SFXGE_TX_DESCMASK
ASSERT((stmp->stm_addr[page] & SFXGE_TX_DESCMASK) != 0);
stmp->stm_addr[n++] = dmac.dmac_laddress & SFXGE_TX_DESCMASK;
DTRACE_PROBE1(addr, uint64_t, dmac.dmac_laddress & SFXGE_TX_DESCMASK);
ASSERT((dmac.dmac_laddress & SFXGE_TX_DESCMASK) != 0);