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 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, int ext_part_sector, 51 int part_num, unsigned int disksig) 52 { 53 int lba_start = ext_part_sector + le32_to_int (p->start4); 54 int lba_size = le32_to_int (p->size4); 55 56 printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n", 57 part_num, lba_start, lba_size, disksig, part_num, p->sys_ind, 58 (is_extended(p->sys_ind) ? " Extd" : ""), 59 (is_bootable(p) ? " Boot" : "")); 60 } 61 62 static int test_block_type(unsigned char *buffer) 63 { 64 int slot; 65 struct dos_partition *p; 66 67 if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) || 68 (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) { 69 return (-1); 70 } /* no DOS Signature at all */ 71 p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET]; 72 for (slot = 0; slot < 3; slot++) { 73 if (p->boot_ind != 0 && p->boot_ind != 0x80) { 74 if (!slot && 75 (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET], 76 "FAT", 3) == 0 || 77 strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET], 78 "FAT32", 5) == 0)) { 79 return DOS_PBR; /* is PBR */ 80 } else { 81 return -1; 82 } 83 } 84 } 85 return DOS_MBR; /* Is MBR */ 86 } 87 88 89 int test_part_dos (block_dev_desc_t *dev_desc) 90 { 91 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 92 93 if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) 94 return -1; 95 96 if (test_block_type(buffer) != DOS_MBR) 97 return -1; 98 99 return 0; 100 } 101 102 /* Print a partition that is relative to its Extended partition table 103 */ 104 static void print_partition_extended(block_dev_desc_t *dev_desc, 105 int ext_part_sector, int relative, 106 int part_num, unsigned int disksig) 107 { 108 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 109 dos_partition_t *pt; 110 int i; 111 112 if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 113 printf ("** Can't read partition table on %d:%d **\n", 114 dev_desc->dev, ext_part_sector); 115 return; 116 } 117 i=test_block_type(buffer); 118 if (i != DOS_MBR) { 119 printf ("bad MBR sector signature 0x%02x%02x\n", 120 buffer[DOS_PART_MAGIC_OFFSET], 121 buffer[DOS_PART_MAGIC_OFFSET + 1]); 122 return; 123 } 124 125 if (!ext_part_sector) 126 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 127 128 /* Print all primary/logical partitions */ 129 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 130 for (i = 0; i < 4; i++, pt++) { 131 /* 132 * fdisk does not show the extended partitions that 133 * are not in the MBR 134 */ 135 136 if ((pt->sys_ind != 0) && 137 (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) { 138 print_one_part(pt, ext_part_sector, part_num, disksig); 139 } 140 141 /* Reverse engr the fdisk part# assignment rule! */ 142 if ((ext_part_sector == 0) || 143 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 144 part_num++; 145 } 146 } 147 148 /* Follows the extended partitions */ 149 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 150 for (i = 0; i < 4; i++, pt++) { 151 if (is_extended (pt->sys_ind)) { 152 int lba_start = le32_to_int (pt->start4) + relative; 153 154 print_partition_extended(dev_desc, lba_start, 155 ext_part_sector == 0 ? lba_start : relative, 156 part_num, disksig); 157 } 158 } 159 160 return; 161 } 162 163 164 /* Print a partition that is relative to its Extended partition table 165 */ 166 static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector, 167 int relative, int part_num, 168 int which_part, disk_partition_t *info, 169 unsigned int disksig) 170 { 171 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz); 172 dos_partition_t *pt; 173 int i; 174 int dos_type; 175 176 if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) { 177 printf ("** Can't read partition table on %d:%d **\n", 178 dev_desc->dev, ext_part_sector); 179 return -1; 180 } 181 if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 || 182 buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) { 183 printf ("bad MBR sector signature 0x%02x%02x\n", 184 buffer[DOS_PART_MAGIC_OFFSET], 185 buffer[DOS_PART_MAGIC_OFFSET + 1]); 186 return -1; 187 } 188 189 #ifdef CONFIG_PARTITION_UUIDS 190 if (!ext_part_sector) 191 disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]); 192 #endif 193 194 /* Print all primary/logical partitions */ 195 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 196 for (i = 0; i < 4; i++, pt++) { 197 /* 198 * fdisk does not show the extended partitions that 199 * are not in the MBR 200 */ 201 if (((pt->boot_ind & ~0x80) == 0) && 202 (pt->sys_ind != 0) && 203 (part_num == which_part) && 204 (is_extended(pt->sys_ind) == 0)) { 205 info->blksz = DOS_PART_DEFAULT_SECTOR; 206 info->start = (lbaint_t)(ext_part_sector + 207 le32_to_int(pt->start4)); 208 info->size = (lbaint_t)le32_to_int(pt->size4); 209 switch(dev_desc->if_type) { 210 case IF_TYPE_IDE: 211 case IF_TYPE_SATA: 212 case IF_TYPE_ATAPI: 213 sprintf ((char *)info->name, "hd%c%d", 214 'a' + dev_desc->dev, part_num); 215 break; 216 case IF_TYPE_SCSI: 217 sprintf ((char *)info->name, "sd%c%d", 218 'a' + dev_desc->dev, part_num); 219 break; 220 case IF_TYPE_USB: 221 sprintf ((char *)info->name, "usbd%c%d", 222 'a' + dev_desc->dev, part_num); 223 break; 224 case IF_TYPE_DOC: 225 sprintf ((char *)info->name, "docd%c%d", 226 'a' + dev_desc->dev, part_num); 227 break; 228 default: 229 sprintf ((char *)info->name, "xx%c%d", 230 'a' + dev_desc->dev, part_num); 231 break; 232 } 233 /* sprintf(info->type, "%d, pt->sys_ind); */ 234 sprintf ((char *)info->type, "U-Boot"); 235 info->bootable = is_bootable(pt); 236 #ifdef CONFIG_PARTITION_UUIDS 237 sprintf(info->uuid, "%08x-%02x", disksig, part_num); 238 #endif 239 return 0; 240 } 241 242 /* Reverse engr the fdisk part# assignment rule! */ 243 if ((ext_part_sector == 0) || 244 (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) { 245 part_num++; 246 } 247 } 248 249 /* Follows the extended partitions */ 250 pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET); 251 for (i = 0; i < 4; i++, pt++) { 252 if (is_extended (pt->sys_ind)) { 253 int lba_start = le32_to_int (pt->start4) + relative; 254 255 return get_partition_info_extended (dev_desc, lba_start, 256 ext_part_sector == 0 ? lba_start : relative, 257 part_num, which_part, info, disksig); 258 } 259 } 260 261 /* Check for DOS PBR if no partition is found */ 262 dos_type = test_block_type(buffer); 263 264 if (dos_type == DOS_PBR) { 265 info->start = 0; 266 info->size = dev_desc->lba; 267 info->blksz = DOS_PART_DEFAULT_SECTOR; 268 info->bootable = 0; 269 sprintf ((char *)info->type, "U-Boot"); 270 #ifdef CONFIG_PARTITION_UUIDS 271 info->uuid[0] = 0; 272 #endif 273 return 0; 274 } 275 276 return -1; 277 } 278 279 void print_part_dos (block_dev_desc_t *dev_desc) 280 { 281 printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n"); 282 print_partition_extended(dev_desc, 0, 0, 1, 0); 283 } 284 285 int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info) 286 { 287 return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0); 288 } 289 290 291 #endif 292