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

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

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(root)/kernel/trunk/fs/part_set.inc – Rev 425