[mirror_edk2.git] / MdeModulePkg / Core / Dxe / FwVol / FwVolRead.c

/** @file\r
  Implements functions to read firmware file\r
\r
Copyright (c) 2006 - 2009, Intel Corporation. <BR>\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 "DxeMain.h"\r
#include "FwVolDriver.h"\r
\r
/**\r
Required Alignment             Alignment Value in FFS         Alignment Value in\r
(bytes)                        Attributes Field               Firmware Volume Interfaces\r
1                                    0                                     0\r
2                                    0                                     1\r
4                                    0                                     2\r
8                                    0                                     3\r
16                                   1                                     4\r
128                                  2                                     7\r
512                                  3                                     9\r
1 KB                                 4                                     10\r
4 KB                                 5                                     12\r
32 KB                                6                                     15\r
64 KB                                7                                     16\r
**/\r
UINT8 mFvAttributes[] = {0, 4, 7, 9, 10, 12, 15, 16};\r
\r
\r
\r
/**\r
  Convert the FFS File Attributes to FV File Attributes\r
\r
  @param  FfsAttributes              The attributes of UINT8 type.\r
\r
  @return The attributes of EFI_FV_FILE_ATTRIBUTES\r
\r
**/\r
EFI_FV_FILE_ATTRIBUTES\r
FfsAttributes2FvFileAttributes (\r
  IN EFI_FFS_FILE_ATTRIBUTES FfsAttributes\r
  )\r
{\r
  FfsAttributes = (EFI_FFS_FILE_ATTRIBUTES)((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3);\r
  ASSERT (FfsAttributes < 8);\r
\r
  return (EFI_FV_FILE_ATTRIBUTES) mFvAttributes[FfsAttributes];\r
}\r
\r
\r
\r
/**\r
  Given the input key, search for the next matching file in the volume.\r
\r
  @param  This                       Indicates the calling context.\r
  @param  Key                        Key is a pointer to a caller allocated\r
                                     buffer that contains implementation specific\r
                                     data that is used to track where to begin\r
                                     the search for the next file. The size of\r
                                     the buffer must be at least This->KeySize\r
                                     bytes long. To reinitialize the search and\r
                                     begin from the beginning of the firmware\r
                                     volume, the entire buffer must be cleared to\r
                                     zero. Other than clearing the buffer to\r
                                     initiate a new search, the caller must not\r
                                     modify the data in the buffer between calls\r
                                     to GetNextFile().\r
  @param  FileType                   FileType is a pointer to a caller allocated\r
                                     EFI_FV_FILETYPE. The GetNextFile() API can\r
                                     filter it's search for files based on the\r
                                     value of *FileType input. A *FileType input\r
                                     of 0 causes GetNextFile() to search for\r
                                     files of all types.  If a file is found, the\r
                                     file's type is returned in *FileType.\r
                                     *FileType is not modified if no file is\r
                                     found.\r
  @param  NameGuid                   NameGuid is a pointer to a caller allocated\r
                                     EFI_GUID. If a file is found, the file's\r
                                     name is returned in *NameGuid.  *NameGuid is\r
