Subversion Repositories Kolibri OS

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;;                                                              ;;

;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;

;; Distributed under terms of the GNU General Public License    ;;

;;                                                              ;;

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$Revision: 5565 $

read_ramdisk:

; READ RAMDISK IMAGE FROM HD (only for IDE0, IDE1, IDE2, IDE3)

        cmp     [boot_dev+OS_BASE+0x10000], 1

        jne     no_sys_on_hd.1

        xor     ebp, ebp

.hd_loop:

        lea     eax, [ebp+'0']

        mov     [read_image_fsinfo.name_digit], al

        movzx   eax, byte [DRIVE_DATA+2+ebp]

        test    eax, eax

        jz      .next_hd

        push    eax

        mov     esi, 1

.partition_loop:

        mov     eax, esi

        push    -'0'

@@:

        xor     edx, edx

        div     [_10]

        push    edx

        test    eax, eax

        jnz     @b

        mov     edi, read_image_fsinfo.partition

@@:

        pop     eax

        add     al, '0'

        stosb

        jnz     @b

        mov     byte [edi-1], '/'

        push    esi edi

        mov     esi, bootpath1

        mov     ecx, bootpath1.len

        rep movsb

        call    read_image

        test    eax, eax

        jz      .yes

        cmp     eax, 6

        jz      .yes

        pop     edi

        push    edi

        mov     esi, bootpath2

        mov     ecx, bootpath2.len

        rep movsb

        call    read_image

        test    eax, eax

        jz      .yes

        cmp     eax, 6

        jz      .yes

        pop     edi esi

        inc     esi

        cmp     esi, [esp]

        jbe     .partition_loop

        pop     eax

.next_hd:

        inc     ebp

        cmp     ebp, 4

        jb      .hd_loop

        jmp     no_sys_on_hd

.yes:

        DEBUGF 1, "K : RD found: %s\n", read_image_fsinfo.name

        pop     edi esi eax

        call    register_ramdisk

        jmp     yes_sys_on_hd

;-----------------------------------------------------------------------------

; Register ramdisk file system

register_ramdisk:

        mov     esi, boot_initramdisk

        call    boot_log

        call    ramdisk_init

        ret

;-----------------------------------------------------------------------------

iglobal

align 4

read_image_fsinfo:

        dd      0               ; function: read

        dq      0               ; offset: zero

        dd      1474560         ; size

        dd      RAMDISK         ; buffer

.name   db      '/hd'

.name_digit db  '0'

        db      '/'

.partition:

        rb      64      ; should be enough for '255/KOLIBRI/KOLIBRI.IMG'

bootpath1       db      'KOLIBRI.IMG',0

.len = $ - bootpath1

bootpath2       db      'KOLIBRI/KOLIBRI.IMG',0

.len = $ - bootpath2

endg

read_image:

        mov     ebx, read_image_fsinfo

        pushad

        call    file_system_lfn_protected

        popad

        ret

no_sys_on_hd:

        DEBUGF 1, "K : RD not found\n"

.1:

        ; test_to_format_ram_disk (need if not using ram disk)

        cmp     [boot_dev+OS_BASE+0x10000], 3

        jne     not_format_ram_disk

        ; format_ram_disk

        mov     edi, RAMDISK

        mov     ecx, 0x1080

        xor     eax, eax

@@:

        stosd

        loop    @b

        mov     ecx, 0x58F7F

        mov     eax, 0xF6F6F6F6

@@:

        stosd

        loop    @b

        mov     [RAMDISK+0x200], dword 0xFFFFF0         ; fat table

        mov     [RAMDISK+0x4200], dword 0xFFFFF0

not_format_ram_disk:

yes_sys_on_hd: