PRID_COMP_LEGACY
int comp = (prid & PRID_COMP_MASK) != PRID_COMP_LEGACY;
case PRID_COMP_LEGACY:
case PRID_COMP_LEGACY | PRID_IMP_R3000:
case PRID_COMP_LEGACY | PRID_IMP_R2000:
if ((boot_cpu_data.processor_id & PRID_COMP_MASK) == PRID_COMP_LEGACY)
case PRID_COMP_LEGACY: