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 void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) 64 { 65 int lba_start = ext_part_sector + le32_to_int (p->start4); 66 int lba_size = le32_to_int (p->size4); 67 68 printf ("%5d\t\t%10d\t%10d\t%2x%s\n", 69 part_num, lba_start, lba_size, p->sys_ind, 70 (is_extended (p->sys_ind) ? " Extd" : "")); 71 } 72 73 static int test_block_type(unsigned char *buffer) 74 { 75 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 76 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 77 return (-1); 78 } /* no DOS Signature at all */ 79 if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 || 80 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) { 81 return DOS_PBR; /* is PBR */ 82 } 83 return DOS_MBR; /* Is MBR */ 84 } 85 86 87 int test_part_dos (block_dev_desc_t *dev_desc) 88 { 89 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 90 91 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || 92 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 93 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 94 return (-1); 95 } 96 return (0); 97 } 98 99 /* Print a partition that is relative to its Extended partition table 100 */ 101 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 102 int part_num) 103 { 104 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 105 dos_partition_t *pt; 106 int i; 107 108 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 109 printf ("** Can't read partition table on %d:%d **\n", 110 dev_desc->dev, ext_part_sector); 111 return; 112 } 113 i=test_block_type(buffer); 114 if(i==-1) { 115 printf ("bad MBR sector signature 0x%02x%02x\n", 116 buffer[DOS_PART_MAGIC_OFFSET], 117 buffer[DOS_PART_MAGIC_OFFSET + 1]); 118 return; 119 } 120 if(i==DOS_PBR) { 121 printf (" 1\t\t 0\t%10ld\t%2x\n", 122 dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); 123 return; 124 } 125 /* Print all primary/logical partitions */ 126 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 127 for (i = 0; i < 4; i++, pt++) { 128 /* 129 * fdisk does not show the extended partitions that 130 * are not in the MBR 131 */ 132 133 if ((pt->sys_ind != 0) && 134 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 135 print_one_part (pt, ext_part_sector, part_num); 136 } 137 138 /* Reverse engr the fdisk part# assignment rule! */ 139 if ((ext_part_sector == 0) || 140 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 141 part_num++; 142 } 143 } 144 145 /* Follows the extended partitions */ 146 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 147 for (i = 0; i < 4; i++, pt++) { 148 if (is_extended (pt->sys_ind)) { 149 int lba_start = le32_to_int (pt->start4) + relative; 150 151 print_partition_extended (dev_desc, lba_start, 152 ext_part_sector == 0 ? lba_start 153 : relative, 154 part_num); 155 } 156 } 157 158 return; 159 } 160 161 162 /* Print a partition that is relative to its Extended partition table 163 */ 164 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 165 int relative, int part_num, 166 int which_part, disk_partition_t *info) 167 { 168 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 169 dos_partition_t *pt; 170 int i; 171 172 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 173 printf ("** Can't read partition table on %d:%d **\n", 174 dev_desc->dev, ext_part_sector); 175 return -1; 176 } 177 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 178 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 179 printf ("bad MBR sector signature 0x%02x%02x\n", 180 buffer[DOS_PART_MAGIC_OFFSET], 181 buffer[DOS_PART_MAGIC_OFFSET + 1]); 182 return -1; 183 } 184 185 /* Print all primary/logical partitions */ 186 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 187 for (i = 0; i < 4; i++, pt++) { 188 /* 189 * fdisk does not show the extended partitions that 190 * are not in the MBR 191 */ 192 if (((pt->boot_ind & ~0x80) == 0) && 193 (pt->sys_ind != 0) && 194 (part_num == which_part) && 195 (is_extended(pt->sys_ind) == 0)) { 196 info->blksz = 512; 197 info->start = ext_part_sector + le32_to_int (pt->start4); 198 info->size = le32_to_int (pt->size4); 199 switch(dev_desc->if_type) { 200 case IF_TYPE_IDE: 201 case IF_TYPE_SATA: 202 case IF_TYPE_ATAPI: 203 sprintf ((char *)info->name, "hd%c%d", 204 'a' + dev_desc->dev, part_num); 205 break; 206 case IF_TYPE_SCSI: 207 sprintf ((char *)info->name, "sd%c%d", 208 'a' + dev_desc->dev, part_num); 209 break; 210 case IF_TYPE_USB: 211 sprintf ((char *)info->name, "usbd%c%d", 212 'a' + dev_desc->dev, part_num); 213 break; 214 case IF_TYPE_DOC: 215 sprintf ((char *)info->name, "docd%c%d", 216 'a' + dev_desc->dev, part_num); 217 break; 218 default: 219 sprintf ((char *)info->name, "xx%c%d", 220 'a' + dev_desc->dev, part_num); 221 break; 222 } 223 /* sprintf(info->type, "%d, pt->sys_ind); */ 224 sprintf ((char *)info->type, "U-Boot"); 225 return 0; 226 } 227 228 /* Reverse engr the fdisk part# assignment rule! */ 229 if ((ext_part_sector == 0) || 230 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 231 part_num++; 232 } 233 } 234 235 /* Follows the extended partitions */ 236 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 237 for (i = 0; i < 4; i++, pt++) { 238 if (is_extended (pt->sys_ind)) { 239 int lba_start = le32_to_int (pt->start4) + relative; 240 241 return get_partition_info_extended (dev_desc, lba_start, 242 ext_part_sector == 0 ? lba_start : relative, 243 part_num, which_part, info); 244 } 245 } 246 return -1; 247 } 248 249 void print_part_dos (block_dev_desc_t *dev_desc) 250 { 251 printf ("Partition Start Sector Num Sectors Type\n"); 252 print_partition_extended (dev_desc, 0, 0, 1); 253 } 254 255 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 256 { 257 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 258 } 259 260 261 #endif 262