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part_iso.c
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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland, [email protected].
*
* 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