diff options
Diffstat (limited to 'EdkModulePkg/Universal/Disk/Partition/Dxe/Gpt.c')
| -rw-r--r-- | EdkModulePkg/Universal/Disk/Partition/Dxe/Gpt.c | 785 |
1 files changed, 0 insertions, 785 deletions
diff --git a/EdkModulePkg/Universal/Disk/Partition/Dxe/Gpt.c b/EdkModulePkg/Universal/Disk/Partition/Dxe/Gpt.c deleted file mode 100644 index 61a4ec5e70..0000000000 --- a/EdkModulePkg/Universal/Disk/Partition/Dxe/Gpt.c +++ /dev/null @@ -1,785 +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:
-
- Gpt.c
-
-Abstract:
-
- Decode a hard disk partitioned with the GPT scheme in the EFI 1.0
- specification.
-
---*/
-
-#include "Partition.h"
-
-STATIC
-BOOLEAN
-PartitionValidGptTable (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_LBA Lba,
- OUT EFI_PARTITION_TABLE_HEADER *PartHeader
- );
-
-STATIC
-BOOLEAN
-PartitionCheckGptEntryArrayCRC (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_PARTITION_TABLE_HEADER *PartHeader
- );
-
-STATIC
-BOOLEAN
-PartitionRestoreGptTable (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_PARTITION_TABLE_HEADER *PartHeader
- );
-
-STATIC
-VOID
-PartitionCheckGptEntry (
- IN EFI_PARTITION_TABLE_HEADER *PartHeader,
- IN EFI_PARTITION_ENTRY *PartEntry,
- OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus
- );
-
-STATIC
-BOOLEAN
-PartitionCheckCrcAltSize (
- IN UINTN MaxSize,
- IN UINTN Size,
- IN OUT EFI_TABLE_HEADER *Hdr
- );
-
-STATIC
-BOOLEAN
-PartitionCheckCrc (
- IN UINTN MaxSize,
- IN OUT EFI_TABLE_HEADER *Hdr
- );
-
-STATIC
-VOID
-PartitionSetCrcAltSize (
- IN UINTN Size,
- IN OUT EFI_TABLE_HEADER *Hdr
- );
-
-STATIC
-VOID
-PartitionSetCrc (
- IN OUT EFI_TABLE_HEADER *Hdr
- );
-
-EFI_STATUS
-PartitionInstallGptChildHandles (
- IN EFI_DRIVER_BINDING_PROTOCOL *This,
- IN EFI_HANDLE Handle,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
- )
-/*++
-
-Routine Description:
- Install child handles if the Handle supports GPT partition structure.
-
-Arguments:
- This - Calling context.
- Handle - Parent Handle
- DiskIo - Parent DiskIo interface
- BlockIo - Parent BlockIo interface
- DevicePath - Parent Device Path
-
-Returns:
- EFI_SUCCESS - Valid GPT disk
- EFI_MEDIA_CHANGED - Media changed Detected
- !EFI_SUCCESS - Not a valid GPT disk
-
---*/
-{
- EFI_STATUS Status;
- UINT32 BlockSize;
- EFI_LBA LastBlock;
- MASTER_BOOT_RECORD *ProtectiveMbr;
- EFI_PARTITION_TABLE_HEADER *PrimaryHeader;
- EFI_PARTITION_TABLE_HEADER *BackupHeader;
- EFI_PARTITION_ENTRY *PartEntry;
- EFI_PARTITION_ENTRY_STATUS *PEntryStatus;
- UINTN Index;
- EFI_STATUS GptValid;
- HARDDRIVE_DEVICE_PATH HdDev;
-
- ProtectiveMbr = NULL;
- PrimaryHeader = NULL;
- BackupHeader = NULL;
- PartEntry = NULL;
- PEntryStatus = NULL;
-
- BlockSize = BlockIo->Media->BlockSize;
- LastBlock = BlockIo->Media->LastBlock;
-
- DEBUG ((EFI_D_INFO, " BlockSize : %d \n", BlockSize));
- DEBUG ((EFI_D_INFO, " LastBlock : %x \n", LastBlock));
-
- GptValid = EFI_NOT_FOUND;
-
- //
- // Allocate a buffer for the Protective MBR
- //
