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

Rev	Author	Line No.	Line
65	mario79	1	;*************************************************************
74	mario79	2	;* 29.04.2006 Elimination of hangup after the *
		3	;* expiration hd_wait_timeout - Mario79 *
65	mario79	4	;* 28.01.2006 find all Fat16/32 partition in all input point *
		5	;* to MBR - Mario79 *
		6	;*************************************************************
		7
277	diamond	8	uglobal
65	mario79	9	align 4
256	diamond	10
65	mario79	11	;******************************************************
		12	; Please do not change this place - variables in text
		13	; Mario79
		14	; START place
		15	;******************************************************
		16	PARTITION_START dd 0x3f
		17	PARTITION_END dd 0
256	diamond	18	fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32
277	diamond	19	align 4
256	diamond	20
		21	fs_dependent_data_start:
		22	; FATxx data
		23
65	mario79	24	SECTORS_PER_FAT dd 0x1f3a
		25	NUMBER_OF_FATS dd 0x2
		26	SECTORS_PER_CLUSTER dd 0x8
		27	BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
		28	ROOT_CLUSTER dd 2 ; first rootdir cluster
		29	FAT_START dd 0 ; start of fat table
		30	ROOT_START dd 0 ; start of rootdir (only fat16)
		31	ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
		32	DATA_START dd 0 ; start of data area (=first cluster 2)
		33	LAST_CLUSTER dd 0 ; last availabe cluster
		34	ADR_FSINFO dd 0 ; used only by fat32
		35
		36	fatRESERVED dd 0x0FFFFFF6
		37	fatBAD dd 0x0FFFFFF7
		38	fatEND dd 0x0FFFFFF8
		39	fatMASK dd 0x0FFFFFFF
		40
256	diamond	41	fs_dependent_data_end:
		42
		43	virtual at fs_dependent_data_start
		44	; NTFS data
		45	ntfs_data:
		46	.sectors_per_cluster dd ?
		47	.mft_cluster dd ?
		48	.mftmirr_cluster dd ?
		49	.frs_size dd ? ; FRS size in bytes
		50	.iab_size dd ? ; IndexAllocationBuffer size in bytes
		51	.frs_buffer dd ?
		52	.iab_buffer dd ?
		53	.mft_retrieval dd ?
		54	.mft_retrieval_size dd ?
		55	.mft_retrieval_alloc dd ?
		56	.mft_retrieval_end dd ?
		57	.cur_index_size dd ?
		58	.cur_index_buf dd ?
		59	if $ > fs_dependent_data_end
		60	ERROR: increase sizeof(fs_dependent_data)!
		61	end if
		62	end virtual
		63
65	mario79	64	;***************************************************************************
		65	; End place
		66	; Mario79
		67	;***************************************************************************
277	diamond	68	endg
		69	iglobal
65	mario79	70
		71	partition_types: ; list of fat16/32 partitions
		72	db 0x04 ; DOS: fat16 <32M
		73	db 0x06 ; DOS: fat16 >32M
		74	db 0x0b ; WIN95: fat32
		75	db 0x0c ; WIN95: fat32, LBA-mapped
		76	db 0x0e ; WIN95: fat16, LBA-mapped
		77	db 0x14 ; Hidden DOS: fat16 <32M
		78	db 0x16 ; Hidden DOS: fat16 >32M
		79	db 0x1b ; Hidden WIN95: fat32
		80	db 0x1c ; Hidden WIN95: fat32, LBA-mapped
		81	db 0x1e ; Hidden WIN95: fat16, LBA-mapped
		82	db 0xc4 ; DRDOS/secured: fat16 <32M
		83	db 0xc6 ; DRDOS/secured: fat16 >32M
		84	db 0xcb ; DRDOS/secured: fat32
		85	db 0xcc ; DRDOS/secured: fat32, LBA-mapped
		86	db 0xce ; DRDOS/secured: fat16, LBA-mapped
		87	db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
		88	db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
256	diamond	89	db 0x07 ; NTFS
65	mario79	90	partition_types_end:
		91
		92
		93	extended_types: ; list of extended partitions
		94	db 0x05 ; DOS: extended partition
		95	db 0x0f ; WIN95: extended partition, LBA-mapped
		96	db 0xc5 ; DRDOS/secured: extended partition
		97	db 0xd5 ; Old Multiuser DOS secured: extended partition
		98	extended_types_end:
		99
		100	endg
		101
		102	; Partition chain used:
		103	; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
		104	;==========================================================
		105	; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
		106	; extended --+ extended --+ extended --+ extended --+
		107	; 0 0 0 0
		108	; 0 0 0 0
		109	; Notes:
		110	; - extended partition need to be in second entry on table
		111	; - it will skip over removed partitions
		112
		113	set_FAT32_variables:
		114	mov [0xfe10],dword 0 ; entries in hd cache
		115	mov [problem_partition],0
		116	call reserve_hd1
		117	call clear_hd_cache
		118
		119	cmp dword [hdpos],0
		120	je problem_hd
		121
		122	pushad
		123	xor ecx,ecx ; partition count
		124	mov edx,-1 ; flag for partition
		125	xor eax,eax ; read MBR
		126	xor ebp,ebp ; extended partition start
		127
		128	new_partition:
		129	test ebp,ebp ; is there extended partition?
