[U-Boot] Booting from MMC, other partition

[Robert Ianovich]

I have a iMX233 with SD as storage and I need to have first partition
fat32, otherways windows will not open the SD card at all. Customer needs
to get/save some data from windows.

So what I did is wrote U-Boot on 2'nd and rootfs on 3'rd.

Command (m for help): p
Disk /dev/sdb: 7,4 GiB, 7969177600 bytes, 15564800 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x763f9f2e

Device     Boot   Start      End Sectors  Size Id Type
/dev/sdb1          2048  8390655 8388608    4G  c W95 FAT32 (LBA)
/dev/sdb2  *    8390656  8521727  131072   64M 53 OnTrack DM6 Aux3
/dev/sdb3       8521728 15564799 7043072  3,4G 83 Linux

U-Boot starts just fine but cannot boot from 3'rd.

There is a solution for this, do I need to recompile U-Boot.

If so, where should I modify.

Thanks very much in advance,