+#else /* SMTC versions that manage MT scheduling */
+
+#include <asm/interrupt.h>
+
+/*
+ * This is a duplicate of dmt() in mipsmtregs.h to avoid problems with
+ * header file recursion.
+ */
+static inline unsigned int __dmt(void)
+{
+ int res;
+
+ __asm__ __volatile__(
+ " .set push \n"
+ " .set mips32r2 \n"
+ " .set noat \n"
+ " .word 0x41610BC1 # dmt $1 \n"
+ " ehb \n"
+ " move %0, $1 \n"
+ " .set pop \n"
+ : "=r" (res));
+
+ instruction_hazard();
+
+ return res;
+}
+
+#define __VPECONTROL_TE_SHIFT 15
+#define __VPECONTROL_TE (1UL << __VPECONTROL_TE_SHIFT)
+
+#define __EMT_ENABLE __VPECONTROL_TE
+
+static inline void __emt(unsigned int previous)
+{
+ if ((previous & __EMT_ENABLE))
+ __asm__ __volatile__(
+ " .set noreorder \n"
+ " .set mips32r2 \n"
+ " .word 0x41600be1 # emt \n"
+ " ehb \n"
+ " .set mips0 \n"
+ " .set reorder \n");
+}
+
+static inline void __ehb(void)
+{
+ __asm__ __volatile__(
+ " ehb \n");
+}
+
+/*
+ * Note that local_irq_save/restore affect TC-specific IXMT state,
+ * not Status.IE as in non-SMTC kernel.
+ */
+
+#define __BUILD_SET_C0(name) \
+static inline unsigned int \
+set_c0_##name(unsigned int set) \
+{ \
+ unsigned int res; \
+ unsigned int omt; \
+ unsigned int flags; \
+ \
+ local_irq_save(flags); \
+ omt = __dmt(); \
+ res = read_c0_##name(); \
+ res |= set; \
+ write_c0_##name(res); \
+ __emt(omt); \
+ local_irq_restore(flags); \
+ \
+ return res; \
+} \
+ \
+static inline unsigned int \
+clear_c0_##name(unsigned int clear) \
+{ \
+ unsigned int res; \
+ unsigned int omt; \
+ unsigned int flags; \
+ \
+ local_irq_save(flags); \
+ omt = __dmt(); \
+ res = read_c0_##name(); \
+ res &= ~clear; \
+ write_c0_##name(res); \
+ __emt(omt); \
+ local_irq_restore(flags); \
+ \
+ return res; \
+} \
+ \
+static inline unsigned int \
+change_c0_##name(unsigned int change, unsigned int new) \
+{ \
+ unsigned int res; \
+ unsigned int omt; \
+ unsigned int flags; \
+ \
+ local_irq_save(flags); \
+ \
+ omt = __dmt(); \
+ res = read_c0_##name(); \
+ res &= ~change; \
+ res |= (new & change); \
+ write_c0_##name(res); \
+ __emt(omt); \
+ local_irq_restore(flags); \
+ \
+ return res; \
+}
+#endif
+