MPI_L2PCFG_DEVNUM_SHIFT
#define MPI_L2PCFG_DEVNUM_MASK (0x1f << MPI_L2PCFG_DEVNUM_SHIFT)
if (slot > (MPI_L2PCFG_DEVNUM_MASK >> MPI_L2PCFG_DEVNUM_SHIFT))
val |= (slot << MPI_L2PCFG_DEVNUM_SHIFT);