tegra: enable CONFIG_CMD_PART
[oweals/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, int part_num)
69 {
70         int lba_start = ext_part_sector + le32_to_int (p->start4);
71         int lba_size  = le32_to_int (p->size4);
72
73         printf("%5d\t\t%10d\t%10d\t%2x%s%s\n",
74                 part_num, lba_start, lba_size, p->sys_ind,
75                 (is_extended(p->sys_ind) ? " Extd" : ""),
76                 (is_bootable(p) ? " Boot" : ""));
77 }
78
79 static int test_block_type(unsigned char *buffer)
80 {
81         if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
82             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
83                 return (-1);
84         } /* no DOS Signature at all */
85         if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 ||
86             strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) {
87                 return DOS_PBR; /* is PBR */
88         }
89         return DOS_MBR;     /* Is MBR */
90 }
91
92
93 int test_part_dos (block_dev_desc_t *dev_desc)
94 {
95         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
96
97         if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
98                 return -1;
99
100         if (test_block_type(buffer) != DOS_MBR)
101                 return -1;
102
103         return 0;
104 }
105
106 /*  Print a partition that is relative to its Extended partition table
107  */
108 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
109                                                            int part_num)
110 {
111         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
112         dos_partition_t *pt;
113         int i;
114
115         if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
116                 printf ("** Can't read partition table on %d:%d **\n",
117                         dev_desc->dev, ext_part_sector);
118                 return;
119         }
120         i=test_block_type(buffer);
121         if (i != DOS_MBR) {
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         }
127
128         /* Print all primary/logical partitions */
129         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
130         for (i = 0; i < 4; i++, pt++) {
131                 /*
132                  * fdisk does not show the extended partitions that
133                  * are not in the MBR
134                  */
135
136                 if ((pt->sys_ind != 0) &&
137                     (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
138                         print_one_part (pt, ext_part_sector, part_num);
139                 }
140
141                 /* Reverse engr the fdisk part# assignment rule! */
142                 if ((ext_part_sector == 0) ||
143                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
144                         part_num++;
145                 }
146         }
147
148         /* Follows the extended partitions */
149         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
150         for (i = 0; i < 4; i++, pt++) {
151                 if (is_extended (pt->sys_ind)) {
152                         int lba_start = le32_to_int (pt->start4) + relative;
153
154                         print_partition_extended (dev_desc, lba_start,
155                                                   ext_part_sector == 0  ? lba_start
156                                                                         : relative,
157                                                   part_num);
158                 }
159         }
160
161         return;
162 }
163
164
165 /*  Print a partition that is relative to its Extended partition table
166  */
167 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
168                                  int relative, int part_num,
169                                  int which_part, disk_partition_t *info,
170                                  unsigned int disksig)
171 {
172         ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
173         dos_partition_t *pt;
174         int i;
175
176         if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
177                 printf ("** Can't read partition table on %d:%d **\n",
178                         dev_desc->dev, ext_part_sector);
179                 return -1;
180         }
181         if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
182                 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
183                 printf ("bad MBR sector signature 0x%02x%02x\n",
184                         buffer[DOS_PART_MAGIC_OFFSET],
185                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
186                 return -1;
187         }
188
189 #ifdef CONFIG_PARTITION_UUIDS
190         if (!ext_part_sector)
191                 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
192 #endif
193
194         /* Print all primary/logical partitions */
195         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
196         for (i = 0; i < 4; i++, pt++) {
197                 /*
198                  * fdisk does not show the extended partitions that
199                  * are not in the MBR
200                  */
201                 if (((pt->boot_ind & ~0x80) == 0) &&
202                     (pt->sys_ind != 0) &&
203                     (part_num == which_part) &&
204                     (is_extended(pt->sys_ind) == 0)) {
205                         info->blksz = 512;
206                         info->start = ext_part_sector + le32_to_int (pt->start4);
207                         info->size  = le32_to_int (pt->size4);
208                         switch(dev_desc->if_type) {
209                                 case IF_TYPE_IDE:
210                                 case IF_TYPE_SATA:
211                                 case IF_TYPE_ATAPI:
212                                         sprintf ((char *)info->name, "hd%c%d",
213                                                 'a' + dev_desc->dev, part_num);
214                                         break;
215                                 case IF_TYPE_SCSI:
216                                         sprintf ((char *)info->name, "sd%c%d",
217                                                 'a' + dev_desc->dev, part_num);
218                                         break;
219                                 case IF_TYPE_USB:
220                                         sprintf ((char *)info->name, "usbd%c%d",
221                                                 'a' + dev_desc->dev, part_num);
222                                         break;
223                                 case IF_TYPE_DOC:
224                                         sprintf ((char *)info->name, "docd%c%d",
225                                                 'a' + dev_desc->dev, part_num);
226                                         break;
227                                 default:
228                                         sprintf ((char *)info->name, "xx%c%d",
229                                                 'a' + dev_desc->dev, part_num);
230                                         break;
231                         }
232                         /* sprintf(info->type, "%d, pt->sys_ind); */
233                         sprintf ((char *)info->type, "U-Boot");
234                         info->bootable = is_bootable(pt);
235 #ifdef CONFIG_PARTITION_UUIDS
236                         sprintf(info->uuid, "%08x-%02x", disksig, part_num);
237 #endif
238                         return 0;
239                 }
240
241                 /* Reverse engr the fdisk part# assignment rule! */
242                 if ((ext_part_sector == 0) ||
243                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
244                         part_num++;
245                 }
246         }
247
248         /* Follows the extended partitions */
249         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
250         for (i = 0; i < 4; i++, pt++) {
251                 if (is_extended (pt->sys_ind)) {
252                         int lba_start = le32_to_int (pt->start4) + relative;
253
254                         return get_partition_info_extended (dev_desc, lba_start,
255                                  ext_part_sector == 0 ? lba_start : relative,
256                                  part_num, which_part, info, disksig);
257                 }
258         }
259         return -1;
260 }
261
262 void print_part_dos (block_dev_desc_t *dev_desc)
263 {
264         printf ("Partition     Start Sector     Num Sectors     Type\n");
265         print_partition_extended (dev_desc, 0, 0, 1);
266 }
267
268 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
269 {
270         return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
271 }
272
273
274 #endif