disk/part_iso.c

   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
  24 #include <common.h>
  25 #include <command.h>
  26 #include "part_iso.h"
  27
  28 #if defined(CONFIG_CMD_IDE) || \
  29     defined(CONFIG_CMD_MG_DISK) || \
  30     defined(CONFIG_CMD_SCSI) || \
  31     defined(CONFIG_CMD_SATA) || \
  32     defined(CONFIG_CMD_USB) || \
  33     defined(CONFIG_MMC) || \
  34     defined(CONFIG_SYSTEMACE)
  35
  36 /* #define      ISO_PART_DEBUG */
  37
  38 #ifdef  ISO_PART_DEBUG
  39 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  40 #else
  41 #define PRINTF(fmt,args...)
  42 #endif
  43
  44 /* enable this if CDs are written with the PowerPC Platform ID */
  45 #undef CHECK_FOR_POWERPC_PLATTFORM
  46 #define CD_SECTSIZE 2048
  47
  48 static unsigned char tmpbuf[CD_SECTSIZE];
  49
  50 /* Convert char[4] in little endian format to the host format integer
  51  */
  52 static inline unsigned long le32_to_int(unsigned char *le32)
  53 {
  54     return ((le32[3] << 24) +
  55             (le32[2] << 16) +
  56             (le32[1] << 8) +
  57              le32[0]
  58            );
  59 }
  60 /* Convert char[2] in little endian format to the host format integer
  61  */
  62 static inline unsigned short le16_to_int(unsigned char *le16)
  63 {
  64     return ((le16[1] << 8) +
  65            le16[0]
  66            );
  67 }
  68
  69
  70 /* only boot records will be listed as valid partitions */
  71 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
  72 {
  73         int i,offset,entry_num;
  74         unsigned short *chksumbuf;
  75         unsigned short chksum;
  76         unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
  77         iso_boot_rec_t *pbr = (iso_boot_rec_t   *)tmpbuf; /* boot record */
  78         iso_pri_rec_t *ppr = (iso_pri_rec_t     *)tmpbuf;       /* primary desc */
  79         iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
  80         iso_init_def_entry_t *pide;
  81
  82         /* the first sector (sector 0x10) must be a primary volume desc */
  83         blkaddr=PVD_OFFSET;
  84         if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
  85         return (-1);
  86         if(ppr->desctype!=0x01) {
  87                 if(verb)
  88                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
  89                                 dev_desc->dev, part_num);
  90                 return (-1);
  91         }
  92         if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) {
  93                 if(verb)
  94                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
  95                                 ppr->stand_ident,dev_desc->dev, part_num);
  96                 return (-1);
  97         }
  98         lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
  99                   ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
 100                   ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
 101                   ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
 102         info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
 103         PRINTF(" Lastsect:%08lx\n",lastsect);
 104         for(i=blkaddr;i<lastsect;i++) {
 105                 PRINTF("Reading block %d\n", i);
 106                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
 107                 return (-1);
 108                 if(ppr->desctype==0x00)
 109                         break; /* boot entry found */
 110                 if(ppr->desctype==0xff) {
 111                         if(verb)
 112                                 printf ("** No valid boot catalog found on %d:%d **\n",
 113                                         dev_desc->dev, part_num);
 114                         return (-1);
 115                 }
 116         }
 117         /* boot entry found */
 118         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
 119                 if(verb)
 120                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
 121                                 pbr->ident_str,dev_desc->dev, part_num);
 122                 return (-1);
 123         }
 124         bootaddr=le32_to_int(pbr->pointer);
 125         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
 126         if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
 127                 if(verb)
 128                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
 129                                 bootaddr,dev_desc->dev, part_num);
 130                 return (-1);
 131         }
 132         chksum=0;
 133         chksumbuf = (unsigned short *)tmpbuf;
 134         for(i=0;i<0x10;i++)
 135                 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
 136         if(chksum!=0) {
 137                 if(verb)
 138                         printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
 139                                 dev_desc->dev, part_num);
 140                 return (-1);
 141         }
 142         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
 143                 if(verb)
 144                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
 145                                 dev_desc->dev, part_num);
