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. | ||
| − | == Set toolchain == | + | == Building images == |
| + | === 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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</syntaxhighlight> | </syntaxhighlight> | ||
| − | == | + | === Compile === |
| + | Output file is called arch/arm/pbl/zbarebox.bin: | ||
| + | <syntaxhighlight lang="bash"> | ||
| + | cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work | ||
| + | #make ARCH=arm menuconfig | ||
| + | make -j4 | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | == Configuring bootloader environment == | ||
=== Edit boot options === | === Edit boot options === | ||
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barebox@Voipac VMX53:/ saveenv | barebox@Voipac VMX53:/ saveenv | ||
barebox@Voipac VMX53:/ reset | barebox@Voipac VMX53:/ reset | ||
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</syntaxhighlight> | </syntaxhighlight> | ||
Revision as of 08:26, 22 April 2021
i.MX53 SODIMM PC - Development kit uses Barebox as a bootloader. This page displays how to configure and build it.
Barebox is a bootloader responsible for hardware initialization, loading and booting Linux kernel. It is also used for module flashing.
Building images
Set toolchain
Export toolchain variables for every related terminal session.
Set shell variables
BB_VERSION=2014.03.0 SW_VERSION=20150308
Download and extract source code
mkdir -pv ~/workdir/vmx53/barebox/
cd ~/workdir/vmx53/barebox/
wget http://barebox.org/download/barebox-${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
Compile
Output file is called arch/arm/pbl/zbarebox.bin:
cd ~/workdir/vmx53/barebox/barebox-${BB_VERSION}.work
#make ARCH=arm menuconfig
make -j4
Configuring bootloader environment
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