diff options
Diffstat (limited to 'FatPkg/FatPei/Part.c')
| -rw-r--r-- | FatPkg/FatPei/Part.c | 402 |
1 files changed, 9 insertions, 393 deletions
diff --git a/FatPkg/FatPei/Part.c b/FatPkg/FatPei/Part.c index be185460f3..8a54e56f5a 100644 --- a/FatPkg/FatPei/Part.c +++ b/FatPkg/FatPei/Part.c @@ -2,7 +2,7 @@ Routines supporting partition discovery and
logical device reading
-Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2019, 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
@@ -14,20 +14,18 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. **/
-#include <IndustryStandard/Mbr.h>
-#include <IndustryStandard/ElTorito.h>
#include "FatLitePeim.h"
/**
This function finds Eltorito partitions. Main algorithm
is ported from DXE partition driver.
- @param PrivateData The global memory map
- @param ParentBlockDevNo The parent block device
+ @param[in] PrivateData The global memory map
+ @param[in] ParentBlockDevNo The parent block device
@retval TRUE New partitions are detected and logical block devices
- are added to block device array
- @retval FALSE No New partitions are added;
+ are added to block device array
+ @retval FALSE No new partitions are added
**/
BOOLEAN
@@ -40,12 +38,12 @@ FatFindEltoritoPartitions ( This function finds Mbr partitions. Main algorithm
is ported from DXE partition driver.
- @param PrivateData The global memory map
- @param ParentBlockDevNo The parent block device
+ @param[in] PrivateData The global memory map
+ @param[in] ParentBlockDevNo The parent block device
@retval TRUE New partitions are detected and logical block devices
- are added to block device array
- @retval FALSE No New partitions are added;
+ are added to block device array
+ @retval FALSE No new partitions are added
**/
BOOLEAN
@@ -54,7 +52,6 @@ FatFindMbrPartitions ( IN UINTN ParentBlockDevNo
);
-
/**
This function finds partitions (logical devices) in physical block devices.
@@ -83,384 +80,3 @@ FatFindPartitions ( } while (Found && PrivateData->BlockDeviceCount <= PEI_FAT_MAX_BLOCK_DEVICE);
}
-
-/**
- This function finds Eltorito partitions. Main algorithm
- is ported from DXE partition driver.
-
- @param PrivateData The global memory map
- @param ParentBlockDevNo The parent block device
-
- @retval TRUE New partitions are detected and logical block devices
- are added to block device array
- @retval FALSE No New partitions are added;
-
-**/
-BOOLEAN
-FatFindEltoritoPartitions (
- IN PEI_FAT_PRIVATE_DATA *PrivateData,
- IN UINTN ParentBlockDevNo
- )
-{
- EFI_STATUS Status;
- BOOLEAN Found;
- PEI_FAT_BLOCK_DEVICE *BlockDev;
- PEI_FAT_BLOCK_DEVICE *ParentBlockDev;
- UINT32 VolDescriptorLba;
- UINT32 Lba;
- CDROM_VOLUME_DESCRIPTOR *VolDescriptor;
- ELTORITO_CATALOG *Catalog;
- UINTN Check;
- UINTN Index;
- UINTN MaxIndex;
- UINT16 *CheckBuffer;
- UINT32 SubBlockSize;
- UINT32 SectorCount;
- UINT32 VolSpaceSize;
-
- if (ParentBlockDevNo > PEI_FAT_MAX_BLOCK_DEVICE - 1) {
- return FALSE;
- }
-
- Found = FALSE;
- ParentBlockDev = &(PrivateData->BlockDevice[ParentBlockDevNo]);
- VolSpaceSize = 0;
-
- //
- // CD_ROM has the fixed block size as 2048 bytes
- //
- if (ParentBlockDev->BlockSize != 2048) {
- return FALSE;
- }
-
- VolDescriptor = (CDROM_VOLUME_DESCRIPTOR *) PrivateData->BlockData;
- Catalog = (ELTORITO_CATALOG *) VolDescriptor;
-
- //
- // the ISO-9660 volume descriptor starts at 32k on the media
- // and CD_ROM has the fixed block size as 2048 bytes, so...
- //
- VolDescriptorLba = 15;
- //
- // ((16*2048) / Media->BlockSize) - 1;
- //
- // Loop: handle one volume descriptor per time
- //
- while (TRUE) {
-
- VolDescriptorLba += 1;
- if (VolDescriptorLba > ParentBlockDev->LastBlock) {
- //
- // We are pointing past the end of the device so exit
- //
- break;
- }
-
- Status = FatReadBlock (
- PrivateData,
- ParentBlockDevNo,
- VolDescriptorLba,
- ParentBlockDev->BlockSize,
- VolDescriptor
- );
- if (EFI_ERROR (Status)) {
- break;
- }
- //
- // Check for valid volume descriptor signature
- //
- if (VolDescriptor->Unknown.Type == CDVOL_TYPE_END ||
- CompareMem (VolDescriptor->Unknown.Id, CDVOL_ID, sizeof (VolDescriptor->Unknown.Id)) != 0
- ) {
- //
- // end of Volume descriptor list
- //
- break;
- }
- //
- // Read the Volume Space Size from Primary Volume Descriptor 81-88 byte
- //
- if (VolDescriptor->Unknown.Type == CDVOL_TYPE_CODED) {
- VolSpaceSize = VolDescriptor->PrimaryVolume.VolSpaceSize[1];
- }
- //
- // Is it an El Torito volume descriptor?
