WebSVN – Kolibri OS – Blame – /kernel/trunk/fs/part_set.inc

Rev	Author	Line No.	Line
431	serge	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		2	;; ;;
		3	;; Copyright (C) KolibriOS team 2004-2007. All rights reserved. ;;
		4	;; Distributed under terms of the GNU General Public License ;;
		5	;; ;;
		6	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
		7
593	mikedld	8	$Revision: 593 $
		9
		10
65	mario79	11	;*************************************************************
578	mario79	12	;* 12.07.2007 Check all 4 entry of MBR and EMBR
		13	;* 29.04.2006 Elimination of hangup after the
		14	;* expiration hd_wait_timeout - Mario79
		15	;* 28.01.2006 find all Fat16/32 partition in all input point
		16	;* to MBR - Mario79
65	mario79	17	;*************************************************************
		18
277	diamond	19	uglobal
65	mario79	20	align 4
256	diamond	21
65	mario79	22	;******************************************************
431	serge	23	; Please do not change this place - variables in text
65	mario79	24	; Mario79
		25	; START place
		26	;******************************************************
		27	PARTITION_START dd 0x3f
		28	PARTITION_END dd 0
256	diamond	29	fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32
277	diamond	30	align 4
256	diamond	31
		32	fs_dependent_data_start:
		33	; FATxx data
		34
65	mario79	35	SECTORS_PER_FAT dd 0x1f3a
		36	NUMBER_OF_FATS dd 0x2
		37	SECTORS_PER_CLUSTER dd 0x8
		38	BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
		39	ROOT_CLUSTER dd 2 ; first rootdir cluster
		40	FAT_START dd 0 ; start of fat table
		41	ROOT_START dd 0 ; start of rootdir (only fat16)
		42	ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
		43	DATA_START dd 0 ; start of data area (=first cluster 2)
		44	LAST_CLUSTER dd 0 ; last availabe cluster
		45	ADR_FSINFO dd 0 ; used only by fat32
		46
		47	fatRESERVED dd 0x0FFFFFF6
		48	fatBAD dd 0x0FFFFFF7
		49	fatEND dd 0x0FFFFFF8
		50	fatMASK dd 0x0FFFFFFF
		51
256	diamond	52	fs_dependent_data_end:
321	diamond	53	file_system_data_size = $ - PARTITION_START
		54	if file_system_data_size > 96
		55	ERROR: sizeof(file system data) too big!
		56	end if
256	diamond	57
		58	virtual at fs_dependent_data_start
		59	; NTFS data
		60	ntfs_data:
		61	.sectors_per_cluster dd ?
		62	.mft_cluster dd ?
		63	.mftmirr_cluster dd ?
		64	.frs_size dd ? ; FRS size in bytes
		65	.iab_size dd ? ; IndexAllocationBuffer size in bytes
		66	.frs_buffer dd ?
		67	.iab_buffer dd ?
		68	.mft_retrieval dd ?
		69	.mft_retrieval_size dd ?
		70	.mft_retrieval_alloc dd ?
		71	.mft_retrieval_end dd ?
		72	.cur_index_size dd ?
		73	.cur_index_buf dd ?
		74	if $ > fs_dependent_data_end
		75	ERROR: increase sizeof(fs_dependent_data)!
		76	end if
		77	end virtual
		78
65	mario79	79	;***************************************************************************
		80	; End place
		81	; Mario79
		82	;***************************************************************************
277	diamond	83	endg
		84	iglobal
65	mario79	85
		86	partition_types: ; list of fat16/32 partitions
		87	db 0x04 ; DOS: fat16 <32M
		88	db 0x06 ; DOS: fat16 >32M
		89	db 0x0b ; WIN95: fat32
		90	db 0x0c ; WIN95: fat32, LBA-mapped
		91	db 0x0e ; WIN95: fat16, LBA-mapped
		92	db 0x14 ; Hidden DOS: fat16 <32M
		93	db 0x16 ; Hidden DOS: fat16 >32M
		94	db 0x1b ; Hidden WIN95: fat32
		95	db 0x1c ; Hidden WIN95: fat32, LBA-mapped
		96	db 0x1e ; Hidden WIN95: fat16, LBA-mapped
		97	db 0xc4 ; DRDOS/secured: fat16 <32M
		98	db 0xc6 ; DRDOS/secured: fat16 >32M
		99	db 0xcb ; DRDOS/secured: fat32
		100	db 0xcc ; DRDOS/secured: fat32, LBA-mapped
		101	db 0xce ; DRDOS/secured: fat16, LBA-mapped
		102	db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
		103	db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
256	diamond	104	db 0x07 ; NTFS
65	mario79	105	partition_types_end:
		106
		107
		108	extended_types: ; list of extended partitions
		109	db 0x05 ; DOS: extended partition
		110	db 0x0f ; WIN95: extended partition, LBA-mapped
		111	db 0xc5 ; DRDOS/secured: extended partition
		112	db 0xd5 ; Old Multiuser DOS secured: extended partition
		113	extended_types_end:
		114
		115	endg
		116
		117	; Partition chain used:
		118	; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
		119	;==========================================================
		120	; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
		121	; extended --+ extended --+ extended --+ extended --+
		122	; 0 0 0 0
		123	; 0 0 0 0
		124	; Notes:
		125	; - extended partition need to be in second entry on table
		126	; - it will skip over removed partitions
		127
		128	set_FAT32_variables:
		129	mov [problem_partition],0
		130	call reserve_hd1
321	diamond	131	call reserve_hd_channel
65	mario79	132
		133	cmp dword [hdpos],0
		134	je problem_hd
		135
		136	pushad
		137	xor ecx,ecx ; partition count
		138	mov edx,-1 ; flag for partition
		139	xor eax,eax ; read MBR
		140	xor ebp,ebp ; extended partition start
		141
		142	new_partition:
		143	test ebp,ebp ; is there extended partition?
		144	jnz extended_already_set ; yes
		145	xchg ebp,eax ; no. set it now
		146
		147	extended_already_set:
		148	add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
		149	mov ebx,buffer
		150	call hd_read
74	mario79	151	cmp [hd_error],0
		152	jne problem_hd
65	mario79	153
		154	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		155	jnz end_partition_chain
		156	cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
578	mario79	157	; jz next_partition
		158	jnz .next_primary_partition
		159	cmp dword [ebx+0x1be+0xc+16],0
		160	jnz next_primary_partition
		161	cmp dword [ebx+0x1be+0xc+16+16],0
		162	jnz next_primary_partition_1
		163	cmp dword [ebx+0x1be+0xc+16+16+16],0
		164	jnz next_primary_partition_2
		165	jmp next_partition
		166
		167	.next_primary_partition:
65	mario79	168	push eax
		169	mov al,[ebx+0x1be+4] ; get primary partition type
		170	call scan_partition_types
		171	pop eax
		172	jnz next_primary_partition ; no. skip over
		173
		174	inc ecx
		175	cmp ecx,[fat32part] ; is it wanted partition?
		176	jnz next_primary_partition ; no
		177
256	diamond	178	mov edx, eax ; start sector
		179	add edx, [ebx+0x1be+8] ; add relative start
		180	push edx
		181	add edx, [ebx+0x1be+12] ; add length
		182	dec edx ; PARTITION_END is inclusive
		183	mov [PARTITION_END], edx ; note that this can be changed
		184	; when file system data will be available
		185	mov dl, [ebx+0x1be+4]
		186	mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
		187	pop edx
		188
65	mario79	189	next_primary_partition:
		190	push eax
		191	mov al,[ebx+0x1be+4+16] ; get primary partition type
		192	call scan_partition_types
		193	pop eax
		194	jnz next_primary_partition_1 ; no. skip over
		195
		196	inc ecx
		197	cmp ecx,[fat32part] ; is it wanted partition?
		198	jnz next_primary_partition_1 ; no
		199
256	diamond	200	mov edx, eax
		201	add edx, [ebx+0x1be+8+16]
		202	push edx
		203	add edx, [ebx+0x1be+12+16]
		204	dec edx
		205	mov [PARTITION_END], edx
		206	mov dl, [ebx+0x1be+4+16]
		207	mov [fs_type], dl
		208	pop edx
65	mario79	209
		210	next_primary_partition_1:
		211	push eax
		212	mov al,[ebx+0x1be+4+16+16] ; get primary partition type
		213	call scan_partition_types
		214	pop eax
		215	jnz next_primary_partition_2 ; no. skip over
		216
		217	inc ecx
		218	cmp ecx,[fat32part] ; is it wanted partition?
