write_c0_diag
write_c0_diag(LOONGSON_DIAG_ITLB | LOONGSON_DIAG_DTLB |
write_c0_diag(new_diag);
write_c0_diag(diag);
write_c0_diag(LOONGSON_DIAG_ITLB);
write_c0_diag(LOONGSON_DIAG_ITLB | LOONGSON_DIAG_DTLB);