[mirror_edk2.git] / ArmPkg / Drivers / CpuDxe / CpuMmuCommon.c

/** @file\r
*\r
*  Copyright (c) 2013, ARM Limited. All rights reserved.\r
*\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 "CpuDxe.h"\r
\r
/**\r
  Searches memory descriptors covered by given memory range.\r
\r
  This function searches into the Gcd Memory Space for descriptors\r
  (from StartIndex to EndIndex) that contains the memory range\r
  specified by BaseAddress and Length.\r
\r
  @param  MemorySpaceMap       Gcd Memory Space Map as array.\r
  @param  NumberOfDescriptors  Number of descriptors in map.\r
  @param  BaseAddress          BaseAddress for the requested range.\r
  @param  Length               Length for the requested range.\r
  @param  StartIndex           Start index into the Gcd Memory Space Map.\r
  @param  EndIndex             End index into the Gcd Memory Space Map.\r
\r
  @retval EFI_SUCCESS          Search successfully.\r
  @retval EFI_NOT_FOUND        The requested descriptors does not exist.\r
\r
**/\r
EFI_STATUS\r
SearchGcdMemorySpaces (\r
  IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR    *MemorySpaceMap,\r
  IN UINTN                               NumberOfDescriptors,\r
  IN EFI_PHYSICAL_ADDRESS                BaseAddress,\r
  IN UINT64                              Length,\r
  OUT UINTN                             *StartIndex,\r
  OUT UINTN                             *EndIndex\r
  )\r
{\r
  UINTN           Index;\r
\r
  *StartIndex = 0;\r
  *EndIndex   = 0;\r
  for (Index = 0; Index < NumberOfDescriptors; Index++) {\r
    if ((BaseAddress >= MemorySpaceMap[Index].BaseAddress) &&\r
        (BaseAddress < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r
      *StartIndex = Index;\r
    }\r
    if (((BaseAddress + Length - 1) >= MemorySpaceMap[Index].BaseAddress) &&\r
        ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r
      *EndIndex = Index;\r
      return EFI_SUCCESS;\r
    }\r
  }\r
  return EFI_NOT_FOUND;\r
}\r
\r
\r
/**\r
  Sets the attributes for a specified range in Gcd Memory Space Map.\r
\r
  This function sets the attributes for a specified range in\r
  Gcd Memory Space Map.\r
\r
  @param  MemorySpaceMap       Gcd Memory Space Map as array\r
  @param  NumberOfDescriptors  Number of descriptors in map\r
  @param  BaseAddress          BaseAddress for the range\r
  @param  Length               Length for the range\r
  @param  Attributes           Attributes to set\r
\r
  @retval EFI_SUCCESS          Memory attributes set successfully\r
  @retval EFI_NOT_FOUND        The specified range does not exist in Gcd Memory Space\r
\r
**/\r
EFI_STATUS\r
SetGcdMemorySpaceAttributes (\r
  IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR    *MemorySpaceMap,\r
  IN UINTN                               NumberOfDescriptors,\r
  IN EFI_PHYSICAL_ADDRESS                BaseAddress,\r
  IN UINT64                              Length,\r
  IN UINT64                              Attributes\r
  )\r
{\r
  EFI_STATUS            Status;\r
  UINTN                 Index;\r
  UINTN                 StartIndex;\r
  UINTN                 EndIndex;\r
  EFI_PHYSICAL_ADDRESS  RegionStart;\r
  UINT64                RegionLength;\r
\r
  DEBUG ((DEBUG_GCD, "SetGcdMemorySpaceAttributes[0x%lX; 0x%lX] = 0x%lX\n",\r
      BaseAddress, BaseAddress + Length, Attributes));\r
\r
  // We do not support a smaller granularity than 4KB on ARM Architecture\r
