part_dos.c 7.6 KB

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  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. * Support for harddisk partitions.
  10. *
  11. * To be compatible with LinuxPPC and Apple we use the standard Apple
  12. * SCSI disk partitioning scheme. For more information see:
  13. * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
  14. */
  15. #include <common.h>
  16. #include <command.h>
  17. #include <ide.h>
  18. #include <memalign.h>
  19. #include "part_dos.h"
  20. #ifdef HAVE_BLOCK_DEVICE
  21. #define DOS_PART_DEFAULT_SECTOR 512
  22. /* Convert char[4] in little endian format to the host format integer
  23. */
  24. static inline unsigned int le32_to_int(unsigned char *le32)
  25. {
  26. return ((le32[3] << 24) +
  27. (le32[2] << 16) +
  28. (le32[1] << 8) +
  29. le32[0]
  30. );
  31. }
  32. static inline int is_extended(int part_type)
  33. {
  34. return (part_type == 0x5 ||
  35. part_type == 0xf ||
  36. part_type == 0x85);
  37. }
  38. static inline int is_bootable(dos_partition_t *p)
  39. {
  40. return p->boot_ind == 0x80;
  41. }
  42. static void print_one_part(dos_partition_t *p, lbaint_t ext_part_sector,
  43. int part_num, unsigned int disksig)
  44. {
  45. lbaint_t lba_start = ext_part_sector + le32_to_int (p->start4);
  46. lbaint_t lba_size = le32_to_int (p->size4);
  47. printf("%3d\t%-10" LBAFlength "u\t%-10" LBAFlength
  48. "u\t%08x-%02x\t%02x%s%s\n",
  49. part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
  50. (is_extended(p->sys_ind) ? " Extd" : ""),
  51. (is_bootable(p) ? " Boot" : ""));
  52. }
  53. static int test_block_type(unsigned char *buffer)
  54. {
  55. int slot;
  56. struct dos_partition *p;
  57. if((buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
  58. (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
  59. return (-1);
  60. } /* no DOS Signature at all */
  61. p = (struct dos_partition *)&buffer[DOS_PART_TBL_OFFSET];
  62. for (slot = 0; slot < 3; slot++) {
  63. if (p->boot_ind != 0 && p->boot_ind != 0x80) {
  64. if (!slot &&
  65. (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],
  66. "FAT", 3) == 0 ||
  67. strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],
  68. "FAT32", 5) == 0)) {
  69. return DOS_PBR; /* is PBR */
  70. } else {
  71. return -1;
  72. }
  73. }
  74. }
  75. return DOS_MBR; /* Is MBR */
  76. }
  77. int test_part_dos (block_dev_desc_t *dev_desc)
  78. {
  79. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
  80. if (dev_desc->block_read(dev_desc, 0, 1, (ulong *)buffer) != 1)
  81. return -1;
  82. if (test_block_type(buffer) != DOS_MBR)
  83. return -1;
  84. return 0;
  85. }
  86. /* Print a partition that is relative to its Extended partition table
  87. */
  88. static void print_partition_extended(block_dev_desc_t *dev_desc,
  89. lbaint_t ext_part_sector,
  90. lbaint_t relative,
  91. int part_num, unsigned int disksig)
  92. {
  93. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
  94. dos_partition_t *pt;
  95. int i;
  96. if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
  97. (ulong *)buffer) != 1) {
  98. printf ("** Can't read partition table on %d:" LBAFU " **\n",
  99. dev_desc->dev, ext_part_sector);
  100. return;
  101. }
  102. i=test_block_type(buffer);
  103. if (i != DOS_MBR) {
  104. printf ("bad MBR sector signature 0x%02x%02x\n",
  105. buffer[DOS_PART_MAGIC_OFFSET],
  106. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  107. return;
  108. }
  109. if (!ext_part_sector)
  110. disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
  111. /* Print all primary/logical partitions */
  112. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  113. for (i = 0; i < 4; i++, pt++) {
  114. /*
  115. * fdisk does not show the extended partitions that
  116. * are not in the MBR
  117. */
  118. if ((pt->sys_ind != 0) &&
  119. (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
  120. print_one_part(pt, ext_part_sector, part_num, disksig);
  121. }
  122. /* Reverse engr the fdisk part# assignment rule! */
  123. if ((ext_part_sector == 0) ||
  124. (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
  125. part_num++;
  126. }
  127. }
  128. /* Follows the extended partitions */
  129. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  130. for (i = 0; i < 4; i++, pt++) {
