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 <cmd_disk.h> 37 #include "part_dos.h" 38 39 #if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_DOS_PARTITION) 40 41 /* Convert char[4] in little endian format to the host format integer 42 */ 43 static inline int le32_to_int(unsigned char *le32) 44 { 45 return ((le32[3] << 24) + 46 (le32[2] << 16) + 47 (le32[1] << 8) + 48 le32[0] 49 ); 50 } 51 52 static inline int is_extended(int part_type) 53 { 54 return (part_type == 0x5 || 55 part_type == 0xf || 56 part_type == 0x85); 57 } 58 59 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) 60 { 61 int lba_start = ext_part_sector + le32_to_int (p->start4); 62 int lba_size = le32_to_int (p->size4); 63 64 printf ("%5d\t\t%10d\t%10d\t%2x%s\n", 65 part_num, lba_start, lba_size, p->sys_ind, 66 (is_extended (p->sys_ind) ? " Extd" : "")); 67 } 68 69 70 int test_part_dos (block_dev_desc_t *dev_desc) 71 { 72 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 73 74 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || 75 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 76 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 77 return (-1); 78 } 79 return (0); 80 } 81 82 /* Print a partition that is relative to its Extended partition table 83 */ 84 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 85 int part_num) 86 { 87 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 88 dos_partition_t *pt; 89 int i; 90 91 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 92 printf ("** Can't read partition table on %d:%d **\n", 93 dev_desc->dev, ext_part_sector); 94 return; 95 } 96 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 97 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 98 printf ("bad MBR sector signature 0x%02x%02x\n", 99 buffer[DOS_PART_MAGIC_OFFSET], 100 buffer[DOS_PART_MAGIC_OFFSET + 1]); 101 return; 102 } 103 104 /* Print all primary/logical partitions */ 105 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 106 for (i = 0; i < 4; i++, pt++) { 107 /* 108 * fdisk does not show the extended partitions that 109 * are not in the MBR 110 */ 111 112 if ((pt->sys_ind != 0) && 113 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 114 print_one_part (pt, ext_part_sector, part_num); 115 } 116 117 /* Reverse engr the fdisk part# assignment rule! */ 118 if ((ext_part_sector == 0) || 119 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 120 part_num++; 121 } 122 } 123 124 /* Follows the extended partitions */ 125 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 126 for (i = 0; i < 4; i++, pt++) { 127 if (is_extended (pt->sys_ind)) { 128 int lba_start = le32_to_int (pt->start4) + relative; 129 130 print_partition_extended (dev_desc, lba_start, 131 ext_part_sector == 0 ? lba_start 132 : relative, 133 part_num); 134 } 135 } 136 137 return; 138 } 139 140 141 /* Print a partition that is relative to its Extended partition table 142 */ 143 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 144 int relative, int part_num, 145 int which_part, disk_partition_t *info) 146 { 147 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 148 dos_partition_t *pt; 149 int i; 150 151 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 152 printf ("** Can't read partition table on %d:%d **\n", 153 dev_desc->dev, ext_part_sector); 154 return -1; 155 } 156 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 157 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 158 printf ("bad MBR sector signature 0x%02x%02x\n", 159 buffer[DOS_PART_MAGIC_OFFSET], 160 buffer[DOS_PART_MAGIC_OFFSET + 1]); 161 return -1; 162 } 163 164 /* Print all primary/logical partitions */ 165 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 166 for (i = 0; i < 4; i++, pt++) { 167 /* 168 * fdisk does not show the extended partitions that 169 * are not in the MBR 170 */ 171 if ((pt->sys_ind != 0) && 172 (part_num == which_part) && 173 (is_extended(pt->sys_ind) == 0)) { 174 info->blksz = 512; 175 info->start = ext_part_sector + le32_to_int (pt->start4); 176 info->size = le32_to_int (pt->size4); 177 switch(dev_desc->if_type) { 178 case IF_TYPE_IDE: 179 case IF_TYPE_ATAPI: 180 sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); 181 break; 182 case IF_TYPE_SCSI: 183 sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); 184 break; 185 case IF_TYPE_USB: 186 sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); 187 break; 188 case IF_TYPE_DOC: 189 sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); 190 break; 191 default: 192 sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num); 193 break; 194 } 195 /* sprintf(info->type, "%d, pt->sys_ind); */ 196 sprintf (info->type, "U-Boot"); 197 return 0; 198 } 199 200 /* Reverse engr the fdisk part# assignment rule! */ 201 if ((ext_part_sector == 0) || 202 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 203 part_num++; 204 } 205 } 206 207 /* Follows the extended partitions */ 208 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 209 for (i = 0; i < 4; i++, pt++) { 210 if (is_extended (pt->sys_ind)) { 211 int lba_start = le32_to_int (pt->start4) + relative; 212 213 return get_partition_info_extended (dev_desc, lba_start, 214 ext_part_sector == 0 ? lba_start : relative, 215 part_num, which_part, info); 216 } 217 } 218 return -1; 219 } 220 221 void print_part_dos (block_dev_desc_t *dev_desc) 222 { 223 printf ("Partition Start Sector Num Sectors Type\n"); 224 print_partition_extended (dev_desc, 0, 0, 1); 225 } 226 227 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 228 { 229 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 230 } 231 232 233 #endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */ 234