DIRECT_MAP_PHYSMEM_END
#define DIRECT_MAP_PHYSMEM_END __pa(PAGE_END - 1)
# define DIRECT_MAP_PHYSMEM_END direct_map_physmem_end
# define DIRECT_MAP_PHYSMEM_END ((1ULL << MAX_PHYSMEM_BITS) - 1)
# define DIRECT_MAP_PHYSMEM_END (((phys_addr_t)-1)&~(1ULL<<63))