include: add new file for cache-related definitions

* include/cache.h (__cacheline_aligned): This macro can be used to
align statically allocated objects so that they start at a cache line.

1 files changed, 25 insertions, 0 deletions

diff --git a/include/cache.h b/include/cache.h
new file mode 100644
index 00000000..6260366a
--- /dev/null
+++ b/include/cache.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (c) 2013 Free Software Foundation.
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _MACH_CACHE_H_
+#define _MACH_CACHE_H_
+
+/* This macro can be used to align statically allocated objects so
+   that they start at a cache line. */
+#define  __cacheline_aligned __attribute__((aligned(1 << CPU_L1_SHIFT)))
+
+#endif /* _MACH_CACHE_H_ */