X-Git-Url: https://git.wirehaze.ovh/BOS.git/blobdiff_plain/ea099b71fc66316e95955e5400a6a3a1cc4ff4f0..b5b056db13eacb2c7b58a1c8d6d97daf23ce5210:/kernel/vfs/vfs.asm?ds=inline

diff --git a/kernel/vfs/vfs.asm b/kernel/vfs/vfs.asm
index ff661fd..3742be6 100644
--- a/kernel/vfs/vfs.asm
+++ b/kernel/vfs/vfs.asm
@@ -2,12 +2,128 @@
 ; BOS kernel                Christoffer Bubach, 2012-2015. ;
 ;----------------------------------------------------------;
 ;                                                          ;
-;        VFS  handling all devices and filesystems.        ;
+;        VFS handling all devices and filesystems.         ;
 ;                                                          ;
 ;----------------------------------------------------------;
 
+    ;---------------------------------------------;
+    ;   VFS main structure                        ;
+    ;---------------------------------------------;
+    struc VFS
+    {
+        .number:                times 255      db 0   ; 00=FD, 0x10=HD, 0x60=CD, 0x80=VD, 90=RD, B0=ND
+        .storage:
+            times 255 * sizeof.VFS_storage     db 0   ; storage driver structure
+        .filesystem:          
+            times 255 * sizeof.VFS_filesystem  db 0   ; filesystem driver structure
+    }
+
+    virtual at 0                                      ; could use "at esi" instead
+        VFS VFS
+        sizeof.VFS = $-$$     
+    end virtual
+
+    ;---------------------------------------------;
+    ;   VFS storage driver structure              ;
+    ;---------------------------------------------;
+    struc VFS_storage
+    {
+        .data_pointer         dd  0                   ; internal driver data
+        .init                 dd  0                   ; pointer to init
+        .deinit               dd  0                   ; remove driver
+        .read                 dd  0                   ; read device
+        .write                dd  0                   ; write device
+        .ioctl                dd  0                   ; handle device specific extras
+    }
+
+    virtual at 0
+        VFS_storage VFS_storage
+        sizeof.VFS_storage = $-$$
+    end virtual
+
+    ;---------------------------------------------;
+    ;   VFS filesystem structure                  ;
+    ;---------------------------------------------;
+    struc VFS_filesystem
+    {
+        .data_pointer         dd  0                   ; internal driver data
+        .init                 dd  0                   ; pointer to init
+        .deinit               dd  0                   ; remove driver
+        .format               dd  0                   ; format drive
+        .mount                dd  0                   ; mount drive
+        .unmount              dd  0                   ; unmount drive
+        .find                 dd  0                   ; find file
+        .findnext             dd  0                   ; get next match
+        .open                 dd  0                   ; open file, get handle
+        .read                 dd  0                   ; read file from handle
+        .write                dd  0                   ; write file from handle
+        .seek                 dd  0                   ; seek from handle
+        .remove               dd  0                   ; remove file/dir
+        .create               dd  0                   ; create file/dir
+        .ioctl                dd  0                   ; extra calls if exists
+    }
+
+    virtual at 0
+        VFS_filesystem VFS_filesystem
+        sizeof.VFS_filesystem = $-$$
+    end virtual
+
+
+    VFS_structure             dd 0
+
+;--------------------------------------------------------------;
+;   init_vfs  -  detect connected drives                       ;
+;--------------------------------------------------------------;
+;                                                              ;
+;       in:  reg = pointer to VFS drive info                   ;
+;                                                              ;
+;       out: reg = pointer to struct(s) if FAT12 found         ;
+;                                                              ;
+;--------------------------------------------------------------;
 init_vfs:
         push   eax
-        ; a bit more code here 
+        push   ebx
+
+        mov    ebx, sizeof.VFS                        ; allocate structure size
+        call   allocate_mem
+        cmp    eax, 0
+        jne    .ok
+        stc                                           ; if error, set carry
+        mov    ebx, 0
+
+    .ok:
+        mov    dword [VFS_structure], ebx
+
+        pop    ebx
+        pop    eax
+        ret
+
+;--------------------------------------------------------------;
+;   add_media  -  add media driver                             ;
+;--------------------------------------------------------------;
+;                                                              ;
+;       in:  reg = pointer to VFS drive info                   ;
+;                                                              ;
+;       out: reg = pointer to struct(s) if FAT12 found         ;
+;                                                              ;
+;--------------------------------------------------------------;
+add_media:
+        push   eax
+        ;...
+        pop    eax
+        ret
+
+;--------------------------------------------------------------;
+;   add_fs  -  add filesystem driver                           ;
+;--------------------------------------------------------------;
+;                                                              ;
+;       in:  reg = pointer to VFS drive info                   ;
+;                                                              ;
+;       out: reg = pointer to struct(s) if FAT12 found         ;
+;                                                              ;
+;--------------------------------------------------------------;
+add_fs:
+        push   eax
+        ;...
         pop    eax
         ret
\ No newline at end of file