Nokius/ac100-kernel.md

## ac100-kernel.md

      
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              ac100-kernel.md
            
          
    ARCH LINUX WITH MAINLINE KERNEL FOR TOSHIBA AC100

all u need


1-2 hours of your life
build envirment for the Kernel
device with Ubuntu and nvflash
AC100
mini-usb cabel
usb-stick >512MB

build the kernel


setup the build enviorment


create the work directory:
  mkdir -p ~/ac100/output_files 


get the kernel source


get the sources:
   curl -LO https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.5.2.tar.xz 
   cd linux-4.5.2 


build the kernel


genrate the config
   make tegra_defconfig ARCH=arm 


adjust the config for:


Kernel low-level debugging options
in Kernel hacking
to OFF


USB Video Class
in 	Device drivers --> Multimedia support --> Media USB Adapters
to MODULE


USB NETWORK Device [only if like to use anadapter] you will find the availbe Modules under
in Device drivers --> Network device support --> USB Network Adapters
to MODULE


   make menuconfig ARCH=arm 


build zIMAGE, modules, dtb
   
  make zImage modules dtbs  INSTALL_MOD_STRIP=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
  

build install-modules
  
  make modules_install INSTALL_MOD_PATH=../output_files INSTALL_MOD_STRIP=1 ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf-
  

copy dtb and zImage to the output_files directory
   cp arch/arm/boot/dts/tegra20-paz00.dtb ../output_files 
   cp arch/arm/boot/zImage ../output_files 


make output flashable


change into output_files directory
   cd ../output_files 


create needed folders
   mkdir boot usr 


move lib into usr [to avoid breaks of arch]
   mv lib usr 


move zImage and dtb into boot
   mv zImage boot 
   mv tegra20-paz00.dtb boot 


create boot.cmd
  
  cat <<'EOF' > ~/ac100/output_files/boot/boot.cmd
  setenv bootargs 'root=/dev/mmcblk0p1 rootfstype=ext4 rootwait'
  ext2load mmc 0:1 0x1000000 /boot/zImage
  ext2load mmc 0:1 0x2000000 /boot/tegra20-paz00.dtb
  bootz 0x1000000 - 0x2000000
  EOF
  

create directory etc
  
  mkdir etc
  

add fstab
  
  cat <<'EOF' > ~/ac100/output_files/etc/fstab
  /dev/mmcblk0p1  /   ext4    rw,noatime,commit=30,barrier=1,data=ordered    0    0
  EOF
  	

pack the files
   tar cf kernel.tar boot usr etc 


prepare pen drive


copy kernel.tar to pen drive
   cp ~/ac100/output_files/kernel.tar < mountpoint of the pen drive > 


get Arch Linux filesystem for Tegra systems
   curl -o < mountpoint of the pen drive > http://archlinuxarm.org/os/ArchLinuxARM-trimslice-latest.tar.gz 


boot AC100 into recovery mode

press ctrl + esc + Power


install on the flash host nvflash
 
 curl -O /tmp https://phablet-paz00.googlecode.com/files/nvflash_20110628-2_all.deb ; sudo dpkg -i nvflash_20110628-2_all.deb
 

connect AC100 with your flash Host


get and boot a minimal SOSUBOOT


on the flash Host
  
  curl -O /tmp https://dl.dropboxusercontent.com/u/40761340/Test/sos-uboot-r5-2013-11-10.bin 
  nvflash --bl sos-uboot-r5-2013-11-10.bin --go
  

on the AC100
  
  ./switch-to-uboot
  

prepare the AC100


create one new partions [maybe u like to backup the old once]
  
  parted /dev/mmcblk0 mklabel gpt
  parted /dev/mmcblk0 -s mkpart primary 7168s '100%'
  parted /dev/mmcblk0 -s name 1 UDB
  

create filesystem
  
  mkfs.ext4 /dev/mmcblk0p1
  

Install Kernel and OS


create mount point
  
  mkdir /target
  mkdir /source
  	

mount the emmc
  
  mount -t ext4 /dev/mmcblk0p1 /target
  	

inserte the stick and mount it
  
  mount -t vfat /dev/sda1 /source
  	

change into directory /target
  
  cd /target
  	

extract the ARCH Linux filesystem
  
  gzip -dc /source/ArchLinuxARM-trimslice-latest.tar.gz | tar xp
  

erase /boot to add new builded kernel for the AC100
  
  rm -rf boot/*
  	

unpack kernel.tar
  
  tar xf /source/kern.tar
  	

change into the /boot directory
  
  cd /target/boot
  

make the kernel bootable
  
  mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "ubootscript" -d boot.cmd boot.scr
  	

sync for safety
  
  sync
  

unmount the pen drive and the emmc
  
  cd /; umount /target; umount /source
  

enjoy Arch Linux and the mainline kernel on your AC100 \o/

Source:
AC100 wiki 

dev.cutecolors.jp.net 

UNicksDaemon 

ddevnet.net