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 "part_dos.h" 21 22 #ifdef HAVE_BLOCK_DEVICE 23 24 #define DOS_PART_DEFAULT_SECTOR 512 25 26 /* Convert char[4] in little endian format to the host format integer 27 */ 28 static inline int le32_to_int(unsigned char *le32) 29 { 30 return ((le32[3] << 24) + 31 (le32[2] << 16) + 32 (le32[1] << 8) + 33 le32[0] 34 ); 35 } 36 37 static inline int is_extended(int part_type) 38 { 39 return (part_type == 0x5 || 40 part_type == 0xf || 41 part_type == 0x85); 42 } 43 44 static inline int is_bootable(dos_partition_t *p) 45 { 46 return p->boot_ind == 0x80; 47 } 48 49 static void print_one_part(dos_partition_t *p, int ext_part_sector, 50 int part_num, unsigned int disksig) 51 { 52 int lba_start = ext_part_sector + le32_to_int (p->start4); 53 int lba_size = le32_to_int (p->size4); 54 55 printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n", 56 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind, 57 (is_extended(p->sys_ind) ? " Extd" : ""), 58 (is_bootable(p) ? " Boot" : "")); 59 } 60 61 static int test_block_type(unsigned char *buffer) 62 { 63 int slot; 64 struct dos_partition *p; 65 66 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 67 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 68 return (-1); 69 } /* no DOS Signature at all */ 70 p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET]; 71 for (slot = 0; slot < 3; slot++) { 72 if (p->boot_ind != 0 && p->boot_ind != 0x80) { 73 if (!slot && 74 (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET], 75 "FAT", 3) == 0 || 76 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET], 77 "FAT32", 5) == 0)) { 78 return DOS_PBR; /* is PBR */ 79 } else { 80 return -1; 81 } 82 } 83 } 84 return DOS_MBR; /* Is MBR */ 85 } 86 87 88 int test_part_dos (block_dev_desc_t *dev_desc) 89 { 90 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 91 92 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) 93 return -1; 94 95 if (test_block_type(buffer) != DOS_MBR) 96 return -1; 97 98 return 0; 99 } 100 101 /* Print a partition that is relative to its Extended partition table 102 */ 103 static void print_partition_extended(block_dev_desc_t *dev_desc, 104 int ext_part_sector, int relative, 105 int part_num, unsigned int disksig) 106 { 107 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 108 dos_partition_t *pt; 109 int i; 110 111 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 112 printf ("** Can't read partition table on %d:%d **\n", 113 dev_desc->dev, ext_part_sector); 114 return; 115 } 116 i=test_block_type(buffer); 117 if (i != DOS_MBR) { 118 printf ("bad MBR sector signature 0x%02x%02x\n", 119 buffer[DOS_PART_MAGIC_OFFSET], 120 buffer[DOS_PART_MAGIC_OFFSET + 1]); 121 return; 122 } 123 124 if (!ext_part_sector) 125 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 126 127 /* Print all primary/logical partitions */ 128 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 129 for (i = 0; i < 4; i++, pt++) { 130 /* 131 * fdisk does not show the extended partitions that 132 * are not in the MBR 133 */ 134 135 if ((pt->sys_ind != 0) && 136 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 137 print_one_part(pt, ext_part_sector, part_num, disksig); 138 } 139 140 /* Reverse engr the fdisk part# assignment rule! */ 141 if ((ext_part_sector == 0) || 142 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 143 part_num++; 144 } 145 } 146 147 /* Follows the extended partitions */ 148 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 149 for (i = 0; i < 4; i++, pt++) { 150 if (is_extended (pt->sys_ind)) { 151 int lba_start = le32_to_int (pt->start4) + relative; 152 153 print_partition_extended(dev_desc, lba_start, 154 ext_part_sector == 0 ? lba_start : relative, 155 