MACB_BFEXT
addr |= MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr));
return MACB_BFEXT(IDNUM, id) >= 0x2;
status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
tmp |= MACB_BFEXT(IP, ifa_local);