- //
- if (CompareMem (
- VolDescriptor->BootRecordVolume.SystemId,
- CDVOL_ELTORITO_ID,
- sizeof (CDVOL_ELTORITO_ID) - 1
- ) != 0) {
- continue;
- }
- //
- // Read in the boot El Torito boot catalog
- //
- Lba = UNPACK_INT32 (VolDescriptor->BootRecordVolume.EltCatalog);
- if (Lba > ParentBlockDev->LastBlock) {
- continue;
- }
-
- Status = FatReadBlock (
- PrivateData,
- ParentBlockDevNo,
- Lba,
- ParentBlockDev->BlockSize,
- Catalog
- );
- if (EFI_ERROR (Status)) {
- continue;
- }
- //
- // We don't care too much about the Catalog header's contents, but we do want
- // to make sure it looks like a Catalog header
- //
- if (Catalog->Catalog.Indicator != ELTORITO_ID_CATALOG || Catalog->Catalog.Id55AA != 0xAA55) {
- continue;
- }
-
- Check = 0;
- CheckBuffer = (UINT16 *) Catalog;
- for (Index = 0; Index < sizeof (ELTORITO_CATALOG) / sizeof (UINT16); Index += 1) {
- Check += CheckBuffer[Index];
- }
-
- if ((Check & 0xFFFF) != 0) {
- continue;
- }
-
- MaxIndex = ParentBlockDev->BlockSize / sizeof (ELTORITO_CATALOG);
- for (Index = 1; Index < MaxIndex; Index += 1) {
- //
- // Next entry
- //
- Catalog += 1;
-
- //
- // Check this entry
- //
- if (Catalog->Boot.Indicator != ELTORITO_ID_SECTION_BOOTABLE || Catalog->Boot.Lba == 0) {
- continue;
- }
-
- SubBlockSize = 512;
- SectorCount = Catalog->Boot.SectorCount;
-
- switch (Catalog->Boot.MediaType) {
-
- case ELTORITO_NO_EMULATION:
- SubBlockSize = ParentBlockDev->BlockSize;
- SectorCount = Catalog->Boot.SectorCount;
- break;
-
- case ELTORITO_HARD_DISK:
- break;
-
- case ELTORITO_12_DISKETTE:
- SectorCount = 0x50 * 0x02 * 0x0F;
- break;
-
- case ELTORITO_14_DISKETTE:
- SectorCount = 0x50 * 0x02 * 0x12;
- break;
-
- case ELTORITO_28_DISKETTE:
- SectorCount = 0x50 * 0x02 * 0x24;
- break;
-
- default:
- SectorCount = 0;
- SubBlockSize = ParentBlockDev->BlockSize;
- break;
- }
-
- if (SectorCount < 2) {
- SectorCount = (VolSpaceSize > ParentBlockDev->LastBlock + 1) ? (UINT32) (ParentBlockDev->LastBlock - Catalog->Boot.Lba + 1) : (UINT32) (VolSpaceSize - Catalog->Boot.Lba);
- }
- //
- // Register this partition
- //
- if (PrivateData->BlockDeviceCount < PEI_FAT_MAX_BLOCK_DEVICE) {
-
- Found = TRUE;
-
- BlockDev = &(PrivateData->BlockDevice[PrivateData->BlockDeviceCount]);
-
- BlockDev->BlockSize = SubBlockSize;
- BlockDev->LastBlock = SectorCount - 1;
- BlockDev->IoAlign = ParentBlockDev->IoAlign;
- BlockDev->Logical = TRUE;
- BlockDev->PartitionChecked = FALSE;
- BlockDev->StartingPos = MultU64x32 (Catalog->Boot.Lba, ParentBlockDev->BlockSize);
- BlockDev->ParentDevNo = ParentBlockDevNo;
-
- PrivateData->BlockDeviceCount++;
- }
- }
- }
-
- ParentBlockDev->PartitionChecked = TRUE;
-
- return Found;
-
-}
-
-
-/**
- Test to see if the Mbr buffer is a valid MBR
-
- @param Mbr Parent Handle
- @param LastLba Last Lba address on the device.
-
- @retval TRUE Mbr is a Valid MBR
- @retval FALSE Mbr is not a Valid MBR
-
-**/
-BOOLEAN
-PartitionValidMbr (
- IN MASTER_BOOT_RECORD *Mbr,
- IN EFI_PEI_LBA LastLba
- )
-{
- UINT32 StartingLBA;
- UINT32 EndingLBA;
- UINT32 NewEndingLBA;
- INTN Index1;
- INTN Index2;
- BOOLEAN MbrValid;
-
- if (Mbr->Signature != MBR_SIGNATURE) {
- return FALSE;
- }
- //
- // The BPB also has this signature, so it can not be used alone.
