]>
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
->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 test_part_dos(struct blk_desc
*dev_desc
)
92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
94 if (dev_desc
->block_read(dev_desc
, 0, 1, (ulong
*)buffer
) != 1)
97 if (test_block_type(buffer
) != DOS_MBR
)
103 /* Print a partition that is relative to its Extended partition table
105 static void print_partition_extended(struct blk_desc
*dev_desc
,
106 lbaint_t ext_part_sector
,
108 int part_num
, unsigned int disksig
)
110 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
114 if (dev_desc
->block_read(dev_desc
, ext_part_sector
, 1,
115 (ulong
*)buffer
) != 1) {
116 printf ("** Can't read partition table on %d:" LBAFU
" **\n",
117 dev_desc
->devnum
, ext_part_sector
);
120 i
=test_block_type(buffer
);
122 printf ("bad MBR sector signature 0x%02x%02x\n",
123 buffer
[DOS_PART_MAGIC_OFFSET
],
124 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
128 if (!ext_part_sector
)
129 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
131 /* Print all primary/logical partitions */
132 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
133 for (i
= 0; i
< 4; i
++, pt
++) {
135 * fdisk does not show the extended partitions that
139 if ((pt
->sys_ind
!= 0) &&
140 (ext_part_sector
== 0 || !is_extended (pt
->sys_ind
)) ) {
141 print_one_part(pt
, ext_part_sector
, part_num
, disksig
);
144 /* Reverse engr the fdisk part# assignment rule! */
145 if ((ext_part_sector
== 0) ||
146 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
151 /* Follows the extended partitions */
152 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
153 for (i
= 0; i
< 4; i
++, pt
++) {
154 if (is_extended (pt
->sys_ind
)) {
156 = le32_to_int (pt
->start4
) + relative
;
158 print_partition_extended(dev_desc
, lba_start
,
159 ext_part_sector
== 0 ? lba_start
: relative
,
168 /* Print a partition that is relative to its Extended partition table
170 static int part_get_info_extended(struct blk_desc
*dev_desc
,
171 lbaint_t ext_part_sector
, lbaint_t relative
,
172 int part_num
, int which_part
,
173 disk_partition_t
*info
, unsigned int disksig
)
175 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
180 if (dev_desc
->block_read(dev_desc
, ext_part_sector
, 1,
181 (ulong
*)buffer
) != 1) {
182 printf ("** Can't read partition table on %d:" LBAFU
" **\n",
183 dev_desc
->devnum
, ext_part_sector
);
186 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
187 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
188 printf ("bad MBR sector signature 0x%02x%02x\n",
189 buffer
[DOS_PART_MAGIC_OFFSET
],
190 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
194 #ifdef CONFIG_PARTITION_UUIDS
195 if (!ext_part_sector
)
196 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
199 /* Print all primary/logical partitions */
200 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
201 for (i
= 0; i
< 4; i
++, pt
++) {
203 * fdisk does not show the extended partitions that
206 if (((pt
->boot_ind
& ~0x80) == 0) &&
207 (pt
->sys_ind
!= 0) &&
208 (part_num
== which_part
) &&
209 (is_extended(pt
->sys_ind
) == 0)) {
210 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
211 info
->start
= (lbaint_t
)(ext_part_sector
+
212 le32_to_int(pt
->start4
));
213 info
->size
= (lbaint_t
)le32_to_int(pt
->size4
);
214 switch(dev_desc
->if_type
) {
218 sprintf((char *)info
->name
, "hd%c%d",
219 'a' + dev_desc
->devnum
,
223 sprintf((char *)info
->name
, "sd%c%d",
224 'a' + dev_desc
->devnum
,
228 sprintf((char *)info
->name
, "usbd%c%d",
229 'a' + dev_desc
->devnum
,
233 sprintf((char *)info
->name
, "docd%c%d",
234 'a' + dev_desc
->devnum
,
238 sprintf((char *)info
->name
, "xx%c%d",
239 'a' + dev_desc
->devnum
,
243 /* sprintf(info->type, "%d, pt->sys_ind); */
244 strcpy((char *)info
->type
, "U-Boot");
245 info
->bootable
= is_bootable(pt
);
246 #ifdef CONFIG_PARTITION_UUIDS
247 sprintf(info
->uuid
, "%08x-%02x", disksig
, part_num
);
252 /* Reverse engr the fdisk part# assignment rule! */
253 if ((ext_part_sector
== 0) ||
254 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
259 /* Follows the extended partitions */
260 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
261 for (i
= 0; i
< 4; i
++, pt
++) {
262 if (is_extended (pt
->sys_ind
)) {
264 = le32_to_int (pt
->start4
) + relative
;
266 return part_get_info_extended(dev_desc
, lba_start
,
267 ext_part_sector
== 0 ? lba_start
: relative
,
268 part_num
, which_part
, info
, disksig
);
272 /* Check for DOS PBR if no partition is found */
273 dos_type
= test_block_type(buffer
);
275 if (dos_type
== DOS_PBR
) {
277 info
->size
= dev_desc
->lba
;
278 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
280 strcpy((char *)info
->type
, "U-Boot");
281 #ifdef CONFIG_PARTITION_UUIDS
290 void print_part_dos(struct blk_desc
*dev_desc
)
292 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
293 print_partition_extended(dev_desc
, 0, 0, 1, 0);
296 int part_get_info_dos(struct blk_desc
*dev_desc
, int part
,
297 disk_partition_t
*info
)
299 return part_get_info_extended(dev_desc
, 0, 0, 1, part
, info
, 0);
302 U_BOOT_PART_TYPE(dos
) = {
304 .part_type
= PART_TYPE_DOS
,
305 .get_info
= part_get_info_ptr(part_get_info_dos
),
306 .print
= part_print_ptr(print_part_dos
),
307 .test
= test_part_dos
,