dma_alloc() allocates memory aligned to cache lines. We have to use
cache line aligned buffers if a driver calls dma_inv_range on the
buffer. Add dma_free() for documentation reasons, too.
Signed-off-by: Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
---
arch/arm/include/asm/dma.h | 8 ++++++++
arch/arm/include/asm/mmu.h | 10 ++++++++++
2 files changed, 18 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/include/asm/dma.h
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h
new file mode 100644
index 0000000..cb9cd1b
--- /dev/null
+++ b/arch/arm/include/asm/dma.h
@@ -0,0 +1,8 @@
+/*
+ * Copyright (C) 2012 by Marc Kleine-Budde <mkl@xxxxxxxxxxxxxx>
+ *
+ * This file is released under the GPLv2
+ *
+ */
+
+#include <asm/mmu.h>
diff --git a/arch/arm/include/asm/mmu.h b/arch/arm/include/asm/mmu.h
index f5ae7a8..cc3529f 100644
--- a/arch/arm/include/asm/mmu.h
+++ b/arch/arm/include/asm/mmu.h
@@ -23,6 +23,16 @@ static inline void setup_dma_coherent(unsigned long offset)
{
}
+static inline void *dma_alloc(size_t size)
+{
+ return xmemalign(64, size);
+}
+
+static inline void dma_free(void *mem)
+{
+ free(mem);
+}
+
#ifdef CONFIG_MMU
void *dma_alloc_coherent(size_t size);
void dma_free_coherent(void *mem, size_t size);
--
1.7.4.1
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