\r
MBR - Master Boot Record is in the first sector of a partitioned hard disk.\r
The MBR supports four partitions per disk. The MBR also contains legacy\r
- code that is not run on an EFI system. The legacy code reads the \r
- first sector of the active partition into memory and \r
+ code that is not run on an EFI system. The legacy code reads the\r
+ first sector of the active partition into memory and\r
\r
- BPB - BIOS Parameter Block is in the first sector of a FAT file system. \r
- The BPB contains information about the FAT file system. The BPB is \r
+ BPB - BIOS Parameter Block is in the first sector of a FAT file system.\r
+ The BPB contains information about the FAT file system. The BPB is\r
always on the first sector of a media. The first sector also contains\r
the legacy boot strap code.\r
\r
+Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc.\r
Copyright (c) 2014, Hewlett-Packard Development Company, L.P.<BR>\r
-Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>\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
+Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>\r
+SPDX-License-Identifier: BSD-2-Clause-Patent\r
\r
**/\r
\r
\r
@param Mbr Parent Handle.\r
@param LastLba Last Lba address on the device.\r
- \r
+\r
@retval TRUE Mbr is a Valid MBR.\r
@retval FALSE Mbr is not a Valid MBR.\r
\r
// return FALSE since no block devices on a system are implemented\r
// with INT 13h\r
//\r
- \r
+\r
DEBUG((EFI_D_INFO, "PartitionValidMbr: Bad MBR partition size EndingLBA(%1x) > LastLBA(%1x)\n", EndingLBA, LastLba));\r
\r
return FALSE;\r
@param[in] BlockIo Parent BlockIo interface.\r
@param[in] BlockIo2 Parent BlockIo2 interface.\r
@param[in] DevicePath Parent Device Path.\r
- \r
+\r
@retval EFI_SUCCESS A child handle was added.\r
@retval EFI_MEDIA_CHANGED Media change was detected.\r
@retval Others MBR partition was not found.\r
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath\r
)\r
{\r
- EFI_STATUS Status;\r
- MASTER_BOOT_RECORD *Mbr;\r
- UINT32 ExtMbrStartingLba;\r
- UINTN Index;\r
- HARDDRIVE_DEVICE_PATH HdDev;\r
- HARDDRIVE_DEVICE_PATH ParentHdDev;\r
- EFI_STATUS Found;\r
- EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r
- EFI_DEVICE_PATH_PROTOCOL *LastDevicePathNode;\r
- UINT32 BlockSize;\r
- UINT32 MediaId;\r
- EFI_LBA LastBlock;\r
+ EFI_STATUS Status;\r
+ MASTER_BOOT_RECORD *Mbr;\r
+ UINT32 ExtMbrStartingLba;\r
+ UINT32 Index;\r
+ HARDDRIVE_DEVICE_PATH HdDev;\r
+ HARDDRIVE_DEVICE_PATH ParentHdDev;\r
+ EFI_STATUS Found;\r
+ EFI_DEVICE_PATH_PROTOCOL *DevicePathNode;\r
+ EFI_DEVICE_PATH_PROTOCOL *LastDevicePathNode;\r
+ UINT32 BlockSize;\r
+ UINT32 MediaId;\r
+ EFI_LBA LastSector;\r
+ EFI_PARTITION_INFO_PROTOCOL PartitionInfo;\r
\r
Found = EFI_NOT_FOUND;\r
\r
- BlockSize = BlockIo->Media->BlockSize;\r
- MediaId = BlockIo->Media->MediaId;\r
- LastBlock = BlockIo->Media->LastBlock;\r
+ BlockSize = BlockIo->Media->BlockSize;\r
+ MediaId = BlockIo->Media->MediaId;\r
