ray_cmd_rx
pktlen = SRAM_READ_FIELD_2(sc, ccs, ray_cmd_rx, c_pktlen);
siglev = SRAM_READ_FIELD_1(sc, ccs, ray_cmd_rx, c_siglev);
bufp = SRAM_READ_FIELD_2(sc, ccs, ray_cmd_rx, c_bufp);
len = SRAM_READ_FIELD_2(sc, ccs, ray_cmd_rx, c_len);
ni = SRAM_READ_FIELD_1(sc, ccs, ray_cmd_rx, c_nextfrag);
ni = SRAM_READ_FIELD_1(sc, ccs, ray_cmd_rx, c_nextfrag);