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 #ifdef HAVE_BLOCK_DEVICE 39 40 /* Convert char[4] in little endian format to the host format integer 41 */ 42 static inline int le32_to_int(unsigned char *le32) 43 { 44 return ((le32[3] << 24) + 45 (le32[2] << 16) + 46 (le32[1] << 8) + 47 le32[0] 48 ); 49 } 50 51 static inline int is_extended(int part_type) 52 { 53 return (part_type == 0x5 || 54 part_type == 0xf || 55 part_type == 0x85); 56 } 57 58 static inline int is_bootable(dos_partition_t *p) 59 { 60 return p->boot_ind == 0x80; 61 } 62 63 static void print_one_part(dos_partition_t *p, int ext_part_sector, 64 int part_num, unsigned int disksig) 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("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n", 70 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind, 71 (is_extended(p->sys_ind) ? " Extd" : ""), 72 (is_bootable(p) ? " Boot" : "")); 73 } 74 75 static int test_block_type(unsigned char *buffer) 76 { 77 int slot; 78 struct dos_partition *p; 79 80 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 81 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 82 return (-1); 83 } /* no DOS Signature at all */ 84 p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET]; 85 for (slot = 0; slot < 3; slot++) { 86 if (p->boot_ind != 0 && p->boot_ind != 0x80) { 87 if (!slot && 88 (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET], 89 "FAT", 3) == 0 || 90 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET], 91 "FAT32", 5) == 0)) { 92 return DOS_PBR; /* is PBR */ 93 } else { 94 return -1; 95 } 96 } 97 } 98 return DOS_MBR; /* Is MBR */ 99 } 100 101 102 int test_part_dos (block_dev_desc_t *dev_desc) 103 { 104 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 105 106 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) 107 return -1; 108 109 if (test_block_type(buffer) != DOS_MBR) 110 return -1; 111 112 return 0; 113 } 114 115 /* Print a partition that is relative to its Extended partition table 116 */ 117 static void print_partition_extended(block_dev_desc_t *dev_desc, 118 int ext_part_sector, int relative, 119 int part_num, unsigned int disksig) 120 { 121 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 122 dos_partition_t *pt; 123 int i; 124 125 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 126 printf ("** Can't read partition table on %d:%d **\n", 127 dev_desc->dev, ext_part_sector); 128 return; 129 } 130 i=test_block_type(buffer); 131 if (i != DOS_MBR) { 132 printf ("bad MBR sector signature 0x%02x%02x\n", 133 buffer[DOS_PART_MAGIC_OFFSET], 134 buffer[DOS_PART_MAGIC_OFFSET + 1]); 135 return; 136 } 137 138 if (!ext_part_sector) 139 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 140 141 /* Print all primary/logical partitions */ 142 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 143 for (i = 0; i < 4; i++, pt++) { 144 /* 145 * fdisk does not show the extended partitions that 146 * are not in the MBR 147 */ 148 149 if ((pt->sys_ind != 0) && 150 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 151 print_one_part(pt, ext_part_sector, part_num, disksig); 152 } 153 154 /* Reverse engr the fdisk part# assignment rule! */ 155 if ((ext_part_sector == 0) || 156 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 157 part_num++; 158 } 159 } 160 161 /* Follows the extended partitions */ 162 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 163 for (i = 0; i < 4; i++, pt++) { 164 if (is_extended (pt->sys_ind)) { 165 int lba_start = le32_to_int (pt->start4) + relative; 166 167 print_partition_extended(dev_desc, lba_start, 168 ext_part_sector == 0 ? lba_start : relative, 169 part_num, disksig); 170 } 171 } 172 173 return; 174 } 175 176 177 /* Print a partition that is relative to its Extended partition table 178 */ 179 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 180 int relative, int part_num, 181 int which_part, disk_partition_t *info, 182 unsigned int disksig) 183 { 184 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 185 dos_partition_t *pt; 186 int i; 187 188 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 189 printf ("** Can't read partition table on %d:%d **\n", 190 dev_desc->dev, ext_part_sector); 191 return -1; 192 } 193 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 194 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 195 printf ("bad MBR sector signature 0x%02x%02x\n", 196 buffer[DOS_PART_MAGIC_OFFSET], 197 buffer[DOS_PART_MAGIC_OFFSET + 1]); 198 return -1; 199 } 200 201 #ifdef CONFIG_PARTITION_UUIDS 202 if (!ext_part_sector) 203 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 204 #endif 205 206 /* Print all primary/logical partitions */ 207 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 208 for (i = 0; i < 4; i++, pt++) { 209 /* 210 * fdisk does not show the extended partitions that 211 * are not in the MBR 212 */ 213 if (((pt->boot_ind & ~0x80) == 0) && 214 (pt->sys_ind != 0) && 215 (part_num == which_part) && 216 (is_extended(pt->sys_ind) == 0)) { 217 info->blksz = 512; 218 info->start = ext_part_sector + le32_to_int (pt->start4); 219 info->size = le32_to_int (pt->size4); 220 switch(dev_desc->if_type) { 221 case IF_TYPE_IDE: 222 case IF_TYPE_SATA: 223 case IF_TYPE_ATAPI: 224 sprintf ((char *)info->name, "hd%c%d", 225 'a' + dev_desc->dev, part_num); 226 break; 227 case IF_TYPE_SCSI: 228 sprintf ((char *)info->name, "sd%c%d", 229 'a' + dev_desc->dev, part_num); 230 break; 231 case IF_TYPE_USB: 232 sprintf ((char *)info->name, "usbd%c%d", 233 'a' + dev_desc->dev, part_num); 234 break; 235 case IF_TYPE_DOC: 236 sprintf ((char *)info->name, "docd%c%d", 237 'a' + dev_desc->dev, part_num); 238 break; 239 default: 240 sprintf ((char *)info->name, "xx%c%d", 241 'a' + dev_desc->dev, part_num); 242 break; 243 } 244 /* sprintf(info->type, "%d, pt->sys_ind); */ 245 sprintf ((char *)info->type, "U-Boot"); 246 info->bootable = is_bootable(pt); 247 #ifdef CONFIG_PARTITION_UUIDS 248 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 249 #endif 250 return 0; 251 } 252 253 /* Reverse engr the fdisk part# assignment rule! */ 254 if ((ext_part_sector == 0) || 255 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 256 part_num++; 257 } 258 } 259 260 /* Follows the extended partitions */ 261 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 262 for (i = 0; i < 4; i++, pt++) { 263 if (is_extended (pt->sys_ind)) { 264 int lba_start = le32_to_int (pt->start4) + relative; 265 266 return get_partition_info_extended (dev_desc, lba_start, 267 ext_part_sector == 0 ? lba_start : relative, 268 part_num, which_part, info, disksig); 269 } 270 } 271 return -1; 272 } 273 274 void print_part_dos (block_dev_desc_t *dev_desc) 275 { 276 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 277 print_partition_extended(dev_desc, 0, 0, 1, 0); 278 } 279 280 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 281 { 282 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 283 } 284 285 286 #endif 287