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