Difference between revisions of "Compile a uBoot Kernel"

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Line 12: Line 12:
 
  # cd /usr/src
 
  # cd /usr/src
 
  # ln -sfn linux-2.6.26-gentoo-r2 linux
 
  # ln -sfn linux-2.6.26-gentoo-r2 linux
 
 
 
  
 
===Edit your kernel config===
 
===Edit your kernel config===
Line 28: Line 25:
 
  # make menuconfig
 
  # make menuconfig
 
The default config is minimal.  You'll have to enable support for any non-standard things you may be using.  I use reiserfs and netatalk, so I enabled support for that filesystem and also for appletalk.
 
The default config is minimal.  You'll have to enable support for any non-standard things you may be using.  I use reiserfs and netatalk, so I enabled support for that filesystem and also for appletalk.
 
 
  
 
===Compile your kernel===
 
===Compile your kernel===
Line 36: Line 31:
  
 
Sit back and listen to music.  Go to the store.  Wash the dog.
 
Sit back and listen to music.  Go to the store.  Wash the dog.
 
  
 
===Backup your old kernel and dtb file===
 
===Backup your old kernel and dtb file===
Line 42: Line 36:
 
  # cp /boot/uImage /boot/uImage.bak
 
  # cp /boot/uImage /boot/uImage.bak
 
  # cp /boot/kuroboxHG.dtb /boot/kuroboxHG.dtb.bak
 
  # cp /boot/kuroboxHG.dtb /boot/kuroboxHG.dtb.bak
 
 
  
 
===Compile the dtb file===
 
===Compile the dtb file===
Line 50: Line 42:
 
  # ../dtc -I dts -O dtb -V 16 -o /tmp/kuroboxHG.dtb kuroboxHG.dts
 
  # ../dtc -I dts -O dtb -V 16 -o /tmp/kuroboxHG.dtb kuroboxHG.dts
 
  # cp /tmp/kuroboxHG.dtb /boot/kuroboxHG.dtb
 
  # cp /tmp/kuroboxHG.dtb /boot/kuroboxHG.dtb
 
 
  
 
===Install the kernel===
 
===Install the kernel===
  
 
  # cp /usr/src/linux/arch/powerpc/boot/uImage /boot/uImage
 
  # cp /usr/src/linux/arch/powerpc/boot/uImage /boot/uImage
 
 
  
 
===Reboot===
 
===Reboot===
Line 65: Line 53:
 
With any luck, you'll be booting your new kernel.
 
With any luck, you'll be booting your new kernel.
  
 +
===Troubleshooting===
  
 
===Troubleshooting===
 
 
If something goes wrong, simply boot in EM mode and copy your old kernel back.
 
If something goes wrong, simply boot in EM mode and copy your old kernel back.
  

Revision as of 15:32, 24 November 2008

This is a tutorial of how to compile a uBoot kernel from vanilla gentoo-sources.

Contents

Get the sources

Right now (24 Nov 2008) the latest stable version is gentoo-sources-2.6.26-r2. If you want a newer kernel, simply edit /etc/portage/package.keywords and add this line: sys-kernel/gentoo-sources ~ppc

then download the kernel sources

# emerge -ua gentoo-sources

make a link to the kernel sources

# cd /usr/src
# ln -sfn linux-2.6.26-gentoo-r2 linux

Edit your kernel config

Clean up before you begin

# cd /usr/src/linux
# make mrproper

Use the default KuroBox config

# cp arch/powerpc/configs/linkstation_defconfig .config

Make sure the config is sane

# make menuconfig

The default config is minimal. You'll have to enable support for any non-standard things you may be using. I use reiserfs and netatalk, so I enabled support for that filesystem and also for appletalk.

Compile your kernel

# make uImage && make modules && make modules_install

Sit back and listen to music. Go to the store. Wash the dog.

Backup your old kernel and dtb file

# cp /boot/uImage /boot/uImage.bak
# cp /boot/kuroboxHG.dtb /boot/kuroboxHG.dtb.bak

Compile the dtb file

# cd /usr/src/linux/arch/powerpc/boot/dts
# ../dtc -I dts -O dtb -V 16 -o /tmp/kuroboxHG.dtb kuroboxHG.dts
# cp /tmp/kuroboxHG.dtb /boot/kuroboxHG.dtb

Install the kernel

# cp /usr/src/linux/arch/powerpc/boot/uImage /boot/uImage

Reboot

# reboot

With any luck, you'll be booting your new kernel.

Troubleshooting

If something goes wrong, simply boot in EM mode and copy your old kernel back.

# cp /boot/uImage.bak /boot/uImage
# cp /boot/kuroboxHG.dtb.bak /boot/kuroboxHG.dtb
# echo -n "OKOK" > /dev/fl3