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wdenkfe8c2802002-11-03 00:38:21 +00001/*
2 * (C) Copyright 2001
3 * Raymond Lo, lo@routefree.com
4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02006 * SPDX-License-Identifier: GPL-2.0+
wdenkfe8c2802002-11-03 00:38:21 +00007 */
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>
Simon Glasscf92e052015-09-02 17:24:58 -060020#include <memalign.h>
wdenkfe8c2802002-11-03 00:38:21 +000021#include "part_dos.h"
22
Stephen Warren2c1af9d2013-02-28 15:03:46 +000023#ifdef HAVE_BLOCK_DEVICE
wdenkfe8c2802002-11-03 00:38:21 +000024
Darwin Dingel4a36be92014-06-06 15:48:26 +120025#define DOS_PART_DEFAULT_SECTOR 512
26
wdenkfe8c2802002-11-03 00:38:21 +000027/* Convert char[4] in little endian format to the host format integer
28 */
Stefan Monnierd29892b2015-08-25 15:24:13 -040029static inline unsigned int le32_to_int(unsigned char *le32)
wdenkfe8c2802002-11-03 00:38:21 +000030{
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
Rob Herring40e0e562012-08-23 11:31:43 +000045static inline int is_bootable(dos_partition_t *p)
46{
Andre Przywaraeefa0a62017-07-06 10:14:03 +010047 return (p->sys_ind == 0xef) || (p->boot_ind == 0x80);
Rob Herring40e0e562012-08-23 11:31:43 +000048}
49
Stefan Monnierd29892b2015-08-25 15:24:13 -040050static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
Stephen Warrene2e9b372012-10-08 08:14:40 +000051 int part_num, unsigned int disksig)
wdenkfe8c2802002-11-03 00:38:21 +000052{
Stefan Monnierd29892b2015-08-25 15:24:13 -040053 lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
54 lbaint_t lba_size = le32_to_int (p->size4);
wdenkfe8c2802002-11-03 00:38:21 +000055
Stefan Monnierd29892b2015-08-25 15:24:13 -040056 printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
57 "u\t%08x-%02x\t%02x%s%s\n",
Stephen Warrene2e9b372012-10-08 08:14:40 +000058 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
Rob Herring40e0e562012-08-23 11:31:43 +000059 (is_extended(p->sys_ind) ? " Extd" : ""),
60 (is_bootable(p) ? " Boot" : ""));
wdenkfe8c2802002-11-03 00:38:21 +000061}
62
wdenk7205e402003-09-10 22:30:53 +000063static int test_block_type(unsigned char *buffer)
64{
Egbert Eich9d956e02013-04-09 05:46:14 +000065 int slot;
66 struct dos_partition *p;
67
wdenk7205e402003-09-10 22:30:53 +000068 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 */
Egbert Eich9d956e02013-04-09 05:46:14 +000072 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 }
Wolfgang Denk66c2d732010-07-19 11:36:57 +020085 }
wdenk7205e402003-09-10 22:30:53 +000086 return DOS_MBR; /* Is MBR */
87}
88
wdenkfe8c2802002-11-03 00:38:21 +000089
Simon Glass084bf4c2016-02-29 15:26:04 -070090static int part_test_dos(struct blk_desc *dev_desc)
wdenkfe8c2802002-11-03 00:38:21 +000091{
Fabio Estevam3ea05202017-10-04 13:29:57 -030092#ifndef CONFIG_SPL_BUILD
Peter Jonesff98cb92017-09-13 18:05:25 -040093 ALLOC_CACHE_ALIGN_BUFFER(legacy_mbr, mbr, dev_desc->blksz);
wdenkfe8c2802002-11-03 00:38:21 +000094
Peter Jonesff98cb92017-09-13 18:05:25 -040095 if (blk_dread(dev_desc, 0, 1, (ulong *)mbr) != 1)
