get_hblk_span
endaddr = base + get_hblk_span(old);
ASSERT(get_hblk_span(hmeblkp) == HMEBLK_SPAN(size));
get_hblk_span(hmeblkp));
caddr_t eva = sva + get_hblk_span(hmeblkp); \
((caddr_t)(get_hblk_base(hmeblkp) + get_hblk_span(hmeblkp)))
get_hblk_span(hmeblkp))))