[U-Boot] MMU Mapping

[U-Boot] MMU Mapping

[Alexandre Delove]

Hello

I am trying to disable the memory management unit on my sabreLite board, but i don't find what i should do. I also want to change the mapping of the MMU, but i don't know where it is.

Do you know which file i have to edit?

Sorry for my english, it's not my mother tongue.

Regards

Alexandre Delove

[U-Boot] MMU Mapping

[Stefano Babic]

Hi Alexandre,

On 21/08/2014 11:08, Alexandre Delove wrote:
> Hello
> 
> I am trying to disable the memory management unit on my sabreLite board, but i don't find what i should do. I also want to change the mapping of the MMU, but i don't know where it is.
> 

MMU is off in U-Boot. It is turned on by kernel. Or what do you mind ?

Best regards,
Stefano Babic

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[U-Boot] MMU Mapping

[Peng Fan]

Hi,

On 08/21/2014 06:44 PM, Stefano Babic wrote:
> Hi Alexandre,
> 
> On 21/08/2014 11:08, Alexandre Delove wrote:
>> Hello
>>
>> I am trying to disable the memory management unit on my sabreLite board, but i don't find what i should do. I also want to change the mapping of the MMU, but i don't know where it is.
>>
> 
> MMU is off in U-Boot. It is turned on by kernel. Or what do you mind ?

To ARM, if not defined CONFIG_SYS_DCACHE_OFF, dcache_enable->cache_enable(CR_C)->mmu_setup will enable mmu and build section mapping. U can try #define CONFIG_SYS_DCACHE_OFF if it is an ARM SoC board. mmu related code locates at arch/arm/lib/cache-cp15.c

Regards,
Peng.
> 
> Best regards,
> Stefano Babic
>