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. * See file CREDITS for list of people who contributed to this
  7. * project.
  8. *
  9. * This program is free software; you can redistribute it and/or
  10. * modify it under the terms of the GNU General Public License as
  11. * published by the Free Software Foundation; either version 2 of
  12. * the License, or (at your option) any later version.
  13. *
  14. * This program is distributed in the hope that it will be useful,
  15. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17. * GNU General Public License for more details.
  18. *
  19. * You should have received a copy of the GNU General Public License
  20. * along with this program; if not, write to the Free Software
  21. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22. * MA 02111-1307 USA
  23. */
  24. /*
  25. * Support for harddisk partitions.
  26. *
  27. * To be compatible with LinuxPPC and Apple we use the standard Apple
  28. * SCSI disk partitioning scheme. For more information see:
  29. * http://developer.apple.com/techpubs/mac/Devices/Devices-126.html#MARKER-14-92
  30. */
  31. #include <common.h>
  32. #include <command.h>
  33. #include <ide.h>
  34. #include "part_dos.h"
  35. #ifdef HAVE_BLOCK_DEVICE
  36. /* Convert char[4] in little endian format to the host format integer
  37. */
  38. static inline int le32_to_int(unsigned char *le32)
  39. {
  40. return ((le32[3] << 24) +
  41. (le32[2] << 16) +
  42. (le32[1] << 8) +
  43. le32[0]
  44. );
  45. }
  46. static inline int is_extended(int part_type)
  47. {
  48. return (part_type == 0x5 ||
  49. part_type == 0xf ||
  50. part_type == 0x85);
  51. }
  52. static inline int is_bootable(dos_partition_t *p)
  53. {
  54. return p->boot_ind == 0x80;
  55. }
  56. static void print_one_part(dos_partition_t *p, int ext_part_sector,
  57. int part_num, unsigned int disksig)
  58. {
  59. int lba_start = ext_part_sector + le32_to_int (p->start4);
  60. int lba_size = le32_to_int (p->size4);
  61. printf("%3d\t%-10d\t%-10d\t%08x-%02x\t%02x%s%s\n",
  62. part_num, lba_start, lba_size, disksig, part_num, p->sys_ind,
  63. (is_extended(p->sys_ind) ? " Extd" : ""),
  64. (is_bootable(p) ? " Boot" : ""));
  65. }
  66. static int test_block_type(unsigned char *buffer)
  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. if (strncmp((char *)&buffer[DOS_PBR_FSTYPE_OFFSET],"FAT",3)==0 ||
  73. strncmp((char *)&buffer[DOS_PBR32_FSTYPE_OFFSET],"FAT32",5)==0) {
  74. return DOS_PBR; /* is PBR */
  75. }
  76. return DOS_MBR; /* Is MBR */
  77. }
  78. int test_part_dos (block_dev_desc_t *dev_desc)
  79. {
  80. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
  81. if (dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1)
  82. return -1;
  83. if (test_block_type(buffer) != DOS_MBR)
  84. return -1;
  85. return 0;
  86. }
  87. /* Print a partition that is relative to its Extended partition table
  88. */
  89. static void print_partition_extended(block_dev_desc_t *dev_desc,
  90. int ext_part_sector, int 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->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
  97. printf ("** Can't read partition table on %d:%d **\n",
  98. dev_desc->dev, ext_part_sector);
  99. return;
  100. }
  101. i=test_block_type(buffer);
  102. if (i != DOS_MBR) {
  103. printf ("bad MBR sector signature 0x%02x%02x\n",
  104. buffer[DOS_PART_MAGIC_OFFSET],
  105. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  106. return;
  107. }
  108. if (!ext_part_sector)
  109. disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
  110. /* Print all primary/logical partitions */
  111. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  112. for (i = 0; i < 4; i++, pt++) {
  113. /*
  114. * fdisk does not show the extended partitions that
  115. * are not in the MBR
  116. */
  117. if ((pt->sys_ind != 0) &&
  118. (ext_part_sector == 0 || !is_extended (pt->sys_ind)) ) {
  119. print_one_part(pt, ext_part_sector, part_num, disksig);
  120. }
  121. /* Reverse engr the fdisk part# assignment rule! */
  122. if ((ext_part_sector == 0) ||
