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 return DOS_PBR; /* is PBR */ 82 return DOS_MBR; /* Is MBR */ 83 } 84 85 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 */ 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 */ 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->sys_ind != 0) && 192 (part_num == which_part) && 193 (is_extended(pt->sys_ind) == 0)) { 194 info->blksz = 512; 195 info->start = ext_part_sector + le32_to_int (pt->start4); 196 info->size = le32_to_int (pt->size4); 197 switch(dev_desc->if_type) { 198 case IF_TYPE_IDE: 199 case IF_TYPE_SATA: 200 case IF_TYPE_ATAPI: 201 sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); 202 break; 203 case IF_TYPE_SCSI: 204 sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); 205 break; 206 case IF_TYPE_USB: 207 sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); 208 break; 209 case IF_TYPE_DOC: 210 sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); 211 break; 212 default: 213 sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num); 214 break; 215 } 216 /* sprintf(info->type, "%d, pt->sys_ind); */ 217 sprintf ((char *)info->type, "U-Boot"); 218 return 0; 219 } 220 221 /* Reverse engr the fdisk part# assignment rule! */ 222 if ((ext_part_sector == 0) || 223 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 224 part_num++; 225 } 226 } 227 228 /* Follows the extended partitions */ 229 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 230 for (i = 0; i < 4; i++, pt++) { 231 if (is_extended (pt->sys_ind)) { 232 int lba_start = le32_to_int (pt->start4) + relative; 233 234 return get_partition_info_extended (dev_desc, lba_start, 235 ext_part_sector == 0 ? lba_start : relative, 236 part_num, which_part, info); 237 } 238 } 239 return -1; 240 } 241 242 void print_part_dos (block_dev_desc_t *dev_desc) 243 { 244 printf ("Partition Start Sector Num Sectors Type\n"); 245 print_partition_extended (dev_desc, 0, 0, 1); 246 } 247 248 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 249 { 250 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 251 } 252 253 254 #endif 255