chromium os image running on 32 bit arm soc

ISheng Lin

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Dec 12, 2012, 4:12:13 AM12/12/12

to chromiu...@chromium.org

I checked the official site about the image running on 32 bit machine but nothing to be fetched so far.

It is no problem to build the image since I have a 64bit laptop to do it.

Target:
port chromium os to a 32 bit soc with arm architecture

Quesiton:
Can chromium os to be built 32 bit arm architecture? if so, how?

Thanks for your reply.

Olof Johansson

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Dec 12, 2012, 12:10:00 PM12/12/12

to ISheng Lin, chromiu...@chromium.org

2012/12/12 ISheng Lin <ckjbo...@gmail.com>

Yes, the Samsung Chromebook systems are based on EXYNOS5, which is a 32-bit ARM platform.

There are several overlays for arm in the build system, including one for arm-generic, pandaboard and a few others. Please start out with reading the developer documentation on http://dev.chromium.org/chromium-os to learn more about how to build it.

-Olof

ISheng Lin

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Dec 12, 2012, 8:54:30 PM12/12/12

to chromiu...@chromium.org, ISheng Lin

Hi Olof,

Yes, I went though this official site and found that it provides a "Select a board" topic.

export BOARD=x86-generic/arm-generic

I have built "chromiumos_image.bin" for both arm and x86 architecture.

However, i am not sure if these images are 64 bits or 32 bits.

I guess the default is 64 bits. How to change this to 32 bits?

Thanks

Regards-

Olof Johansson於 2012年12月13日星期四UTC+8上午1時10分00秒寫道：

Olof Johansson

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Dec 12, 2012, 9:03:28 PM12/12/12

to ISheng Lin, chromiu...@chromium.org

2012/12/12 ISheng Lin <ckjbo...@gmail.com>

Hi Olof,

Yes, I went though this official site and found that it provides a "Select a board" topic.

export BOARD=x86-generic/arm-generic

I have built "chromiumos_image.bin" for both arm and x86 architecture.

However, i am not sure if these images are 64 bits or 32 bits.

I guess the default is 64 bits. How to change this to 32 bits?

Both x86-generic and arm-generic are 32-bit images.

-Olof

ISheng Lin

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Dec 12, 2012, 9:08:44 PM12/12/12

to chromiu...@chromium.org, ISheng Lin

If this is true, then why I can use my usb stick(flash the image which i just built) to boot up my laptop with x86-64 bit cpu?

Thanks for the prompt reply.

Olof Johansson於 2012年12月13日星期四UTC+8上午10時03分28秒寫道：

Don Garrett

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Dec 12, 2012, 9:14:37 PM12/12/12

to ISheng Lin, chromiu...@chromium.org

The type of CPU doesn't change when you boot a 32 bit os.

Try:
file /bin/ls

And see if it reports a 32 bit or 64 bit executable. All executables
(and the kernel) will either be 32 bit or 64 bit.

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--
Don

Sonny Rao

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Dec 12, 2012, 9:24:49 PM12/12/12

to ISheng Lin, chromiu...@chromium.org

because the x86-64 bit cpu is backwards compatible and will run a 32-bit OS

On Wed, Dec 12, 2012 at 6:08 PM, ISheng Lin <ckjbo...@gmail.com> wrote:

ISheng Lin

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Dec 12, 2012, 9:28:08 PM12/12/12

to chromiu...@chromium.org, ISheng Lin

Oh yea, thanks for letting me know. : )
Sonny Rao於 2012年12月13日星期四UTC+8上午10時24分49秒寫道：

ISheng Lin

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Dec 12, 2012, 9:29:00 PM12/12/12

to chromiu...@chromium.org, ISheng Lin

Thanks for the reply Don.

Don Garrett於 2012年12月13日星期四UTC+8上午10時14分37秒寫道：

teke...@gmail.com

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Feb 18, 2013, 10:13:42 PM2/18/13

to chromiu...@chromium.org, ISheng Lin

hi,why I build a x86-generic image following develop guide can only run on Intel 64bit cpu laptop, can't run on 32bit cpu laptop, just blackscreen after chromium icon appear？

Olof Johansson

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Feb 19, 2013, 1:29:05 AM2/19/13

to teke...@gmail.com, chromiu...@chromium.org, ISheng Lin

Please don't comment on random posts with a new topic.

I'm guessing that the 32-bit laptop you have uses a GPU that isn't supported.

-Olof

2013/2/18 <teke...@gmail.com>

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