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dm: block: Rename device number member dev to devnum
[people/ms/u-boot.git] / disk / part_dos.c
CommitLineData
fe8c2806
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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+
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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{
47 return p->boot_ind == 0x80;
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
RH
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
96e5b03c 90static int test_part_dos(struct blk_desc *dev_desc)
fe8c2806 91{
dec049d9 92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
fe8c2806 93
7c4213f6 94 if (dev_desc->block_read(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
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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
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SW
114 if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
115 (ulong *)buffer) != 1) {
d29892ba 116 printf ("** Can't read partition table on %d:" LBAFU " **\n",
bcce53d0 117 dev_desc->devnum, ext_part_sector);
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118 return;
119 }
7205e407 120 i=test_block_type(buffer);
d1efb644 121 if (i != DOS_MBR) {
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122 printf ("bad MBR sector signature 0x%02x%02x\n",
123 buffer[DOS_PART_MAGIC_OFFSET],
124 buffer[DOS_PART_MAGIC_OFFSET + 1]);
125 return;
126 }
d1efb644 127
e2e9b378
SW
128 if (!ext_part_sector)
129 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
130
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131 /* Print all primary/logical partitions */
132 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
133 for (i = 0; i < 4; i++, pt++) {
134 /*
8bde7f77 135 * fdisk does not show the extended partitions that
fe8c2806
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136 * are not in the MBR
137 */
138
139 if ((pt->sys_ind != 0) &&
140 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
e2e9b378 141 print_one_part(pt, ext_part_sector, part_num, disksig);
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142 }
143
144 /* Reverse engr the fdisk part# assignment rule! */
145 if ((ext_part_sector == 0) ||
146 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
147 part_num++;
148 }
149 }
150
151 /* Follows the extended partitions */
152 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
153 for (i = 0; i < 4; i++, pt++) {
154 if (is_extended (pt->sys_ind)) {
d29892ba
SM
155 lbaint_t lba_start
156 = le32_to_int (pt->start4) + relative;
fe8c2806 157
304b5711
SW
158 print_partition_extended(dev_desc, lba_start,
159 ext_part_sector == 0 ? lba_start : relative,
e2e9b378 160 part_num, disksig);
fe8c2806
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161 }
162 }
163
164 return;
165}
166
167
168/* Print a partition that is relative to its Extended partition table
169 */
3e8bd469
SG
170static int part_get_info_extended(struct blk_desc *dev_desc,
171 lbaint_t ext_part_sector, lbaint_t relative,
172 int part_num, int which_part,
173 disk_partition_t *info, unsigned int disksig)
fe8c2806 174{
dec049d9 175 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
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176 dos_partition_t *pt;
177 int i;
4a36be9b 178 int dos_type;
fe8c2806 179
7c4213f6
SW
180 if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
181 (ulong *)buffer) != 1) {
d29892ba 182 printf ("** Can't read partition table on %d:" LBAFU " **\n",
bcce53d0 183 dev_desc->devnum, ext_part_sector);
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184 return -1;
185 }
186 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
187 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
188 printf ("bad MBR sector signature 0x%02x%02x\n",
189 buffer[DOS_PART_MAGIC_OFFSET],
190 buffer[DOS_PART_MAGIC_OFFSET + 1]);
191 return -1;
192 }
193
d27b5f93
SW
194#ifdef CONFIG_PARTITION_UUIDS
195 if (!ext_part_sector)
196 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
