mirror of https://github.com/acidanthera/audk.git
276 lines
8.7 KiB
C
276 lines
8.7 KiB
C
/** @file
|
|
Decode an El Torito formatted CD-ROM
|
|
|
|
Copyright (c) 2018 Qualcomm Datacenter Technologies, Inc.
|
|
Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR>
|
|
SPDX-License-Identifier: BSD-2-Clause-Patent
|
|
|
|
**/
|
|
|
|
|
|
#include "Partition.h"
|
|
|
|
|
|
/**
|
|
Install child handles if the Handle supports El Torito format.
|
|
|
|
@param[in] This Calling context.
|
|
@param[in] Handle Parent Handle.
|
|
@param[in] DiskIo Parent DiskIo interface.
|
|
@param[in] DiskIo2 Parent DiskIo2 interface.
|
|
@param[in] BlockIo Parent BlockIo interface.
|
|
@param[in] BlockIo2 Parent BlockIo2 interface.
|
|
@param[in] DevicePath Parent Device Path
|
|
|
|
|
|
@retval EFI_SUCCESS Child handle(s) was added.
|
|
@retval EFI_MEDIA_CHANGED Media changed Detected.
|
|
@retval other no child handle was added.
|
|
|
|
**/
|
|
EFI_STATUS
|
|
PartitionInstallElToritoChildHandles (
|
|
IN EFI_DRIVER_BINDING_PROTOCOL *This,
|
|
IN EFI_HANDLE Handle,
|
|
IN EFI_DISK_IO_PROTOCOL *DiskIo,
|
|
IN EFI_DISK_IO2_PROTOCOL *DiskIo2,
|
|
IN EFI_BLOCK_IO_PROTOCOL *BlockIo,
|
|
IN EFI_BLOCK_IO2_PROTOCOL *BlockIo2,
|
|
IN EFI_DEVICE_PATH_PROTOCOL *DevicePath
|
|
)
|
|
{
|
|
EFI_STATUS Status;
|
|
UINT64 VolDescriptorOffset;
|
|
UINT32 Lba2KB;
|
|
EFI_BLOCK_IO_MEDIA *Media;
|
|
CDROM_VOLUME_DESCRIPTOR *VolDescriptor;
|
|
ELTORITO_CATALOG *Catalog;
|
|
UINTN Check;
|
|
UINTN Index;
|
|
UINTN BootEntry;
|
|
UINTN MaxIndex;
|
|
UINT16 *CheckBuffer;
|
|
CDROM_DEVICE_PATH CdDev;
|
|
UINT32 SubBlockSize;
|
|
UINT32 SectorCount;
|
|
EFI_STATUS Found;
|
|
UINT32 VolSpaceSize;
|
|
EFI_PARTITION_INFO_PROTOCOL PartitionInfo;
|
|
|
|
Found = EFI_NOT_FOUND;
|
|
Media = BlockIo->Media;
|
|
|
|
VolSpaceSize = 0;
|
|
|
|
//
|
|
// CD_ROM has the fixed block size as 2048 bytes (SIZE_2KB)
|
|
//
|
|
|
|
// If the ISO image has been copied onto a different storage media
|
|
// then the block size might be different (eg: USB).
|
|
// Ensure 2048 (SIZE_2KB) is a multiple of block size
|
|
if (((SIZE_2KB % Media->BlockSize) != 0) || (Media->BlockSize > SIZE_2KB)) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
VolDescriptor = AllocatePool ((UINTN)SIZE_2KB);
|
|
|
|
if (VolDescriptor == NULL) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
|
|
Catalog = (ELTORITO_CATALOG *) VolDescriptor;
|
|
|
|
//
|
|
// Loop: handle one volume descriptor per time
|
|
// The ISO-9660 volume descriptor starts at 32k on the media
|
|
//
|
|
for (VolDescriptorOffset = SIZE_32KB;
|
|
VolDescriptorOffset <= MultU64x32 (Media->LastBlock, Media->BlockSize);
|
|
VolDescriptorOffset += SIZE_2KB) {
|
|
Status = DiskIo->ReadDisk (
|
|
DiskIo,
|
|
Media->MediaId,
|
|
VolDescriptorOffset,
|
|
SIZE_2KB,
|
|
VolDescriptor
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
Found = 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,
|
|
// the 32-bit numerical values is stored in Both-byte orders
|
|
//
|
|
if (VolDescriptor->PrimaryVolume.Type == CDVOL_TYPE_CODED) {
|
|
VolSpaceSize = VolDescriptor->PrimaryVolume.VolSpaceSize[0];
|
|
}
|
|
//
|
|
// 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
|
|
