1 /* 2 * (C) Copyright 2001 3 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. 4 * 5 * SPDX-License-Identifier: GPL-2.0+ 6 */ 7 8 #include <common.h> 9 #include <command.h> 10 #include "part_iso.h" 11 12 #ifdef HAVE_BLOCK_DEVICE 13 14 /* #define ISO_PART_DEBUG */ 15 16 #ifdef ISO_PART_DEBUG 17 #define PRINTF(fmt,args...) printf (fmt ,##args) 18 #else 19 #define PRINTF(fmt,args...) 20 #endif 21 22 /* enable this if CDs are written with the PowerPC Platform ID */ 23 #undef CHECK_FOR_POWERPC_PLATTFORM 24 #define CD_SECTSIZE 2048 25 26 static unsigned char tmpbuf[CD_SECTSIZE]; 27 28 /* Convert char[4] in little endian format to the host format integer 29 */ 30 static inline unsigned long le32_to_int(unsigned char *le32) 31 { 32 return ((le32[3] << 24) + 33 (le32[2] << 16) + 34 (le32[1] << 8) + 35 le32[0] 36 ); 37 } 38 /* Convert char[2] in little endian format to the host format integer 39 */ 40 static inline unsigned short le16_to_int(unsigned char *le16) 41 { 42 return ((le16[1] << 8) + 43 le16[0] 44 ); 45 } 46 47 48 /* only boot records will be listed as valid partitions */ 49 int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb) 50 { 51 int i,offset,entry_num; 52 unsigned short *chksumbuf; 53 unsigned short chksum; 54 unsigned long newblkaddr,blkaddr,lastsect,bootaddr; 55 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ 56 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ 57 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; 58 iso_init_def_entry_t *pide; 59 60 if (dev_desc->blksz != CD_SECTSIZE) 61 return -1; 62 63 /* the first sector (sector 0x10) must be a primary volume desc */ 64 blkaddr=PVD_OFFSET; 65 if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1) 66 return (-1); 67 if(ppr->desctype!=0x01) { 68 if(verb) 69 printf ("** First descriptor is NOT a primary desc on %d:%d **\n", 70 dev_desc->dev, part_num); 71 return (-1); 72 } 73 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { 74 if(verb) 75 printf ("** Wrong ISO Ident: %s on %d:%d **\n", 76 ppr->stand_ident,dev_desc->dev, part_num); 77 return (-1); 78 } 79 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) + 80 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) + 81 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) + 82 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ; 83 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ 84 PRINTF(" Lastsect:%08lx\n",lastsect); 85 for(i=blkaddr;i<lastsect;i++) { 86 PRINTF("Reading block %d\n", i); 87 if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1) 88 return (-1); 89 if(ppr->desctype==0x00) 90 break; /* boot entry found */ 91 if(ppr->desctype==0xff) { 92 if(verb) 93 printf ("** No valid boot catalog found on %d:%d **\n", 94 dev_desc->dev, part_num); 95 return (-1); 96 } 97 } 98 /* boot entry found */ 99 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 100 if(verb) 101 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 102 pbr->ident_str,dev_desc->dev, part_num); 103 return (-1); 104 } 105 bootaddr=le32_to_int(pbr->pointer); 106 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 107 if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) { 108 if(verb) 109 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 110 bootaddr,dev_desc->dev, part_num); 111 return (-1); 112 } 113 chksum=0; 114 chksumbuf = (unsigned short *)tmpbuf; 115 for(i=0;i<0x10;i++) 116 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8); 117 if(chksum!=0) { 118 if(verb) 119 printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n", 120 dev_desc->dev, part_num); 121 return (-1); 122 } 123 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 124 if(verb) 125 printf ("** Key 0x55 0xAA error on %d:%d **\n", 126 dev_desc->dev, part_num); 127 return(-1); 128 } 129 #ifdef CHECK_FOR_POWERPC_PLATTFORM 130 if(pve->platform!=0x01) { 131 if(verb) 132 printf ("** No PowerPC platform CD on %d:%d **\n", 133 dev_desc->dev, part_num); 134 return(-1); 135 } 136 #endif 137 /* the validation entry seems to be ok, now search the "partition" */ 138 entry_num=0; 139 offset=0x20; 140 sprintf ((char *)info->type, "U-Boot"); 141 switch(dev_desc->if_type) { 142 case IF_TYPE_IDE: 143 case IF_TYPE_SATA: 144 case IF_TYPE_ATAPI: 145 sprintf ((char *)info->name, "hd%c%d", 146 'a' + dev_desc->dev, part_num); 147 break; 148 case IF_TYPE_SCSI: 149 sprintf ((char *)info->name, "sd%c%d", 150 'a' + dev_desc->dev, part_num); 151 break; 152 case IF_TYPE_USB: 153 sprintf ((char *)info->name, "usbd%c%d", 154 'a' + dev_desc->dev, part_num); 155 break; 156 case IF_TYPE_DOC: 157 sprintf ((char *)info->name, "docd%c%d", 158 'a' + dev_desc->dev, part_num); 159 break; 160 default: 161 sprintf ((char *)info->name, "xx%c%d", 162 'a' + dev_desc->dev, part_num); 163 break; 164 } 165 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 166 * (63 boot entries + validation entry) */ 167 while(offset<2048) { 168 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 169 if ((pide->boot_ind==0x88) || 170 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 171 if(entry_num==part_num) { /* part found */ 172 goto found; 173 } 174 entry_num++; /* count partitions Entries (boot and non bootables */ 175 offset+=0x20; 176 continue; 177 } 178 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 179 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 180 (pide->boot_ind==0x44)) { /* Extension Indicator */ 181 offset+=0x20; /* skip unused entries */ 182 } 183 else { 184 if(verb) 185 printf ("** Partition %d not found on device %d **\n", 186 part_num,dev_desc->dev); 187 return(-1); 188 } 189 } 190 /* if we reach this point entire sector has been 191 * searched w/o succsess */ 192 if(verb) 193 printf ("** Partition %d not found on device %d **\n", 194 part_num,dev_desc->dev); 195 return(-1); 196 found: 197 if(pide->boot_ind!=0x88) { 198 if(verb) 199 printf ("** Partition %d is not bootable on device %d **\n", 200 part_num,dev_desc->dev); 201 return (-1); 202 } 203 switch(pide->boot_media) { 204 case 0x00: /* no emulation */ 205 info->size=le16_to_int(pide->sec_cnt)>>2; 206 break; 207 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 208 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 209 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 210 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 211 default: info->size=0; break; 212 } 213 newblkaddr=le32_to_int(pide->rel_block_addr); 214 info->start=newblkaddr; 215 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); 216 return 0; 217 } 218 219 int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info) 220 { 221 return(get_partition_info_iso_verb(dev_desc, part_num, info, 1)); 222 } 223 224 225 void print_part_iso(block_dev_desc_t * dev_desc) 226 { 227 disk_partition_t info; 228 int i; 229 if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) { 230 printf("** No boot partition found on device %d **\n",dev_desc->dev); 231 return; 232 } 233 printf("Part Start Sect x Size Type\n"); 234 i=0; 235 do { 236 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", 237 i, info.start, info.size, info.blksz, info.type); 238 i++; 239 } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1); 240 } 241 242 int test_part_iso (block_dev_desc_t *dev_desc) 243 { 244 disk_partition_t info; 245 246 return(get_partition_info_iso_verb(dev_desc,0,&info,0)); 247 } 248 249 #endif 250