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Original question:

AM5728: eMMC boot only on EVM

AM5728: Flashing to eMMC how?

Vishal Maheshwari
Expert 1030 points

Part Number: AM5728

Hi,

I have booted am5728 EVM with SD card. I want to flash eMMC with the contents of SD card and then boot from eMMC. How do I do that ?

I ran "fdisk -l". I can't see any eMMC partition of size 8GB.

Please help!

Thanks!

  • 0
    TI__Guru**** 169100 points

    Hi Vishal,

    Please check:

    3.1.1.6.4. Updating an SD card or eMMC with RAW writes in

    Regards,
    Keerthy

  • 0 in reply to Keerthy J
    Expert 1030 points

    Hi,

    I checked the section 3.1.1.6.4 in the link you mentioned.

    3.1.1.6.4. Updating an SD card or eMMC with RAW writes

    It gives the following commands:-

    U-Boot # mmc dev 0
U-Boot # mmc rescan
U-Boot # mmc dev 1
U-Boot # fatload mmc 0 ${loadaddr} MLO
U-Boot # mmc write ${loadaddr} 0x100 0x100
U-Boot # mmc write ${loadaddr} 0x200 0x100
U-Boot # fatload mmc 0 ${loadaddr} u-boot.img
U-Boot # mmc write ${loadaddr} 0x300 0x400
U-Boot # fatload mmc 0 ${loadaddr} rootfs.ext4
U-Boot # mmc write ${loadaddr} 0x1000 ...rootfs.ext4 size in bytes divided by 512, in hex...


    These are my doubts:-
    1) Do I have to partition the eMMC (one for bootloader and the other for rootfs). If yes, then how to do that?
    2) In the command pasted above for MLO :-
    i)First it loads MLO into RAM
    ii) Then it writes into the mmc device. 
    I don't understand why the write command is written twice ? i.e. , 0x100 x100 and 0x200 0x100 ??




  • 0 in reply to Vishal Maheshwari
    TI__Guru**** 169100 points

    Vishal,

    1) 3.1.1.6.1. Partitioning eMMC from U-Boot
        One more way:     3.1.1.6.3. Updating an SD card or eMMC using DFU

    2) https://e2e.ti.com/support/processors/f/791/p/901671/3335174

    This should answer in detail. Basically redundant copies of MLO for RoM code.

    Regards,
    Keerthy