• State Answer Suggested
  • Locked Locked
  • Replies 2 replies
  • Answers 1 answer
  • Subscribers 101 subscribers
  • Views 326 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

AM625: Question about booting from SD card

Karan Saxena
Guru* 78155 points

Part Number: AM625

Tool/software:

Posting on behalf of

I have a question regarding booting a AM625SIP from SD card in filesystem mode. I have a binary disk image which boots fine from SD card. However, the same bootloader binary doesn't boot from an image I created myself. I suspect there might be some differences in the partitioning. Is there some information available how the ROM handles the partition table?

  1. Can the ROM boot from GPT partitions and if yes, does the partition need some specific GUID?
  2. Which partition does the ROM boot from? The first one?
  3. In case of MSDOS partition tables, does the partition table need some specific CHS layout or does it take the LBA entries only?
  • 0
    TI__Guru* 86331 points

    The ROM only supports booting from a bootable FAT logical partition in the MSDOS partition table. There could be any number of FAT partitions. However, the ROM would boot from the one which has the bootable flag.

    For the custom created image, please share the output of the `fdisk -l` command like so:

    ❯ fdisk -l tisdk-default-image-am64xx-evm.wic
Disk tisdk-default-image-am64xx-evm.wic: 7.73 GiB, 8301972480 bytes, 16214790 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: 0x3a4a99a8
                                                                                                                                                                                        
Device                              Boot  Start      End  Sectors  Size Id Type
tisdk-default-image-am64xx-evm.wic1 *      2048   264191   262144  128M  c W95 FAT32 (LBA)
tisdk-default-image-am64xx-evm.wic2      264192 16214789 15950598  7.6G 83 Linux

    Thanks!

  • 0 in reply to Prashant Shivhare
    Prodigy 70 points

    Hi Prashant,

    It seems while retesting I've done something correct now. It now works for me. Thanks for clarifying that the ROM indeed can't boot from a GPT partitioned device.