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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 *
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>
wdenkfe8c2802002-11-03 00:38:21 +000036#include "part_dos.h"
37
wdenk149dded2003-09-10 18:20:28 +000038#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || \
39 (CONFIG_COMMANDS & CFG_CMD_SCSI) || \
40 (CONFIG_COMMANDS & CFG_CMD_USB) ) && defined(CONFIG_DOS_PARTITION)
wdenkfe8c2802002-11-03 00:38:21 +000041
42/* Convert char[4] in little endian format to the host format integer
43 */
44static 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
53static inline int is_extended(int part_type)
54{
55 return (part_type == 0x5 ||
56 part_type == 0xf ||
57 part_type == 0x85);
58}
59
60static 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
wdenk7205e402003-09-10 22:30:53 +000070static 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
wdenkfe8c2802002-11-03 00:38:21 +000081
wdenkfe8c2802002-11-03 00:38:21 +000082int 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) ) {
wdenk8bde7f72003-06-27 21:31:46 +000089 return (-1);
wdenkfe8c2802002-11-03 00:38:21 +000090 }
91 return (0);
92}
93
94/* Print a partition that is relative to its Extended partition table
95 */
96static 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 }
wdenk7205e402003-09-10 22:30:53 +0000108 i=test_block_type(buffer);
109 if(i==-1) {
wdenkfe8c2802002-11-03 00:38:21 +0000110 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 }
wdenk7205e402003-09-10 22:30:53 +0000115 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 }
wdenkfe8c2802002-11-03 00:38:21 +0000120 /* Print all primary/logical partitions */
121 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
122 for (i = 0; i < 4; i++, pt++) {
123 /*
wdenk8bde7f72003-06-27 21:31:46 +0000124 * fdisk does not show the extended partitions that
wdenkfe8c2802002-11-03 00:38:21 +0000125 * 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 */
159static 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 /*
wdenk8bde7f72003-06-27 21:31:46 +0000184 * fdisk does not show the extended partitions that
185 * are not in the MBR
wdenkfe8c2802002-11-03 00:38:21 +0000186 */
wdenk7f70e852003-05-20 14:25:27 +0000187 if ((pt->sys_ind != 0) &&
188 (part_num == which_part) &&
189 (is_extended(pt->sys_ind) == 0)) {
wdenkfe8c2802002-11-03 00:38:21 +0000190 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
237void 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
243int 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
wdenkfe8c2802002-11-03 00:38:21 +0000249#endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */