ETH__LLBIT
#define HSH_V ETH__LLBIT(0) /* Entry is valid */
#define HSH_S ETH__LLBIT(1) /* Skip this entry */
#define HSH_RD ETH__LLBIT(2) /* Receive(1) / Discard (0) */
#define HSH_R ETH__LLBIT(2) /* Receive(1) */
#define ETH__LLMASK(bit) (ETH__LLBIT(bit) - 1)