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CommitLineData
fe8c2806
WD
1/*
2 * (C) Copyright 2001
3 * Raymond Lo, lo@routefree.com
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
1a459660 6 * SPDX-License-Identifier: GPL-2.0+
fe8c2806
WD
7 */
8
9/*
10 * Support for harddisk partitions.
11 *
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
15 */
16
17#include <common.h>
18#include <command.h>
19#include <ide.h>
cf92e05c 20#include <memalign.h>
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21#include "part_dos.h"
22
2c1af9dc 23#ifdef HAVE_BLOCK_DEVICE
fe8c2806 24
4a36be9b
DD
25#define DOS_PART_DEFAULT_SECTOR 512
26
fe8c2806
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27/* Convert char[4] in little endian format to the host format integer
28 */
d29892ba 29static inline unsigned int le32_to_int(unsigned char *le32)
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30{
31 return ((le32[3] << 24) +
32 (le32[2] << 16) +
33 (le32[1] << 8) +
34 le32[0]
35 );
36}
37
38static inline int is_extended(int part_type)
39{
40 return (part_type == 0x5 ||
41 part_type == 0xf ||
42 part_type == 0x85);
43}
44
40e0e568
RH
45static inline int is_bootable(dos_partition_t *p)
46{
eefa0a64 47 return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
40e0e568
RH
48}
49
d29892ba 50static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
e2e9b378 51 int part_num, unsigned int disksig)
fe8c2806 52{
d29892ba
SM
53 lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
54 lbaint_t lba_size = le32_to_int (p->size4);
fe8c2806 55
d29892ba
SM
56 printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
57 "u\t%08x-%02x\t%02x%s%s\n",
e2e9b378 58 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
40e0e568
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59 (is_extended(p->sys_ind) ? " Extd" : ""),
60 (is_bootable(p) ? " Boot" : ""));
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61}
62
7205e407
WD
63static int test_block_type(unsigned char *buffer)
64{
9d956e0f
EE
65 int slot;
66 struct dos_partition *p;
67
7205e407
WD
68 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
69 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
70 return (-1);
71 } /* no DOS Signature at all */
9d956e0f
EE
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) {
75 if (!slot &&
76 (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
77 "FAT", 3) == 0 ||
78 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
79 "FAT32", 5) == 0)) {
80 return DOS_PBR; /* is PBR */
81 } else {
82 return -1;
83 }
84 }
66c2d73c 85 }
7205e407
WD
86 return DOS_MBR; /* Is MBR */
87}
88
fe8c2806 89
084bf4c2 90static int part_test_dos(struct blk_desc *dev_desc)
fe8c2806 91{
dec049d9 92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
fe8c2806 93
2a981dc2 94 if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
d1efb644
SW
95 return -1;
96
97 if (test_block_type(buffer) != DOS_MBR)
98 return -1;
99
100 return 0;
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101}
102
103/* Print a partition that is relative to its Extended partition table
104 */
4101f687 105static void print_partition_extended(struct blk_desc *dev_desc,
d29892ba
SM
106 lbaint_t ext_part_sector,
107 lbaint_t relative,
e2e9b378 108 int part_num, unsigned int disksig)
fe8c2806 109{
dec049d9 110 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
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111 dos_partition_t *pt;
112 int i;
113
2a981dc2 114 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
d29892ba 115 printf ("** Can't read partition table on %d:" LBAFU " **\n",
bcce53d0 116 dev_desc->devnum, ext_part_sector);
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117 return;
118 }
7205e407 119 i=test_block_type(buffer);
d1efb644 120 if (i != DOS_MBR) {
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121 printf ("bad MBR sector signature 0x%02x%02x\n",
122 buffer[DOS_PART_MAGIC_OFFSET],
123 buffer[DOS_PART_MAGIC_OFFSET + 1]);
124 return;
125 }
d1efb644 126
e2e9b378
SW
127 if (!ext_part_sector)
128 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
129
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130 /* Print all primary/logical partitions */
131 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
132 for (i = 0; i < 4; i++, pt++) {
133 /*
8bde7f77 134 * fdisk does not show the extended partitions that
fe8c2806
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135 * are not in the MBR
136 */
137
138 if ((pt->sys_ind != 0) &&
139 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
e2e9b378 140 print_one_part(pt, ext_part_sector, part_num, disksig);
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141 }
142
143 /* Reverse engr the fdisk part# assignment rule! */
144 if ((ext_part_sector == 0) ||
145 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
146 part_num++;
147 }
148 }
149
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)) {
d29892ba
SM
154 lbaint_t lba_start
155 = le32_to_int (pt->start4) + relative;
