disk: part_dos: print partition UUID in partition list
[platform/kernel/u-boot.git] / disk / part_dos.c
1 /*
2  * (C) Copyright 2001
3  * Raymond Lo, lo@routefree.com
4  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
5  *
6  * See file CREDITS for list of people who contributed to this
7  * project.
8  *
9  * This program is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU General Public License as
11  * published by the Free Software Foundation; either version 2 of
12  * the License, or (at your option) any later version.
13  *
14  * This program is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17  * GNU General Public License for more details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this program; if not, write to the Free Software
21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
22  * MA 02111-1307 USA
23  */
24
25 /*
26  * Support for harddisk partitions.
27  *
28  * To be compatible with LinuxPPC and Apple we use the standard Apple
29  * SCSI disk partitioning scheme. For more information see:
30  * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
31  */
32
33 #include <common.h>
34 #include <command.h>
35 #include <ide.h>
36 #include "part_dos.h"
37
38 #if defined(CONFIG_CMD_IDE) || \
39     defined(CONFIG_CMD_SATA) || \
40     defined(CONFIG_CMD_SCSI) || \
41     defined(CONFIG_CMD_USB) || \
42     defined(CONFIG_MMC) || \
43     defined(CONFIG_SYSTEMACE)
44
45 /* Convert char[4] in little endian format to the host format integer
46  */
47 static inline int le32_to_int(unsigned char *le32)
48 {
49     return ((le32[3] << 24) +
50             (le32[2] << 16) +
51             (le32[1] << 8) +
52              le32[0]
53            );
54 }
55
56 static inline int is_extended(int part_type)
57 {
58     return (part_type == 0x5 ||
59             part_type == 0xf ||
60             part_type == 0x85);
61 }
62
63 static inline int is_bootable(dos_partition_t *p)
64 {
65         return p->boot_ind == 0x80;
66 }
67
68 static void print_one_part(dos_partition_t *p, int ext_part_sector,
69                            int part_num, unsigned int disksig)
70 {
71         int lba_start = ext_part_sector + le32_to_int (p->start4);
72         int lba_size  = le32_to_int (p->size4);
73
74         printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n",
75                 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
76                 (is_extended(p->sys_ind) ? " Extd" : ""),
77                 (is_bootable(p) ? " Boot" : ""));
78 }
79
80 static int test_block_type(unsigned char *buffer)
81 {
82         if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
83             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
84                 return (-1);
85         } /* no DOS Signature at all */
86         if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 ||
87             strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) {
88                 return DOS_PBR; /* is PBR */
89         }
90         return DOS_MBR;     /* Is MBR */
91 }
92
93
94 int test_part_dos (block_dev_desc_t *dev_desc)
95 {
96         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
97
98         if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
99                 return -1;
100
101         if (test_block_type(buffer) != DOS_MBR)
102                 return -1;
103
104         return 0;
105 }
106
107 /*  Print a partition that is relative to its Extended partition table
108  */
109 static void print_partition_extended(block_dev_desc_t *dev_desc,
110                                      int ext_part_sector, int relative,
111                                      int part_num, unsigned int disksig)
112 {
113         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
114         dos_partition_t *pt;
115         int i;
116
117         if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
118                 printf ("** Can't read partition table on %d:%d **\n",
119                         dev_desc->dev, ext_part_sector);
120                 return;
121         }
122         i=test_block_type(buffer);
123         if (i != DOS_MBR) {
124                 printf ("bad MBR sector signature 0x%02x%02x\n",
125                         buffer[DOS_PART_MAGIC_OFFSET],
126                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
127                 return;
128         }
129
130         if (!ext_part_sector)
131                 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
132
133         /* Print all primary/logical partitions */
134         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
135         for (i = 0; i < 4; i++, pt++) {
136                 /*
137                  * fdisk does not show the extended partitions that
138                  * are not in the MBR
139                  */
140
141                 if ((pt->sys_ind != 0) &&
142                     (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
143                         print_one_part(pt, ext_part_sector, part_num, disksig);
144                 }
145
146                 /* Reverse engr the fdisk part# assignment rule! */
147                 if ((ext_part_sector == 0) ||
148                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