Stephen Warrend1efb642012-10-05 13:17:40 +000096 return -1;
97
Peter Jonesff98cb92017-09-13 18:05:25 -040098 if (test_block_type((unsigned char *)mbr) != DOS_MBR)
Stephen Warrend1efb642012-10-05 13:17:40 +000099 return -1;
100
Peter Jonesff98cb92017-09-13 18:05:25 -0400101 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;
105 }
Fabio Estevam3ea05202017-10-04 13:29:57 -0300106#else
107 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
108
109 if (blk_dread(dev_desc, 0, 1, (ulong *)buffer) != 1)
110 return -1;
111
112 if (test_block_type(buffer) != DOS_MBR)
113 return -1;
114#endif
Peter Jonesff98cb92017-09-13 18:05:25 -0400115
Stephen Warrend1efb642012-10-05 13:17:40 +0000116 return 0;
wdenkfe8c2802002-11-03 00:38:21 +0000117}
118
119/* Print a partition that is relative to its Extended partition table
120 */
Simon Glass4101f682016-02-29 15:25:34 -0700121static void print_partition_extended(struct blk_desc *dev_desc,
Stefan Monnierd29892b2015-08-25 15:24:13 -0400122 lbaint_t ext_part_sector,
123 lbaint_t relative,
Stephen Warrene2e9b372012-10-08 08:14:40 +0000124 int part_num, unsigned int disksig)
wdenkfe8c2802002-11-03 00:38:21 +0000125{
Eric Nelsondec049d2012-03-03 12:02:20 +0000126 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
wdenkfe8c2802002-11-03 00:38:21 +0000127 dos_partition_t *pt;
128 int i;
129
Simon Glass2a981dc2016-02-29 15:25:52 -0700130 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
Stefan Monnierd29892b2015-08-25 15:24:13 -0400131 printf ("** Can't read partition table on %d:" LBAFU " **\n",
Simon Glassbcce53d2016-02-29 15:25:51 -0700132 dev_desc->devnum, ext_part_sector);
wdenkfe8c2802002-11-03 00:38:21 +0000133 return;
134 }
wdenk7205e402003-09-10 22:30:53 +0000135 i=test_block_type(buffer);
Stephen Warrend1efb642012-10-05 13:17:40 +0000136 if (i != DOS_MBR) {
wdenkfe8c2802002-11-03 00:38:21 +0000137 printf ("bad MBR sector signature 0x%02x%02x\n",
138 buffer[DOS_PART_MAGIC_OFFSET],
139 buffer[DOS_PART_MAGIC_OFFSET + 1]);
140 return;
141 }
Stephen Warrend1efb642012-10-05 13:17:40 +0000142
Stephen Warrene2e9b372012-10-08 08:14:40 +0000143 if (!ext_part_sector)
144 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
145
wdenkfe8c2802002-11-03 00:38:21 +0000146 /* Print all primary/logical partitions */
147 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
148 for (i = 0; i < 4; i++, pt++) {
149 /*
wdenk8bde7f72003-06-27 21:31:46 +0000150 * fdisk does not show the extended partitions that
wdenkfe8c2802002-11-03 00:38:21 +0000151 * are not in the MBR
152 */
153
154 if ((pt->sys_ind != 0) &&
155 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
Stephen Warrene2e9b372012-10-08 08:14:40 +0000156 print_one_part(pt, ext_part_sector, part_num, disksig);
wdenkfe8c2802002-11-03 00:38:21 +0000157 }
158
159 /* Reverse engr the fdisk part# assignment rule! */
160 if ((ext_part_sector == 0) ||
161 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
162 part_num++;
163 }
164 }
165
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)) {
Stefan Monnierd29892b2015-08-25 15:24:13 -0400170 lbaint_t lba_start
171 = le32_to_int (pt->start4) + relative;
wdenkfe8c2802002-11-03 00:38:21 +0000172
Stephen Warren304b5712012-10-08 08:14:38 +0000173 print_partition_extended(dev_desc, lba_start,
174 ext_part_sector == 0 ? lba_start : relative,
Stephen Warrene2e9b372012-10-08 08:14:40 +0000175 part_num, disksig);
wdenkfe8c2802002-11-03 00:38:21 +0000176 }
177 }
178
179 return;
180}
181
182
183/* Print a partition that is relative to its Extended partition table
184 */
Simon Glass3e8bd462016-02-29 15:25:48 -0700185static 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)
wdenkfe8c2802002-11-03 00:38:21 +0000189{
Eric Nelsondec049d2012-03-03 12:02:20 +0000190 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
wdenkfe8c2802002-11-03 00:38:21 +0000191 dos_partition_t *pt;
192 int i;
Darwin Dingel4a36be92014-06-06 15:48:26 +1200193 int dos_type;
wdenkfe8c2802002-11-03 00:38:21 +0000194
Simon Glass2a981dc2016-02-29 15:25:52 -0700195 if (blk_dread(dev_desc, ext_part_sector, 1, (ulong *)buffer) != 1) {
Stefan Monnierd29892b2015-08-25 15:24:13 -0400196 printf ("** Can't read partition table on %d:" LBAFU " **\n",
Simon Glassbcce53d2016-02-29 15:25:51 -0700197 dev_desc->devnum, ext_part_sector);
wdenkfe8c2802002-11-03 00:38:21 +0000198 return -1;
199 }
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]);
205 return -1;
206 }
207
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100208#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Stephen Warrend27b5f92012-09-21 09:51:00 +0000209 if (!ext_part_sector)
210 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
211#endif
212
wdenkfe8c2802002-11-03 00:38:21 +0000213 /* Print all primary/logical partitions */
214 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
215 for (i = 0; i < 4; i++, pt++) {
216 /*
wdenk8bde7f72003-06-27 21:31:46 +0000217 * fdisk does not show the extended partitions that
218 * are not in the MBR
wdenkfe8c2802002-11-03 00:38:21 +0000219 */
Daniel Mack78f4ca72009-09-28 11:40:38 +0200220 if (((pt->boot_ind & ~0x80) == 0) &&
221 (pt->sys_ind != 0) &&
wdenk7f70e852003-05-20 14:25:27 +0000222 (part_num == which_part) &&
Shawn Guo8f7102c2017-11-02 16:46:34 +0800223 (ext_part_sector == 0 || is_extended(pt->sys_ind) == 0)) {
Darwin Dingel4a36be92014-06-06 15:48:26 +1200224 info->blksz = DOS_PART_DEFAULT_SECTOR;
Steve Raee04350d2014-05-26 11:52:23 -0700225 info->start = (lbaint_t)(ext_part_sector +
226 le32_to_int(pt->start4));
227 info->size = (lbaint_t)le32_to_int(pt->size4);
Petr Kulhavyda2ee242016-09-09 10:27:17 +0200228 part_set_generic_name(dev_desc, part_num,
229 (char *)info->name);
wdenkfe8c2802002-11-03 00:38:21 +0000230 /* sprintf(info->type, "%d, pt->sys_ind); */
Ben Whitten192bc692015-12-30 13:05:58 +0000231 strcpy((char *)info->type, "U-Boot");
Rob Herring40e0e562012-08-23 11:31:43 +0000232 info->bootable = is_bootable(pt);
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100233#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Stephen Warrend27b5f92012-09-21 09:51:00 +0000234 sprintf(info->uuid, "%08x-%02x", disksig, part_num);
235#endif
Dalon Westergreenf0fb4fa2017-02-10 17:15:34 -0800236 info->sys_ind = pt->sys_ind;