                                     not modified if no file is found.\r
  @param  Attributes                 Attributes is a pointer to a caller\r
                                     allocated EFI_FV_FILE_ATTRIBUTES.  If a file\r
                                     is found, the file's attributes are returned\r
                                     in *Attributes. *Attributes is not modified\r
                                     if no file is found.\r
  @param  Size                       Size is a pointer to a caller allocated\r
                                     UINTN. If a file is found, the file's size\r
                                     is returned in *Size. *Size is not modified\r
                                     if no file is found.\r
\r
  @retval EFI_SUCCESS                Successfully find the file.\r
  @retval EFI_DEVICE_ERROR           Device error.\r
  @retval EFI_ACCESS_DENIED          Fv could not read.\r
  @retval EFI_NOT_FOUND              No matching file found.\r
  @retval EFI_INVALID_PARAMETER      Invalid parameter\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FvGetNextFile (\r
  IN CONST   EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r
  IN OUT     VOID                          *Key,\r
  IN OUT     EFI_FV_FILETYPE               *FileType,\r
  OUT        EFI_GUID                      *NameGuid,\r
  OUT        EFI_FV_FILE_ATTRIBUTES        *Attributes,\r
  OUT        UINTN                         *Size\r
  )\r
{\r
  EFI_STATUS                                  Status;\r
  FV_DEVICE                                   *FvDevice;\r
  EFI_FV_ATTRIBUTES                           FvAttributes;\r
  EFI_FFS_FILE_HEADER                         *FfsFileHeader;\r
  UINTN                                       *KeyValue;\r
  LIST_ENTRY                                  *Link;\r
  FFS_FILE_LIST_ENTRY                         *FfsFileEntry;\r
  UINTN                                       FileLength;\r
\r
  FvDevice = FV_DEVICE_FROM_THIS (This);\r
\r
  Status = FvGetVolumeAttributes (This, &FvAttributes);\r
  if (EFI_ERROR (Status)){\r
    return Status;\r
  }\r
\r
  //\r
  // Check if read operation is enabled\r
  //\r
  if ((FvAttributes & EFI_FV2_READ_STATUS) == 0) {\r
    return EFI_ACCESS_DENIED;\r
  }\r
\r
  if (*FileType > EFI_FV_FILETYPE_SMM_CORE) {\r
    //\r
    // File type needs to be in 0 - 0x0D\r
    //\r
    return EFI_NOT_FOUND;\r
  }\r
\r
  KeyValue = (UINTN *)Key;\r
  for (;;) {\r
    if (*KeyValue == 0) {\r
      //\r
      // Search for 1st matching file\r
      //\r
      Link = &FvDevice->FfsFileListHeader;\r
    } else {\r
      //\r
      // Key is pointer to FFsFileEntry, so get next one\r
      //\r
      Link = (LIST_ENTRY *)(*KeyValue);\r
    }\r
\r
    if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r
      //\r
      // Next is end of list so we did not find data\r
      //\r
      return EFI_NOT_FOUND;\r
    }\r
\r
    FfsFileEntry = (FFS_FILE_LIST_ENTRY *)Link->ForwardLink;\r
    FfsFileHeader = (EFI_FFS_FILE_HEADER *)FfsFileEntry->FfsHeader;\r
\r
    //\r
    // remember the key\r
    //\r
    *KeyValue = (UINTN)FfsFileEntry;\r
\r
    if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r
      //\r
      // we ignore pad files\r
      //\r
      continue;\r
    }\r
\r
    if (*FileType == EFI_FV_FILETYPE_ALL) {\r
      //\r
      // Process all file types so we have a match\r
      //\r
      break;\r
    }\r
\r
    if (*FileType == FfsFileHeader->Type) {\r
      //\r
      // Found a matching file type\r
      //\r
      break;\r
    }\r
\r
  }\r
\r
  //\r
  // Return FileType, NameGuid, and Attributes\r
  //\r
  *FileType = FfsFileHeader->Type;\r
  CopyGuid (NameGuid, &FfsFileHeader->Name);\r
  *Attributes = FfsAttributes2FvFileAttributes (FfsFileHeader->Attributes);\r
\r
  //\r
  // Read four bytes out of the 3 byte array and throw out extra data\r
  //\r
