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Software Application Development Linux kernel does not boot  successfully when reset, only on board power cycle.
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Linux kernel does not boot  successfully when reset, only on board power cycle.

Former Member
Former Member over 13 years ago

Hello,

If the board is power cycled, it boots the kernel successfully.

If then the PS-RST button is hit, u-boot loads and starts kernel, but it does not boot successfully.

It seems that the CPU is not reset properly by reset, only by power cycle.

I tried to debug down this and it turns out that the boot stops in the xilinx_dma.c:xilinx_dma_reset(). If I comment out its body, the booting continues further, but it again stops in i2c-xiic.c:xiic_reinit(). Again if body commented out booting continues, but stop later. Here I stopped debugging.

Has anybody experienced such behavior pushing the reset button?

Are there any suggestions or explanations (kernel bug, chip bug, etc.)?

P.S. for the test I build and test the Digilent kernel source three.

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  • Former Member
    0 Former Member over 13 years ago

    Here is the official Digilent statement:
    Hi, Tito,

    The PS-RST button on ZedBoard not only resets the PS system,
    But clears the hardware design in PL system as well.
    Unfortunately the bit file won't get loaded automatically after the reset.

    As a result, the kernel hangs because it is supposed to access some peripheral implemented in PL.

    So, I regret to say that, at this moment, we can only reset the board with the board power switch.

    We will figure some way to walk around the issue in the future.
    Thanks.

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  • armfoxy
    0 armfoxy over 11 years ago in reply to Former Member

    Is that problem solved now?


    Many thanks and greetings
    Zynqfan

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  • armfoxy
    0 armfoxy over 11 years ago in reply to Former Member

    Is that problem solved now?


    Many thanks and greetings
    Zynqfan

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