Re: [PATCH] Change the internal SRAM memory type MT_MEMORY_NONCACHED

From: Nicolas Ferre
Date: Thu Jun 13 2013 - 09:20:10 EST

On 08/06/2013 04:17, Wenyou Yang :
Because MT_DEVICE is not executable in armv7, we change
the internal SRAM memory type to MT_MEMORY_NONCACHED.
As it seems that caching this internal SRAM memory is not necessary,
we chose the this memory type.

Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>

Acked-by: Nicolas Ferre <nicolas.ferre@xxxxxxxxx>

But Russell, can we have your advice on this as you made us re-think about that during previous patch discussion?


arch/arm/mach-at91/setup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/mach-at91/setup.c b/arch/arm/mach-at91/setup.c
index a33d4b5..98d55ef 100644
--- a/arch/arm/mach-at91/setup.c
+++ b/arch/arm/mach-at91/setup.c
@@ -84,7 +84,7 @@ void __init at91_init_sram(int bank, unsigned long base, unsigned int length)

desc->pfn = __phys_to_pfn(base);
desc->length = length;
- desc->type = MT_DEVICE;
+ desc->type = MT_MEMORY_NONCACHED;

pr_info("AT91: sram at 0x%lx of 0x%x mapped at 0x%lx\n",
base, length, desc->virtual);

Nicolas Ferre
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