1 files changed, 52 insertions, 0 deletions

diff --git a/arch/tile/include/asm/cache.h b/arch/tile/include/asm/cache.h
new file mode 100644
index 000000000000..f6101840c9e7
--- /dev/null
+++ b/arch/tile/include/asm/cache.h
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2010 Tilera Corporation. All Rights Reserved.
+ *
+ *   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, version 2.
+ *
+ *   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, GOOD TITLE or
+ *   NON INFRINGEMENT.  See the GNU General Public License for
+ *   more details.
+ */
+
+#ifndef _ASM_TILE_CACHE_H
+#define _ASM_TILE_CACHE_H
+
+#include <arch/chip.h>
+
+/* bytes per L1 data cache line */
+#define L1_CACHE_SHIFT          CHIP_L1D_LOG_LINE_SIZE()
+#define L1_CACHE_BYTES          (1 << L1_CACHE_SHIFT)
+
+/* bytes per L2 cache line */
+#define L2_CACHE_SHIFT          CHIP_L2_LOG_LINE_SIZE()
+#define L2_CACHE_BYTES          (1 << L2_CACHE_SHIFT)
+#define L2_CACHE_ALIGN(x)       (((x)+(L2_CACHE_BYTES-1)) & -L2_CACHE_BYTES)
+
+/*
+ * TILE-Gx is fully coherents so we don't need to define
+ * ARCH_KMALLOC_MINALIGN.
+ */
+#ifndef __tilegx__
+#define ARCH_KMALLOC_MINALIGN   L2_CACHE_BYTES
+#endif
+
+/* use the cache line size for the L2, which is where it counts */
+#define SMP_CACHE_BYTES_SHIFT   L2_CACHE_SHIFT
+#define SMP_CACHE_BYTES         L2_CACHE_BYTES
+#define INTERNODE_CACHE_SHIFT   L2_CACHE_SHIFT
+#define INTERNODE_CACHE_BYTES   L2_CACHE_BYTES
+
+/* Group together read-mostly things to avoid cache false sharing */
+#define __read_mostly __attribute__((__section__(".data.read_mostly")))
+
+/*
+ * Attribute for data that is kept read/write coherent until the end of
+ * initialization, then bumped to read/only incoherent for performance.
+ */
+#define __write_once __attribute__((__section__(".w1data")))
+
+#endif /* _ASM_TILE_CACHE_H */