]>
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
22 #ifdef HAVE_BLOCK_DEVICE
24 #define DOS_PART_DEFAULT_SECTOR 512
26 /* Convert char[4] in little endian format to the host format integer
28 static inline int le32_to_int(unsigned char *le32
)
30 return ((le32
[3] << 24) +
37 static inline int is_extended(int part_type
)
39 return (part_type
== 0x5 ||
44 static inline int is_bootable(dos_partition_t
*p
)
46 return p
->boot_ind
== 0x80;
49 static void print_one_part(dos_partition_t
*p
, int ext_part_sector
,
50 int part_num
, unsigned int disksig
)
52 int lba_start
= ext_part_sector
+ le32_to_int (p
->start4
);
53 int lba_size
= le32_to_int (p
->size4
);
55 printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n",
56 part_num
, lba_start
, lba_size
, disksig
, part_num
, p
->sys_ind
,
57 (is_extended(p
->sys_ind
) ? " Extd" : ""),
58 (is_bootable(p
) ? " Boot" : ""));
61 static int test_block_type(unsigned char *buffer
)
64 struct dos_partition
*p
;
66 if((buffer
[DOS_PART_MAGIC_OFFSET
+ 0] != 0x55) ||
67 (buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) ) {
69 } /* no DOS Signature at all */
70 p
= (struct dos_partition
*)&buffer
[DOS_PART_TBL_OFFSET
];
71 for (slot
= 0; slot
< 3; slot
++) {
72 if (p
->boot_ind
!= 0 && p
->boot_ind
!= 0x80) {
74 (strncmp((char *)&buffer
[DOS_PBR_FSTYPE_OFFSET
],
76 strncmp((char *)&buffer
[DOS_PBR32_FSTYPE_OFFSET
],
78 return DOS_PBR
; /* is PBR */
84 return DOS_MBR
; /* Is MBR */
88 int test_part_dos (block_dev_desc_t
*dev_desc
)
90 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
92 if (dev_desc
->block_read(dev_desc
->dev
, 0, 1, (ulong
*) buffer
) != 1)
95 if (test_block_type(buffer
) != DOS_MBR
)
101 /* Print a partition that is relative to its Extended partition table
103 static void print_partition_extended(block_dev_desc_t
*dev_desc
,
104 int ext_part_sector
, int relative
,
105 int part_num
, unsigned int disksig
)
107 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
111 if (dev_desc
->block_read(dev_desc
->dev
, ext_part_sector
, 1, (ulong
*) buffer
) != 1) {
112 printf ("** Can't read partition table on %d:%d **\n",
113 dev_desc
->dev
, ext_part_sector
);
116 i
=test_block_type(buffer
);
118 printf ("bad MBR sector signature 0x%02x%02x\n",
119 buffer
[DOS_PART_MAGIC_OFFSET
],
120 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
124 if (!ext_part_sector
)
125 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
127 /* Print all primary/logical partitions */
128 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
129 for (i
= 0; i
< 4; i
++, pt
++) {
131 * fdisk does not show the extended partitions that
135 if ((pt
->sys_ind
!= 0) &&
136 (ext_part_sector
== 0 || !is_extended (pt
->sys_ind
)) ) {
137 print_one_part(pt
, ext_part_sector
, part_num
, disksig
);
140 /* Reverse engr the fdisk part# assignment rule! */
141 if ((ext_part_sector
== 0) ||
142 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
147 /* Follows the extended partitions */
148 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
149 for (i
= 0; i
< 4; i
++, pt
++) {
150 if (is_extended (pt
->sys_ind
)) {
151 int lba_start
= le32_to_int (pt
->start4
) + relative
;
153 print_partition_extended(dev_desc
, lba_start
,
154 ext_part_sector
== 0 ? lba_start
: relative
,
163 /* Print a partition that is relative to its Extended partition table
165 static int get_partition_info_extended (block_dev_desc_t
*dev_desc
, int ext_part_sector
,
166 int relative
, int part_num
,
167 int which_part
, disk_partition_t
*info
,
168 unsigned int disksig
)
170 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
175 if (dev_desc
->block_read (dev_desc
->dev
, ext_part_sector
, 1, (ulong
*) buffer
) != 1) {
176 printf ("** Can't read partition table on %d:%d **\n",
177 dev_desc
->dev
, ext_part_sector
);
180 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
181 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
182 printf ("bad MBR sector signature 0x%02x%02x\n",
183 buffer
[DOS_PART_MAGIC_OFFSET
],
184 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
188 #ifdef CONFIG_PARTITION_UUIDS
189 if (!ext_part_sector
)
190 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
193 /* Print all primary/logical partitions */
194 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
195 for (i
= 0; i
< 4; i
++, pt
++) {
197 * fdisk does not show the extended partitions that
200 if (((pt
->boot_ind
& ~0x80) == 0) &&
201 (pt
->sys_ind
!= 0) &&
202 (part_num
== which_part
) &&
203 (is_extended(pt
->sys_ind
) == 0)) {
204 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
205 info
->start
= (lbaint_t
)(ext_part_sector
+
206 le32_to_int(pt
->start4
));
207 info
->size
= (lbaint_t
)le32_to_int(pt
->size4
);
208 switch(dev_desc
->if_type
) {
212 sprintf ((char *)info
->name
, "hd%c%d",
213 'a' + dev_desc
->dev
, part_num
);
216 sprintf ((char *)info
->name
, "sd%c%d",
217 'a' + dev_desc
->dev
, part_num
);
220 sprintf ((char *)info
->name
, "usbd%c%d",
221 'a' + dev_desc
->dev
, part_num
);
224 sprintf ((char *)info
->name
, "docd%c%d",
225 'a' + dev_desc
->dev
, part_num
);
228 sprintf ((char *)info
->name
, "xx%c%d",
229 'a' + dev_desc
->dev
, part_num
);
232 /* sprintf(info->type, "%d, pt->sys_ind); */
233 sprintf ((char *)info
->type
, "U-Boot");
234 info
->bootable
= is_bootable(pt
);
235 #ifdef CONFIG_PARTITION_UUIDS
236 sprintf(info
->uuid
, "%08x-%02x", disksig
, part_num
);
241 /* Reverse engr the fdisk part# assignment rule! */
242 if ((ext_part_sector
== 0) ||
243 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
248 /* Follows the extended partitions */
249 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
250 for (i
= 0; i
< 4; i
++, pt
++) {
251 if (is_extended (pt
->sys_ind
)) {
252 int lba_start
= le32_to_int (pt
->start4
) + relative
;
254 return get_partition_info_extended (dev_desc
, lba_start
,
255 ext_part_sector
== 0 ? lba_start
: relative
,
256 part_num
, which_part
, info
, disksig
);
260 /* Check for DOS PBR if no partition is found */
261 dos_type
= test_block_type(buffer
);
263 if (dos_type
== DOS_PBR
) {
265 info
->size
= dev_desc
->lba
;
266 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
268 sprintf ((char *)info
->type
, "U-Boot");
269 #ifdef CONFIG_PARTITION_UUIDS
278 void print_part_dos (block_dev_desc_t
*dev_desc
)
280 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
281 print_partition_extended(dev_desc
, 0, 0, 1, 0);
284 int get_partition_info_dos (block_dev_desc_t
*dev_desc
, int part
, disk_partition_t
* info
)
286 return get_partition_info_extended(dev_desc
, 0, 0, 1, part
, info
, 0);