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 */ 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 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 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 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 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) { 82 return DOS_PBR; /* is PBR */ 83 } 84 return DOS_MBR; /* Is MBR */ 85 } 86 87 88 int test_part_dos (block_dev_desc_t *dev_desc) 89 { 90 unsigned char buffer[dev_desc->blksz]; 91 92 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || 93 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 94 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 95 return (-1); 96 } 97 return (0); 98 } 99 100 /* Print a partition that is relative to its Extended partition table 101 */ 102 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 103 int part_num) 104 { 105 unsigned char buffer[dev_desc->blksz]; 106 dos_partition_t *pt; 107 int i; 108 109 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 110 printf ("** Can't read partition table on %d:%d **\n", 111 dev_desc->dev, ext_part_sector); 112 return; 113 } 114 i=test_block_type(buffer); 115 if(i==-1) { 116 printf ("bad MBR sector signature 0x%02x%02x\n", 117 buffer[DOS_PART_MAGIC_OFFSET], 118 buffer[DOS_PART_MAGIC_OFFSET + 1]); 119 return; 120 } 121 if(i==DOS_PBR) { 122 printf (" 1\t\t 0\t%10ld\t%2x\n", 123 dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); 124 return; 125 } 126 /* Print all primary/logical partitions */ 127 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 128 for (i = 0; i < 4; i++, pt++) { 129 /* 130 * fdisk does not show the extended partitions that 131 * are not in the MBR 132 */ 133 134 if ((pt->sys_ind != 0) && 135 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 136 print_one_part (pt, ext_part_sector, part_num); 137 } 138 139 /* Reverse engr the fdisk part# assignment rule! */ 140 if ((ext_part_sector == 0) || 141 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 142 part_num++; 143 } 144 } 145 146 /* Follows the extended partitions */ 147 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 148 for (i = 0; i < 4; i++, pt++) { 149 if (is_extended (pt->sys_ind)) { 150 int lba_start = le32_to_int (pt->start4) + relative; 151 152 print_partition_extended (dev_desc, lba_start, 153 ext_part_sector == 0 ? lba_start 154 : relative, 155 part_num); 156 } 157 } 158 159 return; 160 } 161 162 163 /* Print a partition that is relative to its Extended partition table 164 */ 165 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 166 int relative, int part_num, 167 int which_part, disk_partition_t *info) 168 { 169 unsigned char buffer[dev_desc->blksz]; 170 dos_partition_t *pt; 171 int i; 172 173 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 174 printf ("** Can't read partition table on %d:%d **\n", 175 dev_desc->dev, ext_part_sector); 176 return -1; 177 } 178 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 179 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 180 printf ("bad MBR sector signature 0x%02x%02x\n", 181 buffer[DOS_PART_MAGIC_OFFSET], 182 buffer[DOS_PART_MAGIC_OFFSET + 1]); 183 return -1; 184 } 185 186 /* Print all primary/logical partitions */ 187 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 188 for (i = 0; i < 4; i++, pt++) { 189 /* 190 * fdisk does not show the extended partitions that 191 * are not in the MBR 192 */ 193 if (((pt->boot_ind & ~0x80) == 0) && 194 (pt->sys_ind != 0) && 195 (part_num == which_part) && 196 (is_extended(pt->sys_ind) == 0)) { 197 info->blksz = 512; 198 info->start = ext_part_sector + le32_to_int (pt->start4); 199 info->size = le32_to_int (pt->size4); 200 switch(dev_desc->if_type) { 201 case IF_TYPE_IDE: 202 case IF_TYPE_SATA: 203 case IF_TYPE_ATAPI: 204 sprintf ((char *)info->name, "hd%c%d", 205 'a' + dev_desc->dev, part_num); 206 break; 207 case IF_TYPE_SCSI: 208 sprintf ((char *)info->name, "sd%c%d", 209 'a' + dev_desc->dev, part_num); 210 break; 211 case IF_TYPE_USB: 212 sprintf ((char *)info->name, "usbd%c%d", 213 'a' + dev_desc->dev, part_num); 214 break; 215 case IF_TYPE_DOC: 216 sprintf ((char *)info->name, "docd%c%d", 217 'a' + dev_desc->dev, part_num); 218 break; 219 default: 220 sprintf ((char *)info->name, "xx%c%d", 221 'a' + dev_desc->dev, part_num); 222 break; 223 } 224 /* sprintf(info->type, "%d, pt->sys_ind); */ 225 sprintf ((char *)info->type, "U-Boot"); 226 return 0; 227 } 228 229 /* Reverse engr the fdisk part# assignment rule! */ 230 if ((ext_part_sector == 0) || 231 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 232 part_num++; 233 } 234 } 235 236 /* Follows the extended partitions */ 237 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 238 for (i = 0; i < 4; i++, pt++) { 239 if (is_extended (pt->sys_ind)) { 240 int lba_start = le32_to_int (pt->start4) + relative; 241 242 return get_partition_info_extended (dev_desc, lba_start, 243 ext_part_sector == 0 ? lba_start : relative, 244 part_num, which_part, info); 245 } 246 } 247 return -1; 248 } 249 250 void print_part_dos (block_dev_desc_t *dev_desc) 251 { 252 printf ("Partition Start Sector Num Sectors Type\n"); 253 print_partition_extended (dev_desc, 0, 0, 1); 254 } 255 256 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 257 { 258 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 259 } 260 261 262 #endif 263