SWI exception handling

I was porting the I2C_eeprom_armL137 QuickStart example to a SYS/BIOS project (6.41.0.26).  In init_OMAPL137 there's  a _call_swi(ARM_PRIV_MODE_KEY); function call. This causes the SWI exception as expected, then while it's processing the exception, an illegal instruction exception is taken on this instruction:         mrc     p15, #0, r12, c6, c0, #2 ; read IFAR into r12 in the assembler function ti_sysbios_family_arm_exc_Exception_excHandlerAsm__I.  From there the CPU is in an infinite loop, as the         mrc     p15, #0, r12, c6, c0, #2 ; read IFAR into r12 instruction is also a part of the illegal instruction handling.  What gives?!?!  This just can't be right.... Is there some initialization I must be missing???

Thanks.

Steve