		130	jnz extended_already_set ; yes
		131	xchg ebp,eax ; no. set it now
		132
		133	extended_already_set:
		134	add eax,ebp ; mbr=mbr+0, ext_part=ext_start+relat_start
		135	mov ebx,buffer
		136	call hd_read
74	mario79	137	cmp [hd_error],0
		138	jne problem_hd
65	mario79	139
		140	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		141	jnz end_partition_chain
		142	cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
		143	jz next_partition
		144
		145	push eax
		146	mov al,[ebx+0x1be+4] ; get primary partition type
		147	call scan_partition_types
		148	pop eax
		149	jnz next_primary_partition ; no. skip over
		150
		151	inc ecx
		152	cmp ecx,[fat32part] ; is it wanted partition?
		153	jnz next_primary_partition ; no
		154
256	diamond	155	mov edx, eax ; start sector
		156	add edx, [ebx+0x1be+8] ; add relative start
		157	push edx
		158	add edx, [ebx+0x1be+12] ; add length
		159	dec edx ; PARTITION_END is inclusive
		160	mov [PARTITION_END], edx ; note that this can be changed
		161	; when file system data will be available
		162	mov dl, [ebx+0x1be+4]
		163	mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
		164	pop edx
		165
65	mario79	166	next_primary_partition:
		167	push eax
		168	mov al,[ebx+0x1be+4+16] ; get primary partition type
		169	call scan_partition_types
		170	pop eax
		171	jnz next_primary_partition_1 ; no. skip over
		172
		173	inc ecx
		174	cmp ecx,[fat32part] ; is it wanted partition?
		175	jnz next_primary_partition_1 ; no
		176
256	diamond	177	mov edx, eax
		178	add edx, [ebx+0x1be+8+16]
		179	push edx
		180	add edx, [ebx+0x1be+12+16]
		181	dec edx
		182	mov [PARTITION_END], edx
		183	mov dl, [ebx+0x1be+4+16]
		184	mov [fs_type], dl
		185	pop edx
65	mario79	186
		187	next_primary_partition_1:
		188	push eax
		189	mov al,[ebx+0x1be+4+16+16] ; get primary partition type
		190	call scan_partition_types
		191	pop eax
		192	jnz next_primary_partition_2 ; no. skip over
		193
		194	inc ecx
		195	cmp ecx,[fat32part] ; is it wanted partition?
		196	jnz next_primary_partition_2 ; no
		197
256	diamond	198	mov edx, eax
		199	add edx, [ebx+0x1be+8+16+16]
		200	push edx
		201	add edx, [ebx+0x1be+12+16+16]
		202	dec edx
		203	mov [PARTITION_END], edx
		204	mov dl, [ebx+0x1be+4+16+16]
		205	mov [fs_type], dl
		206	pop edx
65	mario79	207
		208	next_primary_partition_2:
		209	push eax
		210	mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
		211	call scan_partition_types
		212	pop eax
		213	jnz next_partition ; no. skip over
		214
		215	inc ecx
		216	cmp ecx,[fat32part] ; is it wanted partition?
