XS100_8390_DATA_AREA_SIZE
while (count > XS100_8390_DATA_AREA_SIZE) {
XS100_8390_DATA_AREA_SIZE);
src += XS100_8390_DATA_AREA_SIZE;
count -= XS100_8390_DATA_AREA_SIZE;
while (count > XS100_8390_DATA_AREA_SIZE) {
XS100_8390_DATA_AREA_SIZE);
dst += XS100_8390_DATA_AREA_SIZE;
count -= XS100_8390_DATA_AREA_SIZE;