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 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 99 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 100 return (-1); 101 } 102 return (0); 103 } 104 105 /* Print a partition that is relative to its Extended partition table 106 */ 107 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 108 int part_num) 109 { 110 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 111 dos_partition_t *pt; 112 int i; 113 114 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 115 printf ("** Can't read partition table on %d:%d **\n", 116 dev_desc->dev, ext_part_sector); 117 return; 118 } 119 i=test_block_type(buffer); 120 if(i==-1) { 121 printf ("bad MBR sector signature 0x%02x%02x\n", 122 buffer[DOS_PART_MAGIC_OFFSET], 123 buffer[DOS_PART_MAGIC_OFFSET + 1]); 124 return; 125 } 126 if(i==DOS_PBR) { 127 printf (" 1\t\t 0\t%10ld\t%2x\n", 128 dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); 129 return; 130 } 131 /* Print all primary/logical partitions */ 132 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 133 for (i = 0; i < 4; i++, pt++) { 134 /* 135 * fdisk does not show the extended partitions that 136 * are not in the MBR 137 */ 138 139 if ((pt->sys_ind != 0) && 140 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 141 print_one_part (pt, ext_part_sector, part_num); 142 } 143 144 /* Reverse engr the fdisk part# assignment rule! */ 145 if ((ext_part_sector == 0) || 146 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 147 part_num++; 148 } 149 } 150 151 /* Follows the extended partitions */ 152 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 153 for (i = 0; i < 4; i++, pt++) { 154 if (is_extended (pt->sys_ind)) { 155 int lba_start = le32_to_int (pt->start4) + relative; 156 157 print_partition_extended (dev_desc, lba_start, 158 ext_part_sector == 0 ? lba_start 159 : relative, 160 part_num); 161 } 162 } 163 164 return; 165 } 166 167 168 /* Print a partition that is relative to its Extended partition table 169 */ 170 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 171 int relative, int part_num, 172 int which_part, disk_partition_t *info) 173 { 174 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 175 dos_partition_t *pt; 176 int i; 177 178 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 179 printf ("** Can't read partition table on %d:%d **\n", 180 dev_desc->dev, ext_part_sector); 181 return -1; 182 } 183 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 184 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 185 printf ("bad MBR sector signature 0x%02x%02x\n", 186 buffer[DOS_PART_MAGIC_OFFSET], 187 buffer[DOS_PART_MAGIC_OFFSET + 1]); 188 return -1; 189 } 190 191 /* Print all primary/logical partitions */ 192 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 193 for (i = 0; i < 4; i++, pt++) { 194 /* 195 * fdisk does not show the extended partitions that 196 * are not in the MBR 197 */ 198 if (((pt->boot_ind & ~0x80) == 0) && 199 (pt->sys_ind != 0) && 200 (part_num == which_part) && 201 (is_extended(pt->sys_ind) == 0)) { 202 info->blksz = 512; 203 info->start = ext_part_sector + le32_to_int (pt->start4); 204 info->size = le32_to_int (pt->size4); 205 switch(dev_desc->if_type) { 206 case IF_TYPE_IDE: 207 case IF_TYPE_SATA: 208 case IF_TYPE_ATAPI: 209 sprintf ((char *)info->name, "hd%c%d", 210 'a' + dev_desc->dev, part_num); 211 break; 212 case IF_TYPE_SCSI: 213 sprintf ((char *)info->name, "sd%c%d", 214 'a' + dev_desc->dev, part_num); 215 break; 216 case IF_TYPE_USB: 217 sprintf ((char *)info->name, "usbd%c%d", 218 'a' + dev_desc->dev, part_num); 219 break; 220 case IF_TYPE_DOC: 221 sprintf ((char *)info->name, "docd%c%d", 222 'a' + dev_desc->dev, part_num); 223 break; 224 default: 225 sprintf ((char *)info->name, "xx%c%d", 226 'a' + dev_desc->dev, part_num); 227 break; 228 } 229 /* sprintf(info->type, "%d, pt->sys_ind); */ 230 sprintf ((char *)info->type, "U-Boot"); 231 info->bootable = is_bootable(pt); 232 return 0; 233 } 234 235 /* Reverse engr the fdisk part# assignment rule! */ 236 if ((ext_part_sector == 0) || 237 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 238 part_num++; 239 } 240 } 241 242 /* Follows the extended partitions */ 243 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 244 for (i = 0; i < 4; i++, pt++) { 245 if (is_extended (pt->sys_ind)) { 246 int lba_start = le32_to_int (pt->start4) + relative; 247 248 return get_partition_info_extended (dev_desc, lba_start, 249 ext_part_sector == 0 ? lba_start : relative, 250 part_num, which_part, info); 251 } 252 } 253 return -1; 254 } 255 256 void print_part_dos (block_dev_desc_t *dev_desc) 257 { 258 printf ("Partition Start Sector Num Sectors Type\n"); 259 print_partition_extended (dev_desc, 0, 0, 1); 260 } 261 262 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 263 { 264 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 265 } 266 267 268 #endif 269