fe8c2806 156
304b5711
SW
157 print_partition_extended(dev_desc, lba_start,
158 ext_part_sector == 0 ? lba_start : relative,
e2e9b378 159 part_num, disksig);
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160 }
161 }
162
163 return;
164}
165
166
167/* Print a partition that is relative to its Extended partition table
168 */
3e8bd469
SG
169static int part_get_info_extended(struct blk_desc *dev_desc,
170 lbaint_t ext_part_sector, lbaint_t relative,
171 int part_num, int which_part,
172 disk_partition_t *info, unsigned int disksig)
fe8c2806 173{
dec049d9 174 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
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175 dos_partition_t *pt;
176 int i;
4a36be9b 177 int dos_type;
fe8c2806 178
2a981dc2 179 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
d29892ba 180 printf ("** Can't read partition table on %d:" LBAFU " **\n",
bcce53d0 181 dev_desc->devnum, ext_part_sector);
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182 return -1;
183 }
184 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
185 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
186 printf ("bad MBR sector signature 0x%02x%02x\n",
187 buffer[DOS_PART_MAGIC_OFFSET],
188 buffer[DOS_PART_MAGIC_OFFSET + 1]);
189 return -1;
190 }
191
b331cd62 192#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
d27b5f93
SW
193 if (!ext_part_sector)
194 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
195#endif
196
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197 /* Print all primary/logical partitions */
198 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
199 for (i = 0; i < 4; i++, pt++) {
200 /*
8bde7f77
WD
201 * fdisk does not show the extended partitions that
202 * are not in the MBR
fe8c2806 203 */
78f4ca79
DM
204 if (((pt->boot_ind & ~0x80) == 0) &&
205 (pt->sys_ind != 0) &&
7f70e853
WD
206 (part_num == which_part) &&
207 (is_extended(pt->sys_ind) == 0)) {
4a36be9b 208 info->blksz = DOS_PART_DEFAULT_SECTOR;
e04350d2
SR
209 info->start = (lbaint_t)(ext_part_sector +
210 le32_to_int(pt->start4));
211 info->size = (lbaint_t)le32_to_int(pt->size4);
da2ee24d
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212 part_set_generic_name(dev_desc, part_num,
213 (char *)info->name);
fe8c2806 214 /* sprintf(info->type, "%d, pt->sys_ind); */
192bc694 215 strcpy((char *)info->type, "U-Boot");
40e0e568 216 info->bootable = is_bootable(pt);
b331cd62 217#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
d27b5f93
SW
218 sprintf(info->uuid, "%08x-%02x", disksig, part_num);
219#endif
f0fb4fa7 220 info->sys_ind = pt->sys_ind;
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221 return 0;
222 }
223
224 /* Reverse engr the fdisk part# assignment rule! */
225 if ((ext_part_sector == 0) ||
226 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
227 part_num++;
228 }
229 }
230
231 /* Follows the extended partitions */
232 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
233 for (i = 0; i < 4; i++, pt++) {
234 if (is_extended (pt->sys_ind)) {
d29892ba
SM
235 lbaint_t lba_start
236 = le32_to_int (pt->start4) + relative;
fe8c2806 237
3e8bd469 238 return part_get_info_extended(dev_desc, lba_start,
fe8c2806 239 ext_part_sector == 0 ? lba_start : relative,
d27b5f93 240 part_num, which_part, info, disksig);
fe8c2806
WD
241 }
242 }
4a36be9b
DD
243
244 /* Check for DOS PBR if no partition is found */
245 dos_type = test_block_type(buffer);
246
247 if (dos_type == DOS_PBR) {
248 info->start = 0;
249 info->size = dev_desc->lba;
250 info->blksz = DOS_PART_DEFAULT_SECTOR;
251 info->bootable = 0;
192bc694 252 strcpy((char *)info->type, "U-Boot");
b331cd62 253#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
4a36be9b
DD
254 info->uuid[0] = 0;
255#endif
256 return 0;
257 }
258
fe8c2806
WD
259 return -1;
260}
261
084bf4c2 262void part_print_dos(struct blk_desc *dev_desc)
fe8c2806 263{
e2e9b378
SW
264 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
265 print_partition_extended(dev_desc, 0, 0, 1, 0);
fe8c2806
WD
266}
267
3e8bd469
SG
268int part_get_info_dos(struct blk_desc *dev_desc, int part,
269 disk_partition_t *info)
fe8c2806 270{
3e8bd469 271 return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
fe8c2806
WD
272}
273
b6dd69a4
PK
274int is_valid_dos_buf(void *buf)
275{
276 return test_block_type(buf) == DOS_MBR ? 0 : -1;
277}
278
279int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
280{
281 if (is_valid_dos_buf(buf))
282 return -1;
283
284 /* write MBR */
285 if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
286 printf("%s: failed writing '%s' (1 blks at 0x0)\n",
287 __func__, "MBR");
288 return 1;
289 }
290
291 return 0;
292}
293
96e5b03c
SG
294U_BOOT_PART_TYPE(dos) = {
295 .name = "DOS",
296 .part_type = PART_TYPE_DOS,
87b8530f 297 .max_entries = DOS_ENTRY_NUMBERS,
3e8bd469 298 .get_info = part_get_info_ptr(part_get_info_dos),
084bf4c2
SG
299 .print = part_print_ptr(part_print_dos),
300 .test = part_test_dos,
96e5b03c 301};
fe8c2806 302
cde5c64d 303#endif