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How to bring secondary CPU1 on ARM v7

Atul

Hi,

I am trying to bring up CPU1 on ARM v7 architecture  (assume CPU0 already bring up & set c-environment)

using below code, but it hitting with error: "stack smashing detected"

ldr  sp, =cpu1_stack

b start_task2

* cpu1_stack define here :

int new_stack[1024]__attribute__ ((aligned(16)))   

I used PSCI framework to switch to cpu1

Please share some pointers/inputs whats going wrong here.

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  • 0 Arm Employee Badge in reply to Jens Bauer
    However, if Peter happens to see this, I'm quite sure he would be able to give a more helpful answer

    No pressure

    To get the current CPU ID you'll need to use some assembler to access the System Control co-processor. You don't say what CPU you are using, but assuming some form of ARMv7A CortexA core you'll need to look at the bottom two bits of the Multiprocessor Affinity Register.

    For ARM-v7 32-bit code see: ARM Information Center

    For ARMv8 64-bit code see: ARM Information Center

    HTH,
    Pete

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  • 0 Arm Employee Badge in reply to Jens Bauer
    However, if Peter happens to see this, I'm quite sure he would be able to give a more helpful answer

    No pressure

    To get the current CPU ID you'll need to use some assembler to access the System Control co-processor. You don't say what CPU you are using, but assuming some form of ARMv7A CortexA core you'll need to look at the bottom two bits of the Multiprocessor Affinity Register.

    For ARM-v7 32-bit code see: ARM Information Center

    For ARMv8 64-bit code see: ARM Information Center

    HTH,
    Pete

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