diff options
Diffstat (limited to 'EdkModulePkg/Core/Dxe/FwVol/Ffs.c')
| -rw-r--r-- | EdkModulePkg/Core/Dxe/FwVol/Ffs.c | 266 |
1 files changed, 0 insertions, 266 deletions
diff --git a/EdkModulePkg/Core/Dxe/FwVol/Ffs.c b/EdkModulePkg/Core/Dxe/FwVol/Ffs.c deleted file mode 100644 index 23c84b34f8..0000000000 --- a/EdkModulePkg/Core/Dxe/FwVol/Ffs.c +++ /dev/null @@ -1,266 +0,0 @@ -/*++
-
-Copyright (c) 2006, Intel Corporation
-All rights reserved. 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.
-
-Module Name:
-
- Ffs.c
-
-Abstract:
-
- FFS file access utilities.
-
---*/
-
-
-#include <DxeMain.h>
-
-#define PHYSICAL_ADDRESS_TO_POINTER(Address) ((VOID *)((UINTN)(Address)))
-
-
-EFI_FFS_FILE_STATE
-GetFileState (
- IN UINT8 ErasePolarity,
- IN EFI_FFS_FILE_HEADER *FfsHeader
- )
-/*++
-
-Routine Description:
- Get the FFS file state by checking the highest bit set in the header's state field
-
-Arguments:
- ErasePolarity - Erase polarity attribute of the firmware volume
- FfsHeader - Points to the FFS file header
-
-Returns:
- FFS File state
-
---*/
-{
- EFI_FFS_FILE_STATE FileState;
- UINT8 HighestBit;
-
- FileState = FfsHeader->State;
-
- if (ErasePolarity != 0) {
- FileState = (EFI_FFS_FILE_STATE)~FileState;
- }
-
- HighestBit = 0x80;
- while (HighestBit != 0 && ((HighestBit & FileState) == 0)) {
- HighestBit >>= 1;
- }
-
- return (EFI_FFS_FILE_STATE)HighestBit;
-}
-
-
-BOOLEAN
-IsBufferErased (
- IN UINT8 ErasePolarity,
- IN VOID *InBuffer,
- IN UINTN BufferSize
- )
-/*++
-
-Routine Description:
- Check if a block of buffer is erased
-
-Arguments:
- ErasePolarity - Erase polarity attribute of the firmware volume
- InBuffer - The buffer to be checked
- BufferSize - Size of the buffer in bytes
-
-Returns:
- TRUE - The block of buffer is erased
- FALSE - The block of buffer is not erased
-
---*/
-{
- UINTN Count;
- UINT8 EraseByte;
- UINT8 *Buffer;
-
- if(ErasePolarity == 1) {
- EraseByte = 0xFF;
- } else {
- EraseByte = 0;
- }
-
- Buffer = InBuffer;
- for (Count = 0; Count < BufferSize; Count++) {
- if (Buffer[Count] != EraseByte) {
- return FALSE;
- }
- }
-
- return TRUE;
-}
-
-
-BOOLEAN
-VerifyFvHeaderChecksum (
- IN EFI_FIRMWARE_VOLUME_HEADER *FvHeader
- )
-/*++
-
-Routine Description:
- Verify checksum of the firmware volume header
-
-Arguments:
- FvHeader - Points to the firmware volume header to be checked
-
-Returns:
- TRUE - Checksum verification passed
- FALSE - Checksum verification failed
-
---*/
-{
- UINT32 Index;
- UINT32 HeaderLength;
- UINT16 Checksum;
- UINT16 *ptr;
-
- HeaderLength = FvHeader->HeaderLength;
- ptr = (UINT16 *)FvHeader;
- Checksum = 0;
-
- for (Index = 0; Index < HeaderLength / sizeof (UINT16); Index++) {
- Checksum = (UINT16)(Checksum + ptr[Index]);
- }
-
- if (Checksum == 0) {
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-STATIC
-BOOLEAN
-VerifyHeaderChecksum (
- IN EFI_FFS_FILE_HEADER *FfsHeader
- )
-/*++
-
-Routine Description:
- Verify checksum of the FFS file header
-
-Arguments:
- FfsHeader - Points to the FFS file header to be checked
-
-Returns:
- TRUE - Checksum verification passed
- FALSE - Checksum verification failed
-
---*/
-{
- UINT32 Index;
- UINT8 *ptr;
- UINT8 HeaderChecksum;
-
- ptr = (UINT8 *)FfsHeader;
- HeaderChecksum = 0;
- for (Index = 0; Index < sizeof(EFI_FFS_FILE_HEADER); Index++) {
- HeaderChecksum = (UINT8)(HeaderChecksum + ptr[Index]);
- }
-
- HeaderChecksum = (UINT8) (HeaderChecksum - FfsHeader->State - FfsHeader->IntegrityCheck.Checksum.File);
-
- if (HeaderChecksum == 0) {
- return TRUE;
- } else {
- return FALSE;
- }
-}
-
-
-BOOLEAN
-IsValidFfsHeader (
- IN UINT8 ErasePolarity,
- IN EFI_FFS_FILE_HEADER *FfsHeader,
- OUT EFI_FFS_FILE_STATE *FileState
- )
-/*++
-
-Routine Description:
- Check if it's a valid FFS file header
-
-Arguments:
- ErasePolarity - Erase polarity attribute of the firmware volume
- FfsHeader - Points to the FFS file header to be checked
- FileState - FFS file state to be returned
-
-Returns:
- TRUE - Valid FFS file header
- FALSE - Invalid FFS file header
-
---*/
-{
- *FileState = GetFileState (ErasePolarity, FfsHeader);
-
- switch (*FileState) {
- case EFI_FILE_HEADER_VALID:
- case EFI_FILE_DATA_VALID:
- case EFI_FILE_MARKED_FOR_UPDATE:
- case EFI_FILE_DELETED:
- //
- // Here we need to verify header checksum
- //
- return VerifyHeaderChecksum (FfsHeader);
-
- case EFI_FILE_HEADER_CONSTRUCTION:
- case EFI_FILE_HEADER_INVALID:
- default:
- return FALSE;
- }
-}
-
-
-BOOLEAN
-IsValidFfsFile (
- IN UINT8 ErasePolarity,
- IN EFI_FFS_FILE_HEADER *FfsHeader
- )
-/*++
-
-Routine Description:
- Check if it's a valid FFS file.
- Here we are sure that it has a valid FFS file header since we must call IsValidFfsHeader() first.
-
-Arguments:
- ErasePolarity - Erase polarity attribute of the firmware volume
- FfsHeader - Points to the FFS file to be checked
-
-Returns:
- TRUE - Valid FFS file
- FALSE - Invalid FFS file
-
---*/
-{
- EFI_FFS_FILE_STATE FileState;
-
- FileState = GetFileState (ErasePolarity, FfsHeader);
- switch (FileState) {
-
- case EFI_FILE_DELETED:
- case EFI_FILE_DATA_VALID:
- case EFI_FILE_MARKED_FOR_UPDATE:
- //
- // Some other vliadation like file content checksum might be done here.
- // For performance issue, Tiano only do FileState check.
- //
- return TRUE;
-
- default:
- return FALSE;
- }
-}
-
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