HS_CSR_LOO
if ((hs_csr & HS_CSR_LOO) != HS_CSR_LOO) {
hs_csr |= HS_CSR_LOO;
if (hs_csr & HS_CSR_LOO) {
hs_csr &= ~HS_CSR_LOO;
hs_csr |= HS_CSR_LOO;
hs_csr &= ~HS_CSR_LOO;