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Rev 3296 Rev 3742
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;;                                                              ;;
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;;                                                              ;;
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;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 3742 $
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$Revision: 3296 $
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read_ramdisk:
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; READ RAMDISK IMAGE FROM HD
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        cmp     [boot_dev+OS_BASE+0x10000], 1
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        jne     no_sys_on_hd
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; READ RAMDISK IMAGE FROM HD
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 - 
 
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        test    [DRIVE_DATA+1], byte 0x40
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        jz      position_2
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        mov     [hdbase], 0x1f0
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        cmp     [boot_dev+OS_BASE+0x10000], 1
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        mov     [hdid], 0x0
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        mov     [hdpos], 1
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        jne     no_sys_on_hd
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        mov     [fat32part], 0
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  position_1_1:
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        inc     [fat32part]
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        xor     ebp, ebp
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        call    search_and_read_image
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        cmp     [image_retrieved], 1
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        je      yes_sys_on_hd
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        movzx   eax, byte [DRIVE_DATA+2]
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.hd_loop:
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        cmp     [fat32part], eax
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        jle     position_1_1
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        lea     eax, [ebp+'0']
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  position_2:
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        mov     [read_image_fsinfo.name_digit], al
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        test    [DRIVE_DATA+1], byte 0x10
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        jz      position_3
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        movzx   eax, byte [DRIVE_DATA+2+ebp]
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        mov     [hdbase], 0x1f0
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        mov     [hdid], 0x10
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        mov     [hdpos], 2
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        mov     [fat32part], 0
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  position_2_1:
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        inc     [fat32part]
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        test    eax, eax
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        call    search_and_read_image
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        jz      .next_hd
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        cmp     [image_retrieved], 1
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        push    eax
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        je      yes_sys_on_hd
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        movzx   eax, byte [DRIVE_DATA+3]
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        cmp     eax, [fat32part]
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        mov     esi, 1
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        jle     position_2_1
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.partition_loop:
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  position_3:
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        mov     eax, esi
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        test    [DRIVE_DATA+1], byte 0x4
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        jz      position_4
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        mov     [hdbase], 0x170
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        push    -'0'
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        mov     [hdid], 0x0
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        mov     [hdpos], 3
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        mov     [fat32part], 0
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@@:
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  position_3_1:
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        inc     [fat32part]
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        xor     edx, edx
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        call    search_and_read_image
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        cmp     [image_retrieved], 1
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        div     [_10]
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        je      yes_sys_on_hd
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        movzx   eax, byte [DRIVE_DATA+4]
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        cmp     eax, [fat32part]
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        push    edx
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        jle     position_3_1
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        test    eax, eax
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  position_4:
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        jnz     @b
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        test    [DRIVE_DATA+1], byte 0x1
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        jz      no_sys_on_hd
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        mov     [hdbase], 0x170
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        mov     edi, read_image_fsinfo.partition
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        mov     [hdid], 0x10
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        mov     [hdpos], 4
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        mov     [fat32part], 0
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  position_4_1:
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@@:
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        inc     [fat32part]
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        call    search_and_read_image
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        pop     eax
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        cmp     [image_retrieved], 1
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        add     al, '0'
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        je      yes_sys_on_hd
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        movzx   eax, byte [DRIVE_DATA+5]
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        cmp     eax, [fat32part]
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        stosb
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        jle     position_4_1
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        jnz     @b
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        jmp     yes_sys_on_hd
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        mov     byte [edi-1], '/'
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        push    esi edi
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        mov     esi, bootpath1
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        mov     ecx, bootpath1.len
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  search_and_read_image:
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        rep movsb
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        call    read_image
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        test    eax, eax
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        call    set_FAT32_variables
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        jz      .yes
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        cmp     eax, 6
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        jz      .yes
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        mov     edx, bootpath
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        pop     edi
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        call    read_image
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        push    edi
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        mov     esi, bootpath2
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        mov     ecx, bootpath2.len
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        test    eax, eax
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        rep movsb
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        call    read_image
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        jz      image_present
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        test    eax, eax
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        mov     edx, bootpath2
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        jz      .yes
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        call    read_image
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        cmp     eax, 6
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        jz      .yes
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        pop     edi esi
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        test    eax, eax
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        inc     esi
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        cmp     esi, [esp]
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        jbe     .partition_loop
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        pop     eax
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.next_hd:
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        inc     ebp
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        cmp     ebp, 4
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        jz      image_present
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        jb      .hd_loop
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        ret
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        jmp     no_sys_on_hd
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    image_present:
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.yes:
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        mov     [image_retrieved], 1
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        pop     edi esi eax
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        ret
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        jmp     yes_sys_on_hd
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iglobal
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iglobal
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align 4
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read_image_fsinfo:
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align 4
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        dd      0               ; function: read
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        dq      0               ; offset: zero
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        dd      1474560/512     ; size
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        dd      RAMDISK         ; buffer
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        db      '/hd'
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.name_digit db  '0'
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read_image_fsinfo:
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        db      '/'
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.partition:
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        dd      0               ; function: read
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        rb      64      ; should be enough for '255/KOLIBRI/KOLIBRI.IMG'
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        dq      0               ; offset: zero
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        dd      1474560/512     ; size
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bootpath1       db      'KOLIBRI.IMG',0
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        dd      RAMDISK         ; buffer
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.len = $ - bootpath1
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        db      0
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bootpath2       db      'KOLIBRI/KOLIBRI.IMG',0
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        dd      hdsysimage+OS_BASE+0x10000
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.len = $ - bootpath2
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endg
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endg
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read_image:
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        mov     ebx, read_image_fsinfo
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        pushad
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read_image:
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        call    file_system_lfn_protected
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        mov     ebx, read_image_fsinfo
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        popad
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        pushad
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        ret
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        call    file_system_lfn_protected