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