  if ((Length & EFI_PAGE_MASK) != 0) {\r
    DEBUG ((DEBUG_WARN,\r
            "Warning: We do not support smaller granularity than 4KB on ARM Architecture (passed length: 0x%lX).\n",\r
            Length));\r
  }\r
\r
  //\r
  // Get all memory descriptors covered by the memory range\r
  //\r
  Status = SearchGcdMemorySpaces (\r
             MemorySpaceMap,\r
             NumberOfDescriptors,\r
             BaseAddress,\r
             Length,\r
             &StartIndex,\r
             &EndIndex\r
             );\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  //\r
  // Go through all related descriptors and set attributes accordingly\r
  //\r
  for (Index = StartIndex; Index <= EndIndex; Index++) {\r
    if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r
      continue;\r
    }\r
    //\r
    // Calculate the start and end address of the overlapping range\r
    //\r
    if (BaseAddress >= MemorySpaceMap[Index].BaseAddress) {\r
      RegionStart = BaseAddress;\r
    } else {\r
      RegionStart = MemorySpaceMap[Index].BaseAddress;\r
    }\r
    if ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length)) {\r
      RegionLength = BaseAddress + Length - RegionStart;\r
    } else {\r
      RegionLength = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - RegionStart;\r
    }\r
    //\r
    // Set memory attributes according to MTRR attribute and the original attribute of descriptor\r
    //\r
    gDS->SetMemorySpaceAttributes (\r
           RegionStart,\r
           RegionLength,\r
           (MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) | (MemorySpaceMap[Index].Capabilities & Attributes)\r
           );\r
  }\r
\r
  return EFI_SUCCESS;\r
}\r
\r
/**\r
  This function modifies the attributes for the memory region specified by BaseAddress and\r
  Length from their current attributes to the attributes specified by Attributes.\r
\r
  @param  This             The EFI_CPU_ARCH_PROTOCOL instance.\r
  @param  BaseAddress      The physical address that is the start address of a memory region.\r
  @param  Length           The size in bytes of the memory region.\r
  @param  Attributes       The bit mask of attributes to set for the memory region.\r
\r
  @retval EFI_SUCCESS           The attributes were set for the memory region.\r
  @retval EFI_ACCESS_DENIED     The attributes for the memory resource range specified by\r
                                BaseAddress and Length cannot be modified.\r
  @retval EFI_INVALID_PARAMETER Length is zero.\r
  @retval EFI_OUT_OF_RESOURCES  There are not enough system resources to modify the attributes of\r
                                the memory resource range.\r
  @retval EFI_UNSUPPORTED       The processor does not support one or more bytes of the memory\r
                                resource range specified by BaseAddress and Length.\r
                                The bit mask of attributes is not support for the memory resource\r
                                range specified by BaseAddress and Length.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
CpuSetMemoryAttributes (\r
  IN EFI_CPU_ARCH_PROTOCOL    *This,\r
  IN EFI_PHYSICAL_ADDRESS      BaseAddress,\r
  IN UINT64                    Length,\r
  IN UINT64                    EfiAttributes\r
  )\r
{\r
  EFI_STATUS  Status;\r
  UINTN       ArmAttributes;\r