  131. if (is_extended (pt->sys_ind)) {
  132. lbaint_t lba_start
  133. = le32_to_int (pt->start4) + relative;
  134. print_partition_extended(dev_desc, lba_start,
  135. ext_part_sector == 0 ? lba_start : relative,
  136. part_num, disksig);
  137. }
  138. }
  139. return;
  140. }
  141. /* Print a partition that is relative to its Extended partition table
  142. */
  143. static int get_partition_info_extended (block_dev_desc_t *dev_desc,
  144. lbaint_t ext_part_sector,
  145. lbaint_t relative, int part_num,
  146. int which_part, disk_partition_t *info,
  147. unsigned int disksig)
  148. {
  149. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
  150. dos_partition_t *pt;
  151. int i;
  152. int dos_type;
  153. if (dev_desc->block_read(dev_desc, ext_part_sector, 1,
  154. (ulong *)buffer) != 1) {
  155. printf ("** Can't read partition table on %d:" LBAFU " **\n",
  156. dev_desc->dev, ext_part_sector);
  157. return -1;
  158. }
  159. if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
  160. buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
  161. printf ("bad MBR sector signature 0x%02x%02x\n",
  162. buffer[DOS_PART_MAGIC_OFFSET],
  163. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  164. return -1;
  165. }
  166. #ifdef CONFIG_PARTITION_UUIDS
  167. if (!ext_part_sector)
  168. disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
  169. #endif
  170. /* Print all primary/logical partitions */
  171. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  172. for (i = 0; i < 4; i++, pt++) {
  173. /*
  174. * fdisk does not show the extended partitions that
  175. * are not in the MBR
  176. */
  177. if (((pt->boot_ind & ~0x80) == 0) &&
  178. (pt->sys_ind != 0) &&
  179. (part_num == which_part) &&
  180. (is_extended(pt->sys_ind) == 0)) {
  181. info->blksz = DOS_PART_DEFAULT_SECTOR;
  182. info->start = (lbaint_t)(ext_part_sector +
  183. le32_to_int(pt->start4));
  184. info->size = (lbaint_t)le32_to_int(pt->size4);
  185. switch(dev_desc->if_type) {
  186. case IF_TYPE_IDE:
  187. case IF_TYPE_SATA:
  188. case IF_TYPE_ATAPI:
  189. sprintf ((char *)info->name, "hd%c%d",
  190. 'a' + dev_desc->dev, part_num);
  191. break;
  192. case IF_TYPE_SCSI:
  193. sprintf ((char *)info->name, "sd%c%d",
  194. 'a' + dev_desc->dev, part_num);
  195. break;
  196. case IF_TYPE_USB:
  197. sprintf ((char *)info->name, "usbd%c%d",
  198. 'a' + dev_desc->dev, part_num);
  199. break;
  200. case IF_TYPE_DOC:
  201. sprintf ((char *)info->name, "docd%c%d",
  202. 'a' + dev_desc->dev, part_num);
  203. break;
  204. default:
  205. sprintf ((char *)info->name, "xx%c%d",
  206. 'a' + dev_desc->dev, part_num);
  207. break;
  208. }
  209. /* sprintf(info->type, "%d, pt->sys_ind); */
  210. strcpy((char *)info->type, "U-Boot");
  211. info->bootable = is_bootable(pt);
  212. #ifdef CONFIG_PARTITION_UUIDS
  213. sprintf(info->uuid, "%08x-%02x", disksig, part_num);
  214. #endif
  215. return 0;
  216. }
  217. /* Reverse engr the fdisk part# assignment rule! */
  218. if ((ext_part_sector == 0) ||
  219. (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
  220. part_num++;
  221. }
  222. }
  223. /* Follows the extended partitions */
  224. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  225. for (i = 0; i < 4; i++, pt++) {
  226. if (is_extended (pt->sys_ind)) {
  227. lbaint_t lba_start
  228. = le32_to_int (pt->start4) + relative;
  229. return get_partition_info_extended (dev_desc, lba_start,
  230. ext_part_sector == 0 ? lba_start : relative,
  231. part_num, which_part, info, disksig);
  232. }
  233. }
  234. /* Check for DOS PBR if no partition is found */
  235. dos_type = test_block_type(buffer);
  236. if (dos_type == DOS_PBR) {
  237. info->start = 0;
  238. info->size = dev_desc->lba;
  239. info->blksz = DOS_PART_DEFAULT_SECTOR;
  240. info->bootable = 0;
  241. strcpy((char *)info->type, "U-Boot");
  242. #ifdef CONFIG_PARTITION_UUIDS
  243. info->uuid[0] = 0;
  244. #endif
  245. return 0;
  246. }
  247. return -1;
  248. }
  249. void print_part_dos (block_dev_desc_t *dev_desc)
  250. {
  251. printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
  252. print_partition_extended(dev_desc, 0, 0, 1, 0);
  253. }
  254. int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
  255. {
  256. return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
  257. }
  258. #endif