- ProtectiveMbr = AllocatePool (BlockSize);
- if (ProtectiveMbr == NULL) {
- return EFI_NOT_FOUND;
- }
-
- //
- // Read the Protective MBR from LBA #0
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- BlockIo->Media->MediaId,
- 0,
- BlockIo->Media->BlockSize,
- ProtectiveMbr
- );
- if (EFI_ERROR (Status)) {
- GptValid = Status;
- goto Done;
- }
- //
- // Verify that the Protective MBR is valid
- //
- if (ProtectiveMbr->Partition[0].BootIndicator != 0x00 ||
- ProtectiveMbr->Partition[0].OSIndicator != PMBR_GPT_PARTITION ||
- UNPACK_UINT32 (ProtectiveMbr->Partition[0].StartingLBA) != 1
- ) {
- goto Done;
- }
-
- //
- // Allocate the GPT structures
- //
- PrimaryHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));
- if (PrimaryHeader == NULL) {
- goto Done;
- }
-
- BackupHeader = AllocateZeroPool (sizeof (EFI_PARTITION_TABLE_HEADER));
-
- if (BackupHeader == NULL) {
- goto Done;
- }
-
- //
- // Check primary and backup partition tables
- //
- if (!PartitionValidGptTable (BlockIo, DiskIo, PRIMARY_PART_HEADER_LBA, PrimaryHeader)) {
- DEBUG ((EFI_D_INFO, " Not Valid primary partition table\n"));
-
- if (!PartitionValidGptTable (BlockIo, DiskIo, LastBlock, BackupHeader)) {
- DEBUG ((EFI_D_INFO, " Not Valid backup partition table\n"));
- goto Done;
- } else {
- DEBUG ((EFI_D_INFO, " Valid backup partition table\n"));
- DEBUG ((EFI_D_INFO, " Restore primary partition table by the backup\n"));
- if (!PartitionRestoreGptTable (BlockIo, DiskIo, BackupHeader)) {
- DEBUG ((EFI_D_INFO, " Restore primary partition table error\n"));
- }
-
- if (PartitionValidGptTable (BlockIo, DiskIo, BackupHeader->AlternateLBA, PrimaryHeader)) {
- DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));
- }
- }
- } else if (!PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {
- DEBUG ((EFI_D_INFO, " Valid primary and !Valid backup partition table\n"));
- DEBUG ((EFI_D_INFO, " Restore backup partition table by the primary\n"));
- if (!PartitionRestoreGptTable (BlockIo, DiskIo, PrimaryHeader)) {
- DEBUG ((EFI_D_INFO, " Restore backup partition table error\n"));
- }
-
- if (PartitionValidGptTable (BlockIo, DiskIo, PrimaryHeader->AlternateLBA, BackupHeader)) {
- DEBUG ((EFI_D_INFO, " Restore backup partition table success\n"));
- }
-
- }
-
- DEBUG ((EFI_D_INFO, " Valid primary and Valid backup partition table\n"));
-
- //
- // Read the EFI Partition Entries
- //
- PartEntry = AllocatePool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY));
- if (PartEntry == NULL) {
- DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));
- goto Done;
- }
-
- Status = DiskIo->ReadDisk (
- DiskIo,
- BlockIo->Media->MediaId,
- MultU64x32(PrimaryHeader->PartitionEntryLBA, BlockSize),
- PrimaryHeader->NumberOfPartitionEntries * (PrimaryHeader->SizeOfPartitionEntry),
- PartEntry
- );
- if (EFI_ERROR (Status)) {
- GptValid = Status;
- DEBUG ((EFI_D_INFO, " Partition Entry ReadBlocks error\n"));
- goto Done;
- }
-
- DEBUG ((EFI_D_INFO, " Partition entries read block success\n"));
