JAZZ_DMA_PAGE_NUM
addr = (segs[i].ds_addr - t->dma_offset) & JAZZ_DMA_PAGE_NUM;
va &= JAZZ_DMA_PAGE_NUM;
pa &= JAZZ_DMA_PAGE_NUM;
pa &= JAZZ_DMA_PAGE_NUM;
(((int)(x) + JAZZ_DMA_PAGE_OFFS) & JAZZ_DMA_PAGE_NUM)