		217	jnz next_partition ; no
		218
256	diamond	219	mov edx, eax
		220	add edx, [ebx+0x1be+8+16+16+16]
		221	push edx
		222	add edx, [ebx+0x1be+12+16+16+16]
		223	dec edx
		224	mov [PARTITION_END], edx
		225	mov dl, [ebx+0x1be+4+16+16+16]
		226	mov [fs_type], dl
		227	pop edx
65	mario79	228
		229	next_partition:
		230	push eax
		231	mov al,[ebx+0x1be+4] ; get extended partition type
		232	call scan_extended_types
		233	pop eax
		234	jnz next_partition_1
		235
		236	mov eax,[ebx+0x1be+8] ; add relative start
		237	test eax,eax ; is there extended partition?
		238	jnz new_partition ; yes. read it
		239
		240	next_partition_1:
		241	push eax
		242	mov al,[ebx+0x1be+4+16] ; get extended partition type
		243	call scan_extended_types
		244	pop eax
		245	jnz next_partition_2
		246
		247	mov eax,[ebx+0x1be+8+16] ; add relative start
		248	test eax,eax ; is there extended partition?
		249	jnz new_partition ; yes. read it
		250
		251	next_partition_2:
		252	push eax
		253	mov al,[ebx+0x1be+4+16+16] ; get extended partition type
		254	call scan_extended_types
		255	pop eax
		256	jnz next_partition_3
		257
		258	mov eax,[ebx+0x1be+8+16+16] ; add relative start
		259	test eax,eax ; is there extended partition?
		260	jnz new_partition ; yes. read it
		261
		262	next_partition_3:
		263	push eax
		264	mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
		265	call scan_extended_types
		266	pop eax
		267	jnz end_partition_chain ; no. end chain
		268
		269	mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
		270	test eax,eax ; is there extended partition?
		271	jnz new_partition ; yes. read it
		272
		273	end_partition_chain:
		274	mov [partition_count],ecx
		275
		276	cmp edx,-1 ; found wanted partition?
		277	jnz hd_and_partition_ok ; yes. install it
		278	jmp problem_partition_or_fat
		279
		280	scan_partition_types:
		281	push ecx
		282	mov edi,partition_types
		283	mov ecx,partition_types_end-partition_types
		284	cld
		285	repne scasb ; is partition type ok?
		286	pop ecx
		287	ret
		288
		289	scan_extended_types:
		290	push ecx
		291	mov edi,extended_types
		292	mov ecx,extended_types_end-extended_types
		293	cld
		294	repne scasb ; is it extended partition?
		295	pop ecx
		296	ret
		297
		298	problem_fat_dec_count: ; bootsector is missing or another problem
		299	dec [partition_count] ; remove it from partition_count
		300
		301	problem_partition_or_fat:
		302	popad
		303
		304	problem_hd:
256	diamond	305	mov [fs_type],0
65	mario79	306	mov [hd1_status],0 ; free
		307	mov [problem_partition],1
		308	ret
		309
		310	hd_and_partition_ok:
		311	mov eax,edx
		312	mov [PARTITION_START],eax
256	diamond	313	mov edx, [PARTITION_END]
		314	sub edx, eax
		315	inc edx ; edx = length of partition
65	mario79	316
256	diamond	317	; mov [hd_setup],1
65	mario79	318	mov ebx,buffer
		319	call hd_read ; read boot sector of partition
256	diamond	320	cmp [hd_error], 0
		321	jz boot_read_ok
		322	cmp [fs_type], 7
		323	jnz problem_fat_dec_count
		324	; NTFS duplicates bootsector:
		325	; NT4/2k/XP+ saves bootsector copy in the end of disk
		326	; NT 3.51 saves bootsector copy in the middle of disk
		327	and [hd_error], 0
		328	mov eax, [PARTITION_END]
		329	call hd_read
		330	cmp [hd_error], 0
		331	jnz @f
		332	call ntfs_test_bootsec
		333	jnc boot_read_ok
		334	@@:
		335	and [hd_error], 0
		336	mov eax, edx
		337	shr eax, 1
		338	add eax, [PARTITION_START]
		339	call hd_read
		340	cmp [hd_error], 0
		341	jnz problem_fat_dec_count ; �� 졠...
