AE_ISR_REG
val = AE_READ_4(sc, AE_ISR_REG);
AE_WRITE_4(sc, AE_ISR_REG, AE_ISR_DISABLE);
val = AE_READ_4(sc, AE_ISR_REG); /* Read interrupt status. */
AE_WRITE_4(sc, AE_ISR_REG, val | AE_ISR_DISABLE);
AE_WRITE_4(sc, AE_ISR_REG, 0);
AE_WRITE_4(sc, AE_ISR_REG, 0xffffffff);
AE_WRITE_4(sc, AE_ISR_REG, 0xffffffff);
val = AE_READ_4(sc, AE_ISR_REG);
AE_WRITE_4(sc, AE_ISR_REG, 0x3fffffff);
AE_WRITE_4(sc, AE_ISR_REG, 0x0);