  FileLength = *(UINT32 *)&FfsFileHeader->Size[0] & 0x00FFFFFF;\r
\r
  //\r
  // we need to substract the header size\r
  //\r
  *Size = FileLength - sizeof(EFI_FFS_FILE_HEADER);\r
\r
  return EFI_SUCCESS;\r
}\r
\r
\r
\r
/**\r
  Locates a file in the firmware volume and\r
  copies it to the supplied buffer.\r
\r
  @param  This                       Indicates the calling context.\r
  @param  NameGuid                   Pointer to an EFI_GUID, which is the\r
                                     filename.\r
  @param  Buffer                     Buffer is a pointer to pointer to a buffer\r
                                     in which the file or section contents or are\r
                                     returned.\r
  @param  BufferSize                 BufferSize is a pointer to caller allocated\r
                                     UINTN. On input *BufferSize indicates the\r
                                     size in bytes of the memory region pointed\r
                                     to by Buffer. On output, *BufferSize\r
                                     contains the number of bytes required to\r
                                     read the file.\r
  @param  FoundType                  FoundType is a pointer to a caller allocated\r
                                     EFI_FV_FILETYPE that on successful return\r
                                     from Read() contains the type of file read.\r
                                     This output reflects the file type\r
                                     irrespective of the value of the SectionType\r
                                     input.\r
  @param  FileAttributes             FileAttributes is a pointer to a caller\r
                                     allocated EFI_FV_FILE_ATTRIBUTES.  On\r
                                     successful return from Read(),\r
                                     *FileAttributes contains the attributes of\r
                                     the file read.\r
  @param  AuthenticationStatus       AuthenticationStatus is a pointer to a\r
                                     caller allocated UINTN in which the\r
                                     authentication status is returned.\r
\r
  @retval EFI_SUCCESS                Successfully read to memory buffer.\r
  @retval EFI_WARN_BUFFER_TOO_SMALL  Buffer too small.\r
  @retval EFI_NOT_FOUND              Not found.\r
  @retval EFI_DEVICE_ERROR           Device error.\r
  @retval EFI_ACCESS_DENIED          Could not read.\r
  @retval EFI_INVALID_PARAMETER      Invalid parameter.\r
  @retval EFI_OUT_OF_RESOURCES       Not enough buffer to be allocated.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FvReadFile (\r
  IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r
  IN CONST EFI_GUID                      *NameGuid,\r
  IN OUT   VOID                          **Buffer,\r
  IN OUT   UINTN                         *BufferSize,\r
  OUT      EFI_FV_FILETYPE               *FoundType,\r
  OUT      EFI_FV_FILE_ATTRIBUTES        *FileAttributes,\r
  OUT      UINT32                        *AuthenticationStatus\r
  )\r
{\r
  EFI_STATUS                        Status;\r
  FV_DEVICE                         *FvDevice;\r
  EFI_GUID                          SearchNameGuid;\r
  EFI_FV_FILETYPE                   LocalFoundType;\r
  EFI_FV_FILE_ATTRIBUTES            LocalAttributes;\r
  UINTN                             FileSize;\r
  UINT8                             *SrcPtr;\r
  EFI_FFS_FILE_HEADER               *FfsHeader;\r
  UINTN                             InputBufferSize;\r
\r
  if (NameGuid == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  FvDevice = FV_DEVICE_FROM_THIS (This);\r
\r
\r
  //\r
  // Keep looking until we find the matching NameGuid.\r
  // The Key is really an FfsFileEntry\r
  //\r
  FvDevice->LastKey = 0;\r
  do {\r
    LocalFoundType = 0;\r
    Status = FvGetNextFile (\r
              This,\r
              &FvDevice->LastKey,\r
              &LocalFoundType,\r
              &SearchNameGuid,\r
              &LocalAttributes,\r
              &FileSize\r
              );\r
    if (EFI_ERROR (Status)) {\r
      return EFI_NOT_FOUND;\r
    }\r
  } while (!CompareGuid (&SearchNameGuid, NameGuid));\r
\r
  //\r
  // Get a pointer to the header\r
  //\r
  FfsHeader = FvDevice->LastKey->FfsHeader;\r
\r
  //\r
  // Remember callers buffer size\r
  //\r
  InputBufferSize = *BufferSize;\r
\r
  //\r
  // Calculate return values\r
  //\r
  *FoundType = FfsHeader->Type;\r
  *FileAttributes = FfsAttributes2FvFileAttributes (FfsHeader->Attributes);\r
  *AuthenticationStatus = 0;\r
  *BufferSize = FileSize;\r
\r
  if (Buffer == NULL) {\r
    //\r
    // If Buffer is NULL, we only want to get the information colected so far\r
    //\r
    return EFI_SUCCESS;\r
  }\r
\r
  //\r
  // Skip over file header\r
  //\r
  SrcPtr = ((UINT8 *)FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);\r
\r
  Status = EFI_SUCCESS;\r
  if (*Buffer == NULL) {\r
    //\r
    // Caller passed in a pointer so allocate buffer for them\r
    //\r
    *Buffer = AllocatePool (FileSize);\r
    if (*Buffer == NULL) {\r
      return EFI_OUT_OF_RESOURCES;\r
    }\r
  } else if (FileSize > InputBufferSize) {\r
    //\r
    // Callers buffer was not big enough\r
    //\r
    Status = EFI_WARN_BUFFER_TOO_SMALL;\r
    FileSize = InputBufferSize;\r
  }\r
\r
  //\r
  // Copy data into callers buffer\r
  //\r
  CopyMem (*Buffer, SrcPtr, FileSize);\r
\r
  return Status;\r
}\r
\r
\r
\r
/**\r
  Locates a section in a given FFS File and\r
  copies it to the supplied buffer (not including section header).\r
\r
  @param  This                       Indicates the calling context.\r
  @param  NameGuid                   Pointer to an EFI_GUID, which is the\r
                                     filename.\r
  @param  SectionType                Indicates the section type to return.\r
  @param  SectionInstance            Indicates which instance of sections with a\r
                                     type of SectionType to return.\r
  @param  Buffer                     Buffer is a pointer to pointer to a buffer\r
                                     in which the file or section contents or are\r
                                     returned.\r
  @param  BufferSize                 BufferSize is a pointer to caller allocated\r
                                     UINTN.\r
  @param  AuthenticationStatus       AuthenticationStatus is a pointer to a\r
                                     caller allocated UINT32 in which the\r
                                     authentication status is returned.\r
\r
  @retval EFI_SUCCESS                Successfully read the file section into\r
                                     buffer.\r
  @retval EFI_WARN_BUFFER_TOO_SMALL  Buffer too small.\r
  @retval EFI_NOT_FOUND              Section not found.\r
  @retval EFI_DEVICE_ERROR           Device error.\r
  @retval EFI_ACCESS_DENIED          Could not read.\r
  @retval EFI_INVALID_PARAMETER      Invalid parameter.\r
\r
**/\r
EFI_STATUS\r
EFIAPI\r
FvReadFileSection (\r
  IN CONST  EFI_FIRMWARE_VOLUME2_PROTOCOL  *This,\r
  IN CONST  EFI_GUID                       *NameGuid,\r
  IN        EFI_SECTION_TYPE               SectionType,\r
  IN        UINTN                          SectionInstance,\r
  IN OUT    VOID                           **Buffer,\r
  IN OUT    UINTN                          *BufferSize,\r
  OUT       UINT32                         *AuthenticationStatus\r
  )\r
{\r
  EFI_STATUS                        Status;\r
  FV_DEVICE                         *FvDevice;\r
  EFI_FV_FILETYPE                   FileType;\r
  EFI_FV_FILE_ATTRIBUTES            FileAttributes;\r
  UINTN                             FileSize;\r
  UINT8                             *FileBuffer;\r
  FFS_FILE_LIST_ENTRY               *FfsEntry;\r
\r
  if (NameGuid == NULL || Buffer == NULL) {\r
    return EFI_INVALID_PARAMETER;\r
