| === heathkid|2 is now known as heathkid | ||
| === heathkid|2 is now known as heathkid | ||
| === chrisccoulson_ is now known as chrisccoulson | ||
| blackthund3r | Hi there | 09:33 |
|---|---|---|
| blackthund3r | Is anyone around so I can ask a couple of questions about porting to armhf? | 09:33 |
| blackthund3r | I'm trying to get started with porting ubuntu to a tablet | 09:33 |
| === doko__ is now known as doko | ||
| blackthund3r | hello? | 09:52 |
| wookey | ask away | 10:11 |
| wookey | blackthund3r: ^ | 10:11 |
| blackthund3r | wookey: o.O hi | 10:30 |
| blackthund3r | Okay | 10:30 |
| blackthund3r | Basically I'm working on a tegra port of ubuntu | 10:30 |
| blackthund3r | and was wondering how I really start collating everything | 10:30 |
| blackthund3r | I have downloaded the linux4tegra kit and I've modified rootstock to produce an armhf package but I'm not really sure what the best way of testing all this is | 10:31 |
| blackthund3r | also how I would add certain patches to the kernel for specific device support | 10:31 |
| wookey | rootstock makes images not packages. Are you building a package for armhf or trying to build whole images? | 10:44 |
| blackthund3r | whole images | 10:45 |
| blackthund3r | and eventually a kernel too | 10:45 |
| blackthund3r | I'm attempting to get 12.04 booting on the Acer Iconia A500 | 10:46 |
| marvin24 | blackthund3r: you can use the ac100 image for starting | 10:46 |
| marvin24 | but you will need a working kernel | 10:46 |
| blackthund3r | hmm ok. Is that a better option than starting from scratch? | 10:46 |
| marvin24 | depends on your caps | 10:46 |
| blackthund3r | Sure. I believe there is a 2.6 chromeos kernel for this device but I'm trying to get as new a source tree compiled as possible | 10:47 |
| blackthund3r | caps? | 10:47 |
| marvin24 | capabilities | 10:47 |
| blackthund3r | ok sure | 10:47 |
| marvin24 | ac100 uses a 3.1 kernel (from nvidia) | 10:47 |
| blackthund3r | I'm new to kernel dev and this sort of thing although I'm very experienced with linux | 10:47 |
| blackthund3r | that makes sense. I've just checked that code out via git | 10:47 |
| blackthund3r | I believe the stuff I need to add in is here: https://github.com/iconia-dev | 10:48 |
| blackthund3r | how do I add that then tell make to use that config? | 10:48 |
| marvin24 | what kernel is this based on? | 10:50 |
| blackthund3r | Not sure. I believe they're patches for stock linux | 10:50 |
| blackthund3r | (in the github link) | 10:51 |
| blackthund3r | I'm working with the 3.1 kernel for nvidia | 10:51 |
| blackthund3r | *from | 10:51 |
| blackthund3r | it is preconfigured (I believe) for the ventana test board. I need to add those patches so it will work on the tablet | 10:51 |
| blackthund3r | (and then work on adding in drivers once I see what is actually supported OOTB) | 10:52 |
| marvin24 | sounds like a plan | 10:52 |
| blackthund3r | so how do I add those patches in? | 10:53 |
| blackthund3r | there is a vendor section with proprietary folder, | 10:53 |
| marvin24 | I haven't seen any patches in the repo at all | 10:54 |
| blackthund3r | and a device tree | 10:54 |
| blackthund3r | https://github.com/iconia-dev/android_device_acer_a500 and https://github.com/iconia-dev/android_vendor_acer_a500 | 10:54 |
| blackthund3r | also (probably a separate question) where is the section in the kernel source for the initramfs? | 10:56 |
| marvin24 | these are scripts for some build system, no kernel patches | 10:56 |
| blackthund3r | The plan is to install linux into /data/linux from within Android and install the kernel to the spare partition. Then chroot to it | 10:56 |
| marvin24 | the kernel seems to be available in binary form | 10:56 |
| blackthund3r | sure does. Should I try booting it to see what will happen? | 10:57 |
| marvin24 | I think you can use the android kernel and see how far you come | 10:57 |
