1 files changed, 14 insertions, 0 deletions

diff --git a/include/asm-mips/barrier.h b/include/asm-mips/barrier.h
index 9d8cfbb5e796..8e9ac313ca3b 100644
--- a/include/asm-mips/barrier.h
+++ b/include/asm-mips/barrier.h
@@ -92,11 +92,25 @@
 #define fast_wmb()      __sync()
 #define fast_rmb()      __sync()
 #define fast_mb()       __sync()
+#ifdef CONFIG_SGI_IP28
+#define fast_iob()                              \
+        __asm__ __volatile__(                   \
+                ".set   push\n\t"               \
+                ".set   noreorder\n\t"          \
+                "lw     $0,%0\n\t"              \
+                "sync\n\t"                      \
+                "lw     $0,%0\n\t"              \
+                ".set   pop"                    \
+                : /* no output */               \
+                : "m" (*(int *)CKSEG1ADDR(0x1fa00004)) \
+                : "memory")
+#else
 #define fast_iob()                              \
         do {                                    \
                 __sync();                       \
                 __fast_iob();                   \
         } while (0)
+#endif
 
 #ifdef CONFIG_CPU_HAS_WB