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 unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start, 30 lbaint_t blkcnt, void *buffer) 31 { 32 unsigned long ret; 33 34 if (block_dev->blksz == 512) { 35 /* Convert from 2048 to 512 sector size */ 36 start *= 4; 37 blkcnt *= 4; 38 } 39 40 ret = blk_dread(block_dev, start, blkcnt, buffer); 41 42 if (block_dev->blksz == 512) 43 ret /= 4; 44 45 return ret; 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) && (dev_desc->blksz != 512)) 62 return -1; 63 64 /* the first sector (sector 0x10) must be a primary volume desc */ 65 blkaddr=PVD_OFFSET; 66 if (iso_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 = le32_to_cpu(ppr->firstsek_LEpathtab1_LE); 81 /* assuming same block size for all entries */ 82 info->blksz = be16_to_cpu(ppr->secsize_BE); 83 PRINTF(" Lastsect:%08lx\n",lastsect); 84 for(i=blkaddr;i<lastsect;i++) { 85 PRINTF("Reading block %d\n", i); 86 if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) 87 return -1; 88 if(ppr->desctype==0x00) 89 break; /* boot entry found */ 90 if(ppr->desctype==0xff) { 91 if(verb) 92 printf ("** No valid boot catalog found on %d:%d **\n", 93 dev_desc->devnum, part_num); 94 return (-1); 95 } 96 } 97 /* boot entry found */ 98 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 99 if(verb) 100 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 101 pbr->ident_str, dev_desc->devnum, part_num); 102 return (-1); 103 } 104 bootaddr = get_unaligned_le32(pbr->pointer); 105 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 106 if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { 107 if(verb) 108 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 109 bootaddr, dev_desc->devnum, part_num); 110 return (-1); 111 } 112 chksum=0; 113 chksumbuf = (unsigned short *)tmpbuf; 114 for(i=0;i<0x10;i++) 115 chksum += le16_to_cpu(chksumbuf[i]); 116 if(chksum!=0) { 117 if(verb) 118 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n", 119 dev_desc->devnum, part_num); 120 return (-1); 121 } 122 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 123 if(verb) 124 printf ("** Key 0x55 0xAA error on %d:%d **\n", 125 dev_desc->devnum, part_num); 126 return(-1); 127 } 128 #ifdef CHECK_FOR_POWERPC_PLATTFORM 129 if(pve->platform!=0x01) { 130 if(verb) 131 printf ("** No PowerPC platform CD on %d:%d **\n", 132 dev_desc->devnum, part_num); 133 return(-1); 134 } 135 #endif 136 /* the validation entry seems to be ok, now search the "partition" */ 137 entry_num=1; 138 offset=0x20; 139 strcpy((char *)info->type, "U-Boot"); 140 part_set_generic_name(dev_desc, part_num, (char *)info->name); 141 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 142 * (63 boot entries + validation entry) */ 143 while(offset<2048) { 144 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 145 if ((pide->boot_ind==0x88) || 146 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 147 if(entry_num==part_num) { /* part found */ 148 goto found; 149 } 150 entry_num++; /* count partitions Entries (boot and non bootables */ 151 offset+=0x20; 152 continue; 153 } 154 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 155 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 156 (pide->boot_ind==0x44)) { /* Extension Indicator */ 157 offset+=0x20; /* skip unused entries */ 158 } 159 else { 160 if(verb) 161 printf ("** Partition %d not found on device %d **\n", 162 part_num, dev_desc->devnum); 163 return(-1); 164 } 165 } 166 /* if we reach this point entire sector has been 167 * searched w/o succsess */ 168 if(verb) 169 printf ("** Partition %d not found on device %d **\n", 170 part_num, dev_desc->devnum); 171 return(-1); 172 found: 173 if(pide->boot_ind!=0x88) { 174 if(verb) 175 printf("** Partition %d is not bootable on device %d **\n", 176 part_num, dev_desc->devnum); 177 return (-1); 178 } 179 switch(pide->boot_media) { 180 case 0x00: /* no emulation */ 181 info->size = get_unaligned_le16(pide->sec_cnt)>>2; 182 break; 183 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 184 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 185 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 186 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 187 default: info->size=0; break; 188 } 189 newblkaddr = get_unaligned_le32(pide->rel_block_addr); 190 info->start=newblkaddr; 191 192 if (dev_desc->blksz == 512) { 193 info->size *= 4; 194 info->start *= 4; 195 info->blksz = 512; 196 } 197 198 PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size); 199 return 0; 200 } 201 202 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num, 203 disk_partition_t *info) 204 { 205 return part_get_info_iso_verb(dev_desc, part_num, info, 1); 206 } 207 208 static void part_print_iso(struct blk_desc *dev_desc) 209 { 210 disk_partition_t info; 211 int i; 212 213 if (part_get_info_iso_verb(dev_desc, 1, &info, 0) == -1) { 214 printf("** No boot partition found on device %d **\n", 215 dev_desc->devnum); 216 return; 217 } 218 printf("Part Start Sect x Size Type\n"); 219 i=1; 220 do { 221 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", 222 i, info.start, info.size, info.blksz, info.type); 223 i++; 224 } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1); 225 } 226 227 static int part_test_iso(struct blk_desc *dev_desc) 228 { 229 disk_partition_t info; 230 231 return part_get_info_iso_verb(dev_desc, 1, &info, 1); 232 } 233 234 U_BOOT_PART_TYPE(iso) = { 235 .name = "ISO", 236 .part_type = PART_TYPE_ISO, 237 .max_entries = ISO_ENTRY_NUMBERS, 238 .get_info = part_get_info_iso, 239 .print = part_print_iso, 240 .test = part_test_iso, 241 }; 242 #endif 243