part_iso.c 7.7 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. #ifdef HAVE_BLOCK_DEVICE
  27. /* #define ISO_PART_DEBUG */
  28. #ifdef ISO_PART_DEBUG
  29. #define PRINTF(fmt,args...) printf (fmt ,##args)
  30. #else
  31. #define PRINTF(fmt,args...)
  32. #endif
  33. /* enable this if CDs are written with the PowerPC Platform ID */
  34. #undef CHECK_FOR_POWERPC_PLATTFORM
  35. #define CD_SECTSIZE 2048
  36. static unsigned char tmpbuf[CD_SECTSIZE];
  37. /* Convert char[4] in little endian format to the host format integer
  38. */
  39. static inline unsigned long le32_to_int(unsigned char *le32)
  40. {
  41. return ((le32[3] << 24) +
  42. (le32[2] << 16) +
  43. (le32[1] << 8) +
  44. le32[0]
  45. );
  46. }
  47. /* Convert char[2] in little endian format to the host format integer
  48. */
  49. static inline unsigned short le16_to_int(unsigned char *le16)
  50. {
  51. return ((le16[1] << 8) +
  52. le16[0]
  53. );
  54. }
  55. /* only boot records will be listed as valid partitions */
  56. int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
  57. {
  58. int i,offset,entry_num;
  59. unsigned short *chksumbuf;
  60. unsigned short chksum;
  61. unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
  62. iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */
  63. iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */
  64. iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
  65. iso_init_def_entry_t *pide;
  66. if (dev_desc->blksz != CD_SECTSIZE)
  67. return -1;
  68. /* the first sector (sector 0x10) must be a primary volume desc */
  69. blkaddr=PVD_OFFSET;
  70. if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
  71. return (-1);
  72. if(ppr->desctype!=0x01) {
  73. if(verb)
  74. printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
  75. dev_desc->dev, part_num);
  76. return (-1);
  77. }
  78. if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
  79. if(verb)
  80. printf ("** Wrong ISO Ident: %s on %d:%d **\n",
  81. ppr->stand_ident,dev_desc->dev, part_num);
  82. return (-1);
  83. }
  84. lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
  85. ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
  86. ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
  87. ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
  88. info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
  89. PRINTF(" Lastsect:%08lx\n",lastsect);
  90. for(i=blkaddr;i<lastsect;i++) {
  91. PRINTF("Reading block %d\n", i);
  92. if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
  93. return (-1);
  94. if(ppr->desctype==0x00)
  95. break; /* boot entry found */
  96. if(ppr->desctype==0xff) {
  97. if(verb)
  98. printf ("** No valid boot catalog found on %d:%d **\n",
  99. dev_desc->dev, part_num);
  100. return (-1);
  101. }
  102. }
  103. /* boot entry found */
  104. if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
  105. if(verb)
  106. printf ("** Wrong El Torito ident: %s on %d:%d **\n",
  107. pbr->ident_str,dev_desc->dev, part_num);
  108. return (-1);
  109. }
  110. bootaddr=le32_to_int(pbr->pointer);
  111. PRINTF(" Boot Entry at: %08lX\n",bootaddr);
  112. if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
  113. if(verb)
  114. printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
  115. bootaddr,dev_desc->dev, part_num);
  116. return (-1);
  117. }
  118. chksum=0;
  119. chksumbuf = (unsigned short *)tmpbuf;
  120. for(i=0;i<0x10;i++)
  121. chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
  122. if(chksum!=0) {
  123. if(verb)
  124. printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
  125. dev_desc->dev, part_num);
  126. return (-1);
  127. }
  128. if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
  129. if(verb)
  130. printf ("** Key 0x55 0xAA error on %d:%d **\n",
  131. dev_desc->dev, part_num);
  132. return(-1);
  133. }