+ LastSector = DivU64x32 (\r
+ MultU64x32 (BlockIo->Media->LastBlock + 1, BlockSize),\r
+ MBR_SIZE\r
+ ) - 1;\r
+\r
+ //\r
+ // Ensure the block size can hold the MBR\r
+ //\r
+ if (BlockSize < sizeof (MASTER_BOOT_RECORD)) {\r
+ return EFI_NOT_FOUND;\r
+ }\r
\r
Mbr = AllocatePool (BlockSize);\r
if (Mbr == NULL) {\r
Found = Status;\r
goto Done;\r
}\r
- if (!PartitionValidMbr (Mbr, LastBlock)) {\r
+ if (!PartitionValidMbr (Mbr, LastSector)) {\r
goto Done;\r
}\r
//\r
if (Mbr->Partition[Index].OSIndicator == PMBR_GPT_PARTITION) {\r
//\r
// This is the guard MBR for the GPT. If you ever see a GPT disk with zero partitions you can get here.\r
- // We can not produce an MBR BlockIo for this device as the MBR spans the GPT headers. So formating \r
+ // We can not produce an MBR BlockIo for this device as the MBR spans the GPT headers. So formating\r
// this BlockIo would corrupt the GPT structures and require a recovery that would corrupt the format\r
- // that corrupted the GPT partition. \r
+ // that corrupted the GPT partition.\r
//\r
continue;\r
}\r
HdDev.PartitionSize = UNPACK_UINT32 (Mbr->Partition[Index].SizeInLBA);\r
CopyMem (HdDev.Signature, &(Mbr->UniqueMbrSignature[0]), sizeof (Mbr->UniqueMbrSignature));\r
\r
+ ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r
+ PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;\r
+ PartitionInfo.Type = PARTITION_TYPE_MBR;\r
+ if (Mbr->Partition[Index].OSIndicator == EFI_PARTITION) {\r
+ PartitionInfo.System = 1;\r
+ }\r
+ CopyMem (&PartitionInfo.Info.Mbr, &Mbr->Partition[Index], sizeof (MBR_PARTITION_RECORD));\r
+\r
Status = PartitionInstallChildHandle (\r
This,\r
Handle,\r
BlockIo2,\r
DevicePath,\r
(EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r
+ &PartitionInfo,\r
HdDev.PartitionStart,\r
HdDev.PartitionStart + HdDev.PartitionSize - 1,\r
MBR_SIZE,\r
- (BOOLEAN) (Mbr->Partition[Index].OSIndicator == EFI_PARTITION)\r
+ ((Mbr->Partition[Index].OSIndicator == EFI_PARTITION) ? &gEfiPartTypeSystemPartGuid: NULL)\r
);\r
\r
if (!EFI_ERROR (Status)) {\r
//\r
*((UINT32 *) &HdDev.Signature[0]) = 0;\r
\r
+ ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));\r
+ PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;\r
+ PartitionInfo.Type = PARTITION_TYPE_MBR;\r
+ if (Mbr->Partition[0].OSIndicator == EFI_PARTITION) {\r
+ PartitionInfo.System = 1;\r
+ }\r
+ CopyMem (&PartitionInfo.Info.Mbr, &Mbr->Partition[0], sizeof (MBR_PARTITION_RECORD));\r
+\r
Status = PartitionInstallChildHandle (\r
This,\r
Handle,\r
BlockIo2,\r
DevicePath,\r
(EFI_DEVICE_PATH_PROTOCOL *) &HdDev,\r
+ &PartitionInfo,\r
HdDev.PartitionStart - ParentHdDev.PartitionStart,\r
HdDev.PartitionStart - ParentHdDev.PartitionStart + HdDev.PartitionSize - 1,\r
MBR_SIZE,\r
- (BOOLEAN) (Mbr->Partition[0].OSIndicator == EFI_PARTITION)\r
+ ((Mbr->Partition[0].OSIndicator == EFI_PARTITION) ? &gEfiPartTypeSystemPartGuid: NULL)\r
);\r
if (!EFI_ERROR (Status)) {\r
Found = EFI_SUCCESS;\r
projects / mirror_edk2.git / blobdiff