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 if (dev_desc->blksz != CD_SECTSIZE) 77 return -1; 78 79 /* the first sector (sector 0x10) must be a primary volume desc */ 80 blkaddr=PVD_OFFSET; 81 if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1) 82 return (-1); 83 if(ppr->desctype!=0x01) { 84 if(verb) 85 printf ("** First descriptor is NOT a primary desc on %d:%d **\n", 86 dev_desc->dev, part_num); 87 return (-1); 88 } 89 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { 90 if(verb) 91 printf ("** Wrong ISO Ident: %s on %d:%d **\n", 92 ppr->stand_ident,dev_desc->dev, part_num); 93 return (-1); 94 } 95 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) + 96 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) + 97 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) + 98 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ; 99 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ 100 PRINTF(" Lastsect:%08lx\n",lastsect); 101 for(i=blkaddr;i<lastsect;i++) { 102 PRINTF("Reading block %d\n", i); 103 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1) 104 return (-1); 105 if(ppr->desctype==0x00) 106 break; /* boot entry found */ 107 if(ppr->desctype==0xff) { 108 if(verb) 109 printf ("** No valid boot catalog found on %d:%d **\n", 110 dev_desc->dev, part_num); 111 return (-1); 112 } 113 } 114 /* boot entry found */ 115 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 116 if(verb) 117 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 118 pbr->ident_str,dev_desc->dev, part_num); 119 return (-1); 120 } 121 bootaddr=le32_to_int(pbr->pointer); 122 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 123 if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) { 124 if(verb) 125 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 126 bootaddr,dev_desc->dev, part_num); 127 return (-1); 128 } 129 chksum=0; 130 chksumbuf = (unsigned short *)tmpbuf; 131 for(i=0;i<0x10;i++) 132 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8); 133 if(chksum!=0) { 134 if(verb) 135 printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n", 136 dev_desc->dev, part_num); 137 return (-1); 138 } 139 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 140 if(verb) 141 printf ("** Key 0x55 0xAA error on %d:%d **\n", 142 dev_desc->dev, part_num); 143 return(-1); 144 } 145 #ifdef CHECK_FOR_POWERPC_PLATTFORM 146 if(pve->platform!=0x01) { 147 if(verb) 148 printf ("** No PowerPC platform CD on %d:%d **\n", 149 dev_desc->dev, part_num); 150 return(-1); 151 } 152 #endif 153 /* the validation entry seems to be ok, now search the "partition" */ 154 entry_num=0; 155 offset=0x20; 156 sprintf ((char *)info->type, "U-Boot"); 157 switch(dev_desc->if_type) { 158 case IF_TYPE_IDE: 159 case IF_TYPE_SATA: 160 case IF_TYPE_ATAPI: 161 sprintf ((char *)info->name, "hd%c%d", 162 'a' + dev_desc->dev, part_num); 163 break; 164 case IF_TYPE_SCSI: 165 sprintf ((char *)info->name, "sd%c%d", 166 'a' + dev_desc->dev, part_num); 167 break; 168 case IF_TYPE_USB: 169 sprintf ((char *)info->name, "usbd%c%d", 170 'a' + dev_desc->dev, part_num); 171 break; 172 case IF_TYPE_DOC: 173 sprintf ((char *)info->name, "docd%c%d", 174 'a' + dev_desc->dev, part_num); 175 break; 176 default: 177 sprintf ((char *)info->name, "xx%c%d", 178 'a' + dev_desc->dev, part_num); 179 break; 180 } 181 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 182 * (63 boot entries + validation entry) */ 183 while(offset<2048) { 184 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 185 if ((pide->boot_ind==0x88) || 186 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 187 if(entry_num==part_num) { /* part found */ 188 goto found; 189 } 190 entry_num++; /* count partitions Entries (boot and non bootables */ 191 offset+=0x20; 192 continue; 193 } 194 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 195 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 196 (pide->boot_ind==0x44)) { /* Extension Indicator */ 197 offset+=0x20; /* skip unused entries */ 198 } 199 else { 200 if(verb) 201 printf ("** Partition %d not found on device %d **\n", 202 part_num,dev_desc->dev); 203 return(-1); 204 } 205 } 206 /* if we reach this point entire sector has been 207 * searched w/o succsess */ 208 if(verb) 209 printf ("** Partition %d not found on device %d **\n", 210 part_num,dev_desc->dev); 211 return(-1); 212 found: 213 if(pide->boot_ind!=0x88) { 214 if(verb) 215 printf ("** Partition %d is not bootable on device %d **\n", 216 part_num,dev_desc->dev); 217 return (-1); 218 } 219 switch(pide->boot_media) { 220 case 0x00: /* no emulation */ 221 info->size=le16_to_int(pide->sec_cnt)>>2; 222 break; 223 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 224 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 225 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 226 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 227 default: info->size=0; break; 228 } 229 newblkaddr=le32_to_int(pide->rel_block_addr); 230 info->start=newblkaddr; 231 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); 232 return 0; 233 } 234 235 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info) 236 { 237 return(get_partition_info_iso_verb(dev_desc, part_num, info, 1)); 238 } 239 240 241 void print_part_iso(block_dev_desc_t * dev_desc) 242 { 243 disk_partition_t info; 244 int i; 245 if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) { 246 printf("** No boot partition found on device %d **\n",dev_desc->dev); 247 return; 248 } 249 printf("Part Start Sect x Size Type\n"); 250 i=0; 251 do { 252 printf (" %2d %8ld %8ld %6ld %.32s\n", 253 i, info.start, info.size, info.blksz, info.type); 254 i++; 255 } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1); 256 } 257 258 int test_part_iso (block_dev_desc_t *dev_desc) 259 { 260 disk_partition_t info; 261 262 return(get_partition_info_iso_verb(dev_desc,0,&info,0)); 263 } 264 265 #endif 266