-
- DEBUG ((EFI_D_INFO, " Number of partition entries: %d\n", PrimaryHeader->NumberOfPartitionEntries));
-
- PEntryStatus = AllocateZeroPool (PrimaryHeader->NumberOfPartitionEntries * sizeof (EFI_PARTITION_ENTRY_STATUS));
- if (PEntryStatus == NULL) {
- DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));
- goto Done;
- }
-
- //
- // Check the integrity of partition entries
- //
- PartitionCheckGptEntry (PrimaryHeader, PartEntry, PEntryStatus);
-
- //
- // If we got this far the GPT layout of the disk is valid and we should return true
- //
- GptValid = EFI_SUCCESS;
-
- //
- // Create child device handles
- //
- for (Index = 0; Index < PrimaryHeader->NumberOfPartitionEntries; Index++) {
- if (CompareGuid (&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeUnusedGuid) ||
- PEntryStatus[Index].OutOfRange ||
- PEntryStatus[Index].Overlap
- ) {
- //
- // Don't use null EFI Partition Entries or Invalid Partition Entries
- //
- continue;
- }
-
- ZeroMem (&HdDev, sizeof (HdDev));
- HdDev.Header.Type = MEDIA_DEVICE_PATH;
- HdDev.Header.SubType = MEDIA_HARDDRIVE_DP;
- SetDevicePathNodeLength (&HdDev.Header, sizeof (HdDev));
-
- HdDev.PartitionNumber = (UINT32) Index + 1;
- HdDev.MBRType = MBR_TYPE_EFI_PARTITION_TABLE_HEADER;
- HdDev.SignatureType = SIGNATURE_TYPE_GUID;
- HdDev.PartitionStart = PartEntry[Index].StartingLBA;
- HdDev.PartitionSize = PartEntry[Index].EndingLBA - PartEntry[Index].StartingLBA + 1;
- CopyMem (HdDev.Signature, &PartEntry[Index].UniquePartitionGUID, sizeof (EFI_GUID));
-
- DEBUG ((EFI_D_INFO, " Index : %d\n", Index));
- DEBUG ((EFI_D_INFO, " Start LBA : %x\n", HdDev.PartitionStart));
- DEBUG ((EFI_D_INFO, " End LBA : %x\n", PartEntry[Index].EndingLBA));
- DEBUG ((EFI_D_INFO, " Partition size: %x\n", HdDev.PartitionSize));
- DEBUG ((EFI_D_INFO, " Start : %x", MultU64x32 (PartEntry[Index].StartingLBA, BlockSize)));
- DEBUG ((EFI_D_INFO, " End : %x\n", MultU64x32 (PartEntry[Index].EndingLBA, BlockSize)));
-
- Status = PartitionInstallChildHandle (
- This,
- Handle,
- DiskIo,
- BlockIo,
- DevicePath,
- (EFI_DEVICE_PATH_PROTOCOL *) &HdDev,
- PartEntry[Index].StartingLBA,
- PartEntry[Index].EndingLBA,
- BlockSize,
- CompareGuid(&PartEntry[Index].PartitionTypeGUID, &gEfiPartTypeSystemPartGuid)
- );
- }
-
- DEBUG ((EFI_D_INFO, "Prepare to Free Pool\n"));
-
-Done:
- if (ProtectiveMbr != NULL) {
- FreePool (ProtectiveMbr);
- }
- if (PrimaryHeader != NULL) {
- FreePool (PrimaryHeader);
- }
- if (BackupHeader != NULL) {
- FreePool (BackupHeader);
- }
- if (PartEntry != NULL) {
- FreePool (PartEntry);
- }
- if (PEntryStatus != NULL) {
- FreePool (PEntryStatus);
- }
-
- return GptValid;
-}
-
-STATIC
-BOOLEAN
-PartitionValidGptTable (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_LBA Lba,
- OUT EFI_PARTITION_TABLE_HEADER *PartHeader
- )
-/*++
-
-Routine Description:
- Check if the GPT partition table is valid
-
-Arguments:
- BlockIo - Parent BlockIo interface
- DiskIo - Disk Io protocol.