  }\r
\r
  FvDevice = FV_DEVICE_FROM_THIS (This);\r
\r
  //\r
  // Read the whole file into buffer\r
  //\r
  FileBuffer = NULL;\r
  Status = FvReadFile (\r
            This,\r
            NameGuid,\r
            (VOID **)&FileBuffer,\r
            &FileSize,\r
            &FileType,\r
            &FileAttributes,\r
            AuthenticationStatus\r
            );\r
  //\r
  // Get the last key used by our call to FvReadFile as it is the FfsEntry for this file.\r
  //\r
  FfsEntry = (FFS_FILE_LIST_ENTRY *) FvDevice->LastKey;\r
\r
  if (EFI_ERROR (Status)) {\r
    return Status;\r
  }\r
\r
  //\r
  // Check to see that the file actually HAS sections before we go any further.\r
  //\r
  if (FileType == EFI_FV_FILETYPE_RAW) {\r
    Status = EFI_NOT_FOUND;\r
    goto Done;\r
  }\r
\r
  //\r
  // Use FfsEntry to cache Section Extraction Protocol Inforomation\r
  //\r
  if (FfsEntry->StreamHandle == 0) {\r
    Status = OpenSectionStream (\r
               FileSize,\r
               FileBuffer,\r
               &FfsEntry->StreamHandle\r
               );\r
    if (EFI_ERROR (Status)) {\r
      goto Done;\r
    }\r
  }\r
\r
  //\r
  // If SectionType == 0 We need the whole section stream\r
  //\r
  Status = GetSection (\r
             FfsEntry->StreamHandle,\r
             (SectionType == 0) ? NULL : &SectionType,\r
             NULL,\r
             (SectionType == 0) ? 0 : SectionInstance,\r
             Buffer,\r
             BufferSize,\r
             AuthenticationStatus\r
             );\r
\r
  //\r
  // Close of stream defered to close of FfsHeader list to allow SEP to cache data\r
  //\r
\r
Done:\r
  CoreFreePool (FileBuffer);\r
\r
  return Status;\r
}\r
\r
\r
Commit	Line	Data
	1	/** @file\r
	2	Implements functions to read firmware file\r
	3	\r
	4	Copyright (c) 2006 - 2009, Intel Corporation. <BR>\r
	5	All rights reserved. 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 "DxeMain.h"\r
	16	#include "FwVolDriver.h"\r
	17	\r
	18	/**\r
	19	Required Alignment Alignment Value in FFS Alignment Value in\r
	20	(bytes) Attributes Field Firmware Volume Interfaces\r
	21	1 0 0\r
	22	2 0 1\r
	23	4 0 2\r
	24	8 0 3\r
	25	16 1 4\r
	26	128 2 7\r
	27	512 3 9\r
	28	1 KB 4 10\r
	29	4 KB 5 12\r
	30	32 KB 6 15\r
	31	64 KB 7 16\r
	32	**/\r
	33	UINT8 mFvAttributes[] = {0, 4, 7, 9, 10, 12, 15, 16};\r
	34	\r
	35	\r
	36	\r
	37	/**\r
	38	Convert the FFS File Attributes to FV File Attributes\r
	39	\r
	40	@param FfsAttributes The attributes of UINT8 type.\r
	41	\r
	42	@return The attributes of EFI_FV_FILE_ATTRIBUTES\r
	43	\r
	44	**/\r
	45	EFI_FV_FILE_ATTRIBUTES\r
	46	FfsAttributes2FvFileAttributes (\r
	47	IN EFI_FFS_FILE_ATTRIBUTES FfsAttributes\r
	48	)\r
	49	{\r
	50	FfsAttributes = (EFI_FFS_FILE_ATTRIBUTES)((FfsAttributes & FFS_ATTRIB_DATA_ALIGNMENT) >> 3);\r
	51	ASSERT (FfsAttributes < 8);\r
	52	\r
	53	return (EFI_FV_FILE_ATTRIBUTES) mFvAttributes[FfsAttributes];\r
	54	}\r
	55	\r
	56	\r
	57	\r
	58	/**\r
	59	Given the input key, search for the next matching file in the volume.\r
	60	\r
	61	@param This Indicates the calling context.\r
	62	@param Key Key is a pointer to a caller allocated\r
	63	buffer that contains implementation specific\r
	64	data that is used to track where to begin\r
	65	the search for the next file. The size of\r
	66	the buffer must be at least This->KeySize\r
	67	bytes long. To reinitialize the search and\r
	68	begin from the beginning of the firmware\r
	69	volume, the entire buffer must be cleared to\r
	70	zero. Other than clearing the buffer to\r
	71	initiate a new search, the caller must not\r
	72	modify the data in the buffer between calls\r
	73	to GetNextFile().\r
	74	@param FileType FileType is a pointer to a caller allocated\r
	75	EFI_FV_FILETYPE. The GetNextFile() API can\r
	76	filter it's search for files based on the\r
	77	value of FileType input. A FileType input\r
	78	of 0 causes GetNextFile() to search for\r
	79	files of all types. If a file is found, the\r
