_ALIGN_UP
claim_base = _ALIGN_UP((unsigned long)_end, ONE_MB);
#define _ALIGN(addr,size) _ALIGN_UP(addr,size)
heap_size = _ALIGN_UP(heap_size, granularity);
alloc_tbl = (struct alloc_info *)_ALIGN_UP((unsigned long)base, 8);
heap_base = _ALIGN_UP((unsigned long)alloc_tbl + tbl_size, alloc_min);
size = _ALIGN_UP(size, alloc_min);