AcoSail/kernel_optimize_test
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bfin: add 32M, 16M and 8M uncached DMA region options

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We need larger DMA region to support HD video.

Signed-off-by: Scott Jiang <scott.jiang.linux@gmail.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
This commit is contained in:
Scott Jiang 2012-05-18 16:27:22 -04:00 committed by Bob Liu
parent 2cdd700833
commit c8d11a06bf
2 changed files with 13 additions and 1 deletions
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6
arch/blackfin/Kconfig
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@ -1009,6 +1009,12 @@ config HAVE_PWM
choice
prompt "Uncached DMA region"
default DMA_UNCACHED_1M
config DMA_UNCACHED_32M
bool "Enable 32M DMA region"
config DMA_UNCACHED_16M
bool "Enable 16M DMA region"
config DMA_UNCACHED_8M
bool "Enable 8M DMA region"
config DMA_UNCACHED_4M
bool "Enable 4M DMA region"
config DMA_UNCACHED_2M

8
arch/blackfin/include/asm/bfin-global.h
View File

@ -14,7 +14,13 @@
#include <linux/linkage.h>
#include <linux/types.h>
#if defined(CONFIG_DMA_UNCACHED_4M)
#if defined(CONFIG_DMA_UNCACHED_32M)
# define DMA_UNCACHED_REGION (32 * 1024 * 1024)
#elif defined(CONFIG_DMA_UNCACHED_16M)
# define DMA_UNCACHED_REGION (16 * 1024 * 1024)
#elif defined(CONFIG_DMA_UNCACHED_8M)
# define DMA_UNCACHED_REGION (8 * 1024 * 1024)
#elif defined(CONFIG_DMA_UNCACHED_4M)
# define DMA_UNCACHED_REGION (4 * 1024 * 1024)
#elif defined(CONFIG_DMA_UNCACHED_2M)
# define DMA_UNCACHED_REGION (2 * 1024 * 1024)