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
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
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
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
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
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Amit Kucheria -
armdev -
Tomasz Figa