/* * (C) Copyright 2001 * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. * * SPDX-License-Identifier: GPL-2.0+ */ #include <common.h> #include <command.h> #include "part_iso.h" #ifdef HAVE_BLOCK_DEVICE /* #define ISO_PART_DEBUG */ #ifdef ISO_PART_DEBUG #define PRINTF(fmt,args...) printf (fmt ,##args) #else #define PRINTF(fmt,args...) #endif /* enable this if CDs are written with the PowerPC Platform ID */ #undef CHECK_FOR_POWERPC_PLATTFORM #define CD_SECTSIZE 2048 static unsigned char tmpbuf[CD_SECTSIZE]; /* Convert char[4] in little endian format to the host format integer */ static inline unsigned long le32_to_int(unsigned char *le32) { return ((le32[3] << 24) + (le32[2] << 16) + (le32[1] << 8) + le32[0] ); } /* Convert char[2] in little endian format to the host format integer */ static inline unsigned short le16_to_int(unsigned char *le16) { return ((le16[1] << 8) + le16[0] ); } /* only boot records will be listed as valid partitions */ int get_partition_info_iso_verb(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info, int verb) { int i,offset,entry_num; unsigned short *chksumbuf; unsigned short chksum; unsigned long newblkaddr,blkaddr,lastsect,bootaddr; iso_boot_rec_t *pbr = (iso_boot_rec_t *)tmpbuf; /* boot record */ iso_pri_rec_t *ppr = (iso_pri_rec_t *)tmpbuf; /* primary desc */ iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; iso_init_def_entry_t *pide; if (dev_desc->blksz != CD_SECTSIZE) return -1; /* the first sector (sector 0x10) must be a primary volume desc */ blkaddr=PVD_OFFSET; if (dev_desc->block_read (dev_desc->dev, PVD_OFFSET, 1, (ulong *) tmpbuf) != 1) return (-1); if(ppr->desctype!=0x01) { if(verb) printf ("** First descriptor is NOT a primary desc on %d:%d **\n", dev_desc->dev, part_num); return (-1); } if(strncmp((char *)ppr->stand_ident,"CD001",5)!=0) { if(verb) printf ("** Wrong ISO Ident: %s on %d:%d **\n", ppr->stand_ident,dev_desc->dev, part_num); return (-1); } lastsect= ((ppr->firstsek_LEpathtab1_LE & 0x000000ff)<<24) + ((ppr->firstsek_LEpathtab1_LE & 0x0000ff00)<< 8) + ((ppr->firstsek_LEpathtab1_LE & 0x00ff0000)>> 8) + ((ppr->firstsek_LEpathtab1_LE & 0xff000000)>>24) ; info->blksz=ppr->secsize_BE; /* assuming same block size for all entries */ PRINTF(" Lastsect:%08lx\n",lastsect); for(i=blkaddr;i<lastsect;i++) { PRINTF("Reading block %d\n", i); if (dev_desc->block_read (dev_desc->dev, i, 1, (ulong *) tmpbuf) != 1) return (-1); if(ppr->desctype==0x00) break; /* boot entry found */ if(ppr->desctype==0xff) { if(verb) printf ("** No valid boot catalog found on %d:%d **\n", dev_desc->dev, part_num); return (-1); } } /* boot entry found */ if(strncmp(pbr->ident_str,"EL TORITO SPECIFICATION",23)!=0) { if(verb) printf ("** Wrong El Torito ident: %s on %d:%d **\n", pbr->ident_str,dev_desc->dev, part_num); return (-1); } bootaddr=le32_to_int(pbr->pointer); PRINTF(" Boot Entry at: %08lX\n",bootaddr); if (dev_desc->block_read (dev_desc->dev, bootaddr, 1, (ulong *) tmpbuf) != 1) { if(verb) printf ("** Can't read Boot Entry at %lX on %d:%d **\n", bootaddr,dev_desc->dev, part_num); return (-1); } chksum=0; chksumbuf = (unsigned short *)tmpbuf; for(i=0;i<0x10;i++) chksum+=((chksumbuf[i] &0xff)<<8)+((chksumbuf[i] &0xff00)>>8); if(chksum!=0) { if(verb) printf ("** Checksum Error in booting catalog validation entry on %d:%d **\n", dev_desc->dev, part_num); return (-1); } if((pve->key[0]!