part_num, disksig); 156 } 157 } 158 159 return; 160 } 161 162 163 /* Print a partition that is relative to its Extended partition table 164 */ 165 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 166 int relative, int part_num, 167 int which_part, disk_partition_t *info, 168 unsigned int disksig) 169 { 170 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 171 dos_partition_t *pt; 172 int i; 173 int dos_type; 174 175 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 176 printf ("** Can't read partition table on %d:%d **\n", 177 dev_desc->dev, ext_part_sector); 178 return -1; 179 } 180 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 181 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 182 printf ("bad MBR sector signature 0x%02x%02x\n", 183 buffer[DOS_PART_MAGIC_OFFSET], 184 buffer[DOS_PART_MAGIC_OFFSET + 1]); 185 return -1; 186 } 187 188 #ifdef CONFIG_PARTITION_UUIDS 189 if (!ext_part_sector) 190 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 191 #endif 192 193 /* Print all primary/logical partitions */ 194 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 195 for (i = 0; i < 4; i++, pt++) { 196 /* 197 * fdisk does not show the extended partitions that 198 * are not in the MBR 199 */ 200 if (((pt->boot_ind & ~0x80) == 0) && 201 (pt->sys_ind != 0) && 202 (part_num == which_part) && 203 (is_extended(pt->sys_ind) == 0)) { 204 info->blksz = DOS_PART_DEFAULT_SECTOR; 205 info->start = (lbaint_t)(ext_part_sector + 206 le32_to_int(pt->start4)); 207 info->size = (lbaint_t)le32_to_int(pt->size4); 208 switch(dev_desc->if_type) { 209 case IF_TYPE_IDE: 210 case IF_TYPE_SATA: 211 case IF_TYPE_ATAPI: 212 sprintf ((char *)info->name, "hd%c%d", 213 'a' + dev_desc->dev, part_num); 214 break; 215 case IF_TYPE_SCSI: 216 sprintf ((char *)info->name, "sd%c%d", 217 'a' + dev_desc->dev, part_num); 218 break; 219 case IF_TYPE_USB: 220 sprintf ((char *)info->name, "usbd%c%d", 221 'a' + dev_desc->dev, part_num); 222 break; 223 case IF_TYPE_DOC: 224 sprintf ((char *)info->name, "docd%c%d", 225 'a' + dev_desc->dev, part_num); 226 break; 227 default: 228 sprintf ((char *)info->name, "xx%c%d", 229 'a' + dev_desc->dev, part_num); 230 break; 231 } 232 /* sprintf(info->type, "%d, pt->sys_ind); */ 233 sprintf ((char *)info->type, "U-Boot"); 234 info->bootable = is_bootable(pt); 235 #ifdef CONFIG_PARTITION_UUIDS 236 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 237 #endif 238 return 0; 239 } 240 241 /* Reverse engr the fdisk part# assignment rule! */ 242 if ((ext_part_sector == 0) || 243 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 244 part_num++; 245 } 246 } 247 248 /* Follows the extended partitions */ 249 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 250 for (i = 0; i < 4; i++, pt++) { 251 if (is_extended (pt->sys_ind)) { 252 int lba_start = le32_to_int (pt->start4) + relative; 253 254 return get_partition_info_extended (dev_desc, lba_start, 255 ext_part_sector == 0 ? lba_start : relative, 256 part_num, which_part, info, disksig); 257 } 258 } 259 260 /* Check for DOS PBR if no partition is found */ 261 dos_type = test_block_type(buffer); 262 263 if (dos_type == DOS_PBR) { 264 info->start = 0; 265 info->size = dev_desc->lba; 266 info->blksz = DOS_PART_DEFAULT_SECTOR; 267 info->bootable = 0; 268 sprintf ((char *)info->type, "U-Boot"); 269 #ifdef CONFIG_PARTITION_UUIDS 270 info->uuid[0] = 0; 271 #endif 272 return 0; 273 } 274 275 return -1; 276 } 277 278 void print_part_dos (block_dev_desc_t *dev_desc) 279 { 280 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 281 print_partition_extended(dev_desc, 0, 0, 1, 0); 282 } 283 284 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 285 { 286 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 287 } 288 289 290 #endif 291