| blackthund3r | I need to bridge it to an initramfs or it won't be useful, unless I can open a serial connection with it to view the output? | 10:57 |
| blackthund3r | hmm | 10:57 |
| blackthund3r | I hadn't considered that | 10:57 |
| blackthund3r | okay so assuming I used that kernel as it is fairly up to date (one dev has a 3.2.x-based kernel) | 10:58 |
| blackthund3r | how can I chroot to /data/linux? | 10:58 |
| blackthund3r | is that even possible? Has anybody every tried installing linux to a folder? | 10:58 |
| blackthund3r | I assume it would go fairly early in the init script | 10:59 |
| blackthund3r | if /data was mounted by the initramfs, could you then chroot to /data/linux? | 10:59 |
| blackthund3r | Or would it need to be remounted as /? | 10:59 |
| marvin24 | there is no /data on ubuntu | 11:00 |
| blackthund3r | I could call it anything when mounted though right? | 11:00 |
| blackthund3r | okay /mnt/data | 11:00 |
| marvin24 | ah, you can try to mount an ubuntu fs in android | 11:00 |
| marvin24 | and chroot to it | 11:00 |
| blackthund3r | no I've done that already ;) | 11:01 |
| blackthund3r | I mean use the kernel to do it and boot up from a chroot | 11:01 |
| blackthund3r | the data partition is mmcblk0p9 | 11:01 |
| blackthund3r | the data partition is mmcblk0p8 | 11:01 |
| blackthund3r | so if mmcblk0p8 was mounted by the ramdisk | 11:02 |
| blackthund3r | then the linux folder was set as the root | 11:02 |
| blackthund3r | would this work? | 11:02 |
| blackthund3r | that would mean Ubuntu could be booted natively whilst keeping that partition | 11:03 |
| blackthund3r | the data partition is pretty huge | 11:03 |
| blackthund3r | so it makes sense to install linux there | 11:03 |
| blackthund3r | and somehow boot it | 11:03 |
| marvin24 | you may create your own initrd (from the chroot) | 11:05 |
| marvin24 | and pass it to the kernel | 11:05 |
| blackthund3r | hmm | 11:05 |
| marvin24 | also the root partition (via root=...) kernel command line | 11:05 |
| blackthund3r | can you mount a partition beforehand? | 11:05 |
| blackthund3r | Wait no that wouldn't work | 11:05 |
| blackthund3r | okay so if root=magicinitrd | 11:06 |
| marvin24 | no, the ubuntu initrd will try to mount root | 11:06 |
| blackthund3r | then somewhere in that initrd it needs to mount /dev/block/mmcblk0p8 | 11:06 |
| marvin24 | the initrd is mounted automaticly by the kernel (if it is there) | 11:06 |
| blackthund3r | then fuse-mount /mnt/mmcblk0p8 as / | 11:06 |
| blackthund3r | sure | 11:06 |
| blackthund3r | so how does linux's initrd then mount the rest of the filesystem? | 11:07 |
| marvin24 | /etc/fstab ? | 11:07 |
| blackthund3r | because it is almost a union of the initrd and the partition | 11:07 |
| blackthund3r | makes sense | 11:07 |
| blackthund3r | okay android seems a little different | 11:08 |
| marvin24 | yes, userspace is totally different | 11:08 |
| blackthund3r | the android initrd will use /fstab.t20 to mount all the partition in the own folders | 11:08 |
| blackthund3r | although (I assume) ubuntu will mount the RootFS as /? | 11:08 |
| marvin24 | it should | 11:09 |
| marvin24 | but I'm also not an expert | 11:09 |
| blackthund3r | ok sure. | 11:09 |
| blackthund3r | So in that case I need to understand roughly how that works | 11:09 |
| blackthund3r | in order to mount a partition then set a folder rather than a partition as / | 11:10 |
| marvin24 | I still don't understand why you want to do this | 11:11 |
| blackthund3r | in order to boot ubuntu up with it installed in a folder | 11:11 |
| blackthund3r | currently there is /data/media, /data/Android etc etc | 11:12 |
| marvin24 | in android, the partitions are also mounted on folders | 11:12 |
| blackthund3r | so I want a /data/linux | 11:12 |
| blackthund3r | which the linux kernel will use as a rootfs | 11:12 |
