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 static int test_part_dos(struct blk_desc *dev_desc) 91 { 92 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 93 94 if (dev_desc->block_read(dev_desc, 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(struct blk_desc *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, ext_part_sector, 1, 115 (ulong *)buffer) != 1) { 116 printf ("** Can't read partition table on %d:" LBAFU " **\n", 117 dev_desc->devnum, ext_part_sector); 118 return; 119 } 120 i=test_block_type(buffer); 121 if (i != DOS_MBR) { 122 printf ("bad MBR sector signature 0x%02x%02x\n", 123 buffer[DOS_PART_MAGIC_OFFSET], 124 buffer[DOS_PART_MAGIC_OFFSET + 1]); 125 return; 126 } 127 128 if (!ext_part_sector) 129 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 130 131 /* Print all primary/logical partitions */ 132 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 133 for (i = 0; i < 4; i++, pt++) { 134 /* 135 * fdisk does not show the extended partitions that 136 * are not in the MBR 137 */ 138 139 if ((pt->sys_ind != 0) && 140 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 141 print_one_part(pt, ext_part_sector, part_num, disksig); 142 } 143 144 /* Reverse engr the fdisk part# assignment rule! */ 145 if ((ext_part_sector == 0) || 146 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 147 part_num++; 148 } 149 } 150 151 /* Follows the extended partitions */ 152 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 153 for (i = 0; i < 4; i++, pt++) { 154 if (is_extended (pt->sys_ind)) { 155 lbaint_t lba_start 156 = le32_to_int (pt->start4) + relative; 157 158 print_partition_extended(dev_desc, lba_start, 159 ext_part_sector == 0 ? lba_start : relative, 160 part_num, disksig); 161 } 162 } 163 164 return; 165 } 166 167 168 /* Print a partition that is relative to its Extended partition table 169 */ 170 static int part_get_info_extended(struct blk_desc *dev_desc, 171 lbaint_t ext_part_sector, lbaint_t relative, 172 int part_num, int which_part, 173 disk_partition_t *info, 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, ext_part_sector, 1, 181 (ulong *)buffer) != 1) { 182 printf ("** Can't read partition table on %d:" LBAFU " **\n", 183 dev_desc->devnum, ext_part_sector); 184 return -1; 185 } 186 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 187 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 188 printf ("bad MBR sector signature 0x%02x%02x\n", 189 buffer[DOS_PART_MAGIC_OFFSET], 190 buffer[DOS_PART_MAGIC_OFFSET + 1]); 191 return -1; 192 } 193 194 #ifdef CONFIG_PARTITION_UUIDS 195 if (!ext_part_sector) 196 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 197 #endif 198 199 /* Print all primary/logical partitions */ 200 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 201 for (i = 0; i < 4; i++, pt++) { 202 /* 203 * fdisk does not show the extended partitions that 204 * are not in the MBR 205 */ 206 if (((pt->boot_ind & ~0x80) == 0) && 207 (pt->sys_ind != 0) && 208 (part_num == which_part) && 209 (is_extended(pt->sys_ind) == 0)) { 210 info->blksz = DOS_PART_DEFAULT_SECTOR; 211 info->start = (lbaint_t)(ext_part_sector + 212 le32_to_int(pt->start4)); 213 info->size = (lbaint_t)le32_to_int(pt->size4); 214 switch(dev_desc->if_type) { 215 case IF_TYPE_IDE: 216 case IF_TYPE_SATA: 217 case IF_TYPE_ATAPI: 218 sprintf((char *)info->name, "hd%c%d", 219 'a' + dev_desc->devnum, 220 part_num); 221 break; 222 case IF_TYPE_SCSI: 223 sprintf((char *)info->name, "sd%c%d", 224 'a' + dev_desc->devnum, 225 part_num); 226 break; 227 case IF_TYPE_USB: 228 sprintf((char *)info->name, "usbd%c%d", 229 'a' + dev_desc->devnum, 230 part_num); 231 break; 232 case IF_TYPE_DOC: 233 sprintf((char *)info->name, "docd%c%d", 234 'a' + dev_desc->devnum, 235 part_num); 236 break; 237 default: 238 sprintf((char *)info->name, "xx%c%d", 239 'a' + dev_desc->devnum, 240 part_num); 241 break; 242 } 243 /* sprintf(info->type, "%d, pt->sys_ind); */ 244 strcpy((char *)info->type, "U-Boot"); 245 info->bootable = is_bootable(pt); 246 #ifdef CONFIG_PARTITION_UUIDS 247 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 248 #endif 249 return 0; 250 } 251 252 /* Reverse engr the fdisk part# assignment rule! */ 253 if ((ext_part_sector == 0) || 254 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 255 part_num++; 256 } 257 } 258 259 /* Follows the extended partitions */ 260 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 261 for (i = 0; i < 4; i++, pt++) { 262 if (is_extended (pt->sys_ind)) { 263 lbaint_t lba_start 264 = le32_to_int (pt->start4) + relative; 265 266 return part_get_info_extended(dev_desc, lba_start, 267 ext_part_sector == 0 ? lba_start : relative, 268 part_num, which_part, info, disksig); 269 } 270 } 271 272 /* Check for DOS PBR if no partition is found */ 273 dos_type = test_block_type(buffer); 274 275 if (dos_type == DOS_PBR) { 276 info->start = 0; 277 info->size = dev_desc->lba; 278 info->blksz = DOS_PART_DEFAULT_SECTOR; 279 info->bootable = 0; 280 strcpy((char *)info->type, "U-Boot"); 281 #ifdef CONFIG_PARTITION_UUIDS 282 info->uuid[0] = 0; 283 #endif 284 return 0; 285 } 286 287 return -1; 288 } 289 290 void print_part_dos(struct blk_desc *dev_desc) 291 { 292 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 293 print_partition_extended(dev_desc, 0, 0, 1, 0); 294 } 295 296 int part_get_info_dos(struct blk_desc *dev_desc, int part, 297 disk_partition_t *info) 298 { 299 return part_get_info_extended(dev_desc, 0, 0, 1, part, info, 0); 300 } 301 302 U_BOOT_PART_TYPE(dos) = { 303 .name = "DOS", 304 .part_type = PART_TYPE_DOS, 305 .get_info = part_get_info_ptr(part_get_info_dos), 306 .print = part_print_ptr(print_part_dos), 307 .test = test_part_dos, 308 }; 309 310 #endif 311