]>
git.ipfire.org Git - people/ms/u-boot.git/blob - disk/part_dos.c
3 * Raymond Lo, lo@routefree.com
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
6 * SPDX-License-Identifier: GPL-2.0+
10 * Support for harddisk partitions.
12 * To be compatible with LinuxPPC and Apple we use the standard Apple
13 * SCSI disk partitioning scheme. For more information see:
14 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
23 #ifdef HAVE_BLOCK_DEVICE
25 #define DOS_PART_DEFAULT_SECTOR 512
27 /* Convert char[4] in little endian format to the host format integer
29 static inline unsigned int le32_to_int(unsigned char *le32
)
31 return ((le32
[3] << 24) +
38 static inline int is_extended(int part_type
)
40 return (part_type
== 0x5 ||
45 static inline int is_bootable(dos_partition_t
*p
)
47 return (p
->sys_ind
== 0xef) || (p
->boot_ind
== 0x80);
50 static void print_one_part(dos_partition_t
*p
, lbaint_t ext_part_sector
,
51 int part_num
, unsigned int disksig
)
53 lbaint_t lba_start
= ext_part_sector
+ le32_to_int (p
->start4
);
54 lbaint_t lba_size
= le32_to_int (p
->size4
);
56 printf("%3d\t%-10" LBAFlength
"u\t%-10" LBAFlength
57 "u\t%08x-%02x\t%02x%s%s\n",
58 part_num
, lba_start
, lba_size
, disksig
, part_num
, p
->sys_ind
,
59 (is_extended(p
->sys_ind
) ? " Extd" : ""),
60 (is_bootable(p
) ? " Boot" : ""));
63 static int test_block_type(unsigned char *buffer
)
66 struct dos_partition
*p
;
68 if((buffer
[DOS_PART_MAGIC_OFFSET
+ 0] != 0x55) ||
69 (buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) ) {
71 } /* no DOS Signature at all */
72 p
= (struct dos_partition
*)&buffer
[DOS_PART_TBL_OFFSET
];
73 for (slot
= 0; slot
< 3; slot
++) {
74 if (p
->boot_ind
!= 0 && p
->boot_ind
!= 0x80) {
76 (strncmp((char *)&buffer
[DOS_PBR_FSTYPE_OFFSET
],
78 strncmp((char *)&buffer
[DOS_PBR32_FSTYPE_OFFSET
],
80 return DOS_PBR
; /* is PBR */
86 return DOS_MBR
; /* Is MBR */
90 static int part_test_dos(struct blk_desc
*dev_desc
)
92 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr
, mbr
, dev_desc
->blksz
);
94 if (blk_dread(dev_desc
, 0, 1, (ulong
*)mbr
) != 1)
97 if (test_block_type((unsigned char *)mbr
) != DOS_MBR
)
100 if (dev_desc
->sig_type
== SIG_TYPE_NONE
&&
101 mbr
->unique_mbr_signature
!= 0) {
102 dev_desc
->sig_type
= SIG_TYPE_MBR
;
103 dev_desc
->mbr_sig
= mbr
->unique_mbr_signature
;
109 /* Print a partition that is relative to its Extended partition table
111 static void print_partition_extended(struct blk_desc
*dev_desc
,
112 lbaint_t ext_part_sector
,
114 int part_num
, unsigned int disksig
)
116 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
120 if (blk_dread(dev_desc
, ext_part_sector
, 1, (ulong
*)buffer
) != 1) {
121 printf ("** Can't read partition table on %d:" LBAFU
" **\n",
122 dev_desc
->devnum
, ext_part_sector
);
125 i
=test_block_type(buffer
);
127 printf ("bad MBR sector signature 0x%02x%02x\n",
128 buffer
[DOS_PART_MAGIC_OFFSET
],
129 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
133 if (!ext_part_sector
)
134 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
136 /* Print all primary/logical partitions */
137 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
138 for (i
= 0; i
< 4; i
++, pt
++) {
140 * fdisk does not show the extended partitions that
144 if ((pt
->sys_ind
!= 0) &&
145 (ext_part_sector
== 0 || !is_extended (pt
->sys_ind
)) ) {
146 print_one_part(pt
, ext_part_sector
, part_num
, disksig
);
149 /* Reverse engr the fdisk part# assignment rule! */
150 if ((ext_part_sector
== 0) ||
151 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
156 /* Follows the extended partitions */
157 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
158 for (i
= 0; i
< 4; i
++, pt
++) {
159 if (is_extended (pt
->sys_ind
)) {
161 = le32_to_int (pt
->start4
) + relative
;
163 print_partition_extended(dev_desc
, lba_start
,
164 ext_part_sector
== 0 ? lba_start
: relative
,
173 /* Print a partition that is relative to its Extended partition table
175 static int part_get_info_extended(struct blk_desc
*dev_desc
,
176 lbaint_t ext_part_sector
, lbaint_t relative
,
177 int part_num
, int which_part
,
178 disk_partition_t
*info
, unsigned int disksig
)
180 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
185 if (blk_dread(dev_desc
, ext_part_sector
, 1, (ulong
*)buffer
) != 1) {
186 printf ("** Can't read partition table on %d:" LBAFU
" **\n",
187 dev_desc
->devnum
, ext_part_sector
);
190 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
191 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
192 printf ("bad MBR sector signature 0x%02x%02x\n",
193 buffer
[DOS_PART_MAGIC_OFFSET
],
194 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
198 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
199 if (!ext_part_sector
)
200 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
203 /* Print all primary/logical partitions */
204 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
205 for (i
= 0; i
< 4; i
++, pt
++) {
207 * fdisk does not show the extended partitions that
210 if (((pt
->boot_ind
& ~0x80) == 0) &&
211 (pt
->sys_ind
!= 0) &&
212 (part_num
== which_part
) &&
213 (is_extended(pt
->sys_ind
) == 0)) {
214 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
215 info
->start
= (lbaint_t
)(ext_part_sector
+
216 le32_to_int(pt
->start4
));
217 info
->size
= (lbaint_t
)le32_to_int(pt
->size4
);
218 part_set_generic_name(dev_desc
, part_num
,
220 /* sprintf(info->type, "%d, pt->sys_ind); */
221 strcpy((char *)info
->type
, "U-Boot");
222 info
->bootable
= is_bootable(pt
);
223 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
224 sprintf(info
->uuid
, "%08x-%02x", disksig
, part_num
);
226 info
->sys_ind
= pt
->sys_ind
;
230 /* Reverse engr the fdisk part# assignment rule! */
231 if ((ext_part_sector
== 0) ||
232 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
237 /* Follows the extended partitions */
238 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
239 for (i
= 0; i
< 4; i
++, pt
++) {
240 if (is_extended (pt
->sys_ind
)) {
242 = le32_to_int (pt
->start4
) + relative
;
244 return part_get_info_extended(dev_desc
, lba_start
,
245 ext_part_sector
== 0 ? lba_start
: relative
,
246 part_num
, which_part
, info
, disksig
);
250 /* Check for DOS PBR if no partition is found */
251 dos_type
= test_block_type(buffer
);
253 if (dos_type
== DOS_PBR
) {
255 info
->size
= dev_desc
->lba
;
256 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
258 strcpy((char *)info
->type
, "U-Boot");
259 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
268 void part_print_dos(struct blk_desc
*dev_desc
)
270 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
271 print_partition_extended(dev_desc
, 0, 0, 1, 0);
274 int part_get_info_dos(struct blk_desc
*dev_desc
, int part
,
275 disk_partition_t
*info
)
277 return part_get_info_extended(dev_desc
, 0, 0, 1, part
, info
, 0);
280 int is_valid_dos_buf(void *buf
)
282 return test_block_type(buf
) == DOS_MBR
? 0 : -1;
285 int write_mbr_partition(struct blk_desc
*dev_desc
, void *buf
)
287 if (is_valid_dos_buf(buf
))
291 if (blk_dwrite(dev_desc
, 0, 1, buf
) != 1) {
292 printf("%s: failed writing '%s' (1 blks at 0x0)\n",
300 U_BOOT_PART_TYPE(dos
) = {
302 .part_type
= PART_TYPE_DOS
,
303 .max_entries
= DOS_ENTRY_NUMBERS
,
304 .get_info
= part_get_info_ptr(part_get_info_dos
),
305 .print
= part_print_ptr(part_print_dos
),
306 .test
= part_test_dos
,