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