RTEMS | Arm PMSA improvements (!287)

[Sebastian Huber (@sebhub)]

Sebastian Huber started a new discussion on cpukit/score/cpu/arm/include/rtems/score/armv7-pmsa.h: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/287#note_114265

 > +  uint32_t rsr;
 > +
 > +  if (index >= region_count) {
 > +    return false;
 > +  }
 > +
 > +  _ARMV7_Write_rgnr(ARMV7_RGNR_REGION(index));
 > +  _ARM_Instruction_synchronization_barrier();
 > +
 > +  rsr = _ARMV7_Read_drsr();
 > +
 > +  if ((rsr & ARMV7_RSR_EN) == 0) {
 > +    return true;
 > +  }
 > +
 > +  return false;

I would simplify this to `return (_ARMV7_Read_drsr() & ARMV7_RSR_EN) == 0;`.

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/287#note_114265
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