  134. #ifdef CHECK_FOR_POWERPC_PLATTFORM
  135. if(pve->platform!=0x01) {
  136. if(verb)
  137. printf ("** No PowerPC platform CD on %d:%d **\n",
  138. dev_desc->dev, part_num);
  139. return(-1);
  140. }
  141. #endif
  142. /* the validation entry seems to be ok, now search the "partition" */
  143. entry_num=0;
  144. offset=0x20;
  145. sprintf ((char *)info->type, "U-Boot");
  146. switch(dev_desc->if_type) {
  147. case IF_TYPE_IDE:
  148. case IF_TYPE_SATA:
  149. case IF_TYPE_ATAPI:
  150. sprintf ((char *)info->name, "hd%c%d",
  151. 'a' + dev_desc->dev, part_num);
  152. break;
  153. case IF_TYPE_SCSI:
  154. sprintf ((char *)info->name, "sd%c%d",
  155. 'a' + dev_desc->dev, part_num);
  156. break;
  157. case IF_TYPE_USB:
  158. sprintf ((char *)info->name, "usbd%c%d",
  159. 'a' + dev_desc->dev, part_num);
  160. break;
  161. case IF_TYPE_DOC:
  162. sprintf ((char *)info->name, "docd%c%d",
  163. 'a' + dev_desc->dev, part_num);
  164. break;
  165. default:
  166. sprintf ((char *)info->name, "xx%c%d",
  167. 'a' + dev_desc->dev, part_num);
  168. break;
  169. }
  170. /* the bootcatalog (including validation Entry) is limited to 2048Bytes
  171. * (63 boot entries + validation entry) */
  172. while(offset<2048) {
  173. pide=(iso_init_def_entry_t *)&tmpbuf[offset];
  174. if ((pide->boot_ind==0x88) ||
  175. (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
  176. if(entry_num==part_num) { /* part found */
  177. goto found;
  178. }
  179. entry_num++; /* count partitions Entries (boot and non bootables */
  180. offset+=0x20;
  181. continue;
  182. }
  183. if ((pide->boot_ind==0x90) || /* Section Header Entry */
  184. (pide->boot_ind==0x91) || /* Section Header Entry (last) */
  185. (pide->boot_ind==0x44)) { /* Extension Indicator */
  186. offset+=0x20; /* skip unused entries */
  187. }
  188. else {
  189. if(verb)
  190. printf ("** Partition %d not found on device %d **\n",
  191. part_num,dev_desc->dev);
  192. return(-1);
  193. }
  194. }
  195. /* if we reach this point entire sector has been
  196. * searched w/o succsess */
  197. if(verb)
  198. printf ("** Partition %d not found on device %d **\n",
  199. part_num,dev_desc->dev);
  200. return(-1);
  201. found:
  202. if(pide->boot_ind!=0x88) {
  203. if(verb)
  204. printf ("** Partition %d is not bootable on device %d **\n",
  205. part_num,dev_desc->dev);
  206. return (-1);
  207. }
  208. switch(pide->boot_media) {
  209. case 0x00: /* no emulation */
  210. info->size=le16_to_int(pide->sec_cnt)>>2;
  211. break;
  212. case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */
  213. case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */
  214. case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */
  215. case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */
  216. default: info->size=0; break;
  217. }
  218. newblkaddr=le32_to_int(pide->rel_block_addr);
  219. info->start=newblkaddr;
  220. PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
  221. return 0;
  222. }
  223. int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
  224. {
  225. return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
  226. }
  227. void print_part_iso(block_dev_desc_t * dev_desc)
  228. {
  229. disk_partition_t info;
  230. int i;
  231. if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
  232. printf("** No boot partition found on device %d **\n",dev_desc->dev);
  233. return;
  234. }
  235. printf("Part Start Sect x Size Type\n");
  236. i=0;
  237. do {
  238. printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n",
  239. i, info.start, info.size, info.blksz, info.type);
  240. i++;
  241. } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
  242. }
  243. int test_part_iso (block_dev_desc_t *dev_desc)
  244. {
  245. disk_partition_t info;
  246. return(get_partition_info_iso_verb(dev_desc,0,&info,0));
  247. }
  248. #endif