[U-Boot] [PATCH] dcache: Dcache line size aligned stack buffer allocation

[Lukasz Majewski]

This commit is defining new include/cache.h file, which defines macro
needed for cache aligned buffers.
ALLOC_CACHE_ALIGN_BUFFER shall be used in functions, which are using
stack allocated buffers for DMA transfers.

Signed-off-by: Lukasz Majewski <l.majewski at samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
CC: Albert ARIBAUD <albert.u.boot at aribaud.net>
---
 include/cache.h |   42 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 42 insertions(+), 0 deletions(-)
 create mode 100644 include/cache.h

diff --git a/include/cache.h b/include/cache.h
new file mode 100644
index 0000000..d06a0ac
--- /dev/null
+++ b/include/cache.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2011 Samsung Electronics
+ * Łukasz Majewski <l.majewski at samsung.com>
+ *
+ * Configuation settings for the SAMSUNG Universal (s5pc100) board.
+ *
+ * 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 __GENERIC_CACHE_H_
+#define __GENERIC_CACHE_H_
+
+#if defined(CONFIG_SYS_CACHELINE_SIZE) && !defined(CONFIG_SYS_DCACHE_OFF)
+#define ALIGN_ADDR(addr) ((void *)(((unsigned long) addr + \
+				    CONFIG_SYS_CACHELINE_SIZE - 1)  \
+				   & ~(CONFIG_SYS_CACHELINE_SIZE - 1)))
+
+#define ALLOC_CACHE_ALIGN_BUFFER(type, name, size) \
+	char *__##name[size + CONFIG_SYS_CACHELINE_SIZE]; \
+	type *name = ALIGN_ADDR(__##name);
+#else
+#define ALLOC_CACHE_ALIGN_BUFFER(type, name, size) \
+	type name[size];
+#endif
+
+#endif  /* __GENERIC_CACHE_H_ */
-- 
1.7.2.3