__PAGE_OFFSET
#define __PAGE_OFFSET (0) /* bootloader uses physical addresses */
#define __PAGE_OFFSET __PAGE_OFFSET_DEFAULT
#define __PAGE_OFFSET __identity_base
#undef __PAGE_OFFSET
#define __PAGE_OFFSET __PAGE_OFFSET_BASE
#define __PAGE_OFFSET __PAGE_OFFSET_BASE
#define __PAGE_OFFSET page_offset_base