EXI_NUM_CHAN
for (chan = 0; chan < EXI_NUM_CHAN; chan++) {
for (chan = 0; chan < EXI_NUM_CHAN; chan++) {
#define ASSERT_CHAN_VALID(chan) KASSERT((chan) >= 0 && (chan) < EXI_NUM_CHAN)
struct exi_channel sc_chan[EXI_NUM_CHAN];