1 /* 2 * (C) Copyright 2001 3 * Raymond Lo, lo@routefree.com 4 * Wolfgang Denk, DENX Software Engineering, wd@denx.de. 5 * 6 * SPDX-License-Identifier: GPL-2.0+ 7 */ 8 9 /* 10 * Support for harddisk partitions. 11 * 12 * To be compatible with LinuxPPC and Apple we use the standard Apple 13 * SCSI disk partitioning scheme. For more information see: 14 * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92 15 */ 16 17 #include <common.h> 18 #include <command.h> 19 #include <ide.h> 20 #include <memalign.h> 21 #include "part_dos.h" 22 23 #ifdef HAVE_BLOCK_DEVICE 24 25 #define DOS_PART_DEFAULT_SECTOR 512 26 27 /* Convert char[4] in little endian format to the host format integer 28 */ 29 static inline unsigned int le32_to_int(unsigned char *le32) 30 { 31 return ((le32[3] << 24) + 32 (le32[2] << 16) + 33 (le32[1] << 8) + 34 le32[0] 35 ); 36 } 37 38 static inline int is_extended(int part_type) 39 { 40 return (part_type == 0x5 || 41 part_type == 0xf || 42 part_type == 0x85); 43 } 44 45 static inline int is_bootable(dos_partition_t *p) 46 { 47 return p->boot_ind == 0x80; 48 } 49 50 static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector, 51 int part_num, unsigned int disksig) 52 { 53 lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4); 54 lbaint_t lba_size = le32_to_int (p->size4); 55 56 printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength 57 "u\t%08x-%02x\t%02x%s%s\n", 58 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind, 59 (is_extended(p->sys_ind) ? " Extd" : ""), 60 (is_bootable(p) ? " Boot" : "")); 61 } 62 63 static int test_block_type(unsigned char *buffer) 64 { 65 int slot; 66 struct dos_partition *p; 67 68 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 69 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 70 return (-1); 71 } /* no DOS Signature at all */ 72 p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET]; 73 for (slot = 0; slot < 3; slot++) { 74 if (p->boot_ind != 0 && p->boot_ind != 0x80) { 75 if (!slot && 76 (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET], 77 "FAT", 3) == 0 || 78 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET], 79 "FAT32", 5) == 0)) { 80 return DOS_PBR; /* is PBR */ 81 } else { 82 return -1; 83 } 84 } 85 } 86 return DOS_MBR; /* Is MBR */ 87 } 88 89 90 int test_part_dos (block_dev_desc_t *dev_desc) 91 { 92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 93 94 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) 95 return -1; 96 97 if (test_block_type(buffer) != DOS_MBR) 98 return -1; 99 100 return 0; 101 } 102 103 /* Print a partition that is relative to its Extended partition table 104 */ 105 static void print_partition_extended(block_dev_desc_t *dev_desc, 106 lbaint_t ext_part_sector, 107 lbaint_t relative, 108 int part_num, unsigned int disksig) 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:" LBAFU " **\n", 116 dev_desc->dev, ext_part_sector); 117 return; 118 } 119 i=test_block_type(buffer); 120 if (i != DOS_MBR) { 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 } 126 127 if (!ext_part_sector) 128 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 129 130 /* Print all primary/logical partitions */ 131 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 132 for (i = 0; i < 4; i++, pt++) { 133 /* 134 * fdisk does not show the extended partitions that 135 * are not in the MBR 136 */ 137 138 if ((pt->sys_ind != 0) && 139 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 140 print_one_part(pt, ext_part_sector, part_num, disksig); 141 } 142 143 /* Reverse engr the fdisk part# assignment rule! */ 144 if ((ext_part_sector == 0) || 145 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 146 part_num++; 147 } 148 } 149 150 /* Follows the extended partitions */ 151 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 152 for (i = 0; i < 4; i++, pt++) { 153 if (is_extended (pt->sys_ind)) { 154 lbaint_t lba_start 155 = le32_to_int (pt->start4) + relative; 