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_MG_DISK) || \
40     defined(CONFIG_CMD_SATA) || \
41     defined(CONFIG_CMD_SCSI) || \
42     defined(CONFIG_CMD_USB) || \
43     defined(CONFIG_MMC) || \
44     defined(CONFIG_SYSTEMACE)
45 
46 /* Convert char[4] in little endian format to the host format integer
47  */
le32_to_int(unsigned char * le32)48 static inline int le32_to_int(unsigned char *le32)
49 {
50     return ((le32[3] << 24) +
51 	    (le32[2] << 16) +
52 	    (le32[1] << 8) +
53 	     le32[0]
54 	   );
55 }
56 
is_extended(int part_type)57 static inline int is_extended(int part_type)
58 {
59     return (part_type == 0x5 ||
60 	    part_type == 0xf ||
61 	    part_type == 0x85);
62 }
63 
print_one_part(dos_partition_t * p,int ext_part_sector,int part_num)64 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
65 {
66 	int lba_start = ext_part_sector + le32_to_int (p->start4);
67 	int lba_size  = le32_to_int (p->size4);
68 
69 	printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
70 		part_num, lba_start, lba_size, p->sys_ind,
71 		(is_extended (p->sys_ind) ? " Extd" : ""));
72 }
73 
test_block_type(unsigned char * buffer)74 static int test_block_type(unsigned char *buffer)
75 {
76 	if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
77 	    (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
78 		return (-1);
79 	} /* no DOS Signature at all */
80 	if(strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0)
81 		return DOS_PBR; /* is PBR */
82 	return DOS_MBR;	    /* Is MBR */
83 }
84 
85 
test_part_dos(block_dev_desc_t * dev_desc)86 int test_part_dos (block_dev_desc_t *dev_desc)
87 {
88 	unsigned char buffer[DEFAULT_SECTOR_SIZE];
89 
90 	if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
91 	    (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
92 	    (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
93 		return (-1);
94 	}
95 	return (0);
96 }
97 
98 /*  Print a partition that is relative to its Extended partition table
99  */
print_partition_extended(block_dev_desc_t * dev_desc,int ext_part_sector,int relative,int part_num)100 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative,
101 							   int part_num)
102 {
103 	unsigned char buffer[DEFAULT_SECTOR_SIZE];
104 	dos_partition_t *pt;
105 	int i;
106 
107 	if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
108 		printf ("** Can't read partition table on %d:%d **\n",
109 			dev_desc->dev, ext_part_sector);
110 		return;
111 	}
112 	i=test_block_type(buffer);
113 	if(i==-1) {
114 		printf ("bad MBR sector signature 0x%02x%02x\n",
115 			buffer[DOS_PART_MAGIC_OFFSET],
116 			buffer[DOS_PART_MAGIC_OFFSET + 1]);
117 		return;
118 	}
119 	if(i==DOS_PBR) {
120 		printf ("    1\t\t         0\t%10ld\t%2x\n",
121 			dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
122 		return;
123 	}
124 	/* Print all primary/logical partitions */
125 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
126 	for (i = 0; i < 4; i++, pt++) {
127 		/*
128 		 * fdisk does not show the extended partitions that
129 		 * are not in the MBR
130 		 */
131 
132 		if ((pt->sys_ind != 0) &&
133 		    (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
134 			print_one_part (pt, ext_part_sector, part_num);
135 		}
136 
137 		/* Reverse engr the fdisk part# assignment rule! */
138 		if ((ext_part_sector == 0) ||
139 		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
140 			part_num++;
141 		}
142 	}
143 
144 	/* Follows the extended partitions */
145 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
146 	for (i = 0; i < 4; i++, pt++) {
147 		if (is_extended (pt->sys_ind)) {
148 			int lba_start = le32_to_int (pt->start4) + relative;
