mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-05 14:51:54 +03:00
a9706fb6ca
* Deleted useless code git-svn-id: svn://kolibrios.org@277 a494cfbc-eb01-0410-851d-a64ba20cac60
439 lines
14 KiB
PHP
439 lines
14 KiB
PHP
;*************************************************************
|
||
;* 29.04.2006 Elimination of hangup after the *
|
||
;* expiration hd_wait_timeout - Mario79 *
|
||
;* 28.01.2006 find all Fat16/32 partition in all input point *
|
||
;* to MBR - Mario79 *
|
||
;*************************************************************
|
||
|
||
uglobal
|
||
align 4
|
||
|
||
;******************************************************
|
||
; Please do not change this place - variables in text
|
||
; Mario79
|
||
; START place
|
||
;******************************************************
|
||
PARTITION_START dd 0x3f
|
||
PARTITION_END dd 0
|
||
fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32
|
||
align 4
|
||
|
||
fs_dependent_data_start:
|
||
; FATxx data
|
||
|
||
SECTORS_PER_FAT dd 0x1f3a
|
||
NUMBER_OF_FATS dd 0x2
|
||
SECTORS_PER_CLUSTER dd 0x8
|
||
BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
|
||
ROOT_CLUSTER dd 2 ; first rootdir cluster
|
||
FAT_START dd 0 ; start of fat table
|
||
ROOT_START dd 0 ; start of rootdir (only fat16)
|
||
ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
|
||
DATA_START dd 0 ; start of data area (=first cluster 2)
|
||
LAST_CLUSTER dd 0 ; last availabe cluster
|
||
ADR_FSINFO dd 0 ; used only by fat32
|
||
|
||
fatRESERVED dd 0x0FFFFFF6
|
||
fatBAD dd 0x0FFFFFF7
|
||
fatEND dd 0x0FFFFFF8
|
||
fatMASK dd 0x0FFFFFFF
|
||
|
||
fs_dependent_data_end:
|
||
|
||
virtual at fs_dependent_data_start
|
||
; NTFS data
|
||
ntfs_data:
|
||
.sectors_per_cluster dd ?
|
||
.mft_cluster dd ?
|
||
.mftmirr_cluster dd ?
|
||
.frs_size dd ? ; FRS size in bytes
|
||
.iab_size dd ? ; IndexAllocationBuffer size in bytes
|
||
.frs_buffer dd ?
|
||
.iab_buffer dd ?
|
||
.mft_retrieval dd ?
|
||
.mft_retrieval_size dd ?
|
||
.mft_retrieval_alloc dd ?
|
||
.mft_retrieval_end dd ?
|
||
.cur_index_size dd ?
|
||
.cur_index_buf dd ?
|
||
if $ > fs_dependent_data_end
|
||
ERROR: increase sizeof(fs_dependent_data)!
|
||
end if
|
||
end virtual
|
||
|
||
;***************************************************************************
|
||
; End place
|
||
; Mario79
|
||
;***************************************************************************
|
||
endg
|
||
iglobal
|
||
|
||
partition_types: ; list of fat16/32 partitions
|
||
db 0x04 ; DOS: fat16 <32M
|
||
db 0x06 ; DOS: fat16 >32M
|
||
db 0x0b ; WIN95: fat32
|
||
db 0x0c ; WIN95: fat32, LBA-mapped
|
||
db 0x0e ; WIN95: fat16, LBA-mapped
|
||
db 0x14 ; Hidden DOS: fat16 <32M
|
||
db 0x16 ; Hidden DOS: fat16 >32M
|
||
db 0x1b ; Hidden WIN95: fat32
|
||
db 0x1c ; Hidden WIN95: fat32, LBA-mapped
|
||
db 0x1e ; Hidden WIN95: fat16, LBA-mapped
|
||
db 0xc4 ; DRDOS/secured: fat16 <32M
|
||
db 0xc6 ; DRDOS/secured: fat16 >32M
|
||
db 0xcb ; DRDOS/secured: fat32
|
||
db 0xcc ; DRDOS/secured: fat32, LBA-mapped
|
||
db 0xce ; DRDOS/secured: fat16, LBA-mapped
|
||
db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
|
||
db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
|
||
db 0x07 ; NTFS
|
||
partition_types_end:
|
||
|
||
|
||
extended_types: ; list of extended partitions
|
||
db 0x05 ; DOS: extended partition
|
||
db 0x0f ; WIN95: extended partition, LBA-mapped
|
||
