Hi, l4 hackers

Is there anybody who can a bit give hints about SD card on L4 Linux to him ?

On 01/26/2015 09:10 PM, Praveen B wrote:

Hi Taeung,

Thank you very much.

It is part of my Masters project. My project is to run L4Android using Genode(www.genode.org http://www.genode.org) framework on Freescale i.MX6 board. But root filesystem has to be present on microSD Card. So I am trying to enable SD card support for L4Linux right now.

The guide describes how to enable Ethernet controller. Did you try to enable SD card controller as well? Is it difficult than this?

Yes I tried to enable SD card. But I couldn't do it. Because I didn't complete modifying 'mach_setup.c' in L4 linux to enable SD card.

I have some doubts. How do I give names such as, NIC => new Device() --name: NIC .hid = "imx6q-fec.0"; --imx6q-fec.0 "imx6q-fec.dev" --imx6q-fec.dev

Are they just arbitrary? Can I use any names of my choice if I want to enable SD card support?

Yes, but the name have to make a pair with the name of argument for 'l4x_register_platform_device_callback()' function. but I'm not sure it.

The guide still uses ramdisk and not some other rootfs, isn't it? Can I modify .cfg file so that I can boot from SD card like(//dev/mmcblk1p1)?/

In my opinion, in order to enable SD card in L4 you have to do as below..

1. Register SD card in io server 2. Modify mach_setup.c for SD card 3. Modify SD card driver source code for L4 (if it is needed to enalbe SD card in L4)

For anything I know, three things is my thought.

Is there anybody who can a bit give hints to him ?

Thank you again for creating such a good guide for beginners like me.

My pleasure, I had lots of help from l4-hackers.

Thanks, Taeung

Regards Praveen

On Mon, Jan 26, 2015 at 9:20 AM, taeung <treeze.taeung@gmail.com mailto:treeze.taeung@gmail.com> wrote:

Hi Praveen :-)

Here it is
https://www.dropbox.com/s/os65yqiieay83hs/L4_Porting_and_Device_Driver_Guide.pdf

I'm sorry to be so late.
I forgot it.

Cheer up !

Would you mind if I ask you a question about working on L4 Linux ?
Is the project homework from your university ?

Thanks,
Taeung



On 01/23/2015 06:47 PM, Praveen B wrote:

...

Hi Taeung,

I'm a student, working on L4Linux as part of my project. I am
using Freescale i.MX6Q board. I'm trying to boot using root
filesystem on SD card. But could not understand, how I could do it.

It seems(from l4-hackers mailing list) that you have already
tried to boot L4Linux using a different root filesystem than
ramdisk on freescale i.mx6q board.

Could you help me in doing this?

I've read your post,
http://os.inf.tu-dresden.de/pipermail/l4-hackers/2014/006463.html.
But I could not find the file,
https://www.dropbox.com/s/abj9ao5uk9r3w72/The_Guide_to_access_HW_on_L4Linux_v1.0.pdf

It gives 404 error. *It would be very helpful if you can provide
this file.*

Please send the file or give any suggestions how I can proceed.

Thank you
Praveen