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 <cmd_disk.h>
  27 #include "part_iso.h"
  28
  29 #if ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_ISO_PARTITION)
  30
  31 #undef  ISO_PART_DEBUG
  32
  33 #ifdef  ISO_PART_DEBUG
  34 #define PRINTF(fmt,args...)     printf (fmt ,##args)
  35 #else
  36 #define PRINTF(fmt,args...)
  37 #endif
  38
  39 /* enable this if CDs are written with the PowerPC Platform ID */
  40 #undef CHECK_FOR_POWERPC_PLATTFORM
  41 #define CD_SECTSIZE 2048
  42
  43 static unsigned char tmpbuf[CD_SECTSIZE];
  44
  45 /* Convert char[4] in little endian format to the host format integer
  46  */
  47 static inline unsigned long le32_to_int(unsigned char *le32)
  48 {
  49     return ((le32[3] << 24) +
  50             (le32[2] << 16) +
  51             (le32[1] << 8) +
  52              le32[0]
  53            );
  54 }
  55 /* Convert char[2] in little endian format to the host format integer
  56  */
  57 static inline unsigned short le16_to_int(unsigned char *le16)
  58 {
  59     return ((le16[1] << 8) +
  60            le16[0]
  61            );
  62 }
  63
  64
  65 /* only boot records will be listed as valid partitions */
  66 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb)
  67 {
  68         int i,offset,entry_num;
  69         unsigned short *chksumbuf;
  70         unsigned short chksum;
  71         unsigned long newblkaddr,blkaddr,lastsect,bootaddr;
  72         iso_boot_rec_t *pbr = (iso_boot_rec_t   *)tmpbuf; /* boot record */
  73         iso_pri_rec_t *ppr = (iso_pri_rec_t     *)tmpbuf;       /* primary desc */
  74         iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf;
  75         iso_init_def_entry_t *pide;
  76
  77         /* the first sector (sector 0x10) must be a primary volume desc */
  78         blkaddr=PVD_OFFSET;
  79         if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1)
  80         return (-1);
  81         if(ppr->desctype!=0x01) {
  82                 if(verb)
  83                         printf ("** First descriptor is NOT a primary desc on %d:%d **\n",
  84                                 dev_desc->dev, part_num);
  85                 return (-1);
  86         }
  87         if(strncmp(ppr->stand_ident,"CD001",5)!=0) {
  88                 if(verb)
  89                         printf ("** Wrong ISO Ident: %s on %d:%d **\n",
  90                                 ppr->stand_ident,dev_desc->dev, part_num);
  91                 return (-1);
  92         }
  93         lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) +
  94                   ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) +
  95                   ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) +
  96                   ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ;
  97         info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */
  98         PRINTF(" Lastsect:%08lx\n",lastsect);
  99         for(i=blkaddr;i<lastsect;i++) {
 100                 PRINTF("Reading block %d\n", i);
 101                 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1)
 102                 return (-1);
 103                 if(ppr->desctype==0x00)
 104                         break; /* boot entry found */
 105                 if(ppr->desctype==0xff) {
 106                         if(verb)
 107                                 printf ("** No valid boot catalog found on %d:%d **\n",
 108                                         dev_desc->dev, part_num);
 109                         return (-1);
 110                 }
 111         }
 112         /* boot entry found */
 113         if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) {
 114                 if(verb)
 115                         printf ("** Wrong El Torito ident: %s on %d:%d **\n",
 116                                 pbr->ident_str,dev_desc->dev, part_num);
 117                 return (-1);
 118         }
 119         bootaddr=le32_to_int(pbr->pointer);
 120         PRINTF(" Boot Entry at: %08lX\n",bootaddr);
 121         if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) {
 122                 if(verb)
 123                         printf ("** Can't read Boot Entry at %lX on %d:%d **\n",
 124                                 bootaddr,dev_desc->dev, part_num);
 125                 return (-1);
 126         }
 127         chksum=0;
 128         chksumbuf = (unsigned short *)tmpbuf;
 129         for(i=0;i<0x10;i++)
 130                 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8);
 131         if(chksum!=0) {
 132                 if(verb)
 133                         printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n",
 134                                 dev_desc->dev, part_num);
 135                 return (-1);
 136         }
 137         if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) {
 138                 if(verb)
 139                         printf ("** Key 0x55 0xAA error on %d:%d **\n",
 140                                 dev_desc->dev, part_num);
 141                 return(-1);
 142         }
 143 #ifdef CHECK_FOR_POWERPC_PLATTFORM
 144         if(pve->platform!=0x01) {
 145                 if(verb)
 146                         printf ("** No PowerPC platform CD on %d:%d **\n",
 147                                 dev_desc->dev, part_num);
 148                 return(-1);
 149         }
 150 #endif
 151         /* the validation entry seems to be ok, now search the "partition" */
 152         entry_num=0;
 153         offset=0x20;
 154         sprintf (info->type, "U-Boot");
 155         switch(dev_desc->if_type) {
 156                 case IF_TYPE_IDE:
 157                 case IF_TYPE_ATAPI:
 158                         sprintf (info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num);
 159                         break;
 160                 case IF_TYPE_SCSI:
 161                         sprintf (info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num);
 162                         break;
 163                 case IF_TYPE_USB:
 164                         sprintf (info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num);
 165                         break;
 166                 case IF_TYPE_DOC:
 167                         sprintf (info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num);
 168                         break;
 169                 default:
 170                         sprintf (info->name, "xx%c%d\n", '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
 227 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
 228 {
 229         return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
 230 }
 231
 232
 233
 234 void print_part_iso(block_dev_desc_t * dev_desc)
 235 {
 236         disk_partition_t info;
 237         int i;
 238         if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
 239                 printf("** No boot partition found on device %d **\n",dev_desc->dev);
 240                 return;
 241         }
 242         printf("Part   Start     Sect x Size Type\n");
 243         i=0;
 244         do {
 245                 printf (" %2d %8ld %8ld %6ld %.32s\n",
 246                         i, info.start, info.size, info.blksz, info.type);
 247                 i++;
 248         } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
 249 }
 250
 251 int test_part_iso (block_dev_desc_t *dev_desc)
 252 {
 253         disk_partition_t info;
 254
 255         return(get_partition_info_iso_verb(dev_desc,0,&info,0));
 256 }
 257
 258 #endif /* ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_ISO_PARTITION) */