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path: root/FatPkg/FatPei/Eltorito.c
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Diffstat (limited to 'FatPkg/FatPei/Eltorito.c')
-rw-r--r--FatPkg/FatPei/Eltorito.c166
1 files changed, 85 insertions, 81 deletions
diff --git a/FatPkg/FatPei/Eltorito.c b/FatPkg/FatPei/Eltorito.c
index 5fe0cb454e..d35768e6ef 100644
--- a/FatPkg/FatPei/Eltorito.c
+++ b/FatPkg/FatPei/Eltorito.c
@@ -25,33 +25,33 @@ SPDX-License-Identifier: BSD-2-Clause-Patent
**/
BOOLEAN
FatFindEltoritoPartitions (
- IN PEI_FAT_PRIVATE_DATA *PrivateData,
- IN UINTN ParentBlockDevNo
+ 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;
+ 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;
+ Found = FALSE;
+ ParentBlockDev = &(PrivateData->BlockDevice[ParentBlockDevNo]);
+ VolSpaceSize = 0;
//
// CD_ROM has the fixed block size as 2048 bytes
@@ -60,8 +60,8 @@ FatFindEltoritoPartitions (
return FALSE;
}
- VolDescriptor = (CDROM_VOLUME_DESCRIPTOR *) PrivateData->BlockData;
- Catalog = (ELTORITO_CATALOG *) VolDescriptor;
+ VolDescriptor = (CDROM_VOLUME_DESCRIPTOR *)PrivateData->BlockData;
+ Catalog = (ELTORITO_CATALOG *)VolDescriptor;
//
// the ISO-9660 volume descriptor starts at 32k on the media
@@ -74,7 +74,6 @@ FatFindEltoritoPartitions (
// Loop: handle one volume descriptor per time
//
while (TRUE) {
-
VolDescriptorLba += 1;
if (VolDescriptorLba > ParentBlockDev->LastBlock) {
//
@@ -84,32 +83,36 @@ FatFindEltoritoPartitions (
}
Status = FatReadBlock (
- PrivateData,
- ParentBlockDevNo,
- VolDescriptorLba,
- ParentBlockDev->BlockSize,
- VolDescriptor
- );
+ 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
- ) {
+ 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?
//
@@ -117,9 +120,11 @@ FatFindEltoritoPartitions (
VolDescriptor->BootRecordVolume.SystemId,
CDVOL_ELTORITO_ID,
sizeof (CDVOL_ELTORITO_ID) - 1
- ) != 0) {
+ ) != 0)
+ {
continue;
}
+
//
// Read in the boot El Torito boot catalog
//
@@ -129,25 +134,26 @@ FatFindEltoritoPartitions (
}
Status = FatReadBlock (
- PrivateData,
- ParentBlockDevNo,
- Lba,
- ParentBlockDev->BlockSize,
- Catalog
- );
+ 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) {
+ if ((Catalog->Catalog.Indicator != ELTORITO_ID_CATALOG) || (Catalog->Catalog.Id55AA != 0xAA55)) {
continue;
}
Check = 0;
- CheckBuffer = (UINT16 *) Catalog;
+ CheckBuffer = (UINT16 *)Catalog;
for (Index = 0; Index < sizeof (ELTORITO_CATALOG) / sizeof (UINT16); Index += 1) {
Check += CheckBuffer[Index];
}
@@ -166,60 +172,59 @@ FatFindEltoritoPartitions (
//
// Check this entry
//
- if (Catalog->Boot.Indicator != ELTORITO_ID_SECTION_BOOTABLE || Catalog->Boot.Lba == 0) {
+ if ((Catalog->Boot.Indicator != ELTORITO_ID_SECTION_BOOTABLE) || (Catalog->Boot.Lba == 0)) {
continue;
}
- SubBlockSize = 512;
- SectorCount = Catalog->Boot.SectorCount;
+ 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;
+ 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);
+ 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;
- Found = TRUE;
-
- BlockDev = &(PrivateData->BlockDevice[PrivateData->BlockDeviceCount]);
+ 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;
+ 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++;
}
@@ -229,5 +234,4 @@ FatFindEltoritoPartitions (
ParentBlockDev->PartitionChecked = TRUE;
return Found;
-
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-14 17:43:54 +0000