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_SCSI) || \ 30 defined(CONFIG_CMD_SATA) || \ 31 defined(CONFIG_CMD_USB) || \ 32 defined(CONFIG_MMC) || \ 33 defined(CONFIG_SYSTEMACE) 34 35 /* #define ISO_PART_DEBUG */ 36 37 #ifdef ISO_PART_DEBUG 38 #define PRINTF(fmt,args...) printf (fmt ,##args) 39 #else 40 #define PRINTF(fmt,args...) 41 #endif 42 43 /* enable this if CDs are written with the PowerPC Platform ID */ 44 #undef CHECK_FOR_POWERPC_PLATTFORM 45 #define CD_SECTSIZE 2048 46 47 static unsigned char tmpbuf[CD_SECTSIZE]; 48 49 /* Convert char[4] in little endian format to the host format integer 50 */ 51 static inline unsigned long le32_to_int(unsigned char *le32) 52 { 53 return ((le32[3] << 24) + 54 (le32[2] << 16) + 55 (le32[1] << 8) + 56 le32[0] 57 ); 58 } 59 /* Convert char[2] in little endian format to the host format integer 60 */ 61 static inline unsigned short le16_to_int(unsigned char *le16) 62 { 63 return ((le16[1] << 8) + 64 le16[0] 65 ); 66 } 67 68 69 /* only boot records will be listed as valid partitions */ 70 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb) 71 { 72 int i,offset,entry_num; 73 unsigned short *chksumbuf; 74 unsigned short chksum; 75 unsigned long newblkaddr,blkaddr,lastsect,bootaddr; 76 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ 77 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ 78 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; 79 iso_init_def_entry_t *pide; 80 81 /* the first sector (sector 0x10) must be a primary volume desc */ 82 blkaddr=PVD_OFFSET; 83 if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1) 84 return (-1); 85 if(ppr->desctype!=0x01) { 86 if(verb) 87 printf ("** First descriptor is NOT a primary desc on %d:%d **\n", 88 dev_desc->dev, part_num); 89 return (-1); 90 } 91 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { 92 if(verb) 93 printf ("** Wrong ISO Ident: %s on %d:%d **\n", 94 ppr->stand_ident,dev_desc->dev, part_num); 95 return (-1); 96 } 97 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) + 98 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) + 99 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) + 100 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ; 101 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ 102 PRINTF(" Lastsect:%08lx\n",lastsect); 103 for(i=blkaddr;i<lastsect;i++) { 104 PRINTF("Reading block %d\n", i); 105 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1) 106 return (-1); 107 if(ppr->desctype==0x00) 108 break; /* boot entry found */ 109 if(ppr->desctype==0xff) { 110 if(verb) 111 printf ("** No valid boot catalog found on %d:%d **\n", 112 dev_desc->dev, part_num); 113 return (-1); 114 } 115 } 116 /* boot entry found */ 117 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 118 if(verb) 119 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 120 pbr->ident_str,dev_desc->dev, part_num); 121 return (-1); 122 } 123 bootaddr=le32_to_int(pbr->pointer); 124 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 125 if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) { 126 if(verb) 127 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 128 bootaddr,dev_desc->dev, part_num); 129 return (-1); 130 } 131 chksum=0; 132 chksumbuf = (unsigned short *)tmpbuf; 133 for(i=0;i<0x10;i++) 134 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8); 135 if(chksum!=0) { 136 if(verb) 137 printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n", 138 dev_desc->dev, part_num); 139 return (-1); 140 } 141 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 142 if(verb) 143 printf ("** Key 0x55 0xAA error on %d:%d **\n", 144 dev_desc->dev, part_num); 145 return(-1); 146 } 147 #ifdef CHECK_FOR_POWERPC_PLATTFORM 148 if(pve->platform!=0x01) { 149 if(verb) 150 printf ("** No PowerPC platform CD on %d:%d **\n", 151 dev_desc->dev, part_num); 152 return(-1); 153 } 154 #endif 155 /* the validation entry seems to be ok, now search the "partition" */ 156 entry_num=0; 157 offset=0x20; 158 sprintf ((char *)info->type, "U-Boot"); 159 switch(dev_desc->if_type) { 160 case IF_TYPE_IDE: 161 case IF_TYPE_SATA: 162 case IF_TYPE_ATAPI: 163 sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); 164 break; 165 case IF_TYPE_SCSI: 166 sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); 167 break; 168 case IF_TYPE_USB: 169 sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); 170 break; 171 case IF_TYPE_DOC: 172 sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); 173 break; 174 default: 175 sprintf ((char *)info->name, "xx%c%d\n", '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