=0x55)||(pve->key[1]!=0xAA)) { if(verb) printf ("** Key 0x55 0xAA error on %d:%d **\n", dev_desc->dev, part_num); return(-1); } #ifdef CHECK_FOR_POWERPC_PLATTFORM if(pve->platform!=0x01) { if(verb) printf ("** No PowerPC platform CD on %d:%d **\n", dev_desc->dev, part_num); return(-1); } #endif /* the validation entry seems to be ok, now search the "partition" */ entry_num=0; offset=0x20; sprintf ((char *)info->type, "U-Boot"); switch(dev_desc->if_type) { case IF_TYPE_IDE: case IF_TYPE_SATA: case IF_TYPE_ATAPI: sprintf ((char *)info->name, "hd%c%d", 'a' + dev_desc->dev, part_num); break; case IF_TYPE_SCSI: sprintf ((char *)info->name, "sd%c%d", 'a' + dev_desc->dev, part_num); break; case IF_TYPE_USB: sprintf ((char *)info->name, "usbd%c%d", 'a' + dev_desc->dev, part_num); break; case IF_TYPE_DOC: sprintf ((char *)info->name, "docd%c%d", 'a' + dev_desc->dev, part_num); break; default: sprintf ((char *)info->name, "xx%c%d", 'a' + dev_desc->dev, part_num); break; } /* the bootcatalog (including validation Entry) is limited to 2048Bytes * (63 boot entries + validation entry) */ while(offset<2048) { pide=(iso_init_def_entry_t *)&tmpbuf[offset]; if ((pide->boot_ind==0x88) || (pide->boot_ind==0x00)) { /* Header Id for default Sections Entries */ if(entry_num==part_num) { /* part found */ goto found; } entry_num++; /* count partitions Entries (boot and non bootables */ offset+=0x20; continue; } if ((pide->boot_ind==0x90) || /* Section Header Entry */ (pide->boot_ind==0x91) || /* Section Header Entry (last) */ (pide->boot_ind==0x44)) { /* Extension Indicator */ offset+=0x20; /* skip unused entries */ } else { if(verb) printf ("** Partition %d not found on device %d **\n", part_num,dev_desc->dev); return(-1); } } /* if we reach this point entire sector has been * searched w/o succsess */ if(verb) printf ("** Partition %d not found on device %d **\n", part_num,dev_desc->dev); return(-1); found: if(pide->boot_ind!=0x88) { if(verb) printf ("** Partition %d is not bootable on device %d **\n", part_num,dev_desc->dev); return (-1); } switch(pide->boot_media) { case 0x00: /* no emulation */ info->size=le16_to_int(pide->sec_cnt)>>2; break; case 0x01: info->size=2400>>2; break; /* 1.2MByte Floppy */ case 0x02: info->size=2880>>2; break; /* 1.44MByte Floppy */ case 0x03: info->size=5760>>2; break; /* 2.88MByte Floppy */ case 0x04: info->size=2880>>2; break; /* dummy (HD Emulation) */ default: info->size=0; break; } newblkaddr=le32_to_int(pide->rel_block_addr); info->start=newblkaddr; PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); return 0; } int get_partition_info_iso(block_dev_desc_t * dev_desc, int part_num, disk_partition_t * info) { return(get_partition_info_iso_verb(dev_desc, part_num, info, 1)); } void print_part_iso(block_dev_desc_t * dev_desc) { disk_partition_t info; int i; if(get_partition_info_iso_verb(dev_desc,0,&info,0)==-1) { printf("** No boot partition found on device %d **\n",dev_desc->dev); return; } printf("Part Start Sect x Size Type\n"); i=0; do { printf(" %2d " LBAFU " " LBAFU " %6ld %.32s\n", i, info.start, info.size, info.blksz, info.type); i++; } while (get_partition_info_iso_verb(dev_desc,i,&info,0)!=-1); } int test_part_iso (block_dev_desc_t *dev_desc) { disk_partition_t info; return(get_partition_info_iso_verb(dev_desc,0,&info,0)); } #endif