ARCMSR_MESSAGE_INT_CLEAR_PATTERN
WRITE_CHIP_REG32(0, phbbmu->iop2drv_doorbell, ARCMSR_MESSAGE_INT_CLEAR_PATTERN);
WRITE_CHIP_REG32(0, phbbmu->iop2drv_doorbell, ARCMSR_MESSAGE_INT_CLEAR_PATTERN);/*clear interrupt*/