  123. (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
  124. part_num++;
  125. }
  126. }
  127. /* Follows the extended partitions */
  128. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  129. for (i = 0; i < 4; i++, pt++) {
  130. if (is_extended (pt->sys_ind)) {
  131. int lba_start = le32_to_int (pt->start4) + relative;
  132. print_partition_extended(dev_desc, lba_start,
  133. ext_part_sector == 0 ? lba_start : relative,
  134. part_num, disksig);
  135. }
  136. }
  137. return;
  138. }
  139. /* Print a partition that is relative to its Extended partition table
  140. */
  141. static int get_partition_info_extended (block_dev_desc_t *dev_desc, int ext_part_sector,
  142. int relative, int part_num,
  143. int which_part, disk_partition_t *info,
  144. unsigned int disksig)
  145. {
  146. ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer, dev_desc->blksz);
  147. dos_partition_t *pt;
  148. int i;
  149. if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
  150. printf ("** Can't read partition table on %d:%d **\n",
  151. dev_desc->dev, ext_part_sector);
  152. return -1;
  153. }
  154. if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
  155. buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
  156. printf ("bad MBR sector signature 0x%02x%02x\n",
  157. buffer[DOS_PART_MAGIC_OFFSET],
  158. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  159. return -1;
  160. }
  161. #ifdef CONFIG_PARTITION_UUIDS
  162. if (!ext_part_sector)
  163. disksig = le32_to_int(&buffer[DOS_PART_DISKSIG_OFFSET]);
  164. #endif
  165. /* Print all primary/logical partitions */
  166. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  167. for (i = 0; i < 4; i++, pt++) {
  168. /*
  169. * fdisk does not show the extended partitions that
  170. * are not in the MBR
  171. */
  172. if (((pt->boot_ind & ~0x80) == 0) &&
  173. (pt->sys_ind != 0) &&
  174. (part_num == which_part) &&
  175. (is_extended(pt->sys_ind) == 0)) {
  176. info->blksz = 512;
  177. info->start = ext_part_sector + le32_to_int (pt->start4);
  178. info->size = le32_to_int (pt->size4);
  179. switch(dev_desc->if_type) {
  180. case IF_TYPE_IDE:
  181. case IF_TYPE_SATA:
  182. case IF_TYPE_ATAPI:
  183. sprintf ((char *)info->name, "hd%c%d",
  184. 'a' + dev_desc->dev, part_num);
  185. break;
  186. case IF_TYPE_SCSI:
  187. sprintf ((char *)info->name, "sd%c%d",
  188. 'a' + dev_desc->dev, part_num);
  189. break;
  190. case IF_TYPE_USB:
  191. sprintf ((char *)info->name, "usbd%c%d",
  192. 'a' + dev_desc->dev, part_num);
  193. break;
  194. case IF_TYPE_DOC:
  195. sprintf ((char *)info->name, "docd%c%d",
  196. 'a' + dev_desc->dev, part_num);
  197. break;
  198. default:
  199. sprintf ((char *)info->name, "xx%c%d",
  200. 'a' + dev_desc->dev, part_num);
  201. break;
  202. }
  203. /* sprintf(info->type, "%d, pt->sys_ind); */
  204. sprintf ((char *)info->type, "U-Boot");
  205. info->bootable = is_bootable(pt);
  206. #ifdef CONFIG_PARTITION_UUIDS
  207. sprintf(info->uuid, "%08x-%02x", disksig, part_num);
  208. #endif
  209. return 0;
  210. }
  211. /* Reverse engr the fdisk part# assignment rule! */
  212. if ((ext_part_sector == 0) ||
  213. (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
  214. part_num++;
  215. }
  216. }
  217. /* Follows the extended partitions */
  218. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  219. for (i = 0; i < 4; i++, pt++) {
  220. if (is_extended (pt->sys_ind)) {
  221. int lba_start = le32_to_int (pt->start4) + relative;
  222. return get_partition_info_extended (dev_desc, lba_start,
  223. ext_part_sector == 0 ? lba_start : relative,
  224. part_num, which_part, info, disksig);
  225. }
  226. }
  227. return -1;
  228. }
  229. void print_part_dos (block_dev_desc_t *dev_desc)
  230. {
  231. printf("Part\tStart Sector\tNum Sectors\tUUID\t\tType\n");
  232. print_partition_extended(dev_desc, 0, 0, 1, 0);
  233. }
  234. int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
  235. {
  236. return get_partition_info_extended(dev_desc, 0, 0, 1, part, info, 0);
  237. }
  238. #endif