Difference between revisions of "i.MX53 SODIMM PC Barebox"

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Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.
 
Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.
  
−
== Building images ==
+
== Set toolchain ==
−
 
 
−
=== Set toolchain ===
 
 
Export [[i.MX53_SODIMM_PC_Toolchain|toolchain variables]] for every related terminal session.
 
Export [[i.MX53_SODIMM_PC_Toolchain|toolchain variables]] for every related terminal session.
  
−
=== Set shell variables ===
+
== Set shell variables ==
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
BB_VERSION=2014.03.0
 
BB_VERSION=2014.03.0
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</syntaxhighlight>
 
</syntaxhighlight>
  
−
=== Download and extract source code ===
+
== Download and extract source code ==
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
mkdir -pv ~/workdir/vmx53/barebox/
 
mkdir -pv ~/workdir/vmx53/barebox/
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</syntaxhighlight>
 
</syntaxhighlight>
  
−
=== Download and apply Voipac patches ===
+
== Download and apply Voipac patches ==
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
cd ~/workdir/vmx53/barebox/
 
cd ~/workdir/vmx53/barebox/
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patch -p1 < ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.patch
 
patch -p1 < ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.patch
 
cp ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.cfg .config
 
cp ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.cfg .config
−
</syntaxhighlight>
 
−
 
−
=== Compile ===
 
−
Output file is called arch/arm/pbl/zbarebox.bin:
 
−
<syntaxhighlight lang="bash">
 
−
cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
 
−
#make ARCH=arm menuconfig
 
−
make -j4
 
 
</syntaxhighlight>
 
</syntaxhighlight>
  
 
== Configure ==
 
== Configure ==
−
 
 
=== Edit boot options ===
 
=== Edit boot options ===
  
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</syntaxhighlight>
 
</syntaxhighlight>
  
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=== Set correct DTB file based on module configuration ===
+
=== DTB file selection ===
−
Because each configuration uses an altered device tree, defining the correct board variant is important:
+
As different module configurations use altered device trees, defining the correct board variant is important:
 
<syntaxhighlight lang="bash">
 
<syntaxhighlight lang="bash">
 
barebox@Voipac VMX53:/ edit /env/config
 
barebox@Voipac VMX53:/ edit /env/config
Line 95: Line 84:
 
barebox@Voipac VMX53:/ saveenv
 
barebox@Voipac VMX53:/ saveenv
 
barebox@Voipac VMX53:/ reset
 
barebox@Voipac VMX53:/ reset
 +
</syntaxhighlight>
 +
 +
== Compile ==
 +
Output file is called arch/arm/pbl/zbarebox.bin:
 +
<syntaxhighlight lang="bash">
 +
cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
 +
#make ARCH=arm menuconfig
 +
make -j4
 
</syntaxhighlight>
 
</syntaxhighlight>

Revision as of 09:21, 22 April 2021

i.MX53 SODIMM PC - Development kit uses Barebox as a bootloader. This page displays how to configure and build it.

Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.

Set toolchain

Export toolchain variables for every related terminal session.

Set shell variables

BB_VERSION=2014.03.0
SW_VERSION=20150308

Download and extract source code

mkdir -pv ~/workdir/vmx53/barebox/
cd ~/workdir/vmx53/barebox/
wget http://barebox.org/download/barebox-${BB_VERSION}.tar.bz2
tar xvjf barebox-${BB_VERSION}.tar.bz2
mv barebox-${BB_VERSION} barebox-${BB_VERSION}.orig
cp -rv barebox-${BB_VERSION}.orig barebox-${BB_VERSION}.work

Download and apply Voipac patches

cd ~/workdir/vmx53/barebox/
wget http://downloads.voipac.com/files/i.MX53_SODIMM_PC-Development_kit/module/software/barebox/sources/barebox-2014.03.0_vmx53_20151129.cfg
wget http://downloads.voipac.com/files/i.MX53_SODIMM_PC-Development_kit/module/software/barebox/sources/barebox-2014.03.0_vmx53_20151129.patch
cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
patch -p1 < ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.patch
cp ../barebox-${BB_VERSION}_vmx53_${SW_VERSION}.cfg .config

Configure

Edit boot options

Barebox provides 4 boot configurations by default:

  • nand-legacy-ubi
    • Load kernel (nand - kernel)
    • Attach rootfs (nand - rootfs)
  • nand-dtb-ubi
    • Load kernel (nand - kernel)
    • Load device tree (nand - bareboxenv)
    • Attach rootfs (nand - rootfs)
  • net-legacy
    • Load kernel (tftp)
    • Attach rootfs (nfs)
  • net-dtb
    • Load kernel (tftp)
    • Load device tree (tftp)
    • Attach rootfs (nfs)


Boot configuration files support options to define custom kernel and rootfs names or paths: 

barebox@Voipac VMX53:/ edit /env/boot/net-dtb
barebox@Voipac VMX53:/ edit /env/config

# list of boot entries. These are executed in order until one
# succeeds. An entry can be:
# - a filename in /env/boot/
# - a full path to a directory. All files in this directory are
#   treated as boot files and executed in alphabetical order
global.boot.default=nand-dtb-ubi

DTB file selection

As different module configurations use altered device trees, defining the correct board variant is important: 

barebox@Voipac VMX53:/ edit /env/config
...
# BASIC=557, PRO=668, MAX=779
#global.vmxmodel=557
global.vmxmodel=668
#global.vmxmodel=779
...
barebox@Voipac VMX53:/ saveenv
barebox@Voipac VMX53:/ reset

Compile

Output file is called arch/arm/pbl/zbarebox.bin: 

cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
#make ARCH=arm menuconfig
make -j4
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