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