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--- u-boot_cm11_and_archlinux_multiboot [2014/06/21 17:44] – created santox
+++ u-boot_cm11_and_archlinux_multiboot [2014/06/21 19:18] (current) – santox
@@ Line 1: / Line 1: @@
 ==== CyanogenMod 11 (KitKat) / Archlinux multiboot on Toshiba AC100 ====
-=== Installing CyanogenMod ===
+=== Switching to U-Boot and Installing CyanogenMod ===
+I installed CM-11 following [[https://code.google.com/p/cm-paz00/wiki/InstallGuide?tm=6]]
+Completing the process, you'll have also u-boot installed on your AC100 SOS partition (/dev/mmcblk0p1) !
+=== Adding a new item to u-boot menu ===
+Reboot your ac100 using SOS-BOOT: connect your ac100 to a PC via mini-USB cable, Press and hold CTRL+ESC+POWER keys at the same time on the ac100 and, from the pc:
+  nvflash --bl sos-uboot-r5-2013-09-23.bin --go
+ac100 will restart with sos kernel & minimal system.
+now you can access & mount ac100 partitions:
+  mkdir /sos
+  mount /dev/mmcblk0p1 /sos
+As you can see i used an sd to copy filesystem,kernel,modules,dtmb from. My ac100 is 16GB model, and i used mmcblk0p7 to install Archlinux.
+Ok, u-boot uses a "compiled" text file to show its menu: in /sos/boot you'll find boot.scr (CM-11 gift :)) ; let's copy it in boot.cmd and modify:
+  cd /sos/boot
+  cp boot.scr boot.cmd
+  vi boot.cmd
+now you'll have to delete (press 'x' some times... ) the "binary garbage" header, an add (press 'i' to switch vi in edit mode) a new line; something like:
+  setenv bootmenu_0 "Boot LNX ARCH =setenv bootargs 'root=/dev/mmcblk0p7 rootfstype=ext4 rootwait'; ext2load mmc 0:2 0x1000000 /boot/zImage; ext2load mmc 0:2 0x2000000 /boot/tegra20-paz00.dtb; bootz 0x1000000 - 0x2000000;"
+as you can see, i put my kernel image and dtb in LNX partition (mmc 0:2); if you want to use SOS partition (if you followed CM-11 installation instructions they are both sized 64MB) replace with mmc 0:1
+I wasted a lot of time figuring out how to instruct u-boot to load a kernel missing an initrd; finally i realized bootz needs two (kernel initrd) or three (kernel initrd dtb) arguments: if you have not an initrd, you must use a '-' as 2nd argument!
+=== compile boot.scr ===
+You must now compile boot.cmd to obtain an updated boot.scr:
+  mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "ubootscript" -d boot.cmd boot.scr
+=== Copying your kernel into ac100 ===
+As already stated, i used LNX partition for my kernel:
+  mkdir /lnx
+  mount /dev/mmcblk0p2 /lnx
+  mkdir /sd # to copy kernel from
+  mount /dev/mmcblk1p1 /sd
+  cp /sd/zImage /lnx/boot/
+  cp /sd/tegra20-paz00.dtb /lnx/boot/
+=== Installing archlinux filesystem ===
+Of course you'll need to format (already done during CM-11 installation) & mount your target partition
+  mkdir /arch
+  mount /dev/mmcblk0p7 /arch
+and untar rootfs on it:
+  cd /arch/
+  tar xvf /sd/ArchLinuxARM-trimslice-latest.tar .
+=== Copying (wifi) modules to root filesystem ===
+  bzcat /sd/modules.tar | tar xvf .
+=== Umounting partitions and rebooting ===
+Everything should now be in it's right place...
+  cd /
+  umount *
+cross your fingers, power off and after power on your ac100!
+=== Configure ArchLinux ===
+After a reboot, you can finally configure your archlinux installation.
+Follow [[archlinux#arch_base_configuration]] for instructions.
+=== Compiling your own kernel ===
+But where can you find an up-to-date kernel for your linux?
+Compile yourself your own!
+See [[kerneldev?&#mainline_git_kernel]] for instructions.