* Bare metal Code to test Big Little on Arndale Octa (5420)
@ 2014-04-28 5:51 armdev
2014-05-02 8:57 ` armdev
` (2 more replies)
0 siblings, 3 replies; 5+ messages in thread
From: armdev @ 2014-04-28 5:51 UTC (permalink / raw)
To: linux-samsung-soc, linaro-kernel, Tushar Behera
Hi,
We are trying a write a bare metal test code for Switching tasks from A15 Core to A7 core.
As of now we have this article to start with https://lwn.net/Articles/481055/.
Can the list help us in
a) Where (file/directory ) in Linux kernel code that does the switching code (arch specific) for 5420 ?
b) Any test cases for big little on 5420 ?
-Regards
armdev team
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Bare metal Code to test Big Little on Arndale Octa (5420)
2014-04-28 5:51 Bare metal Code to test Big Little on Arndale Octa (5420) armdev
@ 2014-05-02 8:57 ` armdev
2014-05-02 17:43 ` Tomasz Figa
2014-05-05 4:12 ` Amit Kucheria
2 siblings, 0 replies; 5+ messages in thread
From: armdev @ 2014-05-02 8:57 UTC (permalink / raw)
To: linux-samsung-soc, linaro-kernel, Tushar Behera
Please comment
On 28-Apr-2014, at 11:21 am, armdev <armdev.ftm@gmail.com> wrote:
> Hi,
>
> We are trying a write a bare metal test code for Switching tasks from A15 Core to A7 core.
> As of now we have this article to start with https://lwn.net/Articles/481055/.
>
> Can the list help us in
> a) Where (file/directory ) in Linux kernel code that does the switching code (arch specific) for 5420 ?
> b) Any test cases for big little on 5420 ?
>
>
> -Regards
> armdev team
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Bare metal Code to test Big Little on Arndale Octa (5420)
2014-04-28 5:51 Bare metal Code to test Big Little on Arndale Octa (5420) armdev
2014-05-02 8:57 ` armdev
@ 2014-05-02 17:43 ` Tomasz Figa
2014-05-03 5:21 ` armdev
2014-05-05 4:12 ` Amit Kucheria
2 siblings, 1 reply; 5+ messages in thread
From: Tomasz Figa @ 2014-05-02 17:43 UTC (permalink / raw)
To: armdev, linux-samsung-soc, linaro-kernel, Tushar Behera
Hi,
On 28.04.2014 07:51, armdev wrote:
> Hi,
>
> We are trying a write a bare metal test code for Switching tasks from A15 Core to A7 core.
> As of now we have this article to start with https://lwn.net/Articles/481055/.
>
> Can the list help us in
> a) Where (file/directory ) in Linux kernel code that does the switching code (arch specific) for 5420 ?
There is no mainline support for big.LITTLE on Exynos5420 yet. There
were some patches [1] posted for MCPM support, though.
[1] http://www.spinics.net/lists/arm-kernel/msg321666.html
> b) Any test cases for big little on 5420 ?
I'm not aware of any, but Exynos5 is not the primary platform I work on.
Best regards,
Tomasz
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Bare metal Code to test Big Little on Arndale Octa (5420)
2014-05-02 17:43 ` Tomasz Figa
@ 2014-05-03 5:21 ` armdev
0 siblings, 0 replies; 5+ messages in thread
From: armdev @ 2014-05-03 5:21 UTC (permalink / raw)
To: Tomasz Figa; +Cc: linux-samsung-soc, linaro-kernel, Tushar Behera
On 02-May-2014, at 11:13 pm, Tomasz Figa <tomasz.figa@gmail.com> wrote:
> Hi,
>
> On 28.04.2014 07:51, armdev wrote:
>> Hi,
>>
>> We are trying a write a bare metal test code for Switching tasks from A15 Core to A7 core.
>> As of now we have this article to start with https://lwn.net/Articles/481055/.
>>
>> Can the list help us in
>> a) Where (file/directory ) in Linux kernel code that does the switching code (arch specific) for 5420 ?
>
> There is no mainline support for big.LITTLE on Exynos5420 yet. There were some patches [1] posted for MCPM support, though.
>
Tomasz we are trying to add support of Big Little in our RTOS, can you please advice/suggest how to get reference code / documentation.
We have odroid xu and arndale octa.
> [1] http://www.spinics.net/lists/arm-kernel/msg321666.html
>
>> b) Any test cases for big little on 5420 ?
>
> I'm not aware of any, but Exynos5 is not the primary platform I work on.
>
> Best regards,
> Tomasz
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: Bare metal Code to test Big Little on Arndale Octa (5420)
2014-04-28 5:51 Bare metal Code to test Big Little on Arndale Octa (5420) armdev
2014-05-02 8:57 ` armdev
2014-05-02 17:43 ` Tomasz Figa
@ 2014-05-05 4:12 ` Amit Kucheria
2 siblings, 0 replies; 5+ messages in thread
From: Amit Kucheria @ 2014-05-05 4:12 UTC (permalink / raw)
To: armdev; +Cc: linux-samsung-soc, Lists linaro-kernel, Tushar Behera
Hi,
No public code has been released to boot all 8 cores on the 5420. You
can only see the A15s.
You could however, if you are interested, get IKS[1] working by
integrating the MCPM patches posted by Samsung and the IKS patches
that are already in mainline.
Regards,
Amit
[1] http://lwn.net/Articles/481055/
On Mon, Apr 28, 2014 at 11:21 AM, armdev <armdev.ftm@gmail.com> wrote:
> Hi,
>
> We are trying a write a bare metal test code for Switching tasks from A15 Core to A7 core.
> As of now we have this article to start with https://lwn.net/Articles/481055/.
>
> Can the list help us in
> a) Where (file/directory ) in Linux kernel code that does the switching code (arch specific) for 5420 ?
> b) Any test cases for big little on 5420 ?
>
>
> -Regards
> armdev team
> _______________________________________________
> linaro-kernel mailing list
> linaro-kernel@lists.linaro.org
> http://lists.linaro.org/mailman/listinfo/linaro-kernel
^ permalink raw reply [flat|nested] 5+ messages in thread
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2014-04-28 5:51 Bare metal Code to test Big Little on Arndale Octa (5420) armdev
2014-05-02 8:57 ` armdev
2014-05-02 17:43 ` Tomasz Figa
2014-05-03 5:21 ` armdev
2014-05-05 4:12 ` Amit Kucheria
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