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Original question:

[FAQ] TDA4VM: how to load MAIN core images from eMMC with boot_app

TDA4VM: TDA4 boot

zhangsc sunchuan
Intellectual 340 points
Part Number: TDA4VM


Hi,

I want to ask some question about TDA4 boot.My sdk is  V7_01

as you know,

mehtod 1 :   we can load mcu1_0  through A72 UBoot(tiboot3.bin  tispl.bin u-boot.img sysfw ),and load other core firmware .

mehtod 2 :  also,we can load mcu1_0 through  SBL,it can quickly response can.

My question   is 

1,  CAN quilcyly responese aslo  can do  in mehtod 1,when load mcu1_0  in the uboot  ,and i found other core can work maybe more quickly. 

why need sbl start,Is it has some reason.

2, In my last product,TI suggest which boot way.

  • 0
    TI__Guru** 123551 points

    As you have mentioned there are two available boot flows provided by the J7 SDK:

    Additional documentation the flows are available at SBL and SPL.

    By default SBL is more likely to boot faster than SPL, as SBL contains less features, however, either boot flow can be customized to meet requirements.   Providing a recommendation on which boot flow is more appropriate is not possible without a full understanding of the product, including, but not restricted to, early boot metrics, image sizes, filesystem, and boot media that are being used.    

    Please follow up with your local TI representative, for assistance with this.   

    Regards,

    kb

  • 0
    Intellectual 340 points

    HI,thanks!

    in the method1,I dont found  about  the funtion X509 module, Is it  necessity to boot  through  it? can I  think SBL boot  more secure ,but it will  lower the speed because mcu  read file is slow compare to A72 UBOOT readfile. I find sbl  copy  file  & mutiproc  core  is at  least 10s, and LINUX  kernel is  start too  long.

      

  • 0 in reply to zhangsc sunchuan
    TI__Guru** 123551 points

    The X509 certificate is required for TDA4VM HS - High Security devices, it is not required for TDA4VM GP - general purpose devices.

    Regards,

    kb

  • 0 in reply to KB
    Intellectual 340 points

    thank you!

    another, as you know VSDSK7.1  is not support  SBL from EMMC, which version  support SBL from EMMC.

  • 0 in reply to zhangsc sunchuan
    TI__Guru** 123551 points

    Please open a new thread for the new topic.

    Thanks in advance,

    Regards,

    kb