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+//**********************************************************************
+//**********************************************************************
+//** **
+//** (C)Copyright 1985-2009, American Megatrends, Inc. **
+//** **
+//** All Rights Reserved. **
+//** **
+//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
+//** **
+//** Phone: (770)-246-8600 **
+//** **
+//**********************************************************************
+//**********************************************************************
+
+//**********************************************************************
+// $Header: /Alaska/SOURCE/Core/CORE_DXE/Partition/ElTorito.c 21 8/28/12 3:14p Pats $
+//
+// $Revision: 21 $
+//
+// $Date: 8/28/12 3:14p $
+//**********************************************************************
+// Revision History
+// ----------------
+// $Log: /Alaska/SOURCE/Core/CORE_DXE/Partition/ElTorito.c $
+//
+// 21 8/28/12 3:14p Pats
+// [TAG] EIP99287
+// [Category] Bug Fix
+// [Severity] Important
+// [Symptom] Problem booting certain HDD emulation ElTorito CD/DVD's.
+// [RootCause] If the CD has ElTorito and ISO9660 partitions, the block
+// sizeread will be the ISO9660 block size, but the ElTorito partition
+// needs the HDD block size
+// [Solution] Set block size to HDD block size if HDD emulation detected.
+// [Files] Eltorito.c
+//
+// 20 5/10/12 5:54a Rameshr
+// [TAG] EIP88924
+// [Category] Bug Fix
+// [Severity] Important
+// [Symptom] UEFI 2.3.1 SCT block io read test fail
+// [RootCause] If the CD has two Boot image , two blockio will be
+// installed by Partition driver. But the second blockIo , LastBlock value
+// is wrong
+// [Solution] 2nd logical blockIO LastBlock size calculation corrected.
+// [Files] Eltorito.c
+//
+// 19 9/27/11 7:43p Yul
+// [TAG] EIP69053
+// [Category] Bug Fix
+// [Severity] Important
+// [Symptom] System cannot boot to WINPE from CD/DVD.
+// [RootCause] Blocksize change
+// [Solution] Blocksize change
+// [Files] EIOorito.c
+//
+// 18 5/10/11 11:21a Pats
+// [TAG] - EIP 57859
+// [Category]- BUG FIX
+// [Severity]- Normal
+// [Symptom] - On EFI shell, though CD media is recognized as a Block
+// device, is not recognized as a File system.
+// [RootCause] - Blocksize change from EIP 30719.
+// [Solution] - Removed change from EIP 30719.
+// [Files] - ElTorito.c
+//
+// 17 4/16/10 4:24p Pats
+// EIP 30719: Support for the HDD with sector size more than 512bytes.
+//
+// 16 10/20/09 5:02p Felixp
+// Check for a block I/O device errors is added in
+// ElToritoCreateChildHandle function.
+//
+// 14 7/09/09 5:01p Oleksiyy
+// Files clean-up
+//
+// 13 4/23/09 11:54a Oleksiyy
+// Memory free error fix
+//
+// 12 2/19/09 1:02p Artems
+// EIP 19052 Minor improvement to support CD burned with Windows Explorer
+//
+// 11 1/16/09 3:02p Felixp
+// New Feature:
+// CD-ROM handling code is updated to create additional logical instance
+// of the Bock I/O protocol
+// based on primary volume descriptor of the CR-ROM.
+// The instance is used by the ISO 9660 file systems driver
+// (separate eModule. Not part of the Core) to implement file system
+// protocol.
+// The new parittion driver funcionality is only enabled when ISO 9660
+// file systems driver
+// ($/Source/Modules/FsIso9660) is included into the project.
+//
+// 10 1/07/08 4:21p Robert
+// Updated for coding standard
+//
+// 9 4/24/07 5:31p Robert
+// Updated Headers to compile with CHM creation
+//
+// 8 3/22/07 5:39p Robert
+// Updated Files for coding standard
+//
+// 7 8/24/06 12:34p Felixp
+// x64 support (fixes for warnings/errors)
+//
+// 5 5/19/06 10:47p Felixp
+// Device Path code updated to use NEXT_NODE/NODE_LENGTH/SET_NODE_LENGTH
+// macros to remove direct access to the Length field
+//
+// 3 5/05/05 5:07p Robert
+// When reading the data for the Volume Descriptor. There was no check
+// for the Status of the Read Blocks call. If this returned an error then it
+// was continuing on. Now it exits when an error is found
+//
+// 2 2/11/05 6:13p Felixp
+// Code optimized by using DPAddNode instead of DPAdd
+//
+// 2 1/18/05 3:22p Felixp
+// PrintDebugMessage renamed to Trace
+//
+// 3 12/21/04 4:53p Markw
+// Modified device path defines for consistency.
