public static void Init()
{
mFs = new List <ATAPartition>(10);
for (int i = 0; i < ATA.ATAPartitions.Count; i++)
{
if (ATA.ATAPartitions[i] is ATAPartition)
{
ATAPartition part = ATA.ATAPartitions[i];
ReadBiosParamBlock(part, part.offset);
}
}
UpdateVFS();
}
private static void ReadBiosParamBlock(ATAPartition hd, ulong paritionOffset)
{
BiosParameterBlock *bpb = (BiosParameterBlock *)Heap.alloc((uint)sizeof(BiosParameterBlock));
hd.host.ReadBlock(paritionOffset, 1, (byte *)(uint)bpb);
ulong fatStart = paritionOffset + bpb->reservedSectors;
ulong fatSize = bpb->tableSize;
ulong dataStart = fatStart + fatSize * bpb->fatCopies;
ulong rootStart = dataStart + bpb->sectorsPerCluster * (bpb->rootCluster - 2);
if (rootStart == 0)
{
Heap.free((byte *)(uint)bpb);
return;
}
hd.mountPoint = nextMountPoint;
nextMountPoint++;
hd.fatStart = fatStart;
hd.fatSize = fatSize;
hd.dataStart = dataStart;
hd.rootStart = rootStart;
hd.sectorsPerCluster = bpb->sectorsPerCluster;
mFs.Add(hd);
FATDirectoryEntry *dirent = (FATDirectoryEntry *)Heap.alloc((uint)sizeof(FATDirectoryEntry) * 16);
hd.host.ReadBlock(rootStart, 1, (byte *)(uint)dirent);
hd.rootName = (byte *)Heap.alloc(8);
Utils.memcpy(hd.rootName, (byte *)dirent, 8);
Utils.strDepad(hd.rootName, 8);
if (filesystem_root_node == null)
{
FSEntry entry = new FSEntry();
entry.address = rootStart;
entry.name = (byte *)Heap.alloc(8);
entry.host = hd;
filesystem_root_node = entry;
}
Heap.free((byte *)(uint)dirent);
Heap.free((byte *)(uint)bpb);
}
