loongson2_pm_readw
u16 status = loongson2_pm_readw(LOONGSON2_PM1_STS_REG);
value = loongson2_pm_readw(LOONGSON2_PM1_STS_REG);
value = loongson2_pm_readw(LOONGSON2_PM1_CNT_REG);
value = loongson2_pm_readw(LOONGSON2_PM1_ENA_REG);