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 CONFIG_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 #ifndef CONFIG_SPL_BUILD
93 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, 1);
95 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
98 if (test_block_type((unsigned char *)mbr) != DOS_MBR)
101 if (dev_desc->sig_type == SIG_TYPE_NONE &&
102 mbr->unique_mbr_signature != 0) {
103 dev_desc->sig_type = SIG_TYPE_MBR;
104 dev_desc->mbr_sig = mbr->unique_mbr_signature;
107 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
109 if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
112 if (test_block_type(buffer) != DOS_MBR)
119 /* Print a partition that is relative to its Extended partition table
121 static void print_partition_extended(struct blk_desc *dev_desc,
122 lbaint_t ext_part_sector,
124 int part_num, unsigned int disksig)
126 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
130 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
131 printf ("** Can't read partition table on %d:" LBAFU " **\n",
132 dev_desc->devnum, ext_part_sector);
135 i=test_block_type(buffer);
137 printf ("bad MBR sector signature 0x%02x%02x\n",
138 buffer[DOS_PART_MAGIC_OFFSET],
139 buffer[DOS_PART_MAGIC_OFFSET + 1]);
143 if (!ext_part_sector)
144 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
146 /* Print all primary/logical partitions */
147 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
148 for (i = 0; i < 4; i++, pt++) {
150 * fdisk does not show the extended partitions that
154 if ((pt->sys_ind != 0) &&
155 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
156 print_one_part(pt, ext_part_sector, part_num, disksig);
159 /* Reverse engr the fdisk part# assignment rule! */
160 if ((ext_part_sector == 0) ||
161 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
166 /* Follows the extended partitions */
167 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
168 for (i = 0; i < 4; i++, pt++) {
169 if (is_extended (pt->sys_ind)) {
171 = le32_to_int (pt->start4) + relative;
173 print_partition_extended(dev_desc, lba_start,
174 ext_part_sector == 0 ? lba_start : relative,
183 /* Print a partition that is relative to its Extended partition table
185 static int part_get_info_extended(struct blk_desc *dev_desc,
186 lbaint_t ext_part_sector, lbaint_t relative,
187 int part_num, int which_part,
188 disk_partition_t *info, unsigned int disksig)
190 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
195 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
196 printf ("** Can't read partition table on %d:" LBAFU " **\n",
197 dev_desc->devnum, ext_part_sector);
200 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
201 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
202 printf ("bad MBR sector signature 0x%02x%02x\n",
203 buffer[DOS_PART_MAGIC_OFFSET],
204 buffer[DOS_PART_MAGIC_OFFSET + 1]);
208 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
209 if (!ext_part_sector)
210 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
213 /* Print all primary/logical partitions */
214 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
215 for (i = 0; i < 4; i++, pt++) {
217 * fdisk does not show the extended partitions that
220 if (((pt->boot_ind & ~0x80) == 0) &&
221 (pt->sys_ind != 0) &&
222 (part_num == which_part) &&
223 (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) {
224 info->blksz = DOS_PART_DEFAULT_SECTOR;
225 info->start = (lbaint_t)(ext_part_sector +
226 le32_to_int(pt->start4));
227 info->size = (lbaint_t)le32_to_int(pt->size4);
228 part_set_generic_name(dev_desc, part_num,
230 /* sprintf(info->type, "%d, pt->sys_ind); */
231 strcpy((char *)info->type, "U-Boot");
232 info->bootable = is_bootable(pt);
233 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
234 sprintf(info->uuid, "%08x-%02x", disksig, part_num);
236 info->sys_ind = pt->sys_ind;
240 /* Reverse engr the fdisk part# assignment rule! */
241 if ((ext_part_sector == 0) ||
242 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
247 /* Follows the extended partitions */
248 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
249 for (i = 0; i < 4; i++, pt++) {
250 if (is_extended (pt->sys_ind)) {
252 = le32_to_int (pt->start4) + relative;
254 return part_get_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 strcpy((char *)info->type, "U-Boot");
269 #if CONFIG_IS_ENABLED(PARTITION_UUIDS)
278 void part_print_dos(struct blk_desc *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 part_get_info_dos(struct blk_desc *dev_desc, int part,
285 disk_partition_t *info)
287 return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
290 int is_valid_dos_buf(void *buf)
292 return test_block_type(buf) == DOS_MBR ? 0 : -1;
295 int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
297 if (is_valid_dos_buf(buf))
301 if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
302 printf("%s: failed writing '%s' (1 blks at 0x0)\n",
310 U_BOOT_PART_TYPE(dos) = {
312 .part_type = PART_TYPE_DOS,
313 .max_entries = DOS_ENTRY_NUMBERS,
314 .get_info = part_get_info_ptr(part_get_info_dos),
315 .print = part_print_ptr(part_print_dos),
316 .test = part_test_dos,