Booting error in L4android for Exynos 5250.

Youren Shen shenyouren at gmail.com
Wed May 20 05:08:00 CEST 2015


Thank you very much for your reply.


>
> On Wed May 13, 2015 at 22:23:18 +0800, Youren Shen wrote:
> > I'm trying to booting L4Android in Exynos 5250 platform. I got some
> > questions. If anyone can give me any direction or document, It will be
> very
> > helpful.
> >
> > 1, How to edit this vbus and devs file to match my platform?
> > For example, if I want replace the MOUSE in vbus with TOUCHSCREEN, what
> > should I write to determine the driver of the touchscreen, and the
> register
> > address of the driver?
> > It seems the .hid can assign the driver? And the MMio can remap the
> address
> > of the IO for driver?
>
> A vbus defines the resources (IRQs and MMIO) for a whole client, i.e.
> it's not per driver but per client (e.g. L4Linux). For the touchscreen
> you need to give the MMIO regions and IRQs that the touchscreen driver
> is using.
>
> > 2, As for GUI driver, what the mag and fb-drv do ? Should I write one
>
> The fb-drv is the framebuffer driver, i.e. the driver that maps some
> memory in such a way to the framebuffer hardware that something appears
> on the screen. mag is a small window manager that makes multiple
> windows, that you can drag around, out of the single hardware
> framebuffer.
>
> > driver in L4RE or I can reuse the driver in Linux?
>
> Reusing the driver from L4Linux is possible but typically framebuffer
> drivers are reasonable small to be implemented standalone.
>
> > *For this two question I just need some guide*, I can't find details
> > explanation of the file or tutorial in Wiki page.
> >
> > Thank you very much!
> >
> > Also I got some new error when booting. The system mount failed. Would
> you
> > mind to take a look?
> >
> > RAMDISK: Loading 1024KiB [1 disk] into ram disk... done.
> >
> > EXT4-fs (ram0): couldn't mount as ext3 due to feature incompatibilities
> >
> > EXT4-fs (ram0): mounting ext2 file system using the ext4 subsystem
> >
> > EXT4-fs warning (device ram0): ext4_update_dynamic_rev:701: updating to
> rev
> > 1 bd
> > EXT4-fs (ram0): mounted filesystem without journal. Opts: (null)
> >
> > VFS: Mounted root (ext2 filesystem) on device 1:0.
> >
> > Freeing unused kernel memory: 164K (02356000 - 0237f000)
> >
> > init: cannot open '/initlogo.rle'
> >
> > EXT4-fs (ram0): re-mounted. Opts: (null)
> >
> > init: Unable to open persistent property directory /data/property errno:
> 2
> >
> > init (1): /proc/1/oom_adj is deprecated, please use /proc/1/oom_score_adj
> > inste.
> > init: cannot find '/system/bin/servicemanager', disabling
> 'servicemanager'
> > init: cannot find '/system/bin/vold', disabling 'vold'
>
> Looks like the system partition could not be mounted. Where should it
> be?
>
> I'm using the image and config files that L4Android.org supplied.
I copied the two image file(root-arm-ginger.img and system-arm-ginger.img)
to l4/build/bin/$arch/l4f

So here is the module list:

*entry l4android-arm*
*roottask moe rom/l4_gingerbread-arm.cfg*
*kernel fiasco -serial_esc*
*module l4re*
*module ned*
*module io*
*module mag*
*module fb-drv*
*module l4_gingerbread-arm.cfg*
*module arm-rv-eb.devs*
*module l4_android-arm.vbus*
*module vmlinuz.android*
*module root-arm-ginger.img*
*module system-arm-ginger.img*

And here is the parameter of loader:start in ned script.


*"rom/" .. lxname .. " console=ttyLv0 androidboot.console=ttyLv0 mem=256M
l4bdds.add=rom/system-arm-ginger.img,rw boot=local android.ril=ttyLv1
ip=dhcp l4x_rd=rom/root-arm-ginger.img rw root=1:0 ramdisk_size=1500
init=/init --debug l4fb.touchscreen=1*

In the root-arm-ginger.img file, the init script should mount the /system:

*mount cramfs /l4bdds0 /system
**mount cramfs /l4bdds0 /system ro remount
**mount tmpfs tmpfs /data size=32M*

But it failed.

I check the CRAMFS and it's enable in Linux kernel. Then I have  no idea
about what can cause this /system mount error.

Thank you very much for your help!

-- 
Best Regards.
Youren Shen.
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