kolibrios/kernel/branches/Kolibri-acpi/boot/rdload.inc

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2013. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
read_ramdisk:
; READ RAMDISK IMAGE FROM HD
cmp [boot_dev+OS_BASE+0x10000], 1
jne no_sys_on_hd
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:
pop edi esi eax
jmp yes_sys_on_hd
iglobal
align 4
read_image_fsinfo:
dd 0 ; function: read
dq 0 ; offset: zero
dd 1474560 ; size
dd RAMDISK ; buffer
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:
; 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: