[SOLVED] How does /proc/cpuinfo gets populated...?

VinayBondade · 12-09-2010, 09:19 AM

Hello,

I need to understand how the Kernel gets the CPU information that is present in the /proc/cpuinfo. Does the bootloader provides it. If so any idea how does the RedBoot would do this.

The question in-front of me is that I need to pass serial number of the hardware (i.MX25 stack 3 board from freescale) from RedBoot to the Kernel and the serial number should reflect in the /proc/cpuinfo.

Any suggestions on how do I accomplish this...?

Regards,
Vinay

xeleema · 12-09-2010, 01:18 PM

Greetings!
As there isn't (typically) a "Serial Number" value polled by /proc/cpuinfo, you would have to modify the Linux kernel and recompile.
I'm not familiar with the "Stack 3" i.MX25 board, is that ARM-based like the other FreeScale ones?

VinayBondade · 12-10-2010, 03:22 AM

Xeleema,

Greetings. Thanks for the reply... I figured out the means to pass the serial number of the hardware from the BootLoader, in my case the RedBoot. Its just theoritically in my mind, have to try to see if it works. Check this link (section 8), it has info about the same.

http://www.simtec.co.uk/products/SWL...g_article.html

Yes, the stack 3 board is the ARM based one.

VinayBondade · 12-10-2010, 03:53 AM

And yes it did work....

xeleema · 12-10-2010, 09:26 AM

That's awesome!
Thank you very much for providing the link, and for marking this thread as [SOLVED]!

pirpi · 07-07-2015, 07:00 AM

Hi,

I am new to the linux. I want to change the cpu serial parameter using ATAG_SERIAL of arm7 board. could you please tell me the steps to load the new serial number through the bootloader?

Thanks
Pirpi

jpollard · 07-07-2015, 03:20 PM

I would think the serial number would depend on the hardware... If you are actually USING the serial number (such as the licensing for the video codecs), I would think you would be unable to use the modified serial number.