[U-Boot] [PATCH 1/2] common.h: Introduce DEFINE_CACHE_ALIGN_BUFFER

[Marek Vasut <marex@denx.de>]

This is the out-of-function-scope counterpart of
ALLOC_CACHE_ALIGN_BUFFER.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Tom Rini <trini@ti.com>
Cc: Ilya Yanok <ilya.yanok@cogentembedded.com>
---
 include/common.h |   11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/include/common.h b/include/common.h
index 17c64b0..06d278f 100644
--- a/include/common.h
+++ b/include/common.h
@@ -965,6 +965,17 @@ int cpu_release(int nr, int argc, char * const argv[]);
 									\
 	type *name = (type *) ALIGN((uintptr_t)__##name, ARCH_DMA_MINALIGN)
 
+/*
+ * DEFINE_CACHE_ALIGN_BUFFER() is similar to ALLOC_CACHE_ALIGN_BUFFER, but it's
+ * purpose is to allow allocating aligned buffers outside of function scope.
+ * Usage of this macro shall be avoided or used with extreme care!
+ */
+#define DEFINE_CACHE_ALIGN_BUFFER(type, name, size)			\
+	static char __##name[roundup(size * sizeof(type), ARCH_DMA_MINALIGN)] \
+			__aligned(ARCH_DMA_MINALIGN);			\
+									\
+	static type *name = (type *)__##name;
+
 /* Pull in stuff for the build system */
 #ifdef DO_DEPS_ONLY
 # include <environment.h>
-- 
1.7.10.4