  UINTN       RegionBaseAddress;\r
  UINTN       RegionLength;\r
  UINTN       RegionArmAttributes;\r
\r
  if ((BaseAddress & (SIZE_4KB - 1)) != 0) {\r
    // Minimum granularity is SIZE_4KB (4KB on ARM)\r
    DEBUG ((EFI_D_PAGE, "CpuSetMemoryAttributes(%lx, %lx, %lx): Minimum ganularity is SIZE_4KB\n", BaseAddress, Length, EfiAttributes));\r
    return EFI_UNSUPPORTED;\r
  }\r
\r
  // Convert the 'Attribute' into ARM Attribute\r
  ArmAttributes = EfiAttributeToArmAttribute (EfiAttributes);\r
\r
  // Get the region starting from 'BaseAddress' and its 'Attribute'\r
  RegionBaseAddress = BaseAddress;\r
  Status = GetMemoryRegion (&RegionBaseAddress, &RegionLength, &RegionArmAttributes);\r
\r
  // Data & Instruction Caches are flushed when we set new memory attributes.\r
  // So, we only set the attributes if the new region is different.\r
  if (EFI_ERROR (Status) || (RegionArmAttributes != ArmAttributes) ||\r
      ((BaseAddress + Length) > (RegionBaseAddress + RegionLength)))\r
  {\r
    return SetMemoryAttributes (BaseAddress, Length, EfiAttributes, 0);\r
  } else {\r
    return EFI_SUCCESS;\r
  }\r
}\r
\r
EFI_STATUS\r
EFIAPI\r
CpuConvertPagesToUncachedVirtualAddress (\r
  IN  VIRTUAL_UNCACHED_PAGES_PROTOCOL  *This,\r
  IN  EFI_PHYSICAL_ADDRESS              Address,\r
  IN  UINTN                             Length,\r
  IN  EFI_PHYSICAL_ADDRESS              VirtualMask,\r
  OUT UINT64                           *Attributes     OPTIONAL\r
  )\r
{\r
  EFI_STATUS                      Status;\r
  EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r
\r
  if (Attributes != NULL) {\r
    Status = gDS->GetMemorySpaceDescriptor (Address, &GcdDescriptor);\r
    if (!EFI_ERROR (Status)) {\r
      *Attributes = GcdDescriptor.Attributes;\r
    }\r
  }\r
\r
  //\r
  // Make this address range page fault if accessed. If it is a DMA buffer than this would\r
  // be the PCI address. Code should always use the CPU address, and we will or in VirtualMask\r
  // to that address.\r
  //\r
  Status = SetMemoryAttributes (Address, Length, EFI_MEMORY_WP, 0);\r
  if (!EFI_ERROR (Status)) {\r
    Status = SetMemoryAttributes (Address | VirtualMask, Length, EFI_MEMORY_UC, VirtualMask);\r
  }\r
\r
  DEBUG ((DEBUG_INFO | DEBUG_LOAD, "CpuConvertPagesToUncachedVirtualAddress()\n    Unmapped 0x%08lx Mapped 0x%08lx 0x%x bytes\n", Address, Address | VirtualMask, Length));\r
\r
  return Status;\r
}\r
\r
\r
EFI_STATUS\r
EFIAPI\r
CpuReconvertPages (\r
  IN  VIRTUAL_UNCACHED_PAGES_PROTOCOL  *This,\r
  IN  EFI_PHYSICAL_ADDRESS              Address,\r
  IN  UINTN                             Length,\r
  IN  EFI_PHYSICAL_ADDRESS              VirtualMask,\r
  IN  UINT64                            Attributes\r
  )\r
{\r
  EFI_STATUS      Status;\r
\r
  DEBUG ((DEBUG_INFO | DEBUG_LOAD, "CpuReconvertPages(%lx, %x, %lx, %lx)\n", Address, Length, VirtualMask, Attributes));\r
\r
  //\r
  // Unmap the aliased Address\r
  //\r
  Status = SetMemoryAttributes (Address | VirtualMask, Length, EFI_MEMORY_WP, 0);\r
  if (!EFI_ERROR (Status)) {\r
    //\r
    // Restore atttributes\r
    //\r
    Status = SetMemoryAttributes (Address, Length, Attributes, 0);\r
  }\r
\r
  return Status;\r
}\r
\r
\r
VIRTUAL_UNCACHED_PAGES_PROTOCOL  gVirtualUncachedPages = {\r
  CpuConvertPagesToUncachedVirtualAddress,\r
  CpuReconvertPages\r
};\r
Commit	Line	Data
591fb378 OM	1	/** @file\r
	2	*\r
