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 int test_part_dos (block_dev_desc_t *dev_desc)
92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
94 if (dev_desc->block_read(dev_desc->dev, 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(block_dev_desc_t *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->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
115 printf ("** Can't read partition table on %d:" LBAFU " **\n",
116 dev_desc->dev, ext_part_sector);
119 i=test_block_type(buffer);
121 printf ("bad MBR sector signature 0x%02x%02x\n",
122 buffer[DOS_PART_MAGIC_OFFSET],
123 buffer[DOS_PART_MAGIC_OFFSET + 1]);
127 if (!ext_part_sector)
128 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
130 /* Print all primary/logical partitions */
131 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
132 for (i = 0; i < 4; i++, pt++) {
134 * fdisk does not show the extended partitions that
138 if ((pt->sys_ind != 0) &&
139 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
140 print_one_part(pt, ext_part_sector, part_num, disksig);
143 /* Reverse engr the fdisk part# assignment rule! */
144 if ((ext_part_sector == 0) ||
145 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
150 /* Follows the extended partitions */
151 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
152 for (i = 0; i < 4; i++, pt++) {
153 if (is_extended (pt->sys_ind)) {
155 = le32_to_int (pt->start4) + relative;
157 print_partition_extended(dev_desc, lba_start,
158 ext_part_sector == 0 ? lba_start : relative,
167 /* Print a partition that is relative to its Extended partition table
169 static int get_partition_info_extended (block_dev_desc_t *dev_desc,
170 lbaint_t ext_part_sector,
171 lbaint_t relative, int part_num,
172 int which_part, disk_partition_t *info,
173 unsigned int disksig)
175 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
180 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
181 printf ("** Can't read partition table on %d:" LBAFU " **\n",
182 dev_desc->dev, ext_part_sector);
185 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
186 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
187 printf ("bad MBR sector signature 0x%02x%02x\n",
188 buffer[DOS_PART_MAGIC_OFFSET],
189 buffer[DOS_PART_MAGIC_OFFSET + 1]);
193 #ifdef CONFIG_PARTITION_UUIDS
194 if (!ext_part_sector)
195 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
198 /* Print all primary/logical partitions */
199 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
200 for (i = 0; i < 4; i++, pt++) {
202 * fdisk does not show the extended partitions that
205 if (((pt->boot_ind & ~0x80) == 0) &&
206 (pt->sys_ind != 0) &&
207 (part_num == which_part) &&
208 (is_extended(pt->sys_ind) == 0)) {
209 info->blksz = DOS_PART_DEFAULT_SECTOR;
210 info->start = (lbaint_t)(ext_part_sector +
211 le32_to_int(pt->start4));
212 info->size = (lbaint_t)le32_to_int(pt->size4);
213 switch(dev_desc->if_type) {
217 sprintf ((char *)info->name, "hd%c%d",
218 'a' + dev_desc->dev, part_num);
221 sprintf ((char *)info->name, "sd%c%d",
222 'a' + dev_desc->dev, part_num);
225 sprintf ((char *)info->name, "usbd%c%d",
226 'a' + dev_desc->dev, part_num);
229 sprintf ((char *)info->name, "docd%c%d",
230 'a' + dev_desc->dev, part_num);
233 sprintf ((char *)info->name, "xx%c%d",
234 'a' + dev_desc->dev, part_num);
237 /* sprintf(info->type, "%d, pt->sys_ind); */
238 sprintf ((char *)info->type, "U-Boot");
239 info->bootable = is_bootable(pt);
240 #ifdef CONFIG_PARTITION_UUIDS
241 sprintf(info->uuid, "%08x-%02x", disksig, part_num);
246 /* Reverse engr the fdisk part# assignment rule! */
247 if ((ext_part_sector == 0) ||
248 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
253 /* Follows the extended partitions */
254 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
255 for (i = 0; i < 4; i++, pt++) {
256 if (is_extended (pt->sys_ind)) {
258 = le32_to_int (pt->start4) + relative;
260 return get_partition_info_extended (dev_desc, lba_start,
261 ext_part_sector == 0 ? lba_start : relative,
262 part_num, which_part, info, disksig);
266 /* Check for DOS PBR if no partition is found */
267 dos_type = test_block_type(buffer);
269 if (dos_type == DOS_PBR) {
271 info->size = dev_desc->lba;
272 info->blksz = DOS_PART_DEFAULT_SECTOR;
274 sprintf ((char *)info->type, "U-Boot");
275 #ifdef CONFIG_PARTITION_UUIDS
284 void print_part_dos (block_dev_desc_t *dev_desc)
286 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
287 print_partition_extended(dev_desc, 0, 0, 1, 0);
290 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
292 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);