ISP_PAGE_OFFSET
#define ISP_PAGE_SIZE BIT(ISP_PAGE_OFFSET)
#define pgnr_to_size(pgnr) ((pgnr) << ISP_PAGE_OFFSET)
#define size_to_pgnr_ceil(size) (((size) + (1 << ISP_PAGE_OFFSET) - 1)\
>> ISP_PAGE_OFFSET)
#define size_to_pgnr_bottom(size) ((size) >> ISP_PAGE_OFFSET)
end = start + (pgnr << ISP_PAGE_OFFSET);
end = start + (pgnr << ISP_PAGE_OFFSET);
pgnr = (end - start) >> ISP_PAGE_OFFSET;
return phys >> ISP_PAGE_OFFSET;
return (phys_addr_t)((pte & ~mask) << ISP_PAGE_OFFSET);