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