d18d8a1d0e
Signed-off-by: jljusten git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@11919 6f19259b-4bc3-4df7-8a09-765794883524
282 lines
7.9 KiB
C
282 lines
7.9 KiB
C
/*++ @file
|
|
A simple FV stack so the SEC can extract the SEC Core from an
|
|
FV.
|
|
|
|
Copyright (c) 2006, Intel Corporation. All rights reserved.<BR>
|
|
This program and the accompanying materials
|
|
are licensed and made available under the terms and conditions of the BSD License
|
|
which accompanies this distribution. The full text of the license may be found at
|
|
http://opensource.org/licenses/bsd-license.php
|
|
|
|
THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
|
|
**/
|
|
|
|
#include <PiPei.h>
|
|
|
|
|
|
#define GET_OCCUPIED_SIZE(ActualSize, Alignment) \
|
|
(ActualSize) + (((Alignment) - ((ActualSize) & ((Alignment) - 1))) & ((Alignment) - 1))
|
|
|
|
EFI_FFS_FILE_STATE
|
|
GetFileState (
|
|
IN UINT8 ErasePolarity,
|
|
IN EFI_FFS_FILE_HEADER *FfsHeader
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
Returns the highest bit set of the State field
|
|
|
|
Arguments:
|
|
ErasePolarity - Erase Polarity as defined by EFI_FVB2_ERASE_POLARITY
|
|
in the Attributes field.
|
|
FfsHeader - Pointer to FFS File Header.
|
|
|
|
Returns:
|
|
Returns the highest bit in the State field
|
|
|
|
**/
|
|
{
|
|
EFI_FFS_FILE_STATE FileState;
|
|
EFI_FFS_FILE_STATE HighestBit;
|
|
|
|
FileState = FfsHeader->State;
|
|
|
|
if (ErasePolarity != 0) {
|
|
FileState = (EFI_FFS_FILE_STATE)~FileState;
|
|
}
|
|
|
|
HighestBit = 0x80;
|
|
while (HighestBit != 0 && (HighestBit & FileState) == 0) {
|
|
HighestBit >>= 1;
|
|
}
|
|
|
|
return HighestBit;
|
|
}
|
|
|
|
UINT8
|
|
CalculateHeaderChecksum (
|
|
IN EFI_FFS_FILE_HEADER *FileHeader
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
Calculates the checksum of the header of a file.
|
|
|
|
Arguments:
|
|
FileHeader - Pointer to FFS File Header.
|
|
|
|
Returns:
|
|
Checksum of the header.
|
|
|
|
**/
|
|
{
|
|
UINT8 *ptr;
|
|
UINTN Index;
|
|
UINT8 Sum;
|
|
|
|
Sum = 0;
|
|
ptr = (UINT8 *) FileHeader;
|
|
|
|
for (Index = 0; Index < sizeof (EFI_FFS_FILE_HEADER) - 3; Index += 4) {
|
|
Sum = (UINT8) (Sum + ptr[Index]);
|
|
Sum = (UINT8) (Sum + ptr[Index + 1]);
|
|
Sum = (UINT8) (Sum + ptr[Index + 2]);
|
|
Sum = (UINT8) (Sum + ptr[Index + 3]);
|
|
}
|
|
|
|
for (; Index < sizeof (EFI_FFS_FILE_HEADER); Index++) {
|
|
Sum = (UINT8) (Sum + ptr[Index]);
|
|
}
|
|
//
|
|
// State field (since this indicates the different state of file).
|
|
//
|
|
Sum = (UINT8) (Sum - FileHeader->State);
|
|
//
|
|
// Checksum field of the file is not part of the header checksum.
|
|
//
|
|
Sum = (UINT8) (Sum - FileHeader->IntegrityCheck.Checksum.File);
|
|
|
|
return Sum;
|
|
}
|
|
|
|
EFI_STATUS
|
|
SecFfsFindNextFile (
|
|
IN EFI_FV_FILETYPE SearchType,
|
|
IN EFI_PEI_FV_HANDLE FvHandle,
|
|
IN OUT EFI_PEI_FILE_HANDLE *FileHandle
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
Given the input file pointer, search for the next matching file in the
|
|
FFS volume as defined by SearchType. The search starts from FileHeader inside
|
|
the Firmware Volume defined by FwVolHeader.
|
|
|
|
Arguments:
|
|
SearchType - Filter to find only files of this type.
|
|
Type EFI_FV_FILETYPE_ALL causes no filtering to be done.
|
|
FwVolHeader - Pointer to the FV header of the volume to search.
|
|
This parameter must point to a valid FFS volume.
|
|
FileHeader - Pointer to the current file from which to begin searching.
|
|
This pointer will be updated upon return to reflect the file
|
|
found.
|
|
|
|
Returns:
|
|
EFI_NOT_FOUND - No files matching the search criteria were found
|
|
EFI_SUCCESS
|
|
|
|
**/
|
|
{
|
|
EFI_FFS_FILE_HEADER *FfsFileHeader;
|
|
UINT32 FileLength;
|
|
UINT32 FileOccupiedSize;
|
|
UINT32 FileOffset;
|
|
UINT64 FvLength;
|
|
UINT8 ErasePolarity;
|
|
UINT8 FileState;
|
|
EFI_FIRMWARE_VOLUME_HEADER *FwVolHeader;
|
|
EFI_FFS_FILE_HEADER **FileHeader;
|
|
|
|
//
|
|
// Convert the handle of FV to FV header for memory-mapped firmware volume
|
|
//
|
|
FwVolHeader = (EFI_FIRMWARE_VOLUME_HEADER *) FvHandle;
|
|
FileHeader = (EFI_FFS_FILE_HEADER **)FileHandle;
|
|
|
|
FvLength = FwVolHeader->FvLength;
|
|
if (FwVolHeader->Attributes & EFI_FVB2_ERASE_POLARITY) {
|
|
ErasePolarity = 1;
|
|
} else {
|
|
ErasePolarity = 0;
|
|
}
|
|
//
|
|
// If FileHeader is not specified (NULL) start with the first file in the
|
|
// firmware volume. Otherwise, start from the FileHeader.