	3	* Copyright (c) 2013, ARM Limited. All rights reserved.\r
	4	*\r
	5	* This program and the accompanying materials\r
	6	* are licensed and made available under the terms and conditions of the BSD License\r
	7	* which accompanies this distribution. The full text of the license may be found at\r
	8	* http://opensource.org/licenses/bsd-license.php\r
	9	*\r
	10	* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
	11	* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
	12	*\r
	13	**/\r
	14	\r
	15	#include "CpuDxe.h"\r
	16	\r
	17	/**\r
	18	Searches memory descriptors covered by given memory range.\r
	19	\r
	20	This function searches into the Gcd Memory Space for descriptors\r
	21	(from StartIndex to EndIndex) that contains the memory range\r
	22	specified by BaseAddress and Length.\r
	23	\r
	24	@param MemorySpaceMap Gcd Memory Space Map as array.\r
	25	@param NumberOfDescriptors Number of descriptors in map.\r
	26	@param BaseAddress BaseAddress for the requested range.\r
	27	@param Length Length for the requested range.\r
	28	@param StartIndex Start index into the Gcd Memory Space Map.\r
	29	@param EndIndex End index into the Gcd Memory Space Map.\r
	30	\r
	31	@retval EFI_SUCCESS Search successfully.\r
	32	@retval EFI_NOT_FOUND The requested descriptors does not exist.\r
	33	\r
	34	**/\r
	35	EFI_STATUS\r
	36	SearchGcdMemorySpaces (\r
	37	IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r
	38	IN UINTN NumberOfDescriptors,\r
	39	IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
	40	IN UINT64 Length,\r
	41	OUT UINTN *StartIndex,\r
	42	OUT UINTN *EndIndex\r
	43	)\r
	44	{\r
	45	UINTN Index;\r
	46	\r
	47	*StartIndex = 0;\r
	48	*EndIndex = 0;\r
	49	for (Index = 0; Index < NumberOfDescriptors; Index++) {\r
	50	if ((BaseAddress >= MemorySpaceMap[Index].BaseAddress) &&\r
	51	(BaseAddress < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r
	52	*StartIndex = Index;\r
	53	}\r
	54	if (((BaseAddress + Length - 1) >= MemorySpaceMap[Index].BaseAddress) &&\r
	55	((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length))) {\r
	56	*EndIndex = Index;\r
	57	return EFI_SUCCESS;\r
	58	}\r
	59	}\r
	60	return EFI_NOT_FOUND;\r
	61	}\r
	62	\r
	63	\r
	64	/**\r
65	Sets the attributes for a specified range in Gcd Memory Space Map.\r
66	\r
67	This function sets the attributes for a specified range in\r
68	Gcd Memory Space Map.\r
69	\r
70	@param MemorySpaceMap Gcd Memory Space Map as array\r
71	@param NumberOfDescriptors Number of descriptors in map\r
72	@param BaseAddress BaseAddress for the range\r
73	@param Length Length for the range\r
74	@param Attributes Attributes to set\r
75	\r
76	@retval EFI_SUCCESS Memory attributes set successfully\r
77	@retval EFI_NOT_FOUND The specified range does not exist in Gcd Memory Space\r
78	\r
79	**/\r
80	EFI_STATUS\r
81	SetGcdMemorySpaceAttributes (\r
82	IN EFI_GCD_MEMORY_SPACE_DESCRIPTOR *MemorySpaceMap,\r
83	IN UINTN NumberOfDescriptors,\r
84	IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
85	IN UINT64 Length,\r
86	IN UINT64 Attributes\r
87	)\r
88	{\r
89	EFI_STATUS Status;\r
90	UINTN Index;\r
91	UINTN StartIndex;\r
92	UINTN EndIndex;\r
93	EFI_PHYSICAL_ADDRESS RegionStart;\r
94	UINT64 RegionLength;\r
95	\r
96	DEBUG ((DEBUG_GCD, "SetGcdMemorySpaceAttributes[0x%lX; 0x%lX] = 0x%lX\n",\r
97	BaseAddress, BaseAddress + Length, Attributes));\r
98	\r
047c0cbb OM	99	// We do not support a smaller granularity than 4KB on ARM Architecture\r
