LXR uboot/disk/part

   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
  48static unsigned char tmpbuf[CD_SECTSIZE];
  49
  50/* Convert char[4] in little endian format to the host format integer
  51 */
  52static 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 */
  62static 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 */
  71int 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",
 165                                'a' + dev_desc->dev, part_num);
 166                        break;
 167                case IF_TYPE_SCSI:
 168                        sprintf ((char *)info->name, "sd%c%d",
 169                                'a' + dev_desc->dev, part_num);
 170                        break;
 171                case IF_TYPE_USB:
 172                        sprintf ((char *)info->name, "usbd%c%d",
 173                                'a' + dev_desc->dev, part_num);
 174                        break;
 175                case IF_TYPE_DOC:
 176                        sprintf ((char *)info->name, "docd%c%d",
 177                                'a' + dev_desc->dev, part_num);
 178                        break;
 179                default:
 180                        sprintf ((char *)info->name, "xx%c%d",
 181                                'a' + dev_desc->dev, part_num);
 182                        break;
 183        }
 184        /* the bootcatalog (including validation Entry) is limited to 2048Bytes
 185         * (63 boot entries + validation entry) */
 186         while(offset<2048) {
 187                pide=(iso_init_def_entry_t *)&tmpbuf[offset];
 188                if ((pide->boot_ind==0x88) ||
 189                    (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */
 190                        if(entry_num==part_num) { /* part found */
 191                                goto found;
 192                        }
 193                        entry_num++; /* count partitions Entries (boot and non bootables */
 194                        offset+=0x20;
 195                        continue;
 196                }
 197                if ((pide->boot_ind==0x90) ||   /* Section Header Entry */
 198                    (pide->boot_ind==0x91) ||   /* Section Header Entry (last) */
 199                    (pide->boot_ind==0x44)) {   /* Extension Indicator */
 200                        offset+=0x20; /* skip unused entries */
 201                }
 202                else {
 203                        if(verb)
 204                                printf ("** Partition %d not found on device %d **\n",
 205                                        part_num,dev_desc->dev);
 206                        return(-1);
 207                }
 208        }
 209        /* if we reach this point entire sector has been
 210         * searched w/o succsess */
 211        if(verb)
 212                printf ("** Partition %d not found on device %d **\n",
 213                        part_num,dev_desc->dev);
 214        return(-1);
 215found:
 216        if(pide->boot_ind!=0x88) {
 217                if(verb)
 218                        printf ("** Partition %d is not bootable on device %d **\n",
 219                                part_num,dev_desc->dev);
 220                return (-1);
 221        }
 222        switch(pide->boot_media) {
 223                case 0x00: /* no emulation */
 224                        info->size=le16_to_int(pide->sec_cnt)>>2;
 225                        break;
 226                case 0x01:      info->size=2400>>2; break; /* 1.2MByte Floppy */
 227                case 0x02:      info->size=2880>>2; break; /* 1.44MByte Floppy */
 228                case 0x03:      info->size=5760>>2; break; /* 2.88MByte Floppy */
 229                case 0x04:      info->size=2880>>2; break; /* dummy (HD Emulation) */
 230                default:        info->size=0; break;
 231        }
 232        newblkaddr=le32_to_int(pide->rel_block_addr);
 233        info->start=newblkaddr;
 234        PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size);
 235        return 0;
 236}
 237
 238int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info)
 239{
 240        return(get_partition_info_iso_verb(dev_desc, part_num, info, 1));
 241}
 242
 243
 244void print_part_iso(block_dev_desc_t * dev_desc)
 245{
 246        disk_partition_t info;
 247        int i;
 248        if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) {
 249                printf("** No boot partition found on device %d **\n",dev_desc->dev);
 250                return;
 251        }
 252        printf("Part   Start     Sect x Size Type\n");
 253        i=0;
 254        do {
 255                printf (" %2d %8ld %8ld %6ld %.32s\n",
 256                        i, info.start, info.size, info.blksz, info.type);
 257                i++;
 258        } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1);
 259}
 260
 261int test_part_iso (block_dev_desc_t *dev_desc)
 262{
 263        disk_partition_t info;
 264
 265        return(get_partition_info_iso_verb(dev_desc,0,&info,0));
 266}
 267
 268#endif
 269