LOONGARCH_CPUCFG1
c->pabits = (read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_PABITS) >> 4;
c->vabits = (read_cpucfg(LOONGARCH_CPUCFG1) & CPUCFG1_VABITS) >> 12;
config = read_cpucfg(LOONGARCH_CPUCFG1);
case LOONGARCH_CPUCFG1:
case LOONGARCH_CPUCFG1: