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Release single ARM core from reset ....

peter.loof
Prodigy 60 points
Other Parts Discussed in Thread: 66AK2H12

Hello support,

In post ARM kernel not executing Linux, a step-by-step description was added to describe how an executing ARM core could start a non-executing ARM core.

Here is what I have done, when trying to start Core 3 in a 66ak2h12 system:

1. Download a "blob" to address 0x0c50 0000 (small SW < 3000 byte, working fine when downloaded and executed with help of the debugger).

2. Write to boot magical address (write 0x0c50 0000 to address 0x0c5a d00c).

3. Generate a IPC-interrupt (write 1 to address 0x0262 026c).

At this point, I don't get the SW to start,

In the above post, a fourth step was described: Take the core out of reset

I have tried to understand how this can be done, but I can't find how!. Can you please help me find this information?


Thank You,

/Peter Lööf

  • 0
    TI__Guru* 81335 points

    Hi,

    Please take a look at the boot monitor code.That can help you to understand.

    Also refer below thread,

    http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/364152.aspx

    Thank you.

  • 0 in reply to Raja
    Prodigy 60 points

    Hello Rajasekaran K,

    I found out that if I don't start the ARM core with u-boot, instead using the PP module activating the ARM Core from Linux, then everything works as I want (with Power On command as the last action).

    It is however not possible to put the ARM core in Power Off. PD_CPU3_PDSTAT (status register) indicates "Domain in transition", but I guess that the reason for this is that I have a debugger connected.

    Thanks,

    /Peter