SYNC_DESC_4_OFFSET
d->d_pa = vtophys((vaddr_t)d) + SYNC_DESC_4_OFFSET;
#define SYNC_DESC_4_SIZE (sizeof(struct aau_desc_4) - SYNC_DESC_4_OFFSET)
cpu_dcache_wbinv_range(((vaddr_t)(d)) + SYNC_DESC_4_OFFSET, (size))