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 48 static unsigned char tmpbuf[CD_SECTSIZE]; 49 50 /* Convert char[4] in little endian format to the host format integer 51 */ 52 static 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 */ 62 static 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 */ 71 int 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); 215 found: 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 } 237 238 int 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 } 242 243 244 void 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 } 260 261 int 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