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machine check exception after generating multi bit error  (MPC5777C) while testing SRAM

Question asked by Manaswini lalitha on Aug 10, 2019
Latest reply on Aug 12, 2019 by Peter Vlna

Hi

I've been working on EIM_ERM module lately. I could see that a machine check exception occurs after generating a multi bit error. Although I've tried to handle the exception by writing a logic which instructs to move to next instrcution. Surprisingly,the next instruction also goes into handler and then the process repeats.I tried disabling the global enable and bit in EIMCR also. Below is the handler:

 

void machine_exception(VectorId vector,const void *stack_ptr)
{
MPC::ErrorInjectionModule eim(0xFFF64000UL);

Uint32 new_xsrr0 = 0UL;
eim.disable_injection();
new_xsrr0 = get_xsrr0((Uint32 *)stack_ptr, std_context_size) + 4UL;
set_xsrr0((Uint32 *)stack_ptr, std_context_size, new_xsrr0);
return;
}

PFA of the registers after exception has occured

Kindly let me know if I am going wrong somewhere.

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