	80	file's type is returned in *FileType.\r
	81	*FileType is not modified if no file is\r
	82	found.\r
	83	@param NameGuid NameGuid is a pointer to a caller allocated\r
	84	EFI_GUID. If a file is found, the file's\r
	85	name is returned in NameGuid. NameGuid is\r
	86	not modified if no file is found.\r
	87	@param Attributes Attributes is a pointer to a caller\r
	88	allocated EFI_FV_FILE_ATTRIBUTES. If a file\r
	89	is found, the file's attributes are returned\r
	90	in Attributes. Attributes is not modified\r
	91	if no file is found.\r
	92	@param Size Size is a pointer to a caller allocated\r
	93	UINTN. If a file is found, the file's size\r
	94	is returned in Size. Size is not modified\r
	95	if no file is found.\r
	96	\r
	97	@retval EFI_SUCCESS Successfully find the file.\r
	98	@retval EFI_DEVICE_ERROR Device error.\r
	99	@retval EFI_ACCESS_DENIED Fv could not read.\r
	100	@retval EFI_NOT_FOUND No matching file found.\r
	101	@retval EFI_INVALID_PARAMETER Invalid parameter\r
	102	\r
	103	**/\r
	104	EFI_STATUS\r
	105	EFIAPI\r
	106	FvGetNextFile (\r
	107	IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r
	108	IN OUT VOID *Key,\r
	109	IN OUT EFI_FV_FILETYPE *FileType,\r
	110	OUT EFI_GUID *NameGuid,\r
	111	OUT EFI_FV_FILE_ATTRIBUTES *Attributes,\r
	112	OUT UINTN *Size\r
	113	)\r
	114	{\r
	115	EFI_STATUS Status;\r
	116	FV_DEVICE *FvDevice;\r
	117	EFI_FV_ATTRIBUTES FvAttributes;\r
	118	EFI_FFS_FILE_HEADER *FfsFileHeader;\r
	119	UINTN *KeyValue;\r
	120	LIST_ENTRY *Link;\r
	121	FFS_FILE_LIST_ENTRY *FfsFileEntry;\r
	122	UINTN FileLength;\r
	123	\r
	124	FvDevice = FV_DEVICE_FROM_THIS (This);\r
	125	\r
	126	Status = FvGetVolumeAttributes (This, &FvAttributes);\r
	127	if (EFI_ERROR (Status)){\r
	128	return Status;\r
	129	}\r
	130	\r
	131	//\r
	132	// Check if read operation is enabled\r
	133	//\r
	134	if ((FvAttributes & EFI_FV2_READ_STATUS) == 0) {\r
	135	return EFI_ACCESS_DENIED;\r
	136	}\r
	137	\r
	138	if (*FileType > EFI_FV_FILETYPE_SMM_CORE) {\r
	139	//\r
	140	// File type needs to be in 0 - 0x0D\r
	141	//\r
	142	return EFI_NOT_FOUND;\r
	143	}\r
	144	\r
	145	KeyValue = (UINTN *)Key;\r
	146	for (;;) {\r
	147	if (*KeyValue == 0) {\r
	148	//\r
	149	// Search for 1st matching file\r
	150	//\r
	151	Link = &FvDevice->FfsFileListHeader;\r
	152	} else {\r
	153	//\r
	154	// Key is pointer to FFsFileEntry, so get next one\r
	155	//\r
	156	Link = (LIST_ENTRY )(KeyValue);\r
	157	}\r
	158	\r
	159	if (Link->ForwardLink == &FvDevice->FfsFileListHeader) {\r
	160	//\r
	161	// Next is end of list so we did not find data\r
	162	//\r
	163	return EFI_NOT_FOUND;\r
	164	}\r
	165	\r
	166	FfsFileEntry = (FFS_FILE_LIST_ENTRY *)Link->ForwardLink;\r
	167	FfsFileHeader = (EFI_FFS_FILE_HEADER *)FfsFileEntry->FfsHeader;\r
	168	\r
	169	//\r
	170	// remember the key\r
	171	//\r
	172	*KeyValue = (UINTN)FfsFileEntry;\r
	173	\r
	174	if (FfsFileHeader->Type == EFI_FV_FILETYPE_FFS_PAD) {\r
	175	//\r
	176	// we ignore pad files\r
	177	//\r
	178	continue;\r
	179	}\r
	180	\r
	181	if (*FileType == EFI_FV_FILETYPE_ALL) {\r
	182	//\r
	183	// Process all file types so we have a match\r
	184	//\r
	185	break;\r
	186	}\r
	187	\r
	188	if (*FileType == FfsFileHeader->Type) {\r
	189	//\r
	190	// Found a matching file type\r
	191	//\r
	192	break;\r
	193	}\r
	194	\r
	195	}\r
	196	\r
	197	//\r
	198	// Return FileType, NameGuid, and Attributes\r
	199	//\r
	200	*FileType = FfsFileHeader->Type;\r
	201	CopyGuid (NameGuid, &FfsFileHeader->Name);\r
	202	*Attributes = FfsAttributes2FvFileAttributes (FfsFileHeader->Attributes);\r
	203	\r
	204	//\r
	205	// Read four bytes out of the 3 byte array and throw out extra data\r
	206	//\r
	207	FileLength = (UINT32 )&FfsFileHeader->Size[0] & 0x00FFFFFF;\r
	208	\r
	209	//\r
	210	// we need to substract the header size\r
	211	//\r
	212	*Size = FileLength - sizeof(EFI_FFS_FILE_HEADER);\r
	213	\r
	214	return EFI_SUCCESS;\r
	215	}\r
	216	\r
	217	\r
	218	\r
	219	/**\r
	220	Locates a file in the firmware volume and\r
