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