part_iso.c 7.8 KB

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  1. /*
  2. * (C) Copyright 2001
  3. * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch.
  4. *
  5. * See file CREDITS for list of people who contributed to this
  6. * project.
  7. *
  8. * This program is free software; you can redistribute it and/or
  9. * modify it under the terms of the GNU General Public License as
  10. * published by the Free Software Foundation; either version 2 of
  11. * the License, or (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21. * MA 02111-1307 USA
  22. */
  23. #include <common.h>
  24. #include <command.h>
  25. #include "part_iso.h"
  26. #if defined(CONFIG_CMD_IDE) || \
  27. defined(CONFIG_CMD_SCSI) || \
  28. defined(CONFIG_CMD_SATA) || \
  29. defined(CONFIG_CMD_USB) || \
  30. defined(CONFIG_MMC) || \
  31. defined(CONFIG_SYSTEMACE)
  32. /* #define ISO_PART_DEBUG */
  33. #ifdef ISO_PART_DEBUG
  34. #define PRINTF(fmt,args...) printf (fmt ,##args)
  35. #else
  36. #define PRINTF(fmt,args...)
  37. #endif
  38. /* enable this if CDs are written with the PowerPC Platform ID */
  39. #undef CHECK_FOR_POWERPC_PLATTFORM
  40. #define CD_SECTSIZE 2048
  41. static unsigned char tmpbuf[CD_SECTSIZE];
  42. /* Convert char[4] in little endian format to the host format integer
  43. */
  44. static inline unsigned long 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. /* Convert char[2] in little endian format to the host format integer
  53. */
  54. static inline unsigned short le16_to_int(unsigned char *le16)
  55. {
  56. return ((le16[1] << 8) +
  57. le16[0]
  58. );
  59. }
  60. /* only boot records will be listed as valid partitions */
  61. int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
  62. {
  63. int i,offset,entry_num;
  64. unsigned short *chksumbuf;
  65. unsigned short chksum;
  66. unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
  67. iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
  68. iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
  69. iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
  70. iso_init_def_entry_t *pide;
  71. /* the first sector (sector 0x10) must be a primary volume desc */
  72. blkaddr=PVD_OFFSET;
  73. if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
  74. return (-1);
  75. if(ppr->desctype!=0x01) {
  76. if(verb)
  77. printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
  78. dev_desc->dev, part_num);
  79. return (-1);
  80. }
  81. if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
  82. if(verb)
  83. printf ("** Wrong ISO Ident: %s on %d:%d **\n",
  84. ppr->stand_ident,dev_desc->dev, part_num);
  85. return (-1);
  86. }
  87. lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
  88. ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
  89. ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
  90. ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
  91. info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
  92. PRINTF(" Lastsect:%08lx\n",lastsect);
  93. for(i=blkaddr;i<lastsect;i++) {
  94. PRINTF("Reading block %d\n", i);
  95. if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
  96. return (-1);
  97. if(ppr->desctype==0x00)
  98. break; /* boot entry found */
  99. if(ppr->desctype==0xff) {
  100. if(verb)
  101. printf ("** No valid boot catalog found on %d:%d **\n",
  102. dev_desc->dev, part_num);
  103. return (-1);
  104. }
  105. }
  106. /* boot entry found */
  107. if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
  108. if(verb)
  109. printf ("** Wrong El Torito ident: %s on %d:%d **\n",
  110. pbr->ident_str,dev_desc->dev, part_num);
  111. return (-1);
  112. }
  113. bootaddr=le32_to_int(pbr->pointer);
  114. PRINTF(" Boot Entry at: %08lX\n",bootaddr);
  115. if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
  116. if(verb)
  117. printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
  118. bootaddr,dev_desc->dev, part_num);
  119. return (-1);
  120. }
  121. chksum=0;
  122. chksumbuf = (unsigned short *)tmpbuf;
  123. for(i=0;i<0x10;i++)
  124. chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
  125. if(chksum!=0) {
  126. if(verb)
  127. printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
  128. dev_desc->dev, part_num);
  129. return (-1);
  130. }
  131. if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
  132. if(verb)
  133. printf ("** Key 0x55 0xAA error on %d:%d **\n",
  134. dev_desc->dev, part_num);
  135. return(-1);
  136. }
  137. #ifdef CHECK_FOR_POWERPC_PLATTFORM
  138. if(pve->platform!=0x01) {
  139. if(verb)
  140. printf ("** No PowerPC platform CD on %d:%d **\n",
  141. dev_desc->dev, part_num);
  142. return(-1);
  143. }
  144. #endif
  145. /* the validation entry seems to be ok, now search the "partition" */
  146. entry_num=0;
  147. offset=0x20;
  148. sprintf ((char *)info->type, "U-Boot");
  149. switch(dev_desc->if_type) {
  150. case IF_TYPE_IDE:
  151. case IF_TYPE_SATA:
  152. case IF_TYPE_ATAPI:
  153. sprintf ((char *)info->name, "hd%c%d",
  154. 'a' + dev_desc->dev, part_num);
  155. break;
  156. case IF_TYPE_SCSI:
  157. sprintf ((char *)info->name, "sd%c%d",
  158. 'a' + dev_desc->dev, part_num);
  159. break;
  160. case IF_TYPE_USB:
  161. sprintf ((char *)info->name, "usbd%c%d",
  162. 'a' + dev_desc->dev, part_num);
  163. break;
  164. case IF_TYPE_DOC:
  165. sprintf ((char *)info->name, "docd%c%d",
  166. 'a' + dev_desc->dev, part_num);
  167. break;
  168. default:
  169. sprintf ((char *)info->name, "xx%c%d",
  170. 'a' + dev_desc->dev, part_num);
  171. break;
  172. }
  173. /* the bootcatalog (including validation Entry) is limited to 2048Bytes
  174. * (63 boot entries + validation entry) */
  175. while(offset<2048) {
  176. pide=(iso_init_def_entry_t *)&tmpbuf[offset];
  177. if ((pide->boot_ind==0x88) ||
  178. (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
  179. if(entry_num==part_num) { /* part found */
  180. goto found;
  181. }
  182. entry_num++; /* count partitions Entries (boot and non bootables */
  183. offset+=0x20;
  184. continue;
  185. }
  186. if ((pide->boot_ind==0x90) || /* Section Header Entry */
  187. (pide->boot_ind==0x91) || /* Section Header Entry (last) */
  188. (pide->boot_ind==0x44)) { /* Extension Indicator */
  189. offset+=0x20; /* skip unused entries */
  190. }
  191. else {
  192. if(verb)
  193. printf ("** Partition %d not found on device %d **\n",
  194. part_num,dev_desc->dev);
  195. return(-1);
  196. }
  197. }
  198. /* if we reach this point entire sector has been
  199. * searched w/o succsess */
  200. if(verb)
  201. printf ("** Partition %d not found on device %d **\n",
  202. part_num,dev_desc->dev);
  203. return(-1);
  204. found:
  205. if(pide->boot_ind!=0x88) {
  206. if(verb)
  207. printf ("** Partition %d is not bootable on device %d **\n",
  208. part_num,dev_desc->dev);
  209. return (-1);
  210. }
  211. switch(pide->boot_media) {
  212. case 0x00: /* no emulation */
  213. info->size=le16_to_int(pide->sec_cnt)>>2;
  214. break;
  215. case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
  216. case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
  217. case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
  218. case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
  219. default: info->size=0; break;
  220. }
  221. newblkaddr=le32_to_int(pide->rel_block_addr);
  222. info->start=newblkaddr;
  223. PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
  224. return 0;
  225. }
  226. int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
  227. {
  228. return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
  229. }
  230. void print_part_iso(block_dev_desc_t * dev_desc)
  231. {
  232. disk_partition_t info;
  233. int i;
  234. if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
  235. printf("** No boot partition found on device %d **\n",dev_desc->dev);
  236. return;
  237. }
  238. printf("Part Start Sect x Size Type\n");
  239. i=0;
  240. do {
  241. printf (" %2d %8ld %8ld %6ld %.32s\n",
  242. i, info.start, info.size, info.blksz, info.type);
  243. i++;
  244. } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
  245. }
  246. int test_part_iso (block_dev_desc_t *dev_desc)
  247. {
  248. disk_partition_t info;
  249. return(get_partition_info_iso_verb(dev_desc,0,&info,0));
  250. }
  251. #endif