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 inline int is_bootable(dos_partition_t *p) 64 { 65 return p->boot_ind == 0x80; 66 } 67 68 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) 69 { 70 int lba_start = ext_part_sector + le32_to_int (p->start4); 71 int lba_size = le32_to_int (p->size4); 72 73 printf("%5d\t\t%10d\t%10d\t%2x%s%s\n", 74 part_num, lba_start, lba_size, p->sys_ind, 75 (is_extended(p->sys_ind) ? " Extd" : ""), 76 (is_bootable(p) ? " Boot" : "")); 77 } 78 79 static int test_block_type(unsigned char *buffer) 80 { 81 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 82 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 83 return (-1); 84 } /* no DOS Signature at all */ 85 if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 || 86 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) { 87 return DOS_PBR; /* is PBR */ 88 } 89 return DOS_MBR; /* Is MBR */ 90 } 91 92 93 int test_part_dos (block_dev_desc_t *dev_desc) 94 { 95 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 96 97 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) 98 return -1; 99 100 if (test_block_type(buffer) != DOS_MBR) 101 return -1; 102 103 return 0; 104 } 105 106 /* Print a partition that is relative to its Extended partition table 107 */ 108 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 109 int part_num) 110 { 111 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 112 dos_partition_t *pt; 113 int i; 114 115 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 116 printf ("** Can't read partition table on %d:%d **\n", 117 dev_desc->dev, ext_part_sector); 118 return; 119 } 120 i=test_block_type(buffer); 121 if (i != DOS_MBR) { 122 printf ("bad MBR sector signature 0x%02x%02x\n", 123 buffer[DOS_PART_MAGIC_OFFSET], 124 buffer[DOS_PART_MAGIC_OFFSET + 1]); 125 return; 126 } 127 128 /* Print all primary/logical partitions */ 129 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 130 for (i = 0; i < 4; i++, pt++) { 131 /* 132 * fdisk does not show the extended partitions that 133 * are not in the MBR 134 */ 135 136 if ((pt->sys_ind != 0) && 137 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 138 print_one_part (pt, ext_part_sector, part_num); 139 } 140 141 /* Reverse engr the fdisk part# assignment rule! */ 142 if ((ext_part_sector == 0) || 143 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 144 part_num++; 145 } 146 } 147 148 /* Follows the extended partitions */ 149 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 150 for (i = 0; i < 4; i++, pt++) { 151 if (is_extended (pt->sys_ind)) { 152 int lba_start = le32_to_int (pt->start4) + relative; 153 154 print_partition_extended (dev_desc, lba_start, 155 ext_part_sector == 0 ? lba_start 156 : relative, 157 part_num); 158 } 159 } 160 161 return; 162 } 163 164 165 /* Print a partition that is relative to its Extended partition table 166 */ 167 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 168 int relative, int part_num, 169 int which_part, disk_partition_t *info, 170 unsigned int disksig) 171 { 172 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 173 dos_partition_t *pt; 174 int i; 175 176 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 177 printf ("** Can't read partition table on %d:%d **\n", 178 dev_desc->dev, ext_part_sector); 179 return -1; 180 } 181 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 182 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 183 printf ("bad MBR sector signature 0x%02x%02x\n", 184 buffer[DOS_PART_MAGIC_OFFSET], 185 buffer[DOS_PART_MAGIC_OFFSET + 1]); 186 return -1; 187 } 188 189 #ifdef CONFIG_PARTITION_UUIDS 190 if (!ext_part_sector) 191 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 192 #endif 193 194 /* Print all primary/logical partitions */ 195 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 196 for (i = 0; i < 4; i++, pt++) { 197 /* 198 * fdisk does not show the extended partitions that 199 * are not in the MBR 200 */ 201 if (((pt->boot_ind & ~0x80) == 0) && 202 (pt->sys_ind != 0) && 203 (part_num == which_part) && 204 (is_extended(pt->sys_ind) == 0)) { 205 info->blksz = 512; 206 info->start = ext_part_sector + le32_to_int (pt->start4); 207 info->size = le32_to_int (pt->size4); 208 switch(dev_desc->if_type) { 209 case IF_TYPE_IDE: 210 case IF_TYPE_SATA: 211 case IF_TYPE_ATAPI: 212 sprintf ((char *)info->name, "hd%c%d", 213 'a' + dev_desc->dev, part_num); 214 break; 215 case IF_TYPE_SCSI: 216 sprintf ((char *)info->name, "sd%c%d", 217 'a' + dev_desc->dev, part_num); 218 break; 219 case IF_TYPE_USB: 220 sprintf ((char *)info->name, "usbd%c%d", 221 'a' + dev_desc->dev, part_num); 222 break; 223 case IF_TYPE_DOC: 224 sprintf ((char *)info->name, "docd%c%d", 225 'a' + dev_desc->dev, part_num); 226 break; 227 default: 228 sprintf ((char *)info->name, "xx%c%d", 229 'a' + dev_desc->dev, part_num); 230 break; 231 } 232 /* sprintf(info->type, "%d, pt->sys_ind); */ 233 sprintf ((char *)info->type, "U-Boot"); 234 info->bootable = is_bootable(pt); 235 #ifdef CONFIG_PARTITION_UUIDS 236 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 237 #endif 238 return 0; 239 } 240 241 /* Reverse engr the fdisk part# assignment rule! */ 242 if ((ext_part_sector == 0) || 243 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 244 part_num++; 245 } 246 } 247 248 /* Follows the extended partitions */ 249 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 250 for (i = 0; i < 4; i++, pt++) { 251 if (is_extended (pt->sys_ind)) { 252 int lba_start = le32_to_int (pt->start4) + relative; 253 254 return get_partition_info_extended (dev_desc, lba_start, 255 ext_part_sector == 0 ? lba_start : relative, 256 part_num, which_part, info, disksig); 257 } 258 } 259 return -1; 260 } 261 262 void print_part_dos (block_dev_desc_t *dev_desc) 263 { 264 printf ("Partition Start Sector Num Sectors Type\n"); 265 print_partition_extended (dev_desc, 0, 0, 1); 266 } 267 268 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 269 { 270 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 271 } 272 273 274 #endif 275