149 
150 			print_partition_extended (dev_desc, lba_start,
151 						  ext_part_sector == 0  ? lba_start
152 									: relative,
153 						  part_num);
154 		}
155 	}
156 
157 	return;
158 }
159 
160 
161 /*  Print a partition that is relative to its Extended partition table
162  */
get_partition_info_extended(block_dev_desc_t * dev_desc,int ext_part_sector,int relative,int part_num,int which_part,disk_partition_t * info)163 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
164 				 int relative, int part_num,
165 				 int which_part, disk_partition_t *info)
166 {
167 	unsigned char buffer[DEFAULT_SECTOR_SIZE];
168 	dos_partition_t *pt;
169 	int i;
170 
171 	if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
172 		printf ("** Can't read partition table on %d:%d **\n",
173 			dev_desc->dev, ext_part_sector);
174 		return -1;
175 	}
176 	if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
177 		buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
178 		printf ("bad MBR sector signature 0x%02x%02x\n",
179 			buffer[DOS_PART_MAGIC_OFFSET],
180 			buffer[DOS_PART_MAGIC_OFFSET + 1]);
181 		return -1;
182 	}
183 
184 	/* Print all primary/logical partitions */
185 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
186 	for (i = 0; i < 4; i++, pt++) {
187 		/*
188 		 * fdisk does not show the extended partitions that
189 		 * are not in the MBR
190 		 */
191 		if (((pt->boot_ind & ~0x80) == 0) &&
192 		    (pt->sys_ind != 0) &&
193 		    (part_num == which_part) &&
194 		    (is_extended(pt->sys_ind) == 0)) {
195 			info->blksz = 512;
196 			info->start = ext_part_sector + le32_to_int (pt->start4);
197 			info->size  = le32_to_int (pt->size4);
198 			switch(dev_desc->if_type) {
199 				case IF_TYPE_IDE:
200 				case IF_TYPE_SATA:
201 				case IF_TYPE_ATAPI:
202 					sprintf ((char *)info->name, "hd%c%d",
203 						'a' + dev_desc->dev, part_num);
204 					break;
205 				case IF_TYPE_SCSI:
206 					sprintf ((char *)info->name, "sd%c%d",
207 						'a' + dev_desc->dev, part_num);
208 					break;
209 				case IF_TYPE_USB:
210 					sprintf ((char *)info->name, "usbd%c%d",
211 						'a' + dev_desc->dev, part_num);
212 					break;
213 				case IF_TYPE_DOC:
214 					sprintf ((char *)info->name, "docd%c%d",
215 						'a' + dev_desc->dev, part_num);
216 					break;
217 				default:
218 					sprintf ((char *)info->name, "xx%c%d",
219 						'a' + dev_desc->dev, part_num);
220 					break;
221 			}
222 			/* sprintf(info->type, "%d, pt->sys_ind); */
223 			sprintf ((char *)info->type, "U-Boot");
224 			return 0;
225 		}
226 
227 		/* Reverse engr the fdisk part# assignment rule! */
228 		if ((ext_part_sector == 0) ||
229 		    (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
230 			part_num++;
231 		}
232 	}
233 
234 	/* Follows the extended partitions */
235 	pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
236 	for (i = 0; i < 4; i++, pt++) {
237 		if (is_extended (pt->sys_ind)) {
238 			int lba_start = le32_to_int (pt->start4) + relative;
239 
240 			return get_partition_info_extended (dev_desc, lba_start,
241 				 ext_part_sector == 0 ? lba_start : relative,
242 				 part_num, which_part, info);
243 		}
244 	}
245 	return -1;
246 }
247 
print_part_dos(block_dev_desc_t * dev_desc)248 void print_part_dos (block_dev_desc_t *dev_desc)
249 {
250 	printf ("Partition     Start Sector     Num Sectors     Type\n");
251 	print_partition_extended (dev_desc, 0, 0, 1);
252 }
253 
get_partition_info_dos(block_dev_desc_t * dev_desc,int part,disk_partition_t * info)254 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
255 {
256 	return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
257 }
258 
259 
260 #endif
261