CSR_HVIPRIO1
nacl_csr_write(nsh, CSR_HVIPRIO1, csr->hviprio1);
csr_write(CSR_HVIPRIO1, csr->hviprio1);
csr->hviprio1 = nacl_csr_read(nsh, CSR_HVIPRIO1);
csr->hviprio1 = csr_read(CSR_HVIPRIO1);
hviprio = ncsr_read(CSR_HVIPRIO1);
hviprio = ncsr_read(CSR_HVIPRIO1);
ncsr_write(CSR_HVIPRIO1, hviprio);
csr_write(CSR_HVIPRIO1, 0x0);