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