	221	copies it to the supplied buffer.\r
	222	\r
	223	@param This Indicates the calling context.\r
	224	@param NameGuid Pointer to an EFI_GUID, which is the\r
	225	filename.\r
	226	@param Buffer Buffer is a pointer to pointer to a buffer\r
	227	in which the file or section contents or are\r
	228	returned.\r
	229	@param BufferSize BufferSize is a pointer to caller allocated\r
	230	UINTN. On input *BufferSize indicates the\r
	231	size in bytes of the memory region pointed\r
	232	to by Buffer. On output, *BufferSize\r
	233	contains the number of bytes required to\r
	234	read the file.\r
	235	@param FoundType FoundType is a pointer to a caller allocated\r
	236	EFI_FV_FILETYPE that on successful return\r
	237	from Read() contains the type of file read.\r
	238	This output reflects the file type\r
	239	irrespective of the value of the SectionType\r
	240	input.\r
	241	@param FileAttributes FileAttributes is a pointer to a caller\r
	242	allocated EFI_FV_FILE_ATTRIBUTES. On\r
	243	successful return from Read(),\r
	244	*FileAttributes contains the attributes of\r
	245	the file read.\r
	246	@param AuthenticationStatus AuthenticationStatus is a pointer to a\r
	247	caller allocated UINTN in which the\r
	248	authentication status is returned.\r
	249	\r
	250	@retval EFI_SUCCESS Successfully read to memory buffer.\r
	251	@retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r
	252	@retval EFI_NOT_FOUND Not found.\r
	253	@retval EFI_DEVICE_ERROR Device error.\r
	254	@retval EFI_ACCESS_DENIED Could not read.\r
	255	@retval EFI_INVALID_PARAMETER Invalid parameter.\r
	256	@retval EFI_OUT_OF_RESOURCES Not enough buffer to be allocated.\r
	257	\r
	258	**/\r
	259	EFI_STATUS\r
	260	EFIAPI\r
	261	FvReadFile (\r
	262	IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r
	263	IN CONST EFI_GUID *NameGuid,\r
	264	IN OUT VOID **Buffer,\r
	265	IN OUT UINTN *BufferSize,\r
	266	OUT EFI_FV_FILETYPE *FoundType,\r
	267	OUT EFI_FV_FILE_ATTRIBUTES *FileAttributes,\r
	268	OUT UINT32 *AuthenticationStatus\r
	269	)\r
	270	{\r
	271	EFI_STATUS Status;\r
	272	FV_DEVICE *FvDevice;\r
	273	EFI_GUID SearchNameGuid;\r
	274	EFI_FV_FILETYPE LocalFoundType;\r
	275	EFI_FV_FILE_ATTRIBUTES LocalAttributes;\r
	276	UINTN FileSize;\r
	277	UINT8 *SrcPtr;\r
	278	EFI_FFS_FILE_HEADER *FfsHeader;\r
	279	UINTN InputBufferSize;\r
	280	\r
	281	if (NameGuid == NULL) {\r
	282	return EFI_INVALID_PARAMETER;\r
	283	}\r
	284	\r
	285	FvDevice = FV_DEVICE_FROM_THIS (This);\r
	286	\r
	287	\r
	288	//\r
	289	// Keep looking until we find the matching NameGuid.\r
	290	// The Key is really an FfsFileEntry\r
	291	//\r
	292	FvDevice->LastKey = 0;\r
	293	do {\r
	294	LocalFoundType = 0;\r
	295	Status = FvGetNextFile (\r
	296	This,\r
	297	&FvDevice->LastKey,\r
	298	&LocalFoundType,\r
	299	&SearchNameGuid,\r
	300	&LocalAttributes,\r
	301	&FileSize\r
	302	);\r
	303	if (EFI_ERROR (Status)) {\r
	304	return EFI_NOT_FOUND;\r
	305	}\r
	306	} while (!CompareGuid (&SearchNameGuid, NameGuid));\r
	307	\r
	308	//\r
	309	// Get a pointer to the header\r
	310	//\r
	311	FfsHeader = FvDevice->LastKey->FfsHeader;\r
	312	\r
	313	//\r
	314	// Remember callers buffer size\r
	315	//\r
	316	InputBufferSize = *BufferSize;\r
	317	\r
	318	//\r
	319	// Calculate return values\r
	320	//\r
	321	*FoundType = FfsHeader->Type;\r
	322	*FileAttributes = FfsAttributes2FvFileAttributes (FfsHeader->Attributes);\r
	323	*AuthenticationStatus = 0;\r
	324	*BufferSize = FileSize;\r
	325	\r
	326	if (Buffer == NULL) {\r
	327	//\r
	328	// If Buffer is NULL, we only want to get the information colected so far\r
	329	//\r
	330	return EFI_SUCCESS;\r
	331	}\r
	332	\r
	333	//\r
	334	// Skip over file header\r
	335	//\r
	336	SrcPtr = ((UINT8 *)FfsHeader) + sizeof (EFI_FFS_FILE_HEADER);\r
	337	\r
	338	Status = EFI_SUCCESS;\r
	339	if (*Buffer == NULL) {\r
	340	//\r
	341	// Caller passed in a pointer so allocate buffer for them\r
	342	//\r
	343	*Buffer = AllocatePool (FileSize);\r
	344	if (*Buffer == NULL) {\r
