PHYSMAP_VSIDBITS
#define PHYSMAPN_SEGMENT(s) VSID_MAKE(s, PHYSMAP_VSIDBITS)
pmap_vsid_bitmap[(PHYSMAP_VSIDBITS & (NPMAPS-1)) / VSID_NBPW]
|= 1 << (PHYSMAP_VSIDBITS % VSID_NBPW);
if (hash < PHYSMAP_VSIDBITS)