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-rw-r--r--arch/x86/include/asm/cache.h51
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diff --git a/arch/x86/include/asm/cache.h b/arch/x86/include/asm/cache.h
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+++ b/arch/x86/include/asm/cache.h
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+/*
+ * Copyright (c) 2011 The Chromium OS Authors.
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ */
+
+#ifndef __X86_CACHE_H__
+#define __X86_CACHE_H__
+
+/*
+ * If CONFIG_SYS_CACHELINE_SIZE is defined use it for DMA alignment. Otherwise
+ * use 64-bytes, a safe default for x86.
+ */
+#ifdef CONFIG_SYS_CACHELINE_SIZE
+#define ARCH_DMA_MINALIGN CONFIG_SYS_CACHELINE_SIZE
+#else
+#define ARCH_DMA_MINALIGN 64
+#endif
+
+static inline void wbinvd(void)
+{
+ asm volatile ("wbinvd" : : : "memory");
+}
+
+static inline void invd(void)
+{
+ asm volatile("invd" : : : "memory");
+}
+
+/* Enable caches and write buffer */
+void enable_caches(void);
+
+/* Disable caches and write buffer */
+void disable_caches(void);
+
+#endif /* __X86_CACHE_H__ */
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