kolibrios/kernel/branches/net/boot/rdload.inc

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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2011. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision $
; READ RAMDISK IMAGE FROM HD
cmp [boot_dev+OS_BASE+0x10000], 1
jne no_sys_on_hd
test [DRIVE_DATA+1], byte 0x40
jz position_2
mov [hdbase], 0x1f0
mov [hdid], 0x0
mov [hdpos], 1
mov [fat32part], 0
position_1_1:
inc [fat32part]
call search_and_read_image
cmp [image_retrieved], 1
je yes_sys_on_hd
movzx eax, byte [DRIVE_DATA+2]
cmp [fat32part], eax
jle position_1_1
position_2:
test [DRIVE_DATA+1], byte 0x10
jz position_3
mov [hdbase], 0x1f0
mov [hdid], 0x10
mov [hdpos], 2
mov [fat32part], 0
position_2_1:
inc [fat32part]
call search_and_read_image
cmp [image_retrieved], 1
je yes_sys_on_hd
movzx eax, byte [DRIVE_DATA+3]
cmp eax, [fat32part]
jle position_2_1
position_3:
test [DRIVE_DATA+1], byte 0x4
jz position_4
mov [hdbase], 0x170
mov [hdid], 0x0
mov [hdpos], 3
mov [fat32part], 0
position_3_1:
inc [fat32part]
call search_and_read_image
cmp [image_retrieved], 1
je yes_sys_on_hd
movzx eax, byte [DRIVE_DATA+4]
cmp eax, [fat32part]
jle position_3_1
position_4:
test [DRIVE_DATA+1], byte 0x1
jz no_sys_on_hd
mov [hdbase], 0x170
mov [hdid], 0x10
mov [hdpos], 4
mov [fat32part], 0
position_4_1:
inc [fat32part]
call search_and_read_image
cmp [image_retrieved], 1
je yes_sys_on_hd
movzx eax, byte [DRIVE_DATA+5]
cmp eax, [fat32part]
jle position_4_1
jmp yes_sys_on_hd
search_and_read_image:
call set_FAT32_variables
mov edx, bootpath
call read_image
test eax, eax
jz image_present
mov edx, bootpath2
call read_image
test eax, eax
jz image_present
ret
image_present:
mov [image_retrieved], 1
ret
iglobal
align 4
read_image_fsinfo:
dd 0 ; function: read
dq 0 ; offset: zero
dd 1474560/512 ; size
dd RAMDISK ; buffer
db 0
dd hdsysimage+OS_BASE+0x10000
endg
read_image:
mov ebx, read_image_fsinfo
pushad
call file_system_lfn_protected
popad
ret
image_retrieved db 0
counter_of_partitions db 0
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: