  The user code starts with this function.\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       The entry point is executed successfully.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
LegacyRegion2OnLegacyRegionThunkInitialize (\r
  IN EFI_HANDLE        ImageHandle,\r
  IN EFI_SYSTEM_TABLE  *SystemTable\r
  )\r
{\r
  EFI_STATUS  Status;\r
  \r
  //\r
  // Make sure the Legacy Region 2 Protocol is not already installed in the system\r
  //\r
  ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiLegacyRegion2ProtocolGuid);\r
  \r
  //\r
  // Locate and cache Framework Legacy Region Protocol.\r
  //\r
  Status = gBS->LocateProtocol (\r
                  &gEfiLegacyRegionProtocolGuid, \r
                  NULL, \r
                  (VOID **) &mLegacyRegion\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  //\r
  // Install the protocol on a new handle.\r
  //\r
  Status = gBS->InstallMultipleProtocolInterfaces (\r
                  &mLegacyRegion2Handle,\r
                  &gEfiLegacyRegion2ProtocolGuid, &mLegacyRegion2,\r
                  NULL\r
                  );\r
  ASSERT_EFI_ERROR (Status);\r
\r
  return Status;\r
}\r
Commit	Line	Data
650efd74	1	/** @file\r
	2	Implementation of Legacy Region 2 Protocol based on Framework Legacy Region Protocol.\r
	3	\r
	4	Intel's Framework Legacy Region Protocol is replaced by Legacy Region 2 Protocol in PI 1.2.\r
	5	This module produces PI Legacy Region 2 Protocol on top of Framework Legacy Region Protocol.\r
	6	\r
2ae0d120	7	Copyright (c) 2009 - 2010, Intel Corporation\r
650efd74	8	All rights reserved. This program and the accompanying materials\r
	9	are licensed and made available under the terms and conditions of the BSD License\r
	10	which accompanies this distribution. The full text of the license may be found at\r
	11	http://opensource.org/licenses/bsd-license.php\r
	12	\r
	13	THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	14	WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	15	\r
	16	**/\r
	17	\r
	18	#include "LegacyRegion2OnLegacyRegionThunk.h"\r
	19	\r
	20	EFI_HANDLE mLegacyRegion2Handle = NULL;\r
	21	\r
	22	EFI_LEGACY_REGION_PROTOCOL *mLegacyRegion;\r
	23	\r
	24	EFI_LEGACY_REGION2_PROTOCOL mLegacyRegion2 = {\r
	25	LegacyRegion2Decode,\r
	26	LegacyRegion2Lock,\r
	27	LegacyRegion2BootLock,\r
	28	LegacyRegion2Unlock,\r
	29	LegacyRegionGetInfo\r
	30	};\r
	31	\r
	32	/**\r
	33	Modify the hardware to allow (decode) or disallow (not decode) memory reads in a region.\r
	34	\r
	35	If the On parameter evaluates to TRUE, this function enables memory reads in the address range \r
	36	Start to (Start + Length - 1).\r
	37	If the On parameter evaluates to FALSE, this function disables memory reads in the address range \r
	38	Start to (Start + Length - 1).\r
	39	\r
	40	@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
	41	@param Start[in] The beginning of the physical address of the region whose attributes\r
	42	should be modified.\r
	43	@param Length[in] The number of bytes of memory whose attributes should be modified.\r
	44	The actual number of bytes modified may be greater than the number\r
	45	specified.\r
	46	@param Granularity[out] The number of bytes in the last region affected. This may be less\r
	47	than the total number of bytes affected if the starting address\r
	48	was not aligned to a region's starting address or if the length\r
	49	was greater than the number of bytes in the first region.\r
	50	@param On[in] Decode / Non-Decode flag.\r
	51	\r
	52	@retval EFI_SUCCESS The region's attributes were successfully modified.\r
	53	@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
	54	\r
	55	**/\r
	56	EFI_STATUS\r
	57	EFIAPI\r
	58	LegacyRegion2Decode (\r
	59	IN EFI_LEGACY_REGION2_PROTOCOL *This,\r
	60	IN UINT32 Start,\r
	61	IN UINT32 Length,\r
	62	OUT UINT32 *Granularity,\r
	63	IN BOOLEAN *On\r
	64	)\r
	65	{\r
2ae0d120	66	if ((Start < 0xC0000) \|\| ((Start + Length - 1) > 0xFFFFF)) {\r
	67	return EFI_INVALID_PARAMETER;\r
	68	}\r
	69	\r
650efd74	70	ASSERT (Granularity != NULL);\r
	71	*Granularity = 0;\r
	72	\r
	73	return mLegacyRegion->Decode (\r
	74	mLegacyRegion,\r
	75	Start,\r
	76	Length,\r
	77	On\r
	78	);\r
	79	}\r
	80	\r
	81	/**\r
	82	Modify the hardware to disallow memory writes in a region.\r
	83	\r
	84	This function changes the attributes of a memory range to not allow writes.\r
	85	\r
	86	@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
	87	@param Start[in] The beginning of the physical address of the region whose\r
	88	attributes should be modified.\r
	89	@param Length[in] The number of bytes of memory whose attributes should be modified.\r
	90	The actual number of bytes modified may be greater than the number\r
	91	specified.\r
	92	@param Granularity[out] The number of bytes in the last region affected. This may be less\r
	93	than the total number of bytes affected if the starting address was\r
	94	not aligned to a region's starting address or if the length was\r
	95	greater than the number of bytes in the first region.\r
	96	\r
	97	@retval EFI_SUCCESS The region's attributes were successfully modified.\r
	98	@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
	99	\r
	100	**/\r
	101	EFI_STATUS\r
	102	EFIAPI\r
	103	LegacyRegion2Lock (\r
	104	IN EFI_LEGACY_REGION2_PROTOCOL *This,\r
	105	IN UINT32 Start,\r
	106	IN UINT32 Length,\r
	107	OUT UINT32 *Granularity\r
	108	)\r
	109	{\r
2ae0d120	110	if ((Start < 0xC0000) \|\| ((Start + Length - 1) > 0xFFFFF)) {\r
	111	return EFI_INVALID_PARAMETER;\r
	112	}\r
	113	\r
650efd74	114	ASSERT (Granularity != NULL);\r
	115	\r
	116	return mLegacyRegion->Lock (\r
	117	mLegacyRegion,\r
	118	Start,\r
	119	Length,\r
	120	Granularity\r
	121	);\r
	122	}\r
	123	\r
	124	/**\r
	125	Modify the hardware to disallow memory attribute changes in a region.\r
	126	\r
	127	This function makes the attributes of a region read only. Once a region is boot-locked with this \r
	128	function, the read and write attributes of that region cannot be changed until a power cycle has\r
	129	reset the boot-lock attribute. Calls to Decode(), Lock() and Unlock() will have no effect.\r
	130	\r
	131	@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
	132	@param Start[in] The beginning of the physical address of the region whose\r
	133	attributes should be modified.\r
	134	@param Length[in] The number of bytes of memory whose attributes should be modified.\r
	135	The actual number of bytes modified may be greater than the number\r
	136	specified.\r
	137	@param Granularity[out] The number of bytes in the last region affected. This may be less\r
	138	than the total number of bytes affected if the starting address was\r
	139	not aligned to a region's starting address or if the length was\r
	140	greater than the number of bytes in the first region.\r
	141	\r
	142	@retval EFI_SUCCESS The region's attributes were successfully modified.\r
	143	@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
	144	@retval EFI_UNSUPPORTED The chipset does not support locking the configuration registers in\r
	145	a way that will not affect memory regions outside the legacy memory\r
	146	region.\r
	147	\r
	148	**/\r
	149	EFI_STATUS\r
	150	EFIAPI\r
	151	LegacyRegion2BootLock (\r
	152	IN EFI_LEGACY_REGION2_PROTOCOL *This,\r
	153	IN UINT32 Start,\r
	154	IN UINT32 Length,\r
	155	OUT UINT32 *Granularity\r
	156	)\r
	157	{\r
2ae0d120	158	if ((Start < 0xC0000) \|\| ((Start + Length - 1) > 0xFFFFF)) {\r
	159	return EFI_INVALID_PARAMETER;\r
	160	}\r
	161	\r
	162	//\r
	163	// PI Legacy Region 2 Protocol and Framework Legacy Region Protocol have different\r
	164	// semantic of BootLock() API, so we cannot thunk to Framework Legacy Region Protocol\r
	165	// to produce the functionality of PI version. In addition, this functionality is\r
	166	// chipset dependent, so here we return EFI_UNSUPPORTED, which is a valid return status\r
	167	// code specified by PI spec.\r
	168	//\r
	169	return EFI_UNSUPPORTED;\r
650efd74	170	}\r
	171	\r
	172	/**\r
	173	Modify the hardware to allow memory writes in a region.\r
	174	\r
	175	This function changes the attributes of a memory range to allow writes. \r
	176	\r
	177	@param This[in] Indicates the EFI_LEGACY_REGION_PROTOCOL instance.\r
	178	@param Start[in] The beginning of the physical address of the region whose\r
	179	attributes should be modified.\r
	180	@param Length[in] The number of bytes of memory whose attributes should be modified.\r
	181	The actual number of bytes modified may be greater than the number\r
	182	specified.\r
	183	@param Granularity[out] The number of bytes in the last region affected. This may be less\r
	184	than the total number of bytes affected if the starting address was\r
	185	not aligned to a region's starting address or if the length was\r
	186	greater than the number of bytes in the first region.\r
	187	\r
	188	@retval EFI_SUCCESS The region's attributes were successfully modified.\r
	189	@retval EFI_INVALID_PARAMETER If Start or Length describe an address not in the Legacy Region.\r
	190	\r
	191	**/\r
	192	EFI_STATUS\r
	193	EFIAPI\r
	194	LegacyRegion2Unlock (\r
	195	IN EFI_LEGACY_REGION2_PROTOCOL *This,\r
	196	IN UINT32 Start,\r
	197	IN UINT32 Length,\r
	198	OUT UINT32 *Granularity\r
	199	)\r
	200	{\r
2ae0d120	201	if ((Start < 0xC0000) \|\| ((Start + Length - 1) > 0xFFFFF)) {\r
	202	return EFI_INVALID_PARAMETER;\r
	203	}\r
	204	\r
650efd74	205	ASSERT (Granularity != NULL);\r
	206	\r
	207	return mLegacyRegion->UnLock (\r
	208	mLegacyRegion,\r
	209	Start,\r
	210	Length,\r
	211	Granularity\r
	212	);\r
	213	}\r
	214	\r
	215	/**\r
	216	Get region information for the attributes of the Legacy Region.\r
	217	\r
	218	This function is used to discover the granularity of the attributes for the memory in the legacy \r
	219	region. Each attribute may have a different granularity and the granularity may not be the same\r
	220	for all memory ranges in the legacy region. \r
	221	\r
2ae0d120	222	@param This[in] Indicates the EFI_LEGACY_REGION2_PROTOCOL instance.\r
650efd74	223	@param DescriptorCount[out] The number of region descriptor entries returned in the Descriptor\r
	224	buffer.\r
	225	@param Descriptor[out] A pointer to a pointer used to return a buffer where the legacy\r
	226	region information is deposited. This buffer will contain a list of\r
	227	DescriptorCount number of region descriptors. This function will\r
	228	provide the memory for the buffer.\r
	229	\r
2ae0d120	230	@retval EFI_SUCCESS The information structure was returned.\r
2ae0d120	231	@retval EFI_UNSUPPORTED This function is not supported.\r
650efd74	232	\r
	233	**/\r
	234	EFI_STATUS\r
	235	EFIAPI\r
	236	LegacyRegionGetInfo (\r
	237	IN EFI_LEGACY_REGION2_PROTOCOL *This,\r
	238	OUT UINT32 *DescriptorCount,\r
	239	OUT EFI_LEGACY_REGION_DESCRIPTOR **Descriptor\r
	240	)\r
	241	{\r
	242	return EFI_UNSUPPORTED;\r
	243	}\r
	244	\r
	245	/**\r
	246	The user Entry Point for module LegacyRegionDxe. The user code starts with this function.\r
	247	\r
	248	@param[in] ImageHandle The firmware allocated handle for the EFI image. \r
	249	@param[in] SystemTable A pointer to the EFI System Table.\r
	250	\r
	251	@retval EFI_SUCCESS The entry point is executed successfully.\r
	252	\r
	253	**/\r
	254	EFI_STATUS\r
	255	EFIAPI\r
	256	LegacyRegion2OnLegacyRegionThunkInitialize (\r
	257	IN EFI_HANDLE ImageHandle,\r
	258	IN EFI_SYSTEM_TABLE *SystemTable\r
	259	)\r
	260	{\r
	261	EFI_STATUS Status;\r
	262	\r
	263	//\r
	264	// Make sure the Legacy Region 2 Protocol is not already installed in the system\r
	265	//\r
	266	ASSERT_PROTOCOL_ALREADY_INSTALLED (NULL, &gEfiLegacyRegion2ProtocolGuid);\r
	267	\r
	268	//\r
	269	// Locate and cache Framework Legacy Region Protocol.\r
	270	//\r
	271	Status = gBS->LocateProtocol (\r
	272	&gEfiLegacyRegionProtocolGuid, \r
	273	NULL, \r
	274	(VOID **) &mLegacyRegion\r
	275	);\r
	276	ASSERT_EFI_ERROR (Status);\r
	277	\r
	278	//\r
	279	// Install the protocol on a new handle.\r
	280	//\r
	281	Status = gBS->InstallMultipleProtocolInterfaces (\r
	282	&mLegacyRegion2Handle,\r
	283	&gEfiLegacyRegion2ProtocolGuid, &mLegacyRegion2,\r
	284	NULL\r
	285	);\r
	286	ASSERT_EFI_ERROR (Status);\r
	287	\r
	288	return Status;\r
	289	}\r