197#endif
198
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199 /* Print all primary/logical partitions */
200 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
201 for (i = 0; i < 4; i++, pt++) {
202 /*
8bde7f77
WD
203 * fdisk does not show the extended partitions that
204 * are not in the MBR
fe8c2806 205 */
78f4ca79
DM
206 if (((pt->boot_ind & ~0x80) == 0) &&
207 (pt->sys_ind != 0) &&
7f70e853
WD
208 (part_num == which_part) &&
209 (is_extended(pt->sys_ind) == 0)) {
4a36be9b 210 info->blksz = DOS_PART_DEFAULT_SECTOR;
e04350d2
SR
211 info->start = (lbaint_t)(ext_part_sector +
212 le32_to_int(pt->start4));
213 info->size = (lbaint_t)le32_to_int(pt->size4);
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214 switch(dev_desc->if_type) {
215 case IF_TYPE_IDE:
c7057b52 216 case IF_TYPE_SATA:
fe8c2806 217 case IF_TYPE_ATAPI:
bcce53d0
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218 sprintf((char *)info->name, "hd%c%d",
219 'a' + dev_desc->devnum,
220 part_num);
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221 break;
222 case IF_TYPE_SCSI:
bcce53d0
SG
223 sprintf((char *)info->name, "sd%c%d",
224 'a' + dev_desc->devnum,
225 part_num);
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226 break;
227 case IF_TYPE_USB:
bcce53d0
SG
228 sprintf((char *)info->name, "usbd%c%d",
229 'a' + dev_desc->devnum,
230 part_num);
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231 break;
232 case IF_TYPE_DOC:
bcce53d0
SG
233 sprintf((char *)info->name, "docd%c%d",
234 'a' + dev_desc->devnum,
235 part_num);
fe8c2806
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236 break;
237 default:
bcce53d0
SG
238 sprintf((char *)info->name, "xx%c%d",
239 'a' + dev_desc->devnum,
240 part_num);
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241 break;
242 }
243 /* sprintf(info->type, "%d, pt->sys_ind); */
192bc694 244 strcpy((char *)info->type, "U-Boot");
40e0e568 245 info->bootable = is_bootable(pt);
d27b5f93
SW
246#ifdef CONFIG_PARTITION_UUIDS
247 sprintf(info->uuid, "%08x-%02x", disksig, part_num);
248#endif
fe8c2806
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249 return 0;
250 }
251
252 /* Reverse engr the fdisk part# assignment rule! */
253 if ((ext_part_sector == 0) ||
254 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
255 part_num++;
256 }
257 }
258
259 /* Follows the extended partitions */
260 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
261 for (i = 0; i < 4; i++, pt++) {
262 if (is_extended (pt->sys_ind)) {
d29892ba
SM
263 lbaint_t lba_start
264 = le32_to_int (pt->start4) + relative;
fe8c2806 265
3e8bd469 266 return part_get_info_extended(dev_desc, lba_start,
fe8c2806 267 ext_part_sector == 0 ? lba_start : relative,
d27b5f93 268 part_num, which_part, info, disksig);
fe8c2806
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269 }
270 }
4a36be9b
DD
271
272 /* Check for DOS PBR if no partition is found */
273 dos_type = test_block_type(buffer);
274
275 if (dos_type == DOS_PBR) {
276 info->start = 0;
277 info->size = dev_desc->lba;
278 info->blksz = DOS_PART_DEFAULT_SECTOR;
279 info->bootable = 0;
192bc694 280 strcpy((char *)info->type, "U-Boot");
4a36be9b
DD
281#ifdef CONFIG_PARTITION_UUIDS
282 info->uuid[0] = 0;
283#endif
284 return 0;
285 }
286
fe8c2806
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287 return -1;
288}
289
4101f687 290void print_part_dos(struct blk_desc *dev_desc)
fe8c2806 291{
e2e9b378
SW
292 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
293 print_partition_extended(dev_desc, 0, 0, 1, 0);
fe8c2806
WD
294}
295
3e8bd469
SG
296int part_get_info_dos(struct blk_desc *dev_desc, int part,
297 disk_partition_t *info)
fe8c2806 298{
3e8bd469 299 return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
fe8c2806
WD
300}
301
96e5b03c
SG
302U_BOOT_PART_TYPE(dos) = {
303 .name = "DOS",
304 .part_type = PART_TYPE_DOS,
3e8bd469 305 .get_info = part_get_info_ptr(part_get_info_dos),
96e5b03c
SG
306 .print = part_print_ptr(print_part_dos),
307 .test = test_part_dos,
308};
fe8c2806 309
cde5c64d 310#endif