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Rev 3555 Rev 3626
Line 333... Line 333...
333 
; The handle is the pointer to the internal structure DISK.
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; The handle is the pointer to the internal structure DISK.
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disk_add:
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disk_add:
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        push    ebx esi         ; save used registers to be stdcall
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        push    ebx esi         ; save used registers to be stdcall
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; 1. Allocate the DISK structure.
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; 1. Allocate the DISK structure.
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; 1a. Call the heap manager.
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; 1a. Call the heap manager.
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        push    sizeof.DISK
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        movi    eax, sizeof.DISK
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        pop     eax
 - 
 
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        call    malloc
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        call    malloc
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; 1b. Check the result. If allocation failed, return (go to 9) with eax = 0.
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; 1b. Check the result. If allocation failed, return (go to 9) with eax = 0.
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        test    eax, eax
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        test    eax, eax
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        jz      .nothing
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        jz      .nothing
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; 2. Copy the disk name to the DISK structure.
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; 2. Copy the disk name to the DISK structure.
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; 5. Driver does not implement the required function; use default implementation.
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; 5. Driver does not implement the required function; use default implementation.
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        jmp     dword [disk_default_callbacks+eax-4]
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        jmp     dword [disk_default_callbacks+eax-4]
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; The default implementation of DISKFUNC.querymedia.
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; The default implementation of DISKFUNC.querymedia.
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disk_default_querymedia:
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disk_default_querymedia:
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        push    DISK_STATUS_INVALID_CALL
 - 
 
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        pop     eax
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        movi    eax, DISK_STATUS_INVALID_CALL
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        ret     8
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        ret     8
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; The default implementation of DISKFUNC.read and DISKFUNC.write.
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; The default implementation of DISKFUNC.read and DISKFUNC.write.
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disk_default_read:
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disk_default_read:
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disk_default_write:
 - 
 
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        push    DISK_STATUS_INVALID_CALL
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disk_default_write:
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        pop     eax
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        movi    eax, DISK_STATUS_INVALID_CALL
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        ret     20
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        ret     20
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        call    fat_create_partition
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        call    fat_create_partition
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        test    eax, eax
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        test    eax, eax
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        jnz     .success
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        jnz     .success
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; 3. No file system has recognized the volume, so just allocate the PARTITION
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; 3. No file system has recognized the volume, so just allocate the PARTITION
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; structure without extra fields.
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; structure without extra fields.
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        push    sizeof.PARTITION
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        movi    eax, sizeof.PARTITION
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        pop     eax
 - 
 
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        call    malloc
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        call    malloc
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        test    eax, eax
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        test    eax, eax
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        jz      .nothing
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        jz      .nothing
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        mov     edx, dword [.start]
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        mov     edx, dword [.start]
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        mov     dword [eax+PARTITION.FirstSector], edx
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        mov     dword [eax+PARTITION.FirstSector], edx