- Lba - The starting Lba of the Partition Table
- PartHeader - Stores the partition table that is read
-
-Returns:
- TRUE - The partition table is valid
- FALSE - The partition table is not valid
-
---*/
-{
- EFI_STATUS Status;
- UINT32 BlockSize;
- EFI_PARTITION_TABLE_HEADER *PartHdr;
-
- BlockSize = BlockIo->Media->BlockSize;
-
- PartHdr = AllocateZeroPool (BlockSize);
-
- if (PartHdr == NULL) {
- DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));
- return FALSE;
- }
- //
- // Read the EFI Partition Table Header
- //
- Status = BlockIo->ReadBlocks (
- BlockIo,
- BlockIo->Media->MediaId,
- Lba,
- BlockSize,
- PartHdr
- );
- if (EFI_ERROR (Status)) {
- FreePool (PartHdr);
- return FALSE;
- }
-
- if (CompareMem (&PartHdr->Header.Signature, EFI_PTAB_HEADER_ID, sizeof (UINT64)) != 0 ||
- !PartitionCheckCrc (BlockSize, &PartHdr->Header) ||
- PartHdr->MyLBA != Lba
- ) {
- DEBUG ((EFI_D_INFO, " !Valid efi partition table header\n"));
- FreePool (PartHdr);
- return FALSE;
- }
-
- CopyMem (PartHeader, PartHdr, sizeof (EFI_PARTITION_TABLE_HEADER));
- if (!PartitionCheckGptEntryArrayCRC (BlockIo, DiskIo, PartHeader)) {
- FreePool (PartHdr);
- return FALSE;
- }
-
- DEBUG ((EFI_D_INFO, " Valid efi partition table header\n"));
- FreePool (PartHdr);
- return TRUE;
-}
-
-STATIC
-BOOLEAN
-PartitionCheckGptEntryArrayCRC (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_PARTITION_TABLE_HEADER *PartHeader
- )
-/*++
-
-Routine Description:
-
- Check if the CRC field in the Partition table header is valid
- for Partition entry array
-
-Arguments:
-
- BlockIo - parent BlockIo interface
- DiskIo - Disk Io Protocol.
- PartHeader - Partition table header structure
-
-Returns:
-
- TRUE - the CRC is valid
- FALSE - the CRC is invalid
-
---*/
-{
- EFI_STATUS Status;
- UINT8 *Ptr;
- UINT32 Crc;
- UINTN Size;
-
- //
- // Read the EFI Partition Entries
- //
- Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);
- if (Ptr == NULL) {
- DEBUG ((EFI_D_ERROR, " Allocate pool error\n"));
- return FALSE;
- }
-
- Status = DiskIo->ReadDisk (
- DiskIo,
- BlockIo->Media->MediaId,
- MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),
- PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,
- Ptr
- );
- if (EFI_ERROR (Status)) {
- FreePool (Ptr);
- return FALSE;
- }
-
- Size = PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry;
-
- Status = gBS->CalculateCrc32 (Ptr, Size, &Crc);
- if (EFI_ERROR (Status)) {
- DEBUG ((EFI_D_ERROR, "CheckPEntryArrayCRC: Crc calculation failed\n"));
- FreePool (Ptr);
- return FALSE;
- }
-
- FreePool (Ptr);
-
- return (BOOLEAN) (PartHeader->PartitionEntryArrayCRC32 == Crc);
-}
-
-STATIC
-BOOLEAN
-PartitionRestoreGptTable (
- IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
- IN EFI_DISK_IO_PROTOCOL *DiskIo,
- IN EFI_PARTITION_TABLE_HEADER *PartHeader
- )
-/*++
-
-Routine Description:
-
- Restore Partition Table to its alternate place
- (Primary -> Backup or Backup -> Primary)
-
-Arguments:
-
- BlockIo - parent BlockIo interface
- DiskIo - Disk Io Protocol.