	345	return EFI_OUT_OF_RESOURCES;\r
	346	}\r
	347	} else if (FileSize > InputBufferSize) {\r
	348	//\r
	349	// Callers buffer was not big enough\r
	350	//\r
	351	Status = EFI_WARN_BUFFER_TOO_SMALL;\r
	352	FileSize = InputBufferSize;\r
	353	}\r
	354	\r
	355	//\r
	356	// Copy data into callers buffer\r
	357	//\r
	358	CopyMem (*Buffer, SrcPtr, FileSize);\r
	359	\r
	360	return Status;\r
	361	}\r
	362	\r
	363	\r
	364	\r
	365	/**\r
	366	Locates a section in a given FFS File and\r
	367	copies it to the supplied buffer (not including section header).\r
	368	\r
	369	@param This Indicates the calling context.\r
	370	@param NameGuid Pointer to an EFI_GUID, which is the\r
	371	filename.\r
	372	@param SectionType Indicates the section type to return.\r
	373	@param SectionInstance Indicates which instance of sections with a\r
	374	type of SectionType to return.\r
	375	@param Buffer Buffer is a pointer to pointer to a buffer\r
	376	in which the file or section contents or are\r
	377	returned.\r
	378	@param BufferSize BufferSize is a pointer to caller allocated\r
	379	UINTN.\r
	380	@param AuthenticationStatus AuthenticationStatus is a pointer to a\r
	381	caller allocated UINT32 in which the\r
	382	authentication status is returned.\r
	383	\r
	384	@retval EFI_SUCCESS Successfully read the file section into\r
	385	buffer.\r
	386	@retval EFI_WARN_BUFFER_TOO_SMALL Buffer too small.\r
	387	@retval EFI_NOT_FOUND Section not found.\r
	388	@retval EFI_DEVICE_ERROR Device error.\r
	389	@retval EFI_ACCESS_DENIED Could not read.\r
	390	@retval EFI_INVALID_PARAMETER Invalid parameter.\r
	391	\r
	392	**/\r
	393	EFI_STATUS\r
	394	EFIAPI\r
	395	FvReadFileSection (\r
	396	IN CONST EFI_FIRMWARE_VOLUME2_PROTOCOL *This,\r
	397	IN CONST EFI_GUID *NameGuid,\r
	398	IN EFI_SECTION_TYPE SectionType,\r
	399	IN UINTN SectionInstance,\r
	400	IN OUT VOID **Buffer,\r
	401	IN OUT UINTN *BufferSize,\r
	402	OUT UINT32 *AuthenticationStatus\r
	403	)\r
	404	{\r
	405	EFI_STATUS Status;\r
	406	FV_DEVICE *FvDevice;\r
	407	EFI_FV_FILETYPE FileType;\r
	408	EFI_FV_FILE_ATTRIBUTES FileAttributes;\r
	409	UINTN FileSize;\r
	410	UINT8 *FileBuffer;\r
	411	FFS_FILE_LIST_ENTRY *FfsEntry;\r
	412	\r
	413	if (NameGuid == NULL \|\| Buffer == NULL) {\r
	414	return EFI_INVALID_PARAMETER;\r
	415	}\r
	416	\r
	417	FvDevice = FV_DEVICE_FROM_THIS (This);\r
	418	\r
	419	//\r
	420	// Read the whole file into buffer\r
	421	//\r
	422	FileBuffer = NULL;\r
	423	Status = FvReadFile (\r
	424	This,\r
	425	NameGuid,\r
	426	(VOID **)&FileBuffer,\r
	427	&FileSize,\r
	428	&FileType,\r
	429	&FileAttributes,\r
	430	AuthenticationStatus\r
	431	);\r
	432	//\r
	433	// Get the last key used by our call to FvReadFile as it is the FfsEntry for this file.\r
	434	//\r
	435	FfsEntry = (FFS_FILE_LIST_ENTRY *) FvDevice->LastKey;\r
	436	\r
	437	if (EFI_ERROR (Status)) {\r
	438	return Status;\r
	439	}\r
	440	\r
	441	//\r
	442	// Check to see that the file actually HAS sections before we go any further.\r
	443	//\r
	444	if (FileType == EFI_FV_FILETYPE_RAW) {\r
	445	Status = EFI_NOT_FOUND;\r
	446	goto Done;\r
	447	}\r
	448	\r
	449	//\r
	450	// Use FfsEntry to cache Section Extraction Protocol Inforomation\r
	451	//\r
	452	if (FfsEntry->StreamHandle == 0) {\r
	453	Status = OpenSectionStream (\r
	454	FileSize,\r
	455	FileBuffer,\r
	456	&FfsEntry->StreamHandle\r
	457	);\r
	458	if (EFI_ERROR (Status)) {\r
	459	goto Done;\r
	460	}\r
	461	}\r
	462	\r
	463	//\r
	464	// If SectionType == 0 We need the whole section stream\r
	465	//\r
	466	Status = GetSection (\r
	467	FfsEntry->StreamHandle,\r
	468	(SectionType == 0) ? NULL : &SectionType,\r
	469	NULL,\r
	470	(SectionType == 0) ? 0 : SectionInstance,\r
	471	Buffer,\r
	472	BufferSize,\r
	473	AuthenticationStatus\r
	474	);\r
	475	\r
	476	//\r
	477	// Close of stream defered to close of FfsHeader list to allow SEP to cache data\r
	478	//\r
	479	\r
	480	Done:\r
	481	CoreFreePool (FileBuffer);\r
	482	\r
	483	return Status;\r
	484	}\r
	485	\r
	486	\r