+#ifdef CONFIG_MIPS_MT_SMTC
+ /*
+ * SMTC has an interesting problem that interrupts are level-triggered,
+ * and the CLI macro will clear EXL, potentially causing a duplicate
+ * interrupt service invocation. So we need to clear the associated
+ * IM bit of Status prior to doing CLI, and restore it after the
+ * service routine has been invoked - we must assume that the
+ * service routine will have cleared the state, and any active
+ * level represents a new or otherwised unserviced event...
+ */
+ mfc0 t1, CP0_STATUS
+ and t0, a0, t1
+ mfc0 t2, CP0_TCCONTEXT
+ or t0, t0, t2
+ mtc0 t0, CP0_TCCONTEXT
+ xor t1, t1, t0
+ mtc0 t1, CP0_STATUS
+ _ehb
+#endif /* CONFIG_MIPS_MT_SMTC */