include: stdlib: add macro for cache align buffer
Add macro to declare cache aligned buffer in the global
space.
Change-Id: I039ad063932365ecd56629b1775bff532dbcdfe7
diff --git a/include/stdlib.h b/include/stdlib.h
index 7fe5b3d..5c5145a 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -1,6 +1,8 @@
/*
* Copyright (c) 2008 Travis Geiselbrecht
*
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
@@ -48,4 +50,12 @@
#define STACKBUF_DMA_ALIGN(var, size) \
uint8_t __##var[(size) + CACHE_LINE]; uint8_t *var = (uint8_t *)(ROUNDUP((addr_t)__##var, CACHE_LINE))
+/* Macro to allocate buffer in both local & global space, the STACKBUF_DMA_ALIGN cannot
+ * be used for global space.
+ * If we use STACKBUF_DMA_ALIGN 'C' compiler throws the error "Initializer element
+ * is not constant", since global variable need to be initialized with a constant value.
+ */
+#define BUF_DMA_ALIGN(var, size) \
+ static uint8_t var[ROUNDUP(size, CACHE_LINE)] __attribute__((aligned(CACHE_LINE)));
+
#endif