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