// The LBA unit used by El Torito boot catalog is 2KB unit
|
|
//
|
|
Lba2KB = UNPACK_INT32 (VolDescriptor->BootRecordVolume.EltCatalog);
|
|
// Ensure the LBA (in 2KB unit) fits into our media
|
|
if (Lba2KB * (SIZE_2KB / Media->BlockSize) > Media->LastBlock) {
|
|
continue;
|
|
}
|
|
|
|
Status = DiskIo->ReadDisk (
|
|
DiskIo,
|
|
Media->MediaId,
|
|
MultU64x32 (Lba2KB, SIZE_2KB),
|
|
SIZE_2KB,
|
|
Catalog
|
|
);
|
|
if (EFI_ERROR (Status)) {
|
|
DEBUG ((EFI_D_ERROR, "EltCheckDevice: error reading catalog %r\n", 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) {
|
|
DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header IDs not correct\n"));
|
|
continue;
|
|
}
|
|
|
|
Check = 0;
|
|
CheckBuffer = (UINT16 *) Catalog;
|
|
for (Index = 0; Index < sizeof (ELTORITO_CATALOG) / sizeof (UINT16); Index += 1) {
|
|
Check += CheckBuffer[Index];
|
|
}
|
|
|
|
if ((Check & 0xFFFF) != 0) {
|
|
DEBUG ((EFI_D_ERROR, "EltCheckBootCatalog: El Torito boot catalog header checksum failed\n"));
|
|
continue;
|
|
}
|
|
|
|
MaxIndex = Media->BlockSize / sizeof (ELTORITO_CATALOG);
|
|
for (Index = 1, BootEntry = 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 = Media->BlockSize;
|
|
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:
|
|
DEBUG ((EFI_D_INIT, "EltCheckDevice: unsupported El Torito boot media type %x\n", Catalog->Boot.MediaType));
|
|
SectorCount = 0;
|
|
SubBlockSize = Media->BlockSize;
|
|
break;
|
|
}
|
|
//
|
|
// Create child device handle
|
|
//
|
|
CdDev.Header.Type = MEDIA_DEVICE_PATH;
|
|
CdDev.Header.SubType = MEDIA_CDROM_DP;
|
|
SetDevicePathNodeLength (&CdDev.Header, sizeof (CdDev));
|
|
|
|
if (Index == 1) {
|
|
//
|
|
// This is the initial/default entry
|
|
//
|
|
BootEntry = 0;
|
|
}
|
|
|
|
CdDev.BootEntry = (UINT32) BootEntry;
|
|
BootEntry++;
|
|
CdDev.PartitionStart = Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize);
|
|
if (SectorCount < 2) {
|
|
//
|
|
// When the SectorCount < 2, set the Partition as the whole CD.
|
|
//
|
|
if (VolSpaceSize * (SIZE_2KB / Media->BlockSize) > (Media->LastBlock + 1)) {
|
|
CdDev.PartitionSize = (UINT32)(Media->LastBlock - Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + 1);
|
|
} else {
|
|
CdDev.PartitionSize = (UINT32)(VolSpaceSize - Catalog->Boot.Lba) * (SIZE_2KB / Media->BlockSize);
|
|
}
|
|
} else {
|
|
CdDev.PartitionSize = DivU64x32 (
|
|
MultU64x32 (
|
|
SectorCount * (SIZE_2KB / Media->BlockSize),
|
|
SubBlockSize
|
|
) + Media->BlockSize - 1,
|
|
Media->BlockSize
|
|
);
|
|
}
|
|
|
|
ZeroMem (&PartitionInfo, sizeof (EFI_PARTITION_INFO_PROTOCOL));
|
|
PartitionInfo.Revision = EFI_PARTITION_INFO_PROTOCOL_REVISION;
|
|
PartitionInfo.Type = PARTITION_TYPE_OTHER;
|
|
|
|
Status = PartitionInstallChildHandle (
|
|
This,
|
|
Handle,
|
|
DiskIo,
|
|
DiskIo2,
|
|
BlockIo,
|
|
BlockIo2,
|
|
DevicePath,
|
|
(EFI_DEVICE_PATH_PROTOCOL *) &CdDev,
|
|
&PartitionInfo,
|
|
Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize),
|
|
Catalog->Boot.Lba * (SIZE_2KB / Media->BlockSize) + CdDev.PartitionSize - 1,
|
|
SubBlockSize,
|
|
NULL
|
|
);
|
|
if (!EFI_ERROR (Status)) {
|
|
Found = EFI_SUCCESS;
|
|
}
|
|
}
|
|
}
|
|
|
|
FreePool (VolDescriptor);
|
|
|
|
return Found;
|
|
}
|