Changing bootargs parameters

Hello,

i am able to boot zed board succesfully by following the normal steps.

But for my project i need to use only one core and memory of 112MB of zed board.

When i change the bootargs to,

bootargs = "console=ttyPS0,115200 maxcpus=1 mem=112M@0x0"; in .dts file.

And then created boot.bin and image.ub files.

But now i am not able to boot the zed board.

Is the method i am following is correct??

How to make zedboard to have above mentioned parameters by changing bootrags???

0 zedhed over 10 years ago

Hi Darshan,

You might have better luck by restricting the memory region definition rather than use bootargs for changing the usable memory space.

ps7_ddr_0: memory@0 {
device_type = "memory";
reg = < 0x0 0x20000000 >;
} ;

Maybe changing this line from 512MB to 128MB space would work for you?

reg = < 0x0 0x8000000 >;

Also, this thread might be interesting to you:

https://github.com/Xilinx/linux-xlnx/issues/58

Regards,

-Kevin
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0 Former Member over 10 years ago

Thanks Kevin Keryk.

I have changed the memory settings and created boot.bin and image.ub files.

When i try to boot,
Instead of blue led (LD12) the green LED (LD9 MI07) is blinking on the board.
I am not able to boot.
What does the LD9 represents ??
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0 Former Member over 10 years ago in reply to zedhed

Thanks Kevin Keryk.

I have changed the memory settings and created boot.bin and image.ub files.

When i try to boot,
Instead of blue led (LD12) the green LED (LD9 MI07) is blinking on the board.
I am not able to boot.
What does the LD9 represents ??
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0 zedhed over 10 years ago

Hi Darshan,

That is pretty strange. What Linux are you using?

If the Done LED (LD12) is not coming on, that indicates that the PL is not getting loaded with the Bitstream file. The green LED is tied to MIO which gets its first configuration during FSBL execution so if it is blinking that may indicate that you are somehow stuck in reboot.

Did you change anything else in any part of your design other than the devicetree file?

Regards,

-Kevin
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0 Former Member over 10 years ago

Hi Kevin Keryk,

I made changes to bootargs in dts file.

I am also confused since while building i will not get any error but it's not booting.
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0 Former Member over 10 years ago

Hi Kevin Keryk,

I made changes to bootargs in dts file.

I am also confused since while building i will not get any error but it's not booting.
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