 146                 return(-1);
 147         }
 148 #ifdef CHECK_FOR_POWERPC_PLATTFORM
 149         if(pve->platform!=0x01) {
 150                 if(verb)
 151                         printf ("** No PowerPC platform CD on %d:%d **\n",
 152                                 dev_desc->dev, part_num);
 153                 return(-1);
 154         }
 155 #endif
 156         /* the validation entry seems to be ok, now search the "partition" */
 157         entry_num=0;
 158         offset=0x20;
 159         sprintf ((char *)info->type, "U-Boot");
 160         switch(dev_desc->if_type) {
 161                 case IF_TYPE_IDE:
 162                 case IF_TYPE_SATA:
 163                 case IF_TYPE_ATAPI:
 164                         sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
 165                         break;
 166                 case IF_TYPE_SCSI:
 167                         sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
 168                         break;
 169                 case IF_TYPE_USB:
 170                         sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
 171                         break;
 172                 case IF_TYPE_DOC:
 173                         sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
 174                         break;
 175                 default:
 176                         sprintf ((char *)info->name, "xx%c%d\n", 'a' + dev_desc->dev, part_num);
 177                         break;
 178         }
 179         /* the bootcatalog (including validation Entry) is limited to 2048Bytes
 180          * (63 boot entries + validation entry) */
 181          while(offset<2048) {
 182                 pide=(iso_init_def_entry_t *)&tmpbuf[offset];
 183                 if ((pide->boot_ind==0x88) ||
 184                     (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
 185                         if(entry_num==part_num) { /* part found */
 186                                 goto found;
 187                         }
 188                         entry_num++; /* count partitions Entries (boot and non bootables */
 189                         offset+=0x20;
 190                         continue;
 191                 }
 192                 if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
 193                     (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
 194                     (pide->boot_ind==0x44)) {   /* Extension Indicator */
 195                         offset+=0x20; /* skip unused entries */
 196                 }
 197                 else {
 198                         if(verb)
 199                                 printf ("** Partition %d not found on device %d **\n",
 200                                         part_num,dev_desc->dev);
 201                         return(-1);
 202                 }
 203         }
 204         /* if we reach this point entire sector has been
 205          * searched w/o succsess */
 206         if(verb)
 207                 printf ("** Partition %d not found on device %d **\n",
 208                         part_num,dev_desc->dev);
 209         return(-1);
 210 found:
 211         if(pide->boot_ind!=0x88) {
 212                 if(verb)
 213                         printf ("** Partition %d is not bootable on device %d **\n",
 214                                 part_num,dev_desc->dev);
 215                 return (-1);
 216         }
 217         switch(pide->boot_media) {
 218                 case 0x00: /* no emulation */
 219                         info->size=le16_to_int(pide->sec_cnt)>>2;
 220                         break;
 221                 case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
 222                 case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
 223                 case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
 224                 case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
 225                 default:        info->size=0; break;
 226         }
 227         newblkaddr=le32_to_int(pide->rel_block_addr);
 228         info->start=newblkaddr;
 229         PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
 230         return 0;
 231 }
 232
 233 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
 234 {
 235         return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
 236 }
 237
 238
 239 void print_part_iso(block_dev_desc_t * dev_desc)
 240 {
 241         disk_partition_t info;
 242         int i;
 243         if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
 244                 printf("** No boot partition found on device %d **\n",dev_desc->dev);
 245                 return;
 246         }
 247         printf("Part   Start     Sect x Size Type\n");
 248         i=0;
 249         do {
 250                 printf (" %2d %8ld %8ld %6ld %.32s\n",
 251                         i, info.start, info.size, info.blksz, info.type);
 252                 i++;
 253         } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
 254 }
 255
 256 int test_part_iso (block_dev_desc_t *dev_desc)
 257 {
 258         disk_partition_t info;
 259
 260         return(get_partition_info_iso_verb(dev_desc,0,&info,0));
 261 }
 262
 263 #endif