+//
+// 2 12/02/04 5:54p Robert
+// Partition driver version works
+//
+//**********************************************************************
+//<AMI_FHDR_START>
+//
+// Name: ElTorito.c
+//
+// Description: EFI El Torito Partition Support Functions
+//
+//<AMI_FHDR_END>
+//**********************************************************************
+
+//=============================================================================
+// Includes
+#include "Partition.h"
+#include "ElTorito.h"
+#include "mbr.h"
+
+extern BOOLEAN Iso9660FileSystemSupportEnabled;
+EFI_GUID VendorDpGuid = AMI_ISO9660_MEDIA_GUID;
+
+//=============================================================================
+// Local Variables
+
+//=============================================================================
+// Function Definitions
+
+
+
+//<AMI_PHDR_START>
+//=============================================================================
+// Procedure: ElToritoCreateChildHandle
+//
+// Description: Searches CDROM disk for El Torito bootable partitions
+// and creates a child handle for each one found
+//
+// Input:
+// *This - Pointer to the instance of this blockIo protocol
+// *BlockIo - Pointer to the parent blockIo Protocol
+// *DiskIo - Pointer to the parent DiskIo protocol
+// *DevicePath - Pointer to the Parent's device path
+// ControllerHandle - the parent's controller handle
+//
+// Output:
+//
+// Returns:
+// EFI_SUCCESS - Partition found
+// EFI_INVALID_MEDIA - a parameter passed in or in the data structure
+// is invalid
+// EFI_NO_MEDIA - No partitions found
+// EFI_OUT_OF RESOURCES - Not enough resources to allocate memory
+//
+// Referrals: ReadBlocks AllocatePool MemCmp FreePool Div64 SetMem
+// CreateChildHandle DPAddNode SET_NODE_LENGTH
+//
+//=============================================================================
+//<AMI_PHDR_END>
+EFI_STATUS ElToritoCreateChildHandle (
+ IN EFI_DRIVER_BINDING_PROTOCOL *This,
+ IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
+ IN EFI_DISK_IO_PROTOCOL *DiskIo,
+ IN EFI_DEVICE_PATH_PROTOCOL *DevicePath,
+ IN EFI_HANDLE ControllerHandle
+)
+{
+ PARTITION_DATA PData, DData;
+ EFI_STATUS Status;
+ EFI_LBA Lba;
+ BOOT_RECORD_DESC *VolDesc = NULL;
+ EL_TORITO_ENTRIES *Entry = NULL, *StartEntry = NULL;
+ CDROM_DEVICE_PATH CdDp;
+ UINT32 BlockSize;
+ UINT16 Checksum;
+ UINT16 *Temp = NULL;
+ UINTN Idx;
+ UINT32 VolSize;
+ UINT32 Sectors;
+ UINTN BootEntry;
+ UINTN Dummy;
+
+ AMI_ISO9660_DEVICE_PATH VendorDp;
+ PRIMARY_VOLUME_DESC_HEADER *PrimVolDesc;
+
+
+// TODO: The El Torito spec says that the Boot Record Volume only exists on the last session
+// we need to find the last session on the CD
+
+ // Verify that the CDROM is using the correct block size
+ if (BlockIo->Media->BlockSize != CDROM_BLOCK_SIZE)
+ {
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Allocate memory for the Boot Record Volume
+ Status = gBS->AllocatePool(EfiBootServicesData, BlockIo->Media->BlockSize, &VolDesc);
+
+ if (EFI_ERROR(Status))
+ return EFI_OUT_OF_RESOURCES;
+
+ // CDROM Spec says sector 16 contains the Primary Volume descriptor
+ Lba = CDROM_BOOT_PRI_VOL_DESCRIPTOR_SECTOR;
+
+ Status = BlockIo->ReadBlocks( BlockIo, BlockIo->Media->MediaId, Lba,
+ BlockIo->Media->BlockSize, VolDesc );
+ if (EFI_ERROR(Status))
+ {
+ gBS->FreePool(VolDesc);
+ return EFI_INVALID_PARAMETER;
+ }
+
