IGC_TCTL
wr32(IGC_TCTL, IGC_TCTL_PSP);
{ IGC_TCTL, 1, SET_READ_TEST, 0xFFFFFFFF, 0x00000000 },
{IGC_TCTL, "TCTL"},
regs_buff[28] = rd32(IGC_TCTL);
tctl = rd32(IGC_TCTL);
wr32(IGC_TCTL, tctl);
tctl = rd32(IGC_TCTL);
wr32(IGC_TCTL, tctl);
tctl = rd32(IGC_TCTL);
wr32(IGC_TCTL, tctl);