lkml.org 
[lkml]   [2012]   [Aug]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH - 2/2] arm: disable caches based on config option
On Thu, 30 Aug 2012, Murali Karicheri wrote:

> CONFIG_CPU_ICACHE_DISABLE and CONFIG_CPU_DCACHE_DISABLE are available
> to allow disabling of D-Cache and I-Cache. However the compressed version
> of head.S currently doesn't check these variables. This patch will fix
> this issue and is written similar to the uncompressed version of head.S
>
> Signed-off-by: Murali Karicheri <m-karicheri2@ti.com>

Acked-by: nicolas Pitre <nico@linaro.org>

You may submit your patch to http://www.arm.linux.org.uk/developer/patches/.


> ---
> arch/arm/boot/compressed/head.S | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S
> index b8c64b8..e1d2124 100644
> --- a/arch/arm/boot/compressed/head.S
> +++ b/arch/arm/boot/compressed/head.S
> @@ -659,6 +659,12 @@ __armv7_mmu_cache_on:
> #ifdef CONFIG_CPU_ENDIAN_BE8
> orr r0, r0, #1 << 25 @ big-endian page tables
> #endif
> +#ifdef CONFIG_CPU_DCACHE_DISABLE
> + bic r0, r0, #1 << 2
> +#endif
> +#ifdef CONFIG_CPU_ICACHE_DISABLE
> + bic r0, r0, #1 << 12
> +#endif
> orrne r0, r0, #1 @ MMU enabled
> movne r1, #0xfffffffd @ domain 0 = client
> mcrne p15, 0, r3, c2, c0, 0 @ load page table pointer
> --
> 1.7.9.5
>


\
 
 \ /
  Last update: 2012-08-30 18:41    [W:0.034 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site