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