		342	boot_read_ok:
		343	; mov [hd_setup], 0
		344	; if we are running on NTFS, check bootsector
		345	cmp [fs_type], 7
		346	jz ntfs_setup
74	mario79	347
65	mario79	348	cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
		349	jnz problem_fat_dec_count
		350
		351	movzx eax,word [ebx+0xe] ; sectors reserved
		352	add eax,[PARTITION_START]
		353	mov [FAT_START],eax ; fat_start = partition_start + reserved
		354
		355	movzx eax,byte [ebx+0xd] ; sectors per cluster
		356	mov [SECTORS_PER_CLUSTER],eax
		357
		358	movzx ecx,word [ebx+0xb] ; bytes per sector
		359	mov [BYTES_PER_SECTOR],ecx
		360
		361	movzx eax,word [ebx+0x11] ; count of rootdir entries (=0 fat32)
		362	mov edx,32
		363	mul edx
		364	dec ecx
		365	add eax,ecx ; round up if not equal count
		366	inc ecx ; bytes per sector
		367	div ecx
		368	mov [ROOT_SECTORS],eax ; count of rootdir sectors
		369
		370	movzx eax,word [ebx+0x16] ; sectors per fat <65536
		371	test eax,eax
		372	jnz fat16_fatsize
		373	mov eax,[ebx+0x24] ; sectors per fat
		374	fat16_fatsize:
		375	mov [SECTORS_PER_FAT],eax
		376
		377	movzx eax,byte [ebx+0x10] ; number of fats
		378	test eax,eax ; if 0 it's not fat partition
		379	jz problem_fat_dec_count
		380	mov [NUMBER_OF_FATS],eax
		381	imul eax,[SECTORS_PER_FAT]
		382	add eax,[FAT_START]
		383	mov [ROOT_START],eax ; rootdir = fat_start + fat_size * fat_count
		384	add eax,[ROOT_SECTORS] ; rootdir sectors should be 0 on fat32
		385	mov [DATA_START],eax ; data area = rootdir + rootdir_size
		386
		387	movzx eax,word [ebx+0x13] ; total sector count <65536
		388	test eax,eax
		389	jnz fat16_total
		390	mov eax,[ebx+0x20] ; total sector count
		391	fat16_total:
		392	add eax,[PARTITION_START]
		393	dec eax
		394	mov [PARTITION_END],eax
		395	inc eax
		396	sub eax,[DATA_START] ; eax = count of data sectors
		397	xor edx,edx
		398	div dword [SECTORS_PER_CLUSTER]
		399	inc eax
		400	mov [LAST_CLUSTER],eax
		401	dec eax ; cluster count
		402
		403	; limits by Microsoft Hardware White Paper v1.03
		404	cmp eax,4085 ; 0xff5
		405	jb problem_fat_dec_count ; fat12 not supported
		406	cmp eax,65525 ; 0xfff5
		407	jb fat16_partition
		408
		409	fat32_partition:
		410	mov eax,[ebx+0x2c] ; rootdir cluster
		411	mov [ROOT_CLUSTER],eax
		412	movzx eax,word [ebx+0x30] ; fs info sector
		413	add eax,[PARTITION_START]
		414	mov [ADR_FSINFO],eax
		415
		416	popad
		417
		418	mov [fatRESERVED],0x0FFFFFF6
		419	mov [fatBAD],0x0FFFFFF7
		420	mov [fatEND],0x0FFFFFF8
		421	mov [fatMASK],0x0FFFFFFF
256	diamond	422	mov [fs_type],32 ; Fat32
65	mario79	423	mov [hd1_status],0 ; free
		424	ret
		425
		426	fat16_partition:
		427	xor eax,eax
		428	mov [ROOT_CLUSTER],eax
		429
		430	popad
		431
		432	mov [fatRESERVED],0x0000FFF6
		433	mov [fatBAD],0x0000FFF7
		434	mov [fatEND],0x0000FFF8
		435	mov [fatMASK],0x0000FFFF
256	diamond	436	mov [fs_type],16 ; Fat16
65	mario79	437	mov [hd1_status],0 ; free
		438	ret

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(root)/kernel/trunk/fs/part_set.inc – Rev 277