| blackthund3r | yes but android doesn't need to mount a new rootfs - the initrd is the complete rootfs as the main system works out of the /system folder | 11:12 |
| marvin24 | if fact, the mount point doesn't matter | 11:12 |
| marvin24 | why do you want to keep this strange android way of booting? | 11:13 |
| blackthund3r | so is what I want to do possible? | 11:13 |
| marvin24 | why not just mount the root partition and you are finished | 11:13 |
| blackthund3r | to not have to wipe out all the userdata in order to install ubuntu | 11:13 |
| marvin24 | you can also boot from a sdcard | 11:13 |
| marvin24 | I guess the a500 has a slot for it | 11:14 |
| blackthund3r | so install straight to the data partition alongside the rest of the android data? | 11:14 |
| blackthund3r | yes you can but it's only cool if it works from the internal memory ;) | 11:14 |
| blackthund3r | more storage that way too - there are some 64GB tabs | 11:14 |
| blackthund3r | once I have a reliable way of doing this, I want to extend it to making an easy way of patching an existing android ROM to boot from, say, /data/sys2 or /data/sys3 so you can dual boot ROM | 11:16 |
| blackthund3r | *ROMs | 11:16 |
| blackthund3r | but that's a later project. For now I want a working ubuntu install | 11:16 |
| blackthund3r | for tablets like this it'd be really useful to have a full RootFS in a folder | 11:17 |
| blackthund3r | particularly as the filesystem is ext4 anyway | 11:17 |
| blackthund3r | it saves repartitioning stuff | 11:17 |
| marvin24 | blackthund3r: you can split the "user" partition | 11:30 |
| marvin24 | don't know anymore where it was mounted | 11:30 |
| blackthund3r | split how? | 11:30 |
| blackthund3r | repartition it? | 11:30 |
| marvin24 | yes | 11:30 |
| blackthund3r | that would cause ROM issues | 11:30 |
| marvin24 | it worked fine on the ac100 | 11:30 |
| blackthund3r | hmm | 11:30 |
| blackthund3r | this is the anatomy of the a500 | 11:30 |
| blackthund3r | http://projects.pappkartong.se/a500/ | 11:30 |
| blackthund3r | actually it might work | 11:31 |
| blackthund3r | but then you have to dedicate that space | 11:31 |
| blackthund3r | (which is what I was trying to avoid :P) | 11:31 |
| blackthund3r | and the whole tablet would still have to be wiped out to do that as I understand | 11:32 |
| blackthund3r | nvflash isn't the most user-friendly of tools! | 11:32 |
| blackthund3r | eventually I want this to be available to the public | 11:33 |
| blackthund3r | brb :) | 11:34 |
| blackthund3r | thanks for your help marvin24! | 12:12 |
| blackthund3r | gtg :( | 12:12 |
| * lilstevie thinks he is going about that in the most difficult way he can find | 12:16 | |
| lilstevie | picasso and tf101 are very similar, with a small patch it would boot with the same kernel | 12:17 |
| ogra_ | nah, cant be that would break the well estabished arm fragemntation vendors worked on for years ! | 12:18 |
| ogra_ | :) | 12:18 |
| lilstevie | ogra_, muromec ported 2.6.38 to both the tf101 and picasso, if you compile it with both boards defined in the config it comes down to a few if(is_machine_picasso()) blocks difference | 12:19 |
| lilstevie | I have no idea why though :p arm fragmentation is common, and expected | 12:20 |
| ogra_ | yeah, evil, the vendors should sue him to break it :) | 12:23 |
| ogra_ | s/to break/for breaking/ | 12:23 |
| lilstevie | :p | 12:24 |
| lilstevie | lol " hey guys there is a rumor about windows 8 coming out for tablets and im so excited for that " <-- got to love forums, that was posted today | 12:25 |
| ogra_ | yeah, finally more locked down HW on the market | 12:26 |
| lilstevie | yeah | 12:28 |
| lilstevie | uefi comes to arm, but not to benefit the platform :( | 12:28 |
| === Quintasan_ is now known as Quintasan | ||
| === Ursinha` is now known as Ursinha | ||
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