diff options
Diffstat (limited to 'disk/part_iso.c')
| -rwxr-xr-x | disk/part_iso.c | 260 |
1 files changed, 260 insertions, 0 deletions
diff --git a/disk/part_iso.c b/disk/part_iso.c new file mode 100755 index 0000000..0735324 --- /dev/null +++ b/disk/part_iso.c @@ -0,0 +1,260 @@ +/* + * (C) Copyright 2001 + * Denis Peter, MPL AG Switzerland, d.peter@mpl.ch. + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License as + * published by the Free Software Foundation; either version 2 of + * the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + */ + +#include <common.h> +#include <command.h> +#include "part_iso.h" + +#if ((CONFIG_COMMANDS & CFG_CMD_IDE) || \ + (CONFIG_COMMANDS & CFG_CMD_SCSI) || \ + (CONFIG_COMMANDS & CFG_CMD_USB) || \ + defined(CONFIG_MMC) || \ + defined(CONFIG_SYSTEMACE) ) && defined(CONFIG_ISO_PARTITION) + +/* #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; + + /* 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_ATAPI: + sprintf ((char *)info->name, "hd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_SCSI: + sprintf ((char *)info->name, "sd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_USB: + sprintf ((char *)info->name, "usbd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + case IF_TYPE_DOC: + sprintf ((char *)info->name, "docd%c%d\n", 'a' + dev_desc->dev, part_num); + break; + default: + sprintf ((char *)info->name, "xx%c%d\n", '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 %8ld %8ld %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 /* ((CONFIG_COMMANDS & CFG_CMD_IDE) || (CONFIG_COMMANDS & CFG_CMD_SCSI)) && defined(CONFIG_ISO_PARTITION) */ |