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TDA4VM: DMSC ROM and MCU R5 ROM

user6597813
Prodigy 10 points
Part Number: TDA4VM

Hi, expert

I use tda4, have some questions.

1. Tda4 has MCU ROM code and DMSC ROM code, the ROM code solidified into the soc? or need burn it manually ?

2.  I study tda4 boot flow, but can not find out how DMSC and  MCU communicate(red circle),please help me.

 

reference:https://git.ti.com/cgit/ti-u-boot/ti-u-boot/tree/board/ti/j721e/README?h=ti-u-boot-2021.01

  • 0
    TI__Guru** 110395 points

    1、ROM code一般出厂的时候都固化好了。

    2、我确认一下再给您回复

  • 0
    TI__Guru** 110395 points
    user6597813 说：
    how DMSC and  MCU communicate(red circle),

    请查看以下回复：

    1) MCU R5 RoM makes use of DMSC RoM services via Secure proxy IPC to authenticate tiboot3.bin & loads on to itself.

    2) R5 SPL fetches the sysfw.itb from the boot media & loads the sysfw tifs binary to DMSC. U-Boot directory file: arch/arm/mach-k3/sysfw-loader.c & function k3_sysfw_loader.

    3) The R5 SPL then extracts the board config data from the sysfw.itb. k3_sysfw_configure_using_fit function in arch/arm/mach-k3/sysfw-loader.c extracts the various config data and implements it.

    4) Finally the R5 SPL loads the ATF(ARM trusted firmware) to 0x70000000 & brings the A72 out of reset & A73 starts executing.

    如果您没有其它问题请帮忙确认答案，谢谢。

  • 0 回复 Nancy Wang
    Prodigy 30 points

    感谢回复！

  • 0 回复 user6600224
    TI__Guru** 110395 points

    不客气，如果您没有其它问题请帮忙确认答案，我会将此贴关闭，谢谢！