tc_pagesize
start += tc_pagesize;
a = addr & ~(tc_pagesize - 1);
end = (addr + size - 1) & ~(tc_pagesize - 1);
a += tc_pagesize;
a = addr & ~(tc_pagesize - 1);
end = (addr + size - 1) & ~(tc_pagesize - 1);
a += tc_pagesize;