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T4240 MPIC_WHOAMI INVALID (0x3f)

Question asked by Brian Champlin on Dec 15, 2016
Latest reply on Dec 16, 2016 by Brian Champlin

On my T4240 boards I get the invalid value from the MPIC_WHOAMI register which prevents the required operation of the MPIC_IPIDR# registers.  Secondary CPU cores can signal the boot core but the boot core cannot signal the secondary CPU's.

 

I suspect this is a configuration problem with the MPIC but I have been unable to find adequate details in the T4240RM document to discover how.

 

Has anybody else encountered this problem on T4240 cores?  Is there a suitable work around for core directed interrupts?

 

Thanks

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