AR_KEYTABLE_MAC1
REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), 0);
REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | AR_KEYTABLE_VALID);
REG_WRITE(ah, AR_KEYTABLE_MAC1(micentry), 0);
uint32_t val = REG_READ(ah, AR_KEYTABLE_MAC1(entry));