MASTER_PRES_MASK
#define MASTER_PRES_MAX MASTER_PRES_MASK
pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;
pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;
pres = (val >> master->layout->pres_shift) & MASTER_PRES_MASK;