diff options
| -rw-r--r-- | disk/part_iso.c | 36 |
1 files changed, 31 insertions, 5 deletions
diff --git a/disk/part_iso.c b/disk/part_iso.c index 5adb349ceb..9f5c50c73f 100644 --- a/disk/part_iso.c +++ b/disk/part_iso.c @@ -26,6 +26,25 @@ static unsigned char tmpbuf[CD_SECTSIZE]; +unsigned long iso_dread(struct blk_desc *block_dev, lbaint_t start, + lbaint_t blkcnt, void *buffer) +{ + unsigned long ret; + + if (block_dev->blksz == 512) { + /* Convert from 2048 to 512 sector size */ + start *= 4; + blkcnt *= 4; + } + + ret = blk_dread(block_dev, start, blkcnt, buffer); + + if (block_dev->blksz == 512) + ret /= 4; + + return ret; +} + /* only boot records will be listed as valid partitions */ int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, disk_partition_t *info, int verb) @@ -39,12 +58,12 @@ int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, iso_val_entry_t *pve = (iso_val_entry_t *)tmpbuf; iso_init_def_entry_t *pide; - if (dev_desc->blksz != CD_SECTSIZE) + if ((dev_desc->blksz != CD_SECTSIZE) && (dev_desc->blksz != 512)) return -1; /* the first sector (sector 0x10) must be a primary volume desc */ blkaddr=PVD_OFFSET; - if (blk_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1) + if (iso_dread(dev_desc, PVD_OFFSET, 1, (ulong *)tmpbuf) != 1) return -1; if(ppr->desctype!=0x01) { if(verb) @@ -64,7 +83,7 @@ int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, PRINTF(" Lastsect:%08lx\n",lastsect); for(i=blkaddr;i<lastsect;i++) { PRINTF("Reading block %d\n", i); - if (blk_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) + if (iso_dread(dev_desc, i, 1, (ulong *)tmpbuf) != 1) return -1; if(ppr->desctype==0x00) break; /* boot entry found */ @@ -84,7 +103,7 @@ int part_get_info_iso_verb(struct blk_desc *dev_desc, int part_num, } bootaddr = get_unaligned_le32(pbr->pointer); PRINTF(" Boot Entry at: %08lX\n",bootaddr); - if (blk_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { + if (iso_dread(dev_desc, bootaddr, 1, (ulong *)tmpbuf) != 1) { if(verb) printf ("** Can't read Boot Entry at %lX on %d:%d **\n", bootaddr, dev_desc->devnum, part_num); @@ -192,7 +211,14 @@ found: } newblkaddr = get_unaligned_le32(pide->rel_block_addr); info->start=newblkaddr; - PRINTF(" part %d found @ %lx size %lx\n",part_num,newblkaddr,info->size); + + if (dev_desc->blksz == 512) { + info->size *= 4; + info->start *= 4; + info->blksz = 512; + } + + PRINTF(" part %d found @ %lx size %lx\n",part_num,info->start,info->size); return 0; } |