- //
- MbrValid = FALSE;
- for (Index1 = 0; Index1 < MAX_MBR_PARTITIONS; Index1++) {
- if (Mbr->Partition[Index1].OSIndicator == 0x00 || UNPACK_UINT32 (Mbr->Partition[Index1].SizeInLBA) == 0) {
- continue;
- }
-
- MbrValid = TRUE;
- StartingLBA = UNPACK_UINT32 (Mbr->Partition[Index1].StartingLBA);
- EndingLBA = StartingLBA + UNPACK_UINT32 (Mbr->Partition[Index1].SizeInLBA) - 1;
- if (EndingLBA > LastLba) {
- //
- // Compatability Errata:
- // Some systems try to hide drive space with thier INT 13h driver
- // This does not hide space from the OS driver. This means the MBR
- // that gets created from DOS is smaller than the MBR created from
- // a real OS (NT & Win98). This leads to BlockIo->LastBlock being
- // wrong on some systems FDISKed by the OS.
- //
- // return FALSE Because no block devices on a system are implemented
- // with INT 13h
- //
- return FALSE;
- }
-
- for (Index2 = Index1 + 1; Index2 < MAX_MBR_PARTITIONS; Index2++) {
- if (Mbr->Partition[Index2].OSIndicator == 0x00 || UNPACK_INT32 (Mbr->Partition[Index2].SizeInLBA) == 0) {
- continue;
- }
-
- NewEndingLBA = UNPACK_UINT32 (Mbr->Partition[Index2].StartingLBA) + UNPACK_UINT32 (Mbr->Partition[Index2].SizeInLBA) - 1;
- if (NewEndingLBA >= StartingLBA && UNPACK_UINT32 (Mbr->Partition[Index2].StartingLBA) <= EndingLBA) {
- //
- // This region overlaps with the Index1'th region
- //
- return FALSE;
- }
- }
- }
- //
- // Non of the regions overlapped so MBR is O.K.
- //
- return MbrValid;
-}
-
-
-/**
- This function finds Mbr partitions. Main algorithm
- is ported from DXE partition driver.
-
- @param PrivateData The global memory map
- @param ParentBlockDevNo The parent block device
-
- @retval TRUE New partitions are detected and logical block devices
- are added to block device array
- @retval FALSE No New partitions are added;
-
-**/
-BOOLEAN
-FatFindMbrPartitions (
- IN PEI_FAT_PRIVATE_DATA *PrivateData,
- IN UINTN ParentBlockDevNo
- )
-{
- EFI_STATUS Status;
- MASTER_BOOT_RECORD *Mbr;
- UINTN Index;
- BOOLEAN Found;
- PEI_FAT_BLOCK_DEVICE *ParentBlockDev;
- PEI_FAT_BLOCK_DEVICE *BlockDev;
-
- if (ParentBlockDevNo > PEI_FAT_MAX_BLOCK_DEVICE - 1) {
- return FALSE;
- }
-
- ParentBlockDev = &(PrivateData->BlockDevice[ParentBlockDevNo]);
-
- Found = FALSE;
- Mbr = (MASTER_BOOT_RECORD *) PrivateData->BlockData;
-
- Status = FatReadBlock (
- PrivateData,
- ParentBlockDevNo,
- 0,
- ParentBlockDev->BlockSize,
- Mbr
- );
-
- if (EFI_ERROR (Status) || !PartitionValidMbr (Mbr, ParentBlockDev->LastBlock)) {
- goto Done;
- }
- //
- // We have a valid mbr - add each partition
- //
- for (Index = 0; Index < MAX_MBR_PARTITIONS; Index++) {
- if (Mbr->Partition[Index].OSIndicator == 0x00 || UNPACK_INT32 (Mbr->Partition[Index].SizeInLBA) == 0) {
- //
- // Don't use null MBR entries
- //
- continue;
- }
- //
- // Register this partition
- //
- if (PrivateData->BlockDeviceCount < PEI_FAT_MAX_BLOCK_DEVICE) {
-
- Found = TRUE;
-
- BlockDev = &(PrivateData->BlockDevice[PrivateData->BlockDeviceCount]);
-
- BlockDev->BlockSize = MBR_SIZE;
- BlockDev->LastBlock = UNPACK_INT32 (Mbr->Partition[Index].SizeInLBA) - 1;
- BlockDev->IoAlign = ParentBlockDev->IoAlign;
- BlockDev->Logical = TRUE;
- BlockDev->PartitionChecked = FALSE;
- BlockDev->StartingPos = MultU64x32 (
- UNPACK_INT32 (Mbr->Partition[Index].StartingLBA),
- ParentBlockDev->BlockSize
- );
- BlockDev->ParentDevNo = ParentBlockDevNo;
-
- PrivateData->BlockDeviceCount++;
- }
- }
-
-Done:
-
- ParentBlockDev->PartitionChecked = TRUE;
- return Found;
-}
|