		219	jnz next_primary_partition_2 ; no
		220
256	diamond	221	mov edx, eax
		222	add edx, [ebx+0x1be+8+16+16]
		223	push edx
		224	add edx, [ebx+0x1be+12+16+16]
		225	dec edx
		226	mov [PARTITION_END], edx
		227	mov dl, [ebx+0x1be+4+16+16]
		228	mov [fs_type], dl
		229	pop edx
65	mario79	230
		231	next_primary_partition_2:
		232	push eax
		233	mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
		234	call scan_partition_types
		235	pop eax
		236	jnz next_partition ; no. skip over
		237
		238	inc ecx
		239	cmp ecx,[fat32part] ; is it wanted partition?
		240	jnz next_partition ; no
		241
256	diamond	242	mov edx, eax
		243	add edx, [ebx+0x1be+8+16+16+16]
		244	push edx
		245	add edx, [ebx+0x1be+12+16+16+16]
		246	dec edx
		247	mov [PARTITION_END], edx
		248	mov dl, [ebx+0x1be+4+16+16+16]
		249	mov [fs_type], dl
		250	pop edx
65	mario79	251
		252	next_partition:
		253	push eax
		254	mov al,[ebx+0x1be+4] ; get extended partition type
		255	call scan_extended_types
		256	pop eax
		257	jnz next_partition_1
		258
		259	mov eax,[ebx+0x1be+8] ; add relative start
		260	test eax,eax ; is there extended partition?
		261	jnz new_partition ; yes. read it
		262
		263	next_partition_1:
		264	push eax
		265	mov al,[ebx+0x1be+4+16] ; get extended partition type
		266	call scan_extended_types
		267	pop eax
		268	jnz next_partition_2
		269
		270	mov eax,[ebx+0x1be+8+16] ; add relative start
		271	test eax,eax ; is there extended partition?
		272	jnz new_partition ; yes. read it
		273
		274	next_partition_2:
		275	push eax
		276	mov al,[ebx+0x1be+4+16+16] ; get extended partition type
		277	call scan_extended_types
		278	pop eax
		279	jnz next_partition_3
		280
		281	mov eax,[ebx+0x1be+8+16+16] ; add relative start
		282	test eax,eax ; is there extended partition?
		283	jnz new_partition ; yes. read it
		284
		285	next_partition_3:
		286	push eax
		287	mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
		288	call scan_extended_types
		289	pop eax
		290	jnz end_partition_chain ; no. end chain
		291
		292	mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
		293	test eax,eax ; is there extended partition?
		294	jnz new_partition ; yes. read it
		295
		296	end_partition_chain:
		297	mov [partition_count],ecx
		298
		299	cmp edx,-1 ; found wanted partition?
		300	jnz hd_and_partition_ok ; yes. install it
		301	jmp problem_partition_or_fat
		302
		303	scan_partition_types:
		304	push ecx
		305	mov edi,partition_types
		306	mov ecx,partition_types_end-partition_types
		307	cld
		308	repne scasb ; is partition type ok?
		309	pop ecx
		310	ret
		311
		312	scan_extended_types:
		313	push ecx
		314	mov edi,extended_types
		315	mov ecx,extended_types_end-extended_types
		316	cld
		317	repne scasb ; is it extended partition?
		318	pop ecx
		319	ret
		320
		321	problem_fat_dec_count: ; bootsector is missing or another problem
		322	dec [partition_count] ; remove it from partition_count
		323
		324	problem_partition_or_fat:
		325	popad
		326
		327	problem_hd:
256	diamond	328	mov [fs_type],0
321	diamond	329	call free_hd_channel
65	mario79	330	mov [hd1_status],0 ; free
		331	mov [problem_partition],1
		332	ret
		333
		334	hd_and_partition_ok:
		335	mov eax,edx
		336	mov [PARTITION_START],eax
256	diamond	337	mov edx, [PARTITION_END]
		338	sub edx, eax
		339	inc edx ; edx = length of partition
65	mario79	340
256	diamond	341	; mov [hd_setup],1
65	mario79	342	mov ebx,buffer
		343	call hd_read ; read boot sector of partition
256	diamond	344	cmp [hd_error], 0
		345	jz boot_read_ok
		346	cmp [fs_type], 7
		347	jnz problem_fat_dec_count
		348	; NTFS duplicates bootsector:
		349	; NT4/2k/XP+ saves bootsector copy in the end of disk
		350	; NT 3.51 saves bootsector copy in the middle of disk
		351	and [hd_error], 0
		352	mov eax, [PARTITION_END]
		353	call hd_read
		354	cmp [hd_error], 0
		355	jnz @f
		356	call ntfs_test_bootsec
		357	jnc boot_read_ok
		358	@@:
		359	and [hd_error], 0
		360	mov eax, edx
		361	shr eax, 1
		362	add eax, [PARTITION_START]
		363	call hd_read
		364	cmp [hd_error], 0
		365	jnz problem_fat_dec_count ; �� 졠...
