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 = le32_to_cpu(ppr->firstsek_LEpathtab1_LE); 62 /* assuming same block size for all entries */ 63 info->blksz = be16_to_cpu(ppr->secsize_BE); 64 PRINTF(" Lastsect:%08lx\n",lastsect); 65 for(i=blkaddr;i<lastsect;i++) { 66 PRINTF("Reading block %d\n", i); 67 if (blk_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) 68 return -1; 69 if(ppr->desctype==0x00) 70 break; /* boot entry found */ 71 if(ppr->desctype==0xff) { 72 if(verb) 73 printf ("** No valid boot catalog found on %d:%d **\n", 74 dev_desc->devnum, part_num); 75 return (-1); 76 } 77 } 78 /* boot entry found */ 79 if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { 80 if(verb) 81 printf ("** Wrong El Torito ident: %s on %d:%d **\n", 82 pbr->ident_str, dev_desc->devnum, part_num); 83 return (-1); 84 } 85 bootaddr = get_unaligned_le32(pbr->pointer); 86 PRINTF(" Boot Entry at: %08lX\n",bootaddr); 87 if (blk_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { 88 if(verb) 89 printf ("** Can't read Boot Entry at %lX on %d:%d **\n", 90 bootaddr, dev_desc->devnum, part_num); 91 return (-1); 92 } 93 chksum=0; 94 chksumbuf = (unsigned short *)tmpbuf; 95 for(i=0;i<0x10;i++) 96 chksum += le16_to_cpu(chksumbuf[i]); 97 if(chksum!=0) { 98 if(verb) 99 printf("** Checksum Error in booting catalog validation entry on %d:%d **\n", 100 dev_desc->devnum, part_num); 101 return (-1); 102 } 103 if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { 104 if(verb) 105 printf ("** Key 0x55 0xAA error on %d:%d **\n", 106 dev_desc->devnum, part_num); 107 return(-1); 108 } 109 #ifdef CHECK_FOR_POWERPC_PLATTFORM 110 if(pve->platform!=0x01) { 111 if(verb) 112 printf ("** No PowerPC platform CD on %d:%d **\n", 113 dev_desc->devnum, part_num); 114 return(-1); 115 } 116 #endif 117 /* the validation entry seems to be ok, now search the "partition" */ 118 entry_num=0; 119 offset=0x20; 120 strcpy((char *)info->type, "U-Boot"); 121 switch(dev_desc->if_type) { 122 case IF_TYPE_IDE: 123 case IF_TYPE_SATA: 124 case IF_TYPE_ATAPI: 125 sprintf ((char *)info->name, "hd%c%d", 126 'a' + dev_desc->devnum, part_num); 127 break; 128 case IF_TYPE_SCSI: 129 sprintf ((char *)info->name, "sd%c%d", 130 'a' + dev_desc->devnum, part_num); 131 break; 132 case IF_TYPE_USB: 133 sprintf ((char *)info->name, "usbd%c%d", 134 'a' + dev_desc->devnum, part_num); 135 break; 136 case IF_TYPE_DOC: 137 sprintf ((char *)info->name, "docd%c%d", 138 'a' + dev_desc->devnum, part_num); 139 break; 140 default: 141 sprintf ((char *)info->name, "xx%c%d", 142 'a' + dev_desc->devnum, part_num); 143 break; 144 } 145 /* the bootcatalog (including validation Entry) is limited to 2048Bytes 146 * (63 boot entries + validation entry) */ 147 while(offset<2048) { 148 pide=(iso_init_def_entry_t *)&tmpbuf[offset]; 149 if ((pide->boot_ind==0x88) || 150 (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ 151 if(entry_num==part_num) { /* part found */ 152 goto found; 153 } 154 entry_num++; /* count partitions Entries (boot and non bootables */ 155 offset+=0x20; 156 continue; 157 } 158 if ((pide->boot_ind==0x90) || /* Section Header Entry */ 159 (pide->boot_ind==0x91) || /* Section Header Entry (last) */ 160 (pide->boot_ind==0x44)) { /* Extension Indicator */ 161 offset+=0x20; /* skip unused entries */ 162 } 163 else { 164 if(verb) 165 printf ("** Partition %d not found on device %d **\n", 166 part_num, dev_desc->devnum); 167 return(-1); 168 } 169 } 170 /* if we reach this point entire sector has been 171 * searched w/o succsess */ 172 if(verb) 173 printf ("** Partition %d not found on device %d **\n", 174 part_num, dev_desc->devnum); 175 return(-1); 176 found: 177 if(pide->boot_ind!=0x88) { 178 if(verb) 179 printf("** Partition %d is not bootable on device %d **\n", 180 part_num, dev_desc->devnum); 181 return (-1); 182 } 183 switch(pide->boot_media) { 184 case 0x00: /* no emulation */ 185 info->size = get_unaligned_le16(pide->sec_cnt)>>2; 186 break; 187 case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ 188 case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ 189 case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ 190 case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ 191 default: info->size=0; break; 192 } 193 newblkaddr = get_unaligned_le32(pide->rel_block_addr); 194 info->start=newblkaddr; 195 PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); 196 return 0; 197 } 198 199 static int part_get_info_iso(struct blk_desc *dev_desc, int part_num, 200 disk_partition_t *info) 201 { 202 return part_get_info_iso_verb(dev_desc, part_num, info, 1); 203 } 204 205 static void part_print_iso(struct blk_desc *dev_desc) 206 { 207 disk_partition_t info; 208 int i; 209 210 if (part_get_info_iso_verb(dev_desc, 0, &info, 0) == -1) { 211 printf("** No boot partition found on device %d **\n", 212 dev_desc->devnum); 213 return; 214 } 215 printf("Part Start Sect x Size Type\n"); 216 i=0; 217 do { 218 printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", 219 i, info.start, info.size, info.blksz, info.type); 220 i++; 221 } while (part_get_info_iso_verb(dev_desc, i, &info, 0) != -1); 222 } 223 224 static int part_test_iso(struct blk_desc *dev_desc) 225 { 226 disk_partition_t info; 227 228 return part_get_info_iso_verb(dev_desc, 0, &info, 0); 229 } 230 231 U_BOOT_PART_TYPE(iso) = { 232 .name = "ISO", 233 .part_type = PART_TYPE_ISO, 234 .get_info = part_get_info_iso, 235 .print = part_print_iso, 236 .test = part_test_iso, 237 }; 238 #endif 239