	100	if ((Length & EFI_PAGE_MASK) != 0) {\r
	101	DEBUG ((DEBUG_WARN,\r
	102	"Warning: We do not support smaller granularity than 4KB on ARM Architecture (passed length: 0x%lX).\n",\r
	103	Length));\r
	104	}\r
	105	\r
591fb378 OM	106	//\r
	107	// Get all memory descriptors covered by the memory range\r
	108	//\r
	109	Status = SearchGcdMemorySpaces (\r
	110	MemorySpaceMap,\r
	111	NumberOfDescriptors,\r
	112	BaseAddress,\r
	113	Length,\r
	114	&StartIndex,\r
	115	&EndIndex\r
	116	);\r
	117	if (EFI_ERROR (Status)) {\r
	118	return Status;\r
	119	}\r
	120	\r
	121	//\r
	122	// Go through all related descriptors and set attributes accordingly\r
	123	//\r
	124	for (Index = StartIndex; Index <= EndIndex; Index++) {\r
	125	if (MemorySpaceMap[Index].GcdMemoryType == EfiGcdMemoryTypeNonExistent) {\r
	126	continue;\r
	127	}\r
	128	//\r
	129	// Calculate the start and end address of the overlapping range\r
	130	//\r
	131	if (BaseAddress >= MemorySpaceMap[Index].BaseAddress) {\r
	132	RegionStart = BaseAddress;\r
	133	} else {\r
	134	RegionStart = MemorySpaceMap[Index].BaseAddress;\r
	135	}\r
	136	if ((BaseAddress + Length - 1) < (MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length)) {\r
	137	RegionLength = BaseAddress + Length - RegionStart;\r
	138	} else {\r
	139	RegionLength = MemorySpaceMap[Index].BaseAddress + MemorySpaceMap[Index].Length - RegionStart;\r
	140	}\r
	141	//\r
	142	// Set memory attributes according to MTRR attribute and the original attribute of descriptor\r
	143	//\r
	144	gDS->SetMemorySpaceAttributes (\r
	145	RegionStart,\r
	146	RegionLength,\r
	147	(MemorySpaceMap[Index].Attributes & ~EFI_MEMORY_CACHETYPE_MASK) \| (MemorySpaceMap[Index].Capabilities & Attributes)\r
	148	);\r
	149	}\r
	150	\r
	151	return EFI_SUCCESS;\r
	152	}\r
	153	\r
	154	/**\r
	155	This function modifies the attributes for the memory region specified by BaseAddress and\r
	156	Length from their current attributes to the attributes specified by Attributes.\r
	157	\r
	158	@param This The EFI_CPU_ARCH_PROTOCOL instance.\r
	159	@param BaseAddress The physical address that is the start address of a memory region.\r
	160	@param Length The size in bytes of the memory region.\r
	161	@param Attributes The bit mask of attributes to set for the memory region.\r
	162	\r
	163	@retval EFI_SUCCESS The attributes were set for the memory region.\r
	164	@retval EFI_ACCESS_DENIED The attributes for the memory resource range specified by\r
	165	BaseAddress and Length cannot be modified.\r
	166	@retval EFI_INVALID_PARAMETER Length is zero.\r
	167	@retval EFI_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of\r
	168	the memory resource range.\r
	169	@retval EFI_UNSUPPORTED The processor does not support one or more bytes of the memory\r
170	resource range specified by BaseAddress and Length.\r
171	The bit mask of attributes is not support for the memory resource\r
172	range specified by BaseAddress and Length.\r
173	\r
174	**/\r
175	EFI_STATUS\r
176	EFIAPI\r
177	CpuSetMemoryAttributes (\r
178	IN EFI_CPU_ARCH_PROTOCOL *This,\r
179	IN EFI_PHYSICAL_ADDRESS BaseAddress,\r
180	IN UINT64 Length,\r
2e969d2e	181	IN UINT64 EfiAttributes\r
591fb378 OM	182	)\r
591fb378 OM	183	{\r
2e969d2e OM	184	EFI_STATUS Status;\r
	185	UINTN ArmAttributes;\r
	186	UINTN RegionBaseAddress;\r
	187	UINTN RegionLength;\r
	188	UINTN RegionArmAttributes;\r
