LOONGSON2_PM1_STS_REG
u16 status = loongson2_pm_readw(LOONGSON2_PM1_STS_REG);
value = loongson2_pm_readw(LOONGSON2_PM1_STS_REG);
loongson2_pm_writew(value, LOONGSON2_PM1_STS_REG);