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-rw-r--r--include/asm-mips/barrier.h14
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