pdcproc_iodc_read
error = pdcproc_iodc_read(nhm.hm_hpa, IODC_DATA, NULL,
error = pdcproc_iodc_read(nhm.hm_hpa, IODC_DATA, NULL, &nhm.hm_pir,
error = pdcproc_iodc_read(hm.hm_hpa, IODC_DATA, NULL,
int pdcproc_iodc_read(hppa_hpa_t, int, int *, struct pdc_iodc_read *, size_t,