__get_physmem_range
__get_physmem_range(nranges - 1, &range_start, &range_end, false);
for (i = 0; !__get_physmem_range(i, p_start, p_end, false); i++)
for (i = 0; !__get_physmem_range(i, p_start, p_end, true); i++)