db 0xc5 ; DRDOS/secured: extended partition
|
||
db 0xd5 ; Old Multiuser DOS secured: extended partition
|
||
extended_types_end:
|
||
|
||
endg
|
||
|
||
; Partition chain used:
|
||
; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
|
||
;==========================================================
|
||
; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
|
||
; extended --+ extended --+ extended --+ extended --+
|
||
; 0 0 0 0
|
||
; 0 0 0 0
|
||
; Notes:
|
||
; - extended partition need to be in second entry on table
|
||
; - it will skip over removed partitions
|
||
|
||
set_FAT32_variables:
|
||
mov [0xfe10],dword 0 ; entries in hd cache
|
||
mov [problem_partition],0
|
||
call reserve_hd1
|
||
call clear_hd_cache
|
||
|
||
cmp dword [hdpos],0
|
||
je problem_hd
|
||
|
||
pushad
|
||
xor ecx,ecx ; partition count
|
||
mov edx,-1 ; flag for partition
|
||
xor eax,eax ; read MBR
|
||
xor ebp,ebp ; extended partition start
|
||
|
||
new_partition:
|
||
test ebp,ebp ; is there extended partition?
|
||
jnz extended_already_set ; yes
|
||
xchg ebp,eax ; no. set it now
|
||
|
||
extended_already_set:
|
||
add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
|
||
mov ebx,buffer
|
||
call hd_read
|
||
cmp [hd_error],0
|
||
jne problem_hd
|
||
|
||
cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
|
||
jnz end_partition_chain
|
||
cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
|
||
jz next_partition
|
||
|
||
push eax
|
||
mov al,[ebx+0x1be+4] ; get primary partition type
|
||
call scan_partition_types
|
||
pop eax
|
||
jnz next_primary_partition ; no. skip over
|
||
|
||
inc ecx
|
||
cmp ecx,[fat32part] ; is it wanted partition?
|
||
jnz next_primary_partition ; no
|
||
|
||
mov edx, eax ; start sector
|
||
add edx, [ebx+0x1be+8] ; add relative start
|
||
push edx
|
||
add edx, [ebx+0x1be+12] ; add length
|
||
dec edx ; PARTITION_END is inclusive
|
||
mov [PARTITION_END], edx ; note that this can be changed
|
||
; when file system data will be available
|
||
mov dl, [ebx+0x1be+4]
|
||
mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
|
||
pop edx
|
||
|
||
next_primary_partition:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16] ; get primary partition type
|
||
call scan_partition_types
|
||
pop eax
|
||
jnz next_primary_partition_1 ; no. skip over
|
||
|
||
inc ecx
|
||
cmp ecx,[fat32part] ; is it wanted partition?
|
||
jnz next_primary_partition_1 ; no
|
||
|
||
mov edx, eax
|
||
add edx, [ebx+0x1be+8+16]
|
||
push edx
|
||
add edx, [ebx+0x1be+12+16]
|
||
dec edx
|
||
mov [PARTITION_END], edx
|
||
mov dl, [ebx+0x1be+4+16]
|
||
mov [fs_type], dl
|
||
pop edx
|
||
|
||
next_primary_partition_1:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16+16] ; get primary partition type
|
||
call scan_partition_types
|
||
pop eax
|
||
jnz next_primary_partition_2 ; no. skip over
|
||
|
||
inc ecx
|
||
cmp ecx,[fat32part] ; is it wanted partition?
|
||
jnz next_primary_partition_2 ; no
|
||
|
||
mov edx, eax
|
||
add edx, [ebx+0x1be+8+16+16]
|
||
push edx
|
||
add edx, [ebx+0x1be+12+16+16]
|
||
dec edx
|
||
mov [PARTITION_END], edx
|
||
mov dl, [ebx+0x1be+4+16+16]
|
||
mov [fs_type], dl
|
||
pop edx
|
||
|
||
next_primary_partition_2:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
|
||
call scan_partition_types
|
||
pop eax
|
||
jnz next_partition ; no. skip over
|
||
|
||
inc ecx
|
||
cmp ecx,[fat32part] ; is it wanted partition?
