]> git.kernelconcepts.de Git - karo-tx-uboot.git/blob - disk/part_dos.c
* CVS add missing files
[karo-tx-uboot.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 ((CONFIG_COMMANDS & CFG_CMD_IDE)    || \
39      (CONFIG_COMMANDS & CFG_CMD_SCSI)   || \
40      (CONFIG_COMMANDS & CFG_CMD_USB)    || \
41      (CONFIG_SYSTEMACE)) && defined(CONFIG_DOS_PARTITION)
42
43 /* Convert char[4] in little endian format to the host format integer
44  */
45 static inline int le32_to_int(unsigned char *le32)
46 {
47     return ((le32[3] << 24) +
48             (le32[2] << 16) +
49             (le32[1] << 8) +
50              le32[0]
51            );
52 }
53
54 static inline int is_extended(int part_type)
55 {
56     return (part_type == 0x5 ||
57             part_type == 0xf ||
58             part_type == 0x85);
59 }
60
61 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
62 {
63         int lba_start = ext_part_sector + le32_to_int (p->start4);
64         int lba_size  = le32_to_int (p->size4);
65
66         printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
67                 part_num, lba_start, lba_size, p->sys_ind,
68                 (is_extended (p->sys_ind) ? " Extd" : ""));
69 }
70
71 static int test_block_type(unsigned char *buffer)
72 {
73         if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
74             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
75                 return (-1);
76         } /* no DOS Signature at all */
77         if(strncmp(&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0)
78                 return DOS_PBR; /* is PBR */
79         return DOS_MBR;     /* Is MBR */
80 }
81
82
83 int test_part_dos (block_dev_desc_t *dev_desc)
84 {
85         unsigned char buffer[DEFAULT_SECTOR_SIZE];
86
87         if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
88             (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
89             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
90                 return (-1);
91         }
92         return (0);
93 }
94
95 /*  Print a partition that is relative to its Extended partition table
96  */
97 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
98                                                            int part_num)
99 {
100         unsigned char buffer[DEFAULT_SECTOR_SIZE];
101         dos_partition_t *pt;
102         int i;
103
104         if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
105                 printf ("** Can't read partition table on %d:%d **\n",
106                         dev_desc->dev, ext_part_sector);
107                 return;
108         }
109         i=test_block_type(buffer);
110         if(i==-1) {
111                 printf ("bad MBR sector signature 0x%02x%02x\n",
112                         buffer[DOS_PART_MAGIC_OFFSET],
113                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
114                 return;
115         }
116         if(i==DOS_PBR) {
117                 printf ("    1\t\t         0\t%10ld\t%2x\n",
118                         dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
119                 return;
120         }
121         /* Print all primary/logical partitions */
122         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
123         for (i = 0; i < 4; i++, pt++) {
124                 /*
125                  * fdisk does not show the extended partitions that
126                  * are not in the MBR
127                  */
128
129                 if ((pt->sys_ind != 0) &&
130                     (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
131                         print_one_part (pt, ext_part_sector, part_num);
132                 }
133
134                 /* Reverse engr the fdisk part# assignment rule! */
135                 if ((ext_part_sector == 0) ||
136                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
137                         part_num++;
138                 }
139         }
140
141         /* Follows the extended partitions */
142         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
143         for (i = 0; i < 4; i++, pt++) {
144                 if (is_extended (pt->sys_ind)) {
145                         int lba_start = le32_to_int (pt->start4) + relative;
146
147                         print_partition_extended (dev_desc, lba_start,
148                                                   ext_part_sector == 0  ? lba_start
149                                                                         : relative,
150                                                   part_num);
151                 }
152         }
153
154         return;
155 }
156
157
158 /*  Print a partition that is relative to its Extended partition table
159  */
160 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
161                                  int relative, int part_num,
162                                  int which_part, disk_partition_t *info)
163 {
164         unsigned char buffer[DEFAULT_SECTOR_SIZE];
165         dos_partition_t *pt;
166         int i;
167
168         if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
169                 printf ("** Can't read partition table on %d:%d **\n",
170                         dev_desc->dev, ext_part_sector);
171                 return -1;
172         }
173         if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
174                 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
175                 printf ("bad MBR sector signature 0x%02x%02x\n",
176                         buffer[DOS_PART_MAGIC_OFFSET],
177                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
178                 return -1;
179         }
180
181         /* Print all primary/logical partitions */
182         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
183         for (i = 0; i < 4; i++, pt++) {
184                 /*
185                  * fdisk does not show the extended partitions that
186                  * are not in the MBR
187                  */
188                 if ((pt->sys_ind != 0) &&
189                     (part_num == which_part) &&
190                     (is_extended(pt->sys_ind) == 0)) {
191                         info->blksz = 512;
192                         info->start = ext_part_sector + le32_to_int (pt->start4);
193                         info->size  = le32_to_int (pt->size4);
194                         switch(dev_desc->if_type) {
195                                 case IF_TYPE_IDE:
196                                 case IF_TYPE_ATAPI:
197                                         sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
198                                         break;
199                                 case IF_TYPE_SCSI:
200                                         sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
201                                         break;
202                                 case IF_TYPE_USB:
203                                         sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
204                                         break;
205                                 case IF_TYPE_DOC:
206                                         sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
207                                         break;
208                                 default:
209                                         sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
210                                         break;
211                         }
212                         /* sprintf(info->type, "%d, pt->sys_ind); */
213                         sprintf (info->type, "U-Boot");
214                         return 0;
215                 }
216
217                 /* Reverse engr the fdisk part# assignment rule! */
218                 if ((ext_part_sector == 0) ||
219                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
220                         part_num++;
221                 }
222         }
223
224         /* Follows the extended partitions */
225         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
226         for (i = 0; i < 4; i++, pt++) {
227                 if (is_extended (pt->sys_ind)) {
228                         int lba_start = le32_to_int (pt->start4) + relative;
229
230                         return get_partition_info_extended (dev_desc, lba_start,
231                                  ext_part_sector == 0 ? lba_start : relative,
232                                  part_num, which_part, info);
233                 }
234         }
235         return -1;
236 }
237
238 void print_part_dos (block_dev_desc_t *dev_desc)
239 {
240         printf ("Partition     Start Sector     Num Sectors     Type\n");
241         print_partition_extended (dev_desc, 0, 0, 1);
242 }
243
244 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
245 {
246         return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
247 }
248
249
250 #endif  /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */