ERRCTL_L2P
errctl &= ~(ERRCTL_PE|ERRCTL_L2P);
write_c0_errctl(errctl|ERRCTL_L2P);
l2parity_present = (read_c0_errctl() & ERRCTL_L2P);
errctl |= ERRCTL_L2P;
errctl |= ERRCTL_L2P;
errctl ^= ERRCTL_L2P;
str_enabled_disabled(errctl & ERRCTL_L2P));