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 ((CONFIG_COMMANDS & CFG_CMD_IDE) || \ 39 (CONFIG_COMMANDS & CFG_CMD_SCSI) || \ 40 (CONFIG_COMMANDS & CFG_CMD_USB) || \ 41 (CONFIG_SYSTEMACE)) && defined(CONFIG_DOS_PARTITION) 42 43 /* Convert char[4] in little endian format to the host format integer 44 */ 45 static inline int le32_to_int(unsigned char *le32) 46 { 47 return ((le32[3] << 24) + 48 (le32[2] << 16) + 49 (le32[1] << 8) + 50 le32[0] 51 ); 52 } 53 54 static inline int is_extended(int part_type) 55 { 56 return (part_type == 0x5 || 57 part_type == 0xf || 58 part_type == 0x85); 59 } 60 61 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) 62 { 63 int lba_start = ext_part_sector + le32_to_int (p->start4); 64 int lba_size = le32_to_int (p->size4); 65 66 printf ("%5d\t\t%10d\t%10d\t%2x%s\n", 67 part_num, lba_start, lba_size, p->sys_ind, 68 (is_extended (p->sys_ind) ? " Extd" : "")); 69 } 70 71 static int test_block_type(unsigned char *buffer) 72 { 73 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 74 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 75 return (-1); 76 } /* no DOS Signature at all */ 77 if(strncmp(&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0) 78 return DOS_PBR; /* is PBR */ 79 return DOS_MBR; /* Is MBR */ 80 } 81 82 83 int test_part_dos (block_dev_desc_t *dev_desc) 84 { 85 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 86 87 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || 88 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 89 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 90 return (-1); 91 } 92 return (0); 93 } 94 95 /* Print a partition that is relative to its Extended partition table 96 */ 97 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 98 int part_num) 99 { 100 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 101 dos_partition_t *pt; 102 int i; 103 104 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 105 printf ("** Can't read partition table on %d:%d **\n", 106 dev_desc->dev, ext_part_sector); 107 return; 108 } 109 i=test_block_type(buffer); 110 if(i==-1) { 111 printf ("bad MBR sector signature 0x%02x%02x\n", 112 buffer[DOS_PART_MAGIC_OFFSET], 113 buffer[DOS_PART_MAGIC_OFFSET + 1]); 114 return; 115 } 116 if(i==DOS_PBR) { 117 printf (" 1\t\t 0\t%10ld\t%2x\n", 118 dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); 119 return; 120 } 121 /* Print all primary/logical partitions */ 122 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 123 for (i = 0; i < 4; i++, pt++) { 124 /* 125 * fdisk does not show the extended partitions that 126 * are not in the MBR 127 */ 128 129 if ((pt->sys_ind != 0) && 130 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 131 print_one_part (pt, ext_part_sector, part_num); 132 } 133 134 /* Reverse engr the fdisk part# assignment rule! */ 135 if ((ext_part_sector == 0) || 136 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 137 part_num++; 138 } 139 } 140 141 /* Follows the extended partitions */ 142 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 143 for (i = 0; i < 4; i++, pt++) { 144 if (is_extended (pt->sys_ind)) { 145 int lba_start = le32_to_int (pt->start4) + relative; 146 147 print_partition_extended (dev_desc, lba_start, 148 ext_part_sector == 0 ? lba_start 149 : relative, 150 part_num); 151 } 152 } 153 154 return; 155 } 156 157 158 /* Print a partition that is relative to its Extended partition table 159 */ 160 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 161 int relative, int part_num, 162 int which_part, disk_partition_t *info) 163 { 164 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 165 dos_partition_t *pt; 166 int i; 167 168 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 169 printf ("** Can't read partition table on %d:%d **\n", 170 dev_desc->dev, ext_part_sector); 171 return -1; 172 } 173 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 174 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 175 printf ("bad MBR sector signature 0x%02x%02x\n", 176 buffer[DOS_PART_MAGIC_OFFSET], 177 buffer[DOS_PART_MAGIC_OFFSET + 1]); 178 return -1; 179 } 180 181 /* Print all primary/logical partitions */ 182 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 183 for (i = 0; i < 4; i++, pt++) { 184 /* 185 * fdisk does not show the extended partitions that 186 * are not in the MBR 187 */ 188 if ((pt->sys_ind != 0) && 189 (part_num == which_part) && 190 (is_extended(pt->sys_ind) == 0)) { 191 info->blksz = 512; 192 info->start = ext_part_sector + le32_to_int (pt->start4); 193 info->size = le32_to_int (pt->size4); 194 switch(dev_desc->if_type) { 195 case IF_TYPE_IDE: 196 case IF_TYPE_ATAPI: 197 sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); 198 break; 199 case IF_TYPE_SCSI: 200 sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); 201 break; 202 case IF_TYPE_USB: 203 sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); 204 break; 205 case IF_TYPE_DOC: 206 sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); 207 break; 208 default: 209 sprintf (info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num); 210 break; 211 } 212 /* sprintf(info->type, "%d, pt->sys_ind); */ 213 sprintf (info->type, "U-Boot"); 214 return 0; 215 } 216 217 /* Reverse engr the fdisk part# assignment rule! */ 218 if ((ext_part_sector == 0) || 219 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 220 part_num++; 221 } 222 } 223 224 /* Follows the extended partitions */ 225 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 226 for (i = 0; i < 4; i++, pt++) { 227 if (is_extended (pt->sys_ind)) { 228 int lba_start = le32_to_int (pt->start4) + relative; 229 230 return get_partition_info_extended (dev_desc, lba_start, 231 ext_part_sector == 0 ? lba_start : relative, 232 part_num, which_part, info); 233 } 234 } 235 return -1; 236 } 237 238 void print_part_dos (block_dev_desc_t *dev_desc) 239 { 240 printf ("Partition Start Sector Num Sectors Type\n"); 241 print_partition_extended (dev_desc, 0, 0, 1); 242 } 243 244 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 245 { 246 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 247 } 248 249 250 #endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */ 251