|
||
jnz next_partition ; no
|
||
|
||
mov edx, eax
|
||
add edx, [ebx+0x1be+8+16+16+16]
|
||
push edx
|
||
add edx, [ebx+0x1be+12+16+16+16]
|
||
dec edx
|
||
mov [PARTITION_END], edx
|
||
mov dl, [ebx+0x1be+4+16+16+16]
|
||
mov [fs_type], dl
|
||
pop edx
|
||
|
||
next_partition:
|
||
push eax
|
||
mov al,[ebx+0x1be+4] ; get extended partition type
|
||
call scan_extended_types
|
||
pop eax
|
||
jnz next_partition_1
|
||
|
||
mov eax,[ebx+0x1be+8] ; add relative start
|
||
test eax,eax ; is there extended partition?
|
||
jnz new_partition ; yes. read it
|
||
|
||
next_partition_1:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16] ; get extended partition type
|
||
call scan_extended_types
|
||
pop eax
|
||
jnz next_partition_2
|
||
|
||
mov eax,[ebx+0x1be+8+16] ; add relative start
|
||
test eax,eax ; is there extended partition?
|
||
jnz new_partition ; yes. read it
|
||
|
||
next_partition_2:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16+16] ; get extended partition type
|
||
call scan_extended_types
|
||
pop eax
|
||
jnz next_partition_3
|
||
|
||
mov eax,[ebx+0x1be+8+16+16] ; add relative start
|
||
test eax,eax ; is there extended partition?
|
||
jnz new_partition ; yes. read it
|
||
|
||
next_partition_3:
|
||
push eax
|
||
mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
|
||
call scan_extended_types
|
||
pop eax
|
||
jnz end_partition_chain ; no. end chain
|
||
|
||
mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
|
||
test eax,eax ; is there extended partition?
|
||
jnz new_partition ; yes. read it
|
||
|
||
end_partition_chain:
|
||
mov [partition_count],ecx
|
||
|
||
cmp edx,-1 ; found wanted partition?
|
||
jnz hd_and_partition_ok ; yes. install it
|
||
jmp problem_partition_or_fat
|
||
|
||
scan_partition_types:
|
||
push ecx
|
||
mov edi,partition_types
|
||
mov ecx,partition_types_end-partition_types
|
||
cld
|
||
repne scasb ; is partition type ok?
|
||
pop ecx
|
||
ret
|
||
|
||
scan_extended_types:
|
||
push ecx
|
||
mov edi,extended_types
|
||
mov ecx,extended_types_end-extended_types
|
||
cld
|
||
repne scasb ; is it extended partition?
|
||
pop ecx
|
||
ret
|
||
|
||
problem_fat_dec_count: ; bootsector is missing or another problem
|
||
dec [partition_count] ; remove it from partition_count
|
||
|
||
problem_partition_or_fat:
|
||
popad
|
||
|
||
problem_hd:
|
||
mov [fs_type],0
|
||
mov [hd1_status],0 ; free
|
||
mov [problem_partition],1
|
||
ret
|
||
|
||
hd_and_partition_ok:
|
||
mov eax,edx
|
||
mov [PARTITION_START],eax
|
||
mov edx, [PARTITION_END]
|
||
sub edx, eax
|
||
inc edx ; edx = length of partition
|
||
|
||
; mov [hd_setup],1
|
||
mov ebx,buffer
|
||
call hd_read ; read boot sector of partition
|
||
cmp [hd_error], 0
|
||
jz boot_read_ok
|
||
cmp [fs_type], 7
|
||
jnz problem_fat_dec_count
|
||
; NTFS duplicates bootsector:
|
||
; NT4/2k/XP+ saves bootsector copy in the end of disk
|
||
; NT 3.51 saves bootsector copy in the middle of disk
|
||
and [hd_error], 0
|
||
mov eax, [PARTITION_END]
|
||
call hd_read
|
||
cmp [hd_error], 0
|
||
jnz @f
|
||
call ntfs_test_bootsec
|
||
jnc boot_read_ok
|
||
@@:
|
||
and [hd_error], 0
|
||
mov eax, edx
|
||
shr eax, 1
|
||
add eax, [PARTITION_START]
|
||
call hd_read
|
||
cmp [hd_error], 0
|
||
jnz problem_fat_dec_count ; <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>졠...
