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) */ 259