part_dos.c 7.2 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. #if defined(CONFIG_CMD_IDE) || \
  36. defined(CONFIG_CMD_MG_DISK) || \
  37. defined(CONFIG_CMD_SATA) || \
  38. defined(CONFIG_CMD_SCSI) || \
  39. defined(CONFIG_CMD_USB) || \
  40. defined(CONFIG_MMC) || \
  41. defined(CONFIG_SYSTEMACE)
  42. /* Convert char[4] in little endian format to the host format integer
  43. */
  44. static inline int le32_to_int(unsigned char *le32)
  45. {
  46. return ((le32[3] << 24) +
  47. (le32[2] << 16) +
  48. (le32[1] << 8) +
  49. le32[0]
  50. );
  51. }
  52. static inline int is_extended(int part_type)
  53. {
  54. return (part_type == 0x5 ||
  55. part_type == 0xf ||
  56. part_type == 0x85);
  57. }
  58. static void print_one_part (dos_partition_t *p, int ext_part_sector, int part_num)
  59. {
  60. int lba_start = ext_part_sector + le32_to_int (p->start4);
  61. int lba_size = le32_to_int (p->size4);
  62. printf ("%5d\t\t%10d\t%10d\t%2x%s\n",
  63. part_num, lba_start, lba_size, p->sys_ind,
  64. (is_extended (p->sys_ind) ? " Extd" : ""));
  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. return DOS_PBR; /* is PBR */
  74. return DOS_MBR; /* Is MBR */
  75. }
  76. int test_part_dos (block_dev_desc_t *dev_desc)
  77. {
  78. unsigned char buffer[DEFAULT_SECTOR_SIZE];
  79. if ((dev_desc->block_read(dev_desc->dev, 0, 1, (ulong *) buffer) != 1) ||
  80. (buffer[DOS_PART_MAGIC_OFFSET + 0] != 0x55) ||
  81. (buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) ) {
  82. return (-1);
  83. }
  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, int ext_part_sector, int relative,
  89. int part_num)
  90. {
  91. unsigned char buffer[DEFAULT_SECTOR_SIZE];
  92. dos_partition_t *pt;
  93. int i;
  94. if (dev_desc->block_read(dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
  95. printf ("** Can't read partition table on %d:%d **\n",
  96. dev_desc->dev, ext_part_sector);
  97. return;
  98. }
  99. i=test_block_type(buffer);
  100. if(i==-1) {
  101. printf ("bad MBR sector signature 0x%02x%02x\n",
  102. buffer[DOS_PART_MAGIC_OFFSET],
  103. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  104. return;
  105. }
  106. if(i==DOS_PBR) {
  107. printf (" 1\t\t 0\t%10ld\t%2x\n",
  108. dev_desc->lba, buffer[DOS_PBR_MEDIA_TYPE_OFFSET]);
  109. return;
  110. }
  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);
  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. int lba_start = le32_to_int (pt->start4) + relative;
  133. print_partition_extended (dev_desc, lba_start,
  134. ext_part_sector == 0 ? lba_start
  135. : relative,
  136. part_num);
  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, int ext_part_sector,
  144. int relative, int part_num,
  145. int which_part, disk_partition_t *info)
  146. {
  147. unsigned char buffer[DEFAULT_SECTOR_SIZE];
  148. dos_partition_t *pt;
  149. int i;
  150. if (dev_desc->block_read (dev_desc->dev, ext_part_sector, 1, (ulong *) buffer) != 1) {
  151. printf ("** Can't read partition table on %d:%d **\n",
  152. dev_desc->dev, ext_part_sector);
  153. return -1;
  154. }
  155. if (buffer[DOS_PART_MAGIC_OFFSET] != 0x55 ||
  156. buffer[DOS_PART_MAGIC_OFFSET + 1] != 0xaa) {
  157. printf ("bad MBR sector signature 0x%02x%02x\n",
  158. buffer[DOS_PART_MAGIC_OFFSET],
  159. buffer[DOS_PART_MAGIC_OFFSET + 1]);
  160. return -1;
  161. }
  162. /* Print all primary/logical partitions */
  163. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  164. for (i = 0; i < 4; i++, pt++) {
  165. /*
  166. * fdisk does not show the extended partitions that
  167. * are not in the MBR
  168. */
  169. if ((pt->sys_ind != 0) &&
  170. (part_num == which_part) &&
  171. (is_extended(pt->sys_ind) == 0)) {
  172. info->blksz = 512;
  173. info->start = ext_part_sector + le32_to_int (pt->start4);
  174. info->size = le32_to_int (pt->size4);
  175. switch(dev_desc->if_type) {
  176. case IF_TYPE_IDE:
  177. case IF_TYPE_SATA:
  178. case IF_TYPE_ATAPI:
  179. sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
  180. break;
  181. case IF_TYPE_SCSI:
  182. sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
  183. break;
  184. case IF_TYPE_USB:
  185. sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
  186. break;
  187. case IF_TYPE_DOC:
  188. sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
  189. break;
  190. default:
  191. sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
  192. break;
  193. }
  194. /* sprintf(info->type, "%d, pt->sys_ind); */
  195. sprintf ((char *)info->type, "U-Boot");
  196. return 0;
  197. }
  198. /* Reverse engr the fdisk part# assignment rule! */
  199. if ((ext_part_sector == 0) ||
  200. (pt->sys_ind != 0 && !is_extended (pt->sys_ind)) ) {
  201. part_num++;
  202. }
  203. }
  204. /* Follows the extended partitions */
  205. pt = (dos_partition_t *) (buffer + DOS_PART_TBL_OFFSET);
  206. for (i = 0; i < 4; i++, pt++) {
  207. if (is_extended (pt->sys_ind)) {
  208. int lba_start = le32_to_int (pt->start4) + relative;
  209. return get_partition_info_extended (dev_desc, lba_start,
  210. ext_part_sector == 0 ? lba_start : relative,
  211. part_num, which_part, info);
  212. }
  213. }
  214. return -1;
  215. }
  216. void print_part_dos (block_dev_desc_t *dev_desc)
  217. {
  218. printf ("Partition Start Sector Num Sectors Type\n");
  219. print_partition_extended (dev_desc, 0, 0, 1);
  220. }
  221. int get_partition_info_dos (block_dev_desc_t *dev_desc, int part, disk_partition_t * info)
  222. {
  223. return get_partition_info_extended (dev_desc, 0, 0, 1, part, info);
  224. }
  225. #endif