at_xdmac_read
while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
imr = at_xdmac_read(atxdmac, AT_XDMAC_GIM);
status = at_xdmac_read(atxdmac, AT_XDMAC_GIS);
while (at_xdmac_read(atxdmac, AT_XDMAC_GS) & atchan->mask)
atxdmac->save_gim = at_xdmac_read(atxdmac, AT_XDMAC_GIM);
atxdmac->save_gs = at_xdmac_read(atxdmac, AT_XDMAC_GS);
while (at_xdmac_read(atxdmac, AT_XDMAC_GS))