working storage system

compile_sources.sh

@@ -4,4 +4,4 @@ echo "======================="
 echo " "
 echo "Compiling FPC Sources..."
 echo " "
-fpc -Aelf -gw -n -O3 -Op3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/storage/* -Fusrc/driver/storage/AHCI/* -Fusrc/driver/* -Fusrc/driver/net/*  src/kernel.pas
+fpc -Aelf -gw -n -O3 -Op3 -Si -Sc -Sg -Xd -CX -XXs -CfSSE -CfSSE2 -Rintel -Pi386 -Tlinux -FElib/ -Fusrc/* -Fusrc/driver/storage/* -Fusrc/driver/storage/AHCI/* -Fusrc/driver/* -Fusrc/driver/net/* -Fusrc/prog/*  src/kernel.pas

iso/hello.txt

@@ -0,0 +1 @@
+Hello from the Asuro ISO!

src/driver/storage/AHCI/AHCITypes.pas

@@ -20,15 +20,15 @@
 unit AHCITypes;
 interface
 uses
-    util,
-    PCI,
-    drivertypes,
-    drivermanagement,
-    lmemorymanager,
     console,
-    vmemorymanager,
+    drivermanagement,
+    drivertypes,
     idetypes,
-    lists;
+    lists,
+    lmemorymanager,
+    PCI,
+    util,
+    vmemorymanager;
 
 const
     AHCI_CONTROLLER_MODE = $80000000;

src/driver/storage/Filesystems/asfs.pas

@@ -23,14 +23,15 @@ interface
 
 uses
     console,
-    storagemanagement,
-    util, terminal,
-    lmemorymanager,
-    strings,
     lists,
-    tracer,
+    lmemorymanager,
+    rtc,
     serial,
-    rtc;
+    storagemanagement,
+    strings,
+    terminal,
+    tracer,
+    util;
 
 type
 

src/driver/storage/Filesystems/filesystemmanager.pas

@@ -0,0 +1,120 @@
+{
+    Driver->Storage->FilesystemManager - Filesystem driver registry and routing.
+
+    Filesystem drivers (FAT32, FlatFS, etc.) register themselves here.
+    When VolumeManager discovers a volume, FilesystemManager probes it
+    against all registered filesystem drivers to detect the filesystem type.
+
+    @author(Aaron Hance <[email protected]>)
+}
+unit filesystemmanager;
+
+interface
+
+uses
+    lists,
+    lmemorymanager,
+    storagetypes,
+    strings,
+    tracer,
+    util;
+
+var
+    filesystems : PLinkedListBase;
+
+procedure init();
+procedure register_filesystem(filesystem : PFilesystem);
+function get_filesystem_count() : uint32;
+function get_filesystem(index : uint32) : PFilesystem;
+function find_filesystem_by_name(name : pchar) : PFilesystem;
+function find_filesystem_by_id(system_id : uint8) : PFilesystem;
+procedure probe_volume(volume : PStorage_Volume);
+
+implementation
+
+procedure init();
+begin
+    push_trace('FilesystemManager.init');
+    filesystems := LL_New(sizeof(TFilesystem));
+end;
+
+procedure register_filesystem(filesystem : PFilesystem);
+var
+    elm : void;
+begin
+    push_trace('FilesystemManager.register_filesystem');
+
+    elm := LL_Add(filesystems);
+    memcpy(uint32(filesystem), uint32(elm), sizeof(TFilesystem));
+end;
+
+function get_filesystem_count() : uint32;
+begin
+    get_filesystem_count := LL_Size(filesystems);
+end;
+
+function get_filesystem(index : uint32) : PFilesystem;
+begin
+    if index < LL_Size(filesystems) then
+        get_filesystem := PFilesystem(LL_Get(filesystems, index))
+    else
+        get_filesystem := nil;
+end;
+
+function find_filesystem_by_name(name : pchar) : PFilesystem;
+var
+    i  : uint32;
+    fs : PFilesystem;
+begin
+    push_trace('FilesystemManager.find_filesystem_by_name');
+    find_filesystem_by_name := nil;
+
+    for i := 0 to LL_Size(filesystems) - 1 do begin
+        fs := PFilesystem(LL_Get(filesystems, i));
+        if stringEquals(fs^.sName, name) then begin
+            find_filesystem_by_name := fs;
+            exit;
+        end;
+    end;
+end;
+
+function find_filesystem_by_id(system_id : uint8) : PFilesystem;
+var
+    i  : uint32;
+    fs : PFilesystem;
+begin
+    push_trace('FilesystemManager.find_filesystem_by_id');
+    find_filesystem_by_id := nil;
+
+    for i := 0 to LL_Size(filesystems) - 1 do begin
+        fs := PFilesystem(LL_Get(filesystems, i));
+        if fs^.system_id = system_id then begin
+            find_filesystem_by_id := fs;
+            exit;
+        end;
+    end;
+end;
+
+procedure probe_volume(volume : PStorage_Volume);
+var
+    i  : uint32;
+    fs : PFilesystem;
+begin
+    push_trace('FilesystemManager.probe_volume.enter');
+
+    { Try each registered filesystem's identify callback against this volume }
+    for i := 0 to LL_Size(filesystems) - 1 do begin
+        fs := PFilesystem(LL_Get(filesystems, i));
+        if fs^.identifyCallback <> nil then begin
+            push_trace('FilesystemManager.probe_volume.tryFS');
+            if fs^.identifyCallback(volume) then begin
+                volume^.filesystem := fs;
+                push_trace('FilesystemManager.probe_volume.found');
+                exit;
+            end;
+        end;
+    end;
+    push_trace('FilesystemManager.probe_volume.exit');
+end;
+
+end.

src/driver/storage/IDE/idetypes.pas

@@ -109,7 +109,7 @@ type
         base    : uint16;
         ctrl    : uint16;
         bmide   : uint16;
-        noInter : uint8
+        noInter : uint8;
     end;
 
     TIDE_Status = bitpacked record 
@@ -122,6 +122,7 @@ type
         IDDEX : Boolean;
         ERROR : Boolean;
     end;
+    
     PIDE_Status = ^TIDE_Status;
 
     TIDE_Device = record

src/driver/storage/MBR.pas

@@ -44,8 +44,27 @@ implementation
 function LBA_2_CHS(lba : uint32) : T24bit;
 var
     dat : T24bit;
+    cylinder, head, sector : uint16;
+    sectors_per_track : uint16;
+    heads_per_cylinder : uint16;
 begin
-  //TODO impliment procedure
+    // Standard CHS geometry values
+    sectors_per_track := 63;
+    heads_per_cylinder := 255;
+    
+    // Calculate CHS values from LBA
+    sector := (lba mod sectors_per_track) + 1;  // Sectors are 1-indexed
+    head := (lba div sectors_per_track) mod heads_per_cylinder;
+    cylinder := (lba div sectors_per_track) div heads_per_cylinder;
+    
+    // Pack into MBR CHS format (3 bytes):
+    // Byte 0: Head (8 bits)
+    // Byte 1: Sector (bits 0-5) | Cylinder high 2 bits (bits 6-7)
+    // Byte 2: Cylinder low 8 bits
+    dat[0] := head;
+    dat[1] := (sector and $3F) or ((cylinder shr 8) shl 6);
+    dat[2] := (cylinder and $FF);
+    
     LBA_2_CHS := dat;
 end;