]>
git.ipfire.org Git - 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 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
, int ext_part_sector
,
51 int part_num
, unsigned int disksig
)
53 int lba_start
= ext_part_sector
+ le32_to_int (p
->start4
);
54 int lba_size
= le32_to_int (p
->size4
);
56 printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n",
57 part_num
, lba_start
, lba_size
, disksig
, part_num
, p
->sys_ind
,
58 (is_extended(p
->sys_ind
) ? " Extd" : ""),
59 (is_bootable(p
) ? " Boot" : ""));
62 static int test_block_type(unsigned char *buffer
)
65 struct dos_partition
*p
;
67 if((buffer
[DOS_PART_MAGIC_OFFSET
+ 0] != 0x55) ||
68 (buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) ) {
70 } /* no DOS Signature at all */
71 p
= (struct dos_partition
*)&buffer
[DOS_PART_TBL_OFFSET
];
72 for (slot
= 0; slot
< 3; slot
++) {
73 if (p
->boot_ind
!= 0 && p
->boot_ind
!= 0x80) {
75 (strncmp((char *)&buffer
[DOS_PBR_FSTYPE_OFFSET
],
77 strncmp((char *)&buffer
[DOS_PBR32_FSTYPE_OFFSET
],
79 return DOS_PBR
; /* is PBR */
85 return DOS_MBR
; /* Is MBR */
89 int test_part_dos (block_dev_desc_t
*dev_desc
)
91 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
93 if (dev_desc
->block_read(dev_desc
->dev
, 0, 1, (ulong
*) buffer
) != 1)
96 if (test_block_type(buffer
) != DOS_MBR
)
102 /* Print a partition that is relative to its Extended partition table
104 static void print_partition_extended(block_dev_desc_t
*dev_desc
,
105 int ext_part_sector
, int relative
,
106 int part_num
, unsigned int disksig
)
108 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
112 if (dev_desc
->block_read(dev_desc
->dev
, ext_part_sector
, 1, (ulong
*) buffer
) != 1) {
113 printf ("** Can't read partition table on %d:%d **\n",
114 dev_desc
->dev
, ext_part_sector
);
117 i
=test_block_type(buffer
);
119 printf ("bad MBR sector signature 0x%02x%02x\n",
120 buffer
[DOS_PART_MAGIC_OFFSET
],
121 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
125 if (!ext_part_sector
)
126 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
128 /* Print all primary/logical partitions */
129 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
130 for (i
= 0; i
< 4; i
++, pt
++) {
132 * fdisk does not show the extended partitions that
136 if ((pt
->sys_ind
!= 0) &&
137 (ext_part_sector
== 0 || !is_extended (pt
->sys_ind
)) ) {
138 print_one_part(pt
, ext_part_sector
, part_num
, disksig
);
141 /* Reverse engr the fdisk part# assignment rule! */
142 if ((ext_part_sector
== 0) ||
143 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
148 /* Follows the extended partitions */
149 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
150 for (i
= 0; i
< 4; i
++, pt
++) {
151 if (is_extended (pt
->sys_ind
)) {
152 int lba_start
= le32_to_int (pt
->start4
) + relative
;
154 print_partition_extended(dev_desc
, lba_start
,
155 ext_part_sector
== 0 ? lba_start
: relative
,
164 /* Print a partition that is relative to its Extended partition table
166 static int get_partition_info_extended (block_dev_desc_t
*dev_desc
, int ext_part_sector
,
167 int relative
, int part_num
,
168 int which_part
, disk_partition_t
*info
,
169 unsigned int disksig
)
171 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
176 if (dev_desc
->block_read (dev_desc
->dev
, ext_part_sector
, 1, (ulong
*) buffer
) != 1) {
177 printf ("** Can't read partition table on %d:%d **\n",
178 dev_desc
->dev
, ext_part_sector
);
181 if (buffer
[DOS_PART_MAGIC_OFFSET
] != 0x55 ||
182 buffer
[DOS_PART_MAGIC_OFFSET
+ 1] != 0xaa) {
183 printf ("bad MBR sector signature 0x%02x%02x\n",
184 buffer
[DOS_PART_MAGIC_OFFSET
],
185 buffer
[DOS_PART_MAGIC_OFFSET
+ 1]);
189 #ifdef CONFIG_PARTITION_UUIDS
190 if (!ext_part_sector
)
191 disksig
= le32_to_int(&buffer
[DOS_PART_DISKSIG_OFFSET
]);
194 /* Print all primary/logical partitions */
195 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
196 for (i
= 0; i
< 4; i
++, pt
++) {
198 * fdisk does not show the extended partitions that
201 if (((pt
->boot_ind
& ~0x80) == 0) &&
202 (pt
->sys_ind
!= 0) &&
203 (part_num
== which_part
) &&
204 (is_extended(pt
->sys_ind
) == 0)) {
205 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
206 info
->start
= (lbaint_t
)(ext_part_sector
+
207 le32_to_int(pt
->start4
));
208 info
->size
= (lbaint_t
)le32_to_int(pt
->size4
);
209 switch(dev_desc
->if_type
) {
213 sprintf ((char *)info
->name
, "hd%c%d",
214 'a' + dev_desc
->dev
, part_num
);
217 sprintf ((char *)info
->name
, "sd%c%d",
218 'a' + dev_desc
->dev
, part_num
);
221 sprintf ((char *)info
->name
, "usbd%c%d",
222 'a' + dev_desc
->dev
, part_num
);
225 sprintf ((char *)info
->name
, "docd%c%d",
226 'a' + dev_desc
->dev
, part_num
);
229 sprintf ((char *)info
->name
, "xx%c%d",
230 'a' + dev_desc
->dev
, part_num
);
233 /* sprintf(info->type, "%d, pt->sys_ind); */
234 sprintf ((char *)info
->type
, "U-Boot");
235 info
->bootable
= is_bootable(pt
);
236 #ifdef CONFIG_PARTITION_UUIDS
237 sprintf(info
->uuid
, "%08x-%02x", disksig
, part_num
);
242 /* Reverse engr the fdisk part# assignment rule! */
243 if ((ext_part_sector
== 0) ||
244 (pt
->sys_ind
!= 0 && !is_extended (pt
->sys_ind
)) ) {
249 /* Follows the extended partitions */
250 pt
= (dos_partition_t
*) (buffer
+ DOS_PART_TBL_OFFSET
);
251 for (i
= 0; i
< 4; i
++, pt
++) {
252 if (is_extended (pt
->sys_ind
)) {
253 int lba_start
= le32_to_int (pt
->start4
) + relative
;
255 return get_partition_info_extended (dev_desc
, lba_start
,
256 ext_part_sector
== 0 ? lba_start
: relative
,
257 part_num
, which_part
, info
, disksig
);
261 /* Check for DOS PBR if no partition is found */
262 dos_type
= test_block_type(buffer
);
264 if (dos_type
== DOS_PBR
) {
266 info
->size
= dev_desc
->lba
;
267 info
->blksz
= DOS_PART_DEFAULT_SECTOR
;
269 sprintf ((char *)info
->type
, "U-Boot");
270 #ifdef CONFIG_PARTITION_UUIDS
279 void print_part_dos (block_dev_desc_t
*dev_desc
)
281 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
282 print_partition_extended(dev_desc
, 0, 0, 1, 0);
285 int get_partition_info_dos (block_dev_desc_t
*dev_desc
, int part
, disk_partition_t
* info
)
287 return get_partition_info_extended(dev_desc
, 0, 0, 1, part
, info
, 0);