wdenkfe8c2802002-11-03 00:38:21 +0000237 return 0;
238 }
239
240 /* Reverse engr the fdisk part# assignment rule! */
241 if ((ext_part_sector == 0) ||
242 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
243 part_num++;
244 }
245 }
246
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)) {
Stefan Monnierd29892b2015-08-25 15:24:13 -0400251 lbaint_t lba_start
252 = le32_to_int (pt->start4) + relative;
wdenkfe8c2802002-11-03 00:38:21 +0000253
Simon Glass3e8bd462016-02-29 15:25:48 -0700254 return part_get_info_extended(dev_desc, lba_start,
wdenkfe8c2802002-11-03 00:38:21 +0000255 ext_part_sector == 0 ? lba_start : relative,
Stephen Warrend27b5f92012-09-21 09:51:00 +0000256 part_num, which_part, info, disksig);
wdenkfe8c2802002-11-03 00:38:21 +0000257 }
258 }
Darwin Dingel4a36be92014-06-06 15:48:26 +1200259
260 /* Check for DOS PBR if no partition is found */
261 dos_type = test_block_type(buffer);
262
263 if (dos_type == DOS_PBR) {
264 info->start = 0;
265 info->size = dev_desc->lba;
266 info->blksz = DOS_PART_DEFAULT_SECTOR;
267 info->bootable = 0;
Ben Whitten192bc692015-12-30 13:05:58 +0000268 strcpy((char *)info->type, "U-Boot");
Patrick Delaunayb331cd62017-01-27 11:00:42 +0100269#if CONFIG_IS_ENABLED(PARTITION_UUIDS)
Darwin Dingel4a36be92014-06-06 15:48:26 +1200270 info->uuid[0] = 0;
271#endif
272 return 0;
273 }
274
wdenkfe8c2802002-11-03 00:38:21 +0000275 return -1;
276}
277
Simon Glass084bf4c2016-02-29 15:26:04 -0700278void part_print_dos(struct blk_desc *dev_desc)
wdenkfe8c2802002-11-03 00:38:21 +0000279{
Stephen Warrene2e9b372012-10-08 08:14:40 +0000280 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
281 print_partition_extended(dev_desc, 0, 0, 1, 0);
wdenkfe8c2802002-11-03 00:38:21 +0000282}
283
Simon Glass3e8bd462016-02-29 15:25:48 -0700284int part_get_info_dos(struct blk_desc *dev_desc, int part,
285 disk_partition_t *info)
wdenkfe8c2802002-11-03 00:38:21 +0000286{
Simon Glass3e8bd462016-02-29 15:25:48 -0700287 return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0);
wdenkfe8c2802002-11-03 00:38:21 +0000288}
289
Petr Kulhavyb6dd69a2016-09-09 10:27:16 +0200290int is_valid_dos_buf(void *buf)
291{
292 return test_block_type(buf) == DOS_MBR ? 0 : -1;
293}
294
295int write_mbr_partition(struct blk_desc *dev_desc, void *buf)
296{
297 if (is_valid_dos_buf(buf))
298 return -1;
299
300 /* write MBR */
301 if (blk_dwrite(dev_desc, 0, 1, buf) != 1) {
302 printf("%s: failed writing '%s' (1 blks at 0x0)\n",
303 __func__, "MBR");
304 return 1;
305 }
306
307 return 0;
308}
309
Simon Glass96e5b032016-02-29 15:25:47 -0700310U_BOOT_PART_TYPE(dos) = {
311 .name = "DOS",
312 .part_type = PART_TYPE_DOS,
Petr Kulhavy87b85302016-09-09 10:27:15 +0200313 .max_entries = DOS_ENTRY_NUMBERS,
Simon Glass3e8bd462016-02-29 15:25:48 -0700314 .get_info = part_get_info_ptr(part_get_info_dos),
Simon Glass084bf4c2016-02-29 15:26:04 -0700315 .print = part_print_ptr(part_print_dos),
316 .test = part_test_dos,
Simon Glass96e5b032016-02-29 15:25:47 -0700317};
wdenkfe8c2802002-11-03 00:38:21 +0000318
Jon Loeligercde5c642007-07-09 17:22:37 -0500319#endif