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, unsigned int disksig) 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("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n", 75 part_num, lba_start, lba_size, disksig, part_num, 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, unsigned int disksig) 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 if (!ext_part_sector) 131 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 132 133 /* Print all primary/logical partitions */ 134 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 135 for (i = 0; i < 4; i++, pt++) { 136 /* 137 * fdisk does not show the extended partitions that 138 * are not in the MBR 139 */ 140 141 if ((pt->sys_ind != 0) && 142 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 143 print_one_part(pt, ext_part_sector, part_num, disksig); 144 } 145 146 /* Reverse engr the fdisk part# assignment rule! */ 147 if ((ext_part_sector == 0) || 148 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 149 part_num++; 150 } 151 } 152 153 /* Follows the extended partitions */ 154 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 155 for (i = 0; i < 4; i++, pt++) { 156 if (is_extended (pt->sys_ind)) { 157 int lba_start = le32_to_int (pt->start4) + relative; 158 159 print_partition_extended(dev_desc, lba_start, 160 ext_part_sector == 0 ? lba_start : relative, 161 part_num, disksig); 162 } 163 } 164 165 return; 166 } 167 168 169 /* Print a partition that is relative to its Extended partition table 170 */ 171 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 172 int relative, int part_num, 173 int which_part, disk_partition_t *info, 174 unsigned int disksig) 175 { 176 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 177 dos_partition_t *pt; 178 int i; 179 180 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 181 printf ("** Can't read partition table on %d:%d **\n", 182 dev_desc->dev, ext_part_sector); 183 return -1; 184 } 185 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 186 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 187 printf ("bad MBR sector signature 0x%02x%02x\n", 188 buffer[DOS_PART_MAGIC_OFFSET], 189 buffer[DOS_PART_MAGIC_OFFSET + 1]); 190 return -1; 191 } 192 193 #ifdef CONFIG_PARTITION_UUIDS 194 if (!ext_part_sector) 195 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 196 #endif 197 198 /* Print all primary/logical partitions */ 199 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 200 for (i = 0; i < 4; i++, pt++) { 201 /* 202 * fdisk does not show the extended partitions that 203 * are not in the MBR 204 */ 205 if (((pt->boot_ind & ~0x80) == 0) && 206 (pt->sys_ind != 0) && 207 (part_num == which_part) && 208 (is_extended(pt->sys_ind) == 0)) { 209 info->blksz = 512; 210 info->start = ext_part_sector + le32_to_int (pt->start4); 211 info->size = le32_to_int (pt->size4); 212 switch(dev_desc->if_type) { 213 case IF_TYPE_IDE: 214 case IF_TYPE_SATA: 215 case IF_TYPE_ATAPI: 216 sprintf ((char *)info->name, "hd%c%d", 217 'a' + dev_desc->dev, part_num); 218 break; 219 case IF_TYPE_SCSI: 220 sprintf ((char *)info->name, "sd%c%d", 221 'a' + dev_desc->dev, part_num); 222 break; 223 case IF_TYPE_USB: 224 sprintf ((char *)info->name, "usbd%c%d", 225 'a' + dev_desc->dev, part_num); 226 break; 227 case IF_TYPE_DOC: 228 sprintf ((char *)info->name, "docd%c%d", 229 'a' + dev_desc->dev, part_num); 230 break; 231 default: 232 sprintf ((char *)info->name, "xx%c%d", 233 'a' + dev_desc->dev, part_num); 234 break; 235 } 236 /* sprintf(info->type, "%d, pt->sys_ind); */ 237 sprintf ((char *)info->type, "U-Boot"); 238 info->bootable = is_bootable(pt); 239 #ifdef CONFIG_PARTITION_UUIDS 240 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 241 #endif 242 return 0; 243 } 244 245 /* Reverse engr the fdisk part# assignment rule! */ 246 if ((ext_part_sector == 0) || 247 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 248 part_num++; 249 } 250 } 251 252 /* Follows the extended partitions */ 253 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 254 for (i = 0; i < 4; i++, pt++) { 255 if (is_extended (pt->sys_ind)) { 256 int lba_start = le32_to_int (pt->start4) + relative; 257 258 return get_partition_info_extended (dev_desc, lba_start, 259 ext_part_sector == 0 ? lba_start : relative, 260 part_num, which_part, info, disksig); 261 } 262 } 263 return -1; 264 } 265 266 void print_part_dos (block_dev_desc_t *dev_desc) 267 { 268 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 269 print_partition_extended(dev_desc, 0, 0, 1, 0); 270 } 271 272 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 273 { 274 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 275 } 276 277 278 #endif 279