|
||
boot_read_ok:
|
||
; mov [hd_setup], 0
|
||
; if we are running on NTFS, check bootsector
|
||
cmp [fs_type], 7
|
||
jz ntfs_setup
|
||
|
||
cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
|
||
jnz problem_fat_dec_count
|
||
|
||
movzx eax,word [ebx+0xe] ; sectors reserved
|
||
add eax,[PARTITION_START]
|
||
mov [FAT_START],eax ; fat_start = partition_start + reserved
|
||
|
||
movzx eax,byte [ebx+0xd] ; sectors per cluster
|
||
mov [SECTORS_PER_CLUSTER],eax
|
||
|
||
movzx ecx,word [ebx+0xb] ; bytes per sector
|
||
mov [BYTES_PER_SECTOR],ecx
|
||
|
||
movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
|
||
mov edx,32
|
||
mul edx
|
||
dec ecx
|
||
add eax,ecx ; round up if not equal count
|
||
inc ecx ; bytes per sector
|
||
div ecx
|
||
mov [ROOT_SECTORS],eax ; count of rootdir sectors
|
||
|
||
movzx eax,word [ebx+0x16] ; sectors per fat <65536
|
||
test eax,eax
|
||
jnz fat16_fatsize
|
||
mov eax,[ebx+0x24] ; sectors per fat
|
||
fat16_fatsize:
|
||
mov [SECTORS_PER_FAT],eax
|
||
|
||
movzx eax,byte [ebx+0x10] ; number of fats
|
||
test eax,eax ; if 0 it's not fat partition
|
||
jz problem_fat_dec_count
|
||
mov [NUMBER_OF_FATS],eax
|
||
imul eax,[SECTORS_PER_FAT]
|
||
add eax,[FAT_START]
|
||
mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
|
||
add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
|
||
mov [DATA_START],eax ; data area = rootdir + rootdir_size
|
||
|
||
movzx eax,word [ebx+0x13] ; total sector count <65536
|
||
test eax,eax
|
||
jnz fat16_total
|
||
mov eax,[ebx+0x20] ; total sector count
|
||
fat16_total:
|
||
add eax,[PARTITION_START]
|
||
dec eax
|
||
mov [PARTITION_END],eax
|
||
inc eax
|
||
sub eax,[DATA_START] ; eax = count of data sectors
|
||
xor edx,edx
|
||
div dword [SECTORS_PER_CLUSTER]
|
||
inc eax
|
||
mov [LAST_CLUSTER],eax
|
||
dec eax ; cluster count
|
||
|
||
; limits by Microsoft Hardware White Paper v1.03
|
||
cmp eax,4085 ; 0xff5
|
||
jb problem_fat_dec_count ; fat12 not supported
|
||
cmp eax,65525 ; 0xfff5
|
||
jb fat16_partition
|
||
|
||
fat32_partition:
|
||
mov eax,[ebx+0x2c] ; rootdir cluster
|
||
mov [ROOT_CLUSTER],eax
|
||
movzx eax,word [ebx+0x30] ; fs info sector
|
||
add eax,[PARTITION_START]
|
||
mov [ADR_FSINFO],eax
|
||
|
||
popad
|
||
|
||
mov [fatRESERVED],0x0FFFFFF6
|
||
mov [fatBAD],0x0FFFFFF7
|
||
mov [fatEND],0x0FFFFFF8
|
||
mov [fatMASK],0x0FFFFFFF
|
||
mov [fs_type],32 ; Fat32
|
||
mov [hd1_status],0 ; free
|
||
ret
|
||
|
||
fat16_partition:
|
||
xor eax,eax
|
||
mov [ROOT_CLUSTER],eax
|
||
|
||
popad
|
||
|
||
mov [fatRESERVED],0x0000FFF6
|
||
mov [fatBAD],0x0000FFF7
|
||
mov [fatEND],0x0000FFF8
|
||
mov [fatMASK],0x0000FFFF
|
||
mov [fs_type],16 ; Fat16
|
||
mov [hd1_status],0 ; free
|
||
ret
|