]> git.karo-electronics.de Git - karo-tx-uboot.git/blob - disk/part_dos.c
* Patches by Denis Peter, 9 Sep 2003:
[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)    ) && defined(CONFIG_DOS_PARTITION)
41
42 /* Convert char[4] in little endian format to the host format integer
43  */
44 static inline int le32_to_int(unsigned char *le32)
45 {
46     return ((le32[3] << 24) +
47             (le32[2] << 16) +
48             (le32[1] << 8) +
49              le32[0]
50            );
51 }
52
53 static inline int is_extended(int part_type)
54 {
55     return (part_type == 0x5 ||
56             part_type == 0xf ||
57             part_type == 0x85);
58 }
59
60 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
61 {
62         int lba_start = ext_part_sector + le32_to_int (p->start4);
63         int lba_size  = le32_to_int (p->size4);
64
65         printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
66                 part_num, lba_start, lba_size, p->sys_ind,
67                 (is_extended (p->sys_ind) ? " Extd" : ""));
68 }
69
70 static int test_block_type(unsigned char *buffer)
71 {
72         if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
73             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
74                 return (-1);
75         } /* no DOS Signature at all */
76         if(strncmp(&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0)
77                 return DOS_PBR; /* is PBR */
78         return DOS_MBR;     /* Is MBR */
79 }
80
81
82 int test_part_dos (block_dev_desc_t *dev_desc)
83 {
84         unsigned char buffer[DEFAULT_SECTOR_SIZE];
85
86         if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
87             (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
88             (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
89                 return (-1);
90         }
91         return (0);
92 }
93
94 /*  Print a partition that is relative to its Extended partition table
95  */
96 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
97                                                            int part_num)
98 {
99         unsigned char buffer[DEFAULT_SECTOR_SIZE];
100         dos_partition_t *pt;
101         int i;
102
103         if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
104                 printf ("** Can't read partition table on %d:%d **\n",
105                         dev_desc->dev, ext_part_sector);
106                 return;
107         }
108         i=test_block_type(buffer);
109         if(i==-1) {
110                 printf ("bad MBR sector signature 0x%02x%02x\n",
111                         buffer[DOS_PART_MAGIC_OFFSET],
112                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
113                 return;
114         }
115         if(i==DOS_PBR) {
116                 printf ("    1\t\t         0\t%10ld\t%2x\n",
117                         dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
118                 return;
119         }
120         /* Print all primary/logical partitions */
121         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
122         for (i = 0; i < 4; i++, pt++) {
123                 /*
124                  * fdisk does not show the extended partitions that
125                  * are not in the MBR
126                  */
127
128                 if ((pt->sys_ind != 0) &&
129                     (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
130                         print_one_part (pt, ext_part_sector, part_num);
131                 }
132
133                 /* Reverse engr the fdisk part# assignment rule! */
134                 if ((ext_part_sector == 0) ||
135                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
136                         part_num++;
137                 }
138         }
139
140         /* Follows the extended partitions */
141         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
142         for (i = 0; i < 4; i++, pt++) {
143                 if (is_extended (pt->sys_ind)) {
144                         int lba_start = le32_to_int (pt->start4) + relative;
145
146                         print_partition_extended (dev_desc, lba_start,
147                                                   ext_part_sector == 0  ? lba_start
148                                                                         : relative,
149                                                   part_num);
150                 }
151         }
152
153         return;
154 }
155
156
157 /*  Print a partition that is relative to its Extended partition table
158  */
159 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
160                                  int relative, int part_num,
161                                  int which_part, disk_partition_t *info)
162 {
163         unsigned char buffer[DEFAULT_SECTOR_SIZE];
164         dos_partition_t *pt;
165         int i;
166
167         if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
168                 printf ("** Can't read partition table on %d:%d **\n",
169                         dev_desc->dev, ext_part_sector);
170                 return -1;
171         }
172         if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
173                 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
174                 printf ("bad MBR sector signature 0x%02x%02x\n",
175                         buffer[DOS_PART_MAGIC_OFFSET],
176                         buffer[DOS_PART_MAGIC_OFFSET + 1]);
177                 return -1;
178         }
179
180         /* Print all primary/logical partitions */
181         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
182         for (i = 0; i < 4; i++, pt++) {
183                 /*
184                  * fdisk does not show the extended partitions that
185                  * are not in the MBR
186                  */
187                 if ((pt->sys_ind != 0) &&
188                     (part_num == which_part) &&
189                     (is_extended(pt->sys_ind) == 0)) {
190                         info->blksz = 512;
191                         info->start = ext_part_sector + le32_to_int (pt->start4);
192                         info->size  = le32_to_int (pt->size4);
193                         switch(dev_desc->if_type) {
194                                 case IF_TYPE_IDE:
195                                 case IF_TYPE_ATAPI:
196                                         sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
197                                         break;
198                                 case IF_TYPE_SCSI:
199                                         sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
200                                         break;
201                                 case IF_TYPE_USB:
202                                         sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
203                                         break;
204                                 case IF_TYPE_DOC:
205                                         sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
206                                         break;
207                                 default:
208                                         sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
209                                         break;
210                         }
211                         /* sprintf(info->type, "%d, pt->sys_ind); */
212                         sprintf (info->type, "U-Boot");
213                         return 0;
214                 }
215
216                 /* Reverse engr the fdisk part# assignment rule! */
217                 if ((ext_part_sector == 0) ||
218                     (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
219                         part_num++;
220                 }
221         }
222
223         /* Follows the extended partitions */
224         pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
225         for (i = 0; i < 4; i++, pt++) {
226                 if (is_extended (pt->sys_ind)) {
227                         int lba_start = le32_to_int (pt->start4) + relative;
228
229                         return get_partition_info_extended (dev_desc, lba_start,
230                                  ext_part_sector == 0 ? lba_start : relative,
231                                  part_num, which_part, info);
232                 }
233         }
234         return -1;
235 }
236
237 void print_part_dos (block_dev_desc_t *dev_desc)
238 {
239         printf ("Partition     Start Sector     Num Sectors     Type\n");
240         print_partition_extended (dev_desc, 0, 0, 1);
241 }
242
243 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
244 {
245         return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
246 }
247
248
249 #endif  /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */