Hi Kim,

On Fri, 1 Mar 2013 16:11:36 +0000 Akshay Saraswat akshay.s@samsung.com wrote:

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Samsung Enterprise Portal mySingle

Hi Kim,

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On Thu, 28 Feb 2013 11:08:21 +0000

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Akshay Saraswat akshay.s@samsung.com wrote:

As you can see, no. It looks like you didn't change anything. I have to manually single-space things below.

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So, I have incremented this value to 500 which shall be good enough for the lowest of all frequencies. But I guess what we need here is some formula, to calculate timeout on the basis of frequency, which is nowhere defined.

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That's odd - I see a bunch of frequencies advertised in arch/arm/cpu/armv7/exynos/clock.c. Or how about using a cycle counter instead? btw, where can I find documentation for the ACE?

I tried with different frequencies and data sizes and found that it takes 2 to 3 msecs in all the cases. Since, it is hardware accelerated encoding it is supposed to behave in this same manner. But the current version of u-boot behaves mysteriously and slow downs when pressed enter for long. In the above case mentioned I even saw time took to be more than 100 msecs for all the cases. I think it would not be a better idea to timeout encoding acceleration. But still if it is needed, cycle counter suggestion would be a great solution.

it depends on whether the h/w can fault during its operation.

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You can read Exynos5250 manual's "Security subsystem" section, which I referred for this.

you mean this?:

http://www.samsung.com/global/business/semiconductor/file/product/Exynos_5_D...

Yes, this is the manual. But this ine is just a part of it which has been made public by Samsung. The one I have has 64 chapters in it and security subsystems is the 57th chapter.

There is no "Security subsystem" section.

Kim

Regards, Akshay Saraswat