From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/unicore32/include/asm/cache.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 arch/unicore32/include/asm/cache.h

(limited to 'arch/unicore32/include/asm/cache.h')

diff --git a/arch/unicore32/include/asm/cache.h b/arch/unicore32/include/asm/cache.h
new file mode 100644
index 00000000..ad8f795d
--- /dev/null
+++ b/arch/unicore32/include/asm/cache.h
@@ -0,0 +1,27 @@
+/*
+ * linux/arch/unicore32/include/asm/cache.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 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_CACHE_H__
+#define __UNICORE_CACHE_H__
+
+#define L1_CACHE_SHIFT		(5)
+#define L1_CACHE_BYTES		(1 << L1_CACHE_SHIFT)
+
+/*
+ * Memory returned by kmalloc() may be used for DMA, so we must make
+ * sure that all such allocations are cache aligned. Otherwise,
+ * unrelated code may cause parts of the buffer to be read into the
+ * cache before the transfer is done, causing old data to be seen by
+ * the CPU.
+ */
+#define ARCH_DMA_MINALIGN	L1_CACHE_BYTES
+
+#endif
-- 
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