591fb378 OM	189	\r
	190	if ((BaseAddress & (SIZE_4KB - 1)) != 0) {\r
	191	// Minimum granularity is SIZE_4KB (4KB on ARM)\r
2e969d2e	192	DEBUG ((EFI_D_PAGE, "CpuSetMemoryAttributes(%lx, %lx, %lx): Minimum ganularity is SIZE_4KB\n", BaseAddress, Length, EfiAttributes));\r
591fb378 OM	193	return EFI_UNSUPPORTED;\r
	194	}\r
	195	\r
2e969d2e OM	196	// Convert the 'Attribute' into ARM Attribute\r
	197	ArmAttributes = EfiAttributeToArmAttribute (EfiAttributes);\r
	198	\r
	199	// Get the region starting from 'BaseAddress' and its 'Attribute'\r
	200	RegionBaseAddress = BaseAddress;\r
	201	Status = GetMemoryRegion (&RegionBaseAddress, &RegionLength, &RegionArmAttributes);\r
	202	\r
	203	// Data & Instruction Caches are flushed when we set new memory attributes.\r
	204	// So, we only set the attributes if the new region is different.\r
	205	if (EFI_ERROR (Status) \|\| (RegionArmAttributes != ArmAttributes) \|\|\r
	206	((BaseAddress + Length) > (RegionBaseAddress + RegionLength)))\r
	207	{\r
	208	return SetMemoryAttributes (BaseAddress, Length, EfiAttributes, 0);\r
	209	} else {\r
	210	return EFI_SUCCESS;\r
	211	}\r
591fb378 OM	212	}\r
	213	\r
	214	EFI_STATUS\r
	215	EFIAPI\r
	216	CpuConvertPagesToUncachedVirtualAddress (\r
	217	IN VIRTUAL_UNCACHED_PAGES_PROTOCOL *This,\r
	218	IN EFI_PHYSICAL_ADDRESS Address,\r
	219	IN UINTN Length,\r
	220	IN EFI_PHYSICAL_ADDRESS VirtualMask,\r
	221	OUT UINT64 *Attributes OPTIONAL\r
	222	)\r
	223	{\r
	224	EFI_STATUS Status;\r
	225	EFI_GCD_MEMORY_SPACE_DESCRIPTOR GcdDescriptor;\r
	226	\r
	227	if (Attributes != NULL) {\r
	228	Status = gDS->GetMemorySpaceDescriptor (Address, &GcdDescriptor);\r
	229	if (!EFI_ERROR (Status)) {\r
	230	*Attributes = GcdDescriptor.Attributes;\r
	231	}\r
	232	}\r
	233	\r
	234	//\r
	235	// Make this address range page fault if accessed. If it is a DMA buffer than this would\r
	236	// be the PCI address. Code should always use the CPU address, and we will or in VirtualMask\r
	237	// to that address.\r
	238	//\r
	239	Status = SetMemoryAttributes (Address, Length, EFI_MEMORY_WP, 0);\r
	240	if (!EFI_ERROR (Status)) {\r
	241	Status = SetMemoryAttributes (Address \| VirtualMask, Length, EFI_MEMORY_UC, VirtualMask);\r
	242	}\r
	243	\r
	244	DEBUG ((DEBUG_INFO \| DEBUG_LOAD, "CpuConvertPagesToUncachedVirtualAddress()\n Unmapped 0x%08lx Mapped 0x%08lx 0x%x bytes\n", Address, Address \| VirtualMask, Length));\r
	245	\r
	246	return Status;\r
	247	}\r
	248	\r
	249	\r
	250	EFI_STATUS\r
	251	EFIAPI\r
	252	CpuReconvertPages (\r
	253	IN VIRTUAL_UNCACHED_PAGES_PROTOCOL *This,\r
	254	IN EFI_PHYSICAL_ADDRESS Address,\r
	255	IN UINTN Length,\r
	256	IN EFI_PHYSICAL_ADDRESS VirtualMask,\r
	257	IN UINT64 Attributes\r
	258	)\r
	259	{\r
	260	EFI_STATUS Status;\r
	261	\r
	262	DEBUG ((DEBUG_INFO \| DEBUG_LOAD, "CpuReconvertPages(%lx, %x, %lx, %lx)\n", Address, Length, VirtualMask, Attributes));\r
	263	\r
	264	//\r
	265	// Unmap the aliased Address\r
	266	//\r
	267	Status = SetMemoryAttributes (Address \| VirtualMask, Length, EFI_MEMORY_WP, 0);\r
	268	if (!EFI_ERROR (Status)) {\r
	269	//\r
	270	// Restore atttributes\r
	271	//\r
	272	Status = SetMemoryAttributes (Address, Length, Attributes, 0);\r
	273	}\r
	274	\r
	275	return Status;\r
276	}\r
277	\r
278	\r
279	VIRTUAL_UNCACHED_PAGES_PROTOCOL gVirtualUncachedPages = {\r
280	CpuConvertPagesToUncachedVirtualAddress,\r
281	CpuReconvertPages\r
282	};\r