156 157 print_partition_extended(dev_desc, lba_start, 158 ext_part_sector == 0 ? lba_start : relative, 159 part_num, disksig); 160 } 161 } 162 163 return; 164 } 165 166 167 /* Print a partition that is relative to its Extended partition table 168 */ 169 static int get_partition_info_extended (block_dev_desc_t *dev_desc, 170 lbaint_t ext_part_sector, 171 lbaint_t relative, int part_num, 172 int which_part, disk_partition_t *info, 173 unsigned int disksig) 174 { 175 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 176 dos_partition_t *pt; 177 int i; 178 int dos_type; 179 180 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 181 printf ("** Can't read partition table on %d:" LBAFU " **\n", 182 dev_desc->dev, ext_part_sector); 183 return -1; 184 } 185 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 186 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 187 printf ("bad MBR sector signature 0x%02x%02x\n", 188 buffer[DOS_PART_MAGIC_OFFSET], 189 buffer[DOS_PART_MAGIC_OFFSET + 1]); 190 return -1; 191 } 192 193 #ifdef CONFIG_PARTITION_UUIDS 194 if (!ext_part_sector) 195 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 196 #endif 197 198 /* Print all primary/logical partitions */ 199 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 200 for (i = 0; i < 4; i++, pt++) { 201 /* 202 * fdisk does not show the extended partitions that 203 * are not in the MBR 204 */ 205 if (((pt->boot_ind & ~0x80) == 0) && 206 (pt->sys_ind != 0) && 207 (part_num == which_part) && 208 (is_extended(pt->sys_ind) == 0)) { 209 info->blksz = DOS_PART_DEFAULT_SECTOR; 210 info->start = (lbaint_t)(ext_part_sector + 211 le32_to_int(pt->start4)); 212 info->size = (lbaint_t)le32_to_int(pt->size4); 213 switch(dev_desc->if_type) { 214 case IF_TYPE_IDE: 215 case IF_TYPE_SATA: 216 case IF_TYPE_ATAPI: 217 sprintf ((char *)info->name, "hd%c%d", 218 'a' + dev_desc->dev, part_num); 219 break; 220 case IF_TYPE_SCSI: 221 sprintf ((char *)info->name, "sd%c%d", 222 'a' + dev_desc->dev, part_num); 223 break; 224 case IF_TYPE_USB: 225 sprintf ((char *)info->name, "usbd%c%d", 226 'a' + dev_desc->dev, part_num); 227 break; 228 case IF_TYPE_DOC: 229 sprintf ((char *)info->name, "docd%c%d", 230 'a' + dev_desc->dev, part_num); 231 break; 232 default: 233 sprintf ((char *)info->name, "xx%c%d", 234 'a' + dev_desc->dev, part_num); 235 break; 236 } 237 /* sprintf(info->type, "%d, pt->sys_ind); */ 238 sprintf ((char *)info->type, "U-Boot"); 239 info->bootable = is_bootable(pt); 240 #ifdef CONFIG_PARTITION_UUIDS 241 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 242 #endif 243 return 0; 244 } 245 246 /* Reverse engr the fdisk part# assignment rule! */ 247 if ((ext_part_sector == 0) || 248 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 249 part_num++; 250 } 251 } 252 253 /* Follows the extended partitions */ 254 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 255 for (i = 0; i < 4; i++, pt++) { 256 if (is_extended (pt->sys_ind)) { 257 lbaint_t lba_start 258 = le32_to_int (pt->start4) + relative; 259 260 return get_partition_info_extended (dev_desc, lba_start, 261 ext_part_sector == 0 ? lba_start : relative, 262 part_num, which_part, info, disksig); 263 } 264 } 265 266 /* Check for DOS PBR if no partition is found */ 267 dos_type = test_block_type(buffer); 268 269 if (dos_type == DOS_PBR) { 270 info->start = 0; 271 info->size = dev_desc->lba; 272 info->blksz = DOS_PART_DEFAULT_SECTOR; 273 info->bootable = 0; 274 sprintf ((char *)info->type, "U-Boot"); 275 #ifdef CONFIG_PARTITION_UUIDS 276 info->uuid[0] = 0; 277 #endif 278 return 0; 279 } 280 281 return -1; 282 } 283 284 void print_part_dos (block_dev_desc_t *dev_desc) 285 { 286 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 287 print_partition_extended(dev_desc, 0, 0, 1, 0); 288 } 289 290 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 291 { 292 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 293 } 294 295 296 #endif 297