* [U-Boot] MMU Mapping
[not found] <1147516840.12179908.1408611845402.JavaMail.zimbra@enst.fr>
@ 2014-08-21 9:08 ` Alexandre Delove
2014-08-21 10:44 ` Stefano Babic
0 siblings, 1 reply; 3+ messages in thread
From: Alexandre Delove @ 2014-08-21 9:08 UTC (permalink / raw)
To: u-boot
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
^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] MMU Mapping
2014-08-21 9:08 ` [U-Boot] MMU Mapping Alexandre Delove
@ 2014-08-21 10:44 ` Stefano Babic
2014-08-22 1:27 ` Peng Fan
0 siblings, 1 reply; 3+ messages in thread
From: Stefano Babic @ 2014-08-21 10:44 UTC (permalink / raw)
To: u-boot
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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^ permalink raw reply [flat|nested] 3+ messages in thread
* [U-Boot] MMU Mapping
2014-08-21 10:44 ` Stefano Babic
@ 2014-08-22 1:27 ` Peng Fan
0 siblings, 0 replies; 3+ messages in thread
From: Peng Fan @ 2014-08-22 1:27 UTC (permalink / raw)
To: u-boot
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
>
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2014-08-22 1:27 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <1147516840.12179908.1408611845402.JavaMail.zimbra@enst.fr>
2014-08-21 9:08 ` [U-Boot] MMU Mapping Alexandre Delove
2014-08-21 10:44 ` Stefano Babic
2014-08-22 1:27 ` Peng Fan
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