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 <asm/unaligned.h> 11 #include "part_iso.h" 12 13 #ifdef HAVE_BLOCK_DEVICE 14 15 /* #define ISO_PART_DEBUG */ 16 17 #ifdef ISO_PART_DEBUG 18 #define PRINTF(fmt,args...) printf (fmt ,##args) 19 #else 20 #define PRINTF(fmt,args...) 21 #endif 22 23 /* enable this if CDs are written with the PowerPC Platform ID */ 24 #undef CHECK_FOR_POWERPC_PLATTFORM 25 #define CD_SECTSIZE 2048 26 27 static unsigned char tmpbuf[CD_SECTSIZE]; 28 29 /* only boot records will be listed as valid partitions */ 30 int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, 31 disk_partition_t *info, int verb) 32 { 33 int i,offset,entry_num; 34 unsigned short *chksumbuf; 35 unsigned short chksum; 36 unsigned long newblkaddr,blkaddr,lastsect,bootaddr; 37 iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ 38 iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ 39 iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; 40 iso_init_def_entry_t *pide; 41 42 if (dev_desc->blksz != CD_SECTSIZE) 43 return -1; 44 45 /* the first sector (sector 0x10) must be a primary volume desc */ 46 blkaddr=PVD_OFFSET; 47 if (blk_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1) 48 return -1; 49 if(ppr->desctype!=0x01) { 50 if(verb) 51 printf ("** First descriptor is NOT a primary desc on %d:%d **\n", 52 dev_desc->devnum, part_num); 53 return (-1); 54 } 55 if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { 56 if(verb) 57 printf ("** Wrong ISO Ident: %s on %d:%d **\n", 58 ppr->stand_ident, dev_desc->devnum, part_num); 59 return (-1); 60 } 61 lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) + 62 ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) + 63 ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) + 64 ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ; 65 info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ 66 PRINTF(" Lastsect:%08lx\n",lastsect); 67 for(i=blkaddr;i<lastsect;i++) { 68 PRINTF("Reading block %d\n", i); 69 if (blk_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) 70 return -1; 71 if(ppr->desctype==0x00) 72 break; /* boot entry found */ 73 if(ppr->desctype==0xff) { 74 if(verb) 75 printf ("** No valid boot catalog found on %d:%d **\n", 76 dev_desc->devnum, part_num); 77 return (-1); 78 } 79 } 80 /* boot entry found */ 81 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 82 if(verb) 83 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 84 pbr->ident_str, dev_desc->devnum, part_num); 85 return (-1); 86 } 87 bootaddr = get_unaligned_le32(pbr->pointer); 88 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 89 if (blk_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { 90 if(verb) 91 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 92 bootaddr, dev_desc->devnum, part_num); 93 return (-1); 94 } 95 chksum=0; 96 chksumbuf = (unsigned short *)tmpbuf; 97 for(i=0;i<0x10;i++) 98 chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8); 99 if(chksum!=0) { 100 if(verb) 101 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n", 102 dev_desc->devnum, part_num); 103 return (-1); 104 } 105 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 106 if(verb) 107 printf ("** Key 0x55 0xAA error on %d:%d **\n", 108 dev_desc->devnum, part_num); 109 return(-1); 110 } 111 #ifdef CHECK_FOR_POWERPC_PLATTFORM 112 if(pve->platform!=0x01) { 113 if(verb) 114 printf ("** No PowerPC platform CD on %d:%d **\n", 115 dev_desc->devnum, part_num); 116 return(-1); 117 } 118 #endif 119 /* the validation entry seems to be ok, now search the "partition" */ 120 entry_num=0; 121 offset=0x20; 122 strcpy((char *)info->type, "U-Boot"); 123 switch(dev_desc->if_type) { 124 case IF_TYPE_IDE: 125 case IF_TYPE_SATA: 126 case IF_TYPE_ATAPI: 127 sprintf ((char *)info->name, "hd%c%d", 128 'a' + dev_desc->devnum, part_num); 129 break; 130 case IF_TYPE_SCSI: 131 sprintf ((char *)info->name, "sd%c%d", 132 'a' + dev_desc->devnum, part_num); 133 break; 134 case IF_TYPE_USB: 135 sprintf ((char *)info->name, "usbd%c%d", 136 'a' + dev_desc->devnum, part_num); 137 break; 138 case IF_TYPE_DOC: 139 sprintf ((char *)info->name, "docd%c%d", 140 'a' + dev_desc->devnum, part_num); 141 break; 142 default: 143 sprintf ((char *)info->name, "xx%c%d", 144 'a' + dev_desc->devnum, part_num); 145 break; 146 } 147 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 148 * (63 boot entries + validation entry) */ 149 while(offset<2048) { 150 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 151 if ((pide->boot_ind==0x88) || 152 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 153 if(entry_num==part_num) { /* part found */ 154 goto found; 155 } 156 entry_num++; /* count partitions Entries (boot and non bootables */ 157 offset+=0x20; 158 continue; 159 } 160 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 161 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 162 (pide->boot_ind==0x44)) { /* Extension Indicator */ 163 offset+=0x20; /* skip unused entries */ 164 } 165 else { 166 if(verb) 167 printf ("** Partition %d not found on device %d **\n", 168 part_num, dev_desc->devnum); 169 return(-1); 170 } 171 } 172 /* if we reach this point entire sector has been 173 * searched w/o succsess */ 174 if(verb) 175 printf ("** Partition %d not found on device %d **\n", 176 part_num, dev_desc->devnum); 177 return(-1); 178 found: 179 if(pide->boot_ind!=0x88) { 180 if(verb) 181 printf("** Partition %d is not bootable on device %d **\n", 182 part_num, dev_desc->devnum); 183 return (-1); 184 } 185 switch(pide->boot_media) { 186 case 0x00: /* no emulation */ 187 info->size = get_unaligned_le16(pide->sec_cnt)>>2; 188 break; 189 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 190 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 191 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 192 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 193 default: info->size=0; break; 194 } 195 newblkaddr = get_unaligned_le32(pide->rel_block_addr); 196 info->start=newblkaddr; 197 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); 198 return 0; 199 } 200 201 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num, 202 disk_partition_t *info) 203 { 204 return part_get_info_iso_verb(dev_desc, part_num, info, 1); 205 } 206 207 static void part_print_iso(struct blk_desc *dev_desc) 208 { 209 disk_partition_t info; 210 int i; 211 212 if (part_get_info_iso_verb(dev_desc, 0, &info, 0) == -1) { 213 printf("** No boot partition found on device %d **\n", 214 dev_desc->devnum); 215 return; 216 } 217 printf("Part Start Sect x Size Type\n"); 218 i=0; 219 do { 220 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", 221 i, info.start, info.size, info.blksz, info.type); 222 i++; 223 } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1); 224 } 225 226 static int part_test_iso(struct blk_desc *dev_desc) 227 { 228 disk_partition_t info; 229 230 return part_get_info_iso_verb(dev_desc, 0, &info, 0); 231 } 232 233 U_BOOT_PART_TYPE(iso) = { 234 .name = "ISO", 235 .part_type = PART_TYPE_ISO, 236 .get_info = part_get_info_iso, 237 .print = part_print_iso, 238 .test = part_test_iso, 239 }; 240 #endif 241