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 defined(CONFIG_MMC) || \ 42 defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_DOS_PARTITION) 43 44 /* Convert char[4] in little endian format to the host format integer 45 */ 46 static inline int le32_to_int(unsigned char *le32) 47 { 48 return ((le32[3] << 24) + 49 (le32[2] << 16) + 50 (le32[1] << 8) + 51 le32[0] 52 ); 53 } 54 55 static inline int is_extended(int part_type) 56 { 57 return (part_type == 0x5 || 58 part_type == 0xf || 59 part_type == 0x85); 60 } 61 62 static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num) 63 { 64 int lba_start = ext_part_sector + le32_to_int (p->start4); 65 int lba_size = le32_to_int (p->size4); 66 67 printf ("%5d\t\t%10d\t%10d\t%2x%s\n", 68 part_num, lba_start, lba_size, p->sys_ind, 69 (is_extended (p->sys_ind) ? " Extd" : "")); 70 } 71 72 static int test_block_type(unsigned char *buffer) 73 { 74 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 75 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 76 return (-1); 77 } /* no DOS Signature at all */ 78 if(strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0) 79 return DOS_PBR; /* is PBR */ 80 return DOS_MBR; /* Is MBR */ 81 } 82 83 84 int test_part_dos (block_dev_desc_t *dev_desc) 85 { 86 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 87 88 if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) || 89 (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 90 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 91 return (-1); 92 } 93 return (0); 94 } 95 96 /* Print a partition that is relative to its Extended partition table 97 */ 98 static void print_partition_extended (block_dev_desc_t *dev_desc, int ext_part_sector, int relative, 99 int part_num) 100 { 101 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 102 dos_partition_t *pt; 103 int i; 104 105 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 106 printf ("** Can't read partition table on %d:%d **\n", 107 dev_desc->dev, ext_part_sector); 108 return; 109 } 110 i=test_block_type(buffer); 111 if(i==-1) { 112 printf ("bad MBR sector signature 0x%02x%02x\n", 113 buffer[DOS_PART_MAGIC_OFFSET], 114 buffer[DOS_PART_MAGIC_OFFSET + 1]); 115 return; 116 } 117 if(i==DOS_PBR) { 118 printf (" 1\t\t 0\t%10ld\t%2x\n", 119 dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]); 120 return; 121 } 122 /* Print all primary/logical partitions */ 123 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 124 for (i = 0; i < 4; i++, pt++) { 125 /* 126 * fdisk does not show the extended partitions that 127 * are not in the MBR 128 */ 129 130 if ((pt->sys_ind != 0) && 131 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 132 print_one_part (pt, ext_part_sector, part_num); 133 } 134 135 /* Reverse engr the fdisk part# assignment rule! */ 136 if ((ext_part_sector == 0) || 137 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 138 part_num++; 139 } 140 } 141 142 /* Follows the extended partitions */ 143 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 144 for (i = 0; i < 4; i++, pt++) { 145 if (is_extended (pt->sys_ind)) { 146 int lba_start = le32_to_int (pt->start4) + relative; 147 148 print_partition_extended (dev_desc, lba_start, 149 ext_part_sector == 0 ? lba_start 150 : relative, 151 part_num); 152 } 153 } 154 155 return; 156 } 157 158 159 /* Print a partition that is relative to its Extended partition table 160 */ 161 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 162 int relative, int part_num, 163 int which_part, disk_partition_t *info) 164 { 165 unsigned char buffer[DEFAULT_SECTOR_SIZE]; 166 dos_partition_t *pt; 167 int i; 168 169 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 170 printf ("** Can't read partition table on %d:%d **\n", 171 dev_desc->dev, ext_part_sector); 172 return -1; 173 } 174 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 175 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 176 printf ("bad MBR sector signature 0x%02x%02x\n", 177 buffer[DOS_PART_MAGIC_OFFSET], 178 buffer[DOS_PART_MAGIC_OFFSET + 1]); 179 return -1; 180 } 181 182 /* Print all primary/logical partitions */ 183 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 184 for (i = 0; i < 4; i++, pt++) { 185 /* 186 * fdisk does not show the extended partitions that 187 * are not in the MBR 188 */ 189 if ((pt->sys_ind != 0) && 190 (part_num == which_part) && 191 (is_extended(pt->sys_ind) == 0)) { 192 info->blksz = 512; 193 info->start = ext_part_sector + le32_to_int (pt->start4); 194 info->size = le32_to_int (pt->size4); 195 switch(dev_desc->if_type) { 196 case IF_TYPE_IDE: 197 case IF_TYPE_ATAPI: 198 sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); 199 break; 200 case IF_TYPE_SCSI: 201 sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); 202 break; 203 case IF_TYPE_USB: 204 sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); 205 break; 206 case IF_TYPE_DOC: 207 sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); 208 break; 209 default: 210 sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num); 211 break; 212 } 213 /* sprintf(info->type, "%d, pt->sys_ind); */ 214 sprintf ((char *)info->type, "U-Boot"); 215 return 0; 216 } 217 218 /* Reverse engr the fdisk part# assignment rule! */ 219 if ((ext_part_sector == 0) || 220 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 221 part_num++; 222 } 223 } 224 225 /* Follows the extended partitions */ 226 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 227 for (i = 0; i < 4; i++, pt++) { 228 if (is_extended (pt->sys_ind)) { 229 int lba_start = le32_to_int (pt->start4) + relative; 230 231 return get_partition_info_extended (dev_desc, lba_start, 232 ext_part_sector == 0 ? lba_start : relative, 233 part_num, which_part, info); 234 } 235 } 236 return -1; 237 } 238 239 void print_part_dos (block_dev_desc_t *dev_desc) 240 { 241 printf ("Partition Start Sector Num Sectors Type\n"); 242 print_partition_extended (dev_desc, 0, 0, 1); 243 } 244 245 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 246 { 247 return get_partition_info_extended (dev_desc, 0, 0, 1, part, info); 248 } 249 250 251 #endif /* (CONFIG_COMMANDS & CFG_CMD_IDE) && CONFIG_DOS_PARTITION */ 252