|
|
//
|
|
if (*FileHeader == NULL) {
|
|
FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FwVolHeader + FwVolHeader->HeaderLength);
|
|
} else {
|
|
//
|
|
// Length is 24 bits wide so mask upper 8 bits
|
|
// FileLength is adjusted to FileOccupiedSize as it is 8 byte aligned.
|
|
//
|
|
FileLength = *(UINT32 *) (*FileHeader)->Size & 0x00FFFFFF;
|
|
FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8);
|
|
FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) *FileHeader + FileOccupiedSize);
|
|
}
|
|
|
|
FileOffset = (UINT32) ((UINT8 *) FfsFileHeader - (UINT8 *) FwVolHeader);
|
|
|
|
while (FileOffset < (FvLength - sizeof (EFI_FFS_FILE_HEADER))) {
|
|
//
|
|
// Get FileState which is the highest bit of the State
|
|
//
|
|
FileState = GetFileState (ErasePolarity, FfsFileHeader);
|
|
|
|
switch (FileState) {
|
|
|
|
case EFI_FILE_HEADER_INVALID:
|
|
FileOffset += sizeof (EFI_FFS_FILE_HEADER);
|
|
FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + sizeof (EFI_FFS_FILE_HEADER));
|
|
break;
|
|
|
|
case EFI_FILE_DATA_VALID:
|
|
case EFI_FILE_MARKED_FOR_UPDATE:
|
|
if (CalculateHeaderChecksum (FfsFileHeader) == 0) {
|
|
FileLength = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF;
|
|
FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8);
|
|
|
|
if ((SearchType == FfsFileHeader->Type) || (SearchType == EFI_FV_FILETYPE_ALL)) {
|
|
|
|
*FileHeader = FfsFileHeader;
|
|
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
FileOffset += FileOccupiedSize;
|
|
FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + FileOccupiedSize);
|
|
} else {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
break;
|
|
|
|
case EFI_FILE_DELETED:
|
|
FileLength = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF;
|
|
FileOccupiedSize = GET_OCCUPIED_SIZE (FileLength, 8);
|
|
FileOffset += FileOccupiedSize;
|
|
FfsFileHeader = (EFI_FFS_FILE_HEADER *) ((UINT8 *) FfsFileHeader + FileOccupiedSize);
|
|
break;
|
|
|
|
default:
|
|
return EFI_NOT_FOUND;
|
|
|
|
}
|
|
}
|
|
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
EFI_STATUS
|
|
SecFfsFindSectionData (
|
|
IN EFI_SECTION_TYPE SectionType,
|
|
IN EFI_FFS_FILE_HEADER *FfsFileHeader,
|
|
IN OUT VOID **SectionData
|
|
)
|
|
/*++
|
|
|
|
Routine Description:
|
|
Given the input file pointer, search for the next matching section in the
|
|
FFS volume.
|
|
|
|
Arguments:
|
|
SearchType - Filter to find only sections of this type.
|
|
FfsFileHeader - Pointer to the current file to search.
|
|
SectionData - Pointer to the Section matching SectionType in FfsFileHeader.
|
|
NULL if section not found
|
|
|
|
Returns:
|
|
EFI_NOT_FOUND - No files matching the search criteria were found
|
|
EFI_SUCCESS
|
|
|
|
**/
|
|
{
|
|
UINT32 FileSize;
|
|
EFI_COMMON_SECTION_HEADER *Section;
|
|
UINT32 SectionLength;
|
|
UINT32 ParsedLength;
|
|
|
|
//
|
|
// Size is 24 bits wide so mask upper 8 bits.
|
|
// Does not include FfsFileHeader header size
|
|
// FileSize is adjusted to FileOccupiedSize as it is 8 byte aligned.
|
|
//
|
|
Section = (EFI_COMMON_SECTION_HEADER *) (FfsFileHeader + 1);
|
|
FileSize = *(UINT32 *) (FfsFileHeader->Size) & 0x00FFFFFF;
|
|
FileSize -= sizeof (EFI_FFS_FILE_HEADER);
|
|
|
|
*SectionData = NULL;
|
|
ParsedLength = 0;
|
|
while (ParsedLength < FileSize) {
|
|
if (Section->Type == SectionType) {
|
|
*SectionData = (VOID *) (Section + 1);
|
|
return EFI_SUCCESS;
|
|
}
|
|
//
|
|
// Size is 24 bits wide so mask upper 8 bits.
|
|
// SectionLength is adjusted it is 4 byte aligned.
|
|
// Go to the next section
|
|
//
|
|
SectionLength = *(UINT32 *) Section->Size & 0x00FFFFFF;
|
|
SectionLength = GET_OCCUPIED_SIZE (SectionLength, 4);
|
|
|
|
ParsedLength += SectionLength;
|
|
Section = (EFI_COMMON_SECTION_HEADER *) ((UINT8 *) Section + SectionLength);
|
|
}
|
|
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|