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author | Marc Kleine-Budde <mkl@pengutronix.de> | 2012-06-20 13:57:33 +0200 |
---|---|---|
committer | Sascha Hauer <s.hauer@pengutronix.de> | 2012-06-30 12:46:25 +0200 |
commit | f98ebf91d624f0cb0f85105a0e67aee0078aa58b (patch) | |
tree | 15d533b003206a8a9f32052495d1df2c3b8aaee2 /arch | |
parent | 74b3f12a2501da52be663da71c1284672ba3f4e7 (diff) | |
download | barebox-f98ebf91d624f0cb0f85105a0e67aee0078aa58b.tar.gz barebox-f98ebf91d624f0cb0f85105a0e67aee0078aa58b.tar.xz |
ARM mmu: add dma_alloc
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.
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch')
-rw-r--r-- | arch/arm/include/asm/dma.h | 8 | ||||
-rw-r--r-- | arch/arm/include/asm/mmu.h | 13 |
2 files changed, 19 insertions, 2 deletions
diff --git a/arch/arm/include/asm/dma.h b/arch/arm/include/asm/dma.h new file mode 100644 index 0000000000..cb9cd1b4ea --- /dev/null +++ b/arch/arm/include/asm/dma.h @@ -0,0 +1,8 @@ +/* + * Copyright (C) 2012 by Marc Kleine-Budde <mkl@pengutronix.de> + * + * 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 f5ae7a823a..a66da8c0a8 100644 --- a/arch/arm/include/asm/mmu.h +++ b/arch/arm/include/asm/mmu.h @@ -1,9 +1,12 @@ #ifndef __ASM_MMU_H #define __ASM_MMU_H -#include <asm/pgtable.h> -#include <malloc.h> +#include <common.h> #include <errno.h> +#include <malloc.h> +#include <xfuncs.h> + +#include <asm/pgtable.h> #define PMD_SECT_DEF_UNCACHED (PMD_SECT_AP_WRITE | PMD_SECT_AP_READ | PMD_TYPE_SECT) #define PMD_SECT_DEF_CACHED (PMD_SECT_WB | PMD_SECT_DEF_UNCACHED) @@ -23,6 +26,12 @@ static inline void setup_dma_coherent(unsigned long offset) { } +#define dma_alloc dma_alloc +static inline void *dma_alloc(size_t size) +{ + return xmemalign(64, ALIGN(size, 64)); +} + #ifdef CONFIG_MMU void *dma_alloc_coherent(size_t size); void dma_free_coherent(void *mem, size_t size); |