RTW_TCR
tcr = RTW_READ(regs, RTW_TCR);
RTW_WRITE(regs, RTW_TCR, tcr);
RTW_SYNC(regs, RTW_TCR, RTW_TCR);
PRINTREG32(regs, RTW_TCR);
tcr = RTW_READ(regs, RTW_TCR);
RTW_WRITE(regs, RTW_TCR, tcr);
RTW_SYNC(regs, RTW_TCR, RTW_TCR);
RTW_WBW(regs, RTW_CR, RTW_TCR);