		366	boot_read_ok:
		367	; mov [hd_setup], 0
		368	; if we are running on NTFS, check bootsector
		369	cmp [fs_type], 7
		370	jz ntfs_setup
74	mario79	371
65	mario79	372	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		373	jnz problem_fat_dec_count
		374
		375	movzx eax,word [ebx+0xe] ; sectors reserved
		376	add eax,[PARTITION_START]
		377	mov [FAT_START],eax ; fat_start = partition_start + reserved
		378
		379	movzx eax,byte [ebx+0xd] ; sectors per cluster
		380	mov [SECTORS_PER_CLUSTER],eax
		381
		382	movzx ecx,word [ebx+0xb] ; bytes per sector
		383	mov [BYTES_PER_SECTOR],ecx
		384
		385	movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
		386	mov edx,32
		387	mul edx
		388	dec ecx
		389	add eax,ecx ; round up if not equal count
		390	inc ecx ; bytes per sector
		391	div ecx
		392	mov [ROOT_SECTORS],eax ; count of rootdir sectors
		393
		394	movzx eax,word [ebx+0x16] ; sectors per fat <65536
		395	test eax,eax
		396	jnz fat16_fatsize
		397	mov eax,[ebx+0x24] ; sectors per fat
		398	fat16_fatsize:
		399	mov [SECTORS_PER_FAT],eax
		400
		401	movzx eax,byte [ebx+0x10] ; number of fats
		402	test eax,eax ; if 0 it's not fat partition
		403	jz problem_fat_dec_count
		404	mov [NUMBER_OF_FATS],eax
		405	imul eax,[SECTORS_PER_FAT]
		406	add eax,[FAT_START]
		407	mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
		408	add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
		409	mov [DATA_START],eax ; data area = rootdir + rootdir_size
		410
		411	movzx eax,word [ebx+0x13] ; total sector count <65536
		412	test eax,eax
		413	jnz fat16_total
		414	mov eax,[ebx+0x20] ; total sector count
		415	fat16_total:
		416	add eax,[PARTITION_START]
		417	dec eax
		418	mov [PARTITION_END],eax
		419	inc eax
		420	sub eax,[DATA_START] ; eax = count of data sectors
		421	xor edx,edx
		422	div dword [SECTORS_PER_CLUSTER]
		423	inc eax
		424	mov [LAST_CLUSTER],eax
		425	dec eax ; cluster count
		426
		427	; limits by Microsoft Hardware White Paper v1.03
		428	cmp eax,4085 ; 0xff5
		429	jb problem_fat_dec_count ; fat12 not supported
		430	cmp eax,65525 ; 0xfff5
		431	jb fat16_partition
		432
		433	fat32_partition:
		434	mov eax,[ebx+0x2c] ; rootdir cluster
		435	mov [ROOT_CLUSTER],eax
		436	movzx eax,word [ebx+0x30] ; fs info sector
		437	add eax,[PARTITION_START]
		438	mov [ADR_FSINFO],eax
		439
		440	popad
		441
		442	mov [fatRESERVED],0x0FFFFFF6
		443	mov [fatBAD],0x0FFFFFF7
		444	mov [fatEND],0x0FFFFFF8
		445	mov [fatMASK],0x0FFFFFFF
256	diamond	446	mov [fs_type],32 ; Fat32
321	diamond	447	call free_hd_channel
65	mario79	448	mov [hd1_status],0 ; free
		449	ret
		450
		451	fat16_partition:
		452	xor eax,eax
		453	mov [ROOT_CLUSTER],eax
		454
		455	popad
		456
		457	mov [fatRESERVED],0x0000FFF6
		458	mov [fatBAD],0x0000FFF7
		459	mov [fatEND],0x0000FFF8
		460	mov [fatMASK],0x0000FFFF
256	diamond	461	mov [fs_type],16 ; Fat16
321	diamond	462	call free_hd_channel
65	mario79	463	mov [hd1_status],0 ; free
		464	ret

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(root)/kernel/trunk/fs/part_set.inc @ 1379 – Rev 593