+ // Check for valid volume descriptor signature
+ if (MemCmp (VolDesc->IsoId, "CD001", 5))
+ {
+ gBS->FreePool(VolDesc);
+ return EFI_INVALID_PARAMETER;
+ }
+
+//***********************************************************************
+// Add Logical partition for ISO 9660 support
+//***********************************************************************
+ PrimVolDesc = (PRIMARY_VOLUME_DESC_HEADER *)VolDesc;
+ BlockSize = CDROM_BLOCK_SIZE;
+
+ //Set Vendor device path
+ VendorDp.Dp.Header.Type = MEDIA_DEVICE_PATH;
+ VendorDp.Dp.Header.SubType = MEDIA_VENDOR_DP;
+ VendorDp.Dp.Guid = VendorDpGuid;
+ VendorDp.VolumeSize = PrimVolDesc->VolSpaceSize;
+ VendorDp.Root = PrimVolDesc->Root;
+ MemCpy(VendorDp.VolumeLabel, PrimVolDesc->VolId, 32);
+ SET_NODE_LENGTH(&VendorDp.Dp.Header,sizeof(AMI_ISO9660_DEVICE_PATH));
+
+
+ // clear the data structure
+ gBS->SetMem(&DData, sizeof(PARTITION_DATA), 0);
+
+ // create new device path
+ DData.DevPath = DPAddNode(DevicePath, &(VendorDp.Dp.Header));
+
+ // save pertinent info
+ DData.Handle = NULL;
+ DData.ParentBlockIo = BlockIo;
+ DData.ParentDiskIo = DiskIo;
+ DData.StartingLba = 0;
+ DData.EndingLba = BlockIo->Media->LastBlock;
+
+ // Store Parent Handle
+ DData.ParentHandle = ControllerHandle;
+
+//***********************************************************************
+// End of ISO 9660 support
+//***********************************************************************
+
+ // Get the Volume Space Size from Primary Volume Descriptor,
+ // the 32-bit numerical value is stored in Both-Little and Big Endian
+ VolSize = VolDesc->VolSpaceSize[0];
+
+
+ // El Torito Spec says sector 17 contains the Boot Record
+ // Volume: Read and verify the data
+ Lba = CDROM_BOOT_REC_VOL_DESCRIPTOR_SECTOR;
+
+ Status = BlockIo->ReadBlocks( BlockIo, BlockIo->Media->MediaId, Lba,
+ BlockIo->Media->BlockSize, VolDesc );
+
+ if (EFI_ERROR(Status))
+ {
+ gBS->FreePool(VolDesc);
+ VolDesc = NULL;
+ goto EndOfEltorito;
+ }
+
+ // Validate the info in the Boot Record
+ if ((VolDesc->BootIndicator != 0) || ( MemCmp (VolDesc->IsoId, "CD001", 5)) ||
+ (VolDesc->Version != 1) || (MemCmp(VolDesc->Identifier, EL_TORITO_SPEC, 23) ) )
+ {
+ // not a valid boot Record
+ gBS->FreePool(VolDesc);
+ VolDesc = NULL;
+ goto EndOfEltorito;
+ }
+
+ // There is a valid boot record. move on to the Boot catalog
+ Lba = VolDesc->BootCatalog;
+
+ Status = gBS->AllocatePool(EfiBootServicesData, BlockIo->Media->BlockSize, &StartEntry);
+
+ if (EFI_ERROR(Status))
+ {
+ gBS->FreePool(VolDesc);
+ VolDesc = NULL;
+ goto EndOfEltorito;
+ }
+
+ // Now load the Boot Catalog and find all the partitions
+ BlockIo->ReadBlocks( BlockIo, BlockIo->Media->MediaId, Lba,
+ BlockIo->Media->BlockSize, StartEntry );
+
+ // get pointer to the first entry in the Boot Record
+ Entry = (EL_TORITO_ENTRIES *)StartEntry;
+
+ if ((Entry->ValEntry.HeaderId != 1) || (Entry->ValEntry.Sig != 0xaa55))
+ {
+ gBS->FreePool(VolDesc);
+ VolDesc = NULL;
+ gBS->FreePool(StartEntry);
+ StartEntry = NULL;
+ goto EndOfEltorito;
+ }
+
+ // Now Calculate checksum
+ Checksum = 0;
+ Temp = (UINT16 *)Entry;
+
+ for (Idx = 0; Idx < 16; Idx++)
+ Checksum += Temp[Idx];
+
+ // if the checksum is not 0 then the Boot catalog is considered invalid
+ if (Checksum)
+ {
+ gBS->FreePool(VolDesc);
+ VolDesc = NULL;
+ gBS->FreePool(StartEntry);
+ StartEntry = NULL;
+ goto EndOfEltorito;
+ }