- PartHeader - the source Partition table header structure
-
-Returns:
-
- TRUE - Restoring succeeds
- FALSE - Restoring failed
-
---*/
-{
- EFI_STATUS Status;
- UINTN BlockSize;
- EFI_PARTITION_TABLE_HEADER *PartHdr;
- EFI_LBA PEntryLBA;
- UINT8 *Ptr;
-
- PartHdr = NULL;
- Ptr = NULL;
-
- BlockSize = BlockIo->Media->BlockSize;
-
- PartHdr = AllocateZeroPool (BlockSize);
-
- if (PartHdr == NULL) {
- DEBUG ((EFI_D_ERROR, "Allocate pool error\n"));
- return FALSE;
- }
-
- PEntryLBA = (PartHeader->MyLBA == PRIMARY_PART_HEADER_LBA) ? \
- (PartHeader->LastUsableLBA + 1) : \
- (PRIMARY_PART_HEADER_LBA + 1);
-
- CopyMem (PartHdr, PartHeader, sizeof (EFI_PARTITION_TABLE_HEADER));
-
- PartHdr->MyLBA = PartHeader->AlternateLBA;
- PartHdr->AlternateLBA = PartHeader->MyLBA;
- PartHdr->PartitionEntryLBA = PEntryLBA;
- PartitionSetCrc ((EFI_TABLE_HEADER *) PartHdr);
-
- Status = BlockIo->WriteBlocks (BlockIo, BlockIo->Media->MediaId, PartHdr->MyLBA, BlockSize, PartHdr);
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- Ptr = AllocatePool (PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry);
- if (Ptr == NULL) {
- DEBUG ((EFI_D_ERROR, " Allocate pool effor\n"));
- Status = EFI_OUT_OF_RESOURCES;
- goto Done;
- }
-
- Status = DiskIo->ReadDisk (
- DiskIo,
- BlockIo->Media->MediaId,
- MultU64x32(PartHeader->PartitionEntryLBA, BlockIo->Media->BlockSize),
- PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,
- Ptr
- );
- if (EFI_ERROR (Status)) {
- goto Done;
- }
-
- Status = DiskIo->WriteDisk (
- DiskIo,
- BlockIo->Media->MediaId,
- MultU64x32(PEntryLBA, BlockIo->Media->BlockSize),
- PartHeader->NumberOfPartitionEntries * PartHeader->SizeOfPartitionEntry,
- Ptr
- );
-
-Done:
- FreePool (PartHdr);
- FreePool (Ptr);
-
- if (EFI_ERROR (Status)) {
- return FALSE;
- }
-
- return TRUE;
-}
-
-STATIC
-VOID
-PartitionCheckGptEntry (
- IN EFI_PARTITION_TABLE_HEADER *PartHeader,
- IN EFI_PARTITION_ENTRY *PartEntry,
- OUT EFI_PARTITION_ENTRY_STATUS *PEntryStatus
- )
-/*++
-
-Routine Description:
-
- Check each partition entry for its range
-
-Arguments:
-
- PartHeader - the partition table header
- PartEntry - the partition entry array
- PEntryStatus - the partition entry status array recording the status of
- each partition
-
-Returns:
- VOID
-
---*/
-{
- EFI_LBA StartingLBA;
- EFI_LBA EndingLBA;
- UINTN Index1;
- UINTN Index2;
-
- DEBUG ((EFI_D_INFO, " start check partition entries\n"));
- for (Index1 = 0; Index1 < PartHeader->NumberOfPartitionEntries; Index1++) {
- if (CompareGuid (&PartEntry[Index1].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {
- continue;
- }
-
- StartingLBA = PartEntry[Index1].StartingLBA;
- EndingLBA = PartEntry[Index1].EndingLBA;
- if (StartingLBA > EndingLBA ||
- StartingLBA < PartHeader->FirstUsableLBA ||
- StartingLBA > PartHeader->LastUsableLBA ||
- EndingLBA < PartHeader->FirstUsableLBA ||
