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