eth_pio_read
eth_pio_read(pktoff, (char *)&pkthdr, 4);
eth_pio_read(pktoff, p, frag);
eth_pio_read(pktoff, p, len);
eth_pio_read(8192, testbuf, sizeof(test));
eth_pio_read(16384, testbuf, sizeof(test));
eth_pio_read(0, romdata, sizeof(romdata));