- EndingLBA > PartHeader->LastUsableLBA
- ) {
- PEntryStatus[Index1].OutOfRange = TRUE;
- continue;
- }
-
- for (Index2 = Index1 + 1; Index2 < PartHeader->NumberOfPartitionEntries; Index2++) {
-
- if (CompareGuid (&PartEntry[Index2].PartitionTypeGUID, &gEfiPartTypeUnusedGuid)) {
- continue;
- }
-
- if (PartEntry[Index2].EndingLBA >= StartingLBA && PartEntry[Index2].StartingLBA <= EndingLBA) {
- //
- // This region overlaps with the Index1'th region
- //
- PEntryStatus[Index1].Overlap = TRUE;
- PEntryStatus[Index2].Overlap = TRUE;
- continue;
-
- }
- }
- }
-
- DEBUG ((EFI_D_INFO, " End check partition entries\n"));
-}
-
-STATIC
-VOID
-PartitionSetCrc (
- IN OUT EFI_TABLE_HEADER *Hdr
- )
-/*++
-
-Routine Description:
-
- Updates the CRC32 value in the table header
-
-Arguments:
-
- Hdr - The table to update
-
-Returns:
-
- None
-
---*/
-{
- PartitionSetCrcAltSize (Hdr->HeaderSize, Hdr);
-}
-
-STATIC
-VOID
-PartitionSetCrcAltSize (
- IN UINTN Size,
- IN OUT EFI_TABLE_HEADER *Hdr
- )
-/*++
-
-Routine Description:
-
- Updates the CRC32 value in the table header
-
-Arguments:
-
- Size - The size of the table
- Hdr - The table to update
-
-Returns:
-
- None
-
---*/
-{
- UINT32 Crc;
-
- Hdr->CRC32 = 0;
- gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);
- Hdr->CRC32 = Crc;
-}
-
-STATIC
-BOOLEAN
-PartitionCheckCrc (
- IN UINTN MaxSize,
- IN OUT EFI_TABLE_HEADER *Hdr
- )
-/*++
-
-Routine Description:
-
- Checks the CRC32 value in the table header
-
-Arguments:
-
- MaxSize - Max Size limit
- Hdr - The table to check
-
-Returns:
-
- TRUE if the CRC is OK in the table
-
---*/
-{
- return PartitionCheckCrcAltSize (MaxSize, Hdr->HeaderSize, Hdr);
-}
-
-STATIC
-BOOLEAN
-PartitionCheckCrcAltSize (
- IN UINTN MaxSize,
- IN UINTN Size,
- IN OUT EFI_TABLE_HEADER *Hdr
- )
-/*++
-
-Routine Description:
-
- Checks the CRC32 value in the table header
-
-Arguments:
-
- MaxSize - Max Size Limit
- Size - The size of the table
- Hdr - The table to check
-
-Returns:
-
- TRUE if the CRC is OK in the table
-
---*/
-{
- UINT32 Crc;
- UINT32 OrgCrc;
- EFI_STATUS Status;
-
- Crc = 0;
-
- if (Size == 0) {
- //
- // If header size is 0 CRC will pass so return FALSE here
- //
- return FALSE;
- }
-
- if (MaxSize && Size > MaxSize) {
- DEBUG ((EFI_D_ERROR, "CheckCrc32: Size > MaxSize\n"));
- return FALSE;
- }
- //
- // clear old crc from header
- //
- OrgCrc = Hdr->CRC32;
- Hdr->CRC32 = 0;
-
- Status = gBS->CalculateCrc32 ((UINT8 *) Hdr, Size, &Crc);
- if (EFI_ERROR (Status)) {
- DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc calculation failed\n"));
- return FALSE;
- }
- //
- // set results
- //
- Hdr->CRC32 = Crc;
-
- //
- // return status
- //
- DEBUG_CODE_BEGIN ();
- if (OrgCrc != Crc) {
- DEBUG ((EFI_D_ERROR, "CheckCrc32: Crc check failed\n"));
- }
- DEBUG_CODE_END ();
-
- return (BOOLEAN) (OrgCrc == Crc);
-}
|