XCTL_HOST_CFG
val = XCTL_RD_8(sc, XCTL_HOST_CFG);
XCTL_WR_8(sc, XCTL_HOST_CFG, val);
val = XCTL_RD_8(sc, XCTL_HOST_CFG);
XCTL_WR_8(sc, XCTL_HOST_CFG, val);
val = XCTL_RD_8(sc, XCTL_HOST_CFG);
XCTL_WR_8(sc, XCTL_HOST_CFG, val);