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AM625: Not able to create boot partition

Saubhik Jaiswal
Prodigy 20 points
Part Number: AM625

Hi TI team,

I am working to create an partition on emmc for boot and rootfs but getting error while creating the boot partition. please find the below logs for your reference.

Method-1

=> setenv uuid_gpt_boot 42b18d48-d0de-4461-ad6a-b7cbe78996b5
=> setenv uuid_gpt_rootfs 38f4224a-dbf9-413a-85d6-1595e9efeecf
=> setenv partitions_boot name=boot,start=2048,size=32768,uuid=${uuid_gpt_boot}
=> setenv partitions_rootfs name=rootfs,start=34816,size=31045632,uuid=${uuid_gpt_rootfs}
=> gpt write mmc 0 ${partitions_boot}
Writing GPT: error!
=> gpt write mmc 0 ${partitions_rootfs}
Writing GPT: success!

Method-2

=> setenv uuid_gpt_boot a17e352b-649d-4df9-b470-14af5733d359
=> setenv partitions_boot name=boot,start=2048,size=32768,uuid=${uuid_gpt_boot}
=> gpt write mmc 0 ${partitions_boot}
Writing GPT: error!

  • 0
    TI__Guru 69541 points

    Hi Saubhik,

    The whole partition layout needs to be given in one command.

    Following is the reference command to partition the eMMC UDA into two GPT partitions

    => setenv uuid_gpt_boot d39df892-87d6-4811-bb62-f5902c4cc75a
=> setenv uuid_gpt_rootfs 147f21e7-6f59-4ba9-a3ac-6a6b27759f57
=> setenv partitions 'name=boot,size=32768,uuid=${uuid_gpt_boot};name=rootfs,size=-,uuid=${uuid_gpt_rootfs}'
=> gpt write mmc 0 $partitions
Writing GPT: success!

    The eMMC is successfully partitioned as shown

    => mmc part

Partition Map for MMC device 0  --   Partition Type: EFI

Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x00000061      "boot"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   d39df892-87d6-4811-bb62-f5902c4cc75a
  2     0x00000062      0x01da3fde      "rootfs"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   147f21e7-6f59-4ba9-a3ac-6a6b27759f57
=>

    Regards,

    Prashant

  • 0 in reply to Prashant Shivhare
    Prodigy 20 points

    Hi 

    I am able to do partition as mentioned by you but not able to flash rootfs after that.

    please find below logs of host and target device

    1. Target device.

    => mmc part

Partition Map for MMC device 0  --   Partition Type: EFI

Part    Start LBA       End LBA         Name
        Attributes
        Type GUID
        Partition GUID
  1     0x00000022      0x00000061      "boot"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   288be330-997a-482e-92bf-9a571725a9e2
  2     0x00000062      0x01da3fde      "rootfs"
        attrs:  0x0000000000000000
        type:   ebd0a0a2-b9e5-4433-87c0-68b6b72699c7
        guid:   b97500e1-a8c7-4753-b03e-e747f92911f7
=> setenv dfu_alt_info ${dfu_alt_info_emmc}
=> dfu 0 mmc 0                                                                         
generic_phy_get_bulk : no phys property                                                
##DOWNLOAD ... OK                                                                      
Ctrl+C to exit ...                                                                     
#####DOWNLOAD ... OK                                                                   
Ctrl+C to exit ...
####DOWNLOAD ... OK
Ctrl+C to exit ...
Request would exceed designated area!

    2. Host logs

    $ sudo dfu-util -a rootfs -D tisdk-base.ext4
dfu-util 0.9

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2016 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
Opening DFU capable USB device...
ID 0451:6165
Run-time device DFU version 0110
Claiming USB DFU Interface...
Setting Alternate Setting #1 ...
Determining device status: state = dfuIDLE, status = 0
dfuIDLE, continuing
DFU mode device DFU version 0110
Device returned transfer size 4096
Copying data from PC to DFU device
Download	[                         ]   0%            0 bytes failed!
state(10) = dfuERROR, status(14) = Something went wrong, but the device does not know what it was

  • 0 in reply to Saubhik Jaiswal
    TI__Guru 69541 points

    Hi Saubhik,

    The `dfu_alt_info_emmc`, by default, is set to flash rootfs to GPT partition 1. Since you have created the rootfs partition as GPT partition 2, you will have to edit the variable and change the "rootfs part 0 1" to "rootfs part 0 2" to flash Linux EXT4 filesystem.

    Regards,

    Prashant