149                         part_num++;
150                 }
151         }
152
153         /* Follows the extended partitions */
154         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
155         for (i = 0; i < 4; i++, pt++) {
156                 if (is_extended (pt->sys_ind)) {
157                         int lba_start = le32_to_int (pt->start4) + relative;
158
159                         print_partition_extended(dev_desc, lba_start,
160                                 ext_part_sector == 0  ? lba_start : relative,
161                                 part_num, disksig);
162                 }
163         }
164
165         return;
166 }
167
168
169 /*  Print a partition that is relative to its Extended partition table
170  */
171 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
172                                  int relative, int part_num,
173                                  int which_part, disk_partition_t *info,
174                                  unsigned int disksig)
175 {
176         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
177         dos_partition_t *pt;
178         int i;
179
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:%d **\n",
182                         dev_desc->dev, ext_part_sector);
183                 return -1;
184         }
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]);
190                 return -1;
191         }
192
193 #ifdef CONFIG_PARTITION_UUIDS
194         if (!ext_part_sector)
195                 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
196 #endif
197
198         /* Print all primary/logical partitions */
199         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
200         for (i = 0; i < 4; i++, pt++) {
201                 /*
202                  * fdisk does not show the extended partitions that
203                  * are not in the MBR
204                  */
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 = 512;
210                         info->start = ext_part_sector + le32_to_int (pt->start4);
211                         info->size  = le32_to_int (pt->size4);
212                         switch(dev_desc->if_type) {
213                                 case IF_TYPE_IDE:
214                                 case IF_TYPE_SATA:
215                                 case IF_TYPE_ATAPI:
216                                         sprintf ((char *)info->name, "hd%c%d",
217                                                 'a' + dev_desc->dev, part_num);
218                                         break;
219                                 case IF_TYPE_SCSI:
220                                         sprintf ((char *)info->name, "sd%c%d",
221                                                 'a' + dev_desc->dev, part_num);
222                                         break;
223                                 case IF_TYPE_USB:
224                                         sprintf ((char *)info->name, "usbd%c%d",
225                                                 'a' + dev_desc->dev, part_num);
226                                         break;
227                                 case IF_TYPE_DOC:
228                                         sprintf ((char *)info->name, "docd%c%d",
229                                                 'a' + dev_desc->dev, part_num);
230                                         break;
231                                 default:
232                                         sprintf ((char *)info->name, "xx%c%d",
233                                                 'a' + dev_desc->dev, part_num);
234                                         break;
235                         }
236                         /* sprintf(info->type, "%d, pt->sys_ind); */
237                         sprintf ((char *)info->type, "U-Boot");
238                         info->bootable = is_bootable(pt);
239 #ifdef CONFIG_PARTITION_UUIDS
240                         sprintf(info->uuid, "%08x-%02x", disksig, part_num);
241 #endif
242                         return 0;
243                 }
244
245                 /* Reverse engr the fdisk part# assignment rule! */
246                 if ((ext_part_sector == 0) ||
247                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
248                         part_num++;
249                 }
250         }
251
252         /* Follows the extended partitions */
253         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
254         for (i = 0; i < 4; i++, pt++) {
255                 if (is_extended (pt->sys_ind)) {
256                         int lba_start = le32_to_int (pt->start4) + relative;
257
258                         return get_partition_info_extended (dev_desc, lba_start,
259                                  ext_part_sector == 0 ? lba_start : relative,
260                                  part_num, which_part, info, disksig);
261                 }
262         }
263         return -1;
264 }
265
266 void print_part_dos (block_dev_desc_t *dev_desc)
267 {
268         printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
269         print_partition_extended(dev_desc, 0, 0, 1, 0);
270 }
271
272 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
273 {
274         return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
275 }
276
277
278 #endif