aboutsummaryrefslogtreecommitdiff
path: root/arch/unicore32/include/asm/barrier.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/unicore32/include/asm/barrier.h')
-rw-r--r--arch/unicore32/include/asm/barrier.h28
1 files changed, 28 insertions, 0 deletions
diff --git a/arch/unicore32/include/asm/barrier.h b/arch/unicore32/include/asm/barrier.h
new file mode 100644
index 00000000000..a6620e5336b
--- /dev/null
+++ b/arch/unicore32/include/asm/barrier.h
@@ -0,0 +1,28 @@
+/*
+ * Memory barrier implementations for PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2012 GUAN Xue-tao
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef __UNICORE_BARRIER_H__
+#define __UNICORE_BARRIER_H__
+
+#define isb() __asm__ __volatile__ ("" : : : "memory")
+#define dsb() __asm__ __volatile__ ("" : : : "memory")
+#define dmb() __asm__ __volatile__ ("" : : : "memory")
+
+#define mb() barrier()
+#define rmb() barrier()
+#define wmb() barrier()
+#define smp_mb() barrier()
+#define smp_rmb() barrier()
+#define smp_wmb() barrier()
+#define read_barrier_depends() do { } while (0)
+#define smp_read_barrier_depends() do { } while (0)
+
+#define set_mb(var, value) do { var = value; smp_mb(); } while (0)
+
+#endif /* __UNICORE_BARRIER_H__ */