+#ifdef CONFIG_MIPS_MT
+/*
+ * Temporary hacks for SMTC debug. Optionally force single-threaded
+ * execution during I-cache flushes.
+ */
+
+#define PROTECT_CACHE_FLUSHES 1
+
+#ifdef PROTECT_CACHE_FLUSHES
+
+extern int mt_protiflush;
+extern int mt_protdflush;
+extern void mt_cflush_lockdown(void);
+extern void mt_cflush_release(void);
+
+#define BEGIN_MT_IPROT \
+ unsigned long flags = 0; \
+ unsigned long mtflags = 0; \
+ if(mt_protiflush) { \
+ local_irq_save(flags); \
+ ehb(); \
+ mtflags = dvpe(); \
+ mt_cflush_lockdown(); \
+ }
+
+#define END_MT_IPROT \
+ if(mt_protiflush) { \
+ mt_cflush_release(); \
+ evpe(mtflags); \
+ local_irq_restore(flags); \
+ }
+
+#define BEGIN_MT_DPROT \
+ unsigned long flags = 0; \
+ unsigned long mtflags = 0; \
+ if(mt_protdflush) { \
+ local_irq_save(flags); \
+ ehb(); \
+ mtflags = dvpe(); \
+ mt_cflush_lockdown(); \
+ }
+
+#define END_MT_DPROT \
+ if(mt_protdflush) { \
+ mt_cflush_release(); \
+ evpe(mtflags); \
+ local_irq_restore(flags); \
+ }
+
+#else
+
+#define BEGIN_MT_IPROT
+#define BEGIN_MT_DPROT
+#define END_MT_IPROT
+#define END_MT_DPROT
+
+#endif /* PROTECT_CACHE_FLUSHES */
+
+#define __iflush_prologue \
+ unsigned long redundance; \
+ extern int mt_n_iflushes; \
+ BEGIN_MT_IPROT \
+ for (redundance = 0; redundance < mt_n_iflushes; redundance++) {
+
+#define __iflush_epilogue \
+ END_MT_IPROT \
+ }
+
+#define __dflush_prologue \
+ unsigned long redundance; \
+ extern int mt_n_dflushes; \
+ BEGIN_MT_DPROT \
+ for (redundance = 0; redundance < mt_n_dflushes; redundance++) {
+
+#define __dflush_epilogue \
+ END_MT_DPROT \
+ }
+
+#define __inv_dflush_prologue __dflush_prologue
+#define __inv_dflush_epilogue __dflush_epilogue
+#define __sflush_prologue {
+#define __sflush_epilogue }
+#define __inv_sflush_prologue __sflush_prologue
+#define __inv_sflush_epilogue __sflush_epilogue
+
+#else /* CONFIG_MIPS_MT */
+
+#define __iflush_prologue {
+#define __iflush_epilogue }
+#define __dflush_prologue {
+#define __dflush_epilogue }
+#define __inv_dflush_prologue {
+#define __inv_dflush_epilogue }
+#define __sflush_prologue {
+#define __sflush_epilogue }
+#define __inv_sflush_prologue {
+#define __inv_sflush_epilogue }
+
+#endif /* CONFIG_MIPS_MT */
+