+
+ // The checksum is zero so here we go
+
+ // Find and install the Boot entries
+ // loop through the boot catalog looking for bootable entries
+ // start at the second entry in the boot catalog,
+ // the first is the validation entry
+ Entry++;
+
+ for ( Idx = 0, BootEntry = 0; Idx < ((CDROM_BLOCK_SIZE/ sizeof(EL_TORITO_ENTRIES)) - 1);
+ Idx++, Entry++)
+ {
+ // if it isn't bootable, get next entry
+ if (Entry->DefaultEntry.BootId != CDROM_BOOTABLE)
+ continue;
+
+
+ BlockSize = BlockIo->Media->BlockSize;
+ if( (BlockSize == 0) || (BlockSize == 0xFFFFFFFF) ) {
+ BlockSize = 512;
+ }
+ TRACE((TRACE_DXE_CORE, "BlockSize is %d, MediaID is %d\n", BlockSize, BlockIo->Media->MediaId));
+
+ Sectors = Entry->DefaultEntry.SectorCount;
+ TRACE((TRACE_DXE_CORE, "Sector count is %d\n", Sectors));
+ TRACE((TRACE_DXE_CORE, "Media Type is %d\n", Entry->DefaultEntry.MediaType));
+
+ // use this switch to set the Partition Size
+ switch (Entry->DefaultEntry.MediaType)
+ {
+ case FLOPPY_144:
+ Sectors = FLOPPY_144_SIZE_LBA;
+ break;
+ case FLOPPY_288:
+ Sectors = FLOPPY_288_SIZE_LBA;
+ break;
+ case FLOPPY_12:
+ Sectors = FLOPPY_12_SIZE_LBA;
+ break;
+
+ case NO_EMULATION:
+ BlockSize = CDROM_BLOCK_SIZE;
+ break;
+
+ case HARD_DRIVE:
+ BlockSize = 512;
+ break;
+ default:
+ continue;
+ }
+
+
+ if ((Idx != 0) && (BootEntry == 0))
+ BootEntry++;
+
+ CdDp.BootEntry = (UINT32) BootEntry++;
+
+ CdDp.PartitionStart = Entry->DefaultEntry.LoadLba;
+
+ if (Sectors < 2)
+ CdDp.PartitionSize = (VolSize > BlockIo->Media->LastBlock + 1) ?
+ (UINT32)(BlockIo->Media->LastBlock - CdDp.PartitionStart + 1) :
+ (UINT32)(VolSize - CdDp.PartitionStart);
+
+ else
+ CdDp.PartitionSize = Div64(Sectors* BlockSize + BlockIo->Media->BlockSize - 1,
+ BlockIo->Media->BlockSize, &Dummy );
+
+ // set up the device path for the partition
+ CdDp.Header.Type = MEDIA_DEVICE_PATH;
+ CdDp.Header.SubType = MEDIA_CDROM_DP;
+ SET_NODE_LENGTH(&CdDp.Header,sizeof(CDROM_DEVICE_PATH));
+
+ // clear the data structure
+ gBS->SetMem(&PData, sizeof(PARTITION_DATA), 0);
+
+ // create new device path
+ PData.DevPath = DPAddNode(DevicePath, &CdDp.Header);
+
+ // save pertinent info
+ PData.Handle = NULL;
+ PData.ParentBlockIo = BlockIo;
+ PData.ParentDiskIo = DiskIo;
+ PData.StartingLba = CdDp.PartitionStart;
+ PData.EndingLba = CdDp.PartitionStart + CdDp.PartitionSize - 1;
+
+ // Store Parent Handle
+ PData.ParentHandle = ControllerHandle;
+
+ // This is a valid GPT partition: Add a child instance
+ Status = CreateChildHandle(This, &PData, BlockSize);
+ }
+
+EndOfEltorito:
+
+ if (VolDesc != NULL) gBS->FreePool(VolDesc);
+
+ if (StartEntry != NULL) gBS->FreePool(StartEntry);
+
+ if (Iso9660FileSystemSupportEnabled)
+ {
+ Status = CreateChildHandle(This, &DData, CDROM_BLOCK_SIZE);
+ }
+
+ return Status;
+}
+//**********************************************************************
+//**********************************************************************
+//** **
+//** (C)Copyright 1985-2009, American Megatrends, Inc. **
+//** **
+//** All Rights Reserved. **
+//** **
+//** 5555 Oakbrook Parkway, Suite 200, Norcross, GA 30093 **
+//** **
+//** Phone: (770)-246-8600 **
+//** **
+//**********************************************************************
+//**********************************************************************
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