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Original question:

AM6442: How to find the DDR frequency path

AM6442: Checking DDR Memory Information on AM6442

Honnesh Babu Nagabhushana
Prodigy 160 points
Part Number: AM6442


Tool/software:

Hello TI,

I am working with the AM6442 platform and would like to check the DDR memory information.

Could you please guide me on the available methods or commands to retrieve DDR memory details in both U-Boot and Linux?

Additionally, if there are any specific debugging tools available.

Regards

Honnesh

  • +1
    TI__Guru**** 171821 points

    Hi Honnesh,

    I am not sure what DDR memory information you want to know. U-Boot has command 'bdinfo' telling some DDR basics. Linux has command 'free' telling memory usage.

    Linux has a program "memtester" which can be used to validate DDR.

  • +1 in reply to Bin Liu
    Prodigy 160 points

    Hi Bin,

    In AM6442

    I checked bdinfo in U-Boot, but it doesn’t show DDR memory information details like total size, type (DDR3/DDR4, etc.), speed, and other specifications. Could you please suggest how to retrieve this information?

    Additionally, I want to test DDR using memtester in Linux but don’t know how to do it. Could you please provide the complete command to execute it along with an example output?

    Please resolve the issues

    Regards

    Honnesh

  • 0 in reply to Honnesh Babu Nagabhushana
    Prodigy 160 points

    Hi Bin,

    How to resolve the issues

    Regards

    Honnesh

  • 0 in reply to Honnesh Babu Nagabhushana
    TI__Guru**** 171821 points

    Hi Honnesh,

    bdinfo command tells the size of each DDR bank, so you should be easily get the total DDR size. I am not aware of any commend to tell DDR type or speed. You might be able to poke them from the DDR controller registers, but I don't have the detail. You suppose to know the DDR config used in a design, why do you want to know this information at Linux runtime?

    You can run memtester like:

    # memtester 32M