AES_REG_IV
omap_aes_write_n(dd, AES_REG_IV(dd, 0), (void *)dd->req->iv, 4);
omap_aes_write_n(dd, AES_REG_IV(dd, 0), (u32 *)rctx->iv, 4);
((u32 *)ivbuf)[i] = omap_aes_read(dd, AES_REG_IV(dd, i));